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- #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
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