// | |
// detail/gcc_sync_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_GCC_SYNC_FENCED_BLOCK_HPP | |
#define BOOST_ASIO_DETAIL_GCC_SYNC_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(__GNUC__) \ | |
&& ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) \ | |
&& !defined(__INTEL_COMPILER) && !defined(__ICL) \ | |
&& !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) | |
#include <boost/asio/detail/push_options.hpp> | |
namespace boost { | |
namespace asio { | |
namespace detail { | |
class gcc_sync_fenced_block | |
: private noncopyable | |
{ | |
public: | |
// Constructor. | |
gcc_sync_fenced_block() | |
: value_(0) | |
{ | |
__sync_lock_test_and_set(&value_, 1); | |
} | |
// Destructor. | |
~gcc_sync_fenced_block() | |
{ | |
__sync_lock_release(&value_); | |
} | |
private: | |
int value_; | |
}; | |
} // namespace detail | |
} // namespace asio | |
} // namespace boost | |
#include <boost/asio/detail/pop_options.hpp> | |
#endif // defined(__GNUC__) | |
// && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) | |
// && !defined(__INTEL_COMPILER) && !defined(__ICL) | |
// && !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) | |
#endif // BOOST_ASIO_DETAIL_GCC_SYNC_FENCED_BLOCK_HPP |