]>
Commit | Line | Data |
---|---|---|
1 | // | |
2 | // detail/gcc_sync_fenced_block.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef BOOST_ASIO_DETAIL_GCC_SYNC_FENCED_BLOCK_HPP | |
12 | #define BOOST_ASIO_DETAIL_GCC_SYNC_FENCED_BLOCK_HPP | |
13 | ||
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
15 | # pragma once | |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
17 | ||
18 | #include <boost/asio/detail/config.hpp> | |
19 | ||
20 | #if defined(__GNUC__) \ | |
21 | && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) \ | |
22 | && !defined(__INTEL_COMPILER) && !defined(__ICL) \ | |
23 | && !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) | |
24 | ||
25 | #include <boost/asio/detail/push_options.hpp> | |
26 | ||
27 | namespace boost { | |
28 | namespace asio { | |
29 | namespace detail { | |
30 | ||
31 | class gcc_sync_fenced_block | |
32 | : private noncopyable | |
33 | { | |
34 | public: | |
35 | enum half_or_full_t { half, full }; | |
36 | ||
37 | // Constructor. | |
38 | explicit gcc_sync_fenced_block(half_or_full_t) | |
39 | : value_(0) | |
40 | { | |
41 | __sync_lock_test_and_set(&value_, 1); | |
42 | } | |
43 | ||
44 | // Destructor. | |
45 | ~gcc_sync_fenced_block() | |
46 | { | |
47 | __sync_lock_release(&value_); | |
48 | } | |
49 | ||
50 | private: | |
51 | int value_; | |
52 | }; | |
53 | ||
54 | } // namespace detail | |
55 | } // namespace asio | |
56 | } // namespace boost | |
57 | ||
58 | #include <boost/asio/detail/pop_options.hpp> | |
59 | ||
60 | #endif // defined(__GNUC__) | |
61 | // && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)) | |
62 | // && !defined(__INTEL_COMPILER) && !defined(__ICL) | |
63 | // && !defined(__ICC) && !defined(__ECC) && !defined(__PATHSCALE__) | |
64 | ||
65 | #endif // BOOST_ASIO_DETAIL_GCC_SYNC_FENCED_BLOCK_HPP |