From dad59f3325a8f17fe4fb2020139d8c14688efb9c Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Mon, 2 Mar 2009 16:42:28 +0000
Subject: [PATCH] Merge [51517] to release. Closes #2525.

[SVN r51538]
---
 .../boost/smart_ptr/detail/atomic_count.hpp   |  5 +-
 .../smart_ptr/detail/atomic_count_gcc.hpp     |  6 ++-
 .../smart_ptr/detail/sp_counted_base.hpp      |  5 +-
 .../boost/smart_ptr/detail/sp_has_sync.hpp    | 49 +++++++++++++++++++
 include/boost/smart_ptr/detail/spinlock.hpp   |  8 ++-
 5 files changed, 67 insertions(+), 6 deletions(-)
 create mode 100644 include/boost/smart_ptr/detail/sp_has_sync.hpp

diff --git a/include/boost/smart_ptr/detail/atomic_count.hpp b/include/boost/smart_ptr/detail/atomic_count.hpp
index 91236e4..a6ddea3 100644
--- a/include/boost/smart_ptr/detail/atomic_count.hpp
+++ b/include/boost/smart_ptr/detail/atomic_count.hpp
@@ -74,6 +74,7 @@
 //
 
 #include <boost/config.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #ifndef BOOST_HAS_THREADS
 
@@ -95,10 +96,10 @@ typedef long atomic_count;
 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) )
 #  include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
 
-#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
 #  include <boost/smart_ptr/detail/atomic_count_win32.hpp>
 
-#elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+#elif defined( BOOST_SP_HAS_SYNC )
 #  include <boost/smart_ptr/detail/atomic_count_sync.hpp>
 
 #elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
diff --git a/include/boost/smart_ptr/detail/atomic_count_gcc.hpp b/include/boost/smart_ptr/detail/atomic_count_gcc.hpp
index 6abfdf2..1305632 100644
--- a/include/boost/smart_ptr/detail/atomic_count_gcc.hpp
+++ b/include/boost/smart_ptr/detail/atomic_count_gcc.hpp
@@ -17,7 +17,11 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#include <bits/atomicity.h>
+#if __GNUC__ * 100 + __GNUC_MINOR__ >= 402
+# include <ext/atomicity.h> 
+#else 
+# include <bits/atomicity.h>
+#endif
 
 namespace boost
 {
diff --git a/include/boost/smart_ptr/detail/sp_counted_base.hpp b/include/boost/smart_ptr/detail/sp_counted_base.hpp
index 1352346..df8be5b 100644
--- a/include/boost/smart_ptr/detail/sp_counted_base.hpp
+++ b/include/boost/smart_ptr/detail/sp_counted_base.hpp
@@ -18,6 +18,7 @@
 //
 
 #include <boost/config.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( BOOST_SP_DISABLE_THREADS )
 # include <boost/smart_ptr/detail/sp_counted_base_nt.hpp>
@@ -46,13 +47,13 @@
 #elif defined( __GNUC__ ) && ( defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc ) )
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_ppc.hpp>
 
-#elif defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+#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>
 
-#elif defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ )
+#elif defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined(__CYGWIN__)
 # include <boost/smart_ptr/detail/sp_counted_base_w32.hpp>
 
 #elif !defined( BOOST_HAS_THREADS )
diff --git a/include/boost/smart_ptr/detail/sp_has_sync.hpp b/include/boost/smart_ptr/detail/sp_has_sync.hpp
new file mode 100644
index 0000000..cb0282d
--- /dev/null
+++ b/include/boost/smart_ptr/detail/sp_has_sync.hpp
@@ -0,0 +1,49 @@
+#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.
+//
+
+#if 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( __sparc__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#if defined( __INTEL_COMPILER ) && !defined( __ia64__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#endif // __GNUC__ * 100 + __GNUC_MINOR__ >= 401
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
diff --git a/include/boost/smart_ptr/detail/spinlock.hpp b/include/boost/smart_ptr/detail/spinlock.hpp
index 9c6cb9f..1640a38 100644
--- a/include/boost/smart_ptr/detail/spinlock.hpp
+++ b/include/boost/smart_ptr/detail/spinlock.hpp
@@ -29,17 +29,23 @@
 //
 
 #include <boost/config.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
 #  include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>
-#elif defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __arm__ ) && !defined( __hppa ) && ( !defined( __INTEL_COMPILER ) || defined( __ia64__ ) )
+
+#elif defined( BOOST_SP_HAS_SYNC )
 #  include <boost/smart_ptr/detail/spinlock_sync.hpp>
+
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
 #  include <boost/smart_ptr/detail/spinlock_w32.hpp>
+
 #elif defined(BOOST_HAS_PTHREADS)
 #  include <boost/smart_ptr/detail/spinlock_pt.hpp>
+
 #elif !defined(BOOST_HAS_THREADS)
 #  include <boost/smart_ptr/detail/spinlock_nt.hpp>
+
 #else
 #  error Unrecognized threading platform
 #endif