| #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED |
| #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED |
| |
| // boost/detail/atomic_count_gcc_atomic.hpp |
| // |
| // atomic_count for g++ 4.7+ |
| // |
| // Copyright 2007, 2020 Peter Dimov |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // https://www.boost.org/LICENSE_1_0.txt |
| |
| #include <boost/cstdint.hpp> |
| |
| #if defined(BOOST_SP_REPORT_IMPLEMENTATION) |
| |
| #include <boost/config/pragma_message.hpp> |
| BOOST_PRAGMA_MESSAGE("Using __atomic atomic_count") |
| |
| #endif |
| |
| namespace boost |
| { |
| |
| namespace detail |
| { |
| |
| class atomic_count |
| { |
| public: |
| |
| explicit atomic_count( long v ): value_( static_cast< boost::int_least32_t >( v ) ) |
| { |
| } |
| |
| long operator++() |
| { |
| return __atomic_add_fetch( &value_, +1, __ATOMIC_ACQ_REL ); |
| } |
| |
| long operator--() |
| { |
| return __atomic_add_fetch( &value_, -1, __ATOMIC_ACQ_REL ); |
| } |
| |
| operator long() const |
| { |
| return __atomic_load_n( &value_, __ATOMIC_ACQUIRE ); |
| } |
| |
| private: |
| |
| atomic_count(atomic_count const &); |
| atomic_count & operator=(atomic_count const &); |
| |
| boost::int_least32_t value_; |
| }; |
| |
| } // namespace detail |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED |