| // |
| // detail/win_fenced_block.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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/config.hpp" |
| |
| #if defined(ASIO_WINDOWS) && !defined(UNDER_CE) |
| |
| #include "asio/detail/socket_types.hpp" |
| #include "asio/detail/noncopyable.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| class win_fenced_block |
| : private noncopyable |
| { |
| public: |
| enum half_t { half }; |
| enum full_t { full }; |
| |
| // Constructor for a half fenced block. |
| explicit win_fenced_block(half_t) |
| { |
| } |
| |
| // Constructor for a full fenced block. |
| explicit win_fenced_block(full_t) |
| { |
| #if defined(__BORLANDC__) |
| LONG barrier = 0; |
| ::InterlockedExchange(&barrier, 1); |
| #elif defined(ASIO_MSVC) \ |
| && ((ASIO_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(ASIO_MSVC) \ |
| && ((ASIO_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 |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // defined(ASIO_WINDOWS) && !defined(UNDER_CE) |
| |
| #endif // ASIO_DETAIL_WIN_FENCED_BLOCK_HPP |