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Contents
/*
* 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)
*
* Copyright (c) 2020 Andrey Semashev
*/
/*!
* \file atomic/detail/fence_ops_windows.hpp
*
* This header contains implementation of the \c fence_operations struct.
*/
#ifndef BOOST_ATOMIC_DETAIL_FENCE_OPS_WINDOWS_HPP_INCLUDED_
#define BOOST_ATOMIC_DETAIL_FENCE_OPS_WINDOWS_HPP_INCLUDED_
#include <boost/cstdint.hpp>
#include <boost/memory_order.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/interlocked.hpp>
#include <boost/atomic/detail/ops_msvc_common.hpp>
#include <boost/atomic/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
namespace atomics {
namespace detail {
//! Fence operations based on Windows-specific system calls or intrinsics
struct fence_operations_windows
{
static BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
{
if (order != memory_order_relaxed)
{
BOOST_ATOMIC_DETAIL_COMPILER_BARRIER();
if (order == memory_order_seq_cst)
hardware_full_fence();
BOOST_ATOMIC_DETAIL_COMPILER_BARRIER();
}
}
static BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
{
if (order != memory_order_relaxed)
BOOST_ATOMIC_DETAIL_COMPILER_BARRIER();
}
static BOOST_FORCEINLINE void hardware_full_fence() BOOST_NOEXCEPT
{
boost::uint32_t tmp;
BOOST_ATOMIC_INTERLOCKED_INCREMENT(&tmp);
}
};
typedef fence_operations_windows fence_operations;
} // namespace detail
} // namespace atomics
} // namespace boost
#include <boost/atomic/detail/footer.hpp>
#endif // BOOST_ATOMIC_DETAIL_FENCE_OPS_WINDOWS_HPP_INCLUDED_
Version data entries
13 entries across 13 versions & 1 rubygems