Fix typo, trailing whitespace

This reverts commit 8afe162910.

.travis.yml

@@ -37,6 +37,10 @@ matrix:
       compiler: g++
       env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11,14
 
+    - os: freebsd
+      compiler: clang++
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,17,2a
+
     - os: linux
       compiler: g++-4.4
       env: TOOLSET=gcc COMPILER=g++-4.4 CXXSTD=98,0x
@@ -156,6 +160,28 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=03,11,14
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=17,2a
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       compiler: g++-7
       env: UBSAN=1 TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11,14,17 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
@@ -399,6 +425,7 @@ install:
   - git submodule init tools/boost_install
   - git submodule init tools/cmake
   - git submodule init libs/preprocessor
+  - git submodule init libs/bind
   - git submodule update # no --jobs 3 on non-amd64
   - cp -r $TRAVIS_BUILD_DIR/* libs/smart_ptr
   - ./bootstrap.sh

appveyor.yml

@@ -70,6 +70,7 @@ install:
   - git submodule init tools/build
   - git submodule init libs/headers
   - git submodule init tools/boost_install
+  - git submodule init libs/bind
   - git submodule update --jobs 3
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\smart_ptr\
   - cmd /c bootstrap

doc/smart_ptr.adoc

@@ -37,6 +37,7 @@ include::smart_ptr/pointer_to_other.adoc[]
 include::smart_ptr/atomic_shared_ptr.adoc[]
 include::smart_ptr/owner_less.adoc[]
 include::smart_ptr/owner_equal_to.adoc[]
+include::smart_ptr/owner_hash.adoc[]
 
 // appendix
 include::smart_ptr/techniques.adoc[]

doc/smart_ptr/changelog.adoc

@@ -1,5 +1,5 @@
 ////
-Copyright 2019 Peter Dimov
+Copyright 2019, 2020 Peter Dimov
 
 Distributed under the Boost Software License, Version 1.0.
 
@@ -16,7 +16,11 @@ http://www.boost.org/LICENSE_1_0.txt
 ## Changes in 1.74.0
 
 * Added `owner_equals` to `shared_ptr`, `weak_ptr`, `local_shared_ptr`
-* Added `owner_equal_to`
+* Added `owner_hash_value` to `shared_ptr`, `weak_ptr`
+* Added `owner_equal_to`, `owner_hash`
+* Added `std::hash` specializations for `shared_ptr`, `local_shared_ptr`
+* Added `boost::hash` support to, and `std::hash`, `std::equal_to`
+  specializations for, `weak_ptr`
 
 ## Changes in 1.72.0
 

doc/smart_ptr/owner_hash.adoc

@@ -0,0 +1,56 @@
+////
+Copyright 2020 Peter Dimov
+Distributed under the Boost Software License, Version 1.0.
+https://www.boost.org/LICENSE_1_0.txt
+////
+
+[#owner_hash]
+# owner_hash
+:toc:
+:toc-title:
+:idprefix: owner_hash_to_
+
+## Description
+
+`owner_hash<T>` is a helper function object that takes a smart pointer `p`
+and returns `p.owner_hash_value()`. It's useful for creating unordered
+containers of `shared_ptr` that use ownership-based equality, instead of
+the default pointer value equality. (It can be used with `weak_ptr` too,
+but there's no need, because `boost::hash` and `std::hash` for `weak_ptr`
+already use ownership-based equality.)
+
+## Example
+
+```
+std::unordered_set< boost::shared_ptr<void>,
+  boost::owner_hash< boost::shared_ptr<void> >,
+  boost::owner_equal_to< boost::shared_ptr<void> > > set;
+```
+
+## Synopsis
+
+`owner_hash` is defined in `<boost/smart_ptr/owner_hash.hpp>`.
+
+```
+namespace boost {
+
+  template<class T> struct owner_hash
+  {
+    typedef std::size_t result_type;
+    typedef T argument_type;
+
+    std::size_t operator()( T const & p ) const noexcept;
+  };
+}
+```
+
+## Members
+
+```
+std::size_t operator()( T const & p ) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `p.owner_hash_value()`.

doc/smart_ptr/shared_ptr.adoc

@@ -183,6 +183,8 @@ namespace boost {
 
     template<class Y> bool owner_equals(shared_ptr<Y> const & r) const noexcept;
     template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -677,6 +679,17 @@ template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
 Returns::
   `true` if and only if `*this` and `r` share ownership or are both empty.
 
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
+
 ## Free Functions
 
 ### comparison

doc/smart_ptr/weak_ptr.adoc

@@ -115,6 +115,8 @@ namespace boost {
 
     template<class Y> bool owner_equals( weak_ptr<Y> const & r ) const noexcept;
     template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -298,6 +300,17 @@ template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
 Returns::
   `true` if and only if `*this` and `r` share ownership or are both empty.
 
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
+
 ## Free Functions
 
 ### comparison

include/boost/detail/lightweight_thread.hpp

@@ -21,168 +21,6 @@
 //  template<class F> int lw_thread_create( lw_thread_t & th, F f );
 //  void lw_thread_join( lw_thread_t th );
 
-
-#include <boost/config.hpp>
-#include <memory>
-#include <cerrno>
-
-#if defined( BOOST_HAS_PTHREADS )
-
-#include <pthread.h>
-
-namespace boost
-{
-namespace detail
-{
-
-typedef ::pthread_t lw_thread_t;
-
-inline int lw_thread_create_( lw_thread_t* thread, const pthread_attr_t* attr, void* (*start_routine)( void* ), void* arg )
-{
-    return ::pthread_create( thread, attr, start_routine, arg );
-}
-
-inline void lw_thread_join( lw_thread_t th )
-{
-    ::pthread_join( th, 0 );
-}
-
-} // namespace detail
-} // namespace boost
-
-#else // defined( BOOST_HAS_PTHREADS )
-
-#include <windows.h>
-#include <process.h>
-
-namespace boost
-{
-namespace detail
-{
-
-typedef HANDLE lw_thread_t;
-
-inline int lw_thread_create_( lw_thread_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 EAGAIN;
-    }
-}
-
-inline void lw_thread_join( lw_thread_t thread )
-{
-    ::WaitForSingleObject( thread, INFINITE );
-    ::CloseHandle( thread );
-}
-
-} // namespace detail
-} // namespace boost
-
-#endif // defined( BOOST_HAS_PTHREADS )
-
-
-namespace boost
-{
-namespace detail
-{
-
-class lw_abstract_thread
-{
-public:
-
-    virtual ~lw_abstract_thread() {}
-    virtual void run() = 0;
-};
-
-#if defined( BOOST_HAS_PTHREADS )
-
-extern "C" void * lw_thread_routine( void * pv )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#endif
-
-    pt->run();
-
-    return 0;
-}
-
-#else
-
-unsigned __stdcall lw_thread_routine( void * pv )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#endif
-
-    pt->run();
-
-    return 0;
-}
-
-#endif
-
-template<class F> class lw_thread_impl: public lw_abstract_thread
-{
-public:
-
-    explicit lw_thread_impl( F f ): f_( f )
-    {
-    }
-
-    void run()
-    {
-        f_();
-    }
-
-private:
-
-    F f_;
-};
-
-template<class F> int lw_thread_create( lw_thread_t & th, F f )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
-
-#endif
-
-    int r = lw_thread_create_( &th, 0, lw_thread_routine, p.get() );
-
-    if( r == 0 )
-    {
-        p.release();
-    }
-
-    return r;
-}
-
-} // namespace detail
-} // namespace boost
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
 
 #endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED

include/boost/smart_ptr/detail/atomic_count.hpp

@@ -43,8 +43,9 @@
 //    Memory Ordering: acquire/release
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( BOOST_AC_DISABLE_THREADS )
 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
@@ -73,15 +74,18 @@
 #elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
 
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+# include <boost/smart_ptr/detail/atomic_count_gcc_atomic.hpp>
+
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
 
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
+# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
+
 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
 # include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
-# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
-
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
 # include <boost/smart_ptr/detail/atomic_count_win32.hpp>
 

include/boost/smart_ptr/detail/atomic_count_gcc.hpp

@@ -23,6 +23,13 @@
 # include <bits/atomicity.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using libstdc++ atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_gcc_atomic.hpp

@@ -0,0 +1,63 @@
+#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED
+
+// boost/detail/atomic_count_gcc_atomic.hpp
+//
+// atomic_count for g++ 4.7+
+//
+// Copyright 2007, 2020 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/cstdint.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic atomic_count")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+public:
+
+    explicit atomic_count( long v ): value_( static_cast< boost::int_least32_t >( v ) )
+    {
+    }
+
+    long operator++()
+    {
+        return __atomic_add_fetch( &value_, +1, __ATOMIC_ACQ_REL );
+    }
+
+    long operator--()
+    {
+        return __atomic_add_fetch( &value_, -1, __ATOMIC_ACQ_REL );
+    }
+
+    operator long() const
+    {
+        return __atomic_load_n( &value_, __ATOMIC_ACQUIRE );
+    }
+
+private:
+
+    atomic_count(atomic_count const &);
+    atomic_count & operator=(atomic_count const &);
+
+    boost::int_least32_t value_;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED

include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp

@@ -13,6 +13,17 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/x86 atomic_count")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_nt.hpp

@@ -15,6 +15,13 @@
 //  http://www.boost.org/LICENSE_1_0.txt
 //
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded, non-atomic atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_pt.hpp

@@ -14,6 +14,13 @@
 #include <boost/assert.hpp>
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex atomic_count")
+
+#endif
+
 //
 //  The generic pthread_mutex-based implementation sometimes leads to
 //    inefficiencies. Example: a class with two atomic_count members

include/boost/smart_ptr/detail/atomic_count_solaris.hpp

@@ -1,59 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
-#define BOOST_SMART_PTR_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_SMART_PTR_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED

include/boost/smart_ptr/detail/atomic_count_spin.hpp

@@ -13,6 +13,13 @@
 
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using spinlock-based atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_std_atomic.hpp

@@ -16,6 +16,13 @@
 #include <atomic>
 #include <cstdint>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_sync.hpp

@@ -15,10 +15,19 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/cstdint.hpp>
+
 #if defined( __ia64__ ) && defined( __INTEL_COMPILER )
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync atomic_count")
+
+#endif
+
 namespace boost
 {
 
@@ -29,7 +38,9 @@ class atomic_count
 {
 public:
 
-    explicit atomic_count( long v ) : value_( v ) {}
+    explicit atomic_count( long v ): value_( static_cast< boost::int_least32_t >( v ) )
+    {
+    }
 
     long operator++()
     {
@@ -51,7 +62,7 @@ private:
     atomic_count(atomic_count const &);
     atomic_count & operator=(atomic_count const &);
 
-    mutable long value_;
+    mutable boost::int_least32_t value_;
 };
 
 } // namespace detail

include/boost/smart_ptr/detail/atomic_count_win32.hpp

@@ -19,6 +19,13 @@
 
 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/lightweight_thread.hpp

@@ -0,0 +1,188 @@
+#ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  boost/detail/lightweight_thread.hpp
+//
+//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2008, 2018 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
+//
+//
+//  typedef /*...*/ lw_thread_t; // as pthread_t
+//  template<class F> int lw_thread_create( lw_thread_t & th, F f );
+//  void lw_thread_join( lw_thread_t th );
+
+
+#include <boost/config.hpp>
+#include <memory>
+#include <cerrno>
+
+#if defined( BOOST_HAS_PTHREADS )
+
+#include <pthread.h>
+
+namespace boost
+{
+namespace detail
+{
+
+typedef ::pthread_t lw_thread_t;
+
+inline int lw_thread_create_( lw_thread_t* thread, const pthread_attr_t* attr, void* (*start_routine)( void* ), void* arg )
+{
+    return ::pthread_create( thread, attr, start_routine, arg );
+}
+
+inline void lw_thread_join( lw_thread_t th )
+{
+    ::pthread_join( th, 0 );
+}
+
+} // namespace detail
+} // namespace boost
+
+#else // defined( BOOST_HAS_PTHREADS )
+
+#include <windows.h>
+#include <process.h>
+
+namespace boost
+{
+namespace detail
+{
+
+typedef HANDLE lw_thread_t;
+
+inline int lw_thread_create_( lw_thread_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 EAGAIN;
+    }
+}
+
+inline void lw_thread_join( lw_thread_t thread )
+{
+    ::WaitForSingleObject( thread, INFINITE );
+    ::CloseHandle( thread );
+}
+
+} // namespace detail
+} // namespace boost
+
+#endif // defined( BOOST_HAS_PTHREADS )
+
+
+namespace boost
+{
+namespace detail
+{
+
+class lw_abstract_thread
+{
+public:
+
+    virtual ~lw_abstract_thread() {}
+    virtual void run() = 0;
+};
+
+#if defined( BOOST_HAS_PTHREADS )
+
+extern "C" void * lw_thread_routine( void * pv )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#endif
+
+    pt->run();
+
+    return 0;
+}
+
+#else
+
+unsigned __stdcall lw_thread_routine( void * pv )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#endif
+
+    pt->run();
+
+    return 0;
+}
+
+#endif
+
+template<class F> class lw_thread_impl: public lw_abstract_thread
+{
+public:
+
+    explicit lw_thread_impl( F f ): f_( f )
+    {
+    }
+
+    void run()
+    {
+        f_();
+    }
+
+private:
+
+    F f_;
+};
+
+template<class F> int lw_thread_create( lw_thread_t & th, F f )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
+
+#endif
+
+    int r = lw_thread_create_( &th, 0, lw_thread_routine, p.get() );
+
+    if( r == 0 )
+    {
+        p.release();
+    }
+
+    return r;
+}
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED

include/boost/smart_ptr/detail/shared_count.hpp

@@ -22,28 +22,25 @@
 # 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/smart_ptr/bad_weak_ptr.hpp>
 #include <boost/smart_ptr/detail/sp_counted_base.hpp>
 #include <boost/smart_ptr/detail/sp_counted_impl.hpp>
 #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/core/addressof.hpp>
+#include <boost/config.hpp>
 #include <boost/config/workaround.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 <boost/cstdint.hpp>
+#include <memory>            // std::auto_ptr
+#include <functional>        // std::less
+#include <cstddef>           // std::size_t
 
 #ifdef BOOST_NO_EXCEPTIONS
 # include <new>              // std::bad_alloc
 #endif
 
-#include <boost/core/addressof.hpp>
-
 #if defined( BOOST_SP_DISABLE_DEPRECATED )
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
@@ -103,6 +100,14 @@ template< class D > struct sp_convert_reference< D& >
     typedef sp_reference_wrapper< D > type;
 };
 
+template<class T> std::size_t sp_hash_pointer( T* p ) BOOST_NOEXCEPT
+{
+    boost::uintptr_t v = reinterpret_cast<boost::uintptr_t>( p );
+
+    // match boost::hash<T*>
+    return static_cast<std::size_t>( v + ( v >> 3 ) );
+}
+
 class weak_count;
 
 class shared_count
@@ -517,6 +522,11 @@ public:
     {
         return pi_? pi_->get_untyped_deleter(): 0;
     }
+
+    std::size_t hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return sp_hash_pointer( pi_ );
+    }
 };
 
 
@@ -643,6 +653,11 @@ public:
     {
         return std::less<sp_counted_base *>()( pi_, r.pi_ );
     }
+
+    std::size_t hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return sp_hash_pointer( pi_ );
+    }
 };
 
 inline shared_count::shared_count( weak_count const & r ): pi_( r.pi_ )

include/boost/smart_ptr/detail/sp_counted_base.hpp

@@ -17,14 +17,9 @@
 // http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
-
-#if !defined( __c2__ ) && defined( __clang__ ) && defined( __has_extension )
-# if __has_extension( __c_atomic__ )
-#   define BOOST_SP_HAS_CLANG_C11_ATOMICS
-# endif
-#endif
 
 #if defined( BOOST_SP_DISABLE_THREADS )
 # include <boost/smart_ptr/detail/sp_counted_base_nt.hpp>
@@ -41,18 +36,24 @@
 #elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
 # include <boost/smart_ptr/detail/sp_counted_base_nt.hpp>
 
-#elif defined( BOOST_SP_HAS_CLANG_C11_ATOMICS )
-# include <boost/smart_ptr/detail/sp_counted_base_clang.hpp>
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+# include <boost/smart_ptr/detail/sp_counted_base_gcc_atomic.hpp>
 
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 # include <boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp>
 
-#elif defined( __SNC__ )
-# include <boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp>
+#elif defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 )
+# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
 
 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined(__PATHSCALE__)
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp>
 
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
+# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
+
+#elif defined( __SNC__ )
+# include <boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp>
+
 #elif defined(__HP_aCC) && defined(__ia64)
 # include <boost/smart_ptr/detail/sp_counted_base_acc_ia64.hpp>
 
@@ -71,9 +72,6 @@
 #elif defined( __GNUC__ ) && ( defined( __mips__ ) || defined( _mips ) ) && !defined(__PATHSCALE__) && !defined( __mips16 )
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
-# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
-
 #elif defined(__GNUC__) && ( defined( __sparcv9 ) || ( defined( __sparcv8 ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 402 ) ) )
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp>
 
@@ -91,6 +89,4 @@
 
 #endif
 
-#undef BOOST_SP_HAS_CLANG_C11_ATOMICS
-
 #endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_acc_ia64.hpp

@@ -16,9 +16,19 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <machine/sys/inline.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using HP aCC++/HP-UX/IA64 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_aix.hpp

@@ -25,6 +25,13 @@
 #include <builtins.h>
 #include <sys/atomic_op.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using AIX sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_clang.hpp

@@ -1,161 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//  detail/sp_counted_base_clang.hpp - __c11 clang intrinsics
-//
-//  Copyright (c) 2007, 2013, 2015 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/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/smart_ptr/detail/sp_noexcept.hpp>
-#include <boost/config.hpp>
-#include <boost/cstdint.hpp>
-
-namespace boost
-{
-
-namespace detail
-{
-
-#if defined(__clang__)
-# pragma clang diagnostic push
-#endif
-
-#if defined(__clang__) && defined(__has_warning)
-# if __has_warning( "-Wc11-extensions" )
-#  pragma clang diagnostic ignored "-Wc11-extensions"
-# endif
-#endif
-
-typedef _Atomic( boost::int_least32_t ) atomic_int_least32_t;
-
-inline void atomic_increment( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    __c11_atomic_fetch_add( pw, 1, __ATOMIC_RELAXED );
-}
-
-inline boost::int_least32_t atomic_decrement( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    return __c11_atomic_fetch_sub( pw, 1, __ATOMIC_ACQ_REL );
-}
-
-inline boost::int_least32_t atomic_conditional_increment( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    // long r = *pw;
-    // if( r != 0 ) ++*pw;
-    // return r;
-
-    boost::int_least32_t r = __c11_atomic_load( pw, __ATOMIC_RELAXED );
-
-    for( ;; )
-    {
-        if( r == 0 )
-        {
-            return r;
-        }
-
-        if( __c11_atomic_compare_exchange_weak( pw, &r, r + 1, __ATOMIC_RELAXED, __ATOMIC_RELAXED ) )
-        {
-            return r;
-        }
-    }    
-}
-
-#if defined(__clang__)
-# pragma clang diagnostic ignored "-Wweak-vtables"
-#endif
-
-class BOOST_SYMBOL_VISIBLE sp_counted_base
-{
-private:
-
-    sp_counted_base( sp_counted_base const & );
-    sp_counted_base & operator= ( sp_counted_base const & );
-
-    atomic_int_least32_t use_count_;    // #shared
-    atomic_int_least32_t weak_count_;   // #weak + (#shared != 0)
-
-public:
-
-    sp_counted_base() BOOST_SP_NOEXCEPT
-    {
-        __c11_atomic_init( &use_count_, 1 );
-        __c11_atomic_init( &weak_count_, 1 );
-    }
-
-    virtual ~sp_counted_base() /*BOOST_SP_NOEXCEPT*/
-    {
-    }
-
-    // dispose() is called when use_count_ drops to zero, to release
-    // the resources managed by *this.
-
-    virtual void dispose() BOOST_SP_NOEXCEPT = 0; // nothrow
-
-    // destroy() is called when weak_count_ drops to zero.
-
-    virtual void destroy() BOOST_SP_NOEXCEPT // nothrow
-    {
-        delete this;
-    }
-
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT = 0;
-
-    void add_ref_copy() BOOST_SP_NOEXCEPT
-    {
-        atomic_increment( &use_count_ );
-    }
-
-    bool add_ref_lock() BOOST_SP_NOEXCEPT // true on success
-    {
-        return atomic_conditional_increment( &use_count_ ) != 0;
-    }
-
-    void release() BOOST_SP_NOEXCEPT
-    {
-        if( atomic_decrement( &use_count_ ) == 1 )
-        {
-            dispose();
-            weak_release();
-        }
-    }
-
-    void weak_add_ref() BOOST_SP_NOEXCEPT
-    {
-        atomic_increment( &weak_count_ );
-    }
-
-    void weak_release() BOOST_SP_NOEXCEPT
-    {
-        if( atomic_decrement( &weak_count_ ) == 1 )
-        {
-            destroy();
-        }
-    }
-
-    long use_count() const BOOST_SP_NOEXCEPT
-    {
-        return __c11_atomic_load( const_cast< atomic_int_least32_t* >( &use_count_ ), __ATOMIC_ACQUIRE );
-    }
-};
-
-#if defined(__clang__)
-# pragma clang diagnostic pop
-#endif
-
-} // namespace detail
-
-} // namespace boost
-
-#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using CodeWarrior/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_cw_x86.hpp

@@ -1,161 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
-#define BOOST_SMART_PTR_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/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/config.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 BOOST_SYMBOL_VISIBLE 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;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_untyped_deleter() = 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_SMART_PTR_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_gcc_atomic.hpp

@@ -0,0 +1,148 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_ATOMIC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// detail/sp_counted_base_gcc_atomic.hpp - g++ 4.7+ __atomic intrinsics
+//
+// Copyright 2007, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/config.hpp>
+#include <boost/cstdint.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic sp_counted_base")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( boost::uint_least32_t * pw )
+{
+    __atomic_fetch_add( pw, 1, __ATOMIC_RELAXED );
+}
+
+inline boost::uint_least32_t atomic_decrement( boost::uint_least32_t * pw )
+{
+    return __atomic_fetch_sub( pw, 1, __ATOMIC_ACQ_REL );
+}
+
+inline boost::uint_least32_t atomic_conditional_increment( boost::uint_least32_t * pw )
+{
+    // long r = *pw;
+    // if( r != 0 ) ++*pw;
+    // return r;
+
+    boost::uint_least32_t r = __atomic_load_n( pw, __ATOMIC_RELAXED );
+
+    for( ;; )
+    {
+        if( r == 0 )
+        {
+            return r;
+        }
+
+        if( __atomic_compare_exchange_n( pw, &r, r + 1, true, __ATOMIC_RELAXED, __ATOMIC_RELAXED ) )
+        {
+            return r;
+        }
+    }
+}
+
+inline boost::uint_least32_t atomic_load( boost::uint_least32_t const * pw )
+{
+    return __atomic_load_n( pw, __ATOMIC_ACQUIRE );
+}
+
+class BOOST_SYMBOL_VISIBLE sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    boost::uint_least32_t use_count_;        // #shared
+    boost::uint_least32_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;
+    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
+    virtual void * get_untyped_deleter() = 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 atomic_load( &use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SYNC_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp

@@ -17,8 +17,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/IA64 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp

@@ -21,8 +21,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/MIPS sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_ppc.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp

@@ -20,9 +20,19 @@
 //  Thanks to Michael van der Westhuizen
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <inttypes.h> // int32_t
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/Sparc sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/x86 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_nt.hpp

@@ -23,6 +23,13 @@
 #include <boost/config.hpp>
 #include <boost/cstdint.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded, non-atomic sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_pt.hpp

@@ -24,6 +24,13 @@
 #include <boost/cstdint.hpp>
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp

@@ -6,7 +6,7 @@
 # pragma once
 #endif
 
-//  detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+
+//  detail/sp_counted_base_gcc_snc_ps3.hpp - PS3 Cell
 //
 //  Copyright (c) 2006 Piotr Wyderski
 //  Copyright (c) 2006 Tomas Puverle
@@ -20,9 +20,19 @@
 //  Thanks to Michael van der Westhuizen
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <inttypes.h> // uint32_t
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using PS3 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_solaris.hpp

@@ -1,116 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
-#define BOOST_SMART_PTR_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/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/config.hpp>
-#include <atomic.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class BOOST_SYMBOL_VISIBLE 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;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_untyped_deleter() = 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_SMART_PTR_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_spin.hpp

@@ -22,6 +22,13 @@
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using spinlock-based sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp

@@ -21,6 +21,13 @@
 #include <atomic>
 #include <cstdint>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_sync.hpp

@@ -23,6 +23,13 @@
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_vacpp_ppc.hpp

@@ -22,8 +22,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using xlC/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 extern "builtin" void __lwsync(void);
 extern "builtin" void __isync(void);
 extern "builtin" int __fetch_and_add(volatile int* addr, int val);

include/boost/smart_ptr/detail/sp_counted_base_w32.hpp

@@ -29,6 +29,13 @@
 #include <boost/config/workaround.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_impl.hpp

@@ -18,25 +18,21 @@
 // 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/smart_ptr/detail/sp_counted_base.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
 #include <boost/core/addressof.hpp>
+#include <boost/config.hpp>
 
 #if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 #include <boost/smart_ptr/detail/quick_allocator.hpp>
 #endif
 
-#if defined(BOOST_SP_USE_STD_ALLOCATOR)
-#include <memory>           // std::allocator
-#endif
-
+#include <memory>           // std::allocator, std::allocator_traits
 #include <cstddef>          // std::size_t
 
 namespace boost

include/boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp

@@ -0,0 +1,27 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+
+// boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp
+//
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// Defines the BOOST_SP_HAS_GCC_INTRINSICS macro if the __atomic_*
+// intrinsics are available.
+
+
+#if defined( __ATOMIC_RELAXED ) && defined( __ATOMIC_ACQUIRE ) && defined( __ATOMIC_RELEASE ) && defined( __ATOMIC_ACQ_REL )
+
+# define BOOST_SP_HAS_GCC_INTRINSICS
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_has_sync.hpp

@@ -1,69 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//
-//  boost/smart_ptr/detail/sp_has_sync.hpp
-//
-//  Copyright (c) 2008, 2009 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)
-//
-//  Defines the BOOST_SP_HAS_SYNC macro if the __sync_* intrinsics
-//  are available.
-//
-
-#ifndef BOOST_SP_NO_SYNC
-
-#if !defined( __c2__ ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 )
-
-# define BOOST_SP_HAS_SYNC
-
-#elif defined( __IBMCPP__ ) && ( __IBMCPP__ >= 1210 ) && !defined( __COMPILER_VER__ )
-
-# define BOOST_SP_HAS_SYNC
-
-#elif !defined( __c2__ ) && defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )
-
-#define BOOST_SP_HAS_SYNC
-
-#if defined( __arm__ )  || defined( __armel__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __hppa ) || defined( __hppa__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __m68k__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __sh__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __sparc__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __INTEL_COMPILER ) && !defined( __ia64__ ) && ( __INTEL_COMPILER < 1110 )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined(__PATHSCALE__) && ((__PATHCC__ == 4) && (__PATHCC_MINOR__ < 9)) 
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#endif
-
-#endif // #ifndef BOOST_SP_NO_SYNC
-
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp

@@ -0,0 +1,69 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp
+//
+//  Copyright (c) 2008, 2009 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)
+//
+//  Defines the BOOST_SP_HAS_SYNC_INTRINSICS macro if the __sync_* intrinsics
+//  are available.
+//
+
+#if !defined( BOOST_SP_NO_SYNC_INTRINSICS ) && !defined( BOOST_SP_NO_SYNC )
+
+#if defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 ) && !defined( __c2__ )
+
+# define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#elif defined( __IBMCPP__ ) && ( __IBMCPP__ >= 1210 ) && !defined( __COMPILER_VER__ )
+
+# define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __c2__ )
+
+#define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#if defined( __arm__ )  || defined( __armel__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __hppa ) || defined( __hppa__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __m68k__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __sh__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __sparc__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __INTEL_COMPILER ) && !defined( __ia64__ ) && ( __INTEL_COMPILER < 1110 )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined(__PATHSCALE__) && ((__PATHCC__ == 4) && (__PATHCC_MINOR__ < 9)) 
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#endif
+
+#endif // #if !defined( BOOST_SP_NO_SYNC_INTRINSICS ) && !defined( BOOST_SP_NO_SYNC )
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_obsolete.hpp

@@ -0,0 +1,32 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+
+// boost/smart_ptr/detail/sp_obsolete.hpp
+//
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// Defines the BOOST_SP_OBSOLETE macro that emits a deprecation
+// message.
+
+#include <boost/config/pragma_message.hpp>
+
+#if !defined( BOOST_SP_NO_OBSOLETE_MESSAGE )
+
+#define BOOST_SP_OBSOLETE() BOOST_PRAGMA_MESSAGE("This platform-specific implementation is presumed obsolete and is slated for removal. If you want it retained, please open an issue in https://github.com/boostorg/smart_ptr.")
+
+#else
+
+#define BOOST_SP_OBSOLETE()
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_pause.hpp

@@ -0,0 +1,51 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_pause.hpp
+//
+// inline void bost::detail::sp_thread_pause();
+//
+//   Emits a "pause" instruction.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__)
+
+extern "C" void _mm_pause();
+
+#define BOOST_SP_PAUSE _mm_pause();
+
+#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
+
+#define BOOST_SP_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
+
+#else
+
+#define BOOST_SP_PAUSE
+
+#endif
+
+namespace boost
+{
+namespace detail
+{
+
+inline void sp_thread_pause()
+{
+    BOOST_SP_PAUSE
+}
+
+} // namespace detail
+} // namespace boost
+
+#undef BOOST_SP_PAUSE
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_sleep.hpp

@@ -0,0 +1,104 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_sleep.hpp
+//
+// inline void bost::detail::sp_thread_sleep();
+//
+//   Cease execution for a while to yield to other threads,
+//   as if by calling nanosleep() with an appropriate interval.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using Sleep(1) in sp_thread_sleep")
+#endif
+
+#include <boost/smart_ptr/detail/sp_win32_sleep.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    Sleep( 1 );
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined(BOOST_HAS_NANOSLEEP)
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using nanosleep() in sp_thread_sleep")
+#endif
+
+#include <time.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    // 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
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sp_thread_yield() in sp_thread_sleep")
+#endif
+
+#include <boost/smart_ptr/detail/sp_thread_yield.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    sp_thread_yield();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_yield.hpp

@@ -0,0 +1,100 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_yield.hpp
+//
+// inline void bost::detail::sp_thread_yield();
+//
+//   Gives up the remainder of the time slice,
+//   as if by calling sched_yield().
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using Sleep(0) in sp_thread_yield")
+#endif
+
+#include <boost/smart_ptr/detail/sp_win32_sleep.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    Sleep( 0 );
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined(BOOST_HAS_SCHED_YIELD)
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sched_yield() in sp_thread_yield")
+#endif
+
+#ifndef _AIX
+# include <sched.h>
+#else
+  // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var
+  extern "C" int sched_yield(void);
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    sched_yield();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#else
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sp_thread_pause() in sp_thread_yield")
+#endif
+
+#include <boost/smart_ptr/detail/sp_thread_pause.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    sp_thread_pause();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_win32_sleep.hpp

@@ -0,0 +1,49 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_win32_sleep.hpp
+//
+// Declares the Win32 Sleep() function.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined( BOOST_USE_WINDOWS_H )
+# include <windows.h>
+#endif
+
+namespace boost
+{
+namespace detail
+{
+
+#if !defined( BOOST_USE_WINDOWS_H )
+
+#if defined(__clang__) && defined(__x86_64__)
+// clang x64 warns that __stdcall is ignored
+# define BOOST_SP_STDCALL
+#else
+# define BOOST_SP_STDCALL __stdcall
+#endif
+
+#if defined(__LP64__) // Cygwin 64
+  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned int ms );
+#else
+  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned long ms );
+#endif
+
+#undef BOOST_SP_STDCALL
+
+#endif // !defined( BOOST_USE_WINDOWS_H )
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED

include/boost/smart_ptr/detail/spinlock.hpp

@@ -28,28 +28,26 @@
 //  #define BOOST_DETAIL_SPINLOCK_INIT <unspecified>
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( BOOST_SP_USE_STD_ATOMIC )
-# if !defined( __clang__ )
-#   include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
-# else
-//  Clang (at least up to 3.4) can't compile spinlock_pool when
-//  using std::atomic, so substitute the __sync implementation instead.
-#   include <boost/smart_ptr/detail/spinlock_sync.hpp>
-# endif
+#  include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
 
 #elif defined( BOOST_SP_USE_PTHREADS )
 #  include <boost/smart_ptr/detail/spinlock_pt.hpp>
 
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+#  include <boost/smart_ptr/detail/spinlock_gcc_atomic.hpp>
+
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 #  include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
 
 #elif defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
 #  include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
 #  include <boost/smart_ptr/detail/spinlock_sync.hpp>
 
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)

include/boost/smart_ptr/detail/spinlock_gcc_arm.hpp

@@ -11,6 +11,13 @@
 
 #include <boost/smart_ptr/detail/yield_k.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/ARM spinlock")
+
+#endif
+
 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__)
 
 # define BOOST_SP_ARM_BARRIER "dmb"

include/boost/smart_ptr/detail/spinlock_gcc_atomic.hpp

@@ -0,0 +1,85 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/detail/yield_k.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic spinlock")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    unsigned char v_;
+
+public:
+
+    bool try_lock()
+    {
+        return __atomic_test_and_set( &v_, __ATOMIC_ACQUIRE ) == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        __atomic_clear( &v_, __ATOMIC_RELEASE );
+    }
+
+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_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED

include/boost/smart_ptr/detail/spinlock_nt.hpp

@@ -17,6 +17,13 @@
 
 #include <boost/assert.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded spinlock emulation")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_pt.hpp

@@ -17,6 +17,13 @@
 
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex spinlock emulation")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_std_atomic.hpp

@@ -19,6 +19,13 @@
 #include <boost/config.hpp>
 #include <atomic>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic spinlock")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_sync.hpp

@@ -21,6 +21,13 @@
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync spinlock")
+
+#endif
+
 namespace boost
 {
 
@@ -31,7 +38,7 @@ class spinlock
 {
 public:
 
-    int v_;
+    unsigned char v_;
 
 public:
 

include/boost/smart_ptr/detail/spinlock_w32.hpp

@@ -18,6 +18,13 @@
 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
 #include <boost/smart_ptr/detail/yield_k.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 spinlock")
+
+#endif
+
 // BOOST_COMPILER_FENCE
 
 #if defined(__INTEL_COMPILER)

include/boost/smart_ptr/detail/yield_k.hpp

@@ -7,107 +7,22 @@
 # pragma once
 #endif
 
+// boost/smart_ptr/detail/yield_k.hpp
 //
-//  yield_k.hpp
+// Copyright 2008, 2020 Peter Dimov
 //
-//  Copyright (c) 2008 Peter Dimov
+// inline void boost::detail::yield( unsigned k );
 //
-//  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
+//   Typical use:
+//   for( unsigned k = 0; !try_lock(); ++k ) yield( k );
 //
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
 
+#include <boost/smart_ptr/detail/sp_thread_pause.hpp>
+#include <boost/smart_ptr/detail/sp_thread_sleep.hpp>
 #include <boost/config.hpp>
 
-// BOOST_SMT_PAUSE
-
-#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__)
-
-extern "C" void _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 )
-
-#if defined(__clang__) && defined(__x86_64__)
-// clang x64 warns that __stdcall is ignored
-# define BOOST_SP_STDCALL
-#else
-# define BOOST_SP_STDCALL __stdcall
-#endif
-
-#if defined(__LP64__) // Cygwin 64
-  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned int ms );
-#else
-  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned long ms );
-#endif
-
-#undef BOOST_SP_STDCALL
-
-#endif // !defined( BOOST_USE_WINDOWS_H )
-
-inline void yield( unsigned k ) BOOST_NOEXCEPT
-{
-    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 )
-
-#ifndef _AIX
-#include <sched.h>
-#else
-   // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var
-       extern "C" int sched_yield(void);
-#endif
-
-#include <time.h>
-
 namespace boost
 {
 
@@ -116,31 +31,16 @@ namespace detail
 
 inline void yield( unsigned k )
 {
-    if( k < 4 )
+    // Experiments on Windows and Fedora 32 show that a single pause,
+    // followed by an immediate sp_thread_sleep(), is best.
+
+    if( k == 0 )
     {
-    }
-#if defined( BOOST_SMT_PAUSE )
-    else if( k < 16 )
-    {
-        BOOST_SMT_PAUSE
-    }
-#endif
-    else if( k < 32 || k & 1 )
-    {
-        sched_yield();
+        sp_thread_pause();
     }
     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 );
+        sp_thread_sleep();
     }
 }
 
@@ -148,22 +48,4 @@ inline void yield( unsigned k )
 
 } // namespace boost
 
-#else
-
-namespace boost
-{
-
-namespace detail
-{
-
-inline void yield( unsigned )
-{
-}
-
-} // namespace detail
-
-} // namespace boost
-
-#endif
-
 #endif // #ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED

include/boost/smart_ptr/intrusive_ptr.hpp

@@ -385,4 +385,23 @@ template< class T > std::size_t hash_value( boost::intrusive_ptr<T> const & p )
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::intrusive_ptr<T> >
+{
+    std::size_t operator()( ::boost::intrusive_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< T* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #endif  // #ifndef BOOST_SMART_PTR_INTRUSIVE_PTR_HPP_INCLUDED

include/boost/smart_ptr/local_shared_ptr.hpp

@@ -688,4 +688,23 @@ template< class T > std::size_t hash_value( local_shared_ptr<T> const & p ) BOOS
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::local_shared_ptr<T> >
+{
+    std::size_t operator()( ::boost::local_shared_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< typename ::boost::local_shared_ptr<T>::element_type* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #endif  // #ifndef BOOST_SMART_PTR_LOCAL_SHARED_PTR_HPP_INCLUDED

include/boost/smart_ptr/owner_hash.hpp

@@ -0,0 +1,27 @@
+#ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
+#define BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
+
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <cstddef>
+
+namespace boost
+{
+
+template<class T> struct owner_hash
+{
+    typedef std::size_t result_type;
+    typedef T argument_type;
+
+    std::size_t operator()( T const & t ) const BOOST_NOEXCEPT
+    {
+        return t.owner_hash_value();
+    }
+};
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED

include/boost/smart_ptr/shared_ptr.hpp

@@ -14,23 +14,16 @@
 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
 //
 
-#include <boost/config.hpp>   // for broken compiler workarounds
-
-// 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/smart_ptr/detail/shared_count.hpp>
-#include <boost/config/workaround.hpp>
 #include <boost/smart_ptr/detail/sp_convertible.hpp>
 #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
 #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
 
 #if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
@@ -40,6 +33,7 @@
 #include <functional>           // for std::less
 #include <typeinfo>             // for std::bad_cast
 #include <cstddef>              // for std::size_t
+#include <memory>               // for std::auto_ptr
 
 #if !defined(BOOST_NO_IOSTREAM)
 #if !defined(BOOST_NO_IOSFWD)
@@ -787,6 +781,11 @@ public:
         return pn == rhs.pn;
     }
 
+    std::size_t owner_hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return pn.hash_value();
+    }
+
     void * _internal_get_deleter( boost::detail::sp_typeinfo_ const & ti ) const BOOST_SP_NOEXCEPT
     {
         return pn.get_deleter( ti );
@@ -1165,6 +1164,25 @@ template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p ) BOO
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::shared_ptr<T> >
+{
+    std::size_t operator()( ::boost::shared_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< typename ::boost::shared_ptr<T>::element_type* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #include <boost/smart_ptr/detail/local_sp_deleter.hpp>
 
 namespace boost

include/boost/smart_ptr/weak_ptr.hpp

@@ -13,10 +13,11 @@
 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
 //
 
-#include <memory> // boost.TR1 include order fix
 #include <boost/smart_ptr/detail/shared_count.hpp>
 #include <boost/smart_ptr/shared_ptr.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <memory>
+#include <cstddef>
 
 namespace boost
 {
@@ -247,6 +248,11 @@ public:
         return pn == rhs.pn;
     }
 
+    std::size_t owner_hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return pn.hash_value();
+    }
+
 // Tasteless as this may seem, making all members public allows member templates
 // to work in the absence of member template friends. (Matthew Langston)
 
@@ -280,6 +286,40 @@ template<class T> weak_ptr( shared_ptr<T> ) -> weak_ptr<T>;
 
 #endif
 
+// hash_value
+
+template< class T > std::size_t hash_value( boost::weak_ptr<T> const & p ) BOOST_SP_NOEXCEPT
+{
+    return p.owner_hash_value();
+}
+
 } // namespace boost
 
+// std::hash, std::equal_to
+
+namespace std
+{
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+template<class T> struct hash< ::boost::weak_ptr<T> >
+{
+    std::size_t operator()( ::boost::weak_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return p.owner_hash_value();
+    }
+};
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+template<class T> struct equal_to< ::boost::weak_ptr<T> >
+{
+    bool operator()( ::boost::weak_ptr<T> const & a, ::boost::weak_ptr<T> const & b ) const BOOST_SP_NOEXCEPT
+    {
+        return a.owner_equals( b );
+    }
+};
+
+} // namespace std
+
 #endif  // #ifndef BOOST_SMART_PTR_WEAK_PTR_HPP_INCLUDED

test/CMakeLists.txt

@@ -10,6 +10,6 @@ if(HAVE_BOOST_TEST)
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads)
 
-boost_test_jamfile(FILE Jamfile LINK_LIBRARIES Boost::smart_ptr Boost::core Boost::align Boost::atomic Boost::container_hash Threads::Threads)
+boost_test_jamfile(FILE Jamfile LINK_LIBRARIES Boost::smart_ptr Boost::core Boost::align Boost::atomic Boost::container_hash Boost::bind Threads::Threads)
 
 endif()

test/Jamfile

@@ -376,3 +376,35 @@ run owner_equal_to_test.cpp ;
 run owner_equal_to_test2.cpp ;
 
 run owner_less_test2.cpp ;
+
+run ip_hash_test2.cpp ;
+run sp_hash_test4.cpp ;
+run lsp_hash_test.cpp ;
+run lsp_hash_test2.cpp ;
+
+run atomic_count_mt_test.cpp
+  : : : <threading>multi ;
+
+run spinlock_mt_test.cpp
+  : : : <threading>multi ;
+
+run spinlock_pool_mt_test.cpp
+  : : : <threading>multi ;
+
+run shared_ptr_mt_test.cpp
+  : : : <threading>multi ;
+
+run weak_ptr_mt_test.cpp
+  : : : <threading>multi ;
+
+compile sp_report_implementation.cpp ;
+
+run sp_owner_hash_value_test.cpp ;
+
+run wp_hash_test.cpp ;
+run wp_hash_test2.cpp ;
+
+run wp_unordered_test.cpp ;
+
+run owner_hash_test.cpp ;
+run sp_unordered_test.cpp ;

test/atomic_count_mt_test.cpp

@@ -0,0 +1,40 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/smart_ptr/detail/atomic_count.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static boost::detail::atomic_count count( 0 );
+
+void f( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        ++count;
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( count, N * M );
+
+    return boost::report_errors();
+}

test/ip_hash_test2.cpp

@@ -0,0 +1,67 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/intrusive_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+class base
+{
+private:
+
+    int use_count_;
+
+    base(base const &);
+    base & operator=(base const &);
+
+protected:
+
+    base(): use_count_(0)
+    {
+    }
+
+    virtual ~base()
+    {
+    }
+
+public:
+
+    long use_count() const
+    {
+        return use_count_;
+    }
+
+    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;
+    }
+};
+
+struct X: public base
+{
+};
+
+int main()
+{
+    boost::intrusive_ptr<X> p1, p2( new X );
+
+    BOOST_TEST_EQ( std::hash< boost::intrusive_ptr<X> >()( p1 ), std::hash< X* >()( p1.get() ) );
+    BOOST_TEST_EQ( std::hash< boost::intrusive_ptr<X> >()( p2 ), std::hash< X* >()( p2.get() ) );
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/lsp_hash_test.cpp

@@ -0,0 +1,66 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/functional/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::hash< boost::local_shared_ptr<int> > hasher;
+
+        boost::local_shared_ptr<int> p1, p2( p1 ), p3( new int ), p4( p3 ), p5( new int );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    {
+        boost::hash< boost::local_shared_ptr<int[]> > hasher;
+
+        boost::local_shared_ptr<int[]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    {
+        boost::hash< boost::local_shared_ptr<int[1]> > hasher;
+
+        boost::local_shared_ptr<int[1]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    return boost::report_errors();
+}

test/lsp_hash_test2.cpp

@@ -0,0 +1,42 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+int main()
+{
+    {
+        boost::local_shared_ptr<int> p1, p2( new int );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::local_shared_ptr<int[]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::local_shared_ptr<int[1]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[1]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[1]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/owner_hash_test.cpp

@@ -0,0 +1,88 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/owner_hash.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+template<class T> std::size_t hash_( T const& t )
+{
+    return boost::owner_hash<T>()( t );
+}
+
+int main()
+{
+    boost::shared_ptr<int> p1( new int );
+    boost::shared_ptr<int> p2( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( p2 ) );
+
+    boost::shared_ptr<int> p3( new int );
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( p3 ) );
+
+    boost::shared_ptr<int> p4;
+    boost::shared_ptr<int> p5;
+
+    BOOST_TEST_EQ( hash_( p4 ), hash_( p5 ) );
+    BOOST_TEST_NE( hash_( p4 ), hash_( p3 ) );
+
+    boost::shared_ptr<int> p6( static_cast<int*>(0) );
+
+    BOOST_TEST_NE( hash_( p4 ), hash_( p6 ) );
+
+    boost::shared_ptr<void> p7( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( p7 ) );
+
+    boost::shared_ptr<void> p8;
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( p8 ) );
+    BOOST_TEST_EQ( hash_( p4 ), hash_( p8 ) );
+
+    boost::weak_ptr<int> q1( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( q1 ) );
+
+    boost::weak_ptr<int> q2( p1 );
+
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q2 ) );
+
+    boost::weak_ptr<int> q3( p3 );
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( q3 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q3 ) );
+
+    boost::weak_ptr<int> q4;
+
+    BOOST_TEST_EQ( hash_( p4 ), hash_( q4 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q4 ) );
+
+    boost::weak_ptr<void> q5;
+
+    BOOST_TEST_EQ( hash_( q4 ), hash_( q5 ) );
+
+    boost::weak_ptr<void> q7( p7 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( q7 ) );
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q7 ) );
+
+    p1.reset();
+    p2.reset();
+    p3.reset();
+    p7.reset();
+
+    BOOST_TEST( q1.expired() );
+    BOOST_TEST( q2.expired() );
+    BOOST_TEST( q3.expired() );
+    BOOST_TEST( q7.expired() );
+
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q2 ) );
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q7 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q3 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q4 ) );
+
+    return boost::report_errors();
+}

test/shared_ptr_mt_test.cpp

@@ -0,0 +1,46 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static boost::shared_ptr<int> sp( new int );
+
+void f( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        boost::shared_ptr<int> p1( sp );
+        boost::weak_ptr<int> p2( p1 );
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( sp.use_count(), 1 );
+
+    sp.reset();
+
+    BOOST_TEST_EQ( sp.use_count(), 0 );
+
+    return boost::report_errors();
+}

test/sp_hash_test4.cpp

@@ -0,0 +1,42 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+int main()
+{
+    {
+        boost::shared_ptr<int> p1, p2( new int );
+
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::shared_ptr<int[]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::shared_ptr<int[1]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[1]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[1]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/sp_owner_hash_value_test.cpp

@@ -0,0 +1,85 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::shared_ptr<int> p1( new int );
+        boost::shared_ptr<int> p2( p1 );
+
+        BOOST_TEST_EQ( p1.owner_hash_value(), p2.owner_hash_value() );
+
+        boost::shared_ptr<int> p3( new int );
+
+        BOOST_TEST_NE( p1.owner_hash_value(), p3.owner_hash_value() );
+
+        boost::shared_ptr<int> p4;
+        boost::shared_ptr<int> p5;
+
+        BOOST_TEST_EQ( p4.owner_hash_value(), p5.owner_hash_value() );
+        BOOST_TEST_NE( p4.owner_hash_value(), p3.owner_hash_value() );
+
+        boost::shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST_NE( p4.owner_hash_value(), p6.owner_hash_value() );
+
+        boost::shared_ptr<void> p7( p1 );
+
+        BOOST_TEST_EQ( p1.owner_hash_value(), p7.owner_hash_value() );
+
+        boost::shared_ptr<void> p8;
+
+        BOOST_TEST_NE( p1.owner_hash_value(), p8.owner_hash_value() );
+        BOOST_TEST_EQ( p4.owner_hash_value(), p8.owner_hash_value() );
+
+        boost::weak_ptr<int> q1( p1 );
+
+        BOOST_TEST_EQ( p1.owner_hash_value(), q1.owner_hash_value() );
+
+        boost::weak_ptr<int> q2( p1 );
+
+        BOOST_TEST_EQ( q1.owner_hash_value(), q2.owner_hash_value() );
+
+        boost::weak_ptr<int> q3( p3 );
+
+        BOOST_TEST_NE( p1.owner_hash_value(), q3.owner_hash_value() );
+        BOOST_TEST_NE( q1.owner_hash_value(), q3.owner_hash_value() );
+
+        boost::weak_ptr<int> q4;
+
+        BOOST_TEST_EQ( p4.owner_hash_value(), q4.owner_hash_value() );
+        BOOST_TEST_NE( q1.owner_hash_value(), q4.owner_hash_value() );
+
+        boost::weak_ptr<void> q5;
+
+        BOOST_TEST_EQ( q4.owner_hash_value(), q5.owner_hash_value() );
+
+        boost::weak_ptr<void> q7( p7 );
+
+        BOOST_TEST_EQ( p1.owner_hash_value(), q7.owner_hash_value() );
+        BOOST_TEST_EQ( q1.owner_hash_value(), q7.owner_hash_value() );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST_EQ( q1.owner_hash_value(), q2.owner_hash_value() );
+        BOOST_TEST_EQ( q1.owner_hash_value(), q7.owner_hash_value() );
+
+        BOOST_TEST_NE( q1.owner_hash_value(), q3.owner_hash_value() );
+        BOOST_TEST_NE( q1.owner_hash_value(), q4.owner_hash_value() );
+    }
+
+    return boost::report_errors();
+}

test/sp_report_implementation.cpp

@@ -0,0 +1,12 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#define BOOST_SP_REPORT_IMPLEMENTATION
+#include <boost/shared_ptr.hpp>
+#include <boost/smart_ptr/detail/spinlock.hpp>
+#include <boost/smart_ptr/detail/atomic_count.hpp>
+
+int main()
+{
+}

test/sp_unordered_test.cpp

@@ -0,0 +1,51 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/smart_ptr/owner_hash.hpp>
+#include <boost/smart_ptr/owner_equal_to.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+
+#if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+
+int main() {}
+
+#else
+
+#include <unordered_set>
+
+int main()
+{
+    std::unordered_set< boost::shared_ptr<void>, boost::owner_hash< boost::shared_ptr<void> >, boost::owner_equal_to< boost::shared_ptr<void> > > set;
+
+    boost::shared_ptr<int> p1( (int*)0 );
+    boost::shared_ptr<int> p2( p1 );
+    boost::shared_ptr<void> p3( p1 );
+
+    set.insert( p1 );
+    set.insert( p2 );
+    set.insert( p3 );
+
+    BOOST_TEST_EQ( set.size(), 1 );
+
+    boost::shared_ptr<int> p4( (int*)0 );
+
+    set.insert( p4 );
+
+    BOOST_TEST_EQ( set.size(), 2 );
+
+    BOOST_TEST_EQ( set.count( p1 ), 1 );
+    BOOST_TEST_EQ( set.count( p2 ), 1 );
+    BOOST_TEST_EQ( set.count( p3 ), 1 );
+    BOOST_TEST_EQ( set.count( p4 ), 1 );
+
+    boost::shared_ptr<int> p5( (int*)0 );
+
+    BOOST_TEST_EQ( set.count( p5 ), 0 );
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)

test/spinlock_mt_test.cpp

@@ -0,0 +1,42 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/smart_ptr/detail/spinlock.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static int count = 0;
+static boost::detail::spinlock sp = BOOST_DETAIL_SPINLOCK_INIT;
+
+void f( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        boost::detail::spinlock::scoped_lock lock( sp );
+        ++count;
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( count, N * M );
+
+    return boost::report_errors();
+}

test/spinlock_pool_mt_test.cpp

@@ -0,0 +1,41 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/smart_ptr/detail/spinlock_pool.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static int count = 0;
+
+void f( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        boost::detail::spinlock_pool<0>::scoped_lock lock( &count );
+        ++count;
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( count, N * M );
+
+    return boost::report_errors();
+}

test/weak_ptr_mt_test.cpp

@@ -0,0 +1,74 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static boost::shared_ptr<int> sp( new int );
+static boost::weak_ptr<int> wp( sp );
+
+void f1( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        boost::weak_ptr<int> p1( wp );
+
+        BOOST_TEST( !wp.expired() );
+        BOOST_TEST( wp.lock() != 0 );
+    }
+}
+
+void f2( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        boost::weak_ptr<int> p1( wp );
+
+        BOOST_TEST( wp.expired() );
+        BOOST_TEST( wp.lock() == 0 );
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f1, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( sp.use_count(), 1 );
+    BOOST_TEST_EQ( wp.use_count(), 1 );
+
+    sp.reset();
+
+    BOOST_TEST_EQ( sp.use_count(), 0 );
+    BOOST_TEST_EQ( wp.use_count(), 0 );
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f2, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    wp.reset();
+
+    return boost::report_errors();
+}

test/wp_hash_test.cpp

@@ -0,0 +1,76 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/weak_ptr.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/functional/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::hash< boost::weak_ptr<int> > hasher;
+
+        boost::shared_ptr<int> p1, p2( p1 ), p3( new int ), p4( p3 ), p5( new int );
+        boost::weak_ptr<int> q1( p1 ), q2( p2 ), q3( p3 ), q4( p4 ), q5( p5 );
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+
+        p3.reset();
+        p4.reset();
+        p5.reset();
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+    }
+
+    {
+        boost::hash< boost::weak_ptr<int[]> > hasher;
+
+        boost::shared_ptr<int[]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+        boost::weak_ptr<int[]> q1( p1 ), q2( p2 ), q3( p3 ), q4( p4 ), q5( p5 );
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+
+        p3.reset();
+        p4.reset();
+        p5.reset();
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+    }
+
+    {
+        boost::hash< boost::weak_ptr<int[1]> > hasher;
+
+        boost::shared_ptr<int[1]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+        boost::weak_ptr<int[1]> q1( p1 ), q2( p2 ), q3( p3 ), q4( p4 ), q5( p5 );
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+
+        p3.reset();
+        p4.reset();
+        p5.reset();
+
+        BOOST_TEST_EQ( hasher( q1 ), hasher( q2 ) );
+        BOOST_TEST_NE( hasher( q1 ), hasher( q3 ) );
+        BOOST_TEST_EQ( hasher( q3 ), hasher( q4 ) );
+        BOOST_TEST_NE( hasher( q3 ), hasher( q5 ) );
+    }
+
+    return boost::report_errors();
+}

test/wp_hash_test2.cpp

@@ -0,0 +1,61 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/weak_ptr.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+int main()
+{
+    {
+        boost::shared_ptr<int> p1, p2( new int );
+        boost::weak_ptr<int> q1( p1 ), q2( p2 ), q3;
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int> >()( q1 ), q1.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int> >()( q2 ), q2.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int> >()( q3 ), q3.owner_hash_value() );
+
+        p2.reset();
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int> >()( q2 ), q2.owner_hash_value() );
+    }
+
+    {
+        boost::shared_ptr<int[]> p1, p2( new int[1] );
+        boost::weak_ptr<int[]> q1( p1 ), q2( p2 ), q3;
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[]> >()( q1 ), q1.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[]> >()( q2 ), q2.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[]> >()( q3 ), q3.owner_hash_value() );
+
+        p2.reset();
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[]> >()( q2 ), q2.owner_hash_value() );
+    }
+
+    {
+        boost::shared_ptr<int[1]> p1, p2( new int[1] );
+        boost::weak_ptr<int[1]> q1( p1 ), q2( p2 ), q3;
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[1]> >()( q1 ), q1.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[1]> >()( q2 ), q2.owner_hash_value() );
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[1]> >()( q3 ), q3.owner_hash_value() );
+
+        p2.reset();
+
+        BOOST_TEST_EQ( std::hash< boost::weak_ptr<int[1]> >()( q2 ), q2.owner_hash_value() );
+    }
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/wp_unordered_test.cpp

@@ -0,0 +1,87 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/weak_ptr.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+
+#if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+
+int main() {}
+
+#else
+
+#include <unordered_set>
+
+int main()
+{
+    std::unordered_set< boost::weak_ptr<void> > set;
+
+    boost::shared_ptr<int> p1( (int*)0 );
+    boost::shared_ptr<int> p2( p1 );
+    boost::shared_ptr<void> p3( p1 );
+
+    set.insert( p1 );
+    set.insert( p2 );
+    set.insert( p3 );
+
+    BOOST_TEST_EQ( set.size(), 1 );
+
+    boost::weak_ptr<int> q1( p1 );
+    boost::weak_ptr<int> q2( p2 );
+    boost::weak_ptr<void> q3( p3 );
+    boost::weak_ptr<int> q4( q2 );
+    boost::weak_ptr<void> q5( q3 );
+
+    set.insert( q1 );
+    set.insert( q2 );
+    set.insert( q3 );
+    set.insert( q4 );
+    set.insert( q5 );
+
+    BOOST_TEST_EQ( set.size(), 1 );
+
+    boost::shared_ptr<int> p6( (int*)0 );
+
+    set.insert( p6 );
+
+    BOOST_TEST_EQ( set.size(), 2 );
+
+    boost::weak_ptr<int> q6( p6 );
+
+    set.insert( q6 );
+
+    BOOST_TEST_EQ( set.size(), 2 );
+
+    BOOST_TEST_EQ( set.count( q1 ), 1 );
+    BOOST_TEST_EQ( set.count( q2 ), 1 );
+    BOOST_TEST_EQ( set.count( q3 ), 1 );
+    BOOST_TEST_EQ( set.count( q4 ), 1 );
+    BOOST_TEST_EQ( set.count( q5 ), 1 );
+    BOOST_TEST_EQ( set.count( q6 ), 1 );
+
+    boost::shared_ptr<int> p7( (int*)0 );
+    boost::weak_ptr<int> q7( p7 );
+
+    BOOST_TEST_EQ( set.count( q7 ), 0 );
+
+    p1.reset();
+    p2.reset();
+    p3.reset();
+    p6.reset();
+    p7.reset();
+
+    BOOST_TEST_EQ( set.count( q1 ), 1 );
+    BOOST_TEST_EQ( set.count( q2 ), 1 );
+    BOOST_TEST_EQ( set.count( q3 ), 1 );
+    BOOST_TEST_EQ( set.count( q4 ), 1 );
+    BOOST_TEST_EQ( set.count( q5 ), 1 );
+    BOOST_TEST_EQ( set.count( q6 ), 1 );
+    BOOST_TEST_EQ( set.count( q7 ), 0 );
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)