// | |
// detail/win_fenced_block.hpp | |
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
// | |
// Copyright (c) 2003-2011 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 BOOST_ASIO_DETAIL_WIN_FENCED_BLOCK_HPP | |
#define BOOST_ASIO_DETAIL_WIN_FENCED_BLOCK_HPP | |
#if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
# pragma once | |
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
#include <boost/asio/detail/config.hpp> | |
#if defined(BOOST_WINDOWS) && !defined(UNDER_CE) | |
#include <boost/asio/detail/socket_types.hpp> | |
#include <boost/asio/detail/push_options.hpp> | |
namespace boost { | |
namespace asio { | |
namespace detail { | |
class win_fenced_block | |
: private noncopyable | |
{ | |
public: | |
// Constructor. | |
win_fenced_block() | |
{ | |
#if defined(__BORLANDC__) | |
LONG barrier = 0; | |
::InterlockedExchange(&barrier, 1); | |
#elif defined(BOOST_MSVC) && ((BOOST_MSVC < 1400) || !defined(MemoryBarrier)) | |
# 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 | |
MemoryBarrier(); | |
#endif | |
} | |
// Destructor. | |
~win_fenced_block() | |
{ | |
#if defined(__BORLANDC__) | |
LONG barrier = 0; | |
::InterlockedExchange(&barrier, 1); | |
#elif defined(BOOST_MSVC) && ((BOOST_MSVC < 1400) || !defined(MemoryBarrier)) | |
# 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 | |
MemoryBarrier(); | |
#endif | |
} | |
}; | |
} // namespace detail | |
} // namespace asio | |
} // namespace boost | |
#include <boost/asio/detail/pop_options.hpp> | |
#endif // defined(BOOST_WINDOWS) && !defined(UNDER_CE) | |
#endif // BOOST_ASIO_DETAIL_WIN_FENCED_BLOCK_HPP |