| // |
| // detail/gcc_sync_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 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 |