Update of /cvsroot/boost/boost/boost/detail
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv27511/boost/detail
Modified Files:
atomic_count.hpp
Added Files:
atomic_count_sync.hpp
Log Message:
Use __sync intrinsics on g++ 4.1+
--- NEW FILE: atomic_count_sync.hpp ---
#ifndef BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
#define BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
//
// boost/detail/atomic_count_sync.hpp
//
// atomic_count for g++ 4.1+
//
// http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html
//
// Copyright 2007 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
namespace boost
{
namespace detail
{
class atomic_count
{
public:
explicit atomic_count( long v ) : value_( v ) {}
void operator++()
{
__sync_add_and_fetch( &value_, 1 );
}
long operator--()
{
return __sync_add_and_fetch( &value_, -1 );
}
operator long() const
{
return __sync_fetch_and_add( &value_, 0 );
}
private:
atomic_count(atomic_count const &);
atomic_count & operator=(atomic_count const &);
mutable long value_;
};
} // namespace detail
} // namespace boost
#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
Index: atomic_count.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/detail/atomic_count.hpp,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -d -r1.11 -r1.12
--- atomic_count.hpp 30 Mar 2005 22:52:54 -0000 1.11
+++ atomic_count.hpp 28 Apr 2007 16:15:13 -0000 1.12
@@ -93,6 +93,8 @@
# include <boost/detail/atomic_count_pthreads.hpp>
#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
# include <boost/detail/atomic_count_win32.hpp>
+#elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )
+# include <boost/detail/atomic_count_sync.hpp>
#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
# include <boost/detail/atomic_count_gcc.hpp>
#elif defined(BOOST_HAS_PTHREADS)
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