Release 1.37.0

[SVN r49549]
CodeGear patch. Fixes #2342
2025-10-04 19:51:02 +02:00 · 2008-11-03 12:44:25 +00:00 · 2008-10-13 19:22:17 +00:00 · 2008-09-28 15:05:17 +00:00 · 2008-07-23 20:47:47 +00:00 · 2008-07-12 16:18:05 +00:00
128 changed files with 16821 additions and 2233 deletions
--- a/compatibility.htm
+++ b/compatibility.htm
@@ -1,105 +1,88 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-
 <html>
-
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
-<title>Smart Pointer Changes</title>
-</head>
-
-<body bgcolor="#FFFFFF" text="#000000">
-
-<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" width="277" height="86">Smart
-Pointer Changes</h1>
-
-<p>The February 2002 change to the Boost smart pointers introduced a number
-of changes. Since the previous version of the smart pointers was in use for
-a long time, it's useful to have a detailed list of what changed from a library
-user's point of view.</p>
-
-<p>Note that for compilers that don't support member templates well enough,
-a separate implementation is used that lacks many of the new features and is
-more like the old version.</p>
-
-<h2>Features Requiring Code Changes to Take Advantage</h2>
-
-<ul>
-
-<li>The smart pointer class templates now each have their own header file.
-For compatibility, the
-<a href="../../boost/smart_ptr.hpp">&lt;boost/smart_ptr.hpp&gt;</a>
-header now includes the headers for the four classic smart pointer class templates.</li>
-
-<li>The <b>weak_ptr</b> template was added.</li>
-
-<li>The new <b>shared_ptr</b> and <b>shared_array</b> relax the requirement that the pointed-to object's
-destructor must be visible when instantiating the <b>shared_ptr</b> destructor.
-This makes it easier to have shared_ptr members in classes without explicit destructors.</li>
-
-<li>A custom deallocator can be passed in when creating a <b>shared_ptr</b> or <b>shared_array</b>.</li>
-
-<li><b>shared_static_cast</b> and <b>shared_dynamic_cast</b> function templates are
-provided which work for <b>shared_ptr</b> and <b>weak_ptr</b> as <b>static_cast</b> and
-<b>dynamic_cast</b> do for pointers.</li>
-
-<li>The self-assignment misfeature has been removed from <b>shared_ptr::reset</b>,
-although it is still present in <b>scoped_ptr</b>, and in <b>std::auto_ptr</b>.
-Calling <b>reset</b> with a pointer to the object that's already owned by the
-<b>shared_ptr</b> results in undefined behavior
-(an assertion, or eventually a double-delete if assertions are off).</li>
-
-<li>The <b>BOOST_SMART_PTR_CONVERSION</b> feature has been removed.</li>
-
-<li><b>shared_ptr&lt;void&gt;</b> is now allowed.</li>
-
-</ul>
-
-<h2>Features That Improve Robustness</h2>
-
-<ul>
-
-<li>The manipulation of use counts is now <a name="threadsafe">thread safe</a> on Windows, Linux, and platforms
-that support pthreads. See the
-<a href="../../boost/detail/atomic_count.hpp">&lt;boost/detail/atomic_count.hpp&gt;</a>
-file for details</li>
-
-<li>The new shared_ptr will always delete the object using the pointer it was originally constructed with.
-This prevents subtle problems that could happen if the last <b>shared_ptr</b> was a pointer to a sub-object
-of a class that did not have a virtual destructor.</li>
-
-</ul>
-
-<h2>Implementation Details</h2>
-
-<ul>
-
-<li>Some bugs in the assignment operator implementations and in <b>reset</b>
-have been fixed by using the &quot;copy and swap&quot; idiom.</li>
-
-<li>Assertions have been added to check preconditions of various functions;
-however, since these use the new
-<a href="../../boost/assert.hpp">&lt;boost/assert.hpp&gt;</a>
-header, the assertions are disabled by default.</li>
-
-<li>The partial specialization of <b>std::less</b> has been replaced by <b>operator&lt;</b>
-overloads which accomplish the same thing without relying on undefined behavior.</li>
-
-<li>The incorrect overload of <b>std::swap</b> has been replaced by <b>boost::swap</b>, which
-has many of the same advantages for generic programming but does not violate the C++ standard.</li>
-
-</ul>
-
-<hr>
-
-<p>Revised 1 February 2002</p>
-
-<p>Copyright 2002 Darin Adler.
-Permission to copy, use,
-modify, sell and distribute this document is granted provided this copyright
-notice appears in all copies. This document is provided &quot;as is&quot;
-without express or implied warranty, and with no claim as to its suitability for
-any purpose.</p>
-
-</body>
-
+	<head>
+		<title>Smart Pointer Changes</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body bgcolor="#ffffff" text="#000000">
+		<h1><A href="../../index.htm"><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86"
+					border="0"></A>Smart Pointer Changes</h1>
+		<p>The February 2002 change to the Boost smart pointers introduced a number of 
+			changes. Since the previous version of the smart pointers was in use for a long 
+			time, it's useful to have a detailed list of what changed from a library user's 
+			point of view.</p>
+		<p>Note that for compilers that don't support member templates well enough, a 
+			separate implementation is used that lacks many of the new features and is more 
+			like the old version.</p>
+		<h2>Features Requiring Code Changes to Take Advantage</h2>
+		<ul>
+			<li>
+				The smart pointer class templates now each have their own header file. For 
+				compatibility, the <a href="../../boost/smart_ptr.hpp">&lt;boost/smart_ptr.hpp&gt;</a>
+			header now includes the headers for the four classic smart pointer class 
+			templates.
+			<li>
+				The <b>weak_ptr</b>
+			template was added.
+			<li>
+				The new <b>shared_ptr</b> and <b>shared_array</b> relax the requirement that 
+				the pointed-to object's destructor must be visible when instantiating the <b>shared_ptr</b>
+			destructor. This makes it easier to have shared_ptr members in classes without 
+			explicit destructors.
+			<li>
+				A custom deallocator can be passed in when creating a <b>shared_ptr</b> or <b>shared_array</b>.
+			<li>
+				<b>shared_static_cast</b> and <b>shared_dynamic_cast</b> function templates are 
+				provided which work for <b>shared_ptr</b> and <b>weak_ptr</b> as <b>static_cast</b>
+				and <b>dynamic_cast</b>
+			do for pointers.
+			<li>
+				The self-assignment misfeature has been removed from <b>shared_ptr::reset</b>, 
+				although it is still present in <b>scoped_ptr</b>, and in <b>std::auto_ptr</b>. 
+				Calling <b>reset</b> with a pointer to the object that's already owned by the <b>shared_ptr</b>
+			results in undefined behavior (an assertion, or eventually a double-delete if 
+			assertions are off).
+			<li>
+				The <b>BOOST_SMART_PTR_CONVERSION</b>
+			feature has been removed.
+			<li>
+				<b>shared_ptr&lt;void&gt;</b> is now allowed.</li>
+		</ul>
+		<h2>Features That Improve Robustness</h2>
+		<ul>
+			<li>
+				The manipulation of use counts is now <a name="threadsafe">thread safe</a> on 
+				Windows, Linux, and platforms that support pthreads. See the <a href="../../boost/detail/atomic_count.hpp">
+					&lt;boost/detail/atomic_count.hpp&gt;</a>
+			file for details
+			<li>
+				The new shared_ptr will always delete the object using the pointer it was 
+				originally constructed with. This prevents subtle problems that could happen if 
+				the last <b>shared_ptr</b> was a pointer to a sub-object of a class that did 
+				not have a virtual destructor.</li>
+		</ul>
+		<h2>Implementation Details</h2>
+		<ul>
+			<li>
+				Some bugs in the assignment operator implementations and in <b>reset</b>
+			have been fixed by using the "copy and swap" idiom.
+			<li>
+				Assertions have been added to check preconditions of various functions; 
+				however, since these use the new <a href="../../boost/assert.hpp">&lt;boost/assert.hpp&gt;</a>
+			header, the assertions are disabled by default.
+			<li>
+				The partial specialization of <b>std::less</b> has been replaced by <b>operator&lt;</b>
+			overloads which accomplish the same thing without relying on undefined 
+			behavior.
+			<li>
+				The incorrect overload of <b>std::swap</b> has been replaced by <b>boost::swap</b>, 
+				which has many of the same advantages for generic programming but does not 
+				violate the C++ standard.</li>
+		</ul>
+		<hr>
+		<p>Revised 1 February 2002</p>
+		<p><small>Copyright 2002 Darin Adler. Distributed under the Boost Software License, Version 
+				1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+				copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
+	</body>
 </html>
--- a/enable_shared_from_this.html
+++ b/enable_shared_from_this.html
@@ -0,0 +1,91 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html>
+	<head>
+		<title>Boost: enable_shared_from_this.hpp documentation</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body bgcolor="white" style="MARGIN-LEFT: 5%; MARGIN-RIGHT: 5%">
+		<table border="0" width="100%">
+			<tr>
+				<td width="277"><A href="../../index.htm"> <img src="../../boost.png" alt="boost.png (6897 bytes)" width="277" height="86" border="0"></A>
+				</td>
+				<td align="center">
+					<h1>enable_shared_from_this.hpp</h1>
+				</td>
+			</tr>
+			<tr>
+				<td colspan="2" height="64">&nbsp;</td>
+			</tr>
+		</table>
+		<h3><a name="Purpose">Purpose</a></h3>
+		<p>
+			The header <STRONG>&lt;boost/enable_shared_from_this.hpp&gt;</STRONG> defines 
+			the class template <STRONG>enable_shared_from_this</STRONG>. It is used as a 
+			base class that allows a <A href="shared_ptr.htm">shared_ptr</A> to the current 
+			object to be obtained from within a member function.
+		</p>
+		<P><STRONG>enable_shared_from_this&lt;T&gt;</STRONG> defines two member functions 
+			called <STRONG>shared_from_this</STRONG> that return a <STRONG>shared_ptr&lt;T&gt;</STRONG>
+			and <STRONG>shared_ptr&lt;T const&gt;</STRONG>, depending on constness, to <STRONG>this</STRONG>.</P>
+		<h3><a name="Example">Example</a></h3>
+		<pre>
+class Y: public enable_shared_from_this&lt;Y&gt;
+{
+public:
+
+    shared_ptr&lt;Y&gt; f()
+    {
+        return shared_from_this();
+    }
+}
+
+int main()
+{
+    shared_ptr&lt;Y&gt; p(new Y);
+    shared_ptr&lt;Y&gt; q = p-&gt;f();
+    assert(p == q);
+    assert(!(p &lt; q || q &lt; p)); // p and q must share ownership
+}
+</pre>
+		<h3><a name="Synopsis">Synopsis</a></h3>
+		<pre>
+namespace boost
+{
+
+template&lt;class T&gt; class enable_shared_from_this
+{
+public:
+
+    shared_ptr&lt;T&gt; shared_from_this();
+    shared_ptr&lt;T const&gt; shared_from_this() const;
+}
+
+}
+</pre>
+		<h4>template&lt;class T&gt; shared_ptr&lt;T&gt; 
+			enable_shared_from_this&lt;T&gt;::shared_from_this();</h4>
+		<h4>template&lt;class T&gt; shared_ptr&lt;T const&gt; 
+			enable_shared_from_this&lt;T&gt;::shared_from_this() const;</h4>
+		<blockquote>
+			<p>
+				<b>Requires:</b> <STRONG>enable_shared_from_this&lt;T&gt;</STRONG> must be an 
+				accessible base class of <b>T</b>. <STRONG>*this</STRONG> must be a subobject 
+				of an instance <STRONG>t</STRONG> of type <STRONG>T</STRONG> . There must exist 
+				at least one <STRONG>shared_ptr</STRONG> instance <STRONG>p</STRONG> that <EM>owns</EM>
+				<STRONG>t</STRONG>.
+			</p>
+			<p>
+				<b>Returns:</b> A <b>shared_ptr&lt;T&gt;</b> instance <b>r</b> that shares 
+				ownership with <b>p</b>.
+			</p>
+			<p>
+				<b>Postconditions:</b> <tt>r.get() == this</tt>.
+			</p>
+		</blockquote>
+		<p>
+			<br>
+			<small>Copyright <20> 2002, 2003 by Peter Dimov. Distributed under the Boost Software License, Version 
+				1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+				copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
+	</body>
+</html>
--- a/example/scoped_ptr_example.cpp
+++ b/example/scoped_ptr_example.cpp
@@ -1,5 +1,12 @@
 // Boost scoped_ptr_example implementation file  -----------------------------//

+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
 #include "scoped_ptr_example.hpp"
 #include <iostream>

--- a/example/scoped_ptr_example.hpp
+++ b/example/scoped_ptr_example.hpp
@@ -1,5 +1,12 @@
 //  Boost scoped_ptr_example header file  ------------------------------------//

+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
 #include <boost/utility.hpp>
 #include <boost/scoped_ptr.hpp>

--- a/example/scoped_ptr_example_test.cpp
+++ b/example/scoped_ptr_example_test.cpp
@@ -0,0 +1,17 @@
+// Boost scoped_ptr_example_test main program  -------------------------------//
+
+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
+#include "scoped_ptr_example.hpp"
+
+int main()
+{
+  example my_example;
+  my_example.do_something();
+  return 0;
+}
--- a/example/shared_ptr_example.cpp
+++ b/example/shared_ptr_example.cpp
@@ -1,12 +1,11 @@
 //  Boost shared_ptr_example.cpp  --------------------------------------------//

-//  (C) Copyright Beman Dawes 2001. Permission to copy,
-//  use, modify, sell and distribute this software is granted provided this
-//  copyright notice appears in all copies. This software is provided "as is"
-//  without express or implied warranty, and with no claim as to its
-//  suitability for any purpose.
+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

-//  See http://www.boost.org for most recent version including documentation.
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.

 //  Revision History
 //  21 May 01  Initial complete version (Beman Dawes)
--- a/example/shared_ptr_example2.cpp
+++ b/example/shared_ptr_example2.cpp
@@ -1,5 +1,12 @@
 // Boost shared_ptr_example2 implementation file  -----------------------------//

+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
 #include "shared_ptr_example2.hpp"
 #include <iostream>

@@ -10,10 +17,6 @@ class example::implementation
 };

 example::example() : _imp( new implementation ) {}
-example::example( const example & s ) : _imp( s._imp ) {}
-
-example & example::operator=( const example & s )
-  { _imp = s._imp; return *this; }

 void example::do_something()
  { std::cout << "use_count() is " << _imp.use_count() << "\n"; }
--- a/example/shared_ptr_example2.hpp
+++ b/example/shared_ptr_example2.hpp
@@ -1,5 +1,12 @@
 //  Boost shared_ptr_example2 header file  -----------------------------------//

+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
 #include <boost/shared_ptr.hpp>

 //  This example demonstrates the handle/body idiom (also called pimpl and
@@ -14,12 +21,10 @@

 class example
 {
- public:
+public:
  example();
-  example( const example & );
-  example & operator=( const example & );
  void do_something();
- private:
+private:
  class implementation;
  boost::shared_ptr< implementation > _imp; // hide implementation details
 };
--- a/example/shared_ptr_example2_test.cpp
+++ b/example/shared_ptr_example2_test.cpp
@@ -1,5 +1,12 @@
 // Boost shared_ptr_example2_test main program  ------------------------------//

+//  Copyright Beman Dawes 2001.  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org/libs/smart_ptr for documentation.
+
 #include "shared_ptr_example2.hpp"

 int main()
--- a/include/boost/detail/atomic_count.hpp
+++ b/include/boost/detail/atomic_count.hpp
@@ -1,8 +1,10 @@
 #ifndef BOOST_DETAIL_ATOMIC_COUNT_HPP_INCLUDED
 #define BOOST_DETAIL_ATOMIC_COUNT_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
@@ -10,10 +12,9 @@
 //
 //  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //
 //  typedef <implementation-defined> boost::detail::atomic_count;
 //
@@ -72,9 +73,6 @@
 //      are called driven by smart_ptr interface...
 //

-//  Note: atomic_count_linux.hpp has been disabled by default; see the
-//        comments inside for more info.
-
 #include <boost/config.hpp>

 #ifndef BOOST_HAS_THREADS
@@ -91,32 +89,30 @@ typedef long atomic_count;

 }

-#elif defined(BOOST_USE_ASM_ATOMIC_H)
-#  include <boost/detail/atomic_count_linux.hpp>
 #elif defined(BOOST_AC_USE_PTHREADS)
 #  include <boost/detail/atomic_count_pthreads.hpp>
+
+#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) )
+# include <boost/detail/atomic_count_gcc_x86.hpp>
+
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
 #  include <boost/detail/atomic_count_win32.hpp>
-#elif defined(__GLIBCPP__)
+
+#elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+#  include <boost/detail/atomic_count_sync.hpp>
+
+#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
 #  include <boost/detail/atomic_count_gcc.hpp>
+
 #elif defined(BOOST_HAS_PTHREADS)
+
 #  define BOOST_AC_USE_PTHREADS
 #  include <boost/detail/atomic_count_pthreads.hpp>
+
 #else

-// #warning Unrecognized platform, detail::atomic_count will not be thread safe
-
-namespace boost
-{
-
-namespace detail
-{
-
-typedef long atomic_count;
-
-}
-
-}
+// Use #define BOOST_DISABLE_THREADS to avoid the error
+#error Unrecognized threading platform

 #endif

--- a/include/boost/detail/atomic_count_gcc.hpp
+++ b/include/boost/detail/atomic_count_gcc.hpp
@@ -10,11 +10,11 @@
 //
 //  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
 //  Copyright (c) 2002 Lars Gullik Bj<42>nnes <larsbj@lyx.org>
+//  Copyright 2003-2005 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //

 #include <bits/atomicity.h>
@@ -25,6 +25,13 @@ namespace boost
 namespace detail
 {

+#if defined(__GLIBCXX__) // g++ 3.4+
+
+using __gnu_cxx::__atomic_add;
+using __gnu_cxx::__exchange_and_add;
+
+#endif
+
 class atomic_count
 {
 public:
@@ -38,7 +45,7 @@ public:

    long operator--()
    {
-        return !__exchange_and_add(&value_, -1);
+        return __exchange_and_add(&value_, -1) - 1;
    }

    operator long() const
@@ -51,7 +58,7 @@ private:
    atomic_count(atomic_count const &);
    atomic_count & operator=(atomic_count const &);

-    _Atomic_word value_;
+    mutable _Atomic_word value_;
 };

 } // namespace detail
--- a/include/boost/detail/atomic_count_gcc_x86.hpp
+++ b/include/boost/detail/atomic_count_gcc_x86.hpp
@@ -0,0 +1,84 @@
+#ifndef BOOST_DETAIL_ATOMIC_COUNT_GCC_X86_HPP_INCLUDED
+#define BOOST_DETAIL_ATOMIC_COUNT_GCC_X86_HPP_INCLUDED
+
+//
+//  boost/detail/atomic_count_gcc_x86.hpp
+//
+//  atomic_count for g++ on 486+/AMD64
+//
+//  Copyright 2007 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+public:
+
+    explicit atomic_count( long v ) : value_( static_cast< int >( v ) ) {}
+
+    void operator++()
+    {
+        __asm__
+        (
+            "lock\n\t"
+            "incl %0":
+            "+m"( value_ ): // output (%0)
+            : // inputs
+            "cc" // clobbers
+        );
+    }
+
+    long operator--()
+    {
+        return atomic_exchange_and_add( &value_, -1 ) - 1;
+    }
+
+    operator long() const
+    {
+        return atomic_exchange_and_add( &value_, 0 );
+    }
+
+private:
+
+    atomic_count(atomic_count const &);
+    atomic_count & operator=(atomic_count const &);
+
+    mutable int value_;
+
+private:
+
+    static int atomic_exchange_and_add( int * pw, int dv )
+    {
+        // int r = *pw;
+        // *pw += dv;
+        // return r;
+
+        int r;
+
+        __asm__ __volatile__
+        (
+            "lock\n\t"
+            "xadd %1, %0":
+            "+m"( *pw ), "=r"( r ): // outputs (%0, %1)
+            "1"( dv ): // inputs (%2 == %1)
+            "memory", "cc" // clobbers
+        );
+
+        return r;
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
--- a/include/boost/detail/atomic_count_linux.hpp
+++ b/include/boost/detail/atomic_count_linux.hpp
@@ -1,70 +0,0 @@
-#ifndef BOOST_DETAIL_ATOMIC_COUNT_LINUX_HPP_INCLUDED
-#define BOOST_DETAIL_ATOMIC_COUNT_LINUX_HPP_INCLUDED
-
-//
-//  boost/detail/atomic_count_linux.hpp
-//
-//  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-//
-//  This implementation uses <asm/atomic.h>. This is a kernel header;
-//  using kernel headers in a user program may cause a number of problems,
-//  and not all flavors of Linux provide the atomic instructions.
-//
-//  This file is only provided because the performance of this implementation
-//  is significantly higher than the pthreads version. Use at your own risk
-//  (by defining BOOST_USE_ASM_ATOMIC_H.)
-//
-
-#include <asm/atomic.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class atomic_count
-{
-public:
-
-    explicit atomic_count(long v)
-    {
-        atomic_t init = ATOMIC_INIT(v);
-        value_ = init;
-    }
-
-    void operator++()
-    {
-        atomic_inc(&value_);
-    }
-
-    long operator--()
-    {
-        return !atomic_dec_and_test(&value_);
-    }
-
-    operator long() const
-    {
-        return atomic_read(&value_);
-    }
-
-private:
-
-    atomic_count(atomic_count const &);
-    atomic_count & operator=(atomic_count const &);
-
-    atomic_t value_;
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_LINUX_HPP_INCLUDED
--- a/include/boost/detail/atomic_count_pthreads.hpp
+++ b/include/boost/detail/atomic_count_pthreads.hpp
@@ -6,10 +6,9 @@
 //
 //  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

 #include <pthread.h>
--- a/include/boost/detail/atomic_count_solaris.hpp
+++ b/include/boost/detail/atomic_count_solaris.hpp
@@ -0,0 +1,59 @@
+#ifndef BOOST_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
+#define BOOST_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
+
+//
+//  boost/detail/atomic_count_solaris.hpp
+//   based on: boost/detail/atomic_count_win32.hpp
+//
+//  Copyright (c) 2001-2005 Peter Dimov
+//  Copyright (c) 2006 Michael van der Westhuizen
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <atomic.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+public:
+
+    explicit atomic_count( uint32_t v ): value_( v )
+    {
+    }
+
+    long operator++()
+    {
+        return atomic_inc_32_nv( &value_ );
+    }
+
+    long operator--()
+    {
+        return atomic_dec_32_nv( &value_ );
+    }
+
+    operator uint32_t() const
+    {
+        return static_cast<uint32_t const volatile &>( value_ );
+    }
+
+private:
+
+    atomic_count( atomic_count const & );
+    atomic_count & operator=( atomic_count const & );
+
+    uint32_t value_;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
--- a/include/boost/detail/atomic_count_sync.hpp
+++ b/include/boost/detail/atomic_count_sync.hpp
@@ -0,0 +1,61 @@
+#ifndef BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
+#define BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
+
+//
+//  boost/detail/atomic_count_sync.hpp
+//
+//  atomic_count for g++ 4.1+
+//
+//  http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html
+//
+//  Copyright 2007 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#if defined( __ia64__ ) && defined( __INTEL_COMPILER )
+# include <ia64intrin.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+public:
+
+    explicit atomic_count( long v ) : value_( v ) {}
+
+    void operator++()
+    {
+        __sync_add_and_fetch( &value_, 1 );
+    }
+
+    long operator--()
+    {
+        return __sync_add_and_fetch( &value_, -1 );
+    }
+
+    operator long() const
+    {
+        return __sync_fetch_and_add( &value_, 0 );
+    }
+
+private:
+
+    atomic_count(atomic_count const &);
+    atomic_count & operator=(atomic_count const &);
+
+    mutable long value_;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
--- a/include/boost/detail/atomic_count_win32.hpp
+++ b/include/boost/detail/atomic_count_win32.hpp
@@ -1,22 +1,23 @@
 #ifndef BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
 #define BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
 //  boost/detail/atomic_count_win32.hpp
 //
-//  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2001-2005 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

-#include <boost/detail/winapi.hpp>
+#include <boost/detail/interlocked.hpp>

 namespace boost
 {
@@ -28,31 +29,31 @@ class atomic_count
 {
 public:

-    explicit atomic_count(long v): value_(v)
+    explicit atomic_count( long v ): value_( v )
    {
    }

    long operator++()
    {
-        return winapi::InterlockedIncrement(&value_);
+        return BOOST_INTERLOCKED_INCREMENT( &value_ );
    }

    long operator--()
    {
-        return winapi::InterlockedDecrement(&value_);
+        return BOOST_INTERLOCKED_DECREMENT( &value_ );
    }

    operator long() const
    {
-        return value_;
+        return static_cast<long const volatile &>( value_ );
    }

 private:

-    atomic_count(atomic_count const &);
-    atomic_count & operator=(atomic_count const &);
+    atomic_count( atomic_count const & );
+    atomic_count & operator=( atomic_count const & );

-    volatile long value_;
+    long value_;
 };

 } // namespace detail
--- a/include/boost/detail/bad_weak_ptr.hpp
+++ b/include/boost/detail/bad_weak_ptr.hpp
@@ -0,0 +1,59 @@
+#ifndef BOOST_BAD_WEAK_PTR_HPP_INCLUDED
+#define BOOST_BAD_WEAK_PTR_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/bad_weak_ptr.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <exception>
+
+#ifdef __BORLANDC__
+# pragma warn -8026     // Functions with excep. spec. are not expanded inline
+#endif
+
+namespace boost
+{
+
+// The standard library that comes with Borland C++ 5.5.1, 5.6.4
+// defines std::exception and its members as having C calling
+// convention (-pc). When the definition of bad_weak_ptr
+// is compiled with -ps, the compiler issues an error.
+// Hence, the temporary #pragma option -pc below.
+
+#if defined(__BORLANDC__) && __BORLANDC__ <= 0x564
+# pragma option push -pc
+#endif
+
+class bad_weak_ptr: public std::exception
+{
+public:
+
+    virtual char const * what() const throw()
+    {
+        return "tr1::bad_weak_ptr";
+    }
+};
+
+#if defined(__BORLANDC__) && __BORLANDC__ <= 0x564
+# pragma option pop
+#endif
+
+} // namespace boost
+
+#ifdef __BORLANDC__
+# pragma warn .8026     // Functions with excep. spec. are not expanded inline
+#endif
+
+#endif  // #ifndef BOOST_BAD_WEAK_PTR_HPP_INCLUDED
--- a/include/boost/detail/lightweight_mutex.hpp
+++ b/include/boost/detail/lightweight_mutex.hpp
@@ -1,88 +1,42 @@
 #ifndef BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
 #define BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
 //  boost/detail/lightweight_mutex.hpp - lightweight mutex
 //
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2002, 2003 Peter Dimov and Multi Media Ltd.
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //
 //  typedef <unspecified> boost::detail::lightweight_mutex;
 //
-//  boost::detail::lightweight_mutex meets a subset of the Mutex concept
-//  requirements: http://www.boost.org/libs/thread/doc/mutex_concept.html#Mutex
+//  boost::detail::lightweight_mutex is a header-only implementation of
+//  a subset of the Mutex concept requirements:
 //
-//  * Used by the smart pointer library
-//  * Performance oriented
-//  * Header-only implementation
-//  * Small memory footprint
-//  * Not a general purpose mutex, use boost::mutex, CRITICAL_SECTION or
-//    pthread_mutex instead.
-//  * Never spin in a tight lock/do-something/unlock loop, since
-//    lightweight_mutex does not guarantee fairness.
-//  * Never keep a lightweight_mutex locked for long periods.
+//  http://www.boost.org/doc/html/threads/concepts.html#threads.concepts.Mutex
 //
-//  The current implementation can use a pthread_mutex, a CRITICAL_SECTION,
-//  or a platform-specific spinlock.
+//  It maps to a CRITICAL_SECTION on Windows or a pthread_mutex on POSIX.
 //
-//  You can force a particular implementation by defining BOOST_LWM_USE_PTHREADS,
-//  BOOST_LWM_USE_CRITICAL_SECTION, or BOOST_LWM_USE_SPINLOCK.
-//
-//  If neither macro has been defined, the default is to use a spinlock on Win32,
-//  and a pthread_mutex otherwise.
-//
-//  Note that a spinlock is not a general synchronization primitive. In particular,
-//  it is not guaranteed to be a memory barrier, and it is possible to "livelock"
-//  if a lower-priority thread has acquired the spinlock but a higher-priority
-//  thread is spinning trying to acquire the same lock.
-//
-//  For these reasons, spinlocks have been disabled by default except on Windows,
-//  where a spinlock can be several orders of magnitude faster than a CRITICAL_SECTION.
-
-
-//  Note: lwm_linux.hpp has been disabled by default; see the comments
-//        inside for more info.
-

 #include <boost/config.hpp>

-//  Note to implementors: if you write a platform-specific spinlock
-//  for a platform that supports pthreads, be sure to test its performance
-//  against the pthreads-based version using shared_ptr_timing_test.cpp and
-//  shared_ptr_mt_test.cpp. Custom versions are usually not worth the trouble
-//  _unless_ the performance gains are substantial.
-//
-//  Be sure to compare against a "real" pthreads library;
-//  shared_ptr_timing_test.cpp will compile succesfully with a stub do-nothing
-//  pthreads library, since it doesn't create any threads.
-
-#ifndef BOOST_HAS_THREADS
-#  include <boost/detail/lwm_nop.hpp>
-#elif defined(BOOST_LWM_USE_SPINLOCK) && defined(BOOST_USE_ASM_ATOMIC_H)
-#  include <boost/detail/lwm_linux.hpp>
-#elif defined(BOOST_LWM_USE_CRITICAL_SECTION)
-#  include <boost/detail/lwm_win32_cs.hpp>
-#elif defined(BOOST_LWM_USE_PTHREADS)
+#if !defined(BOOST_HAS_THREADS)
+# include <boost/detail/lwm_nop.hpp>
+#elif defined(BOOST_HAS_PTHREADS)
 #  include <boost/detail/lwm_pthreads.hpp>
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
-#  include <boost/detail/lwm_win32.hpp>
-#elif defined(BOOST_LWM_USE_SPINLOCK) && defined(__sgi)
-#  include <boost/detail/lwm_irix.hpp>
-#elif defined(BOOST_LWM_USE_SPINLOCK) && defined(__GLIBCPP__)
-#  include <boost/detail/lwm_gcc.hpp>
-#elif defined(BOOST_HAS_PTHREADS)
-#  define BOOST_LWM_USE_PTHREADS
-#  include <boost/detail/lwm_pthreads.hpp>
+#  include <boost/detail/lwm_win32_cs.hpp>
 #else
-#  include <boost/detail/lwm_nop.hpp>
+// Use #define BOOST_DISABLE_THREADS to avoid the error
+#  error Unrecognized threading platform
 #endif

 #endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_MUTEX_HPP_INCLUDED
--- a/include/boost/detail/lwm_gcc.hpp
+++ b/include/boost/detail/lwm_gcc.hpp
@@ -1,78 +0,0 @@
-#ifndef BOOST_DETAIL_LWM_GCC_HPP_INCLUDED
-#define BOOST_DETAIL_LWM_GCC_HPP_INCLUDED
-
-//
-//  boost/detail/lwm_gcc.hpp
-//
-//  lightweight_mutex for GNU libstdc++ v3
-//
-//  http://gcc.gnu.org/onlinedocs/porting/Thread-safety.html
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//  Copyright (c) 2002 Lars Gullik Bj<42>nnes <larsbj@lyx.org>
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-#include <bits/atomicity.h>
-#include <sched.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class lightweight_mutex
-{
-private:
-
-    _Atomic_word a_;
-
-    lightweight_mutex(lightweight_mutex const &);
-    lightweight_mutex & operator=(lightweight_mutex const &);
-
-public:
-
-    lightweight_mutex(): a_(1)
-    {
-    }
-
-    class scoped_lock;
-    friend class scoped_lock;
-
-    class scoped_lock
-    {
-    private:
-
-        lightweight_mutex & m_;
-
-        scoped_lock(scoped_lock const &);
-        scoped_lock & operator=(scoped_lock const &);
-
-    public:
-
-        explicit scoped_lock(lightweight_mutex & m): m_(m)
-        {
-            while( !__exchange_and_add(&m_.a_, -1) )
-            {
-                __atomic_add(&m_.a_, 1);
-                sched_yield();
-            }
-        }
-
-        ~scoped_lock()
-        {
-            __atomic_add(&m_.a_, 1);
-        }
-    };
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_DETAIL_LWM_GCC_HPP_INCLUDED
--- a/include/boost/detail/lwm_irix.hpp
+++ b/include/boost/detail/lwm_irix.hpp
@@ -1,78 +0,0 @@
-#ifndef BOOST_DETAIL_LWM_IRIX_HPP_INCLUDED
-#define BOOST_DETAIL_LWM_IRIX_HPP_INCLUDED
-
-#if _MSC_VER >= 1020
-#pragma once
-#endif
-
-//
-//  boost/detail/lwm_irix.hpp
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//  Copyright (c) 2002 Dan Gohman
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-#include <sgidefs.h>
-#include <mutex.h>
-#include <sched.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class lightweight_mutex
-{
-private:
-
-    __uint32_t l_;
-
-    lightweight_mutex(lightweight_mutex const &);
-    lightweight_mutex & operator=(lightweight_mutex const &);
-
-public:
-
-    lightweight_mutex(): l_(0)
-    {
-    }
-
-    class scoped_lock;
-    friend class scoped_lock;
-
-    class scoped_lock
-    {
-    private:
-
-        lightweight_mutex & m_;
-
-        scoped_lock(scoped_lock const &);
-        scoped_lock & operator=(scoped_lock const &);
-
-    public:
-
-        explicit scoped_lock(lightweight_mutex & m): m_(m)
-        {
-            while( test_and_set32(&m_.l_, 1) )
-            {
-                sched_yield();
-            }
-        }
-
-        ~scoped_lock()
-        {
-            m_.l_ = 0;
-        }
-    };
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_DETAIL_LWM_IRIX_HPP_INCLUDED
--- a/include/boost/detail/lwm_linux.hpp
+++ b/include/boost/detail/lwm_linux.hpp
@@ -1,89 +0,0 @@
-#ifndef BOOST_DETAIL_LWM_LINUX_HPP_INCLUDED
-#define BOOST_DETAIL_LWM_LINUX_HPP_INCLUDED
-
-#if _MSC_VER >= 1020
-#pragma once
-#endif
-
-//
-//  boost/detail/lwm_linux.hpp
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-//
-//  This implementation uses <asm/atomic.h>. This is a kernel header;
-//  using kernel headers in a user program may cause a number of problems,
-//  and not all flavors of Linux provide the atomic instructions.
-//
-//  This file is only provided because the performance of this implementation
-//  is about 3.5 times higher than the pthreads version. Use at your own risk
-//  (by defining BOOST_USE_ASM_ATOMIC_H.)
-//
-
-#include <asm/atomic.h>
-#include <sched.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class lightweight_mutex
-{
-private:
-
-    atomic_t a_;
-
-    lightweight_mutex(lightweight_mutex const &);
-    lightweight_mutex & operator=(lightweight_mutex const &);
-
-public:
-
-    lightweight_mutex()
-    {
-        atomic_t a = ATOMIC_INIT(1);
-        a_ = a;
-    }
-
-    class scoped_lock;
-    friend class scoped_lock;
-
-    class scoped_lock
-    {
-    private:
-
-        lightweight_mutex & m_;
-
-        scoped_lock(scoped_lock const &);
-        scoped_lock & operator=(scoped_lock const &);
-
-    public:
-
-        explicit scoped_lock(lightweight_mutex & m): m_(m)
-        {
-            while( !atomic_dec_and_test(&m_.a_) )
-            {
-                atomic_inc(&m_.a_);
-                sched_yield();
-            }
-        }
-
-        ~scoped_lock()
-        {
-            atomic_inc(&m_.a_);
-        }
-    };
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_DETAIL_LWM_LINUX_HPP_INCLUDED
--- a/include/boost/detail/lwm_nop.hpp
+++ b/include/boost/detail/lwm_nop.hpp
@@ -1,8 +1,10 @@
 #ifndef BOOST_DETAIL_LWM_NOP_HPP_INCLUDED
 #define BOOST_DETAIL_LWM_NOP_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
@@ -10,10 +12,9 @@
 //
 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

 namespace boost
--- a/include/boost/detail/lwm_pthreads.hpp
+++ b/include/boost/detail/lwm_pthreads.hpp
@@ -1,8 +1,10 @@
 #ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
 #define BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
@@ -10,10 +12,9 @@
 //
 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

 #include <pthread.h>
--- a/include/boost/detail/lwm_win32.hpp
+++ b/include/boost/detail/lwm_win32.hpp
@@ -1,94 +0,0 @@
-#ifndef BOOST_DETAIL_LWM_WIN32_HPP_INCLUDED
-#define BOOST_DETAIL_LWM_WIN32_HPP_INCLUDED
-
-#if _MSC_VER >= 1020
-#pragma once
-#endif
-
-//
-//  boost/detail/lwm_win32.hpp
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-#include <boost/detail/winapi.hpp>
-
-#ifdef __BORLANDC__
-# pragma warn -8027     // Functions containing while are not expanded inline
-#endif
-
-namespace boost
-{
-
-namespace detail
-{
-
-class lightweight_mutex
-{
-private:
-
-    long l_;
-
-    lightweight_mutex(lightweight_mutex const &);
-    lightweight_mutex & operator=(lightweight_mutex const &);
-
-public:
-
-    lightweight_mutex(): l_(0)
-    {
-    }
-
-    class scoped_lock;
-    friend class scoped_lock;
-
-    class scoped_lock
-    {
-    private:
-
-        lightweight_mutex & m_;
-
-        scoped_lock(scoped_lock const &);
-        scoped_lock & operator=(scoped_lock const &);
-
-    public:
-
-        explicit scoped_lock(lightweight_mutex & m): m_(m)
-        {
-            while( winapi::InterlockedExchange(&m_.l_, 1) )
-            {
-                // Note: changed to Sleep(1) from Sleep(0).
-                // According to MSDN, Sleep(0) will never yield
-                // to a lower-priority thread, whereas Sleep(1)
-                // will. Performance seems not to be affected.
-
-                winapi::Sleep(1);
-            }
-        }
-
-        ~scoped_lock()
-        {
-            winapi::InterlockedExchange(&m_.l_, 0);
-
-            // Note: adding a yield here will make
-            // the spinlock more fair and will increase the overall
-            // performance of some applications substantially in
-            // high contention situations, but will penalize the
-            // low contention / single thread case up to 5x
-        }
-    };
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#ifdef __BORLANDC__
-# pragma warn .8027     // Functions containing while are not expanded inline
-#endif
-
-#endif // #ifndef BOOST_DETAIL_LWM_WIN32_HPP_INCLUDED
--- a/include/boost/detail/lwm_win32_cs.hpp
+++ b/include/boost/detail/lwm_win32_cs.hpp
@@ -1,22 +1,25 @@
 #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
 #define BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
 //  boost/detail/lwm_win32_cs.hpp
 //
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2002, 2003 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

-#include <boost/detail/winapi.hpp>
+#ifdef BOOST_USE_WINDOWS_H
+#  include <windows.h>
+#endif

 namespace boost
 {
@@ -24,11 +27,38 @@ namespace boost
 namespace detail
 {

+#ifndef BOOST_USE_WINDOWS_H
+
+struct critical_section
+{
+    struct critical_section_debug * DebugInfo;
+    long LockCount;
+    long RecursionCount;
+    void * OwningThread;
+    void * LockSemaphore;
+#if defined(_WIN64)
+    unsigned __int64 SpinCount;
+#else
+    unsigned long SpinCount;
+#endif
+};
+
+extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
+extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *);
+extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *);
+extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *);
+
+#else
+
+typedef ::CRITICAL_SECTION critical_section;
+
+#endif // #ifndef BOOST_USE_WINDOWS_H
+
 class lightweight_mutex
 {
 private:

-    winapi::critical_section cs_;
+    critical_section cs_;

    lightweight_mutex(lightweight_mutex const &);
    lightweight_mutex & operator=(lightweight_mutex const &);
@@ -37,12 +67,12 @@ public:

    lightweight_mutex()
    {
-        winapi::InitializeCriticalSection(&cs_);
+        InitializeCriticalSection(&cs_);
    }

    ~lightweight_mutex()
    {
-        winapi::DeleteCriticalSection(&cs_);
+        DeleteCriticalSection(&cs_);
    }

    class scoped_lock;
@@ -61,12 +91,12 @@ public:

        explicit scoped_lock(lightweight_mutex & m): m_(m)
        {
-            winapi::EnterCriticalSection(&m_.cs_);
+            EnterCriticalSection(&m_.cs_);
        }

        ~scoped_lock()
        {
-            winapi::LeaveCriticalSection(&m_.cs_);
+            LeaveCriticalSection(&m_.cs_);
        }
    };
 };
--- a/include/boost/detail/shared_array_nmt.hpp
+++ b/include/boost/detail/shared_array_nmt.hpp
@@ -7,10 +7,9 @@
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation.
 //
--- a/include/boost/detail/shared_count.hpp
+++ b/include/boost/detail/shared_count.hpp
@@ -1,238 +1,55 @@
 #ifndef BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED
 #define BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED

-#if _MSC_VER >= 1020
-#pragma once
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif

 //
 //  detail/shared_count.hpp
 //
-//  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //

-#include <boost/config.hpp>
-
-#ifndef BOOST_NO_AUTO_PTR
-# include <memory>
-#endif
-
-#include <boost/checked_delete.hpp>
-#include <boost/throw_exception.hpp>
-#include <boost/detail/lightweight_mutex.hpp>
-
-#include <functional>       // for std::less
-#include <exception>        // for std::exception
-#include <new>              // for std::bad_alloc
-
 #ifdef __BORLANDC__
-# pragma warn -8026     // Functions with excep. spec. are not expanded inline
 # pragma warn -8027     // Functions containing try are not expanded inline
 #endif

+#include <boost/config.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/detail/bad_weak_ptr.hpp>
+#include <boost/detail/sp_counted_base.hpp>
+#include <boost/detail/sp_counted_impl.hpp>
+// In order to avoid circular dependencies with Boost.TR1
+// we make sure that our include of <memory> doesn't try to
+// pull in the TR1 headers: that's why we use this header 
+// rather than including <memory> directly:
+#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
+#include <functional>       // std::less
+#include <new>              // std::bad_alloc
+
 namespace boost
 {

-// The standard library that comes with Borland C++ 5.5.1
-// defines std::exception and its members as having C calling
-// convention (-pc). When the definition of use_count_is_zero
-// is compiled with -ps, the compiler issues an error.
-// Hence, the temporary #pragma option -pc below. The version
-// check is deliberately conservative.
-
-#if defined(__BORLANDC__) && __BORLANDC__ == 0x551
-# pragma option push -pc
-#endif
-
-class use_count_is_zero: public std::exception
-{
-public:
-
-    virtual char const * what() const throw()
-    {
-        return "boost::use_count_is_zero";
-    }
-};
-
-#if defined(__BORLANDC__) && __BORLANDC__ == 0x551
-# pragma option pop
-#endif
-
-class counted_base
-{
-private:
-
-    typedef detail::lightweight_mutex mutex_type;
-
-public:
-
-    counted_base():
-        use_count_(0), weak_count_(0)
-    {
-    }
-
-    // pre: initial_use_count <= initial_weak_count
-
-    explicit counted_base(long initial_use_count, long initial_weak_count):
-        use_count_(initial_use_count), weak_count_(initial_weak_count)
-    {
-    }
-
-    virtual ~counted_base() // nothrow
-    {
-    }
-
-    // dispose() is called when use_count_ drops to zero, to release
-    // the resources managed by *this.
-    //
-    // counted_base doesn't manage any resources except itself, and
-    // the default implementation is a no-op.
-    //
-    // dispose() is not pure virtual since weak_ptr instantiates a
-    // counted_base in its default constructor.
-
-    virtual void dispose() // nothrow
-    {
-    }
-
-    // destruct() is called when weak_count_ drops to zero.
-
-    virtual void destruct() // nothrow
-    {
-        delete this;
-    }
-
-    void add_ref()
-    {
-#ifdef BOOST_HAS_THREADS
-        mutex_type::scoped_lock lock(mtx_);
-#endif
-        if(use_count_ == 0 && weak_count_ != 0) boost::throw_exception(boost::use_count_is_zero());
-        ++use_count_;
-        ++weak_count_;
-    }
-
-    void release() // nothrow
-    {
-        long new_use_count;
-        long new_weak_count;
-
-        {
-#ifdef BOOST_HAS_THREADS
-            mutex_type::scoped_lock lock(mtx_);
-#endif
-            new_use_count = --use_count_;
-            new_weak_count = --weak_count_;
-        }
-
-        if(new_use_count == 0)
-        {
-            dispose();
-        }
-
-        if(new_weak_count == 0)
-        {
-            destruct();
-        }
-    }
-
-    void weak_add_ref() // nothrow
-    {
-#ifdef BOOST_HAS_THREADS
-        mutex_type::scoped_lock lock(mtx_);
-#endif
-        ++weak_count_;
-    }
-
-    void weak_release() // nothrow
-    {
-        long new_weak_count;
-
-        {
-#ifdef BOOST_HAS_THREADS
-            mutex_type::scoped_lock lock(mtx_);
-#endif
-            new_weak_count = --weak_count_;
-        }
-
-        if(new_weak_count == 0)
-        {
-            destruct();
-        }
-    }
-
-    long use_count() const // nothrow
-    {
-#ifdef BOOST_HAS_THREADS
-        mutex_type::scoped_lock lock(mtx_);
-#endif
-        return use_count_;
-    }
-
-private:
-
-    counted_base(counted_base const &);
-    counted_base & operator= (counted_base const &);
-
-    // inv: use_count_ <= weak_count_
-
-    long use_count_;
-    long weak_count_;
-
-#ifdef BOOST_HAS_THREADS
-    mutable mutex_type mtx_;
-#endif
-};
-
-inline void intrusive_ptr_add_ref(counted_base * p)
-{
-    p->add_ref();
-}
-
-inline void intrusive_ptr_release(counted_base * p)
-{
-    p->release();
-}
-
 namespace detail
 {

-//
-// Borland's Codeguard trips up over the -Vx- option here:
-//
-#ifdef __CODEGUARD__
-#pragma option push -Vx-
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+int const shared_count_id = 0x2C35F101;
+int const   weak_count_id = 0x298C38A4;
+
 #endif

-template<class P, class D> class counted_base_impl: public counted_base
-{
-private:
-
-    P ptr; // copy constructor must not throw
-    D del; // copy constructor must not throw
-
-    counted_base_impl(counted_base_impl const &);
-    counted_base_impl & operator= (counted_base_impl const &);
-
-public:
-
-    // pre: initial_use_count <= initial_weak_count, d(p) must not throw
-
-    counted_base_impl(P p, D d, long initial_use_count, long initial_weak_count):
-        counted_base(initial_use_count, initial_weak_count), ptr(p), del(d)
-    {
-    }
-
-    virtual void dispose() // nothrow
-    {
-        del(ptr);
-    }
-};
+struct sp_nothrow_tag {};

 class weak_count;

@@ -240,30 +57,70 @@ class shared_count
 {
 private:

-    counted_base * pi_;
+    sp_counted_base * pi_;
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+    int id_;
+#endif

    friend class weak_count;

-    template<class P, class D> shared_count(P, D, counted_base const *);
-
 public:

-    shared_count(): pi_(new counted_base(1, 1))
+    shared_count(): pi_(0) // nothrow
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
    }

-    explicit shared_count(counted_base * pi): pi_(pi) // never throws
-    {
-        pi_->add_ref();
-    }
-
-    template<class P, class D> shared_count(P p, D d, void const * = 0): pi_(0)
+    template<class Y> explicit shared_count( Y * p ): pi_( 0 )
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
 #ifndef BOOST_NO_EXCEPTIONS

        try
        {
-            pi_ = new counted_base_impl<P, D>(p, d, 1, 1);
+            pi_ = new sp_counted_impl_p<Y>( p );
+        }
+        catch(...)
+        {
+            boost::checked_delete( p );
+            throw;
+        }
+
+#else
+
+        pi_ = new sp_counted_impl_p<Y>( p );
+
+        if( pi_ == 0 )
+        {
+            boost::checked_delete( p );
+            boost::throw_exception( std::bad_alloc() );
+        }
+
+#endif
+    }
+
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 )
+    template<class Y, class D> shared_count( Y * p, D d ): pi_(0)
+#else
+    template<class P, class D> shared_count( P p, D d ): pi_(0)
+#endif
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
+    {
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 )
+        typedef Y* P;
+#endif
+#ifndef BOOST_NO_EXCEPTIONS
+
+        try
+        {
+            pi_ = new sp_counted_impl_pd<P, D>(p, d);
        }
        catch(...)
        {
@@ -273,7 +130,7 @@ public:

 #else

-        pi_ = new counted_base_impl<P, D>(p, d, 1, 1);
+        pi_ = new sp_counted_impl_pd<P, D>(p, d);

        if(pi_ == 0)
        {
@@ -284,18 +141,71 @@ public:
 #endif
    }

-    template<class P, class D> shared_count(P, D, counted_base * pi): pi_(pi)
+    template<class P, class D, class A> shared_count( P p, D d, A a ): pi_( 0 )
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
-        pi_->add_ref();
+        typedef sp_counted_impl_pda<P, D, A> impl_type;
+        typedef typename A::template rebind< impl_type >::other A2;
+
+        A2 a2( a );
+
+#ifndef BOOST_NO_EXCEPTIONS
+
+        try
+        {
+            pi_ = a2.allocate( 1, static_cast< impl_type* >( 0 ) );
+            new( static_cast< void* >( pi_ ) ) impl_type( p, d, a );
+        }
+        catch(...)
+        {
+            d( p );
+
+            if( pi_ != 0 )
+            {
+                a2.deallocate( static_cast< impl_type* >( pi_ ), 1 );
+            }
+
+            throw;
+        }
+
+#else
+
+        pi_ = a2.allocate( 1, static_cast< impl_type* >( 0 ) );
+
+        if( pi_ != 0 )
+        {
+            new( static_cast< void* >( pi_ ) ) impl_type( p, d, a );
+        }
+        else
+        {
+            d( p );
+            boost::throw_exception( std::bad_alloc() );
+        }
+
+#endif
    }

 #ifndef BOOST_NO_AUTO_PTR

    // auto_ptr<Y> is special cased to provide the strong guarantee

-    template<typename Y>
-    explicit shared_count(std::auto_ptr<Y> & r): pi_(new counted_base_impl< Y *, checked_deleter<Y> >(r.get(), checked_deleter<Y>(), 1, 1))
+    template<class Y>
+    explicit shared_count( std::auto_ptr<Y> & r ): pi_( new sp_counted_impl_p<Y>( r.get() ) )
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
+#ifdef BOOST_NO_EXCEPTIONS
+
+        if( pi_ == 0 )
+        {
+            boost::throw_exception(std::bad_alloc());
+        }
+
+#endif
+
        r.release();
    }

@@ -303,41 +213,57 @@ public:

    ~shared_count() // nothrow
    {
-        pi_->release();
+        if( pi_ != 0 ) pi_->release();
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        id_ = 0;
+#endif
    }

    shared_count(shared_count const & r): pi_(r.pi_) // nothrow
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
-        pi_->add_ref();
+        if( pi_ != 0 ) pi_->add_ref_copy();
    }

-    explicit shared_count(weak_count const & r); // throws use_count_is_zero when r.use_count() == 0
+    explicit shared_count(weak_count const & r); // throws bad_weak_ptr when r.use_count() == 0
+    shared_count( weak_count const & r, sp_nothrow_tag ); // constructs an empty *this when r.use_count() == 0

    shared_count & operator= (shared_count const & r) // nothrow
    {
-        counted_base * tmp = r.pi_;
-        tmp->add_ref();
-        pi_->release();
-        pi_ = tmp;
+        sp_counted_base * tmp = r.pi_;
+
+        if( tmp != pi_ )
+        {
+            if( tmp != 0 ) tmp->add_ref_copy();
+            if( pi_ != 0 ) pi_->release();
+            pi_ = tmp;
+        }

        return *this;
    }

    void swap(shared_count & r) // nothrow
    {
-        counted_base * tmp = r.pi_;
+        sp_counted_base * tmp = r.pi_;
        r.pi_ = pi_;
        pi_ = tmp;
    }

    long use_count() const // nothrow
    {
-        return pi_->use_count();
+        return pi_ != 0? pi_->use_count(): 0;
    }

    bool unique() const // nothrow
    {
-        return pi_->use_count() == 1;
+        return use_count() == 1;
+    }
+
+    bool empty() const // nothrow
+    {
+        return pi_ == 0;
    }

    friend inline bool operator==(shared_count const & a, shared_count const & b)
@@ -347,74 +273,99 @@ public:

    friend inline bool operator<(shared_count const & a, shared_count const & b)
    {
-        return std::less<counted_base *>()(a.pi_, b.pi_);
+        return std::less<sp_counted_base *>()( a.pi_, b.pi_ );
+    }
+
+    void * get_deleter( sp_typeinfo const & ti ) const
+    {
+        return pi_? pi_->get_deleter( ti ): 0;
    }
 };

-#ifdef __CODEGUARD__
-#pragma option pop
-#endif
-

 class weak_count
 {
 private:

-    counted_base * pi_;
+    sp_counted_base * pi_;
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+    int id_;
+#endif

    friend class shared_count;

 public:

-    weak_count(): pi_(new counted_base(0, 1)) // can throw
+    weak_count(): pi_(0) // nothrow
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(weak_count_id)
+#endif
    {
    }

    weak_count(shared_count const & r): pi_(r.pi_) // nothrow
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
-        pi_->weak_add_ref();
+        if(pi_ != 0) pi_->weak_add_ref();
    }

    weak_count(weak_count const & r): pi_(r.pi_) // nothrow
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
    {
-        pi_->weak_add_ref();
+        if(pi_ != 0) pi_->weak_add_ref();
    }

    ~weak_count() // nothrow
    {
-        pi_->weak_release();
+        if(pi_ != 0) pi_->weak_release();
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        id_ = 0;
+#endif
    }

    weak_count & operator= (shared_count const & r) // nothrow
    {
-        counted_base * tmp = r.pi_;
-        tmp->weak_add_ref();
-        pi_->weak_release();
-        pi_ = tmp;
+        sp_counted_base * tmp = r.pi_;
+
+        if( tmp != pi_ )
+        {
+            if(tmp != 0) tmp->weak_add_ref();
+            if(pi_ != 0) pi_->weak_release();
+            pi_ = tmp;
+        }

        return *this;
    }

    weak_count & operator= (weak_count const & r) // nothrow
    {
-        counted_base * tmp = r.pi_;
-        tmp->weak_add_ref();
-        pi_->weak_release();
-        pi_ = tmp;
+        sp_counted_base * tmp = r.pi_;
+
+        if( tmp != pi_ )
+        {
+            if(tmp != 0) tmp->weak_add_ref();
+            if(pi_ != 0) pi_->weak_release();
+            pi_ = tmp;
+        }

        return *this;
    }

    void swap(weak_count & r) // nothrow
    {
-        counted_base * tmp = r.pi_;
+        sp_counted_base * tmp = r.pi_;
        r.pi_ = pi_;
        pi_ = tmp;
    }

    long use_count() const // nothrow
    {
-        return pi_->use_count();
+        return pi_ != 0? pi_->use_count(): 0;
    }

    friend inline bool operator==(weak_count const & a, weak_count const & b)
@@ -424,13 +375,30 @@ public:

    friend inline bool operator<(weak_count const & a, weak_count const & b)
    {
-        return std::less<counted_base *>()(a.pi_, b.pi_);
+        return std::less<sp_counted_base *>()(a.pi_, b.pi_);
    }
 };

-inline shared_count::shared_count(weak_count const & r): pi_(r.pi_)
+inline shared_count::shared_count( weak_count const & r ): pi_( r.pi_ )
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
 {
-    pi_->add_ref();
+    if( pi_ == 0 || !pi_->add_ref_lock() )
+    {
+        boost::throw_exception( boost::bad_weak_ptr() );
+    }
+}
+
+inline shared_count::shared_count( weak_count const & r, sp_nothrow_tag ): pi_( r.pi_ )
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        , id_(shared_count_id)
+#endif
+{
+    if( pi_ != 0 && !pi_->add_ref_lock() )
+    {
+        pi_ = 0;
+    }
 }

 } // namespace detail
@@ -439,7 +407,6 @@ inline shared_count::shared_count(weak_count const & r): pi_(r.pi_)

 #ifdef __BORLANDC__
 # pragma warn .8027     // Functions containing try are not expanded inline
-# pragma warn .8026     // Functions with excep. spec. are not expanded inline
 #endif

 #endif  // #ifndef BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED
--- a/include/boost/detail/shared_ptr_nmt.hpp
+++ b/include/boost/detail/shared_ptr_nmt.hpp
@@ -7,10 +7,9 @@
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/shared_ptr.htm for documentation.
 //
--- a/include/boost/detail/sp_convertible.hpp
+++ b/include/boost/detail/sp_convertible.hpp
@@ -0,0 +1,76 @@
+#ifndef BOOST_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED
+#define BOOST_DETAIL_SP_CONVERTIBLE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_convertible.hpp
+//
+//  Copyright 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( BOOST_NO_SFINAE )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ < 303 )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __BORLANDC__ ) && ( __BORLANDC__ <= 0x610 )
+# define BOOST_SP_NO_SP_CONVERTIBLE
+#endif
+
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+namespace boost
+{
+
+namespace detail
+{
+
+template< class Y, class T > struct sp_convertible
+{
+    typedef char (&yes) [1];
+    typedef char (&no)  [2];
+
+    static yes f( T* );
+    static no  f( ... );
+
+    enum _vt { value = sizeof( f( (Y*)0 ) ) == sizeof(yes) };
+};
+
+struct sp_empty
+{
+};
+
+template< bool > struct sp_enable_if_convertible_impl;
+
+template<> struct sp_enable_if_convertible_impl<true>
+{
+    typedef sp_empty type;
+};
+
+template<> struct sp_enable_if_convertible_impl<false>
+{
+};
+
+template< class Y, class T > struct sp_enable_if_convertible: public sp_enable_if_convertible_impl< sp_convertible< Y, T >::value >
+{
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+#endif  // #ifndef BOOST_DETAIL_SP_TYPEINFO_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base.hpp
+++ b/include/boost/detail/sp_counted_base.hpp
@@ -0,0 +1,66 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base.hpp
+//
+//  Copyright 2005, 2006 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/config.hpp>
+
+#if defined( BOOST_SP_DISABLE_THREADS )
+# include <boost/detail/sp_counted_base_nt.hpp>
+
+#elif defined( BOOST_SP_USE_SPINLOCK )
+# include <boost/detail/sp_counted_base_spin.hpp>
+
+#elif defined( BOOST_SP_USE_PTHREADS )
+# include <boost/detail/sp_counted_base_pt.hpp>
+
+#elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
+# include <boost/detail/sp_counted_base_nt.hpp>
+
+#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) )
+# include <boost/detail/sp_counted_base_gcc_x86.hpp>
+
+#elif defined( __GNUC__ ) && defined( __ia64__ ) && !defined( __INTEL_COMPILER )
+# include <boost/detail/sp_counted_base_gcc_ia64.hpp>
+
+#elif defined(__HP_aCC) && defined(__ia64)
+# include <boost/detail/sp_counted_base_acc_ia64.hpp>
+
+#elif defined( __MWERKS__ ) && defined( __POWERPC__ )
+# include <boost/detail/sp_counted_base_cw_ppc.hpp>
+
+#elif defined( __GNUC__ ) && ( defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc ) )
+# include <boost/detail/sp_counted_base_gcc_ppc.hpp>
+
+#elif defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+# include <boost/detail/sp_counted_base_sync.hpp>
+
+#elif defined(__GNUC__) && ( defined( __sparcv9 ) || ( defined( __sparcv8 ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 402 ) ) )
+# include <boost/detail/sp_counted_base_gcc_sparc.hpp>
+
+#elif defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ )
+# include <boost/detail/sp_counted_base_w32.hpp>
+
+#elif !defined( BOOST_HAS_THREADS )
+# include <boost/detail/sp_counted_base_nt.hpp>
+
+#else
+# include <boost/detail/sp_counted_base_spin.hpp>
+
+#endif
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_acc_ia64.hpp
+++ b/include/boost/detail/sp_counted_base_acc_ia64.hpp
@@ -0,0 +1,150 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_ACC_IA64_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_ACC_IA64_HPP_INCLUDED
+
+//
+//  detail/sp_counted_base_acc_ia64.hpp - aC++ on HP-UX IA64
+//
+//  Copyright 2007 Baruch Zilber
+//  Copyright 2007 Boris Gubenko
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <machine/sys/inline.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( int * pw )
+{
+    // ++*pw;
+
+    _Asm_fetchadd(_FASZ_W, _SEM_REL, pw, +1, _LDHINT_NONE);
+} 
+
+inline int atomic_decrement( int * pw )
+{
+    // return --*pw;
+
+    int r = static_cast<int>(_Asm_fetchadd(_FASZ_W, _SEM_REL, pw, -1, _LDHINT_NONE));
+    if (1 == r)
+    {
+        _Asm_mf();
+    }
+    
+    return r - 1;
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    // if( *pw != 0 ) ++*pw;
+    // return *pw;
+
+    int v = *pw;
+    
+    for (;;)
+    {
+        if (0 == v)
+        {
+            return 0;
+        }
+        
+        _Asm_mov_to_ar(_AREG_CCV,
+                       v,
+                       (_UP_CALL_FENCE | _UP_SYS_FENCE | _DOWN_CALL_FENCE | _DOWN_SYS_FENCE));
+        int r = static_cast<int>(_Asm_cmpxchg(_SZ_W, _SEM_ACQ, pw, v + 1, _LDHINT_NONE));
+        if (r == v)
+        {
+            return r + 1;
+        }
+        
+        v = r;
+    }
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<int const volatile &>( use_count_ ); // TODO use ld.acq here
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_ACC_IA64_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_cw_ppc.hpp
+++ b/include/boost/detail/sp_counted_base_cw_ppc.hpp
@@ -0,0 +1,170 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_CW_PPC_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_CW_PPC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_cw_ppc.hpp - CodeWarrior on PowerPC
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( register long * pw )
+{
+    register int a;
+
+    asm
+    {
+loop:
+
+    lwarx   a, 0, pw
+    addi    a, a, 1
+    stwcx.  a, 0, pw
+    bne-    loop
+    }
+}
+
+inline long atomic_decrement( register long * pw )
+{
+    register int a;
+
+    asm
+    {
+    sync
+
+loop:
+
+    lwarx   a, 0, pw
+    addi    a, a, -1
+    stwcx.  a, 0, pw
+    bne-    loop
+
+    isync
+    }
+
+    return a;
+}
+
+inline long atomic_conditional_increment( register long * pw )
+{
+    register int a;
+
+    asm
+    {
+loop:
+
+    lwarx   a, 0, pw
+    cmpwi   a, 0
+    beq     store
+
+    addi    a, a, 1
+
+store:
+
+    stwcx.  a, 0, pw
+    bne-    loop
+    }
+
+    return a;
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    long use_count_;        // #shared
+    long weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<long const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_CW_PPC_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_cw_x86.hpp
+++ b/include/boost/detail/sp_counted_base_cw_x86.hpp
@@ -0,0 +1,158 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_cw_x86.hpp - CodeWarrion on 486+
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//  Copyright 2005 Rene Rivera
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline int atomic_exchange_and_add( int * pw, int dv )
+{
+    // int r = *pw;
+    // *pw += dv;
+    // return r;
+
+    asm
+    {
+        mov esi, [pw]
+        mov eax, dv
+        lock xadd dword ptr [esi], eax
+    }
+}
+
+inline void atomic_increment( int * pw )
+{
+    //atomic_exchange_and_add( pw, 1 );
+
+    asm
+    {
+        mov esi, [pw]
+        lock inc dword ptr [esi]
+    }
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    // int rv = *pw;
+    // if( rv != 0 ) ++*pw;
+    // return rv;
+
+    asm
+    {
+        mov esi, [pw]
+        mov eax, dword ptr [esi]
+    L0:
+        test eax, eax
+        je L1
+        mov ebx, eax
+        inc ebx
+        lock cmpxchg dword ptr [esi], ebx
+        jne L0
+    L1:
+    }
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_exchange_and_add( &use_count_, -1 ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<int const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_gcc_ia64.hpp
+++ b/include/boost/detail/sp_counted_base_gcc_ia64.hpp
@@ -0,0 +1,157 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED
+
+//
+//  detail/sp_counted_base_gcc_ia64.hpp - g++ on IA64
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2006 Peter Dimov
+//  Copyright 2005 Ben Hutchings
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( int * pw )
+{
+    // ++*pw;
+
+    int tmp;
+
+    // No barrier is required here but fetchadd always has an acquire or
+    // release barrier associated with it.  We choose release as it should be
+    // cheaper.
+    __asm__ ("fetchadd4.rel %0=%1,1" :
+         "=r"(tmp), "=m"(*pw) :
+         "m"( *pw ));
+}
+
+inline int atomic_decrement( int * pw )
+{
+    // return --*pw;
+
+    int rv;
+
+    __asm__ ("     fetchadd4.rel %0=%1,-1 ;; \n"
+             "     cmp.eq        p7,p0=1,%0 ;; \n"
+             "(p7) ld4.acq       %0=%1    " :
+             "=&r"(rv), "=m"(*pw) :
+             "m"( *pw ) :
+             "p7");
+
+    return rv;
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    // if( *pw != 0 ) ++*pw;
+    // return *pw;
+
+    int rv, tmp, tmp2;
+
+    __asm__ ("0:   ld4          %0=%3           ;; \n"
+         "     cmp.eq       p7,p0=0,%0        ;; \n"
+         "(p7) br.cond.spnt 1f                \n"
+         "     mov          ar.ccv=%0         \n"
+         "     add          %1=1,%0           ;; \n"
+         "     cmpxchg4.acq %2=%3,%1,ar.ccv ;; \n"
+         "     cmp.ne       p7,p0=%0,%2       ;; \n"
+         "(p7) br.cond.spnt 0b                \n"
+         "     mov          %0=%1             ;; \n"
+         "1:" : 
+         "=&r"(rv), "=&r"(tmp), "=&r"(tmp2), "=m"(*pw) :
+         "m"( *pw ) :
+         "ar.ccv", "p7");
+
+    return rv;
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<int const volatile &>( use_count_ ); // TODO use ld.acq here
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_gcc_ppc.hpp
+++ b/include/boost/detail/sp_counted_base_gcc_ppc.hpp
@@ -0,0 +1,181 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_PPC_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_GCC_PPC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_gcc_ppc.hpp - g++ on PowerPC
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( int * pw )
+{
+    // ++*pw;
+
+    int tmp;
+
+    __asm__
+    (
+        "0:\n\t"
+        "lwarx %1, 0, %2\n\t"
+        "addi %1, %1, 1\n\t"
+        "stwcx. %1, 0, %2\n\t"
+        "bne- 0b":
+
+        "=m"( *pw ), "=&b"( tmp ):
+        "r"( pw ), "m"( *pw ):
+        "cc"
+    );
+}
+
+inline int atomic_decrement( int * pw )
+{
+    // return --*pw;
+
+    int rv;
+
+    __asm__ __volatile__
+    (
+        "sync\n\t"
+        "0:\n\t"
+        "lwarx %1, 0, %2\n\t"
+        "addi %1, %1, -1\n\t"
+        "stwcx. %1, 0, %2\n\t"
+        "bne- 0b\n\t"
+        "isync":
+
+        "=m"( *pw ), "=&b"( rv ):
+        "r"( pw ), "m"( *pw ):
+        "memory", "cc"
+    );
+
+    return rv;
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    // if( *pw != 0 ) ++*pw;
+    // return *pw;
+
+    int rv;
+
+    __asm__
+    (
+        "0:\n\t"
+        "lwarx %1, 0, %2\n\t"
+        "cmpwi %1, 0\n\t"
+        "beq 1f\n\t"
+        "addi %1, %1, 1\n\t"
+        "1:\n\t"
+        "stwcx. %1, 0, %2\n\t"
+        "bne- 0b":
+
+        "=m"( *pw ), "=&b"( rv ):
+        "r"( pw ), "m"( *pw ):
+        "cc"
+    );
+
+    return rv;
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<int const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_PPC_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_gcc_sparc.hpp
+++ b/include/boost/detail/sp_counted_base_gcc_sparc.hpp
@@ -0,0 +1,166 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+
+//
+//  Copyright (c) 2006 Piotr Wyderski
+//  Copyright (c) 2006 Tomas Puverle
+//  Copyright (c) 2006 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+//
+//  Thanks to Michael van der Westhuizen
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <inttypes.h> // int32_t
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline int32_t compare_and_swap( int32_t * dest_, int32_t compare_, int32_t swap_ )
+{
+    __asm__ __volatile__( "cas %0, %2, %1"
+                        : "+m" (*dest_), "+r" (swap_)
+                        : "r" (compare_)
+                        : "memory" );
+
+    return swap_;
+}
+
+inline int32_t atomic_fetch_and_add( int32_t * pw, int32_t dv )
+{
+    // long r = *pw;
+    // *pw += dv;
+    // return r;
+
+    for( ;; )
+    {
+        int32_t r = *pw;
+
+        if( __builtin_expect((compare_and_swap(pw, r, r + dv) == r), 1) )
+        {
+            return r;
+        }
+    }
+}
+
+inline void atomic_increment( int32_t * pw )
+{
+    atomic_fetch_and_add( pw, 1 );
+}
+
+inline int32_t atomic_decrement( int32_t * pw )
+{
+    return atomic_fetch_and_add( pw, -1 );
+}
+
+inline int32_t atomic_conditional_increment( int32_t * pw )
+{
+    // long r = *pw;
+    // if( r != 0 ) ++*pw;
+    // return r;
+
+    for( ;; )
+    {
+        int32_t r = *pw;
+
+        if( r == 0 )
+        {
+            return r;
+        }
+
+        if( __builtin_expect( ( compare_and_swap( pw, r, r + 1 ) == r ), 1 ) )
+        {
+            return r;
+        }
+    }    
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int32_t use_count_;        // #shared
+    int32_t weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return const_cast< int32_t const volatile & >( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_gcc_x86.hpp
+++ b/include/boost/detail/sp_counted_base_gcc_x86.hpp
@@ -0,0 +1,173 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_gcc_x86.hpp - g++ on 486+ or AMD64
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline int atomic_exchange_and_add( int * pw, int dv )
+{
+    // int r = *pw;
+    // *pw += dv;
+    // return r;
+
+    int r;
+
+    __asm__ __volatile__
+    (
+        "lock\n\t"
+        "xadd %1, %0":
+        "=m"( *pw ), "=r"( r ): // outputs (%0, %1)
+        "m"( *pw ), "1"( dv ): // inputs (%2, %3 == %1)
+        "memory", "cc" // clobbers
+    );
+
+    return r;
+}
+
+inline void atomic_increment( int * pw )
+{
+    //atomic_exchange_and_add( pw, 1 );
+
+    __asm__
+    (
+        "lock\n\t"
+        "incl %0":
+        "=m"( *pw ): // output (%0)
+        "m"( *pw ): // input (%1)
+        "cc" // clobbers
+    );
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    // int rv = *pw;
+    // if( rv != 0 ) ++*pw;
+    // return rv;
+
+    int rv, tmp;
+
+    __asm__
+    (
+        "movl %0, %%eax\n\t"
+        "0:\n\t"
+        "test %%eax, %%eax\n\t"
+        "je 1f\n\t"
+        "movl %%eax, %2\n\t"
+        "incl %2\n\t"
+        "lock\n\t"
+        "cmpxchgl %2, %0\n\t"
+        "jne 0b\n\t"
+        "1:":
+        "=m"( *pw ), "=&a"( rv ), "=&r"( tmp ): // outputs (%0, %1, %2)
+        "m"( *pw ): // input (%3)
+        "cc" // clobbers
+    );
+
+    return rv;
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_exchange_and_add( &use_count_, -1 ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<int const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_nt.hpp
+++ b/include/boost/detail/sp_counted_base_nt.hpp
@@ -0,0 +1,107 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_nt.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    long use_count_;        // #shared
+    long weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        ++use_count_;
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        if( use_count_ == 0 ) return false;
+        ++use_count_;
+        return true;
+    }
+
+    void release() // nothrow
+    {
+        if( --use_count_ == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        ++weak_count_;
+    }
+
+    void weak_release() // nothrow
+    {
+        if( --weak_count_ == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return use_count_;
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_NT_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_pt.hpp
+++ b/include/boost/detail/sp_counted_base_pt.hpp
@@ -0,0 +1,135 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_PT_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_PT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_pt.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <pthread.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    long use_count_;        // #shared
+    long weak_count_;       // #weak + (#shared != 0)
+
+    mutable pthread_mutex_t m_;
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
+
+#if defined(__hpux) && defined(_DECTHREADS_)
+        pthread_mutex_init( &m_, pthread_mutexattr_default );
+#else
+        pthread_mutex_init( &m_, 0 );
+#endif
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+        pthread_mutex_destroy( &m_ );
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        pthread_mutex_lock( &m_ );
+        ++use_count_;
+        pthread_mutex_unlock( &m_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        pthread_mutex_lock( &m_ );
+        bool r = use_count_ == 0? false: ( ++use_count_, true );
+        pthread_mutex_unlock( &m_ );
+        return r;
+    }
+
+    void release() // nothrow
+    {
+        pthread_mutex_lock( &m_ );
+        long new_use_count = --use_count_;
+        pthread_mutex_unlock( &m_ );
+
+        if( new_use_count == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        pthread_mutex_lock( &m_ );
+        ++weak_count_;
+        pthread_mutex_unlock( &m_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        pthread_mutex_lock( &m_ );
+        long new_weak_count = --weak_count_;
+        pthread_mutex_unlock( &m_ );
+
+        if( new_weak_count == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        pthread_mutex_lock( &m_ );
+        long r = use_count_;
+        pthread_mutex_unlock( &m_ );
+
+        return r;
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_PT_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_solaris.hpp
+++ b/include/boost/detail/sp_counted_base_solaris.hpp
@@ -0,0 +1,113 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
+
+//
+//  detail/sp_counted_base_solaris.hpp
+//   based on: detail/sp_counted_base_w32.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//  Copyright 2006 Michael van der Westhuizen
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <atomic.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    uint32_t use_count_;        // #shared
+    uint32_t weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_inc_32( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        for( ;; )
+        {
+            uint32_t tmp = static_cast< uint32_t const volatile& >( use_count_ );
+            if( tmp == 0 ) return false;
+            if( atomic_cas_32( &use_count_, tmp, tmp + 1 ) == tmp ) return true;
+        }
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_dec_32_nv( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_inc_32( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_dec_32_nv( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<long const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_spin.hpp
+++ b/include/boost/detail/sp_counted_base_spin.hpp
@@ -0,0 +1,131 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_SPIN_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_SPIN_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_spin.hpp - spinlock pool atomic emulation
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <boost/detail/spinlock_pool.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline int atomic_exchange_and_add( int * pw, int dv )
+{
+    spinlock_pool<1>::scoped_lock lock( pw );
+
+    int r = *pw;
+    *pw += dv;
+    return r;
+}
+
+inline void atomic_increment( int * pw )
+{
+    spinlock_pool<1>::scoped_lock lock( pw );
+    ++*pw;
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+    spinlock_pool<1>::scoped_lock lock( pw );
+
+    int rv = *pw;
+    if( rv != 0 ) ++*pw;
+    return rv;
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    int use_count_;        // #shared
+    int weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_exchange_and_add( &use_count_, -1 ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        spinlock_pool<1>::scoped_lock lock( &use_count_ );
+        return use_count_;
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_SPIN_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_sync.hpp
+++ b/include/boost/detail/sp_counted_base_sync.hpp
@@ -0,0 +1,155 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_SYNC_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_SYNC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_counted_base_sync.hpp - g++ 4.1+ __sync intrinsics
+//
+//  Copyright (c) 2007 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/detail/sp_typeinfo.hpp>
+#include <limits.h>
+
+#if defined( __ia64__ ) && defined( __INTEL_COMPILER )
+# include <ia64intrin.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+#if INT_MAX >= 2147483647
+
+typedef int sp_int32_t;
+
+#else
+
+typedef long sp_int32_t;
+
+#endif
+
+inline void atomic_increment( sp_int32_t * pw )
+{
+    __sync_fetch_and_add( pw, 1 );
+}
+
+inline sp_int32_t atomic_decrement( sp_int32_t * pw )
+{
+    return __sync_fetch_and_add( pw, -1 );
+}
+
+inline sp_int32_t atomic_conditional_increment( sp_int32_t * pw )
+{
+    // long r = *pw;
+    // if( r != 0 ) ++*pw;
+    // return r;
+
+    sp_int32_t r = *pw;
+
+    for( ;; )
+    {
+        if( r == 0 )
+        {
+            return r;
+        }
+
+        sp_int32_t r2 = __sync_val_compare_and_swap( pw, r, r + 1 );
+
+        if( r2 == r )
+        {
+            return r;
+        }
+        else
+        {
+            r = r2;
+        }
+    }    
+}
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    sp_int32_t use_count_;        // #shared
+    sp_int32_t weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return const_cast< sp_int32_t const volatile & >( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_SYNC_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_base_w32.hpp
+++ b/include/boost/detail/sp_counted_base_w32.hpp
@@ -0,0 +1,130 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_base_w32.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+//  Lock-free algorithm by Alexander Terekhov
+//
+//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
+//  formulation
+//
+
+#include <boost/detail/interlocked.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    long use_count_;        // #shared
+    long weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
+
+    void add_ref_copy()
+    {
+        BOOST_INTERLOCKED_INCREMENT( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        for( ;; )
+        {
+            long tmp = static_cast< long const volatile& >( use_count_ );
+            if( tmp == 0 ) return false;
+
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, == 1200 )
+
+            // work around a code generation bug
+
+            long tmp2 = tmp + 1;
+            if( BOOST_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp2, tmp ) == tmp2 - 1 ) return true;
+
+#else
+
+            if( BOOST_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp + 1, tmp ) == tmp ) return true;
+
+#endif
+        }
+    }
+
+    void release() // nothrow
+    {
+        if( BOOST_INTERLOCKED_DECREMENT( &use_count_ ) == 0 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        BOOST_INTERLOCKED_INCREMENT( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( BOOST_INTERLOCKED_DECREMENT( &weak_count_ ) == 0 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return static_cast<long const volatile &>( use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
--- a/include/boost/detail/sp_counted_impl.hpp
+++ b/include/boost/detail/sp_counted_impl.hpp
@@ -0,0 +1,231 @@
+#ifndef BOOST_DETAIL_SP_COUNTED_IMPL_HPP_INCLUDED
+#define BOOST_DETAIL_SP_COUNTED_IMPL_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  detail/sp_counted_impl.hpp
+//
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+//  Copyright 2004-2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/config.hpp>
+
+#if defined(BOOST_SP_USE_STD_ALLOCATOR) && defined(BOOST_SP_USE_QUICK_ALLOCATOR)
+# error BOOST_SP_USE_STD_ALLOCATOR and BOOST_SP_USE_QUICK_ALLOCATOR are incompatible.
+#endif
+
+#include <boost/checked_delete.hpp>
+#include <boost/detail/sp_counted_base.hpp>
+
+#if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
+#include <boost/detail/quick_allocator.hpp>
+#endif
+
+#if defined(BOOST_SP_USE_STD_ALLOCATOR)
+#include <memory>           // std::allocator
+#endif
+
+#include <cstddef>          // std::size_t
+
+namespace boost
+{
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+void sp_scalar_constructor_hook( void * px, std::size_t size, void * pn );
+void sp_scalar_destructor_hook( void * px, std::size_t size, void * pn );
+
+#endif
+
+namespace detail
+{
+
+template<class X> class sp_counted_impl_p: public sp_counted_base
+{
+private:
+
+    X * px_;
+
+    sp_counted_impl_p( sp_counted_impl_p const & );
+    sp_counted_impl_p & operator= ( sp_counted_impl_p const & );
+
+    typedef sp_counted_impl_p<X> this_type;
+
+public:
+
+    explicit sp_counted_impl_p( X * px ): px_( px )
+    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_constructor_hook( px, sizeof(X), this );
+#endif
+    }
+
+    virtual void dispose() // nothrow
+    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_destructor_hook( px_, sizeof(X), this );
+#endif
+        boost::checked_delete( px_ );
+    }
+
+    virtual void * get_deleter( detail::sp_typeinfo const & )
+    {
+        return 0;
+    }
+
+#if defined(BOOST_SP_USE_STD_ALLOCATOR)
+
+    void * operator new( std::size_t )
+    {
+        return std::allocator<this_type>().allocate( 1, static_cast<this_type *>(0) );
+    }
+
+    void operator delete( void * p )
+    {
+        std::allocator<this_type>().deallocate( static_cast<this_type *>(p), 1 );
+    }
+
+#endif
+
+#if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
+
+    void * operator new( std::size_t )
+    {
+        return quick_allocator<this_type>::alloc();
+    }
+
+    void operator delete( void * p )
+    {
+        quick_allocator<this_type>::dealloc( p );
+    }
+
+#endif
+};
+
+//
+// Borland's Codeguard trips up over the -Vx- option here:
+//
+#ifdef __CODEGUARD__
+# pragma option push -Vx-
+#endif
+
+template<class P, class D> class sp_counted_impl_pd: public sp_counted_base
+{
+private:
+
+    P ptr; // copy constructor must not throw
+    D del; // copy constructor must not throw
+
+    sp_counted_impl_pd( sp_counted_impl_pd const & );
+    sp_counted_impl_pd & operator= ( sp_counted_impl_pd const & );
+
+    typedef sp_counted_impl_pd<P, D> this_type;
+
+public:
+
+    // pre: d(p) must not throw
+
+    sp_counted_impl_pd( P p, D d ): ptr(p), del(d)
+    {
+    }
+
+    virtual void dispose() // nothrow
+    {
+        del( ptr );
+    }
+
+    virtual void * get_deleter( detail::sp_typeinfo const & ti )
+    {
+        return ti == BOOST_SP_TYPEID(D)? &reinterpret_cast<char&>( del ): 0;
+    }
+
+#if defined(BOOST_SP_USE_STD_ALLOCATOR)
+
+    void * operator new( std::size_t )
+    {
+        return std::allocator<this_type>().allocate( 1, static_cast<this_type *>(0) );
+    }
+
+    void operator delete( void * p )
+    {
+        std::allocator<this_type>().deallocate( static_cast<this_type *>(p), 1 );
+    }
+
+#endif
+
+#if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
+
+    void * operator new( std::size_t )
+    {
+        return quick_allocator<this_type>::alloc();
+    }
+
+    void operator delete( void * p )
+    {
+        quick_allocator<this_type>::dealloc( p );
+    }
+
+#endif
+};
+
+template<class P, class D, class A> class sp_counted_impl_pda: public sp_counted_base
+{
+private:
+
+    P p_; // copy constructor must not throw
+    D d_; // copy constructor must not throw
+    A a_; // copy constructor must not throw
+
+    sp_counted_impl_pda( sp_counted_impl_pda const & );
+    sp_counted_impl_pda & operator= ( sp_counted_impl_pda const & );
+
+    typedef sp_counted_impl_pda<P, D, A> this_type;
+
+public:
+
+    // pre: d( p ) must not throw
+
+    sp_counted_impl_pda( P p, D d, A a ): p_( p ), d_( d ), a_( a )
+    {
+    }
+
+    virtual void dispose() // nothrow
+    {
+        d_( p_ );
+    }
+
+    virtual void destroy() // nothrow
+    {
+        typedef typename A::template rebind< this_type >::other A2;
+
+        A2 a2( a_ );
+
+        this->~this_type();
+        a2.deallocate( this, 1 );
+    }
+
+    virtual void * get_deleter( detail::sp_typeinfo const & ti )
+    {
+        return ti == BOOST_SP_TYPEID( D )? &reinterpret_cast<char&>( d_ ): 0;
+    }
+};
+
+#ifdef __CODEGUARD__
+# pragma option pop
+#endif
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_DETAIL_SP_COUNTED_IMPL_HPP_INCLUDED
--- a/include/boost/detail/sp_typeinfo.hpp
+++ b/include/boost/detail/sp_typeinfo.hpp
@@ -0,0 +1,83 @@
+#ifndef BOOST_DETAIL_SP_TYPEINFO_HPP_INCLUDED
+#define BOOST_DETAIL_SP_TYPEINFO_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  detail/sp_typeinfo.hpp
+//
+//  Copyright 2007 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/config.hpp>
+
+#if defined( BOOST_NO_TYPEID )
+
+namespace boost
+{
+
+namespace detail
+{
+
+typedef void* sp_typeinfo;
+
+template<class T> struct sp_typeid_
+{
+    static char v_;
+};
+
+template<class T> char sp_typeid_< T >::v_;
+
+template<class T> struct sp_typeid_< T const >: sp_typeid_< T >
+{
+};
+
+template<class T> struct sp_typeid_< T volatile >: sp_typeid_< T >
+{
+};
+
+template<class T> struct sp_typeid_< T const volatile >: sp_typeid_< T >
+{
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#define BOOST_SP_TYPEID(T) (&boost::detail::sp_typeid_<T>::v_)
+
+#else
+
+#include <typeinfo>
+
+namespace boost
+{
+
+namespace detail
+{
+
+#if defined( BOOST_NO_STD_TYPEINFO )
+
+typedef ::type_info sp_typeinfo;
+
+#else
+
+typedef std::type_info sp_typeinfo;
+
+#endif
+
+} // namespace detail
+
+} // namespace boost
+
+#define BOOST_SP_TYPEID(T) typeid(T)
+
+#endif
+
+#endif  // #ifndef BOOST_DETAIL_SP_TYPEINFO_HPP_INCLUDED
--- a/include/boost/detail/spinlock.hpp
+++ b/include/boost/detail/spinlock.hpp
@@ -0,0 +1,47 @@
+#ifndef BOOST_DETAIL_SPINLOCK_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/detail/spinlock.hpp
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  struct spinlock
+//  {
+//      void lock();
+//      bool try_lock();
+//      void unlock();
+//
+//      class scoped_lock;
+//  };
+//
+//  #define BOOST_DETAIL_SPINLOCK_INIT <unspecified>
+//
+
+#include <boost/config.hpp>
+
+#if defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
+#  include <boost/detail/spinlock_gcc_arm.hpp>
+#elif defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+#  include <boost/detail/spinlock_sync.hpp>
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+#  include <boost/detail/spinlock_w32.hpp>
+#elif defined(BOOST_HAS_PTHREADS)
+#  include <boost/detail/spinlock_pt.hpp>
+#elif !defined(BOOST_HAS_THREADS)
+#  include <boost/detail/spinlock_nt.hpp>
+#else
+#  error Unrecognized threading platform
+#endif
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_HPP_INCLUDED
--- a/include/boost/detail/spinlock_gcc_arm.hpp
+++ b/include/boost/detail/spinlock_gcc_arm.hpp
@@ -0,0 +1,85 @@
+#ifndef BOOST_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/yield_k.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    int v_;
+
+public:
+
+    bool try_lock()
+    {
+        int r;
+
+        __asm__ __volatile__(
+            "swp %0, %1, [%2]":
+            "=&r"( r ): // outputs
+            "r"( 1 ), "r"( &v_ ): // inputs
+            "memory", "cc" );
+
+        return r == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        __asm__ __volatile__( "" ::: "memory" );
+        *const_cast< int volatile* >( &v_ ) = 0;
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_GCC_ARM_HPP_INCLUDED
--- a/include/boost/detail/spinlock_nt.hpp
+++ b/include/boost/detail/spinlock_nt.hpp
@@ -0,0 +1,89 @@
+#ifndef BOOST_DETAIL_SPINLOCK_NT_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_NT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/assert.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    bool locked_;
+
+public:
+
+    inline bool try_lock()
+    {
+        if( locked_ )
+        {
+            return false;
+        }
+        else
+        {
+            locked_ = true;
+            return true;
+        }
+    }
+
+    inline void lock()
+    {
+        BOOST_ASSERT( !locked_ );
+        locked_ = true;
+    }
+
+    inline void unlock()
+    {
+        BOOST_ASSERT( locked_ );
+        locked_ = false;
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT { false }
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_NT_HPP_INCLUDED
--- a/include/boost/detail/spinlock_pool.hpp
+++ b/include/boost/detail/spinlock_pool.hpp
@@ -0,0 +1,87 @@
+#ifndef BOOST_DETAIL_SPINLOCK_POOL_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_POOL_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/detail/spinlock_pool.hpp
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  spinlock_pool<0> is reserved for atomic<>, when/if it arrives
+//  spinlock_pool<1> is reserved for shared_ptr reference counts
+//  spinlock_pool<2> is reserved for shared_ptr atomic access
+//
+
+#include <boost/config.hpp>
+#include <boost/detail/spinlock.hpp>
+#include <cstddef>
+
+namespace boost
+{
+
+namespace detail
+{
+
+template< int I > class spinlock_pool
+{
+private:
+
+    static spinlock pool_[ 41 ];
+
+public:
+
+    static spinlock & spinlock_for( void const * pv )
+    {
+        std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41;
+        return pool_[ i ];
+    }
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) )
+        {
+            sp_.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+template< int I > spinlock spinlock_pool< I >::pool_[ 41 ] =
+{
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
+    BOOST_DETAIL_SPINLOCK_INIT
+};
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_POOL_HPP_INCLUDED
--- a/include/boost/detail/spinlock_pt.hpp
+++ b/include/boost/detail/spinlock_pt.hpp
@@ -0,0 +1,79 @@
+#ifndef BOOST_DETAIL_SPINLOCK_PT_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_PT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <pthread.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    pthread_mutex_t v_;
+
+public:
+
+    bool try_lock()
+    {
+        return pthread_mutex_trylock( &v_ ) == 0;
+    }
+
+    void lock()
+    {
+        pthread_mutex_lock( &v_ );
+    }
+
+    void unlock()
+    {
+        pthread_mutex_unlock( &v_ );
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT { PTHREAD_MUTEX_INITIALIZER }
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_PT_HPP_INCLUDED
--- a/include/boost/detail/spinlock_sync.hpp
+++ b/include/boost/detail/spinlock_sync.hpp
@@ -0,0 +1,87 @@
+#ifndef BOOST_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/yield_k.hpp>
+
+#if defined( __ia64__ ) && defined( __INTEL_COMPILER )
+# include <ia64intrin.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    int v_;
+
+public:
+
+    bool try_lock()
+    {
+        int r = __sync_lock_test_and_set( &v_, 1 );
+        return r == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        __sync_lock_release( &v_ );
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_SYNC_HPP_INCLUDED
--- a/include/boost/detail/spinlock_w32.hpp
+++ b/include/boost/detail/spinlock_w32.hpp
@@ -0,0 +1,113 @@
+#ifndef BOOST_DETAIL_SPINLOCK_W32_HPP_INCLUDED
+#define BOOST_DETAIL_SPINLOCK_W32_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/interlocked.hpp>
+#include <boost/detail/yield_k.hpp>
+
+// BOOST_COMPILER_FENCE
+
+#if defined(__INTEL_COMPILER)
+
+#define BOOST_COMPILER_FENCE __memory_barrier();
+
+#elif defined( _MSC_VER ) && _MSC_VER >= 1310
+
+extern "C" void _ReadWriteBarrier();
+#pragma intrinsic( _ReadWriteBarrier )
+
+#define BOOST_COMPILER_FENCE _ReadWriteBarrier();
+
+#elif defined(__GNUC__)
+
+#define BOOST_COMPILER_FENCE __asm__ __volatile__( "" : : : "memory" );
+
+#else
+
+#define BOOST_COMPILER_FENCE
+
+#endif
+
+//
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    long v_;
+
+public:
+
+    bool try_lock()
+    {
+        long r = BOOST_INTERLOCKED_EXCHANGE( &v_, 1 );
+
+        BOOST_COMPILER_FENCE
+
+        return r == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        BOOST_COMPILER_FENCE
+        *const_cast< long volatile* >( &v_ ) = 0;
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_DETAIL_SPINLOCK_W32_HPP_INCLUDED
--- a/include/boost/detail/winapi.hpp
+++ b/include/boost/detail/winapi.hpp
@@ -1,106 +0,0 @@
-#ifndef BOOST_DETAIL_WINAPI_HPP_INCLUDED
-#define BOOST_DETAIL_WINAPI_HPP_INCLUDED
-
-#if _MSC_VER >= 1020
-#pragma once
-#endif
-
-//
-//  boost/detail/winapi.hpp - a lightweight version of <windows.h>
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-namespace boost
-{
-
-namespace detail
-{
-
-namespace winapi
-{
-
-typedef long long_type;
-typedef unsigned long dword_type;
-typedef void * handle_type;
-
-#if defined(_WIN64)
-
-typedef __int64 int_ptr_type;
-typedef unsigned __int64 uint_ptr_type;
-typedef __int64 long_ptr_type;
-typedef unsigned __int64 ulong_ptr_type;
-
-#else
-
-typedef int int_ptr_type;
-typedef unsigned int uint_ptr_type;
-typedef long long_ptr_type;
-typedef unsigned long ulong_ptr_type;
-
-#endif
-
-struct critical_section
-{
-    struct critical_section_debug * DebugInfo;
-    long_type LockCount;
-    long_type RecursionCount;
-    handle_type OwningThread;
-    handle_type LockSemaphore;
-    ulong_ptr_type SpinCount;
-};
-
-#if defined(_WIN64)
-
-// Intel 6.0 on Win64 version, posted by Tim Fenders to [boost-users]
-
-extern "C" long_type __cdecl _InterlockedIncrement(long_type volatile *);
-extern "C" long_type __cdecl _InterlockedDecrement(long_type volatile *);
-extern "C" long_type __cdecl _InterlockedExchange(long_type volatile *, long_type);
-
-#pragma intrinsic(_InterlockedIncrement)
-#pragma intrinsic(_InterlockedDecrement)
-#pragma intrinsic(_InterlockedExchange)
-
-inline long_type InterlockedIncrement(long_type volatile * lp)
-{ 
-    return _InterlockedIncrement(lp);
-}
-
-inline long_type InterlockedDecrement(long_type volatile* lp)
-{ 
-    return _InterlockedDecrement(lp);
-}
-
-inline long_type InterlockedExchange(long_type volatile* lp, long_type l)
-{
-    return _InterlockedExchange(lp, l);
-}
-
-#else
-
-extern "C" __declspec(dllimport) long_type __stdcall InterlockedIncrement(long_type volatile *);
-extern "C" __declspec(dllimport) long_type __stdcall InterlockedDecrement(long_type volatile *);
-extern "C" __declspec(dllimport) long_type __stdcall InterlockedExchange(long_type volatile *, long_type);
-
-#endif
-
-extern "C" __declspec(dllimport) void __stdcall Sleep(dword_type);
-
-extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
-extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *);
-extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *);
-extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *);
-
-} // namespace winapi
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_DETAIL_WINAPI_HPP_INCLUDED
--- a/include/boost/detail/yield_k.hpp
+++ b/include/boost/detail/yield_k.hpp
@@ -0,0 +1,149 @@
+#ifndef BOOST_DETAIL_YIELD_K_HPP_INCLUDED
+#define BOOST_DETAIL_YIELD_K_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/detail/yield_k.hpp
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  void yield( unsigned k );
+//
+//  Typical use:
+//
+//  for( unsigned k = 0; !try_lock(); ++k ) yield( k );
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/config.hpp>
+
+// BOOST_SMT_PAUSE
+
+#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) )
+
+extern "C" void _mm_pause();
+#pragma intrinsic( _mm_pause )
+
+#define BOOST_SMT_PAUSE _mm_pause();
+
+#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
+
+#define BOOST_SMT_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
+
+#endif
+
+//
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined( BOOST_USE_WINDOWS_H )
+# include <windows.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+#if !defined( BOOST_USE_WINDOWS_H )
+  extern "C" void __stdcall Sleep( unsigned ms );
+#endif
+
+inline void yield( unsigned k )
+{
+    if( k < 4 )
+    {
+    }
+#if defined( BOOST_SMT_PAUSE )
+    else if( k < 16 )
+    {
+        BOOST_SMT_PAUSE
+    }
+#endif
+    else if( k < 32 )
+    {
+        Sleep( 0 );
+    }
+    else
+    {
+        Sleep( 1 );
+    }
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined( BOOST_HAS_PTHREADS )
+
+#include <sched.h>
+#include <time.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void yield( unsigned k )
+{
+    if( k < 4 )
+    {
+    }
+#if defined( BOOST_SMT_PAUSE )
+    else if( k < 16 )
+    {
+        BOOST_SMT_PAUSE
+    }
+#endif
+    else if( k < 32 || k & 1 )
+    {
+        sched_yield();
+    }
+    else
+    {
+        // g++ -Wextra warns on {} or {0}
+        struct timespec rqtp = { 0, 0 };
+
+        // POSIX says that timespec has tv_sec and tv_nsec
+        // But it doesn't guarantee order or placement
+
+        rqtp.tv_sec = 0;
+        rqtp.tv_nsec = 1000;
+
+        nanosleep( &rqtp, 0 );
+    }
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#else
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void yield( unsigned )
+{
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_DETAIL_YIELD_K_HPP_INCLUDED
--- a/include/boost/enable_shared_from_this.hpp
+++ b/include/boost/enable_shared_from_this.hpp
@@ -0,0 +1,73 @@
+#ifndef BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
+#define BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
+
+//
+//  enable_shared_from_this.hpp
+//
+//  Copyright (c) 2002 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+//  http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html
+//
+
+#include <boost/weak_ptr.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+
+namespace boost
+{
+
+template<class T> class enable_shared_from_this
+{
+protected:
+
+    enable_shared_from_this()
+    {
+    }
+
+    enable_shared_from_this(enable_shared_from_this const &)
+    {
+    }
+
+    enable_shared_from_this & operator=(enable_shared_from_this const &)
+    {
+        return *this;
+    }
+
+    ~enable_shared_from_this()
+    {
+    }
+
+public:
+
+    shared_ptr<T> shared_from_this()
+    {
+        shared_ptr<T> p(_internal_weak_this);
+        BOOST_ASSERT(p.get() == this);
+        return p;
+    }
+
+    shared_ptr<T const> shared_from_this() const
+    {
+        shared_ptr<T const> p(_internal_weak_this);
+        BOOST_ASSERT(p.get() == this);
+        return p;
+    }
+
+//  Note: No, you don't need to initialize _internal_weak_this
+//
+//  Please read the documentation, not the code
+//
+//  http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html
+
+    typedef T _internal_element_type; // for bcc 5.5.1
+    mutable weak_ptr<_internal_element_type> _internal_weak_this;
+};
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
--- a/include/boost/get_pointer.hpp
+++ b/include/boost/get_pointer.hpp
@@ -0,0 +1,29 @@
+// Copyright Peter Dimov and David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef GET_POINTER_DWA20021219_HPP
+# define GET_POINTER_DWA20021219_HPP
+
+# include <memory>
+
+namespace boost { 
+
+// get_pointer(p) extracts a ->* capable pointer from p
+
+template<class T> T * get_pointer(T * p)
+{
+    return p;
+}
+
+// get_pointer(shared_ptr<T> const & p) has been moved to shared_ptr.hpp
+
+template<class T> T * get_pointer(std::auto_ptr<T> const& p)
+{
+    return p.get();
+}
+
+
+} // namespace boost
+
+#endif // GET_POINTER_DWA20021219_HPP
--- a/include/boost/intrusive_ptr.hpp
+++ b/include/boost/intrusive_ptr.hpp
@@ -6,20 +6,34 @@
 //
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/intrusive_ptr.html for documentation.
 //

+#include <boost/config.hpp>
+
 #ifdef BOOST_MSVC  // moved here to work around VC++ compiler crash
 # pragma warning(push)
 # pragma warning(disable:4284) // odd return type for operator->
 #endif

-#include <functional> // std::less
+#include <boost/assert.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/detail/sp_convertible.hpp>
+
+#include <boost/config/no_tr1/functional.hpp>           // for std::less
+
+#if !defined(BOOST_NO_IOSTREAM)
+#if !defined(BOOST_NO_IOSFWD)
+#include <iosfwd>               // for std::basic_ostream
+#else
+#include <ostream>
+#endif
+#endif
+

 namespace boost
 {
@@ -47,25 +61,32 @@ private:

 public:

+    typedef T element_type;
+
    intrusive_ptr(): p_(0)
    {
    }

-    intrusive_ptr(T * p): p_(p)
+    intrusive_ptr(T * p, bool add_ref = true): p_(p)
    {
-        if(p_ != 0) intrusive_ptr_add_ref(p_);
-    }
-
-    ~intrusive_ptr()
-    {
-        if(p_ != 0) intrusive_ptr_release(p_);
+        if(p_ != 0 && add_ref) intrusive_ptr_add_ref(p_);
    }

 #if !defined(BOOST_NO_MEMBER_TEMPLATES) || defined(BOOST_MSVC6_MEMBER_TEMPLATES)

-    template<class U> intrusive_ptr(intrusive_ptr<U> const & rhs): p_(rhs.get())
+    template<class U>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+    intrusive_ptr( intrusive_ptr<U> const & rhs, typename detail::sp_enable_if_convertible<U,T>::type = detail::sp_empty() )
+
+#else
+
+    intrusive_ptr( intrusive_ptr<U> const & rhs )
+
+#endif
+    : p_( rhs.get() )
    {
-        if(p_ != 0) intrusive_ptr_add_ref(p_);
+        if( p_ != 0 ) intrusive_ptr_add_ref( p_ );
    }

 #endif
@@ -75,6 +96,11 @@ public:
        if(p_ != 0) intrusive_ptr_add_ref(p_);
    }

+    ~intrusive_ptr()
+    {
+        if(p_ != 0) intrusive_ptr_release(p_);
+    }
+
 #if !defined(BOOST_NO_MEMBER_TEMPLATES) || defined(BOOST_MSVC6_MEMBER_TEMPLATES)

    template<class U> intrusive_ptr & operator=(intrusive_ptr<U> const & rhs)
@@ -97,11 +123,14 @@ public:
        return *this;
    }

-    void swap(intrusive_ptr & rhs)
+    void reset()
    {
-        T * tmp = p_;
-        p_ = rhs.p_;
-        rhs.p_ = tmp;
+        this_type().swap( *this );
+    }
+
+    void reset( T * rhs )
+    {
+        this_type( rhs ).swap( *this );
    }

    T * get() const
@@ -111,24 +140,53 @@ public:

    T & operator*() const
    {
+        BOOST_ASSERT( p_ != 0 );
        return *p_;
    }

    T * operator->() const
    {
+        BOOST_ASSERT( p_ != 0 );
        return p_;
    }

-    bool empty() const
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
+
+    operator bool () const
+    {
+        return p_ != 0;
+    }
+
+#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
+    typedef T * (this_type::*unspecified_bool_type)() const;
+    
+    operator unspecified_bool_type() const // never throws
+    {
+        return p_ == 0? 0: &this_type::get;
+    }
+
+#else 
+
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type () const
+    {
+        return p_ == 0? 0: &this_type::p_;
+    }
+
+#endif
+
+    // operator! is a Borland-specific workaround
+    bool operator! () const
    {
        return p_ == 0;
    }

-    typedef bool (intrusive_ptr::*bool_type) () const;
-
-    operator bool_type () const
+    void swap(intrusive_ptr & rhs)
    {
-        return p_ == 0? 0: &intrusive_ptr::empty;
+        T * tmp = p_;
+        p_ = rhs.p_;
+        rhs.p_ = tmp;
    }

 private:
@@ -136,21 +194,6 @@ private:
    T * p_;
 };

-template<class T> void swap(intrusive_ptr<T> & lhs, intrusive_ptr<T> & rhs)
-{
-    lhs.swap(rhs);
-}
-
-template<class T, class U> intrusive_ptr<T> shared_dynamic_cast(intrusive_ptr<U> const & p)
-{
-    return dynamic_cast<T *>(p.get());
-}
-
-template<class T, class U> intrusive_ptr<T> shared_static_cast(intrusive_ptr<U> const & p)
-{
-    return static_cast<T *>(p.get());
-}
-
 template<class T, class U> inline bool operator==(intrusive_ptr<T> const & a, intrusive_ptr<U> const & b)
 {
    return a.get() == b.get();
@@ -161,31 +204,47 @@ template<class T, class U> inline bool operator!=(intrusive_ptr<T> const & a, in
    return a.get() != b.get();
 }

-template<class T> inline bool operator<(intrusive_ptr<T> const & a, intrusive_ptr<T> const & b)
-{
-    return std::less<T *>(a.get(), b.get());
-}
-
-template<class T> inline bool operator==(intrusive_ptr<T> const & a, T * b)
+template<class T, class U> inline bool operator==(intrusive_ptr<T> const & a, U * b)
 {
    return a.get() == b;
 }

-template<class T> inline bool operator!=(intrusive_ptr<T> const & a, T * b)
+template<class T, class U> inline bool operator!=(intrusive_ptr<T> const & a, U * b)
 {
    return a.get() != b;
 }

-template<class T> inline bool operator==(T * a, intrusive_ptr<T> const & b)
+template<class T, class U> inline bool operator==(T * a, intrusive_ptr<U> const & b)
 {
    return a == b.get();
 }

-template<class T> inline bool operator!=(T * a, intrusive_ptr<T> const & b)
+template<class T, class U> inline bool operator!=(T * a, intrusive_ptr<U> const & b)
 {
    return a != b.get();
 }

+#if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
+
+// Resolve the ambiguity between our op!= and the one in rel_ops
+
+template<class T> inline bool operator!=(intrusive_ptr<T> const & a, intrusive_ptr<T> const & b)
+{
+    return a.get() != b.get();
+}
+
+#endif
+
+template<class T> inline bool operator<(intrusive_ptr<T> const & a, intrusive_ptr<T> const & b)
+{
+    return std::less<T *>()(a.get(), b.get());
+}
+
+template<class T> void swap(intrusive_ptr<T> & lhs, intrusive_ptr<T> & rhs)
+{
+    lhs.swap(rhs);
+}
+
 // mem_fn support

 template<class T> T * get_pointer(intrusive_ptr<T> const & p)
@@ -193,6 +252,56 @@ template<class T> T * get_pointer(intrusive_ptr<T> const & p)
    return p.get();
 }

+template<class T, class U> intrusive_ptr<T> static_pointer_cast(intrusive_ptr<U> const & p)
+{
+    return static_cast<T *>(p.get());
+}
+
+template<class T, class U> intrusive_ptr<T> const_pointer_cast(intrusive_ptr<U> const & p)
+{
+    return const_cast<T *>(p.get());
+}
+
+template<class T, class U> intrusive_ptr<T> dynamic_pointer_cast(intrusive_ptr<U> const & p)
+{
+    return dynamic_cast<T *>(p.get());
+}
+
+// operator<<
+
+#if !defined(BOOST_NO_IOSTREAM)
+
+#if defined(BOOST_NO_TEMPLATED_IOSTREAMS) || ( defined(__GNUC__) &&  (__GNUC__ < 3) )
+
+template<class Y> std::ostream & operator<< (std::ostream & os, intrusive_ptr<Y> const & p)
+{
+    os << p.get();
+    return os;
+}
+
+#else
+
+// in STLport's no-iostreams mode no iostream symbols can be used
+#ifndef _STLP_NO_IOSTREAMS
+
+# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
+// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
+using std::basic_ostream;
+template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, intrusive_ptr<Y> const & p)
+# else
+template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, intrusive_ptr<Y> const & p)
+# endif 
+{
+    os << p.get();
+    return os;
+}
+
+#endif // _STLP_NO_IOSTREAMS
+
+#endif // __GNUC__ < 3
+
+#endif // !defined(BOOST_NO_IOSTREAM)
+
 } // namespace boost

 #ifdef BOOST_MSVC
--- a/include/boost/make_shared.hpp
+++ b/include/boost/make_shared.hpp
@@ -0,0 +1,433 @@
+#ifndef BOOST_MAKE_SHARED_HPP_INCLUDED
+#define BOOST_MAKE_SHARED_HPP_INCLUDED
+
+//  make_shared.hpp
+//
+//  Copyright (c) 2007, 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+//
+//  See http://www.boost.org/libs/smart_ptr/make_shared.html
+//  for documentation.
+
+#include <boost/config.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/type_traits/type_with_alignment.hpp>
+#include <boost/type_traits/alignment_of.hpp>
+#include <cstddef>
+#include <new>
+
+namespace boost
+{
+
+namespace detail
+{
+
+template< std::size_t N, std::size_t A > struct sp_aligned_storage
+{
+    union type
+    {
+        char data_[ N ];
+        typename boost::type_with_alignment< A >::type align_;
+    };
+};
+
+template< class T > class sp_ms_deleter
+{
+private:
+
+    typedef typename sp_aligned_storage< sizeof( T ), ::boost::alignment_of< T >::value >::type storage_type;
+
+    bool initialized_;
+    storage_type storage_;
+
+private:
+
+    void destroy()
+    {
+        if( initialized_ )
+        {
+            reinterpret_cast< T* >( storage_.data_ )->~T();
+            initialized_ = false;
+        }
+    }
+
+public:
+
+    sp_ms_deleter(): initialized_( false )
+    {
+    }
+
+    ~sp_ms_deleter()
+    {
+        destroy();
+    }
+
+    void operator()( T * )
+    {
+        destroy();
+    }
+
+    void * address()
+    {
+        return storage_.data_;
+    }
+
+    void set_initialized()
+    {
+        initialized_ = true;
+    }
+};
+
+template< class T > T forward( T t )
+{
+    return t;
+}
+
+} // namespace detail
+
+// Zero-argument versions
+//
+// Used even when variadic templates are available because of the new T() vs new T issue
+
+template< class T > boost::shared_ptr< T > make_shared()
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T();
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A > boost::shared_ptr< T > allocate_shared( A const & a )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T();
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+#if defined( BOOST_HAS_VARIADIC_TMPL ) && defined( BOOST_HAS_RVALUE_REFS )
+
+// Variadic templates, rvalue reference
+
+template< class T, class... Args > boost::shared_ptr< T > make_shared( Args && ... args )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( detail::forward<Args>( args )... );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class... Args > boost::shared_ptr< T > allocate_shared( A const & a, Args && ... args )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( detail::forward<Args>( args )... );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+#else
+
+// C++03 version
+
+template< class T, class A1 >
+boost::shared_ptr< T > make_shared( A1 const & a1 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4, class A5 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4, class A5 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4, class A5, class A6 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 >
+boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8, A9 const & a9 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 >
+boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8, A9 const & a9 )
+{
+    boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
+
+    detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
+
+    void * pv = pd->address();
+
+    new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 );
+    pd->set_initialized();
+
+    return boost::shared_ptr< T >( pt, static_cast< T* >( pv ) );
+}
+
+#endif
+
+} // namespace boost
+
+#endif // #ifndef BOOST_MAKE_SHARED_HPP_INCLUDED
--- a/include/boost/memory_order.hpp
+++ b/include/boost/memory_order.hpp
@@ -0,0 +1,35 @@
+#ifndef BOOST_MEMORY_ORDER_HPP_INCLUDED
+#define BOOST_MEMORY_ORDER_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  boost/memory_order.hpp
+//
+//  Defines enum boost::memory_order per the C++0x working draft
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+
+namespace boost
+{
+
+enum memory_order
+{
+    memory_order_relaxed = 0,
+    memory_order_acquire = 1,
+    memory_order_release = 2,
+    memory_order_acq_rel = 3, // acquire | release
+    memory_order_seq_cst = 7  // acq_rel | 4
+};
+
+} // namespace boost
+
+#endif // #ifndef BOOST_MEMORY_ORDER_HPP_INCLUDED
--- a/include/boost/pointer_cast.hpp
+++ b/include/boost/pointer_cast.hpp
@@ -0,0 +1,45 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005. 
+// Distributed under the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at 
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_POINTER_CAST_HPP
+#define BOOST_POINTER_CAST_HPP
+
+namespace boost { 
+
+//static_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* static_pointer_cast(U *ptr)
+{  
+   return static_cast<T*>(ptr);
+}
+
+//dynamic_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* dynamic_pointer_cast(U *ptr)
+{  
+   return dynamic_cast<T*>(ptr);
+}
+
+//const_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* const_pointer_cast(U *ptr)
+{  
+   return const_cast<T*>(ptr);
+}
+
+//reinterpret_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* reinterpret_pointer_cast(U *ptr)
+{  
+   return reinterpret_cast<T*>(ptr);
+}
+
+} // namespace boost
+
+#endif   //BOOST_POINTER_CAST_HPP
--- a/include/boost/pointer_to_other.hpp
+++ b/include/boost/pointer_to_other.hpp
@@ -0,0 +1,55 @@
+#ifndef BOOST_POINTER_TO_OTHER_HPP_INCLUDED
+#define BOOST_POINTER_TO_OTHER_HPP_INCLUDED
+
+//
+//  pointer_to_other.hpp
+//
+//  (C) Copyright Ion Gaztanaga 2005.
+//  Copyright (c) 2005 Peter Dimov.
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//
+//  (See accompanying file LICENSE_1_0.txt or copy at 
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  See http://www.boost.org/libs/smart_ptr/pointer_to_other.html
+//
+
+namespace boost
+{
+
+// Defines the same pointer type (raw or smart) to another pointee type
+
+template<class T, class U>
+struct pointer_to_other;
+
+template<class T, class U, 
+         template<class> class Sp>
+struct pointer_to_other< Sp<T>, U >
+{
+   typedef Sp<U> type;
+};
+
+template<class T, class T2, class U, 
+         template<class, class> class Sp>
+struct pointer_to_other< Sp<T, T2>, U >
+{
+   typedef Sp<U, T2> type;
+};
+
+template<class T, class T2, class T3, class U, 
+         template<class, class, class> class Sp>
+struct pointer_to_other< Sp<T, T2, T3>, U >
+{
+   typedef Sp<U, T2, T3> type;
+};
+
+template<class T, class U>
+struct pointer_to_other< T*, U >
+{
+   typedef U* type;
+};
+
+} // namespace boost
+
+#endif // #ifndef BOOST_POINTER_TO_OTHER_HPP_INCLUDED
--- a/include/boost/scoped_array.hpp
+++ b/include/boost/scoped_array.hpp
@@ -4,27 +4,38 @@
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
-//  See http://www.boost.org/libs/smart_ptr/scoped_array.htm for documentation.
+//  http://www.boost.org/libs/smart_ptr/scoped_array.htm
 //

 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
 #include <boost/config.hpp>   // in case ptrdiff_t not in std
+
+#include <boost/detail/workaround.hpp>
+
 #include <cstddef>            // for std::ptrdiff_t

 namespace boost
 {

+// Debug hooks
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+void sp_array_constructor_hook(void * p);
+void sp_array_destructor_hook(void * p);
+
+#endif
+
 //  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
 //  is guaranteed, either on destruction of the scoped_array or via an explicit
 //  reset(). Use shared_array or std::vector if your needs are more complex.

-template<typename T> class scoped_array // noncopyable
+template<class T> class scoped_array // noncopyable
 {
 private:

@@ -35,26 +46,32 @@ private:

    typedef scoped_array<T> this_type;

+    void operator==( scoped_array const& ) const;
+    void operator!=( scoped_array const& ) const;
+
 public:

    typedef T element_type;

    explicit scoped_array(T * p = 0) : ptr(p) // never throws
    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_array_constructor_hook(ptr);
+#endif
    }

    ~scoped_array() // never throws
    {
-        checked_array_delete(ptr);
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_array_destructor_hook(ptr);
+#endif
+        boost::checked_array_delete(ptr);
    }

    void reset(T * p = 0) // never throws
    {
-        if (ptr != p)
-        {
-            checked_array_delete(ptr);
-            ptr = p;
-        }
+        BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
+        this_type(p).swap(*this);
    }

    T & operator[](std::ptrdiff_t i) const // never throws
@@ -71,13 +88,32 @@ public:

    // implicit conversion to "bool"

-    typedef T * (this_type::*unspecified_bool_type)() const;
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)

+    operator bool () const
+    {
+        return ptr != 0;
+    }
+
+#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
+    typedef T * (this_type::*unspecified_bool_type)() const;
+    
    operator unspecified_bool_type() const // never throws
    {
        return ptr == 0? 0: &this_type::get;
    }

+#else 
+
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return ptr == 0? 0: &this_type::ptr;
+    }
+
+#endif
+
    bool operator! () const // never throws
    {
        return ptr == 0;
--- a/include/boost/scoped_ptr.hpp
+++ b/include/boost/scoped_ptr.hpp
@@ -4,16 +4,16 @@
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
-//  See http://www.boost.org/libs/smart_ptr/scoped_ptr.htm for documentation.
+//  http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
 //

 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
+#include <boost/detail/workaround.hpp>

 #ifndef BOOST_NO_AUTO_PTR
 # include <memory>          // for std::auto_ptr
@@ -22,12 +22,21 @@
 namespace boost
 {

+// Debug hooks
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+void sp_scalar_constructor_hook(void * p);
+void sp_scalar_destructor_hook(void * p);
+
+#endif
+
 //  scoped_ptr mimics a built-in pointer except that it guarantees deletion
 //  of the object pointed to, either on destruction of the scoped_ptr or via
 //  an explicit reset(). scoped_ptr is a simple solution for simple needs;
 //  use shared_ptr or std::auto_ptr if your needs are more complex.

-template<typename T> class scoped_ptr // noncopyable
+template<class T> class scoped_ptr // noncopyable
 {
 private:

@@ -38,33 +47,43 @@ private:

    typedef scoped_ptr<T> this_type;

+    void operator==( scoped_ptr const& ) const;
+    void operator!=( scoped_ptr const& ) const;
+
 public:

    typedef T element_type;

    explicit scoped_ptr(T * p = 0): ptr(p) // never throws
    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_constructor_hook(ptr);
+#endif
    }

 #ifndef BOOST_NO_AUTO_PTR

    explicit scoped_ptr(std::auto_ptr<T> p): ptr(p.release()) // never throws
    {
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_constructor_hook(ptr);
+#endif
    }

 #endif

    ~scoped_ptr() // never throws
    {
-        checked_delete(ptr);
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+        boost::sp_scalar_destructor_hook(ptr);
+#endif
+        boost::checked_delete(ptr);
    }

    void reset(T * p = 0) // never throws
    {
-        if(ptr != p)
-        {
-            this_type(p).swap(*this);
-        }
+        BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
+        this_type(p).swap(*this);
    }

    T & operator*() const // never throws
@@ -86,13 +105,31 @@ public:

    // implicit conversion to "bool"

-    typedef T * (this_type::*unspecified_bool_type)() const;
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)

+    operator bool () const
+    {
+        return ptr != 0;
+    }
+
+#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
+    typedef T * (this_type::*unspecified_bool_type)() const;
+    
    operator unspecified_bool_type() const // never throws
    {
        return ptr == 0? 0: &this_type::get;
    }

+#else 
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return ptr == 0? 0: &this_type::ptr;
+    }
+
+#endif
+
    bool operator! () const // never throws
    {
        return ptr == 0;
@@ -106,14 +143,14 @@ public:
    }
 };

-template<typename T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
+template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
 {
    a.swap(b);
 }

 // get_pointer(p) is a generic way to say p.get()

-template<typename T> inline T * get_pointer(scoped_ptr<T> const & p)
+template<class T> inline T * get_pointer(scoped_ptr<T> const & p)
 {
    return p.get();
 }
--- a/include/boost/shared_array.hpp
+++ b/include/boost/shared_array.hpp
@@ -7,10 +7,9 @@
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
 //  Copyright (c) 2001, 2002 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation.
 //
@@ -21,10 +20,13 @@
 #include <boost/detail/shared_array_nmt.hpp>
 #else

+#include <memory>             // TR1 cyclic inclusion fix
+
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>

 #include <boost/detail/shared_count.hpp>
+#include <boost/detail/workaround.hpp>

 #include <cstddef>            // for std::ptrdiff_t
 #include <algorithm>          // for std::swap
@@ -41,7 +43,7 @@ namespace boost
 //  is destroyed or reset.
 //

-template<typename T> class shared_array
+template<class T> class shared_array
 {
 private:

@@ -63,7 +65,7 @@ public:
    // shared_array will release p by calling d(p)
    //

-    template<typename D> shared_array(T * p, D d): px(p), pn(p, d)
+    template<class D> shared_array(T * p, D d): px(p), pn(p, d)
    {
    }

@@ -75,7 +77,7 @@ public:
        this_type(p).swap(*this);
    }

-    template <typename D> void reset(T * p, D d)
+    template <class D> void reset(T * p, D d)
    {
        this_type(p, d).swap(*this);
    }
@@ -94,13 +96,48 @@ public:

    // implicit conversion to "bool"

-    typedef T * (this_type::*unspecified_bool_type)() const;
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)

+    operator bool () const
+    {
+        return px != 0;
+    }
+
+#elif defined( _MANAGED )
+
+    static void unspecified_bool( this_type*** )
+    {
+    }
+
+    typedef void (*unspecified_bool_type)( this_type*** );
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return px == 0? 0: unspecified_bool;
+    }
+
+#elif \
+    ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
+    ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) )
+
+    typedef T * (this_type::*unspecified_bool_type)() const;
+    
    operator unspecified_bool_type() const // never throws
    {
        return px == 0? 0: &this_type::get;
    }

+#else 
+
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return px == 0? 0: &this_type::px;
+    }
+
+#endif
+
    bool operator! () const // never throws
    {
        return px == 0;
@@ -129,22 +166,22 @@ private:

 };  // shared_array

-template<typename T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) // never throws
+template<class T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) // never throws
 {
    return a.get() == b.get();
 }

-template<typename T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) // never throws
+template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) // never throws
 {
    return a.get() != b.get();
 }

-template<typename T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) // never throws
+template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) // never throws
 {
    return std::less<T*>()(a.get(), b.get());
 }

-template<typename T> void swap(shared_array<T> & a, shared_array<T> & b) // never throws
+template<class T> void swap(shared_array<T> & a, shared_array<T> & b) // never throws
 {
    a.swap(b);
 }
--- a/include/boost/shared_ptr.hpp
+++ b/include/boost/shared_ptr.hpp
@@ -5,12 +5,11 @@
 //  shared_ptr.hpp
 //
 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
-//  Copyright (c) 2001, 2002 Peter Dimov
+//  Copyright (c) 2001-2008 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/shared_ptr.htm for documentation.
 //
@@ -21,15 +20,35 @@
 #include <boost/detail/shared_ptr_nmt.hpp>
 #else

+// In order to avoid circular dependencies with Boost.TR1
+// we make sure that our include of <memory> doesn't try to
+// pull in the TR1 headers: that's why we use this header 
+// rather than including <memory> directly:
+#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
+
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
 #include <boost/throw_exception.hpp>
 #include <boost/detail/shared_count.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/detail/sp_convertible.hpp>

-#include <memory>             // for std::auto_ptr
-#include <algorithm>          // for std::swap
-#include <functional>         // for std::less
-#include <typeinfo>           // for std::bad_cast
+#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
+#include <boost/detail/spinlock_pool.hpp>
+#include <boost/memory_order.hpp>
+#endif
+
+#include <algorithm>            // for std::swap
+#include <functional>           // for std::less
+#include <typeinfo>             // for std::bad_cast
+
+#if !defined(BOOST_NO_IOSTREAM)
+#if !defined(BOOST_NO_IOSFWD)
+#include <iosfwd>               // for std::basic_ostream
+#else
+#include <ostream>
+#endif
+#endif

 #ifdef BOOST_MSVC  // moved here to work around VC++ compiler crash
 # pragma warning(push)
@@ -39,14 +58,18 @@
 namespace boost
 {

+template<class T> class weak_ptr;
+template<class T> class enable_shared_from_this;
+
 namespace detail
 {

 struct static_cast_tag {};
+struct const_cast_tag {};
 struct dynamic_cast_tag {};
 struct polymorphic_cast_tag {};

-template<typename T> struct shared_ptr_traits
+template<class T> struct shared_ptr_traits
 {
    typedef T & reference;
 };
@@ -63,6 +86,68 @@ template<> struct shared_ptr_traits<void const>
    typedef void reference;
 };

+template<> struct shared_ptr_traits<void volatile>
+{
+    typedef void reference;
+};
+
+template<> struct shared_ptr_traits<void const volatile>
+{
+    typedef void reference;
+};
+
+#endif
+
+// enable_shared_from_this support
+
+template<class T, class Y> void sp_enable_shared_from_this( shared_count const & pn, boost::enable_shared_from_this<T> const * pe, Y const * px )
+{
+    if(pe != 0) pe->_internal_weak_this._internal_assign(const_cast<Y*>(px), pn);
+}
+
+#ifdef _MANAGED
+
+// Avoid C4793, ... causes native code generation
+
+struct sp_any_pointer
+{
+    template<class T> sp_any_pointer( T* ) {}
+};
+
+inline void sp_enable_shared_from_this( shared_count const & /*pn*/, sp_any_pointer, sp_any_pointer )
+{
+}
+
+#else // _MANAGED
+
+#ifdef sgi
+// Turn off: the last argument of the varargs function "sp_enable_shared_from_this" is unnamed
+# pragma set woff 3506
+#endif
+
+inline void sp_enable_shared_from_this( shared_count const & /*pn*/, ... )
+{
+}
+
+#ifdef sgi
+# pragma reset woff 3506
+#endif
+
+#endif // _MANAGED
+
+#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( BOOST_NO_AUTO_PTR )
+
+// rvalue auto_ptr support based on a technique by Dave Abrahams
+
+template< class T, class R > struct sp_enable_if_auto_ptr
+{
+};
+
+template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R >
+{
+    typedef R type;
+}; 
+
 #endif

 } // namespace detail
@@ -76,29 +161,28 @@ template<> struct shared_ptr_traits<void const>
 //  is destroyed or reset.
 //

-template<typename T> class weak_ptr;
-template<typename T> class intrusive_ptr;
-
-template<typename T> class shared_ptr
+template<class T> class shared_ptr
 {
 private:

-    // Borland 5.5.1 specific workarounds
-//  typedef checked_deleter<T> deleter;
+    // Borland 5.5.1 specific workaround
    typedef shared_ptr<T> this_type;

 public:

    typedef T element_type;
    typedef T value_type;
+    typedef T * pointer;
+    typedef typename boost::detail::shared_ptr_traits<T>::reference reference;

-    shared_ptr(): px(0), pn()
+    shared_ptr(): px(0), pn() // never throws in 1.30+
    {
    }

-    template<typename Y>
-    explicit shared_ptr(Y * p): px(p), pn(p, checked_deleter<Y>(), p) // Y must be complete
+    template<class Y>
+    explicit shared_ptr( Y * p ): px( p ), pn( p ) // Y must be complete
    {
+        boost::detail::sp_enable_shared_from_this( pn, p, p );
    }

    //
@@ -107,45 +191,91 @@ public:
    // shared_ptr will release p by calling d(p)
    //

-    template<typename Y, typename D> shared_ptr(Y * p, D d): px(p), pn(p, d)
+    template<class Y, class D> shared_ptr(Y * p, D d): px(p), pn(p, d)
    {
+        boost::detail::sp_enable_shared_from_this( pn, p, p );
    }

-//  generated copy constructor, assignment, destructor are fine
+    // As above, but with allocator. A's copy constructor shall not throw.

-    template<typename Y>
-    explicit shared_ptr(weak_ptr<Y> const & r): px(r.px), pn(r.pn) // may throw
+    template<class Y, class D, class A> shared_ptr( Y * p, D d, A a ): px( p ), pn( p, d, a )
    {
+        boost::detail::sp_enable_shared_from_this( pn, p, p );
    }

-    template<typename Y>
-    shared_ptr(shared_ptr<Y> const & r): px(r.px), pn(r.pn) // never throws
+//  generated copy constructor, assignment, destructor are fine...
+
+//  except that Borland C++ has a bug, and g++ with -Wsynth warns
+#if defined(__BORLANDC__) || defined(__GNUC__)
+
+    shared_ptr & operator=(shared_ptr const & r) // never throws
    {
+        px = r.px;
+        pn = r.pn; // shared_count::op= doesn't throw
+        return *this;
    }

-    template<typename Y>
-    shared_ptr(intrusive_ptr<Y> const & r): px(r.get()), pn(r.get()) // never throws
+#endif
+
+    template<class Y>
+    explicit shared_ptr(weak_ptr<Y> const & r): pn(r.pn) // may throw
    {
+        // it is now safe to copy r.px, as pn(r.pn) did not throw
+        px = r.px;
    }

-    template<typename Y>
-    shared_ptr(shared_ptr<Y> const & r, detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)
+    template<class Y>
+    shared_ptr( weak_ptr<Y> const & r, boost::detail::sp_nothrow_tag ): px( 0 ), pn( r.pn, boost::detail::sp_nothrow_tag() ) // never throws
    {
-    }
-
-    template<typename Y>
-    shared_ptr(shared_ptr<Y> const & r, detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
-    {
-        if (px == 0) // need to allocate new counter -- the cast failed
+        if( !pn.empty() )
        {
-            pn = detail::shared_count();
+            px = r.px;
        }
    }

-    template<typename Y>
-    shared_ptr(shared_ptr<Y> const & r, detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
+    template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+    shared_ptr( shared_ptr<Y> const & r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+    shared_ptr( shared_ptr<Y> const & r )
+
+#endif
+    : px( r.px ), pn( r.pn ) // never throws
    {
-        if (px == 0)
+    }
+
+    // aliasing
+    template< class Y >
+    shared_ptr( shared_ptr<Y> const & r, T * p ): px( p ), pn( r.pn ) // never throws
+    {
+    }
+
+    template<class Y>
+    shared_ptr(shared_ptr<Y> const & r, boost::detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)
+    {
+    }
+
+    template<class Y>
+    shared_ptr(shared_ptr<Y> const & r, boost::detail::const_cast_tag): px(const_cast<element_type *>(r.px)), pn(r.pn)
+    {
+    }
+
+    template<class Y>
+    shared_ptr(shared_ptr<Y> const & r, boost::detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
+    {
+        if(px == 0) // need to allocate new counter -- the cast failed
+        {
+            pn = boost::detail::shared_count();
+        }
+    }
+
+    template<class Y>
+    shared_ptr(shared_ptr<Y> const & r, boost::detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
+    {
+        if(px == 0)
        {
            boost::throw_exception(std::bad_cast());
        }
@@ -153,16 +283,32 @@ public:

 #ifndef BOOST_NO_AUTO_PTR

-    template<typename Y>
-    explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn(r)
+    template<class Y>
+    explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn()
    {
+        Y * tmp = r.get();
+        pn = boost::detail::shared_count(r);
+        boost::detail::sp_enable_shared_from_this( pn, tmp, tmp );
    }

-#endif
+#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )

-#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1200)
+    template<class Ap>
+    shared_ptr( Ap r, typename boost::detail::sp_enable_if_auto_ptr<Ap, int>::type = 0 ): px( r.get() ), pn()
+    {
+        typename Ap::element_type * tmp = r.get();
+        pn = boost::detail::shared_count( r );
+        boost::detail::sp_enable_shared_from_this( pn, tmp, tmp );
+    }

-    template<typename Y>
+
+#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+#endif // BOOST_NO_AUTO_PTR
+
+#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1300)
+
+    template<class Y>
    shared_ptr & operator=(shared_ptr<Y> const & r) // never throws
    {
        px = r.px;
@@ -174,32 +320,95 @@ public:

 #ifndef BOOST_NO_AUTO_PTR

-    template<typename Y>
-    shared_ptr & operator=(std::auto_ptr<Y> & r)
+    template<class Y>
+    shared_ptr & operator=( std::auto_ptr<Y> & r )
    {
        this_type(r).swap(*this);
        return *this;
    }

+#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
+
+    template<class Ap>
+    typename boost::detail::sp_enable_if_auto_ptr< Ap, shared_ptr & >::type operator=( Ap r )
+    {
+        this_type( r ).swap( *this );
+        return *this;
+    }
+
+
+#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+#endif // BOOST_NO_AUTO_PTR
+
+// Move support
+
+#if defined( BOOST_HAS_RVALUE_REFS )
+
+    shared_ptr( shared_ptr && r ): px( r.px ), pn() // never throws
+    {
+        pn.swap( r.pn );
+        r.px = 0;
+    }
+
+    template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+    shared_ptr( shared_ptr<Y> && r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+    shared_ptr( shared_ptr<Y> && r )
+
+#endif
+    : px( r.px ), pn() // never throws
+    {
+        pn.swap( r.pn );
+        r.px = 0;
+    }
+
+    shared_ptr & operator=( shared_ptr && r ) // never throws
+    {
+        this_type( static_cast< shared_ptr && >( r ) ).swap( *this );
+        return *this;
+    }
+
+    template<class Y>
+    shared_ptr & operator=( shared_ptr<Y> && r ) // never throws
+    {
+        this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
+        return *this;
+    }
+
 #endif

-    void reset()
+    void reset() // never throws in 1.30+
    {
        this_type().swap(*this);
    }

-    template<typename Y> void reset(Y * p) // Y must be complete
+    template<class Y> void reset(Y * p) // Y must be complete
    {
        BOOST_ASSERT(p == 0 || p != px); // catch self-reset errors
        this_type(p).swap(*this);
    }

-    template<typename Y, typename D> void reset(Y * p, D d)
+    template<class Y, class D> void reset( Y * p, D d )
    {
-        this_type(p, d).swap(*this);
+        this_type( p, d ).swap( *this );
    }

-    typename detail::shared_ptr_traits<T>::reference operator* () const // never throws
+    template<class Y, class D, class A> void reset( Y * p, D d, A a )
+    {
+        this_type( p, d, a ).swap( *this );
+    }
+
+    template<class Y> void reset( shared_ptr<Y> const & r, T * p )
+    {
+        this_type( r, p ).swap( *this );
+    }
+
+    reference operator* () const // never throws
    {
        BOOST_ASSERT(px != 0);
        return *px;
@@ -210,7 +419,7 @@ public:
        BOOST_ASSERT(px != 0);
        return px;
    }
-    
+
    T * get() const // never throws
    {
        return px;
@@ -218,6 +427,31 @@ public:

    // implicit conversion to "bool"

+#if ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, < 0x570) ) || defined(__CINT__)
+
+    operator bool () const
+    {
+        return px != 0;
+    }
+
+#elif defined( _MANAGED )
+
+    static void unspecified_bool( this_type*** )
+    {
+    }
+
+    typedef void (*unspecified_bool_type)( this_type*** );
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return px == 0? 0: unspecified_bool;
+    }
+
+#elif \
+    ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
+    ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) ) || \
+    ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590) )
+
    typedef T * (this_type::*unspecified_bool_type)() const;

    operator unspecified_bool_type() const // never throws
@@ -225,6 +459,19 @@ public:
        return px == 0? 0: &this_type::get;
    }

+#else
+
+    typedef T * this_type::*unspecified_bool_type;
+
+    operator unspecified_bool_type() const // never throws
+    {
+        return px == 0? 0: &this_type::px;
+    }
+
+#endif
+
+    // operator! is redundant, but some compilers need it
+
    bool operator! () const // never throws
    {
        return px == 0;
@@ -246,6 +493,21 @@ public:
        pn.swap(other.pn);
    }

+    template<class Y> bool _internal_less(shared_ptr<Y> const & rhs) const
+    {
+        return pn < rhs.pn;
+    }
+
+    void * _internal_get_deleter( detail::sp_typeinfo const & ti ) const
+    {
+        return pn.get_deleter( ti );
+    }
+
+    bool _internal_equiv( shared_ptr const & r ) const
+    {
+        return px == r.px && pn == r.pn;
+    }
+
 // Tasteless as this may seem, making all members public allows member templates
 // to work in the absence of member template friends. (Matthew Langston)

@@ -253,23 +515,23 @@ public:

 private:

-    template<typename Y> friend class shared_ptr;
-    template<typename Y> friend class weak_ptr;
+    template<class Y> friend class shared_ptr;
+    template<class Y> friend class weak_ptr;


 #endif

    T * px;                     // contained pointer
-    detail::shared_count pn;    // reference counter
+    boost::detail::shared_count pn;    // reference counter

 };  // shared_ptr

-template<typename T, typename U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b)
+template<class T, class U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b)
 {
    return a.get() == b.get();
 }

-template<typename T, typename U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)
+template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)
 {
    return a.get() != b.get();
 }
@@ -278,39 +540,56 @@ template<typename T, typename U> inline bool operator!=(shared_ptr<T> const & a,

 // Resolve the ambiguity between our op!= and the one in rel_ops

-template<typename T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b)
+template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b)
 {
    return a.get() != b.get();
 }

 #endif

-template<typename T> inline bool operator<(shared_ptr<T> const & a, shared_ptr<T> const & b)
+template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b)
 {
-    return std::less<T*>()(a.get(), b.get());
+    return a._internal_less(b);
 }

-template<typename T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)
+template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)
 {
    a.swap(b);
 }

-template<typename T, typename U> shared_ptr<T> shared_static_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r)
 {
-    return shared_ptr<T>(r, detail::static_cast_tag());
+    return shared_ptr<T>(r, boost::detail::static_cast_tag());
 }

-template<typename T, typename U> shared_ptr<T> shared_dynamic_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r)
 {
-    return shared_ptr<T>(r, detail::dynamic_cast_tag());
+    return shared_ptr<T>(r, boost::detail::const_cast_tag());
 }

-template<typename T, typename U> shared_ptr<T> shared_polymorphic_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r)
 {
-    return shared_ptr<T>(r, detail::polymorphic_cast_tag());
+    return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
 }

-template<typename T, typename U> shared_ptr<T> shared_polymorphic_downcast(shared_ptr<U> const & r)
+// shared_*_cast names are deprecated. Use *_pointer_cast instead.
+
+template<class T, class U> shared_ptr<T> shared_static_cast(shared_ptr<U> const & r)
+{
+    return shared_ptr<T>(r, boost::detail::static_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_dynamic_cast(shared_ptr<U> const & r)
+{
+    return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_polymorphic_cast(shared_ptr<U> const & r)
+{
+    return shared_ptr<T>(r, boost::detail::polymorphic_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_polymorphic_downcast(shared_ptr<U> const & r)
 {
    BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());
    return shared_static_cast<T>(r);
@@ -318,38 +597,154 @@ template<typename T, typename U> shared_ptr<T> shared_polymorphic_downcast(share

 // get_pointer() enables boost::mem_fn to recognize shared_ptr

-template<typename T> inline T * get_pointer(shared_ptr<T> const & p)
+template<class T> inline T * get_pointer(shared_ptr<T> const & p)
 {
    return p.get();
 }

-// shared_from_this() creates a shared_ptr from a raw pointer (usually 'this')
+// operator<<

-namespace detail
-{
+#if !defined(BOOST_NO_IOSTREAM)

-inline void sp_assert_counted_base(boost::counted_base const *)
+#if defined(BOOST_NO_TEMPLATED_IOSTREAMS) || ( defined(__GNUC__) &&  (__GNUC__ < 3) )
+
+template<class Y> std::ostream & operator<< (std::ostream & os, shared_ptr<Y> const & p)
 {
+    os << p.get();
+    return os;
 }

-template<class T> inline T * sp_remove_const(T const * p)
+#else
+
+// in STLport's no-iostreams mode no iostream symbols can be used
+#ifndef _STLP_NO_IOSTREAMS
+
+# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
+// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
+using std::basic_ostream;
+template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, shared_ptr<Y> const & p)
+# else
+template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p)
+# endif
 {
-    return const_cast<T *>(p);
+    os << p.get();
+    return os;
 }

-} // namespace detail
+#endif // _STLP_NO_IOSTREAMS

-template<class T> shared_ptr<T> shared_from_this(T * p)
+#endif // __GNUC__ < 3
+
+#endif // !defined(BOOST_NO_IOSTREAM)
+
+// get_deleter
+
+#if ( defined(__GNUC__) && BOOST_WORKAROUND(__GNUC__, < 3) ) || \
+    ( defined(__EDG_VERSION__) && BOOST_WORKAROUND(__EDG_VERSION__, <= 238) ) || \
+    ( defined(__HP_aCC) && BOOST_WORKAROUND(__HP_aCC, <= 33500) )
+
+// g++ 2.9x doesn't allow static_cast<X const *>(void *)
+// apparently EDG 2.38 and HP aCC A.03.35 also don't accept it
+
+template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
 {
-    detail::sp_assert_counted_base(p);
-    return shared_ptr<T>(detail::sp_remove_const(p));
+    void const * q = p._internal_get_deleter(BOOST_SP_TYPEID(D));
+    return const_cast<D *>(static_cast<D const *>(q));
 }

+#else
+
+template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
+{
+    return static_cast<D *>(p._internal_get_deleter(BOOST_SP_TYPEID(D)));
+}
+
+#endif
+
+// atomic access
+
+#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
+
+template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ )
+{
+    return false;
+}
+
+template<class T> shared_ptr<T> atomic_load( shared_ptr<T> const * p )
+{
+    boost::detail::spinlock_pool<2>::scoped_lock lock( p );
+    return *p;
+}
+
+template<class T> inline shared_ptr<T> atomic_load_explicit( shared_ptr<T> const * p, memory_order /*mo*/ )
+{
+    return atomic_load( p );
+}
+
+template<class T> void atomic_store( shared_ptr<T> * p, shared_ptr<T> r )
+{
+    boost::detail::spinlock_pool<2>::scoped_lock lock( p );
+    p->swap( r );
+}
+
+template<class T> inline void atomic_store_explicit( shared_ptr<T> * p, shared_ptr<T> r, memory_order /*mo*/ )
+{
+    atomic_store( p, r ); // std::move( r )
+}
+
+template<class T> shared_ptr<T> atomic_exchange( shared_ptr<T> * p, shared_ptr<T> r )
+{
+    boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );
+
+    sp.lock();
+    p->swap( r );
+    sp.unlock();
+
+    return r; // return std::move( r )
+}
+
+template<class T> shared_ptr<T> atomic_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> r, memory_order /*mo*/ )
+{
+    return atomic_exchange( p, r ); // std::move( r )
+}
+
+template<class T> bool atomic_compare_exchange( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w )
+{
+    boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );
+
+    sp.lock();
+
+    if( p->_internal_equiv( *v ) )
+    {
+        p->swap( w );
+
+        sp.unlock();
+
+        return true;
+    }
+    else
+    {
+        shared_ptr<T> tmp( *p );
+
+        sp.unlock();
+
+        tmp.swap( *v );
+        return false;
+    }
+}
+
+template<class T> inline bool atomic_compare_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w, memory_order /*success*/, memory_order /*failure*/ )
+{
+    return atomic_compare_exchange( p, v, w ); // std::move( w )
+}
+
+#endif
+
 } // namespace boost

 #ifdef BOOST_MSVC
 # pragma warning(pop)
-#endif    
+#endif

 #endif  // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)

--- a/include/boost/smart_ptr.hpp
+++ b/include/boost/smart_ptr.hpp
@@ -1,9 +1,25 @@
-//  Boost smart_ptr.hpp header file  -----------------------------------------//
+//
+//  smart_ptr.hpp
+//
+//  For convenience, this header includes the rest of the smart
+//  pointer library headers.
+//
+//  Copyright (c) 2003 Peter Dimov  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+//  http://www.boost.org/libs/smart_ptr/smart_ptr.htm
+//

-// For compatibility, this header includes the header for the four "classic"
-// smart pointer class templates.
+#include <boost/config.hpp>

-#include <boost/scoped_ptr.hpp> 
+#include <boost/scoped_ptr.hpp>
 #include <boost/scoped_array.hpp>
 #include <boost/shared_ptr.hpp>
 #include <boost/shared_array.hpp>
+
+#if !defined(BOOST_NO_MEMBER_TEMPLATES) || defined(BOOST_MSVC6_MEMBER_TEMPLATES)
+# include <boost/weak_ptr.hpp>
+# include <boost/intrusive_ptr.hpp>
+# include <boost/enable_shared_from_this.hpp>
+#endif
--- a/include/boost/weak_ptr.hpp
+++ b/include/boost/weak_ptr.hpp
@@ -4,16 +4,17 @@
 //
 //  weak_ptr.hpp
 //
-//  Copyright (c) 2001, 2002 Peter Dimov
+//  Copyright (c) 2001, 2002, 2003 Peter Dimov
 //
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
 //
 //  See http://www.boost.org/libs/smart_ptr/weak_ptr.htm for documentation.
 //

+#include <memory> // boost.TR1 include order fix
+#include <boost/detail/shared_count.hpp>
 #include <boost/shared_ptr.hpp>

 #ifdef BOOST_MSVC  // moved here to work around VC++ compiler crash
@@ -24,7 +25,7 @@
 namespace boost
 {

-template<typename T> class weak_ptr
+template<class T> class weak_ptr
 {
 private:

@@ -35,33 +36,70 @@ public:

    typedef T element_type;

-    weak_ptr(): px(0), pn()
+    weak_ptr(): px(0), pn() // never throws in 1.30+
    {
    }

 //  generated copy constructor, assignment, destructor are fine

-    template<typename Y>
-    weak_ptr(weak_ptr<Y> const & r): px(r.px), pn(r.pn) // never throws
+
+//
+//  The "obvious" converting constructor implementation:
+//
+//  template<class Y>
+//  weak_ptr(weak_ptr<Y> const & r): px(r.px), pn(r.pn) // never throws
+//  {
+//  }
+//
+//  has a serious problem.
+//
+//  r.px may already have been invalidated. The px(r.px)
+//  conversion may require access to *r.px (virtual inheritance).
+//
+//  It is not possible to avoid spurious access violations since
+//  in multithreaded programs r.px may be invalidated at any point.
+//
+
+    template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+    weak_ptr( weak_ptr<Y> const & r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+    weak_ptr( weak_ptr<Y> const & r )
+
+#endif
+    : pn(r.pn) // never throws
+    {
+        px = r.lock().get();
+    }
+
+    template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+    weak_ptr( shared_ptr<Y> const & r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+    weak_ptr( shared_ptr<Y> const & r )
+
+#endif
+    : px( r.px ), pn( r.pn ) // never throws
    {
    }

-    template<typename Y>
-    weak_ptr(shared_ptr<Y> const & r): px(r.px), pn(r.pn) // never throws
-    {
-    }
+#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1300)

-#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1200)
-
-    template<typename Y>
+    template<class Y>
    weak_ptr & operator=(weak_ptr<Y> const & r) // never throws
    {
-        px = r.px;
+        px = r.lock().get();
        pn = r.pn;
        return *this;
    }

-    template<typename Y>
+    template<class Y>
    weak_ptr & operator=(shared_ptr<Y> const & r) // never throws
    {
        px = r.px;
@@ -71,14 +109,9 @@ public:

 #endif

-    void reset()
+    shared_ptr<T> lock() const // never throws
    {
-        this_type().swap(*this);
-    }
-
-    T * get() const // never throws; deprecated, removal pending, don't use
-    {
-        return pn.use_count() == 0? 0: px;
+        return shared_ptr<element_type>( *this, boost::detail::sp_nothrow_tag() );
    }

    long use_count() const // never throws
@@ -91,13 +124,24 @@ public:
        return pn.use_count() == 0;
    }

+    void reset() // never throws in 1.30+
+    {
+        this_type().swap(*this);
+    }
+
    void swap(this_type & other) // never throws
    {
        std::swap(px, other.px);
        pn.swap(other.pn);
    }

-    bool less(this_type const & rhs) const // implementation detail, never throws
+    void _internal_assign(T * px2, boost::detail::shared_count const & pn2)
+    {
+        px = px2;
+        pn = pn2;
+    }
+
+    template<class Y> bool _internal_less(weak_ptr<Y> const & rhs) const
    {
        return pn < rhs.pn;
    }
@@ -109,40 +153,19 @@ public:

 private:

-    template<typename Y> friend class weak_ptr;
-    template<typename Y> friend class shared_ptr;
+    template<class Y> friend class weak_ptr;
+    template<class Y> friend class shared_ptr;

 #endif

-    T * px;                     // contained pointer
-    detail::weak_count pn;      // reference counter
+    T * px;                       // contained pointer
+    boost::detail::weak_count pn; // reference counter

 };  // weak_ptr

-template<class T, class U> inline bool operator==(weak_ptr<T> const & a, weak_ptr<U> const & b)
+template<class T, class U> inline bool operator<(weak_ptr<T> const & a, weak_ptr<U> const & b)
 {
-    return a.get() == b.get();
-}
-
-template<class T, class U> inline bool operator!=(weak_ptr<T> const & a, weak_ptr<U> const & b)
-{
-    return a.get() != b.get();
-}
-
-#if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
-
-// Resolve the ambiguity between our op!= and the one in rel_ops
-
-template<typename T> inline bool operator!=(weak_ptr<T> const & a, weak_ptr<T> const & b)
-{
-    return a.get() != b.get();
-}
-
-#endif
-
-template<class T> inline bool operator<(weak_ptr<T> const & a, weak_ptr<T> const & b)
-{
-    return a.less(b);
+    return a._internal_less(b);
 }

 template<class T> void swap(weak_ptr<T> & a, weak_ptr<T> & b)
@@ -150,28 +173,6 @@ template<class T> void swap(weak_ptr<T> & a, weak_ptr<T> & b)
    a.swap(b);
 }

-template<class T> shared_ptr<T> make_shared(weak_ptr<T> const & r) // never throws
-{
-    // optimization: avoid throw overhead
-    if(r.use_count() == 0)
-    {
-        return shared_ptr<T>();
-    }
-
-    try
-    {
-        return shared_ptr<T>(r);
-    }
-    catch(use_count_is_zero const &)
-    {
-        return shared_ptr<T>();
-    }
-}
-
-// Note: there is no get_pointer overload for weak_ptr.
-// This is intentional. Even get() will disappear in a
-// future release; these accessors are too error-prone.
-
 } // namespace boost

 #ifdef BOOST_MSVC
--- a/index.htm
+++ b/index.htm
@@ -1,47 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-
-<html>
-
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
-<title>Boost Smart Pointer Library</title>
-</head>
-
-<body bgcolor="#FFFFFF" text="#000000">
-
-<table border="1" bgcolor="#007F7F" cellpadding="2">
-  <tr>
-    <td bgcolor="#FFFFFF"><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" width="277" height="86"></td>
-    <td><a href="../../index.htm"><font face="Arial" color="#FFFFFF"><big>Home</big></font></a></td>
-    <td><a href="../libraries.htm"><font face="Arial" color="#FFFFFF"><big>Libraries</big></font></a></td>
-    <td><a href="../../people/people.htm"><font face="Arial" color="#FFFFFF"><big>People</big></font></a></td>
-    <td><a href="../../more/faq.htm"><font face="Arial" color="#FFFFFF"><big>FAQ</big></font></a></td>
-    <td><a href="../../more/index.htm"><font face="Arial" color="#FFFFFF"><big>More</big></font></a></td>
-  </tr>
-</table>
-<h1>Smart Pointer Library</h1>
-<p>The smart pointer library includes five smart pointer class templates. Smart
-pointers ease the management of memory dynamically allocated with C++ <b>new</b>
-expressions. In addition, <b>scoped_ptr</b> can ease the management of memory
-dynamically allocated in other ways.</p>
-<ul>
-  <li><a href="smart_ptr.htm">Documentation</a> (HTML).</li>
-  <li>Header <a href="../../boost/scoped_ptr.hpp">scoped_ptr.hpp</a>.</li>
-  <li>Header <a href="../../boost/scoped_array.hpp">scoped_array.hpp</a>.</li>
-  <li>Header <a href="../../boost/shared_ptr.hpp">shared_ptr.hpp</a>.</li>
-  <li>Header <a href="../../boost/shared_array.hpp">shared_array.hpp</a>.</li>
-  <li>Header <a href="../../boost/weak_ptr.hpp">weak_ptr.hpp</a>.</li>
-  <li>Test program <a href="smart_ptr_test.cpp">smart_ptr_test.cpp</a>.</li>
-  <li>Originally submitted by
-  	<a href="../../people/greg_colvin.htm">Greg Colvin</a> and
-  	<a href="../../people/beman_dawes.html">Beman Dawes</a>,
-  	currently maintained by
-  	<a href="../../people/peter_dimov.htm">Peter Dimov</a> and
-  	<a href="../../people/darin_adler.htm">Darin Adler</a>.</li>
-</ul>
-
-<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan -->1 February 2002<!--webbot bot="Timestamp" endspan i-checksum="14885" -->.</p>
-
-</body>
-
-</html>
--- a/index.html
+++ b/index.html
@@ -0,0 +1,15 @@
+<html>
+<head>
+<meta http-equiv="refresh" content="0; URL=smart_ptr.htm">
+</head>
+<body>
+Automatic redirection failed, please go to
+<a href="smart_ptr.htm">smart_ptr.htm</a>.
+</body>
+</html>
+<!--
+	<09> Copyright Beman Dawes, 2001
+	Distributed under the Boost Software License, Version 1.0.
+	See accompanying file LICENSE_1_0.txt or copy at
+	http://www.boost.org/LICENSE_1_0.txt
+-->
--- a/intrusive_ptr.html
+++ b/intrusive_ptr.html
@@ -0,0 +1,297 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+	<head>
+		<title>intrusive_ptr</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body text="#000000" bgColor="#ffffff">
+		<h1><A href="../../index.htm"><IMG height="86" alt="boost.png (6897 bytes)" src="../../boost.png" width="277" align="middle"
+					border="0"></A>intrusive_ptr class template</h1>
+		<p>
+			<A href="#Introduction">Introduction</A><br>
+			<A href="#Synopsis">Synopsis</A><br>
+			<A href="#Members">Members</A><br>
+			<A href="#functions">Free Functions</A><br>
+		</p>
+		<h2><a name="Introduction">Introduction</a></h2>
+		<p>The <b>intrusive_ptr</b> class template stores a pointer to an object with an 
+			embedded reference count. Every new <b>intrusive_ptr</b> instance increments 
+			the reference count by using an unqualified call to the function <STRONG>intrusive_ptr_add_ref</STRONG>, 
+			passing it the pointer as an argument. Similarly, when an <STRONG>intrusive_ptr</STRONG>
+			is destroyed, it calls <STRONG>intrusive_ptr_release</STRONG>; this function is 
+			responsible for destroying the object when its reference count drops to zero. 
+			The user is expected to provide suitable definitions of these two functions. On 
+			compilers that support argument-dependent lookup, <STRONG>intrusive_ptr_add_ref</STRONG>
+			and <STRONG>intrusive_ptr_release</STRONG> should be defined in the namespace 
+			that corresponds to their parameter; otherwise, the definitions need to go in 
+			namespace <STRONG>boost</STRONG>.</p>
+		<p>The class template is parameterized on <b>T</b>, the type of the object pointed 
+			to. <STRONG>intrusive_ptr&lt;T&gt;</STRONG> can be implicitly converted to <STRONG>intrusive_ptr&lt;U&gt;</STRONG>
+			whenever <STRONG>T*</STRONG> can be implicitly converted to <STRONG>U*</STRONG>.</p>
+		<P>The main reasons to use <STRONG>intrusive_ptr</STRONG> are:</P>
+		<UL>
+			<LI>
+			Some existing frameworks or OSes provide objects with embedded reference 
+			counts;
+			<LI>
+				The memory footprint of <STRONG>intrusive_ptr</STRONG>
+			is the same as the corresponding raw pointer;
+			<LI>
+				<STRONG>intrusive_ptr&lt;T&gt;</STRONG> can be constructed from an arbitrary 
+				raw pointer of type <STRONG>T *</STRONG>.</LI></UL>
+		<P>As a general rule, if it isn't obvious whether <STRONG>intrusive_ptr</STRONG> better 
+			fits your needs than <STRONG>shared_ptr</STRONG>, try a <STRONG>shared_ptr</STRONG>-based 
+			design first.</P>
+		<h2><a name="Synopsis">Synopsis</a></h2>
+		<pre>namespace boost {
+
+  template&lt;class T&gt; class intrusive_ptr {
+
+    public:
+
+      typedef T <A href="#element_type" >element_type</A>;
+
+      <A href="#constructors" >intrusive_ptr</A>(); // never throws
+      <A href="#constructors" >intrusive_ptr</A>(T * p, bool add_ref = true);
+
+      <A href="#constructors" >intrusive_ptr</A>(intrusive_ptr const &amp; r);
+      template&lt;class Y&gt; <A href="#constructors" >intrusive_ptr</A>(intrusive_ptr&lt;Y&gt; const &amp; r);
+
+      <A href="#destructor" >~intrusive_ptr</A>();
+
+      intrusive_ptr &amp; <A href="#assignment" >operator=</A>(intrusive_ptr const &amp; r);
+      template&lt;class Y&gt; intrusive_ptr &amp; <A href="#assignment" >operator=</A>(intrusive_ptr&lt;Y&gt; const &amp; r);
+      intrusive_ptr &amp; <A href="#assignment" >operator=</A>(T * r);
+
+      void <a href="#reset" >reset</a>();
+      void <a href="#reset" >reset</a>(T * r);
+
+      T &amp; <A href="#indirection" >operator*</A>() const; // never throws
+      T * <A href="#indirection" >operator-&gt;</A>() const; // never throws
+      T * <A href="#get" >get</A>() const; // never throws
+
+      operator <A href="#conversions" ><i>unspecified-bool-type</i></A>() const; // never throws
+
+      void <A href="#swap" >swap</A>(intrusive_ptr &amp; b); // never throws
+  };
+
+  template&lt;class T, class U&gt;
+    bool <A href="#comparison" >operator==</A>(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws
+
+  template&lt;class T, class U&gt;
+    bool <A href="#comparison" >operator!=</A>(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws
+
+  template&lt;class T&gt;
+    bool <A href="#comparison" >operator==</A>(intrusive_ptr&lt;T&gt; const &amp; a, T * b); // never throws
+
+  template&lt;class T&gt;
+    bool <A href="#comparison" >operator!=</A>(intrusive_ptr&lt;T&gt; const &amp; a, T * b); // never throws
+
+  template&lt;class T&gt;
+    bool <A href="#comparison" >operator==</A>(T * a, intrusive_ptr&lt;T&gt; const &amp; b); // never throws
+
+  template&lt;class T&gt;
+    bool <A href="#comparison" >operator!=</A>(T * a, intrusive_ptr&lt;T&gt; const &amp; b); // never throws
+
+  template&lt;class T, class U&gt;
+    bool <A href="#comparison" >operator&lt;</A>(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws
+
+  template&lt;class T&gt; void <A href="#free-swap" >swap</A>(intrusive_ptr&lt;T&gt; &amp; a, intrusive_ptr&lt;T&gt; &amp; b); // never throws
+
+  template&lt;class T&gt; T * <A href="#get_pointer" >get_pointer</A>(intrusive_ptr&lt;T&gt; const &amp; p); // never throws
+
+  template&lt;class T, class U&gt;
+    intrusive_ptr&lt;T&gt; <A href="#static_pointer_cast" >static_pointer_cast</A>(intrusive_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class T, class U&gt;
+    intrusive_ptr&lt;T&gt; <A href="#const_pointer_cast" >const_pointer_cast</A>(intrusive_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class T, class U&gt;
+    intrusive_ptr&lt;T&gt; <A href="#dynamic_pointer_cast" >dynamic_pointer_cast</A>(intrusive_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class E, class T, class Y&gt;
+    std::basic_ostream&lt;E, T&gt; &amp; <A href="#insertion-operator" >operator&lt;&lt;</A> (std::basic_ostream&lt;E, T&gt; &amp; os, intrusive_ptr&lt;Y&gt; const &amp; p);
+
+}</pre>
+		<h2><a name="Members">Members</a></h2>
+		<h3><a name="element_type">element_type</a></h3>
+		<pre>typedef T element_type;</pre>
+		<blockquote>
+			<p>Provides the type of the template parameter T.</p>
+		</blockquote>
+		<h3><a name="constructors">constructors</a></h3>
+		<pre>intrusive_ptr(); // never throws</pre>
+		<blockquote>
+			<p><b>Postconditions:</b> <code>get() == 0</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>intrusive_ptr(T * p, bool add_ref = true);</pre>
+		<blockquote>
+			<p><b>Effects:</b> <code>if(p != 0 &amp;&amp; add_ref) intrusive_ptr_add_ref(p);</code>.</p>
+			<p><b>Postconditions:</b> <code>get() == p</code>.</p>
+		</blockquote>
+		<pre>intrusive_ptr(intrusive_ptr const &amp; r);
+template&lt;class Y&gt; intrusive_ptr(intrusive_ptr&lt;Y&gt; const &amp; r);</pre>
+		<blockquote>
+			<p><b>Effects:</b> <code>if(r.get() != 0) intrusive_ptr_add_ref(r.get());</code>.</p>
+			<p><b>Postconditions:</b> <code>get() == r.get()</code>.</p>
+		</blockquote>
+		<h3><a name="destructor">destructor</a></h3>
+		<pre>~intrusive_ptr();</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> <code>if(get() != 0) intrusive_ptr_release(get());</code>.</P>
+		</BLOCKQUOTE>
+		<H3><a name="assignment">assignment</a></H3>
+		<pre>intrusive_ptr &amp; operator=(intrusive_ptr const &amp; r);
+template&lt;class Y&gt; intrusive_ptr &amp; operator=(intrusive_ptr&lt;Y&gt; const &amp; r);
+intrusive_ptr &amp; operator=(T * r);</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>intrusive_ptr(r).swap(*this)</code>.</P>
+			<P><B>Returns:</B> <code>*this</code>.</P>
+		</BLOCKQUOTE>
+		<H3><a name="reset">reset</a></H3>
+		<pre>void reset();</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>intrusive_ptr().swap(*this)</code>.</P>
+		</BLOCKQUOTE>
+		<pre>void reset(T * r);</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>intrusive_ptr(r).swap(*this)</code>.</P>
+		</BLOCKQUOTE>
+		<h3><a name="indirection">indirection</a></h3>
+		<pre>T &amp; operator*() const; // never throws</pre>
+		<blockquote>
+			<p><b>Requirements:</b> <code>get() != 0</code>.</p>
+			<p><b>Returns:</b> <code>*get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>T * operator-&gt;() const; // never throws</pre>
+		<blockquote>
+			<p><b>Requirements:</b> <code>get() != 0</code>.</p>
+			<p><b>Returns:</b> <code>get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<h3><a name="get">get</a></h3>
+		<pre>T * get() const; // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> the stored pointer.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<h3><a name="conversions">conversions</a></h3>
+		<pre>operator <i>unspecified-bool-type</i> () const; // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> an unspecified value that, when used in boolean contexts, is 
+				equivalent to <code>get() != 0</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+			<P><B>Notes:</B> This conversion operator allows <b>intrusive_ptr</b> objects to be 
+				used in boolean contexts, like <code>if (p &amp;&amp; p-&gt;valid()) {}</code>. 
+				The actual target type is typically a pointer to a member function, avoiding 
+				many of the implicit conversion pitfalls.</P>
+		</blockquote>
+		<h3><a name="swap">swap</a></h3>
+		<pre>void swap(intrusive_ptr &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Effects:</b> Exchanges the contents of the two smart pointers.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<h2><a name="functions">Free Functions</a></h2>
+		<h3><a name="comparison">comparison</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  bool operator==(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a.get() == b.get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator!=(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a.get() != b.get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator==(intrusive_ptr&lt;T&gt; const &amp; a, U * b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a.get() == b</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator!=(intrusive_ptr&lt;T&gt; const &amp; a, U * b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a.get() != b</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator==(T * a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a == b.get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator!=(T * a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>a != b.get()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class T, class U&gt;
+  bool operator&lt;(intrusive_ptr&lt;T&gt; const &amp; a, intrusive_ptr&lt;U&gt; const &amp; b); // never throws</pre>
+		<blockquote>
+			<p><b>Returns:</b> <code>std::less&lt;T *&gt;()(a.get(), b.get())</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+			<P><B>Notes:</B> Allows <STRONG>intrusive_ptr</STRONG> objects to be used as keys 
+				in associative containers.</P>
+		</blockquote>
+		<h3><a name="free-swap">swap</a></h3>
+		<pre>template&lt;class T&gt;
+  void swap(intrusive_ptr&lt;T&gt; &amp; a, intrusive_ptr&lt;T&gt; &amp; b); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>a.swap(b)</code>.</P>
+			<P><B>Throws:</B> nothing.</P>
+			<P><B>Notes:</B> Matches the interface of <B>std::swap</B>. Provided as an aid to 
+				generic programming.</P>
+		</BLOCKQUOTE>
+		<h3><a name="get_pointer">get_pointer</a></h3>
+		<pre>template&lt;class T&gt;
+  T * get_pointer(intrusive_ptr&lt;T&gt; const &amp; p); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><B>Returns:</B> <code>p.get()</code>.</P>
+			<P><B>Throws:</B> nothing.</P>
+			<P><B>Notes:</B> Provided as an aid to generic programming. Used by <A href="../bind/mem_fn.html">
+					mem_fn</A>.</P>
+		</BLOCKQUOTE>
+		<h3><a name="static_pointer_cast">static_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  intrusive_ptr&lt;T&gt; static_pointer_cast(intrusive_ptr&lt;U&gt; const &amp; r); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><B>Returns:</B> <code>intrusive_ptr&lt;T&gt;(static_cast&lt;T*&gt;(r.get()))</code>.</P>
+			<P><B>Throws:</B> nothing.</P>
+		</BLOCKQUOTE>
+		<h3><a name="const_pointer_cast">const_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  intrusive_ptr&lt;T&gt; const_pointer_cast(intrusive_ptr&lt;U&gt; const &amp; r); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><B>Returns:</B> <code>intrusive_ptr&lt;T&gt;(const_cast&lt;T*&gt;(r.get()))</code>.</P>
+			<P><B>Throws:</B> nothing.</P>
+		</BLOCKQUOTE>
+		<h3><a name="dynamic_pointer_cast">dynamic_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  intrusive_ptr&lt;T&gt; dynamic_pointer_cast(intrusive_ptr&lt;U&gt; const &amp; r);</pre>
+		<BLOCKQUOTE>
+			<P><B>Returns:</B> <code>intrusive_ptr&lt;T&gt;(dynamic_cast&lt;T*&gt;(r.get()))</code>.</P>
+			<P><B>Throws:</B> nothing.</P>
+		</BLOCKQUOTE>
+		<h3><a name="insertion-operator">operator&lt;&lt;</a></h3>
+		<pre>template&lt;class E, class T, class Y&gt;
+    std::basic_ostream&lt;E, T&gt; &amp; operator&lt;&lt; (std::basic_ostream&lt;E, T&gt; &amp; os, intrusive_ptr&lt;Y&gt; const &amp; p);</pre>
+		<BLOCKQUOTE>
+			<p><STRONG>Effects:</STRONG> <code>os &lt;&lt; p.get();</code>.</p>
+			<P><B>Returns:</B> <code>os</code>.</P>
+		</BLOCKQUOTE>
+		<hr>
+		<p>
+			$Date$</p>
+		<p>
+			<small>Copyright <20> 2003-2005 Peter Dimov. Distributed under the Boost Software License, Version 
+				1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+				copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
+	</body>
+</html>
--- a/pointer_cast.html
+++ b/pointer_cast.html
@@ -0,0 +1,105 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
+<html>
+	<head>
+		<title>pointer_cast.hpp</title>
+	</head>
+	<body>
+		<h1><IMG height="86" alt="C++ Boost" src="../../boost.png" width="277" align="middle" border="0">Pointer 
+			cast functions</h1>
+		<p>The pointer cast functions (<code>boost::static_pointer_cast</code> <code>boost::dynamic_pointer_cast</code>
+			<code>boost::reinterpret_pointer_cast</code> <code>boost::const_pointer_cast</code>) 
+			provide a way to write generic pointer castings for raw pointers. The functions 
+			are defined in <CITE><A href="../../boost/pointer_cast.hpp">boost/pointer_cast.hpp</A>.</CITE></p>
+		<P>There is test/example code in <CITE><A href="test/pointer_cast_test.cpp">pointer_cast_test.cpp</A></CITE>.</p>
+			<h2><a name="rationale">Rationale</a></h2>
+		<P>Boost smart pointers usually overload those functions to provide a mechanism to 
+			emulate pointers casts. For example, <code>boost::shared_ptr&lt;...&gt;</code> implements 
+			a static pointer cast this way:</P>
+		<pre>
+template&lt;class T, class U&gt;
+    shared_ptr&lt;T&gt; static_pointer_cast(shared_ptr&lt;U&gt; const &amp;r);
+</pre>
+		<P>Pointer cast functions from <CITE><A href="../../boost/pointer_cast.hpp">boost/pointer_cast.hpp</A></CITE>
+			are overloads of <code>boost::static_pointer_cast</code>, <code>boost::dynamic_pointer_cast</code>,
+			<code>boost::reinterpret_pointer_cast</code> and <code>boost::const_pointer_cast</code>
+			for raw pointers. This way when developing pointer type independent classes, 
+			for example, memory managers or shared memory compatible classes, the same code 
+			can be used for raw and smart pointers.</p>
+			<H2><A name="synopsis">Synopsis</A></H2>
+			<BLOCKQUOTE>
+				<PRE>
+namespace boost {
+
+template&lt;class T, class U&gt;
+inline T* static_pointer_cast(U *ptr)
+  { return static_cast&lt;T*&gt;(ptr); }
+
+template&lt;class T, class U&gt;
+inline T* dynamic_pointer_cast(U *ptr)
+  { return dynamic_cast&lt;T*&gt;(ptr); }
+
+template&lt;class T, class U&gt;
+inline T* const_pointer_cast(U *ptr)
+  { return const_cast&lt;T*&gt;(ptr); }
+
+template&lt;class T, class U&gt;
+inline T* reinterpret_pointer_cast(U *ptr)
+  { return reinterpret_cast&lt;T*&gt;(ptr); }
+  
+} // namespace boost
+</PRE>
+			</BLOCKQUOTE>
+		<P>As you can see from the above synopsis, the pointer cast functions are just 
+			wrappers around standard C++ cast operators.</P>
+		<H2><A name="example">Example</A></H2>
+		<BLOCKQUOTE>
+			<PRE>
+#include &lt;boost/pointer_cast.hpp&gt;
+#include &lt;boost/shared_ptr.hpp&gt;
+
+class base
+{
+public:
+
+   virtual ~base()
+   {
+   }
+};
+
+class derived: public base
+{
+};
+
+template &lt;class BasePtr&gt;
+void check_if_it_is_derived(const BasePtr &amp;ptr)
+{
+   assert(boost::dynamic_pointer_cast&lt;derived&gt;(ptr) != 0);
+}
+
+int main()
+{
+   <I>// Create a raw and a shared_ptr</I>
+
+   base *ptr = new derived;
+   boost::shared_ptr&lt;base&gt; sptr(new derived);
+   
+   <I>// Check that base pointer points actually to derived class</I>
+
+   check_if_it_is_derived(ptr);
+   check_if_it_is_derived(sptr);
+   
+   // <EM>Ok!</EM>
+   
+   delete ptr;
+   return 0;
+}</PRE>
+		</BLOCKQUOTE>
+		<P>The example demonstrates how the generic pointer casts help us create pointer 
+			independent code.</P>
+		<hr>
+		<p>Revised: $Date$</p>
+		<p>Copyright 2005 Ion Gazta<74>aga. Use, modification, and distribution are subject to 
+			the Boost Software License, Version 1.0. (See accompanying file <A href="../../LICENSE_1_0.txt">
+				LICENSE_1_0.txt</A> or a copy at &lt;<A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>&gt;.)</p>
+	</body>
+</html>
--- a/pointer_to_other.html
+++ b/pointer_to_other.html
@@ -0,0 +1,108 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+	<head>
+		<title>pointer_to_other.hpp</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body bgcolor="#ffffff" text="#000000">
+		<h1><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" WIDTH="277" HEIGHT="86">Header
+			<a href="../../boost/pointer_to_other.hpp">boost/pointer_to_other.hpp</a></h1>
+		<p>
+			The pointer to other utility provides a way, given a source pointer type, 
+			to obtain a pointer of the same type to another pointee type. The utility is 
+			defined in <cite><a href="../../boost/pointer_to_other.hpp">boost/pointer_to_other.hpp</a>.</cite></p>
+		<p>There is test/example code in <cite><a href="test/pointer_to_other_test.cpp">pointer_to_other_test.cpp</a></cite>.</p>
+		<h2><a name="contents">Contents</a></h2>
+		<ul>
+			<li>
+				<a href="#rationale">Rationale</a>
+			<li>
+				<a href="#synopsis">Synopsis</a>
+			<li>
+				<a href="#example">Example</a></li>
+		</ul>
+		<h2><a name="rationale">Rationale</a></h2>
+		<p>When building pointer independent classes, like memory managers, allocators, or 
+			containers, there is often a need to define pointers generically, so that if a 
+			template parameter represents a pointer (for example, a raw or smart pointer to 
+			an int), we can define another pointer of the same type to another pointee (a 
+			raw or smart pointer to a float.)</p>
+		<pre>template &lt;class IntPtr&gt;
+class FloatPointerHolder
+{   
+   <em>// Let's define a pointer to a float</em>
+   typedef typename boost::pointer_to_other
+      &lt;IntPtr, float&gt;::type float_ptr_t;
+   float_ptr_t float_ptr;
+};</pre>
+		<h2><a name="synopsis">Synopsis</a></h2>
+		<pre>
+namespace boost {
+
+template&lt;class T, class U&gt;
+   struct pointer_to_other;
+
+template&lt;class T, class U, template &lt;class&gt; class Sp&gt;
+   struct pointer_to_other&lt; Sp&lt;T&gt;, U &gt;
+{
+   typedef Sp&lt;U&gt; type;
+};
+
+template&lt;class T, class T2, class U,
+        template &lt;class, class&gt; class Sp&gt;
+   struct pointer_to_other&lt; Sp&lt;T, T2&gt;, U &gt;
+{
+   typedef Sp&lt;U, T2&gt; type;
+};
+
+template&lt;class T, class T2, class T3, class U,
+        template &lt;class, class, class&gt; class Sp&gt;
+struct pointer_to_other&lt; Sp&lt;T, T2, T3&gt;, U &gt;
+{
+   typedef Sp&lt;U, T2, T3&gt; type;
+};
+
+template&lt;class T, class U&gt;
+struct pointer_to_other&lt; T*, U &gt; 
+{
+   typedef U* type;
+};
+
+} <em>// namespace boost</em></pre>
+		<p>If these definitions are not correct for a specific smart pointer, we can define 
+			a specialization of pointer_to_other.</p>
+		<h2><a name="example">Example</a></h2>
+		<pre><em>// Let's define a memory allocator that can
+// work with raw and smart pointers</em>
+
+#include &lt;boost/pointer_to_other.hpp&gt;
+
+template &lt;class VoidPtr&gt;
+class memory_allocator
+{<em>
+   // Predefine a memory_block </em>
+   struct block;<em>
+
+   // Define a pointer to a memory_block from a void pointer
+   // If VoidPtr is void *, block_ptr_t is block*
+   // If VoidPtr is smart_ptr&lt;void&gt;, block_ptr_t is smart_ptr&lt;block&gt;</em>
+   typedef typename boost::pointer_to_other      
+            &lt;VoidPtr, block&gt;::type block_ptr_t;
+            
+   struct block
+   {
+      std::size_t size;
+      block_ptr_t next_block;
+   };
+
+   block_ptr_t free_blocks;
+};</pre>
+		<p>As we can see, using pointer_to_other we can create pointer independent code.</p>
+		<hr>
+		<p>Last revised: $Date$</p>
+		<p><small>Copyright 2005, 2006 Ion Gazta<74>aga and Peter Dimov. Use, modification, 
+				and distribution are subject to the Boost Software License, Version 1.0.<br>
+				(See accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or a 
+				copy at &lt; <a href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>&gt;.)</small></p>
+	</body>
+</html>
--- a/scoped_array.htm
+++ b/scoped_array.htm
@@ -5,8 +5,8 @@
 		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 	</head>
 	<body bgcolor="#ffffff" text="#000000">
-		<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" width="277" height="86"><a name="scoped_array">scoped_array</a>
-			class template</h1>
+		<h1><A href="../../index.htm"><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86"
+					border="0"></A>scoped_array class template</h1>
 		<p>The <b>scoped_array</b> class template stores a pointer to a dynamically 
 			allocated array. (Dynamically allocated arrays are allocated with the C++ <b>new[]</b>
 			expression.) The array pointed to is guaranteed to be deleted, either on 
@@ -14,9 +14,9 @@
 		<p>The <b>scoped_array</b> template is a simple solution for simple needs. It 
 			supplies a basic "resource acquisition is initialization" facility, without 
 			shared-ownership or transfer-of-ownership semantics. Both its name and 
-			enforcement of semantics (by being <a href="../utility/utility.htm#class noncopyable">
+			enforcement of semantics (by being <a href="../utility/utility.htm#Class_noncopyable">
 				noncopyable</a>) signal its intent to retain ownership solely within the 
-			current scope. Because it is <a href="../utility/utility.htm#class noncopyable">noncopyable</a>, 
+			current scope. Because it is <a href="../utility/utility.htm#Class_noncopyable">noncopyable</a>, 
 			it is safer than <b>shared_array</b> for pointers which should not be copied.</p>
 		<p>Because <b>scoped_array</b> is so simple, in its usual implementation every 
 			operation is as fast as a built-in array pointer and it has no more space 
@@ -29,28 +29,30 @@
 			heavier duty but far more flexible. A <b>boost::array</b> is an alternative 
 			that does not use dynamic allocation.</p>
 		<p>The class template is parameterized on <b>T</b>, the type of the object pointed 
-			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#Common requirements">
+			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
 		<h2>Synopsis</h2>
 		<pre>namespace boost {

-  template&lt;typename T&gt; class scoped_array : <a href="../utility/utility.htm#noncopyable">noncopyable</a> {
+  template&lt;class T&gt; class scoped_array : <a href="../utility/utility.htm#Class_noncopyable">noncopyable</a> {

    public:
      typedef T <a href="#element_type">element_type</a>;

      explicit <a href="#ctor">scoped_array</a>(T * p = 0); // never throws
-      <a href="#~scoped_array">~scoped_array</a>(); // never throws
+      <a href="#destructor">~scoped_array</a>(); // never throws

      void <a href="#reset">reset</a>(T * p = 0); // never throws

      T &amp; <a href="#operator[]">operator[]</a>(std::ptrdiff_t i) const; // never throws
      T * <a href="#get">get</a>() const; // never throws
     
+      operator <A href="#conversions" ><i>unspecified-bool-type</i></A>() const; // never throws
+
      void <a href="#swap">swap</a>(scoped_array &amp; b); // never throws
  };

-  template&lt;typename T&gt; void <a href="#free-swap">swap</a>(scoped_array&lt;T&gt; &amp; a, scoped_array&lt;T&gt; &amp; b); // never throws
+  template&lt;class T&gt; void <a href="#free-swap">swap</a>(scoped_array&lt;T&gt; &amp; a, scoped_array&lt;T&gt; &amp; b); // never throws

 }</pre>
 		<h2>Members</h2>
@@ -62,23 +64,23 @@
 		<pre>explicit scoped_array(T * p = 0); // never throws</pre>
 		<p>Constructs a <b>scoped_array</b>, storing a copy of <b>p</b>, which must have 
 			been allocated via a C++ <b>new</b>[] expression or be 0. <b>T</b> is not 
-			required be a complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">
+			required be a complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
-		<h3><a name="~scoped_array">destructor</a></h3>
+		<h3><a name="destructor">destructor</a></h3>
 		<pre>~scoped_array(); // never throws</pre>
 		<p>Deletes the array pointed to by the stored pointer. Note that <b>delete[]</b> on 
 			a pointer with a value of 0 is harmless. The guarantee that this does not throw 
 			exceptions depends on the requirement that the deleted array's objects' 
-			destructors do not throw exceptions. See the smart pointer <a href="smart_ptr.htm#Common requirements">
+			destructors do not throw exceptions. See the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
 		<h3><a name="reset">reset</a></h3>
 		<pre>void reset(T * p = 0); // never throws</pre>
-		<p>If p is not equal to the stored pointer, deletes the array pointed to by the 
-			stored pointer and then stores a copy of p, which must have been allocated via 
-			a C++ <b>new[]</b> expression or be 0. The guarantee that this does not throw 
-			exceptions depends on the requirement that the deleted array's objects' 
-			destructors do not throw exceptions. See the smart pointer <a href="smart_ptr.htm#Common requirements">
-				common requirements</a>.</p>
+		<p>
+			Deletes the array pointed to by the stored pointer and then stores a copy of p, 
+			which must have been allocated via a C++ <b>new[]</b> expression or be 0. The 
+			guarantee that this does not throw exceptions depends on the requirement that 
+			the deleted array's objects' destructors do not throw exceptions. See the smart 
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
 		<h3><a name="operator[]">subscripting</a></h3>
 		<pre>T &amp; operator[](std::ptrdiff_t i) const; // never throws</pre>
 		<p>Returns a reference to element <b>i</b> of the array pointed to by the stored 
@@ -88,24 +90,27 @@
 		<h3><a name="get">get</a></h3>
 		<pre>T * get() const; // never throws</pre>
 		<p>Returns the stored pointer. <b>T</b> need not be a complete type. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</p>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
+		<h3><a name="conversions">conversions</a></h3>
+		<pre>operator <i>unspecified-bool-type</i> () const; // never throws</pre>
+		<p>Returns an unspecified value that, when used in boolean contexts, is equivalent 
+			to <code>get() != 0</code>.</p>
 		<h3><a name="swap">swap</a></h3>
 		<pre>void swap(scoped_array &amp; b); // never throws</pre>
 		<p>Exchanges the contents of the two smart pointers. <b>T</b> need not be a 
-			complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">common 
+			complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">common 
 				requirements</a>.</p>
 		<h2><a name="functions">Free Functions</a></h2>
 		<h3><a name="free-swap">swap</a></h3>
-		<pre>template&lt;typename T&gt; void swap(scoped_array&lt;T&gt; &amp; a, scoped_array&lt;T&gt; &amp; b); // never throws</pre>
+		<pre>template&lt;class T&gt; void swap(scoped_array&lt;T&gt; &amp; a, scoped_array&lt;T&gt; &amp; b); // never throws</pre>
 		<p>Equivalent to <b>a.swap(b)</b>. Matches the interface of <b>std::swap</b>. 
 			Provided as an aid to generic programming.</p>
 		<hr>
 		<p>Revised <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B %Y" startspan--> 
-			1 February 2002<!--webbot bot="Timestamp" endspan i-checksum="13964"--></p>
-		<p>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
-			Permission to copy, use, modify, sell and distribute this document is granted 
-			provided this copyright notice appears in all copies. This document is provided 
-			"as is" without express or implied warranty, and with no claim as to its 
-			suitability for any purpose.</p>
+			09 January 2003<!--webbot bot="Timestamp" endspan i-checksum="32310"--></p>
+		<p><small>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
+			Copyright 2002-2005 Peter Dimov. Distributed under the Boost Software License, Version 
+			1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+			copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
 	</body>
 </html>
--- a/scoped_ptr.htm
+++ b/scoped_ptr.htm
@@ -5,8 +5,8 @@
 		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 	</head>
 	<body bgcolor="#ffffff" text="#000000">
-		<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" width="277" height="86"><a name="scoped_ptr">scoped_ptr</a>
-			class template</h1>
+		<h1><A href="../../index.htm"><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86"
+					border="0"></A>scoped_ptr class template</h1>
 		<p>The <b>scoped_ptr</b> class template stores a pointer to a dynamically allocated 
 			object. (Dynamically allocated objects are allocated with the C++ <b>new</b> expression.) 
 			The object pointed to is guaranteed to be deleted, either on destruction of the <b>scoped_ptr</b>, 
@@ -14,9 +14,9 @@
 		<p>The <b>scoped_ptr</b> template is a simple solution for simple needs. It 
 			supplies a basic "resource acquisition is initialization" facility, without 
 			shared-ownership or transfer-of-ownership semantics. Both its name and 
-			enforcement of semantics (by being <a href="../utility/utility.htm#class noncopyable">
+			enforcement of semantics (by being <a href="../utility/utility.htm#Class_noncopyable">
 				noncopyable</a>) signal its intent to retain ownership solely within the 
-			current scope. Because it is <a href="../utility/utility.htm#class noncopyable">noncopyable</a>, 
+			current scope. Because it is <a href="../utility/utility.htm#Class_noncopyable">noncopyable</a>, 
 			it is safer than <b>shared_ptr</b> or <b>std::auto_ptr</b> for pointers which 
 			should not be copied.</p>
 		<p>Because <b>scoped_ptr</b> is simple, in its usual implementation every operation 
@@ -29,12 +29,12 @@
 			allocated array. See <a href="scoped_array.htm"><b>scoped_array</b></a> for 
 			that usage.</p>
 		<p>The class template is parameterized on <b>T</b>, the type of the object pointed 
-			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#Common requirements">
+			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
 		<h2>Synopsis</h2>
 		<pre>namespace boost {

-  template&lt;typename T&gt; class scoped_ptr : <a href="../utility/utility.htm#class noncopyable">noncopyable</a> {
+  template&lt;class T&gt; class scoped_ptr : <a href="../utility/utility.htm#Class_noncopyable">noncopyable</a> {

   public:
     typedef T <a href="#element_type">element_type</a>;
@@ -48,10 +48,12 @@
     T * <a href="#indirection">operator-&gt;</a>() const; // never throws
     T * <a href="#get">get</a>() const; // never throws
     
+     operator <A href="#conversions" ><i>unspecified-bool-type</i></A>() const; // never throws
+
     void <a href="#swap">swap</a>(scoped_ptr &amp; b); // never throws
  };

-  template&lt;typename T&gt; void <a href="#free-swap">swap</a>(scoped_ptr&lt;T&gt; &amp; a, scoped_ptr&lt;T&gt; &amp; b); // never throws
+  template&lt;class T&gt; void <a href="#free-swap">swap</a>(scoped_ptr&lt;T&gt; &amp; a, scoped_ptr&lt;T&gt; &amp; b); // never throws

 }</pre>
 		<h2>Members</h2>
@@ -62,7 +64,7 @@
 		<pre>explicit scoped_ptr(T * p = 0); // never throws</pre>
 		<p>Constructs a <b>scoped_ptr</b>, storing a copy of <b>p</b>, which must have been 
 			allocated via a C++ <b>new</b> expression or be 0. <b>T</b> is not required be 
-			a complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">common 
+			a complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">common 
 				requirements</a>.</p>
 		<h3><a name="destructor">destructor</a></h3>
 		<pre>~scoped_ptr(); // never throws</pre>
@@ -71,15 +73,15 @@
 		<P>
 			The guarantee that this does not throw exceptions depends on the requirement 
 			that the deleted object's destructor does not throw exceptions. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</P>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</P>
 		<h3><a name="reset">reset</a></h3>
 		<pre>void reset(T * p = 0); // never throws</pre>
-		<p>If p is not equal to the stored pointer, deletes the object pointed to by the 
-			stored pointer and then stores a copy of p, which must have been allocated via 
-			a C++ <b>new</b> expression or be 0. The guarantee that this does not throw 
-			exceptions depends on the requirement that the deleted object's destructor does 
-			not throw exceptions. See the smart pointer <a href="smart_ptr.htm#Common requirements">
-				common requirements</a>.</p>
+		<p>
+			Deletes the object pointed to by the stored pointer and then stores a copy of 
+			p, which must have been allocated via a C++ <b>new</b> expression or be 0. The 
+			guarantee that this does not throw exceptions depends on the requirement that 
+			the deleted object's destructor does not throw exceptions. See the smart 
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
 		<h3><a name="indirection">indirection</a></h3>
 		<pre>T &amp; operator*() const; // never throws</pre>
 		<p>Returns a reference to the object pointed to by the stored pointer. Behavior is 
@@ -89,15 +91,19 @@
 		<h3><a name="get">get</a></h3>
 		<pre>T * get() const; // never throws</pre>
 		<p>Returns the stored pointer. <b>T</b> need not be a complete type. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</p>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
+		<h3><a name="conversions">conversions</a></h3>
+		<pre>operator <i>unspecified-bool-type</i> () const; // never throws</pre>
+		<p>Returns an unspecified value that, when used in boolean contexts, is equivalent 
+			to <code>get() != 0</code>.</p>
 		<h3><a name="swap">swap</a></h3>
 		<pre>void swap(scoped_ptr &amp; b); // never throws</pre>
 		<p>Exchanges the contents of the two smart pointers. <b>T</b> need not be a 
-			complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">common 
+			complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">common 
 				requirements</a>.</p>
 		<h2><a name="functions">Free Functions</a></h2>
 		<h3><a name="free-swap">swap</a></h3>
-		<pre>template&lt;typename T&gt; void swap(scoped_ptr&lt;T&gt; &amp; a, scoped_ptr&lt;T&gt; &amp; b); // never throws</pre>
+		<pre>template&lt;class T&gt; void swap(scoped_ptr&lt;T&gt; &amp; a, scoped_ptr&lt;T&gt; &amp; b); // never throws</pre>
 		<p>Equivalent to <b>a.swap(b)</b>. Matches the interface of <b>std::swap</b>. 
 			Provided as an aid to generic programming.</p>
 		<h2><a name="example">Example</a></h2>
@@ -115,7 +121,7 @@ class MyClass {
    int add_one() { return ++*ptr; }
 };

-void main()
+int main()
 {
    boost::scoped_ptr&lt;Shoe&gt; x(new Shoe);
    MyClass my_instance;
@@ -150,12 +156,12 @@ Buckle my shoe</pre>
 		<p>One common usage of <b>scoped_ptr</b> is to implement a handle/body (also called 
 			pimpl) idiom which avoids exposing the body (implementation) in the header 
 			file.</p>
-		<p>The <a href="scoped_ptr_example_test.cpp">scoped_ptr_example_test.cpp</a> sample 
-			program includes a header file, <a href="scoped_ptr_example.hpp">scoped_ptr_example.hpp</a>, 
+		<p>The <a href="example/scoped_ptr_example_test.cpp">scoped_ptr_example_test.cpp</a>
+			sample program includes a header file, <a href="example/scoped_ptr_example.hpp">scoped_ptr_example.hpp</a>, 
 			which uses a <b>scoped_ptr&lt;&gt;</b> to an incomplete type to hide the 
 			implementation. The instantiation of member functions which require a complete 
-			type occurs in the <a href="scoped_ptr_example.cpp">scoped_ptr_example.cpp</a> implementation 
-			file.</p>
+			type occurs in the <a href="example/scoped_ptr_example.cpp">scoped_ptr_example.cpp</a>
+			implementation file.</p>
 		<h2>Frequently Asked Questions</h2>
 		<p><b>Q</b>. Why doesn't <b>scoped_ptr</b> have a release() member?<br>
 			<b>A</b>. When reading source code, it is valuable to be able to draw 
@@ -165,12 +171,11 @@ Buckle my shoe</pre>
 			given context. Use <STRONG>std::auto_ptr</STRONG> where transfer of ownership 
 			is required. (supplied by Dave Abrahams)</p>
 		<hr>
-		<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan -->
-			17 September 2002<!--webbot bot="Timestamp" endspan i-checksum="15110" --></p>
-		<p>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
-			Copyright 2002 Peter Dimov. Permission to copy, use, modify, sell and 
-			distribute this document is granted provided this copyright notice appears in 
-			all copies. This document is provided "as is" without express or implied 
-			warranty, and with no claim as to its suitability for any purpose.</p>
+		<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan --> 
+			09 January 2003<!--webbot bot="Timestamp" endspan i-checksum="32310" --></p>
+		<p><small>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
+			Copyright 2002-2005 Peter Dimov. Distributed under the Boost Software License, Version 
+			1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+			copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
 	</body>
 </html>
--- a/scoped_ptr_example_test.cpp
+++ b/scoped_ptr_example_test.cpp
@@ -1,10 +0,0 @@
-// Boost scoped_ptr_example_test main program  -------------------------------//
-
-#include "scoped_ptr_example.hpp"
-
-int main()
-{
-  example my_example;
-  my_example.do_something();
-  return 0;
-}
--- a/shared_array.htm
+++ b/shared_array.htm
@@ -5,8 +5,8 @@
 		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 	</head>
 	<body bgcolor="#ffffff" text="#000000">
-		<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" width="277" height="86">shared_array 
-			class template</h1>
+		<h1><A href="../../index.htm"><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86"
+					border="0"></A>shared_array class template</h1>
 		<p>The <b>shared_array</b> class template stores a pointer to a dynamically 
 			allocated array. (Dynamically allocated array are allocated with the C++ <b>new[]</b>
 			expression.) The object pointed to is guaranteed to be deleted when the last <b>shared_array</b>
@@ -26,18 +26,18 @@
 		<p>A <b>shared_ptr</b> to a <b>std::vector</b> is an alternative to a <b>shared_array</b>
 			that is a bit heavier duty but far more flexible.</p>
 		<p>The class template is parameterized on <b>T</b>, the type of the object pointed 
-			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#Common requirements">
+			to. <b>T</b> must meet the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
 		<h2>Synopsis</h2>
 		<pre>namespace boost {

-  template&lt;typename T&gt; class shared_array {
+  template&lt;class T&gt; class shared_array {

    public:
      typedef T <a href="#element_type">element_type</a>;

      explicit <a href="#constructors">shared_array</a>(T * p = 0);
-      template&lt;typename D&gt; <a href="#constructors">shared_array</a>(T * p, D d);
+      template&lt;class D&gt; <a href="#constructors">shared_array</a>(T * p, D d);
      <a href="#destructor">~shared_array</a>(); // never throws

      <a href="#constructors">shared_array</a>(shared_array const &amp; r); // never throws
@@ -45,25 +45,27 @@
      shared_array &amp; <a href="#assignment">operator=</a>(shared_array const &amp; r); // never throws

      void <a href="#reset">reset</a>(T * p = 0);
-      template&lt;typename D&gt; void <a href="#reset">reset</a>(T * p, D d);
+      template&lt;class D&gt; void <a href="#reset">reset</a>(T * p, D d);

-      T &amp; <a href="#indexing">operator[]</a>(std::ptrdiff_t i) const() const; // never throws
+      T &amp; <a href="#indexing">operator[]</a>(std::ptrdiff_t i) const; // never throws
      T * <a href="#get">get</a>() const; // never throws

      bool <a href="#unique">unique</a>() const; // never throws
      long <a href="#use_count">use_count</a>() const; // never throws

+      operator <A href="#conversions" ><i>unspecified-bool-type</i></A>() const; // never throws
+
      void <a href="#swap">swap</a>(shared_array&lt;T&gt; &amp; b); // never throws
  };

-  template&lt;typename T&gt;
+  template&lt;class T&gt;
    bool <a href="#comparison">operator==</a>(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws
-  template&lt;typename T&gt;
+  template&lt;class T&gt;
    bool <a href="#comparison">operator!=</a>(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws
-  template&lt;typename T&gt;
+  template&lt;class T&gt;
    bool <a href="#comparison">operator&lt;</a>(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws

-  template&lt;typename T&gt; void <a href="#free-swap">swap</a>(shared_array&lt;T&gt; &amp; a, shared_array&lt;T&gt; &amp; b); // never throws
+  template&lt;class T&gt; void <a href="#free-swap">swap</a>(shared_array&lt;T&gt; &amp; a, shared_array&lt;T&gt; &amp; b); // never throws

 }</pre>
 		<h2>Members</h2>
@@ -78,7 +80,7 @@
 				~shared_array</a>). The only exception which may be thrown by this 
 			constructor is <b>std::bad_alloc</b>. If an exception is thrown, <b>delete[] p</b>
 			is called.</p>
-		<pre>template&lt;typename D&gt; shared_array(T * p, D d);</pre>
+		<pre>template&lt;class D&gt; shared_array(T * p, D d);</pre>
 		<p>Constructs a <b>shared_array</b>, storing a copy of <b>p</b> and of <b>d</b>. 
 			Afterwards, the <a href="#use_count">use count</a> is 1. <b>D</b>'s copy 
 			constructor and destructor must not throw. When the the time comes to delete 
@@ -97,9 +99,9 @@
 			a pointer with a value of 0 is harmless. <b>T</b> need not be a complete type. 
 			The guarantee that this does not throw exceptions depends on the requirement 
 			that the deleted object's destructor does not throw exceptions. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</p>
-		<h3><a name="operator=">assignment</a></h3>
-		<pre>shared_array &amp; <a href="#assignment">operator=</a>(shared_array const &amp; r); // never throws</pre>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
+		<h3><a name="assignment">assignment</a></h3>
+		<pre>shared_array &amp; operator=(shared_array const &amp; r); // never throws</pre>
 		<p>Constructs a new <b>shared_array</b> as described <a href="#constructors">above</a>, 
 			then replaces this <b>shared_array</b> with the new one, destroying the 
 			replaced object.</p>
@@ -109,13 +111,13 @@
 			then replaces this <b>shared_array</b> with the new one, destroying the 
 			replaced object. The only exception which may be thrown is <b>std::bad_alloc</b>. 
 			If an exception is thrown, <b>delete[] p</b> is called.</p>
-		<pre>template&lt;typename D&gt; void reset(T * p, D d);</pre>
+		<pre>template&lt;class D&gt; void reset(T * p, D d);</pre>
 		<p>Constructs a new <b>shared_array</b> as described <a href="#constructors">above</a>, 
 			then replaces this <b>shared_array</b> with the new one, destroying the 
 			replaced object. <b>D</b>'s copy constructor must not throw. The only exception 
 			which may be thrown is <b>std::bad_alloc</b>. If an exception is thrown, <b>d(p)</b>
 			is called.</p>
-		<h3><a name="indirection">indexing</a></h3>
+		<h3><a name="indexing">indexing</a></h3>
 		<pre>T &amp; operator[](std::ptrdiff_t i) const; // never throws</pre>
 		<p>Returns a reference to element <b>i</b> of the array pointed to by the stored 
 			pointer. Behavior is undefined and almost certainly undesirable if the stored 
@@ -124,36 +126,40 @@
 		<h3><a name="get">get</a></h3>
 		<pre>T * get() const; // never throws</pre>
 		<p>Returns the stored pointer. <b>T</b> need not be a complete type. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</p>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
 		<h3><a name="unique">unique</a></h3>
 		<pre>bool unique() const; // never throws</pre>
 		<p>Returns true if no other <b>shared_array</b> is sharing ownership of the stored 
 			pointer, false otherwise. <b>T</b> need not be a complete type. See the smart 
-			pointer <a href="smart_ptr.htm#Common requirements">common requirements</a>.</p>
+			pointer <a href="smart_ptr.htm#common_requirements">common requirements</a>.</p>
 		<h3><a name="use_count">use_count</a></h3>
 		<pre>long use_count() const; // never throws</pre>
 		<p>Returns the number of <b>shared_array</b> objects sharing ownership of the 
-			stored pointer. <b>T</b> need not be a complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">
+			stored pointer. <b>T</b> need not be a complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">
 				common requirements</a>.</p>
 		<p>Because <b>use_count</b> is not necessarily efficient to implement for 
 			implementations of <b>shared_array</b> that do not use an explicit reference 
 			count, it might be removed from some future version. Thus it should be used for 
 			debugging purposes only, and not production code.</p>
+		<h3><a name="conversions">conversions</a></h3>
+		<pre>operator <i>unspecified-bool-type</i> () const; // never throws</pre>
+		<p>Returns an unspecified value that, when used in boolean contexts, is equivalent 
+			to <code>get() != 0</code>.</p>
 		<h3><a name="swap">swap</a></h3>
 		<pre>void swap(shared_ptr &amp; b); // never throws</pre>
 		<p>Exchanges the contents of the two smart pointers. <b>T</b> need not be a 
-			complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">common 
+			complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">common 
 				requirements</a>.</p>
 		<h2><a name="functions">Free Functions</a></h2>
 		<h3><a name="comparison">comparison</a></h3>
-		<pre>template&lt;typename T&gt;
+		<pre>template&lt;class T&gt;
  bool operator==(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws
-template&lt;typename T&gt;
+template&lt;class T&gt;
  bool operator!=(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws
-template&lt;typename T&gt;
+template&lt;class T&gt;
  bool operator&lt;(shared_array&lt;T&gt; const &amp; a, shared_array&lt;T&gt; const &amp; b); // never throws</pre>
 		<p>Compares the stored pointers of the two smart pointers. <b>T</b> need not be a 
-			complete type. See the smart pointer <a href="smart_ptr.htm#Common requirements">common 
+			complete type. See the smart pointer <a href="smart_ptr.htm#common_requirements">common 
 				requirements</a>.</p>
 		<p>The <b>operator&lt;</b> overload is provided to define an ordering so that <b>shared_array</b>
 			objects can be used in associative containers such as <b>std::map</b>. The 
@@ -163,17 +169,17 @@ template&lt;typename T&gt;
 			paragraph 2) but <b>std::less&lt;&gt;</b> on pointers is well-defined (20.3.3 
 			[lib.comparisons] paragraph 8).</p>
 		<h3><a name="free-swap">swap</a></h3>
-		<pre>template&lt;typename T&gt;
+		<pre>template&lt;class T&gt;
  void swap(shared_array&lt;T&gt; &amp; a, shared_array&lt;T&gt; &amp; b) // never throws</pre>
 		<p>Equivalent to <b>a.swap(b)</b>. Matches the interface of <b>std::swap</b>. 
 			Provided as an aid to generic programming.</p>
 		<hr>
-		<p>Revised <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B %Y" startspan -->
-			8 February 2002<!--webbot bot="Timestamp" i-checksum="38439" endspan --></p>
-		<p>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
-			Permission to copy, use, modify, sell and distribute this document is granted 
-			provided this copyright notice appears in all copies. This document is provided 
-			"as is" without express or implied warranty, and with no claim as to its 
-			suitability for any purpose.</p>
+		<p>Revised 
+			<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B %Y" startspan --> 
+			09 January 2003<!--webbot bot="Timestamp" endspan i-checksum="32310" --></p>
+		<p><small>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
+			Copyright 2002-2005 Peter Dimov. Distributed under the Boost Software License, Version 
+			1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+			copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
 	</body>
 </html>
--- a/shared_ptr.htm
+++ b/shared_ptr.htm
@@ -5,21 +5,22 @@
 		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 	</head>
 	<body text="#000000" bgColor="#ffffff">
-		<h1><IMG height="86" alt="c++boost.gif (8819 bytes)" src="../../c++boost.gif" width="277" align="middle">shared_ptr 
-			class template</h1>
+		<h1><A href="../../index.htm"><IMG height="86" alt="boost.png (6897 bytes)" src="../../boost.png" width="277" align="middle"
+					border="0"></A>shared_ptr class template</h1>
 		<p><A href="#Introduction">Introduction</A><br>
-			<a href="#BestPractices">Best Practices</a><br>
+			<A href="#BestPractices">Best Practices</A><br>
 			<A href="#Synopsis">Synopsis</A><br>
 			<A href="#Members">Members</A><br>
 			<A href="#functions">Free Functions</A><br>
 			<A href="#example">Example</A><br>
 			<A href="#Handle/Body">Handle/Body Idiom</A><br>
-			<a href="#ThreadSafety">Thread Safety</a><br>
+			<A href="#ThreadSafety">Thread Safety</A><br>
 			<A href="#FAQ">Frequently Asked Questions</A><br>
-			<A href="smarttests.htm">Smart Pointer Timings</A></p>
+			<A href="smarttests.htm">Smart Pointer Timings</A><br>
+			<A href="sp_techniques.html">Programming Techniques</A></p>
 		<h2><a name="Introduction">Introduction</a></h2>
 		<p>The <b>shared_ptr</b> class template stores a pointer to a dynamically allocated 
-			object, typically with a C++ <EM>new-expression</EM> . The object pointed to is 
+			object, typically with a C++ <EM>new-expression</EM>. The object pointed to is 
 			guaranteed to be deleted when the last <b>shared_ptr</b> pointing to it is 
 			destroyed or reset. See the <A href="#example">example</A>.</p>
 		<p>Every <b>shared_ptr</b> meets the <b>CopyConstructible</b> and <b>Assignable</b> 
@@ -46,22 +47,28 @@
 			to <STRONG>shared_ptr&lt;T const&gt;</STRONG>, to <STRONG>shared_ptr&lt;U&gt;</STRONG>
 			where <STRONG>U</STRONG> is an accessible base of <STRONG>T</STRONG>, and to <STRONG>
 				shared_ptr&lt;void&gt;</STRONG>.</P>
+		<P><STRONG>shared_ptr</STRONG> is now part of <STRONG>TR1</STRONG>, the first C++ 
+			Library Technical Report. The latest draft of <STRONG>TR1</STRONG> is available 
+			at the following location:</P>
+		<P><A href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1745.pdf">http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1745.pdf</A>
+			(1.36Mb PDF)</P>
+		<P>This implementation conforms to the TR1 specification, with the only exception 
+			that it resides in namespace <code>boost</code> instead of <code>std::tr1</code>.</P>
 		<h2><a name="BestPractices">Best Practices</a></h2>
-		<P>A simple guideline that nearly eliminates&nbsp;the possibility of memory leaks 
-			is: always use a named smart pointer variable to hold the result of <STRONG>new. </STRONG>
+		<P>A simple guideline that nearly eliminates the possibility of memory leaks is: 
+			always use a named smart pointer variable to hold the result of <STRONG>new. </STRONG>
 			Every occurence of the <STRONG>new</STRONG> keyword in the code should have the 
 			form:</P>
 		<PRE>shared_ptr&lt;T&gt; p(new Y);</PRE>
 		<P>It is, of course, acceptable to use another smart pointer in place of <STRONG>shared_ptr</STRONG>
 			above; having <STRONG>T</STRONG> and <STRONG>Y</STRONG> be the same type, or 
-			passing arguments to <STRONG>Y</STRONG>'s constructor&nbsp;is also OK.</P>
+			passing arguments to <STRONG>Y</STRONG>'s constructor is also OK.</P>
 		<P>If you observe this guideline, it naturally follows that you will have no 
 			explicit <STRONG>delete</STRONG>s; <STRONG>try/catch</STRONG> constructs will 
 			be rare.</P>
 		<P>Avoid using unnamed <STRONG>shared_ptr</STRONG> temporaries to save typing; to 
 			see why this is dangerous, consider this example:</P>
-		<PRE>
-void f(shared_ptr&lt;int&gt;, int);
+		<PRE>void f(shared_ptr&lt;int&gt;, int);
 int g();

 void ok()
@@ -81,38 +88,42 @@ void bad()
 			evaluated in unspecified order, it is possible for <STRONG>new int(2)</STRONG> to 
 			be evaluated first, <STRONG>g()</STRONG> second, and we may never get to the <STRONG>
 				shared_ptr </STRONG>constructor if <STRONG>g</STRONG> throws an exception. 
-			See <A href="http://www.gotw.ca/gotw/056.htm">Herb Sutter's treatment</A> of 
-			the issue for more information.</P>
+			See <A href="http://www.gotw.ca/gotw/056.htm">Herb Sutter's treatment</A> (also <A href="http://www.cuj.com/reference/articles/2002/0212/0212_sutter.htm">
+				here</A>) of the issue for more information.</P>
 		<h2><a name="Synopsis">Synopsis</a></h2>
 		<pre>namespace boost {

-  class use_count_is_zero: public std::exception;
+  class bad_weak_ptr: public std::exception;

-  template&lt;typename T&gt; class <A href="weak_ptr.htm" >weak_ptr</A>;
+  template&lt;class T&gt; class <A href="weak_ptr.htm" >weak_ptr</A>;

-  template&lt;typename T&gt; class shared_ptr {
+  template&lt;class T&gt; class shared_ptr {

    public:

      typedef T <A href="#element_type" >element_type</A>;

-      <A href="#constructors" >shared_ptr</A>();
-      template&lt;typename Y&gt; explicit <A href="#constructors" >shared_ptr</A>(Y * p);
-      template&lt;typename Y, typename D&gt; <A href="#constructors" >shared_ptr</A>(Y * p, D d);
+      <A href="#constructors" >shared_ptr</A>(); // never throws
+      template&lt;class Y&gt; explicit <A href="#constructors" >shared_ptr</A>(Y * p);
+      template&lt;class Y, class D&gt; <A href="#constructors" >shared_ptr</A>(Y * p, D d);
+      template&lt;class Y, class D, class A&gt; <A href="#allocator_constructor" >shared_ptr</A>(Y * p, D d, A a);
      <A href="#destructor" >~shared_ptr</A>(); // never throws

      <A href="#constructors" >shared_ptr</A>(shared_ptr const &amp; r); // never throws
-      template&lt;typename Y&gt; <A href="#constructors" >shared_ptr</A>(shared_ptr&lt;Y&gt; const &amp; r); // never throws
-      explicit <A href="#constructors" >shared_ptr</A>(<A href="weak_ptr.htm" >weak_ptr</A> const &amp; r);
-      template&lt;typename Y&gt; <A href="#constructors" >shared_ptr</A>(std::auto_ptr&lt;Y&gt; &amp; r);
+      template&lt;class Y&gt; <A href="#constructors" >shared_ptr</A>(shared_ptr&lt;Y&gt; const &amp; r); // never throws
+      template&lt;class Y&gt; <A href="#constructors" >shared_ptr</A>(shared_ptr&lt;Y&gt; const &amp; r, T * p); // never throws
+      template&lt;class Y&gt; explicit <A href="#constructors" >shared_ptr</A>(<A href="weak_ptr.htm" >weak_ptr</A>&lt;Y&gt; const &amp; r);
+      template&lt;class Y&gt; explicit <A href="#constructors" >shared_ptr</A>(std::auto_ptr&lt;Y&gt; &amp; r);

      shared_ptr &amp; <A href="#assignment" >operator=</A>(shared_ptr const &amp; r); // never throws  
-      template&lt;typename Y&gt; shared_ptr &amp; <A href="#assignment" >operator=</A>(shared_ptr&lt;Y&gt; const &amp; r); // never throws
-      template&lt;typename Y&gt; shared_ptr &amp; <A href="#assignment" >operator=</A>(std::auto_ptr&lt;Y&gt; &amp; r);
+      template&lt;class Y&gt; shared_ptr &amp; <A href="#assignment" >operator=</A>(shared_ptr&lt;Y&gt; const &amp; r); // never throws
+      template&lt;class Y&gt; shared_ptr &amp; <A href="#assignment" >operator=</A>(std::auto_ptr&lt;Y&gt; &amp; r);

-      void <A href="#reset" >reset</A> ();
-      template&lt;typename Y&gt; void <A href="#reset" >reset</A> (Y * p);
-      template&lt;typename Y&gt; template&lt;typename D&gt; void <A href="#reset" >reset</A>(Y * p, D d);
+      void <A href="#reset" >reset</A>(); // never throws
+      template&lt;class Y&gt; void <A href="#reset" >reset</A>(Y * p);
+      template&lt;class Y, class D&gt; void <A href="#reset" >reset</A>(Y * p, D d);
+      template&lt;class Y, class D, class A&gt; void <A href="#reset" >reset</A>(Y * p, D d, A a);
+      template&lt;class Y&gt; void <A href="#reset" >reset</A>(shared_ptr&lt;Y&gt; const &amp; r, T * p); // never throws

      T &amp; <A href="#indirection" >operator*</A>() const; // never throws
      T * <A href="#indirection" >operator-&gt;</A>() const; // never throws
@@ -121,41 +132,39 @@ void bad()
      bool <A href="#unique" >unique</A>() const; // never throws
      long <A href="#use_count" >use_count</A>() const; // never throws

-      operator <a href="#conversions"><i>unspecified-bool-type</i></a> () const; // never throws
+      operator <A href="#conversions" ><i>unspecified-bool-type</i></A>() const; // never throws

-      void <A href="#swap" >swap</A>(shared_ptr&lt;T&gt; &amp; b); // never throws
+      void <A href="#swap" >swap</A>(shared_ptr &amp; b); // never throws
  };

-  template&lt;typename T, typename U&gt;
+  template&lt;class T, class U&gt;
    bool <A href="#comparison" >operator==</A>(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws
-  template&lt;typename T, typename U&gt;
+
+  template&lt;class T, class U&gt;
    bool <A href="#comparison" >operator!=</A>(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws
-  template&lt;typename T&gt;
-    bool <A href="#comparison" >operator&lt;</A>(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;T&gt; const &amp; b); // never throws

-  template&lt;typename T&gt; void <A href="#free-swap" >swap</A>(shared_ptr&lt;T&gt; &amp; a, shared_ptr&lt;T&gt; &amp; b); // never throws
+  template&lt;class T, class U&gt;
+    bool <A href="#comparison" >operator&lt;</A>(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws

-  template&lt;typename T&gt; T * <A href="#get_pointer" >get_pointer</A>(shared_ptr&lt;T&gt; const &amp; p); // never throws
+  template&lt;class T&gt; void <A href="#free-swap" >swap</A>(shared_ptr&lt;T&gt; &amp; a, shared_ptr&lt;T&gt; &amp; b); // never throws

-  template&lt;typename T, typename U&gt;
-    shared_ptr&lt;T&gt; <A href="#shared_static_cast" >shared_static_cast</A>(shared_ptr&lt;U&gt; const &amp; r); // never throws
-  template&lt;typename T, typename U&gt;
-    shared_ptr&lt;T&gt; <A href="#shared_dynamic_cast" >shared_dynamic_cast</A>(shared_ptr&lt;U&gt; const &amp; r);
-  template&lt;typename T, typename U&gt;
-    shared_ptr&lt;T&gt; <A href="#shared_polymorphic_cast" >shared_polymorphic_cast</A>(shared_ptr&lt;U&gt; const &amp; r);
-  template&lt;typename T, typename U&gt;
-    shared_ptr&lt;T&gt; <A href="#shared_polymorphic_downcast" >shared_polymorphic_downcast</A>(shared_ptr&lt;U&gt; const &amp; r); // never throws
+  template&lt;class T&gt; T * <A href="#get_pointer" >get_pointer</A>(shared_ptr&lt;T&gt; const &amp; p); // never throws

+  template&lt;class T, class U&gt;
+    shared_ptr&lt;T&gt; <A href="#static_pointer_cast" >static_pointer_cast</A>(shared_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class T, class U&gt;
+    shared_ptr&lt;T&gt; <A href="#const_pointer_cast" >const_pointer_cast</A>(shared_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class T, class U&gt;
+    shared_ptr&lt;T&gt; <A href="#dynamic_pointer_cast" >dynamic_pointer_cast</A>(shared_ptr&lt;U&gt; const &amp; r); // never throws
+
+  template&lt;class E, class T, class Y&gt;
+    std::basic_ostream&lt;E, T&gt; &amp; <A href="#insertion-operator" >operator&lt;&lt;</A> (std::basic_ostream&lt;E, T&gt; &amp; os, shared_ptr&lt;Y&gt; const &amp; p);
+
+  template&lt;class D, class T&gt;
+    D * <A href="#get_deleter">get_deleter</A>(shared_ptr&lt;T&gt; const &amp; p);
 }</pre>
-		<P><EM>[It might be&nbsp;convenient to relax the requirements on <STRONG>shared_ptr</STRONG>'s 
-				signature, allowing an additional, defaulted, template parameter; the parameter 
-				can encode the threading model, for example. This would help in detecting 
-				possible ODR violations.</EM></P>
-		<P><EM> On the other hand, using <STRONG>shared_ptr</STRONG> as an argument to 
-				a&nbsp;template template parameter requires an exact signature match. </EM><EM>Metaprogramming 
-				experts tend to deemphasize template template parameters as they are too 
-				inflexible, but the alternative is typically an std::allocator::rebind-type 
-				"hack".]</EM></P>
 		<h2><a name="Members">Members</a></h2>
 		<h3><a name="element_type">element_type</a></h3>
 		<pre>typedef T element_type;</pre>
@@ -163,40 +172,25 @@ void bad()
 			<p>Provides the type of the template parameter T.</p>
 		</blockquote>
 		<h3><a name="constructors">constructors</a></h3>
-		<pre>shared_ptr();</pre>
+		<pre>shared_ptr(); // never throws</pre>
 		<blockquote>
-			<p><b>Effects:</b> Constructs a <b>shared_ptr</b>.</p>
-			<p><b>Postconditions:</b> <A href="#use_count">use count</A> is 1; the stored 
-				pointer is 0.</p>
-			<p><b>Throws:</b> <b>std::bad_alloc</b>.</p>
-			<p><b>Exception safety:</b> If an exception is thrown, the constructor has no 
-				effect.</p>
+			<p><b>Effects:</b> Constructs an <EM>empty</EM> <b>shared_ptr</b>.</p>
+			<p><b>Postconditions:</b> <code>use_count() == 0 &amp;&amp; get() == 0</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
 		</blockquote>
-		<P><EM>[The poscondition of use_count() == 1 is too strong. Having the nothrow 
-				guarantee is important, since <STRONG>reset()</STRONG> is specified in terms of 
-				the default constructor, but the current specification requires that a count be 
-				allocated. Therefore, this postcondition will be dropped in a future release. 
-				The use count of a default-constructed <STRONG>shared_ptr</STRONG>, including 
-				all copies created from it, will probably be left unspecified.</EM></P>
-		<P><EM>There are two possible nothrow implementations, one stores 0 as a pointer to the 
-				reference count, the other uses a single statically allocated count for all 
-				default-constructed <STRONG>shared_ptr</STRONG>s. The second option is 
-				difficult to achieve in the current header-only reference implementation due to 
-				thread safety issues and initialization order, but it should not be precluded 
-				by the specification.</EM></P>
-		<P><EM>A future release may enable <STRONG>shared_ptr</STRONG> construction from a 
-				literal zero, for consistency with built-in pointers. It is not clear yet 
-				whether this constructor should be left implicit, enabling <STRONG>0</STRONG> to 
-				be used as a shorthand for <STRONG>shared_ptr&lt;T&gt;().</STRONG>]</EM></P>
-		<pre>template&lt;typename Y&gt; explicit shared_ptr(Y * p);</pre>
+		<P><EM>[The nothrow guarantee is important, since <STRONG>reset()</STRONG> is specified 
+				in terms of the default constructor; this implies that the constructor must not 
+				allocate memory.]</EM></P>
+		<pre>template&lt;class Y&gt; explicit shared_ptr(Y * p);</pre>
 		<blockquote>
 			<p><b>Requirements:</b> <b>p</b> must be convertible to <b>T *</b>. <STRONG>Y</STRONG>
 				must be a complete type. The expression <code>delete p</code> must be 
 				well-formed, must not invoke undefined behavior, and must not throw exceptions.
 			</p>
-			<p><b>Effects:</b> Constructs a <b>shared_ptr</b>, storing a copy of <b>p</b>.</p>
-			<p><b>Postconditions:</b> <A href="#use_count">use count</A> is 1.</p>
-			<p><b>Throws:</b> <b>std::bad_alloc</b>.</p>
+			<p><b>Effects:</b> Constructs a <b>shared_ptr</b> that <EM>owns</EM> the pointer <b>p</b>.</p>
+			<p><b>Postconditions:</b> <code>use_count() == 1 &amp;&amp; get() == p</code>.</p>
+			<p><b>Throws:</b> <STRONG>std::bad_alloc</STRONG>, or an implementation-defined 
+				exception when a resource other than memory could not be obtained.</p>
 			<p><b>Exception safety:</b> If an exception is thrown, <code>delete p</code> is 
 				called.</p>
 			<P><STRONG>Notes:</STRONG> <B>p</B> must be a pointer to an object that was 
@@ -208,38 +202,28 @@ void bad()
 				pointer type passed. The destructor will call <STRONG>delete</STRONG> with the 
 				same pointer, complete with its original type, even when <STRONG>T</STRONG> does 
 				not have a virtual destructor, or is <STRONG>void</STRONG>.</EM></P>
-		<P><EM>In the current implementation, if <STRONG>p</STRONG> is convertible to <STRONG>counted_base 
-					*</STRONG>, <STRONG>shared_ptr</STRONG> will use the embedded reference 
-				count supplied by <STRONG>counted_base</STRONG>. This is an (experimental) 
-				attempt to provide a way for <STRONG>shared_ptr</STRONG> to be constructed from 
-				a raw pointer such as <STRONG>this</STRONG>. A free function <STRONG>shared_from_this(q)</STRONG>
-				performs the conversion when <STRONG>q</STRONG> is convertible to <STRONG>counted_base 
-					const *</STRONG>.</EM></P>
-		<P><EM>The optional intrusive counting employed by the current implementation allows <STRONG>
-					shared_ptr</STRONG> to interoperate with <STRONG>intrusive_ptr</STRONG>, an 
-				experimental generic intrusive-counted smart pointer.</EM></P>
-		<P><EM> Another possible implementation is to use a global pointer-to-count map instead 
-				of intrusive counting. <STRONG>shared_from_this</STRONG> would no longer be 
-				O(1), which is a concern for some users, although I do not expect any 
-				performance problems, since the operation is rare. Maintaining a global 
-				map&nbsp;is difficult; it needs to be initialized before any <STRONG>shared_ptr</STRONG>
-				instances are constructed, and the initialization needs to be&nbsp;thread safe. 
-				In addition, under the Windows dynamic library model, it is possible for 
-				several maps to exist.</EM></P>
-		<P><EM> It is not yet clear which implementation should be used, or whether the 
-				specification should allow both; nevertheless,&nbsp;the ability to make a <STRONG>shared_ptr</STRONG>
-				from <STRONG>this</STRONG> is considered essential&nbsp;by experienced smart 
-				pointer users.</EM><EM>]</EM></P>
-		<pre>template&lt;typename Y, typename D&gt; shared_ptr(Y * p, D d);</pre>
+		<P><EM>The optional intrusive counting support has been dropped as it exposes too much 
+				implementation details and doesn't interact well with <STRONG>weak_ptr</STRONG>. 
+				The current implementation uses a different mechanism, <A href="enable_shared_from_this.html">
+					enable_shared_from_this</A>, to solve the "<STRONG>shared_ptr</STRONG> from <STRONG>
+					this</STRONG>" problem.</EM><EM>]</EM></P>
+		<a name="allocator_constructor"></a>
+		<pre>template&lt;class Y, class D&gt; shared_ptr(Y * p, D d);
+template&lt;class Y, class D, class A&gt; shared_ptr(Y * p, D d, A a);</pre>
 		<blockquote>
 			<p><b>Requirements:</b> <B>p</B> must be convertible to <B>T *</B>. <STRONG>D</STRONG>
 				must be <STRONG>CopyConstructible</STRONG>. The copy constructor and destructor 
 				of <b>D</b> must not throw. The expression <code>d(p)</code> must be 
-				well-formed, must not invoke undefined behavior, and must not throw exceptions.
+				well-formed, must not invoke undefined behavior, and must not throw exceptions. <STRONG>
+					A</STRONG> must be an <EM>Allocator</EM>, as described in section 20.1.5 (<STRONG>Allocator 
+					requirements</STRONG>) of the C++ Standard.
 			</p>
-			<p><b>Effects:</b> Constructs a <b>shared_ptr</b>, storing a copy of <b>p</b> and <b>d</b>.</p>
-			<p><b>Postconditions:</b> <A href="#use_count">use count</A> is 1.</p>
-			<p><b>Throws:</b> <b>std::bad_alloc</b>.</p>
+			<p><b>Effects:</b> Constructs a <b>shared_ptr</b> that <EM>owns</EM> the pointer <STRONG>
+					p</STRONG> and the deleter <b>d</b>. The second constructor allocates 
+				memory using a copy of <STRONG>a</STRONG>.</p>
+			<p><b>Postconditions:</b> <code>use_count() == 1 &amp;&amp; get() == p</code>.</p>
+			<p><b>Throws:</b> <STRONG>std::bad_alloc</STRONG>, or an implementation-defined 
+				exception when a resource other than memory could not be obtained.</p>
 			<p><b>Exception safety:</b> If an exception is thrown, <code>d(p)</code> is called.</p>
 			<p><b>Notes:</b> When the the time comes to delete the object pointed to by <b>p</b>, 
 				the stored copy of <STRONG>d</STRONG> is invoked with the stored copy of <STRONG>p</STRONG>
@@ -250,103 +234,113 @@ void bad()
 				is not part of the type, changing the allocation strategy does not break source 
 				or binary compatibility, and does not require a client recompilation. For 
 				example, a "no-op" deallocator is useful when returning a <STRONG>shared_ptr</STRONG>
-				to a statically allocated object.</EM></P>
+				to a statically allocated object, and other variations allow a <STRONG>shared_ptr</STRONG>
+				to be used as a wrapper for another smart pointer, easing interoperability.</EM></P>
 		<P><EM>The support for custom deallocators does not impose significant overhead. Other <STRONG>
 					shared_ptr</STRONG> features still require a deallocator to be kept.</EM></P>
-		<P><EM>The requirement that the copy constructor of <b>D</b> does not throw is too 
-				strong. It will be removed when some core language issues are resolved 
-				(cv-qualified function types, partial ordering clarifications.)]</EM></P>
+		<P><EM>The requirement that the copy constructor of <b>D</b> does not throw comes from 
+				the pass by value. If the copy constructor throws, the pointer is leaked. 
+				Removing the requirement requires a pass by (const) reference.</EM></P>
+		<P><EM>The main problem with pass by reference lies in its interaction with rvalues. A 
+				const reference may still cause a copy, and will require a const operator(). A 
+				non-const reference won't bind to an rvalue at all. A good solution to this 
+				problem is the rvalue reference proposed in <A href="http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1377.htm">
+					N1377</A>/<A href="http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1385.htm">N1385</A>.]</EM></P>
 		<pre>shared_ptr(shared_ptr const &amp; r); // never throws
-template&lt;typename Y&gt; shared_ptr(shared_ptr&lt;Y&gt; const &amp; r); // never throws</pre>
+template&lt;class Y&gt; shared_ptr(shared_ptr&lt;Y&gt; const &amp; r); // never throws</pre>
 		<blockquote>
-			<p><b>Effects:</b> Constructs a <b>shared_ptr</b>, as if by storing a copy of the 
-				pointer stored in <STRONG>r</STRONG>.</p>
-			<p><b>Postconditions:</b> <A href="#use_count">use count</A> for all copies is 
-				increased by one.</p>
+			<p><b>Effects:</b> If <b>r</b> is <EM>empty</EM>, constructs an <EM>empty</EM> <b>shared_ptr</b>; 
+				otherwise, constructs a <b>shared_ptr</b> that <EM>shares ownership</EM> with <b>r</b>.</p>
+			<p><b>Postconditions:</b> <code>get() == r.get() &amp;&amp; use_count() == 
+					r.use_count()</code>.</p>
 			<p><b>Throws:</b> nothing.</p>
 		</blockquote>
-		<P><EM>[The postcondition will be relaxed when a default-constructed <STRONG>shared_ptr</STRONG>
-				is being copied.]</EM></P>
-		<pre>explicit shared_ptr(<A href="weak_ptr.htm" >weak_ptr</A> const &amp; r);</pre>
+		<pre>template&lt;class Y&gt; shared_ptr(shared_ptr&lt;Y&gt; const &amp; r, T * p); // never throws</pre>
 		<blockquote>
-			<p><b>Effects:</b> Constructs a <b>shared_ptr</b>, as if by storing a copy of the 
-				pointer stored in <STRONG>r</STRONG>.</p>
-			<p><b>Postconditions:</b> <A href="#use_count">use count</A> for all copies is 
-				increased by one.</p>
-			<p><b>Throws:</b> <b>use_count_is_zero</b> when <code>r.use_count() == 0</code>.</p>
+			<p><b>Effects:</b> constructs a <b>shared_ptr</b> that <EM>shares ownership</EM> with
+				<b>r</b> and stores <b>p</b>.</p>
+			<p><b>Postconditions:</b> <code>get() == p &amp;&amp; use_count() == r.use_count()</code>.</p>
+			<p><b>Throws:</b> nothing.</p>
+		</blockquote>
+		<pre>template&lt;class Y&gt; explicit shared_ptr(<A href="weak_ptr.htm" >weak_ptr</A>&lt;Y&gt; const &amp; r);</pre>
+		<blockquote>
+			<p><b>Effects:</b> Constructs a <b>shared_ptr</b> that <EM>shares ownership</EM> with
+				<b>r</b> and stores a copy of the pointer stored in <STRONG>r</STRONG>.</p>
+			<p><b>Postconditions:</b> <code>use_count() == r.use_count()</code>.</p>
+			<p><b>Throws:</b> <b>bad_weak_ptr</b> when <code>r.use_count() == 0</code>.</p>
 			<p><b>Exception safety:</b> If an exception is thrown, the constructor has no 
 				effect.</p>
 		</blockquote>
-		<P><EM>[This constructor is an optional part of the specification; it depends on the 
-				existence of <STRONG>weak_ptr</STRONG>. It is true that <STRONG>weak_ptr</STRONG>
-				support imposes overhead on every <STRONG>shared_ptr</STRONG> user, regardless 
-				of whether weak pointers are used.</EM></P>
-		<P><EM>On the other hand, cyclic references are a serious problem with all reference 
-				counted designs. Not providing a solution within the library is unacceptable; 
-				if users are forced to reinvent the weak pointer wheel, there is substantial 
-				probability that they will get it wrong, as designing a safe <STRONG>weak_ptr</STRONG>
-				interface is non-trivial.</EM></P>
-		<P><EM>My opinion is that the added functionality is worth the cost. <STRONG>weak_ptr</STRONG>
-				is provided in the reference implementation as a proof of concept.]</EM></P>
-		<pre>template&lt;typename Y&gt; shared_ptr(std::auto_ptr&lt;Y&gt; &amp; r);</pre>
+		<pre>template&lt;class Y&gt; shared_ptr(std::auto_ptr&lt;Y&gt; &amp; r);</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Constructs a <B>shared_ptr</B>, as if by storing a copy of <STRONG>r.release()</STRONG>.</P>
-			<P><B>Postconditions:</B> <A href="#use_count">use count</A> is 1.</P>
-			<P><B>Throws:</B> <B>std::bad_alloc</B>.</P>
+			<p><b>Postconditions:</b> <code>use_count() == 1</code>.</p>
+			<p><b>Throws:</b> <STRONG>std::bad_alloc</STRONG>, or an implementation-defined 
+				exception when a resource other than memory could not be obtained.</p>
 			<P><B>Exception safety:</B> If an exception is thrown, the constructor has no 
 				effect.</P>
 		</BLOCKQUOTE>
 		<P><EM>[This constructor takes a the source <STRONG>auto_ptr</STRONG> by reference and 
 				not by value, and cannot accept <STRONG>auto_ptr</STRONG> temporaries. This is 
-				by design, as the constructor offers the strong guarantee.]</EM></P>
+				by design, as the constructor offers the strong guarantee; an rvalue reference 
+				would solve this problem, too.]</EM></P>
 		<h3><a name="destructor">destructor</a></h3>
 		<pre>~shared_ptr(); // never throws</pre>
 		<BLOCKQUOTE>
-			<P><B>Effects:</B> If <STRONG>*this</STRONG> is the sole owner (<code>use_count() == 1</code>), 
-				destroys the object pointed to by the stored pointer.</P>
-			<P><B>Postconditions:</B> <A href="#use_count">use count</A> for all remaining 
-				copies is decreased by one.</P>
+			<P><B>Effects:</B></P>
+			<UL>
+				<LI>
+					If <STRONG>*this</STRONG> is <EM>empty</EM>, or <EM>shares ownership</EM> with 
+					another <STRONG>shared_ptr</STRONG> instance (<code>use_count() &gt; 1</code>), 
+				there are no side effects.
+				<LI>
+					Otherwise, if <STRONG>*this</STRONG> <EM>owns</EM> a pointer <STRONG>p</STRONG> 
+					and a deleter <STRONG>d</STRONG>, <code>d(p)</code>
+				is called.
+				<LI>
+					Otherwise, <STRONG>*this</STRONG> <EM>owns</EM> a pointer <STRONG>p</STRONG>, 
+					and <code>delete p</code> is called.</LI></UL>
 			<P><B>Throws:</B> nothing.</P>
 		</BLOCKQUOTE>
 		<H3><a name="assignment">assignment</a></H3>
 		<pre>shared_ptr &amp; operator=(shared_ptr const &amp; r); // never throws
-template&lt;typename Y&gt; shared_ptr &amp; operator=(shared_ptr&lt;Y&gt; const &amp; r); // never throws
-template&lt;typename Y&gt; shared_ptr &amp; operator=(std::auto_ptr&lt;Y&gt; &amp; r);</pre>
+template&lt;class Y&gt; shared_ptr &amp; operator=(shared_ptr&lt;Y&gt; const &amp; r); // never throws
+template&lt;class Y&gt; shared_ptr &amp; operator=(std::auto_ptr&lt;Y&gt; &amp; r);</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Equivalent to <code>shared_ptr(r).swap(*this)</code>.</P>
+			<P><B>Returns:</B> <code>*this</code>.</P>
 			<P><B>Notes:</B> The use count updates caused by the temporary object construction 
 				and destruction are not considered observable side effects, and the 
 				implementation is free to meet the effects (and the implied guarantees) via 
 				different means, without creating a temporary. In particular, in the example:</P>
-			<pre>
-shared_ptr&lt;int&gt; p(new int);
+			<pre>shared_ptr&lt;int&gt; p(new int);
 shared_ptr&lt;void&gt; q(p);
 p = p;
 q = p;
 </pre>
 			<p>both assignments may be no-ops.</p>
 		</BLOCKQUOTE>
-		<P><EM>[Some experts consider the note to be redundant, as it appears to essentially 
-				mirror the "as if" rile. However, experience suggests that when C++ code is 
-				used to describe effects, it is often misinterpreted as required 
-				implementation. In addition, it is not entirely clear whether the "as if" rule 
-				actually applies here, so it's better to be explicit about the possible 
-				optimizations.]</EM></P>
 		<h3><a name="reset">reset</a></h3>
-		<pre>void reset();</pre>
+		<pre>void reset(); // never throws</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Equivalent to <code>shared_ptr().swap(*this)</code>.</P>
 		</BLOCKQUOTE>
-		<P><EM>[<STRONG>reset()</STRONG> will offer the nothrow guarantee in a future 
-				implementation.]</EM></P>
-		<pre>template&lt;typename Y&gt; void reset(Y * p);</pre>
+		<pre>template&lt;class Y&gt; void reset(Y * p);</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Equivalent to <code>shared_ptr(p).swap(*this)</code>.</P>
 		</BLOCKQUOTE>
-		<pre>template&lt;typename Y, typename D&gt; void reset(Y * p, D d);</pre>
+		<pre>template&lt;class Y, class D&gt; void reset(Y * p, D d);</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Equivalent to <code>shared_ptr(p, d).swap(*this)</code>.</P>
 		</BLOCKQUOTE>
+		<pre>template&lt;class Y, class D, class A&gt; void reset(Y * p, D d, A a);</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>shared_ptr(p, d, a).swap(*this)</code>.</P>
+		</BLOCKQUOTE>
+		<pre>template&lt;class Y&gt; void reset(shared_ptr&lt;Y&gt; const &amp; r, T * p); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><B>Effects:</B> Equivalent to <code>shared_ptr(r, p).swap(*this)</code>.</P>
+		</BLOCKQUOTE>
 		<h3><a name="indirection">indirection</a></h3>
 		<pre>T &amp; operator*() const; // never throws</pre>
 		<blockquote>
@@ -375,13 +369,12 @@ q = p;
 				If you are using <code>unique()</code> to implement copy on write, do not rely 
 				on a specific value when the stored pointer is zero.</P>
 		</blockquote>
-		<P><EM>[In a future release, <STRONG>unique()</STRONG> will return an unspecified value 
-				for a default-constructed <STRONG>shared_ptr.</STRONG>]</EM></P>
 		<h3><a name="use_count">use_count</a></h3>
 		<pre>long use_count() const; // never throws</pre>
 		<blockquote>
-			<p><b>Returns:</b> the number of <b>shared_ptr</b> objects sharing ownership of the 
-				stored pointer.</p>
+			<p><b>Returns:</b> the number of <b>shared_ptr</b> objects, <STRONG>*this</STRONG> included, 
+				that <i>share ownership</i> with <b>*this</b>, or 0 when <STRONG>*this</STRONG>
+				is <EM>empty</EM>.</p>
 			<p><b>Throws:</b> nothing.</p>
 			<P><B>Notes:</B> <code>use_count()</code> is not necessarily efficient. Use only 
 				for debugging and testing purposes, not for production code.</P>
@@ -389,8 +382,8 @@ q = p;
 		<h3><a name="conversions">conversions</a></h3>
 		<pre>operator <i>unspecified-bool-type</i> () const; // never throws</pre>
 		<blockquote>
-			<p><b>Returns:</b> an&nbsp;unspecified value that, when used in boolean contexts, 
-				is equivalent to <code>get() != 0</code>.</p>
+			<p><b>Returns:</b> an unspecified value that, when used in boolean contexts, is 
+				equivalent to <code>get() != 0</code>.</p>
 			<p><b>Throws:</b> nothing.</p>
 			<P><B>Notes:</B> This conversion operator allows <b>shared_ptr</b> objects to be 
 				used in boolean contexts, like <code>if (p &amp;&amp; p-&gt;valid()) {}</code>. 
@@ -398,8 +391,8 @@ q = p;
 				many of the implicit conversion pitfalls.</P>
 		</blockquote>
 		<P><EM>[The conversion to bool is not merely syntactic sugar. It allows <STRONG>shared_ptr</STRONG>s 
-				to be declared in conditions when using <STRONG>shared_dynamic_cast </STRONG>or <STRONG>
-					make_shared</STRONG>.]</EM></P>
+				to be declared in conditions when using <A href="#dynamic_pointer_cast">dynamic_pointer_cast</A>
+				or <A href="weak_ptr.htm#lock">weak_ptr::lock</A>.]</EM></P>
 		<h3><a name="swap">swap</a></h3>
 		<pre>void swap(shared_ptr &amp; b); // never throws</pre>
 		<blockquote>
@@ -408,24 +401,30 @@ q = p;
 		</blockquote>
 		<h2><a name="functions">Free Functions</a></h2>
 		<h3><a name="comparison">comparison</a></h3>
-		<pre>template&lt;typename T, typename U&gt;
+		<pre>template&lt;class T, class U&gt;
  bool operator==(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws</pre>
 		<blockquote>
 			<p><b>Returns:</b> <code>a.get() == b.get()</code>.</p>
 			<p><b>Throws:</b> nothing.</p>
 		</blockquote>
-		<pre>template&lt;typename T, typename U&gt;
+		<pre>template&lt;class T, class U&gt;
  bool operator!=(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws</pre>
 		<blockquote>
 			<p><b>Returns:</b> <code>a.get() != b.get()</code>.</p>
 			<p><b>Throws:</b> nothing.</p>
 		</blockquote>
-		<pre>template&lt;typename T&gt;
-  bool operator&lt;(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;T&gt; const &amp; b); // never throws</pre>
+		<pre>template&lt;class T, class U&gt;
+  bool operator&lt;(shared_ptr&lt;T&gt; const &amp; a, shared_ptr&lt;U&gt; const &amp; b); // never throws</pre>
 		<blockquote>
-			<p><b>Returns:</b> an&nbsp;unspecified value such that <b>operator&lt;</b> is a 
-				strict weak ordering as described in section 25.3 <code>[lib.alg.sorting]</code>
-				of the C++ standard.</p>
+			<p><b>Returns:</b> an unspecified value such that</p>
+			<UL>
+				<LI>
+					<b>operator&lt;</b> is a strict weak ordering as described in section 25.3 <code>[lib.alg.sorting]</code>
+				of the C++ standard;
+				<LI>
+					under the equivalence relation defined by <STRONG>operator&lt;</STRONG>, <code>!(a 
+						&lt; b) &amp;&amp; !(b &lt; a)</code>, two <STRONG>shared_ptr</STRONG> instances 
+					are equivalent if and only if they <EM>share ownership</EM> or are both <EM>empty</EM>.</LI></UL>
 			<p><b>Throws:</b> nothing.</p>
 			<P><B>Notes:</B> Allows <STRONG>shared_ptr</STRONG> objects to be used as keys in 
 				associative containers.</P>
@@ -436,10 +435,10 @@ q = p;
 				standard algorithms use <STRONG>operator&lt;</STRONG> instead of <STRONG>std::less</STRONG>
 				for comparisons when a predicate is not supplied. Composite objects, like <STRONG>std::pair</STRONG>, 
 				also implement their <STRONG>operator&lt;</STRONG> in terms of their contained 
-				subobjects'&nbsp;<STRONG>operator&lt;</STRONG>.</EM></P>
+				subobjects' <STRONG>operator&lt;</STRONG>.</EM></P>
 		<P><EM>The rest of the comparison operators are omitted by design.]</EM></P>
 		<h3><a name="free-swap">swap</a></h3>
-		<pre>template&lt;typename T&gt;
+		<pre>template&lt;class T&gt;
  void swap(shared_ptr&lt;T&gt; &amp; a, shared_ptr&lt;T&gt; &amp; b); // never throws</pre>
 		<BLOCKQUOTE>
 			<P><B>Effects:</B> Equivalent to <code>a.swap(b)</code>.</P>
@@ -451,7 +450,7 @@ q = p;
 				as this is currently the only legal way to supply a <STRONG>swap</STRONG> function 
 				that has a chance to be used by the standard library.]</EM></P>
 		<h3><a name="get_pointer">get_pointer</a></h3>
-		<pre>template&lt;typename T&gt;
+		<pre>template&lt;class T&gt;
  T * get_pointer(shared_ptr&lt;T&gt; const &amp; p); // never throws</pre>
 		<BLOCKQUOTE>
 			<P><B>Returns:</B> <code>p.get()</code>.</P>
@@ -459,23 +458,39 @@ q = p;
 			<P><B>Notes:</B> Provided as an aid to generic programming. Used by <A href="../bind/mem_fn.html">
 					mem_fn</A>.</P>
 		</BLOCKQUOTE>
-		<h3><a name="shared_static_cast">shared_static_cast</a></h3>
-		<pre>template&lt;typename T, typename U&gt;
-  shared_ptr&lt;T&gt; shared_static_cast(shared_ptr&lt;U&gt; const &amp; r); // never throws</pre>
+		<h3><a name="static_pointer_cast">static_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  shared_ptr&lt;T&gt; static_pointer_cast(shared_ptr&lt;U&gt; const &amp; r); // never throws</pre>
 		<BLOCKQUOTE>
 			<P><STRONG>Requires:</STRONG> The expression <code>static_cast&lt;T*&gt;(r.get())</code>
 				must be well-formed.</P>
-			<P><B>Returns:</B> A <STRONG>shared_ptr&lt;T&gt;</STRONG> object that stores a copy 
-				of <code>static_cast&lt;T*&gt;(r.get())</code> and shares ownership with <b>r</b>.</P>
+			<P><B>Returns:</B> If <b>r</b> is <i>empty</i>, an <i>empty</i> <b>shared_ptr&lt;T&gt;</b>; 
+				otherwise, a <STRONG>shared_ptr&lt;T&gt;</STRONG> object that stores a copy of <code>
+					static_cast&lt;T*&gt;(r.get())</code> and <i>shares ownership</i> with <b>r</b>.</P>
 			<P><B>Throws:</B> nothing.</P>
 			<P><B>Notes:</B> the seemingly equivalent expression</P>
 			<p><code>shared_ptr&lt;T&gt;(static_cast&lt;T*&gt;(r.get()))</code></p>
 			<p>will eventually result in undefined behavior, attempting to delete the same 
 				object twice.</p>
 		</BLOCKQUOTE>
-		<h3><a name="shared_dynamic_cast">shared_dynamic_cast</a></h3>
-		<pre>template&lt;typename T, typename U&gt;
-  shared_ptr&lt;T&gt; shared_dynamic_cast(shared_ptr&lt;U&gt; const &amp; r);</pre>
+		<h3><a name="const_pointer_cast">const_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  shared_ptr&lt;T&gt; const_pointer_cast(shared_ptr&lt;U&gt; const &amp; r); // never throws</pre>
+		<BLOCKQUOTE>
+			<P><STRONG>Requires:</STRONG> The expression <code>const_cast&lt;T*&gt;(r.get())</code>
+				must be well-formed.</P>
+			<P><B>Returns:</B> If <b>r</b> is <i>empty</i>, an <i>empty</i> <b>shared_ptr&lt;T&gt;</b>; 
+				otherwise, a <STRONG>shared_ptr&lt;T&gt;</STRONG> object that stores a copy of <code>
+					const_cast&lt;T*&gt;(r.get())</code> and <i>shares ownership</i> with <b>r</b>.</P>
+			<P><B>Throws:</B> nothing.</P>
+			<P><B>Notes:</B> the seemingly equivalent expression</P>
+			<p><code>shared_ptr&lt;T&gt;(const_cast&lt;T*&gt;(r.get()))</code></p>
+			<p>will eventually result in undefined behavior, attempting to delete the same 
+				object twice.</p>
+		</BLOCKQUOTE>
+		<h3><a name="dynamic_pointer_cast">dynamic_pointer_cast</a></h3>
+		<pre>template&lt;class T, class U&gt;
+  shared_ptr&lt;T&gt; dynamic_pointer_cast(shared_ptr&lt;U&gt; const &amp; r);</pre>
 		<BLOCKQUOTE>
 			<P><STRONG>Requires:</STRONG> The expression <CODE>dynamic_cast&lt;T*&gt;(r.get())</CODE>
 				must be well-formed and its behavior defined.</P>
@@ -483,47 +498,36 @@ q = p;
 			<UL>
 				<LI>
 					When <CODE>dynamic_cast&lt;T*&gt;(r.get())</CODE> returns a nonzero value, a <STRONG>
-						shared_ptr&lt;T&gt;</STRONG> object that stores a copy of it and shares 
-					ownership with <STRONG>r</STRONG>;
+						shared_ptr&lt;T&gt;</STRONG> object that stores a copy of it and <i>shares 
+						ownership</i> with <STRONG>r</STRONG>;
 				<LI>
-					Otherwise, a default-constructed <STRONG>shared_ptr&lt;T&gt;</STRONG> object.</LI></UL>
-			<P><B>Throws:</B> <STRONG>std::bad_alloc</STRONG>.</P>
-			<P><B>Exception safety:</B> If an exception is thrown, the function has no effect.</P>
+					Otherwise, an <i>empty</i> <STRONG>shared_ptr&lt;T&gt;</STRONG> object.</LI></UL>
+			<P><B>Throws:</B> nothing.</P>
 			<P><B>Notes:</B> the seemingly equivalent expression</P>
 			<P><CODE>shared_ptr&lt;T&gt;(dynamic_cast&lt;T*&gt;(r.get()))</CODE></P>
 			<P>will eventually result in undefined behavior, attempting to delete the same 
 				object twice.</P>
 		</BLOCKQUOTE>
-		<h3><a name="shared_polymorphic_cast">shared_polymorphic_cast</a></h3>
-		<pre>template&lt;typename T, typename U&gt;
-  shared_ptr&lt;T&gt; shared_polymorphic_cast(shared_ptr&lt;U&gt; const &amp; r);</pre>
+		<h3><a name="insertion-operator">operator&lt;&lt;</a></h3>
+		<pre>template&lt;class E, class T, class Y&gt;
+    std::basic_ostream&lt;E, T&gt; &amp; operator&lt;&lt; (std::basic_ostream&lt;E, T&gt; &amp; os, shared_ptr&lt;Y&gt; const &amp; p);</pre>
 		<BLOCKQUOTE>
-			<p><STRONG>Requires:</STRONG> The expression <CODE><A href="../conversion/cast.htm#Polymorphic_cast">
-						polymorphic_cast</A>&lt;T*&gt;(r.get())</CODE> must be well-formed and 
-				its behavior defined.</p>
-			<P><B>Returns:</B> A <STRONG>shared_ptr&lt;T&gt;</STRONG> object that stores a copy 
-				of <CODE><A href="../conversion/cast.htm#Polymorphic_cast">polymorphic_cast</A>&lt;T*&gt;(r.get())</CODE>
-				and shares ownership with <B>r</B>.</P>
-			<P><B>Throws:</B> <STRONG>std::bad_cast</STRONG> when the pointer cannot be 
-				converted.</P>
-			<P><B>Exception safety:</B> If an exception is thrown, the function has no effect.</P>
+			<p><STRONG>Effects:</STRONG> <code>os &lt;&lt; p.get();</code>.</p>
+			<P><B>Returns:</B> <b>os</b>.</P>
 		</BLOCKQUOTE>
-		<h3><a name="shared_polymorphic_downcast">shared_polymorphic_downcast</a></h3>
-		<pre>template&lt;typename T, typename U&gt;
-  shared_ptr&lt;T&gt; shared_polymorphic_downcast(shared_ptr&lt;U&gt; const &amp; r); // never throws</pre>
+		<h3><a name="get_deleter">get_deleter</a></h3>
+		<pre>template&lt;class D, class T&gt;
+    D * get_deleter(shared_ptr&lt;T&gt; const &amp; p);</pre>
 		<BLOCKQUOTE>
-			<p><STRONG>Requires:</STRONG> The expression <CODE><A href="../conversion/cast.htm#Polymorphic_cast">
-						polymorphic_downcast</A>&lt;T*&gt;(r.get())</CODE> must be well-formed 
-				and its behavior defined.</p>
-			<P><B>Returns:</B> A <STRONG>shared_ptr&lt;T&gt;</STRONG> object that stores a copy 
-				of <CODE><A href="../conversion/cast.htm#Polymorphic_cast">polymorphic_downcast</A>&lt;T*&gt;(r.get())</CODE>
-				and shares ownership with <B>r</B>.</P>
+			<P><B>Returns:</B> If <STRONG>*this</STRONG> <EM>owns</EM> a deleter <STRONG>d</STRONG>
+				of type (cv-unqualified) <STRONG>D</STRONG>, returns <code>&amp;d</code>; 
+				otherwise returns 0.</P>
 			<P><B>Throws:</B> nothing.</P>
 		</BLOCKQUOTE>
 		<h2><a name="example">Example</a></h2>
-		<p>See <A href="shared_ptr_example.cpp">shared_ptr_example.cpp</A> for a complete 
-			example program. The program builds a <b>std::vector</b> and <b>std::set</b> of <b>shared_ptr</b>
-			objects.</p>
+		<p>See <A href="example/shared_ptr_example.cpp">shared_ptr_example.cpp</A> for a 
+			complete example program. The program builds a <b>std::vector</b> and <b>std::set</b>
+			of <b>shared_ptr</b> objects.</p>
 		<p>Note that after the containers have been populated, some of the <b>shared_ptr</b>
 			objects will have a use count of 1 rather than a use count of 2, since the set 
 			is a <b>std::set</b> rather than a <b>std::multiset</b>, and thus does not 
@@ -536,26 +540,25 @@ q = p;
 		<p>One common usage of <b>shared_ptr</b> is to implement a handle/body (also called 
 			pimpl) idiom which avoids exposing the body (implementation) in the header 
 			file.</p>
-		<p>The <A href="shared_ptr_example2_test.cpp">shared_ptr_example2_test.cpp</A> sample 
-			program includes a header file, <A href="shared_ptr_example2.hpp">shared_ptr_example2.hpp</A>, 
+		<p>The <A href="example/shared_ptr_example2_test.cpp">shared_ptr_example2_test.cpp</A>
+			sample program includes a header file, <A href="example/shared_ptr_example2.hpp">shared_ptr_example2.hpp</A>, 
 			which uses a <b>shared_ptr&lt;&gt;</b> to an incomplete type to hide the 
 			implementation. The instantiation of member functions which require a complete 
-			type occurs in the <A href="shared_ptr_example2.cpp">shared_ptr_example2.cpp</A>
+			type occurs in the <A href="example/shared_ptr_example2.cpp">shared_ptr_example2.cpp</A>
 			implementation file. Note that there is no need for an explicit destructor. 
 			Unlike ~scoped_ptr, ~shared_ptr does not require that <b>T</b> be a complete 
 			type.</p>
 		<h2><a name="ThreadSafety">Thread Safety</a></h2>
 		<p><STRONG>shared_ptr</STRONG> objects offer the same level of thread safety as 
-			built-in types.&nbsp;A&nbsp;<STRONG>shared_ptr</STRONG> instance can be "read" 
-			(accessed using only const operations)&nbsp;simultaneously by multiple threads. 
-			Different <STRONG>shared_ptr</STRONG> instances can be "written to" (accessed 
-			using mutable operations such as <STRONG>operator= </STRONG>or <STRONG>reset</STRONG>) 
-			simultaneosly by multiple threads (even when these instances are copies, and 
-			share the same reference count underneath.)</p>
+			built-in types. A <STRONG>shared_ptr</STRONG> instance can be "read" (accessed 
+			using only const operations) simultaneously by multiple threads. Different <STRONG>shared_ptr</STRONG>
+			instances can be "written to" (accessed using mutable operations such as <STRONG>operator=
+			</STRONG>or <STRONG>reset</STRONG>) simultaneosly by multiple threads (even 
+			when these instances are copies, and share the same reference count 
+			underneath.)</p>
 		<P>Any other simultaneous accesses result in undefined behavior.</P>
 		<P>Examples:</P>
-		<pre>
-shared_ptr&lt;int&gt; p(new int(42));
+		<pre>shared_ptr&lt;int&gt; p(new int(42));

 //--- Example 1 ---

@@ -568,7 +571,6 @@ shared_ptr&lt;int&gt; p3(p); // OK, multiple reads are safe
 //--- Example 2 ---

 // thread A
-
 p.reset(new int(1912)); // writes p

 // thread B
@@ -598,54 +600,90 @@ p3.reset(new int(1));
 // thread B
 p3.reset(new int(2)); // undefined, multiple writes
 </pre>
-		<p><STRONG>shared_ptr</STRONG> uses <A href="../config/config.htm">Boost.Config</A> 
-			to detect whether the implementation supports threads. If your program is 
-			single-threaded, but your platform is autodetected by <STRONG>Boost.Config</STRONG>
-			as supporting multiple threads, <STRONG>#define BOOST_DISABLE_THREADS</STRONG> to 
-			eliminate the thread safety overhead.</p>
+		<p>&nbsp;</p>
+		<P>Starting with Boost release 1.33.0, <STRONG>shared_ptr</STRONG> uses a lock-free 
+			implementation on the following platforms:</P>
+		<UL>
+			<LI>
+			GNU GCC on x86 or x86-64;
+			<LI>
+			GNU GCC on IA64;
+			<LI>
+			Metrowerks CodeWarrior on PowerPC;
+			<LI>
+			GNU GCC on PowerPC;
+			<LI>
+				Windows.</LI></UL>
+		<P>If your program is single-threaded and does not link to any libraries that might 
+			have used <STRONG>shared_ptr</STRONG> in its default configuration, you can <STRONG>
+				#define</STRONG> the macro <STRONG>BOOST_SP_DISABLE_THREADS</STRONG> on a 
+			project-wide basis to switch to ordinary non-atomic reference count updates.</P>
+		<P>(Defining <STRONG>BOOST_SP_DISABLE_THREADS</STRONG> in some, but not all, 
+			translation units is technically a violation of the One Definition Rule and 
+			undefined behavior. Nevertheless, the implementation attempts to do its best to 
+			accommodate the request to use non-atomic updates in those translation units. 
+			No guarantees, though.)</P>
+		<P>You can define the macro <STRONG>BOOST_SP_USE_PTHREADS</STRONG> to turn off the 
+			lock-free platform-specific implementation and fall back to the generic <STRONG>pthread_mutex_t</STRONG>-based 
+			code.</P>
 		<h2><a name="FAQ">Frequently Asked Questions</a></h2>
 		<P><B>Q.</B> There are several variations of shared pointers, with different 
 			tradeoffs; why does the smart pointer library supply only a single 
 			implementation? It would be useful to be able to experiment with each type so 
-			as to find the most suitable for the job at hand?<BR>
+			as to find the most suitable for the job at hand?</P>
+		<P>
 			<b>A.</b> An important goal of <STRONG>shared_ptr</STRONG> is to provide a 
 			standard shared-ownership pointer. Having a single pointer type is important 
 			for stable library interfaces, since different shared pointers typically cannot 
 			interoperate, i.e. a reference counted pointer (used by library A) cannot share 
-			ownership with a linked pointer (used by library B.)</P>
+			ownership with a linked pointer (used by library B.)<BR>
+		</P>
 		<P><B>Q.</B> Why doesn't <B>shared_ptr</B> have template parameters supplying 
-			traits or policies to allow extensive user customization?<BR>
+			traits or policies to allow extensive user customization?</P>
+		<P>
 			<B>A.</B> Parameterization discourages users. The <B>shared_ptr</B> template is 
 			carefully crafted to meet common needs without extensive parameterization. Some 
 			day a highly configurable smart pointer may be invented that is also very easy 
 			to use and very hard to misuse. Until then, <B>shared_ptr</B> is the smart 
 			pointer of choice for a wide range of applications. (Those interested in policy 
-			based smart pointers should read <A href="http://cseng.aw.com/book/0,,0201704315,00.html">
-				Modern C++ Design</A> by Andrei Alexandrescu.)</P>
+			based smart pointers should read <A href="http://www.awprofessional.com/bookstore/product.asp?isbn=0201704315&amp;rl=1">
+				Modern C++ Design</A> by Andrei Alexandrescu.)<BR>
+		</P>
 		<P><B>Q.</B> I am not convinced. Default parameters can be used where appropriate 
-			to hide the complexity. Again, why not policies?<BR>
+			to hide the complexity. Again, why not policies?</P>
+		<P>
 			<B>A.</B> Template parameters affect the type. See the answer to the first 
-			question above.</P>
-		<p><b>Q.</b> Why doesn't <b>shared_ptr</b> use a linked list implementation?<br>
+			question above.<BR>
+		</P>
+		<P><B>Q.</B> Why doesn't <b>shared_ptr</b> use a linked list implementation?</P>
+		<P>
 			<b>A.</b> A linked list implementation does not offer enough advantages to 
 			offset the added cost of an extra pointer. See <A href="smarttests.htm">timings</A>
 			page. In addition, it is expensive to make a linked list implementation thread 
-			safe.</p>
-		<p><b>Q.</b> Why doesn't <b>shared_ptr</b> (or any of the other Boost smart 
-			pointers) supply an automatic conversion to <b>T*</b>?<br>
-			<b>A.</b> Automatic conversion is believed to be too error prone.</p>
-		<p><b>Q.</b> Why does <b>shared_ptr</b> supply use_count()?<br>
+			safe.<BR>
+		</P>
+		<P><b>Q.</b> Why doesn't <b>shared_ptr</b> (or any of the other Boost smart 
+			pointers) supply an automatic conversion to <b>T*</b>?</P>
+		<P>
+			<b>A.</b> Automatic conversion is believed to be too error prone.<BR>
+		</P>
+		<P><B>Q.</B> Why does <b>shared_ptr</b> supply use_count()?</P>
+		<P>
 			<b>A.</b> As an aid to writing test cases and debugging displays. One of the 
 			progenitors had use_count(), and it was useful in tracking down bugs in a 
-			complex project that turned out to have cyclic-dependencies.</p>
-		<p><b>Q.</b> Why doesn't <b>shared_ptr</b> specify complexity requirements?<br>
+			complex project that turned out to have cyclic-dependencies.<BR>
+		</P>
+		<P><B>Q.</B> Why doesn't <b>shared_ptr</b> specify complexity requirements?</P>
+		<P>
 			<b>A.</b> Because complexity requirements limit implementors and complicate the 
 			specification without apparent benefit to <b>shared_ptr</b> users. For example, 
 			error-checking implementations might become non-conforming if they had to meet 
-			stringent complexity requirements.</p>
-		<p><b>Q.</b> Why doesn't <b>shared_ptr</b> provide a release() function?<br>
+			stringent complexity requirements.<BR>
+		</P>
+		<P><b>Q.</b> Why doesn't <b>shared_ptr</b> provide a release() function?</P>
+		<P>
 			<b>A.</b> <b>shared_ptr</b> cannot give away ownership unless it's unique() 
-			because the other copy will still destroy the object.</p>
+			because the other copy will still destroy the object.</P>
 		<p>Consider:</p>
 		<blockquote><pre>shared_ptr&lt;int&gt; a(new int);
 shared_ptr&lt;int&gt; b(a); // a.use_count() == b.use_count() == 2
@@ -654,17 +692,26 @@ int * p = a.release();

 // Who owns p now? b will still call delete on it in its destructor.</pre>
 		</blockquote>
-		<p><b>Q.</b> Why doesn't <b>shared_ptr</b> provide (your pet feature here)?<br>
-			<b>A.</b> Because (your pet feature here) would mandate a reference counted 
-			implementation or a linked list implementation, or some other specific 
-			implementation. This is not the intent.</p>
+		<p>Furthermore, the pointer returned by <code>release()</code> would be difficult 
+			to deallocate reliably, as the source <b>shared_ptr</b> could have been created 
+			with a custom deleter.<BR>
+		</p>
+		<P><b>Q.</b> Why is <code>operator-&gt;()</code> const, but its return value is a 
+			non-const pointer to the element type?</P>
+		<P>
+			<b>A.</b> Shallow copy pointers, including raw pointers, typically don't 
+			propagate constness. It makes little sense for them to do so, as you can always 
+			obtain a non-const pointer from a const one and then proceed to modify the 
+			object through it.<b>shared_ptr</b> is "as close to raw pointers as possible 
+			but no closer".<BR>
+			<BR>
+		</P>
 		<hr>
-		<p>Revised <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B %Y" startspan -->
-			23 July 2002<!--webbot bot="Timestamp" i-checksum="38439" endspan --></p>
-		<p>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
-			Copyright 2002 Peter Dimov. Permission to copy, use, modify, sell and 
-			distribute this document is granted provided this copyright notice appears in 
-			all copies. This document is provided "as is" without express or implied 
-			warranty, and with no claim as to its suitability for any purpose.</p>
+		<p>
+			$Date$</p>
+		<p><small>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
+				Copyright 2002-2005 Peter Dimov. Distributed under the Boost Software License, 
+				Version 1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A>
+				or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
 	</body>
 </html>
--- a/shared_ptr_mt_test.cpp
+++ b/shared_ptr_mt_test.cpp
@@ -1,178 +0,0 @@
-#if defined(_MSC_VER) && !defined(__ICL) && !defined(__COMO__)
-#pragma warning(disable: 4786)  // identifier truncated in debug info
-#pragma warning(disable: 4710)  // function not inlined
-#pragma warning(disable: 4711)  // function selected for automatic inline expansion
-#pragma warning(disable: 4514)  // unreferenced inline removed
-#endif
-
-//
-//  shared_ptr_mt_test.cpp - tests shared_ptr with multiple threads
-//
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//
-//  Permission to copy, use, modify, sell and distribute this software
-//  is granted provided this copyright notice appears in all copies.
-//  This software is provided "as is" without express or implied
-//  warranty, and with no claim as to its suitability for any purpose.
-//
-
-#include <boost/shared_ptr.hpp>
-#include <boost/bind.hpp>
-
-#include <vector>
-#include <memory>
-#include <stdexcept>
-
-#include <cstdio>
-#include <ctime>
-
-// 'portable' thread framework
-
-class abstract_thread
-{
-public:
-
-    virtual ~abstract_thread() {}
-    virtual void run() = 0;
-};
-
-#if !defined(BOOST_HAS_PTHREADS) && defined(BOOST_HAS_WINTHREADS)
-
-char const * title = "Using Windows threads";
-
-#include <windows.h>
-#include <process.h>
-
-typedef HANDLE pthread_t;
-
-unsigned __stdcall common_thread_routine(void * pv)
-{
-    abstract_thread * pt = static_cast<abstract_thread *>(pv);
-    pt->run();
-    delete pt;
-    return 0;
-}
-
-int pthread_create(pthread_t * thread, void const *, unsigned (__stdcall * start_routine) (void*), void* arg)
-{
-    HANDLE h = (HANDLE)_beginthreadex(0, 0, start_routine, arg, 0, 0);
-
-    if(h != 0)
-    {
-        *thread = h;
-        return 0;
-    }
-    else
-    {
-        return 1; // return errno;
-    }
-}
-
-int pthread_join(pthread_t thread, void ** /*value_ptr*/)
-{
-    ::WaitForSingleObject(thread, INFINITE);
-    ::CloseHandle(thread);
-    return 0;
-}
-
-#else
-
-char const * title = "Using POSIX threads";
-
-#include <pthread.h>
-
-extern "C" void * common_thread_routine(void * pv)
-{
-    abstract_thread * pt = static_cast<abstract_thread *>(pv);
-    pt->run();
-    delete pt;
-    return 0;
-}
-
-#endif
-
-//
-
-template<class F> class thread: public abstract_thread
-{
-public:
-
-    explicit thread(F f): f_(f)
-    {
-    }
-
-    void run()
-    {
-        f_();
-    }
-
-private:
-
-    F f_;
-};
-
-template<class F> pthread_t createThread(F f)
-{
-    std::auto_ptr<abstract_thread> p(new thread<F>(f));
-
-    pthread_t r;
-
-    if(pthread_create(&r, 0, common_thread_routine, p.get()) == 0)
-    {
-        p.release();
-        return r;
-    }
-
-    throw std::runtime_error("createThread failed.");
-}
-
-//
-
-int const n = 1024 * 1024;
-
-void test(boost::shared_ptr<int> const & pi)
-{
-    std::vector< boost::shared_ptr<int> > v;
-
-    for(int i = 0; i < n; ++i)
-    {
-        v.push_back(pi);
-    }
-}
-
-int const m = 16; // threads
-
-#if defined(BOOST_LWM_USE_CRITICAL_SECTION)
-    char const * implementation = "critical section";
-#elif defined(BOOST_LWM_USE_PTHREADS)
-    char const * implementation = "pthread_mutex";
-#else
-    char const * implementation = "spinlock";
-#endif
-
-int main()
-{
-    std::printf("%s: %s, %d threads, %d iterations: ", title, implementation, m, n);
-
-    boost::shared_ptr<int> pi(new int(42));
-
-    std::clock_t t = std::clock();
-
-    pthread_t a[m];
-
-    for(int i = 0; i < m; ++i)
-    {
-        a[i] = createThread( boost::bind(test, pi) );
-    }
-
-    for(int i = 0; i < m; ++i)
-    {
-        pthread_join(a[i], 0);
-    }
-
-    t = std::clock() - t;
-
-    std::printf("\n\n%.3f seconds.\n", static_cast<double>(t) / CLOCKS_PER_SEC);
-
-    return 0;
-}
--- a/smart_ptr.htm
+++ b/smart_ptr.htm
@@ -5,8 +5,15 @@
 		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
 	</head>
 	<body bgcolor="#ffffff" text="#000000">
-		<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" width="277" height="86">Smart 
-			Pointers</h1>
+		<h1><A href="../../index.htm"><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86"
+					border="0"></A>Smart Pointers</h1>
+		<p><a href="#Introduction">Introduction</a><br>
+			<a href="#common_requirements">Common Requirements</a><br>
+			<a href="#Exception_Safety">Exception Safety</a><br>
+			<a href="#Exception-specifications">Exception-specifications</a><br>
+			<a href="#History">History and Acknowledgements</a><br>
+			<a href="#References">References</a></p>
+		<h2><a name="Introduction">Introduction</a></h2>
 		<p>Smart pointers are objects which store pointers to dynamically allocated (heap) 
 			objects. They behave much like built-in C++ pointers except that they 
 			automatically delete the object pointed to at the appropriate time. Smart 
@@ -17,7 +24,7 @@
 			responsible for deletion of the object when it is no longer needed.</p>
 		<p>The smart pointer library provides five smart pointer class templates:</p>
 		<div align="left">
-			<table border="1" cellpadding="4" cellspacing="4">
+			<table border="1" cellpadding="4" cellspacing="0">
 				<tr>
 					<td><a href="scoped_ptr.htm"><b>scoped_ptr</b></a></td>
 					<td><a href="../../boost/scoped_ptr.hpp">&lt;boost/scoped_ptr.hpp&gt;</a></td>
@@ -43,20 +50,27 @@
 					<td><a href="../../boost/weak_ptr.hpp">&lt;boost/weak_ptr.hpp&gt;</a></td>
 					<td>Non-owning observers of an object owned by <b>shared_ptr</b>.</td>
 				</tr>
+				<tr>
+					<td><a href="intrusive_ptr.html"><b>intrusive_ptr</b></a></td>
+					<td><a href="../../boost/intrusive_ptr.hpp">&lt;boost/intrusive_ptr.hpp&gt;</a></td>
+					<td>Shared ownership of objects with an embedded reference count.</td>
+				</tr>
 			</table>
 		</div>
 		<p>These templates are designed to complement the <b>std::auto_ptr</b> template.</p>
 		<p>They are examples of the "resource acquisition is initialization" idiom 
 			described in Bjarne Stroustrup's "The C++ Programming Language", 3rd edition, 
 			Section 14.4, Resource Management.</p>
-		<p>A test program, <a href="smart_ptr_test.cpp">smart_ptr_test.cpp</a>, is provided 
-			to verify correct operation.</p>
+		<p>A test program, <a href="test/smart_ptr_test.cpp">smart_ptr_test.cpp</a>, is 
+			provided to verify correct operation.</p>
 		<p>A page on <a href="compatibility.htm">compatibility</a> with older versions of 
 			the Boost smart pointer library describes some of the changes since earlier 
 			versions of the smart pointer implementation.</p>
 		<p>A page on <a href="smarttests.htm">smart pointer timings</a> will be of interest 
 			to those curious about performance issues.</p>
-		<h2><a name="Common requirements">Common Requirements</a></h2>
+		<P>A page on <A href="sp_techniques.html">smart pointer programming techniques</A> lists 
+			some advanced applications of <code>shared_ptr</code> and <code>weak_ptr</code>.</P>
+		<h2><a name="common_requirements">Common Requirements</a></h2>
 		<p>These smart pointer class templates have a template parameter, <b>T</b>, which 
 			specifies the type of the object pointed to by the smart pointer. The behavior 
 			of the smart pointer templates is undefined if the destructor or <b>operator delete</b>
@@ -79,7 +93,7 @@
 			these idioms.</p>
 		<p>Note that <b>scoped_ptr</b> requires that <b>T</b> be a complete type at 
 			destruction time, but <b>shared_ptr</b> does not.</p>
-		<h2>Exception Safety</h2>
+		<h2><a name="Exception_Safety">Exception Safety</a></h2>
 		<p>Several functions in these smart pointer classes are specified as having "no 
 			effect" or "no effect except such-and-such" if an exception is thrown. This 
 			means that when an exception is thrown by an object of one of these classes, 
@@ -87,11 +101,11 @@
 			which resulted in the exception being thrown. This amounts to a guarantee that 
 			there are no detectable side effects. Other functions never throw exceptions. 
 			The only exception ever thrown by functions which do throw (assuming <b>T</b> meets 
-			the <a href="#Common requirements">common requirements</a>) is <b>std::bad_alloc</b>, 
+			the <a href="#common_requirements">common requirements</a>) is <b>std::bad_alloc</b>, 
 			and that is thrown only by functions which are explicitly documented as 
 			possibly throwing <b>std::bad_alloc</b>.</p>
-		<h2>Exception-specifications</h2>
-		<p>Exception-specifications are not used; see <a href="../../more/lib_guide.htm#Exception-specification">
+		<h2><a name="Exception-specifications">Exception-specifications</a></h2>
+		<p>Exception-specifications are not used; see <a href="http://www.boost.org/more/lib_guide.htm#Exception-specification">
 				exception-specification rationale</a>.</p>
 		<p>All the smart pointer templates contain member functions which can never throw 
 			exceptions, because they neither throw exceptions themselves nor call other 
@@ -99,8 +113,8 @@
 				// never throws</code>.
 		</p>
 		<p>Functions which destroy objects of the pointed to type are prohibited from 
-			throwing exceptions by the <a href="#Common requirements">common requirements</a>.</p>
-		<h2>History and Acknowledgements</h2>
+			throwing exceptions by the <a href="#common_requirements">common requirements</a>.</p>
+		<h2><a name="History">History</a> and Acknowledgements</h2>
 		<p>January 2002. Peter Dimov reworked all four classes, adding features, fixing 
 			bugs, and splitting them into four separate headers, and added <b>weak_ptr</b>. 
 			See the <a href="compatibility.htm">compatibility</a> page for a summary of the 
@@ -114,17 +128,10 @@
 		<p>September 1999. Luis Coelho provided <b>shared_ptr::swap</b> and <b>shared_array::swap</b></p>
 		<p>May 1999. In April and May, 1999, Valentin Bonnard and David Abrahams made a 
 			number of suggestions resulting in numerous improvements.</p>
-		<p>October 1998. In 1994 Greg Colvin proposed to the C++ Standards Committee 
-			classes named <b>auto_ptr</b> and <b>counted_ptr</b> which were very similar to 
-			what we now call <b>scoped_ptr</b> and <b>shared_ptr</b>. The committee 
-			document was 94-168/N0555, Exception Safe Smart Pointers. In one of the very 
-			few cases where the Library Working Group's recommendations were not followed 
-			by the full committee, <b>counted_ptr</b> was rejected and surprising 
-			transfer-of-ownership semantics were added to <b>auto_ptr</b>.</p>
-		<p>Beman Dawes proposed reviving the original semantics under the names <b>safe_ptr</b>
-			and <b>counted_ptr</b> at an October, 1998, meeting of Per Andersson, Matt 
+		<p>October 1998. Beman Dawes proposed reviving the original semantics under the 
+			names <b>safe_ptr</b> and <b>counted_ptr</b>, meeting of Per Andersson, Matt 
 			Austern, Greg Colvin, Sean Corfield, Pete Becker, Nico Josuttis, Dietmar K<>hl, 
-			Nathan Myers, Chichiang Wan and Judy Ward. During the discussion, the four 
+			Nathan Myers, Chichiang Wan and Judy Ward. During the discussion, the four new 
 			class names were finalized, it was decided that there was no need to exactly 
 			follow the <b>std::auto_ptr</b> interface, and various function signatures and 
 			semantics were finalized.</p>
@@ -154,15 +161,25 @@
 			experimented with.</p>
 		<p>But Greg Colvin and Jerry Schwarz argued that "parameterization will discourage 
 			users", and in the end we choose to supply only the direct implementation.</p>
+		<p>Summer, 1994. Greg Colvin proposed to the C++ Standards Committee classes named <b>auto_ptr</b>
+			and <b>counted_ptr</b> which were very similar to what we now call <b>scoped_ptr</b>
+			and <b>shared_ptr</b>. <a href="#Col-94">[Col-94]</a> In one of the very few 
+			cases where the Library Working Group's recommendations were not followed by 
+			the full committee, <b>counted_ptr</b> was rejected and surprising 
+			transfer-of-ownership semantics were added to <b>auto_ptr</b>.</p>
+		<h2><a name="References">References</a></h2>
+		<p>[<a name="Col-94">Col-94</a>] Gregory Colvin, <a href="http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/1994/N0555.pdf">
+				Exception Safe Smart Pointers</a>, C++ committee document 94-168/N0555, 
+			July, 1994.</p>
+		<p>[<a name="E&amp;D-94">E&amp;D-94</a>] John R. Ellis &amp; David L. Detlefs, <a href="http://www.usenix.org/publications/library/proceedings/c++94/full_papers/ellis.a">
+				Safe, Efficient Garbage Collection for C++</a>, Usenix Proceedings, 
+			February, 1994. This paper includes an extensive discussion of weak pointers 
+			and an extensive bibliography.</p>
 		<hr>
-		<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B %Y" startspan
--> 
-			4 February 2002<!--webbot bot="Timestamp" endspan i-checksum="40737"
--></p>
-		<p>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
-			Permission to copy, use, modify, sell and distribute this document is granted 
-			provided this copyright notice appears in all copies. This document is provided 
-			"as is" without express or implied warranty, and with no claim as to its 
-			suitability for any purpose.</p>
+		<p>$Date$</p>
+		<p><small>Copyright 1999 Greg Colvin and Beman Dawes. Copyright 2002 Darin Adler. 
+			Distributed under the Boost Software License, Version 1.0. See accompanying
+			file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or copy at
+			<A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
 	</body>
 </html>
--- a/smarttests.htm
+++ b/smarttests.htm
@@ -9,7 +9,7 @@

 <body bgcolor="#FFFFFF">

-<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="middle" WIDTH="277" HEIGHT="86">Smart Pointer Timings</h1>
+<h1><img src="../../boost.png" alt="boost.png (6897 bytes)" align="middle" WIDTH="277" HEIGHT="86">Smart Pointer Timings</h1>

 <p>In late January 2000, Mark Borgerding put forward a suggestion to boost for 
  a new design of smart pointer whereby an intrusive doubly linked list is used 
@@ -21,10 +21,10 @@
  mailing list and the tests which this page describes were performed to provide 
  a guide for current and future investigations into smart pointer implementation 
  strategies.</p>
-<p>Thanks are due to <a href="../../people/dave_abrahams.htm">Dave Abrahams</a>,
+<p>Thanks are due to <a href="http://www.boost.org/people/dave_abrahams.htm">Dave Abrahams</a>,
 Gavin Collings,
-<a href="../../people/greg_colvin.htm">Greg Colvin</a> and
-<a href="../../people/beman_dawes.html">Beman Dawes</a> 
+<a href="http://www.boost.org/people/greg_colvin.htm">Greg Colvin</a> and
+<a href="http://www.boost.org/people/beman_dawes.html">Beman Dawes</a> 
  for test code and trial implementations, the final version of which can be found 
  in .zip format <a href="smarttest.zip">here</a>.</p>
 <h2>Description</h2>
--- a/sp_techniques.html
+++ b/sp_techniques.html
@@ -0,0 +1,765 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+	<head>
+		<title>Smart Pointer Programming Techniques</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body text="#000000" bgColor="#ffffff">
+		<h1><A href="../../index.htm"><IMG height="86" alt="boost.png (6897 bytes)" src="../../boost.png" width="277" align="middle"
+					border="0"></A>Smart Pointer Programming Techniques</h1>
+		<p><A href="#incomplete">Using incomplete classes for implementation hiding</A><br>
+			<A href="#pimpl">The "Pimpl" idiom</A><br>
+			<A href="#abstract">Using abstract classes for implementation hiding</A><br>
+			<A href="#preventing_delete">Preventing <code>delete px.get()</code></A><br>
+			<A href="#array">Using a <code>shared_ptr</code> to hold a pointer to an array</A><br>
+			<A href="#encapsulation">Encapsulating allocation details, wrapping factory 
+				functions</A><br>
+			<A href="#static">Using a <code>shared_ptr</code> to hold a pointer to a statically 
+				allocated object</A><br>
+			<A href="#com">Using a <code>shared_ptr</code> to hold a pointer to a COM object</A><br>
+			<A href="#intrusive">Using a <code>shared_ptr</code> to hold a pointer to an object 
+				with an embedded reference count</A><br>
+			<A href="#another_sp">Using a <code>shared_ptr</code> to hold another shared 
+				ownership smart pointer</A><br>
+			<A href="#from_raw">Obtaining a <code>shared_ptr</code> from a raw pointer</A><br>
+			<A href="#in_constructor">Obtaining a <code>shared_ptr</code> (<code>weak_ptr</code>) 
+				to <code>this</code> in a constructor</A><br>
+			<A href="#from_this">Obtaining a <code>shared_ptr</code> to <code>this</code></A><br>
+			<A href="#handle">Using <code>shared_ptr</code> as a smart counted handle</A><br>
+			<A href="#on_block_exit">Using <code>shared_ptr</code> to execute code on block 
+				exit</A><br>
+			<A href="#pvoid">Using <code>shared_ptr&lt;void&gt;</code> to hold an arbitrary 
+				object</A><br>
+			<A href="#extra_data">Associating arbitrary data with heterogeneous <code>shared_ptr</code>
+				instances</A><br>
+			<A href="#as_lock">Using <code>shared_ptr</code> as a CopyConstructible mutex lock</A><br>
+			<A href="#wrapper">Using <code>shared_ptr</code> to wrap member function calls</A><br>
+			<A href="#delayed">Delayed deallocation</A><br>
+			<A href="#weak_without_shared">Weak pointers to objects not managed by a <code>shared_ptr</code></A><br>
+		</p>
+		<h2><A name="incomplete">Using incomplete classes for implementation hiding</A></h2>
+		<p>A proven technique (that works in C, too) for separating interface from 
+			implementation is to use a pointer to an incomplete class as an opaque handle:</p>
+		<pre>class FILE;
+
+FILE * fopen(char const * name, char const * mode);
+void fread(FILE * f, void * data, size_t size);
+void fclose(FILE * f);
+</pre>
+		<p>It is possible to express the above interface using <code>shared_ptr</code>, 
+			eliminating the need to manually call <code>fclose</code>:</p>
+		<pre>class FILE;
+
+shared_ptr&lt;FILE&gt; fopen(char const * name, char const * mode);
+void fread(shared_ptr&lt;FILE&gt; f, void * data, size_t size);
+</pre>
+		<p>This technique relies on <code>shared_ptr</code>'s ability to execute a custom 
+			deleter, eliminating the explicit call to <code>fclose</code>, and on the fact 
+			that <code>shared_ptr&lt;X&gt;</code> can be copied and destroyed when <code>X</code>
+			is incomplete.</p>
+		<h2><A name="pimpl">The "Pimpl" idiom</A></h2>
+		<p>A C++ specific variation of the incomplete class pattern is the "Pimpl" idiom. 
+			The incomplete class is not exposed to the user; it is hidden behind a 
+			forwarding facade. <code>shared_ptr</code> can be used to implement a "Pimpl":</p>
+		<pre>// file.hpp:
+
+class file
+{
+private:
+
+    class impl;
+    shared_ptr&lt;impl&gt; pimpl_;
+
+public:
+
+    file(char const * name, char const * mode);
+
+    // compiler generated members are fine and useful
+
+    void read(void * data, size_t size);
+};
+</pre>
+		<pre>// file.cpp:
+
+#include "file.hpp"
+
+class file::impl
+{
+private:
+
+    impl(impl const &amp;);
+    impl &amp; operator=(impl const &amp;);
+
+    // private data
+
+public:
+
+    impl(char const * name, char const * mode) { ... }
+    ~impl() { ... }
+    void read(void * data, size_t size) { ... }
+};
+
+file::file(char const * name, char const * mode): pimpl_(new impl(name, mode))
+{
+}
+
+void file::read(void * data, size_t size)
+{
+    pimpl_-&gt;read(data, size);
+}
+</pre>
+		<p>The key thing to note here is that the compiler-generated copy constructor, 
+			assignment operator, and destructor all have a sensible meaning. As a result, <code>
+				file</code> is <code>CopyConstructible</code> and <code>Assignable</code>, 
+			allowing its use in standard containers.</p>
+		<h2><A name="abstract">Using abstract classes for implementation hiding</A></h2>
+		<p>Another widely used C++ idiom for separating inteface and implementation is to 
+			use abstract base classes and factory functions. The abstract classes are 
+			sometimes called "interfaces" and the pattern is known as "interface-based 
+			programming". Again, <code>shared_ptr</code> can be used as the return type of 
+			the factory functions:</p>
+		<pre>// X.hpp:
+
+class X
+{
+public:
+
+    virtual void f() = 0;
+    virtual void g() = 0;
+
+protected:
+
+    ~X() {}
+};
+
+shared_ptr&lt;X&gt; createX();
+</pre>
+		<pre>-- X.cpp:
+
+class X_impl: public X
+{
+private:
+
+    X_impl(X_impl const &amp;);
+    X_impl &amp; operator=(X_impl const &amp;);
+
+public:
+
+    virtual void f()
+    {
+      // ...
+    }
+
+    virtual void g()
+    {
+      // ...
+    }
+};
+
+shared_ptr&lt;X&gt; createX()
+{
+    shared_ptr&lt;X&gt; px(new X_impl);
+    return px;
+}
+</pre>
+		<p>A key property of shared_ptr is that the allocation, construction, deallocation, 
+			and destruction details are captured at the point of construction, inside the 
+			factory function. Note the protected and nonvirtual destructor in the example 
+			above. The client code cannot, and does not need to, delete a pointer to <code>X</code>; 
+			the <code>shared_ptr&lt;X&gt;</code> instance returned from <code>createX</code>
+			will correctly call <code>~X_impl</code>.</p>
+		<h2><A name="preventing_delete">Preventing <code>delete px.get()</code></A></h2>
+		<p>It is often desirable to prevent client code from deleting a pointer that is 
+			being managed by <code>shared_ptr</code>. The previous technique showed one 
+			possible approach, using a protected destructor. Another alternative is to use 
+			a private deleter:</p>
+		<pre>class X
+{
+private:
+
+    ~X();
+
+    class deleter;
+    friend class deleter;
+
+    class deleter
+    {
+    public:
+
+        void operator()(X * p) { delete p; }
+    };
+
+public:
+
+    static shared_ptr&lt;X&gt; create()
+    {
+        shared_ptr&lt;X&gt; px(new X, X::deleter());
+        return px;
+    }
+};
+</pre>
+		<h2><A name="array">Using a <code>shared_ptr</code> to hold a pointer to an array</A></h2>
+		<p>A <code>shared_ptr</code> can be used to hold a pointer to an array allocated 
+			with <code>new[]</code>:</p>
+		<pre>shared_ptr&lt;X&gt; px(new X[1], <A href="../utility/checked_delete.html" >checked_array_deleter</A>&lt;X&gt;());
+</pre>
+		<p>Note, however, that <code><A href="shared_array.htm">shared_array</A></code> is 
+			often preferable, if this is an option. It has an array-specific interface, 
+			without <code>operator*</code> and <code>operator-&gt;</code>, and does not 
+			allow pointer conversions.</p>
+		<h2><A name="encapsulation">Encapsulating allocation details, wrapping factory 
+				functions</A></h2>
+		<p><code>shared_ptr</code> can be used in creating C++ wrappers over existing C 
+			style library interfaces that return raw pointers from their factory functions 
+			to encapsulate allocation details. As an example, consider this interface, 
+			where <code>CreateX</code> might allocate <code>X</code> from its own private 
+			heap, <code>~X</code> may be inaccessible, or <code>X</code> may be incomplete:</p>
+		<pre>X * CreateX();
+void DestroyX(X *);
+</pre>
+		<p>The only way to reliably destroy a pointer returned by <code>CreateX</code> is 
+			to call <code>DestroyX</code>.</p>
+		<P>Here is how a <code>shared_ptr</code>-based wrapper may look like:</P>
+		<pre>shared_ptr&lt;X&gt; createX()
+{
+    shared_ptr&lt;X&gt; px(CreateX(), DestroyX);
+    return px;
+}
+</pre>
+		<p>Client code that calls <code>createX</code> still does not need to know how the 
+			object has been allocated, but now the destruction is automatic.</p>
+		<h2><A name="static">Using a <code>shared_ptr</code> to hold a pointer to a statically 
+				allocated object</A></h2>
+		<p>Sometimes it is desirable to create a <code>shared_ptr</code> to an already 
+			existing object, so that the <code>shared_ptr</code> does not attempt to 
+			destroy the object when there are no more references left. As an example, the 
+			factory function:</p>
+		<pre>shared_ptr&lt;X&gt; createX();
+</pre>
+		<p>in certain situations may need to return a pointer to a statically allocated <code>X</code>
+			instance.</p>
+		<P>The solution is to use a custom deleter that does nothing:</P>
+		<pre>struct null_deleter
+{
+    void operator()(void const *) const
+    {
+    }
+};
+
+static X x;
+
+shared_ptr&lt;X&gt; createX()
+{
+    shared_ptr&lt;X&gt; px(&amp;x, null_deleter());
+    return px;
+}
+</pre>
+		<p>The same technique works for any object known to outlive the pointer.</p>
+		<h2><A name="com">Using a <code>shared_ptr</code> to hold a pointer to a COM Object</A></h2>
+		<p>Background: COM objects have an embedded reference count and two member 
+			functions that manipulate it. <code>AddRef()</code> increments the count. <code>Release()</code>
+			decrements the count and destroys itself when the count drops to zero.</p>
+		<P>It is possible to hold a pointer to a COM object in a <code>shared_ptr</code>:</P>
+		<pre>shared_ptr&lt;IWhatever&gt; make_shared_from_COM(IWhatever * p)
+{
+    p-&gt;AddRef();
+    shared_ptr&lt;IWhatever&gt; pw(p, <A href="../bind/mem_fn.html" >mem_fn</A>(&amp;IWhatever::Release));
+    return pw;
+}
+</pre>
+		<p>Note, however, that <code>shared_ptr</code> copies created from <code>pw</code> will 
+			not "register" in the embedded count of the COM object; they will share the 
+			single reference created in <code>make_shared_from_COM</code>. Weak pointers 
+			created from <code>pw</code> will be invalidated when the last <code>shared_ptr</code>
+			is destroyed, regardless of whether the COM object itself is still alive.</p>
+		<P>As <A href="../bind/mem_fn.html#Q3">explained</A> in the <code>mem_fn</code> documentation, 
+			you need to <A href="../bind/mem_fn.html#stdcall">#define 
+				BOOST_MEM_FN_ENABLE_STDCALL</A> first.</P>
+		<h2><A name="intrusive">Using a <code>shared_ptr</code> to hold a pointer to an object 
+				with an embedded reference count</A></h2>
+		<p>This is a generalization of the above technique. The example assumes that the 
+			object implements the two functions required by <code><A href="intrusive_ptr.html">intrusive_ptr</A></code>,
+			<code>intrusive_ptr_add_ref</code> and <code>intrusive_ptr_release</code>:</p>
+		<pre>template&lt;class T&gt; struct intrusive_deleter
+{
+    void operator()(T * p)
+    {
+        if(p) intrusive_ptr_release(p);
+    }
+};
+
+shared_ptr&lt;X&gt; make_shared_from_intrusive(X * p)
+{
+    if(p) intrusive_ptr_add_ref(p);
+    shared_ptr&lt;X&gt; px(p, intrusive_deleter&lt;X&gt;());
+    return px;
+}
+</pre>
+		<h2><A name="another_sp">Using a <code>shared_ptr</code> to hold another shared 
+				ownership smart pointer</A></h2>
+		<p>One of the design goals of <code>shared_ptr</code> is to be used in library 
+			interfaces. It is possible to encounter a situation where a library takes a <code>shared_ptr</code>
+			argument, but the object at hand is being managed by a different reference 
+			counted or linked smart pointer.</p>
+		<P>It is possible to exploit <code>shared_ptr</code>'s custom deleter feature to 
+			wrap this existing smart pointer behind a <code>shared_ptr</code> facade:</P>
+		<pre>template&lt;class P&gt; struct smart_pointer_deleter
+{
+private:
+
+    P p_;
+
+public:
+
+    smart_pointer_deleter(P const &amp; p): p_(p)
+    {
+    }
+
+    void operator()(void const *)
+    {
+        p_.reset();
+    }
+    
+    P const &amp; get() const
+    {
+        return p_;
+    }
+};
+
+shared_ptr&lt;X&gt; make_shared_from_another(another_ptr&lt;X&gt; qx)
+{
+    shared_ptr&lt;X&gt; px(qx.get(), smart_pointer_deleter&lt; another_ptr&lt;X&gt; &gt;(qx));
+    return px;
+}
+</pre>
+		<p>One subtle point is that deleters are not allowed to throw exceptions, and the 
+			above example as written assumes that <code>p_.reset()</code> doesn't throw. If 
+			this is not the case, <code>p_.reset()</code> should be wrapped in a <code>try {} 
+				catch(...) {}</code> block that ignores exceptions. In the (usually 
+			unlikely) event when an exception is thrown and ignored, <code>p_</code> will 
+			be released when the lifetime of the deleter ends. This happens when all 
+			references, including weak pointers, are destroyed or reset.</p>
+		<P>Another twist is that it is possible, given the above <code>shared_ptr</code> instance, 
+			to recover the original smart pointer, using <code><A href="shared_ptr.htm#get_deleter">
+					get_deleter</A></code>:</P>
+		<pre>void extract_another_from_shared(shared_ptr&lt;X&gt; px)
+{
+    typedef smart_pointer_deleter&lt; another_ptr&lt;X&gt; &gt; deleter;
+
+    if(deleter const * pd = get_deleter&lt;deleter&gt;(px))
+    {
+        another_ptr&lt;X&gt; qx = pd-&gt;get();
+    }
+    else
+    {
+        // not one of ours
+    }
+}
+</pre>
+		<h2><A name="from_raw">Obtaining a <code>shared_ptr</code> from a raw pointer</A></h2>
+		<p>Sometimes it is necessary to obtain a <code>shared_ptr</code> given a raw 
+			pointer to an object that is already managed by another <code>shared_ptr</code> 
+			instance. Example:</p>
+		<pre>void f(X * p)
+{
+    shared_ptr&lt;X&gt; px(<i>???</i>);
+}
+</pre>
+		<p>Inside <code>f</code>, we'd like to create a <code>shared_ptr</code> to <code>*p</code>.</p>
+		<P>In the general case, this problem has no solution. One approach is to modify <code>f</code>
+			to take a <code>shared_ptr</code>, if possible:</P>
+		<pre>void f(shared_ptr&lt;X&gt; px);
+</pre>
+		<p>The same transformation can be used for nonvirtual member functions, to convert 
+			the implicit <code>this</code>:</p>
+		<pre>void X::f(int m);
+</pre>
+		<p>would become a free function with a <code>shared_ptr</code> first argument:</p>
+		<pre>void f(shared_ptr&lt;X&gt; this_, int m);
+</pre>
+		<p>If <code>f</code> cannot be changed, but <code>X</code> uses intrusive counting, 
+			use <code><A href="#intrusive">make_shared_from_intrusive</A></code> described 
+			above. Or, if it's known that the <code>shared_ptr</code> created in <code>f</code>
+			will never outlive the object, use <A href="#static">a null deleter</A>.</p>
+		<h2><A name="in_constructor">Obtaining a <code>shared_ptr</code> (<code>weak_ptr</code>) 
+				to <code>this</code> in a constructor</A></h2>
+		<p>Some designs require objects to register themselves on construction with a 
+			central authority. When the registration routines take a shared_ptr, this leads 
+			to the question how could a constructor obtain a shared_ptr to this:</p>
+		<pre>class X
+{
+public:
+
+    X()
+    {
+        shared_ptr&lt;X&gt; this_(<i>???</i>);
+    }
+};
+</pre>
+		<p>In the general case, the problem cannot be solved. The <code>X</code> instance 
+			being constructed can be an automatic variable or a static variable; it can be 
+			created on the heap:</p>
+		<pre>shared_ptr&lt;X&gt; px(new X);</pre>
+		<P>but at construction time, <code>px</code> does not exist yet, and it is 
+			impossible to create another <code>shared_ptr</code> instance that shares 
+			ownership with it.</P>
+		<P>Depending on context, if the inner <code>shared_ptr</code> <code>this_</code> doesn't 
+			need to keep the object alive, use a <code>null_deleter</code> as explained <A href="#static">
+				here</A> and <A href="#weak_without_shared">here</A>. If <code>X</code> is 
+			supposed to always live on the heap, and be managed by a <code>shared_ptr</code>, 
+			use a static factory function:</P>
+		<pre>class X
+{
+private:
+
+    X() { ... }
+
+public:
+
+    static shared_ptr&lt;X&gt; create()
+    {
+        shared_ptr&lt;X&gt; px(new X);
+        // use px as 'this_'
+        return px;
+    }
+};
+</pre>
+		<h2><A name="from_this">Obtaining a <code>shared_ptr</code> to <code>this</code></A></h2>
+		<p>Sometimes it is needed to obtain a <code>shared_ptr</code> from <code>this</code>
+			in a virtual member function under the assumption that <code>this</code> is 
+			already managed by a <code>shared_ptr</code>. The transformations <A href="#from_raw">
+				described in the previous technique</A> cannot be applied.</p>
+		<P>A typical example:</P>
+		<pre>class X
+{
+public:
+
+    virtual void f() = 0;
+
+protected:
+
+    ~X() {}
+};
+
+class Y
+{
+public:
+
+    virtual shared_ptr&lt;X&gt; getX() = 0;
+
+protected:
+
+    ~Y() {}
+};
+
+// --
+
+class impl: public X, public Y
+{
+public:
+
+    impl() { ... }
+
+    virtual void f() { ... }
+
+    virtual shared_ptr&lt;X&gt; getX()
+    {
+        shared_ptr&lt;X&gt; px(<i>???</i>);
+        return px;
+    }
+};
+</pre>
+		<p>The solution is to keep a weak pointer to <code>this</code> as a member in <code>impl</code>:</p>
+		<pre>class impl: public X, public Y
+{
+private:
+
+    weak_ptr&lt;impl&gt; weak_this;
+
+    impl(impl const &amp;);
+    impl &amp; operator=(impl const &amp;);
+
+    impl() { ... }
+
+public:
+
+    static shared_ptr&lt;impl&gt; create()
+    {
+        shared_ptr&lt;impl&gt; pi(new impl);
+        pi-&gt;weak_this = pi;
+        return pi;
+    }
+
+    virtual void f() { ... }
+
+    virtual shared_ptr&lt;X&gt; getX()
+    {
+        shared_ptr&lt;X&gt; px(weak_this);
+        return px;
+    }
+};
+</pre>
+		<p>The library now includes a helper class template <code><A href="enable_shared_from_this.html">
+					enable_shared_from_this</A></code> that can be used to encapsulate the 
+			solution:</p>
+		<pre>class impl: public X, public Y, public enable_shared_from_this&lt;impl&gt;
+{
+public:
+
+    impl(impl const &amp;);
+    impl &amp; operator=(impl const &amp;);
+
+public:
+
+    virtual void f() { ... }
+
+    virtual shared_ptr&lt;X&gt; getX()
+    {
+        return shared_from_this();
+    }
+}
+</pre>
+		<p>Note that you no longer need to manually initialize the <code>weak_ptr</code> member 
+			in <code><A href="enable_shared_from_this.html">enable_shared_from_this</A></code>. 
+			Constructing a <code>shared_ptr</code> to <code>impl</code> takes care of that.</p>
+		<h2><A name="handle">Using <code>shared_ptr</code> as a smart counted handle</A></h2>
+		<p>Some library interfaces use opaque handles, a variation of the <A href="#incomplete">
+				incomplete class technique</A> described above. An example:</p>
+		<pre>typedef void * HANDLE;
+HANDLE CreateProcess();
+void CloseHandle(HANDLE);
+</pre>
+		<p>Instead of a raw pointer, it is possible to use <code>shared_ptr</code> as the 
+			handle and get reference counting and automatic resource management for free:</p>
+		<pre>typedef shared_ptr&lt;void&gt; handle;
+
+handle createProcess()
+{
+    shared_ptr&lt;void&gt; pv(CreateProcess(), CloseHandle);
+    return pv;
+}
+</pre>
+		<h2><A name="on_block_exit">Using <code>shared_ptr</code> to execute code on block exit</A></h2>
+		<p><code>shared_ptr&lt;void&gt;</code> can automatically execute cleanup code when 
+			control leaves a scope.</p>
+		<UL>
+			<LI>
+				Executing <code>f(p)</code>, where <code>p</code> is a pointer:</LI></UL>
+		<pre>    shared_ptr&lt;void&gt; guard(p, f);
+</pre>
+		<UL>
+			<LI>
+				Executing arbitrary code: <code>f(x, y)</code>:</LI></UL>
+		<pre>    shared_ptr&lt;void&gt; guard(static_cast&lt;void*&gt;(0), <A href="../bind/bind.html" >bind</A>(f, x, y));
+</pre>
+		<P>For a more thorough treatment, see the article "Simplify Your Exception-Safe 
+			Code" by Andrei Alexandrescu and Petru Marginean, available online at <A href="http://www.cuj.com/experts/1812/alexandr.htm?topic=experts">
+				http://www.cuj.com/experts/1812/alexandr.htm?topic=experts</A>.</P>
+		<h2><A name="pvoid">Using <code>shared_ptr&lt;void&gt;</code> to hold an arbitrary 
+				object</A></h2>
+		<p><code>shared_ptr&lt;void&gt;</code> can act as a generic object pointer similar 
+			to <code>void*</code>. When a <code>shared_ptr&lt;void&gt;</code> instance 
+			constructed as:</p>
+		<pre>    shared_ptr&lt;void&gt; pv(new X);
+</pre>
+		<p>is destroyed, it will correctly dispose of the <code>X</code> object by 
+			executing <code>~X</code>.</p>
+		<p>This propery can be used in much the same manner as a raw <code>void*</code> is 
+			used to temporarily strip type information from an object pointer. A <code>shared_ptr&lt;void&gt;</code>
+			can later be cast back to the correct type by using <code><A href="shared_ptr.htm#static_pointer_cast">
+					static_pointer_cast</A></code>.</p>
+		<h2><A name="extra_data">Associating arbitrary data with heterogeneous <code>shared_ptr</code>
+				instances</A></h2>
+		<p><code>shared_ptr</code> and <code>weak_ptr</code> support <code>operator&lt;</code>
+			comparisons required by standard associative containers such as <code>std::map</code>. 
+			This can be used to non-intrusively associate arbitrary data with objects 
+			managed by <code>shared_ptr</code>:</p>
+		<pre>typedef int Data;
+
+std::map&lt; shared_ptr&lt;void&gt;, Data &gt; userData;
+// or std::map&lt; weak_ptr&lt;void&gt;, Data &gt; userData; to not affect the lifetime
+
+shared_ptr&lt;X&gt; px(new X);
+shared_ptr&lt;int&gt; pi(new int(3));
+
+userData[px] = 42;
+userData[pi] = 91;
+</pre>
+		<h2><A name="as_lock">Using <code>shared_ptr</code> as a CopyConstructible mutex lock</A></h2>
+		<p>Sometimes it's necessary to return a mutex lock from a function, and a 
+			noncopyable lock cannot be returned by value. It is possible to use <code>shared_ptr</code>
+			as a mutex lock:</p>
+		<pre>class mutex
+{
+public:
+
+    void lock();
+    void unlock();
+};
+
+shared_ptr&lt;mutex&gt; lock(mutex &amp; m)
+{
+    m.lock();
+    return shared_ptr&lt;mutex&gt;(&amp;m, mem_fn(&amp;mutex::unlock));
+}
+</pre>
+		<p>Better yet, the <code>shared_ptr</code> instance acting as a lock can be 
+			encapsulated in a dedicated <code>shared_lock</code> class:</p>
+		<pre>class shared_lock
+{
+private:
+
+    shared_ptr&lt;void&gt; pv;
+
+public:
+
+    template&lt;class Mutex&gt; explicit shared_lock(Mutex &amp; m): pv((m.lock(), &amp;m), mem_fn(&amp;Mutex::unlock)) {}
+};
+</pre>
+		<p><code>shared_lock</code> can now be used as:</p>
+		<pre>    shared_lock lock(m);
+</pre>
+		<p>Note that <code>shared_lock</code> is not templated on the mutex type, thanks to <code>
+				shared_ptr&lt;void&gt;</code>'s ability to hide type information.</p>
+		<h2><A name="wrapper">Using <code>shared_ptr</code> to wrap member function calls</A></h2>
+		<p><code>shared_ptr</code> implements the ownership semantics required from the <code>Wrap</code>/<code>CallProxy</code>
+			scheme described in Bjarne Stroustrup's article "Wrapping C++ Member Function 
+			Calls" (available online at <A href="http://www.research.att.com/~bs/wrapper.pdf">http://www.research.att.com/~bs/wrapper.pdf</A>). 
+			An implementation is given below:</p>
+		<pre>template&lt;class T&gt; class pointer
+{
+private:
+
+    T * p_;
+
+public:
+
+    explicit pointer(T * p): p_(p)
+    {
+    }
+
+    shared_ptr&lt;T&gt; operator-&gt;() const
+    {
+        p_-&gt;prefix();
+        return shared_ptr&lt;T&gt;(p_, <A href="../bind/mem_fn.html" >mem_fn</A>(&amp;T::suffix));
+    }
+};
+
+class X
+{
+private:
+
+    void prefix();
+    void suffix();
+    friend class pointer&lt;X&gt;;
+    
+public:
+
+    void f();
+    void g();
+};
+
+int main()
+{
+    X x;
+
+    pointer&lt;X&gt; px(&amp;x);
+
+    px-&gt;f();
+    px-&gt;g();
+}
+</pre>
+		<h2><A name="delayed">Delayed deallocation</A></h2>
+		<p>In some situations, a single <code>px.reset()</code> can trigger an expensive 
+			deallocation in a performance-critical region:</p>
+		<pre>class X; // ~X is expensive
+
+class Y
+{
+    shared_ptr&lt;X&gt; px;
+
+public:
+
+    void f()
+    {
+        px.reset();
+    }
+};
+</pre>
+		<p>The solution is to postpone the potential deallocation by moving <code>px</code> 
+			to a dedicated free list that can be periodically emptied when performance and 
+			response times are not an issue:</p>
+		<pre>vector&lt; shared_ptr&lt;void&gt; &gt; free_list;
+
+class Y
+{
+    shared_ptr&lt;X&gt; px;
+
+public:
+
+    void f()
+    {
+        free_list.push_back(px);
+        px.reset();
+    }
+};
+
+// periodically invoke free_list.clear() when convenient
+</pre>
+		<p>Another variation is to move the free list logic to the construction point by 
+			using a delayed deleter:</p>
+		<pre>struct delayed_deleter
+{
+    template&lt;class T&gt; void operator()(T * p)
+    {
+        try
+        {
+            shared_ptr&lt;void&gt; pv(p);
+            free_list.push_back(pv);
+        }
+        catch(...)
+        {
+        }
+    }
+};
+</pre>
+		<h2><A name="weak_without_shared">Weak pointers to objects not managed by a <code>shared_ptr</code></A></h2>
+		<p>Make the object hold a <code>shared_ptr</code> to itself, using a <code>null_deleter</code>:</p>
+		<pre>class X
+{
+private:
+
+    shared_ptr&lt;X&gt; this_;
+    int i_;
+
+public:
+
+    explicit X(int i): this_(this, null_deleter()), i_(i)
+    {
+    }
+
+    // repeat in all constructors (including the copy constructor!)
+
+    X(X const &amp; rhs): this_(this, null_deleter()), i_(rhs.i_)
+    {
+    }
+
+    // do not forget to not assign this_ in the copy assignment
+
+    X &amp; operator=(X const &amp; rhs)
+    {
+	    i_ = rhs.i_;
+    }
+
+    weak_ptr&lt;X&gt; get_weak_ptr() const { return this_; }
+};
+</pre>
+		<p>When the object's lifetime ends, <code>X::this_</code> will be destroyed, and 
+			all weak pointers will automatically expire.</p>
+		<hr>
+		<p>$Date$</p>
+		<p><small>Copyright <20> 2003 Peter Dimov. Distributed under the Boost Software License, Version 
+				1.0. See accompanying file <A href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> or 
+				copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>.</small></p>
+	</body>
+</html>
--- a/src/sp_collector.cpp
+++ b/src/sp_collector.cpp
@@ -0,0 +1,270 @@
+//
+//  sp_collector.cpp
+//
+//  Copyright (c) 2002, 2003 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+#include <boost/assert.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/detail/lightweight_mutex.hpp>
+#include <cstdlib>
+#include <map>
+#include <deque>
+#include <iostream>
+
+typedef std::map< void const *, std::pair<void *, size_t> > map_type;
+
+static map_type & get_map()
+{
+    static map_type m;
+    return m;
+}
+
+typedef boost::detail::lightweight_mutex mutex_type;
+
+static mutex_type & get_mutex()
+{
+    static mutex_type m;
+    return m;
+}
+
+static void * init_mutex_before_main = &get_mutex();
+
+namespace
+{
+    class X;
+
+    struct count_layout
+    {
+        boost::detail::sp_counted_base * pi;
+        int id;
+    };
+
+    struct shared_ptr_layout
+    {
+        X * px;
+        count_layout pn;
+    };
+}
+
+// assume 4 byte alignment for pointers when scanning
+size_t const pointer_align = 4;
+
+typedef std::map<void const *, long> map2_type;
+
+static void scan_and_count(void const * area, size_t size, map_type const & m, map2_type & m2)
+{
+    unsigned char const * p = static_cast<unsigned char const *>(area);
+
+    for(size_t n = 0; n + sizeof(shared_ptr_layout) <= size; p += pointer_align, n += pointer_align)
+    {
+        shared_ptr_layout const * q = reinterpret_cast<shared_ptr_layout const *>(p);
+
+        if(q->pn.id == boost::detail::shared_count_id && q->pn.pi != 0 && m.count(q->pn.pi) != 0)
+        {
+            ++m2[q->pn.pi];
+        }
+    }
+}
+
+typedef std::deque<void const *> open_type;
+
+static void scan_and_mark(void const * area, size_t size, map2_type & m2, open_type & open)
+{
+    unsigned char const * p = static_cast<unsigned char const *>(area);
+
+    for(size_t n = 0; n + sizeof(shared_ptr_layout) <= size; p += pointer_align, n += pointer_align)
+    {
+        shared_ptr_layout const * q = reinterpret_cast<shared_ptr_layout const *>(p);
+
+        if(q->pn.id == boost::detail::shared_count_id && q->pn.pi != 0 && m2.count(q->pn.pi) != 0)
+        {
+            open.push_back(q->pn.pi);
+            m2.erase(q->pn.pi);
+        }
+    }
+}
+
+static void find_unreachable_objects_impl(map_type const & m, map2_type & m2)
+{
+    // scan objects for shared_ptr members, compute internal counts
+
+    {
+        std::cout << "... " << m.size() << " objects in m.\n";
+
+        for(map_type::const_iterator i = m.begin(); i != m.end(); ++i)
+        {
+            boost::detail::sp_counted_base const * p = static_cast<boost::detail::sp_counted_base const *>(i->first);
+
+            BOOST_ASSERT(p->use_count() != 0); // there should be no inactive counts in the map
+
+            m2[ i->first ];
+
+            scan_and_count(i->second.first, i->second.second, m, m2);
+        }
+
+        std::cout << "... " << m2.size() << " objects in m2.\n";
+    }
+
+    // mark reachable objects
+
+    {
+        open_type open;
+
+        for(map2_type::iterator i = m2.begin(); i != m2.end(); ++i)
+        {
+            boost::detail::sp_counted_base const * p = static_cast<boost::detail::sp_counted_base const *>(i->first);
+            if(p->use_count() != i->second) open.push_back(p);
+        }
+
+        std::cout << "... " << open.size() << " objects in open.\n";
+
+        for(open_type::iterator j = open.begin(); j != open.end(); ++j)
+        {
+            m2.erase(*j);
+        }
+
+        while(!open.empty())
+        {
+            void const * p = open.front();
+            open.pop_front();
+
+            map_type::const_iterator i = m.find(p);
+            BOOST_ASSERT(i != m.end());
+
+            scan_and_mark(i->second.first, i->second.second, m2, open);
+        }
+    }
+
+    // m2 now contains the unreachable objects
+}
+
+std::size_t find_unreachable_objects(bool report)
+{
+    map2_type m2;
+
+#ifdef BOOST_HAS_THREADS
+
+    // This will work without the #ifdef, but some compilers warn
+    // that lock is not referenced
+
+    mutex_type::scoped_lock lock(get_mutex());
+
+#endif
+
+    map_type const & m = get_map();
+
+    find_unreachable_objects_impl(m, m2);
+
+    if(report)
+    {
+        for(map2_type::iterator j = m2.begin(); j != m2.end(); ++j)
+        {
+            map_type::const_iterator i = m.find(j->first);
+            BOOST_ASSERT(i != m.end());
+            std::cout << "Unreachable object at " << i->second.first << ", " << i->second.second << " bytes long.\n";
+        }
+    }
+
+    return m2.size();
+}
+
+typedef std::deque< boost::shared_ptr<X> > free_list_type;
+
+static void scan_and_free(void * area, size_t size, map2_type const & m2, free_list_type & free)
+{
+    unsigned char * p = static_cast<unsigned char *>(area);
+
+    for(size_t n = 0; n + sizeof(shared_ptr_layout) <= size; p += pointer_align, n += pointer_align)
+    {
+        shared_ptr_layout * q = reinterpret_cast<shared_ptr_layout *>(p);
+
+        if(q->pn.id == boost::detail::shared_count_id && q->pn.pi != 0 && m2.count(q->pn.pi) != 0 && q->px != 0)
+        {
+            boost::shared_ptr<X> * ppx = reinterpret_cast< boost::shared_ptr<X> * >(p);
+            free.push_back(*ppx);
+            ppx->reset();
+        }
+    }
+}
+
+void free_unreachable_objects()
+{
+    free_list_type free;
+
+    {
+        map2_type m2;
+
+#ifdef BOOST_HAS_THREADS
+
+        mutex_type::scoped_lock lock(get_mutex());
+
+#endif
+
+        map_type const & m = get_map();
+
+        find_unreachable_objects_impl(m, m2);
+
+        for(map2_type::iterator j = m2.begin(); j != m2.end(); ++j)
+        {
+            map_type::const_iterator i = m.find(j->first);
+            BOOST_ASSERT(i != m.end());
+            scan_and_free(i->second.first, i->second.second, m2, free);
+        }
+    }
+
+    std::cout << "... about to free " << free.size() << " objects.\n";
+}
+
+// debug hooks
+
+namespace boost
+{
+
+void sp_scalar_constructor_hook(void *)
+{
+}
+
+void sp_scalar_constructor_hook(void * px, std::size_t size, void * pn)
+{
+#ifdef BOOST_HAS_THREADS
+
+    mutex_type::scoped_lock lock(get_mutex());
+
+#endif
+
+    get_map()[pn] = std::make_pair(px, size);
+}
+
+void sp_scalar_destructor_hook(void *)
+{
+}
+
+void sp_scalar_destructor_hook(void *, std::size_t, void * pn)
+{
+#ifdef BOOST_HAS_THREADS
+
+    mutex_type::scoped_lock lock(get_mutex());
+
+#endif
+
+    get_map().erase(pn);
+}
+
+void sp_array_constructor_hook(void *)
+{
+}
+
+void sp_array_destructor_hook(void *)
+{
+}
+
+} // namespace boost
+
+#endif // defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
--- a/src/sp_debug_hooks.cpp
+++ b/src/sp_debug_hooks.cpp
@@ -0,0 +1,243 @@
+//
+//  sp_debug_hooks.cpp
+//
+//  Copyright (c) 2002, 2003 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
+
+#include <boost/assert.hpp>
+#include <new>
+#include <cstdlib>
+
+int const m = 2; // m * sizeof(int) must be aligned appropriately
+
+// magic values to mark heap blocks with
+
+int const allocated_scalar  = 0x1234560C;
+int const allocated_array   = 0x1234560A;
+int const adopted_scalar    = 0x0567890C;
+int const adopted_array     = 0x0567890A;
+int const deleted           = 0x498769DE;
+
+using namespace std; // for compilers where things aren't in std
+
+// operator new
+
+static new_handler get_new_handler()
+{
+    new_handler p = set_new_handler(0);
+    set_new_handler(p);
+    return p;
+}
+
+static void * allocate(size_t n, int mark)
+{
+    int * pm;
+
+    for(;;)
+    {
+        pm = static_cast<int*>(malloc(n + m * sizeof(int)));
+
+        if(pm != 0) break;
+
+        if(new_handler pnh = get_new_handler())
+        {
+            pnh();
+        }
+        else
+        {
+            return 0;
+        }
+    }
+
+    *pm = mark;
+
+    return pm + m;
+}
+
+void * operator new(size_t n) throw(bad_alloc)
+{
+    void * p = allocate(n, allocated_scalar);
+
+#if !defined(BOOST_NO_EXCEPTIONS)
+
+    if(p == 0) throw bad_alloc();
+
+#endif
+
+    return p;
+}
+
+#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+
+void * operator new(size_t n, nothrow_t const &) throw()
+{
+    return allocate(n, allocated_scalar);
+}
+
+#endif
+
+void * operator new[](size_t n) throw(bad_alloc)
+{
+    void * p = allocate(n, allocated_array);
+
+#if !defined(BOOST_NO_EXCEPTIONS)
+
+    if(p == 0) throw bad_alloc();
+
+#endif
+
+    return p;
+}
+
+#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+
+void * operator new[](size_t n, nothrow_t const &) throw()
+{
+    return allocate(n, allocated_array);
+}
+
+#endif
+
+// debug hooks
+
+namespace boost
+{
+
+void sp_scalar_constructor_hook(void * p)
+{
+    if(p == 0) return;
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm != adopted_scalar);    // second smart pointer to the same address
+    BOOST_ASSERT(*pm != allocated_array);   // allocated with new[]
+    BOOST_ASSERT(*pm == allocated_scalar);  // not allocated with new
+
+    *pm = adopted_scalar;
+}
+
+void sp_scalar_constructor_hook(void * px, std::size_t, void *)
+{
+    sp_scalar_constructor_hook(px);
+}
+
+void sp_scalar_destructor_hook(void * p)
+{
+    if(p == 0) return;
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm == adopted_scalar);    // attempt to destroy nonmanaged block
+
+    *pm = allocated_scalar;
+}
+
+void sp_scalar_destructor_hook(void * px, std::size_t, void *)
+{
+    sp_scalar_destructor_hook(px);
+}
+
+// It is not possible to handle the array hooks in a portable manner.
+// The implementation typically reserves a bit of storage for the number
+// of objects in the array, and the argument of the array hook isn't
+// equal to the return value of operator new[].
+
+void sp_array_constructor_hook(void * /* p */)
+{
+/*
+    if(p == 0) return;
+
+    // adjust p depending on the implementation
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm != adopted_array);     // second smart array pointer to the same address
+    BOOST_ASSERT(*pm != allocated_scalar);  // allocated with new
+    BOOST_ASSERT(*pm == allocated_array);   // not allocated with new[]
+
+    *pm = adopted_array;
+*/
+}
+
+void sp_array_destructor_hook(void * /* p */)
+{
+/*
+    if(p == 0) return;
+
+    // adjust p depending on the implementation
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm == adopted_array); // attempt to destroy nonmanaged block
+
+    *pm = allocated_array;
+*/
+}
+
+} // namespace boost
+
+// operator delete
+
+void operator delete(void * p) throw()
+{
+    if(p == 0) return;
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm != deleted);           // double delete
+    BOOST_ASSERT(*pm != adopted_scalar);    // delete p.get();
+    BOOST_ASSERT(*pm != allocated_array);   // allocated with new[]
+    BOOST_ASSERT(*pm == allocated_scalar);  // not allocated with new
+
+    *pm = deleted;
+
+    free(pm);
+}
+
+#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+
+void operator delete(void * p, nothrow_t const &) throw()
+{
+    ::operator delete(p);
+}
+
+#endif
+
+void operator delete[](void * p) throw()
+{
+    if(p == 0) return;
+
+    int * pm = static_cast<int*>(p);
+    pm -= m;
+
+    BOOST_ASSERT(*pm != deleted);           // double delete
+    BOOST_ASSERT(*pm != adopted_scalar);    // delete p.get();
+    BOOST_ASSERT(*pm != allocated_scalar);  // allocated with new
+    BOOST_ASSERT(*pm == allocated_array);   // not allocated with new[]
+
+    *pm = deleted;
+
+    free(pm);
+}
+
+#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+
+void operator delete[](void * p, nothrow_t const &) throw()
+{
+    ::operator delete[](p);
+}
+
+#endif
+
+#endif // defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -0,0 +1,52 @@
+#  Boost.SmartPtr Library test Jamfile
+#
+#  Copyright (c) 2003-2007 Peter Dimov
+#  Copyright (c) 2003 Dave Abrahams
+#
+#  Distributed under the Boost Software License, Version 1.0. (See
+#  accompanying file LICENSE_1_0.txt or copy at
+#  http://www.boost.org/LICENSE_1_0.txt)
+
+# bring in rules for testing
+import testing ;
+
+{
+    test-suite "smart_ptr"
+        : [ run smart_ptr_test.cpp ]
+          [ run shared_ptr_basic_test.cpp : : : <toolset>gcc:<cxxflags>-Wno-non-virtual-dtor ]
+          [ run shared_ptr_test.cpp : : : <toolset>gcc:<cxxflags>-Wno-non-virtual-dtor ]
+          [ run weak_ptr_test.cpp ]
+          [ run shared_from_this_test.cpp : : : <toolset>gcc:<cxxflags>-Wno-non-virtual-dtor ]
+          [ run get_deleter_test.cpp ]
+          [ run intrusive_ptr_test.cpp ]
+          [ run atomic_count_test.cpp ]
+          [ run lw_mutex_test.cpp ]
+          [ compile-fail shared_ptr_assign_fail.cpp ]
+          [ compile-fail shared_ptr_delete_fail.cpp ]
+          [ compile-fail shared_ptr_compare_fail.cpp ]
+          [ run shared_ptr_alloc2_test.cpp ]
+          [ run pointer_cast_test.cpp ]
+          [ compile pointer_to_other_test.cpp ]
+          [ run auto_ptr_rv_test.cpp ]
+          [ run shared_ptr_alias_test.cpp ]
+          [ run shared_ptr_rv_test.cpp ]
+          [ run shared_ptr_move_test.cpp ]
+          [ compile-fail shared_ptr_pv_fail.cpp ]
+          [ run sp_unary_addr_test.cpp ]
+          [ compile-fail scoped_ptr_eq_fail.cpp ]
+          [ compile-fail scoped_array_eq_fail.cpp ]
+          [ run esft_regtest.cpp ]
+          [ run yield_k_test.cpp ]
+          [ run yield_k_test.cpp : : : <threading>multi : yield_k_test.mt ]
+          [ run spinlock_test.cpp ]
+          [ run spinlock_try_test.cpp ]
+          [ run spinlock_try_test.cpp : : : <threading>multi : spinlock_try_test.mt ]
+          [ run spinlock_pool_test.cpp ]
+          [ run make_shared_test.cpp ]
+          [ run sp_convertible_test.cpp ]
+          [ run wp_convertible_test.cpp ]
+          [ run ip_convertible_test.cpp ]
+          [ run allocate_shared_test.cpp ]
+          [ run sp_atomic_test.cpp ]
+        ;
+}
--- a/test/allocate_shared_test.cpp
+++ b/test/allocate_shared_test.cpp
@@ -0,0 +1,189 @@
+//  allocate_shared_test.cpp
+//
+//  Copyright (c) 2007, 2008 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/make_shared.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+class X
+{
+private:
+
+    X( X const & );
+    X & operator=( X const & );
+
+public:
+
+    static int instances;
+
+    int v;
+
+    explicit X( int a1 = 0, int a2 = 0, int a3 = 0, int a4 = 0, int a5 = 0, int a6 = 0, int a7 = 0, int a8 = 0, int a9 = 0 ): v( a1+a2+a3+a4+a5+a6+a7+a8+a9 )
+    {
+        ++instances;
+    }
+
+    ~X()
+    {
+        --instances;
+    }
+};
+
+int X::instances = 0;
+
+int main()
+{
+    {
+        boost::shared_ptr< int > pi = boost::allocate_shared< int >( std::allocator<int>() );
+
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( *pi == 0 );
+    }
+
+    {
+        boost::shared_ptr< int > pi = boost::allocate_shared< int >( std::allocator<int>(), 5 );
+
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( *pi == 5 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>() );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 0 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4, 5 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4, 5, 6 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4, 5, 6, 7 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4, 5, 6, 7, 8 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7+8 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::allocate_shared< X >( std::allocator<void>(), 1, 2, 3, 4, 5, 6, 7, 8, 9 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7+8+9 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    return boost::report_errors();
+}
--- a/test/atomic_count_test.cpp
+++ b/test/atomic_count_test.cpp
@@ -0,0 +1,40 @@
+//
+// atomic_count_test.cpp
+//
+// Copyright 2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/atomic_count.hpp>
+#include <boost/detail/lightweight_test.hpp>
+
+int main()
+{
+    boost::detail::atomic_count n( 4 );
+
+    BOOST_TEST( n == 4L );
+
+    ++n;
+
+    BOOST_TEST( n == 5L );
+    BOOST_TEST( --n != 0L );
+
+    boost::detail::atomic_count m( 0 );
+
+    BOOST_TEST( m == 0 );
+
+    ++m;
+
+    BOOST_TEST( m == 1 );
+
+    ++m;
+
+    BOOST_TEST( m == 2 );
+    BOOST_TEST( --m != 0 );
+    BOOST_TEST( --m == 0 );
+
+    return boost::report_errors();
+}
--- a/test/auto_ptr_rv_test.cpp
+++ b/test/auto_ptr_rv_test.cpp
@@ -0,0 +1,111 @@
+//
+//  auto_ptr_rv_test.cpp
+//
+//  Copyright (c) 2006 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/shared_ptr.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <memory>
+
+struct X
+{
+    static long instances;
+
+    X()
+    {
+        ++instances;
+    }
+
+    ~X()
+    {
+        --instances;
+    }
+
+    static std::auto_ptr<X> create()
+    {
+        return std::auto_ptr<X>( new X );
+    }
+
+private:
+
+    X( X const & );
+    X & operator=( X const & );
+};
+
+long X::instances = 0;
+
+int main()
+{
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<X> p( X::create() );
+        BOOST_TEST( X::instances == 1 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+
+        p.reset();
+        BOOST_TEST( X::instances == 0 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<X const> p( X::create() );
+        BOOST_TEST( X::instances == 1 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+
+        p.reset();
+        BOOST_TEST( X::instances == 0 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<void> p( X::create() );
+        BOOST_TEST( X::instances == 1 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+
+        p.reset();
+        BOOST_TEST( X::instances == 0 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<void const> p( X::create() );
+        BOOST_TEST( X::instances == 1 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+
+        p.reset();
+        BOOST_TEST( X::instances == 0 );
+
+        p = X::create();
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    return boost::report_errors();
+}
--- a/test/collector_test.cpp
+++ b/test/collector_test.cpp
@@ -0,0 +1,99 @@
+//
+//  collector_test.cpp
+//
+//  Copyright (c) 2003 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/shared_ptr.hpp>
+#include <vector>
+#include <iostream>
+#include <cstdlib>
+#include <ctime>
+
+// sp_collector.cpp exported functions
+
+std::size_t find_unreachable_objects(bool report);
+void free_unreachable_objects();
+
+struct X
+{
+    void* fill[32];
+    boost::shared_ptr<X> p;
+};
+
+void report()
+{
+    std::cout << "Calling find_unreachable_objects:\n";
+
+    std::clock_t t = std::clock();
+
+    std::size_t n = find_unreachable_objects(false);
+
+    t = std::clock() - t;
+
+    std::cout << n << " unreachable objects.\n";
+    std::cout << "  " << static_cast<double>(t) / CLOCKS_PER_SEC << " seconds.\n";
+}
+
+void free()
+{
+    std::cout << "Calling free_unreachable_objects:\n";
+
+    std::clock_t t = std::clock();
+
+    free_unreachable_objects();
+
+    t = std::clock() - t;
+
+    std::cout << "  " << static_cast<double>(t) / CLOCKS_PER_SEC << " seconds.\n";
+}
+
+int main()
+{
+    std::vector< boost::shared_ptr<X> > v1, v2;
+
+    int const n = 256 * 1024;
+
+    std::cout << "Filling v1 and v2\n";
+
+    for(int i = 0; i < n; ++i)
+    {
+        v1.push_back(boost::shared_ptr<X>(new X));
+        v2.push_back(boost::shared_ptr<X>(new X));
+    }
+
+    report();
+
+    std::cout << "Creating the cycles\n";
+
+    for(int i = 0; i < n - 1; ++i)
+    {
+        v2[i]->p = v2[i+1];
+    }
+
+    v2[n-1]->p = v2[0];
+
+    report();
+
+    std::cout << "Resizing v2 to size of 1\n";
+
+    v2.resize(1);
+    report();
+
+    std::cout << "Clearing v2\n";
+
+    v2.clear();
+    report();
+
+    std::cout << "Clearing v1\n";
+
+    v1.clear();
+    report();
+
+    free();
+    report();
+}
--- a/test/esft_regtest.cpp
+++ b/test/esft_regtest.cpp
@@ -0,0 +1,221 @@
+//
+//  esft_regtest.cpp
+//
+//  A regression test for enable_shared_from_this
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <memory>
+#include <string>
+
+class X: public boost::enable_shared_from_this< X >
+{
+private:
+
+    int destroyed_;
+    int deleted_;
+    int expected_;
+
+private:
+
+    X( X const& );
+    X& operator=( X const& );
+
+public:
+
+    static int instances;
+
+public:
+
+    explicit X( int expected ): destroyed_( 0 ), deleted_( 0 ), expected_( expected )
+    {
+        ++instances;
+    }
+
+    ~X()
+    {
+        BOOST_TEST( deleted_ == expected_ );
+        BOOST_TEST( destroyed_ == 0 );
+        ++destroyed_;
+        --instances;
+    }
+
+    typedef void (*deleter_type)( X* );
+
+    static void deleter( X * px )
+    {
+        ++px->deleted_;
+    }
+
+    static void deleter2( X * px )
+    {
+        ++px->deleted_;
+        delete px;
+    }
+};
+
+int X::instances = 0;
+
+void test()
+{
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        X x( 0 );
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        std::auto_ptr<X> px( new X( 0 ) );
+        BOOST_TEST( X::instances == 1 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<X> px( new X( 0 ) );
+        BOOST_TEST( X::instances == 1 );
+
+        boost::weak_ptr<X> wp( px );
+        BOOST_TEST( !wp.expired() );
+
+        px.reset();
+
+        BOOST_TEST( wp.expired() );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        X x( 1 );
+        boost::shared_ptr<X> px( &x, X::deleter );
+        BOOST_TEST( X::instances == 1 );
+
+        X::deleter_type * pd = boost::get_deleter<X::deleter_type>( px );
+        BOOST_TEST( pd != 0 && *pd == X::deleter );
+
+        boost::weak_ptr<X> wp( px );
+        BOOST_TEST( !wp.expired() );
+
+        px.reset();
+
+        BOOST_TEST( wp.expired() );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr<X> px( new X( 1 ), X::deleter2 );
+        BOOST_TEST( X::instances == 1 );
+
+        X::deleter_type * pd = boost::get_deleter<X::deleter_type>( px );
+        BOOST_TEST( pd != 0 && *pd == X::deleter2 );
+
+        boost::weak_ptr<X> wp( px );
+        BOOST_TEST( !wp.expired() );
+
+        px.reset();
+
+        BOOST_TEST( wp.expired() );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+}
+
+struct V: public boost::enable_shared_from_this<V>
+{
+    virtual ~V() {}
+    std::string m_;
+};
+
+struct V2
+{
+    virtual ~V2() {}
+    std::string m2_;
+};
+
+struct W: V2, V
+{
+};
+
+void test2()
+{
+    boost::shared_ptr<W> p( new W );
+}
+
+void test3()
+{
+    V * p = new W;
+    boost::shared_ptr<void> pv( p );
+    BOOST_TEST( pv.get() == p );
+    BOOST_TEST( pv.use_count() == 1 );
+}
+
+struct null_deleter
+{
+    void operator()( void const* ) const {}
+};
+
+void test4()
+{
+    boost::shared_ptr<V> pv( new V );
+    boost::shared_ptr<V> pv2( pv.get(), null_deleter() );
+    BOOST_TEST( pv2.get() == pv.get() );
+    BOOST_TEST( pv2.use_count() == 1 );
+}
+
+void test5()
+{
+    V v;
+
+    boost::shared_ptr<V> p1( &v, null_deleter() );
+    BOOST_TEST( p1.get() == &v );
+    BOOST_TEST( p1.use_count() == 1 );
+
+    try
+    {
+        p1->shared_from_this();
+    }
+    catch( ... )
+    {
+        BOOST_ERROR( "p1->shared_from_this() failed" );
+    }
+
+    p1.reset();
+
+    boost::shared_ptr<V> p2( &v, null_deleter() );
+    BOOST_TEST( p2.get() == &v );
+    BOOST_TEST( p2.use_count() == 1 );
+
+    try
+    {
+        p2->shared_from_this();
+    }
+    catch( ... )
+    {
+        BOOST_ERROR( "p2->shared_from_this() failed" );
+    }
+}
+
+int main()
+{
+    test();
+    test2();
+    test3();
+    test4();
+    test5();
+
+    return boost::report_errors();
+}
--- a/test/get_deleter_test.cpp
+++ b/test/get_deleter_test.cpp
@@ -0,0 +1,95 @@
+//
+//  get_deleter_test.cpp
+//
+//  Copyright (c) 2002 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/shared_ptr.hpp>
+#include <boost/detail/lightweight_test.hpp>
+
+struct deleter
+{
+    int data;
+
+    deleter(): data(0)
+    {
+    }
+
+    void operator()(void *)
+    {
+        BOOST_TEST(data == 17041);
+    }
+};
+
+struct deleter2
+{
+};
+
+struct X
+{
+};
+
+int main()
+{
+    {
+        boost::shared_ptr<X> p;
+
+        BOOST_TEST(boost::get_deleter<void>(p) == 0);
+        BOOST_TEST(boost::get_deleter<void const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2 const>(p) == 0);
+    }
+
+    {
+        boost::shared_ptr<X> p(new X);
+
+        BOOST_TEST(boost::get_deleter<void>(p) == 0);
+        BOOST_TEST(boost::get_deleter<void const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2 const>(p) == 0);
+    }
+
+    {
+        X x;
+        boost::shared_ptr<X> p(&x, deleter());
+
+        BOOST_TEST(boost::get_deleter<void>(p) == 0);
+        BOOST_TEST(boost::get_deleter<void const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int>(p) == 0);
+        BOOST_TEST(boost::get_deleter<int const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X>(p) == 0);
+        BOOST_TEST(boost::get_deleter<X const>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2>(p) == 0);
+        BOOST_TEST(boost::get_deleter<deleter2 const>(p) == 0);
+
+        deleter * q = boost::get_deleter<deleter>(p);
+
+        BOOST_TEST(q != 0);
+        BOOST_TEST(q->data == 0);
+
+        q->data = 17041;
+
+        deleter const * r = boost::get_deleter<deleter const>(p);
+
+        BOOST_TEST(r == q);
+        BOOST_TEST(r->data == 17041);
+    }
+
+    return boost::report_errors();
+}
--- a/test/intrusive_ptr_test.cpp
+++ b/test/intrusive_ptr_test.cpp
@@ -0,0 +1,561 @@
+#include <boost/config.hpp>
+
+#if defined(BOOST_MSVC)
+
+#pragma warning(disable: 4786)  // identifier truncated in debug info
+#pragma warning(disable: 4710)  // function not inlined
+#pragma warning(disable: 4711)  // function selected for automatic inline expansion
+#pragma warning(disable: 4514)  // unreferenced inline removed
+#pragma warning(disable: 4355)  // 'this' : used in base member initializer list
+#pragma warning(disable: 4511)  // copy constructor could not be generated
+#pragma warning(disable: 4512)  // assignment operator could not be generated
+
+#if (BOOST_MSVC >= 1310)
+#pragma warning(disable: 4675)  // resolved overload found with Koenig lookup
+#endif
+
+#endif
+
+//
+//  intrusive_ptr_test.cpp
+//
+//  Copyright (c) 2002-2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/intrusive_ptr.hpp>
+#include <boost/detail/atomic_count.hpp>
+#include <boost/config.hpp>
+#include <algorithm>
+#include <functional>
+
+//
+
+namespace N
+{
+
+class base
+{
+private:
+
+    boost::detail::atomic_count use_count_;
+
+    base(base const &);
+    base & operator=(base const &);
+
+protected:
+
+    base(): use_count_(0)
+    {
+    }
+
+    virtual ~base()
+    {
+    }
+
+public:
+
+    long use_count() const
+    {
+        return use_count_;
+    }
+
+#if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+
+    inline friend void intrusive_ptr_add_ref(base * p)
+    {
+        ++p->use_count_;
+    }
+
+    inline friend void intrusive_ptr_release(base * p)
+    {
+        if(--p->use_count_ == 0) delete p;
+    }
+
+#else
+
+    void add_ref()
+    {
+        ++use_count_;
+    }
+
+    void release()
+    {
+        if(--use_count_ == 0) delete this;
+    }
+
+#endif
+};
+
+} // namespace N
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+
+namespace boost
+{
+
+inline void intrusive_ptr_add_ref(N::base * p)
+{
+    p->add_ref();
+}
+
+inline void intrusive_ptr_release(N::base * p)
+{
+    p->release();
+}
+
+} // namespace boost
+
+#endif
+
+//
+
+struct X: public virtual N::base
+{
+};
+
+struct Y: public X
+{
+};
+
+//
+
+namespace n_element_type
+{
+
+void f(X &)
+{
+}
+
+void test()
+{
+    typedef boost::intrusive_ptr<X>::element_type T;
+    T t;
+    f(t);
+}
+
+} // namespace n_element_type
+
+namespace n_constructors
+{
+
+void default_constructor()
+{
+    boost::intrusive_ptr<X> px;
+    BOOST_TEST(px.get() == 0);
+}
+
+void pointer_constructor()
+{
+    {
+        boost::intrusive_ptr<X> px(0);
+        BOOST_TEST(px.get() == 0);
+    }
+
+    {
+        boost::intrusive_ptr<X> px(0, false);
+        BOOST_TEST(px.get() == 0);
+    }
+
+    {
+        X * p = new X;
+        BOOST_TEST(p->use_count() == 0);
+
+        boost::intrusive_ptr<X> px(p);
+        BOOST_TEST(px.get() == p);
+        BOOST_TEST(px->use_count() == 1);
+    }
+
+    {
+        X * p = new X;
+        BOOST_TEST(p->use_count() == 0);
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+        using boost::intrusive_ptr_add_ref;
+#endif
+        intrusive_ptr_add_ref(p);
+        BOOST_TEST(p->use_count() == 1);
+
+        boost::intrusive_ptr<X> px(p, false);
+        BOOST_TEST(px.get() == p);
+        BOOST_TEST(px->use_count() == 1);
+    }
+}
+
+void copy_constructor()
+{
+    {
+        boost::intrusive_ptr<X> px;
+        boost::intrusive_ptr<X> px2(px);
+        BOOST_TEST(px2.get() == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<Y> py;
+        boost::intrusive_ptr<X> px(py);
+        BOOST_TEST(px.get() == py.get());
+    }
+
+    {
+        boost::intrusive_ptr<X> px(0);
+        boost::intrusive_ptr<X> px2(px);
+        BOOST_TEST(px2.get() == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<Y> py(0);
+        boost::intrusive_ptr<X> px(py);
+        BOOST_TEST(px.get() == py.get());
+    }
+
+    {
+        boost::intrusive_ptr<X> px(0, false);
+        boost::intrusive_ptr<X> px2(px);
+        BOOST_TEST(px2.get() == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<Y> py(0, false);
+        boost::intrusive_ptr<X> px(py);
+        BOOST_TEST(px.get() == py.get());
+    }
+
+    {
+        boost::intrusive_ptr<X> px(new X);
+        boost::intrusive_ptr<X> px2(px);
+        BOOST_TEST(px2.get() == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<Y> py(new Y);
+        boost::intrusive_ptr<X> px(py);
+        BOOST_TEST(px.get() == py.get());
+    }
+}
+
+void test()
+{
+    default_constructor();
+    pointer_constructor();
+    copy_constructor();
+}
+
+} // namespace n_constructors
+
+namespace n_destructor
+{
+
+void test()
+{
+    boost::intrusive_ptr<X> px(new X);
+    BOOST_TEST(px->use_count() == 1);
+
+    {
+        boost::intrusive_ptr<X> px2(px);
+        BOOST_TEST(px->use_count() == 2);
+    }
+
+    BOOST_TEST(px->use_count() == 1);
+}
+
+} // namespace n_destructor
+
+namespace n_assignment
+{
+
+void copy_assignment()
+{
+}
+
+void conversion_assignment()
+{
+}
+
+void pointer_assignment()
+{
+}
+
+void test()
+{
+    copy_assignment();
+    conversion_assignment();
+    pointer_assignment();
+}
+
+} // namespace n_assignment
+
+namespace n_access
+{
+
+void test()
+{
+    {
+        boost::intrusive_ptr<X> px;
+        BOOST_TEST(px? false: true);
+        BOOST_TEST(!px);
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+        using boost::get_pointer;
+#endif
+
+        BOOST_TEST(get_pointer(px) == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<X> px(0);
+        BOOST_TEST(px? false: true);
+        BOOST_TEST(!px);
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+        using boost::get_pointer;
+#endif
+
+        BOOST_TEST(get_pointer(px) == px.get());
+    }
+
+    {
+        boost::intrusive_ptr<X> px(new X);
+        BOOST_TEST(px? true: false);
+        BOOST_TEST(!!px);
+        BOOST_TEST(&*px == px.get());
+        BOOST_TEST(px.operator ->() == px.get());
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+        using boost::get_pointer;
+#endif
+
+        BOOST_TEST(get_pointer(px) == px.get());
+    }
+}
+
+} // namespace n_access
+
+namespace n_swap
+{
+
+void test()
+{
+    {
+        boost::intrusive_ptr<X> px;
+        boost::intrusive_ptr<X> px2;
+
+        px.swap(px2);
+
+        BOOST_TEST(px.get() == 0);
+        BOOST_TEST(px2.get() == 0);
+
+        using std::swap;
+        swap(px, px2);
+
+        BOOST_TEST(px.get() == 0);
+        BOOST_TEST(px2.get() == 0);
+    }
+
+    {
+        X * p = new X;
+        boost::intrusive_ptr<X> px;
+        boost::intrusive_ptr<X> px2(p);
+        boost::intrusive_ptr<X> px3(px2);
+
+        px.swap(px2);
+
+        BOOST_TEST(px.get() == p);
+        BOOST_TEST(px->use_count() == 2);
+        BOOST_TEST(px2.get() == 0);
+        BOOST_TEST(px3.get() == p);
+        BOOST_TEST(px3->use_count() == 2);
+
+        using std::swap;
+        swap(px, px2);
+
+        BOOST_TEST(px.get() == 0);
+        BOOST_TEST(px2.get() == p);
+        BOOST_TEST(px2->use_count() == 2);
+        BOOST_TEST(px3.get() == p);
+        BOOST_TEST(px3->use_count() == 2);
+    }
+
+    {
+        X * p1 = new X;
+        X * p2 = new X;
+        boost::intrusive_ptr<X> px(p1);
+        boost::intrusive_ptr<X> px2(p2);
+        boost::intrusive_ptr<X> px3(px2);
+
+        px.swap(px2);
+
+        BOOST_TEST(px.get() == p2);
+        BOOST_TEST(px->use_count() == 2);
+        BOOST_TEST(px2.get() == p1);
+        BOOST_TEST(px2->use_count() == 1);
+        BOOST_TEST(px3.get() == p2);
+        BOOST_TEST(px3->use_count() == 2);
+
+        using std::swap;
+        swap(px, px2);
+
+        BOOST_TEST(px.get() == p1);
+        BOOST_TEST(px->use_count() == 1);
+        BOOST_TEST(px2.get() == p2);
+        BOOST_TEST(px2->use_count() == 2);
+        BOOST_TEST(px3.get() == p2);
+        BOOST_TEST(px3->use_count() == 2);
+    }
+}
+
+} // namespace n_swap
+
+namespace n_comparison
+{
+
+template<class T, class U> void test2(boost::intrusive_ptr<T> const & p, boost::intrusive_ptr<U> const & q)
+{
+    BOOST_TEST((p == q) == (p.get() == q.get()));
+    BOOST_TEST((p != q) == (p.get() != q.get()));
+}
+
+template<class T> void test3(boost::intrusive_ptr<T> const & p, boost::intrusive_ptr<T> const & q)
+{
+    BOOST_TEST((p == q) == (p.get() == q.get()));
+    BOOST_TEST((p.get() == q) == (p.get() == q.get()));
+    BOOST_TEST((p == q.get()) == (p.get() == q.get()));
+    BOOST_TEST((p != q) == (p.get() != q.get()));
+    BOOST_TEST((p.get() != q) == (p.get() != q.get()));
+    BOOST_TEST((p != q.get()) == (p.get() != q.get()));
+
+    // 'less' moved here as a g++ 2.9x parse error workaround
+    std::less<T*> less;
+    BOOST_TEST((p < q) == less(p.get(), q.get()));
+}
+
+void test()
+{
+    {
+        boost::intrusive_ptr<X> px;
+        test3(px, px);
+
+        boost::intrusive_ptr<X> px2;
+        test3(px, px2);
+
+        boost::intrusive_ptr<X> px3(px);
+        test3(px3, px3);
+        test3(px, px3);
+    }
+
+    {
+        boost::intrusive_ptr<X> px;
+
+        boost::intrusive_ptr<X> px2(new X);
+        test3(px, px2);
+        test3(px2, px2);
+
+        boost::intrusive_ptr<X> px3(new X);
+        test3(px2, px3);
+
+        boost::intrusive_ptr<X> px4(px2);
+        test3(px2, px4);
+        test3(px4, px4);
+    }
+
+    {
+        boost::intrusive_ptr<X> px(new X);
+
+        boost::intrusive_ptr<Y> py(new Y);
+        test2(px, py);
+
+        boost::intrusive_ptr<X> px2(py);
+        test2(px2, py);
+        test3(px, px2);
+        test3(px2, px2);
+    }
+}
+
+} // namespace n_comparison
+
+namespace n_static_cast
+{
+
+void test()
+{
+}
+
+} // namespace n_static_cast
+
+namespace n_dynamic_cast
+{
+
+void test()
+{
+}
+
+} // namespace n_dynamic_cast
+
+namespace n_transitive
+{
+
+struct X: public N::base
+{
+    boost::intrusive_ptr<X> next;
+};
+
+void test()
+{
+    boost::intrusive_ptr<X> p(new X);
+    p->next = boost::intrusive_ptr<X>(new X);
+    BOOST_TEST(!p->next->next);
+    p = p->next;
+    BOOST_TEST(!p->next);
+}
+
+} // namespace n_transitive
+
+namespace n_report_1
+{
+
+class foo: public N::base
+{ 
+public: 
+
+    foo(): m_self(this)
+    {
+    } 
+
+    void suicide()
+    {
+        m_self = 0;
+    }
+
+private:
+
+    boost::intrusive_ptr<foo> m_self;
+}; 
+
+void test()
+{
+    foo * foo_ptr = new foo;
+    foo_ptr->suicide();
+} 
+
+} // namespace n_report_1
+
+int main()
+{
+    n_element_type::test();
+    n_constructors::test();
+    n_destructor::test();
+    n_assignment::test();
+    n_access::test();
+    n_swap::test();
+    n_comparison::test();
+    n_static_cast::test();
+    n_dynamic_cast::test();
+
+    n_transitive::test();
+    n_report_1::test();
+
+    return boost::report_errors();
+}
--- a/test/ip_convertible_test.cpp
+++ b/test/ip_convertible_test.cpp
@@ -0,0 +1,54 @@
+#include <boost/config.hpp>
+
+//  wp_convertible_test.cpp
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/intrusive_ptr.hpp>
+
+//
+
+struct W
+{
+};
+
+void intrusive_ptr_add_ref( W* )
+{
+}
+
+void intrusive_ptr_release( W* )
+{
+}
+
+struct X: public virtual W
+{
+};
+
+struct Y: public virtual W
+{
+};
+
+struct Z: public X
+{
+};
+
+int f( boost::intrusive_ptr<X> )
+{
+    return 1;
+}
+
+int f( boost::intrusive_ptr<Y> )
+{
+    return 2;
+}
+
+int main()
+{
+    BOOST_TEST( 1 == f( boost::intrusive_ptr<Z>() ) );
+    return boost::report_errors();
+}
--- a/test/lw_mutex_test.cpp
+++ b/test/lw_mutex_test.cpp
@@ -0,0 +1,28 @@
+//
+// lw_mutex_test.cpp
+//
+// Copyright 2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/detail/lightweight_mutex.hpp>
+
+// Sanity check only
+
+boost::detail::lightweight_mutex m1;
+
+int main()
+{
+    boost::detail::lightweight_mutex::scoped_lock lock1( m1 );
+
+    boost::detail::lightweight_mutex m2;
+    boost::detail::lightweight_mutex m3;
+
+    boost::detail::lightweight_mutex::scoped_lock lock2( m2 );
+    boost::detail::lightweight_mutex::scoped_lock lock3( m3 );
+
+    return 0;
+}
--- a/test/make_shared_test.cpp
+++ b/test/make_shared_test.cpp
@@ -0,0 +1,189 @@
+//  make_shared_test.cpp
+//
+//  Copyright (c) 2007, 2008 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/make_shared.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+class X
+{
+private:
+
+    X( X const & );
+    X & operator=( X const & );
+
+public:
+
+    static int instances;
+
+    int v;
+
+    explicit X( int a1 = 0, int a2 = 0, int a3 = 0, int a4 = 0, int a5 = 0, int a6 = 0, int a7 = 0, int a8 = 0, int a9 = 0 ): v( a1+a2+a3+a4+a5+a6+a7+a8+a9 )
+    {
+        ++instances;
+    }
+
+    ~X()
+    {
+        --instances;
+    }
+};
+
+int X::instances = 0;
+
+int main()
+{
+    {
+        boost::shared_ptr< int > pi = boost::make_shared< int >();
+
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( *pi == 0 );
+    }
+
+    {
+        boost::shared_ptr< int > pi = boost::make_shared< int >( 5 );
+
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( *pi == 5 );
+    }
+
+    BOOST_TEST( X::instances == 0 );
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >();
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 0 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4, 5 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4, 5, 6 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4, 5, 6, 7 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4, 5, 6, 7, 8 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7+8 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        boost::shared_ptr< X > pi = boost::make_shared< X >( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
+        boost::weak_ptr<X> wp( pi );
+
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( pi.get() != 0 );
+        BOOST_TEST( pi->v == 1+2+3+4+5+6+7+8+9 );
+
+        pi.reset();
+
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    return boost::report_errors();
+}
--- a/test/pointer_cast_test.cpp
+++ b/test/pointer_cast_test.cpp
@@ -0,0 +1,126 @@
+//
+//  pointer_cast_test.cpp - a test for boost/pointer_cast.hpp
+//
+//  Copyright (c) 2005 Ion Gaztanaga
+//  Copyright (c) 2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/pointer_cast.hpp>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/scoped_ptr.hpp>
+#include <boost/get_pointer.hpp>
+
+#include <boost/detail/lightweight_test.hpp>
+
+namespace
+{
+
+// Let's create these inheritance relationship:
+//
+//    base   base2
+//      |     |
+//      derived
+//         |
+//  derived_derived
+//
+
+class base
+{
+   public:
+   virtual ~base(){}
+   int filler [5];
+};
+
+class base2
+{
+public:
+
+    virtual ~base2(){}
+    int filler [5];
+};
+
+class derived
+   : public base, public base2 
+{
+    int filler [5];
+};
+
+class derived_derived
+   : public derived
+{
+    int filler [5];
+};
+
+// And now some simple check functions
+
+template <class BasePtr>
+bool check_dynamic_pointer_cast(const BasePtr &ptr)
+{
+   //Check that dynamic_pointer_cast versus dynamic_cast
+   return
+   //Correct cast with dynamic_pointer_cast
+   boost::get_pointer(boost::dynamic_pointer_cast<derived>(ptr)) ==
+      //Correct cast with dynamic_cast
+      dynamic_cast<derived*>(boost::get_pointer(ptr)) 
+   &&
+   //Incorrect cast with dynamic_pointer_cast
+   boost::get_pointer(boost::dynamic_pointer_cast<derived_derived>(ptr)) ==
+      //Incorrect cast with dynamic_cast
+      dynamic_cast<derived_derived*>(boost::get_pointer(ptr));
+}
+
+template <class BasePtr>
+bool check_static_pointer_cast(const BasePtr &ptr)
+{
+   return
+   //Cast base -> derived -> base2 using static_pointer_cast
+   boost::get_pointer(
+            boost::static_pointer_cast<base2>(
+               boost::static_pointer_cast<derived>(ptr))) ==
+   //Now the same with static_cast
+   static_cast<base2*>(static_cast<derived*>(boost::get_pointer(ptr)));
+}
+
+template <class BasePtr>
+bool check_const_pointer_cast(const BasePtr &ptr)
+{
+   return   
+   //Unconst and const again using const_pointer_cast
+   boost::get_pointer(
+      boost::const_pointer_cast<const base>
+         (boost::const_pointer_cast<base>(ptr))) ==
+   //Now the same with const_cast
+   const_cast<const base*>(const_cast<base*>(boost::get_pointer(ptr)));
+}
+
+}
+
+int main()
+{
+    {
+        // Try casts with shared_ptr
+
+        boost::shared_ptr<base> ptr(new derived);
+
+        BOOST_TEST( check_dynamic_pointer_cast( ptr ) );
+        BOOST_TEST( check_static_pointer_cast( ptr ) );
+        BOOST_TEST( check_const_pointer_cast( ptr ) );
+    }
+   
+    {
+        // Try casts with raw pointer
+
+        boost::scoped_ptr<base> ptr(new derived);
+
+        BOOST_TEST( check_dynamic_pointer_cast( ptr.get() ) );
+        BOOST_TEST( check_static_pointer_cast( ptr.get() ) );
+        BOOST_TEST( check_const_pointer_cast( ptr.get() ) );
+    }
+    
+    return boost::report_errors();
+}
--- a/test/pointer_to_other_test.cpp
+++ b/test/pointer_to_other_test.cpp
@@ -0,0 +1,74 @@
+//
+//  pointer_to_other_test.cpp - a test for boost/pointer_to_other.hpp
+//
+//  Copyright (c) 2005 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/pointer_to_other.hpp>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/shared_array.hpp>
+#include <boost/scoped_ptr.hpp>
+#include <boost/scoped_array.hpp>
+#include <boost/intrusive_ptr.hpp>
+
+#include <memory>
+
+template<class T, class U> void assert_same_type( T** pt = 0, U** pu = 0 )
+{
+    pt = pu;
+}
+
+struct X;
+struct Y;
+
+int main()
+{
+    // shared_ptr
+
+    assert_same_type< boost::pointer_to_other< boost::shared_ptr<X>, Y >::type, boost::shared_ptr<Y> >();
+    assert_same_type< boost::pointer_to_other< boost::shared_ptr<X>, void >::type, boost::shared_ptr<void> >();
+    assert_same_type< boost::pointer_to_other< boost::shared_ptr<void>, Y >::type, boost::shared_ptr<Y> >();
+
+    // shared_array
+
+    assert_same_type< boost::pointer_to_other< boost::shared_array<X>, Y >::type, boost::shared_array<Y> >();
+    assert_same_type< boost::pointer_to_other< boost::shared_array<X>, void >::type, boost::shared_array<void> >();
+    assert_same_type< boost::pointer_to_other< boost::shared_array<void>, Y >::type, boost::shared_array<Y> >();
+
+    // scoped_ptr
+
+    assert_same_type< boost::pointer_to_other< boost::scoped_ptr<X>, Y >::type, boost::scoped_ptr<Y> >();
+    assert_same_type< boost::pointer_to_other< boost::scoped_ptr<X>, void >::type, boost::scoped_ptr<void> >();
+    assert_same_type< boost::pointer_to_other< boost::scoped_ptr<void>, Y >::type, boost::scoped_ptr<Y> >();
+
+    // scoped_array
+
+    assert_same_type< boost::pointer_to_other< boost::scoped_array<X>, Y >::type, boost::scoped_array<Y> >();
+    assert_same_type< boost::pointer_to_other< boost::scoped_array<X>, void >::type, boost::scoped_array<void> >();
+    assert_same_type< boost::pointer_to_other< boost::scoped_array<void>, Y >::type, boost::scoped_array<Y> >();
+
+    // intrusive_ptr
+
+    assert_same_type< boost::pointer_to_other< boost::intrusive_ptr<X>, Y >::type, boost::intrusive_ptr<Y> >();
+    assert_same_type< boost::pointer_to_other< boost::intrusive_ptr<X>, void >::type, boost::intrusive_ptr<void> >();
+    assert_same_type< boost::pointer_to_other< boost::intrusive_ptr<void>, Y >::type, boost::intrusive_ptr<Y> >();
+
+    // auto_ptr
+
+    assert_same_type< boost::pointer_to_other< std::auto_ptr<X>, Y >::type, std::auto_ptr<Y> >();
+    assert_same_type< boost::pointer_to_other< std::auto_ptr<X>, void >::type, std::auto_ptr<void> >();
+    assert_same_type< boost::pointer_to_other< std::auto_ptr<void>, Y >::type, std::auto_ptr<Y> >();
+
+    // raw pointer
+   
+    assert_same_type< boost::pointer_to_other< X *, Y >::type, Y * >();
+    assert_same_type< boost::pointer_to_other< X *, void >::type, void * >();
+    assert_same_type< boost::pointer_to_other< void *, Y >::type, Y * >();
+
+    return 0;
+}
--- a/test/scoped_array_eq_fail.cpp
+++ b/test/scoped_array_eq_fail.cpp
@@ -0,0 +1,27 @@
+#include <boost/config.hpp>
+
+#if defined(BOOST_MSVC)
+#pragma warning(disable: 4786)  // identifier truncated in debug info
+#pragma warning(disable: 4710)  // function not inlined
+#pragma warning(disable: 4711)  // function selected for automatic inline expansion
+#pragma warning(disable: 4514)  // unreferenced inline removed
+#endif
+
+//
+// scoped_array_eq_fail.cpp - a negative test for "p == q"
+//
+// Copyright (c) 2008 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/scoped_array.hpp>
+
+int main()
+{
+    boost::scoped_array<int> p, q;
+    p == q; // must fail
+    return 0;
+}
--- a/test/scoped_ptr_eq_fail.cpp
+++ b/test/scoped_ptr_eq_fail.cpp
@@ -0,0 +1,27 @@
+#include <boost/config.hpp>
+
+#if defined(BOOST_MSVC)
+#pragma warning(disable: 4786)  // identifier truncated in debug info
+#pragma warning(disable: 4710)  // function not inlined
+#pragma warning(disable: 4711)  // function selected for automatic inline expansion
+#pragma warning(disable: 4514)  // unreferenced inline removed
+#endif
+
+//
+// scoped_ptr_eq_fail.cpp - a negative test for "p == q"
+//
+// Copyright (c) 2008 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <boost/scoped_ptr.hpp>
+
+int main()
+{
+    boost::scoped_ptr<int> p, q;
+    p == q; // must fail
+    return 0;
+}
--- a/test/shared_from_this_test.cpp
+++ b/test/shared_from_this_test.cpp
@@ -0,0 +1,154 @@
+#include <boost/config.hpp>
+
+#if defined(BOOST_MSVC)
+#pragma warning(disable: 4786)  // identifier truncated in debug info
+#pragma warning(disable: 4710)  // function not inlined
+#pragma warning(disable: 4711)  // function selected for automatic inline expansion
+#pragma warning(disable: 4514)  // unreferenced inline removed
+#endif
+
+//
+//  shared_from_this_test.cpp
+//
+//  Copyright (c) 2002, 2003 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+
+
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/shared_ptr.hpp>
+
+#include <boost/detail/lightweight_test.hpp>
+
+//
+
+class X
+{
+public:
+
+    virtual void f() = 0;
+
+protected:
+
+    ~X() {}
+};
+
+class Y
+{
+public:
+
+    virtual boost::shared_ptr<X> getX() = 0;
+
+protected:
+
+    ~Y() {}
+};
+
+boost::shared_ptr<Y> createY();
+
+void test()
+{
+    boost::shared_ptr<Y> py = createY();
+    BOOST_TEST(py.get() != 0);
+    BOOST_TEST(py.use_count() == 1);
+
+    boost::shared_ptr<X> px = py->getX();
+    BOOST_TEST(px.get() != 0);
+    BOOST_TEST(py.use_count() == 2);
+
+    px->f();
+
+    boost::shared_ptr<Y> py2 = boost::dynamic_pointer_cast<Y>(px);
+    BOOST_TEST(py.get() == py2.get());
+    BOOST_TEST(!(py < py2 || py2 < py));
+    BOOST_TEST(py.use_count() == 3);
+}
+
+void test2();
+void test3();
+
+int main()
+{
+    test();
+    test2();
+    test3();
+    return boost::report_errors();
+}
+
+// virtual inheritance to stress the implementation
+// (prevents Y* -> impl*, enable_shared_from_this<impl>* -> impl* casts)
+
+class impl: public X, public virtual Y, public virtual boost::enable_shared_from_this<impl>
+{
+public:
+
+    virtual void f()
+    {
+    }
+
+    virtual boost::shared_ptr<X> getX()
+    {
+        boost::shared_ptr<impl> pi = shared_from_this();
+        BOOST_TEST(pi.get() == this);
+        return pi;
+    }
+};
+
+// intermediate impl2 to stress the implementation
+
+class impl2: public impl
+{
+};
+
+boost::shared_ptr<Y> createY()
+{
+    boost::shared_ptr<Y> pi(new impl2);
+    return pi;
+}
+
+void test2()
+{
+    boost::shared_ptr<Y> pi(static_cast<impl2*>(0));
+}
+
+//
+
+struct V: public boost::enable_shared_from_this<V>
+{
+};
+
+void test3()
+{
+    boost::shared_ptr<V> p(new V);
+
+    boost::shared_ptr<V> q = p->shared_from_this();
+    BOOST_TEST(p == q);
+    BOOST_TEST(!(p < q) && !(q < p));
+
+    V v2(*p);
+
+    try
+    {
+        boost::shared_ptr<V> r = v2.shared_from_this();
+        BOOST_TEST( p < r || r < p );
+        BOOST_TEST( r.get() == &v2 );
+    }
+    catch(boost::bad_weak_ptr const &)
+    {
+    }
+
+    try
+    {
+        *p = V();
+        boost::shared_ptr<V> r = p->shared_from_this();
+        BOOST_TEST(p == r);
+        BOOST_TEST(!(p < r) && !(r < p));
+    }
+    catch(boost::bad_weak_ptr const &)
+    {
+        BOOST_ERROR("p->shared_from_this() threw bad_weak_ptr after *p = V()");
+    }
+}
--- a/Show More
+++ b/Show More