| #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_STD_ATOMIC_HPP_INCLUDED |
| #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_STD_ATOMIC_HPP_INCLUDED |
| |
| // |
| // boost/detail/atomic_count_std_atomic.hpp |
| // |
| // atomic_count for std::atomic |
| // |
| // Copyright 2013 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 |
| // |
| |
| #include <atomic> |
| #include <cstdint> |
| |
| namespace boost |
| { |
| |
| namespace detail |
| { |
| |
| class atomic_count |
| { |
| public: |
| |
| explicit atomic_count( long v ): value_( v ) |
| { |
| } |
| |
| long operator++() |
| { |
| return value_.fetch_add( 1, std::memory_order_acq_rel ) + 1; |
| } |
| |
| long operator--() |
| { |
| return value_.fetch_sub( 1, std::memory_order_acq_rel ) - 1; |
| } |
| |
| operator long() const |
| { |
| return value_.load( std::memory_order_acquire ); |
| } |
| |
| private: |
| |
| atomic_count(atomic_count const &); |
| atomic_count & operator=(atomic_count const &); |
| |
| std::atomic_int_least32_t value_; |
| }; |
| |
| } // namespace detail |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_STD_ATOMIC_HPP_INCLUDED |