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//
// win_fenced_block.hpp
// ~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//
#ifndef ASIO_DETAIL_WIN_FENCED_BLOCK_HPP
#define ASIO_DETAIL_WIN_FENCED_BLOCK_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/detail/push_options.hpp"
#include <boost/config.hpp>
#include "asio/detail/pop_options.hpp"
#if defined(BOOST_WINDOWS) && !defined(UNDER_CE)
#include "asio/detail/socket_types.hpp"
namespace asio {
namespace detail {
class win_fenced_block
: private noncopyable
{
public:
// Constructor.
win_fenced_block()
{
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
# if defined(_M_IX86)
# pragma warning(push)
# pragma warning(disable:4793)
LONG barrier;
__asm { xchg barrier, eax }
# pragma warning(pop)
# endif // defined(_M_IX86)
#else // defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
MemoryBarrier();
#endif // defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
}
// Destructor.
~win_fenced_block()
{
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
# if defined(_M_IX86)
# pragma warning(push)
# pragma warning(disable:4793)
LONG barrier;
__asm { xchg barrier, eax }
# pragma warning(pop)
# endif // defined(_M_IX86)
#else // defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
MemoryBarrier();
#endif // defined(BOOST_MSVC) && (BOOST_MSVC < 1400)
}
};
} // namespace detail
} // namespace asio
#endif // defined(BOOST_WINDOWS) && !defined(UNDER_CE)
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_WIN_FENCED_BLOCK_HPP
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