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Contents
#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
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14 entries across 14 versions & 1 rubygems