#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED | |
#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED | |
// | |
// boost/detail/atomic_count_sync.hpp | |
// | |
// atomic_count for g++ 4.1+ | |
// | |
// http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html | |
// | |
// Copyright 2007 Peter Dimov | |
// | |
// Distributed under the Boost Software License, Version 1.0. (See | |
// accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
// | |
#if defined( __ia64__ ) && defined( __INTEL_COMPILER ) | |
# include <ia64intrin.h> | |
#endif | |
namespace boost | |
{ | |
namespace detail | |
{ | |
class atomic_count | |
{ | |
public: | |
explicit atomic_count( long v ) : value_( v ) {} | |
long operator++() | |
{ | |
return __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_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED |