Chris@16: #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
Chris@16: #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
Chris@16: 
Chris@16: //
Chris@16: //  boost/detail/atomic_count_sync.hpp
Chris@16: //
Chris@16: //  atomic_count for g++ 4.1+
Chris@16: //
Chris@16: //  http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html
Chris@16: //
Chris@16: //  Copyright 2007 Peter Dimov
Chris@16: //
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See
Chris@16: //  accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: 
Chris@16: #if defined( __ia64__ ) && defined( __INTEL_COMPILER )
Chris@16: # include <ia64intrin.h>
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: class atomic_count
Chris@16: {
Chris@16: public:
Chris@16: 
Chris@16:     explicit atomic_count( long v ) : value_( v ) {}
Chris@16: 
Chris@16:     long operator++()
Chris@16:     {
Chris@16:         return __sync_add_and_fetch( &value_, 1 );
Chris@16:     }
Chris@16: 
Chris@16:     long operator--()
Chris@16:     {
Chris@16:         return __sync_add_and_fetch( &value_, -1 );
Chris@16:     }
Chris@16: 
Chris@16:     operator long() const
Chris@16:     {
Chris@16:         return __sync_fetch_and_add( &value_, 0 );
Chris@16:     }
Chris@16: 
Chris@16: private:
Chris@16: 
Chris@16:     atomic_count(atomic_count const &);
Chris@16:     atomic_count & operator=(atomic_count const &);
Chris@16: 
Chris@16:     mutable long value_;
Chris@16: };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED