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1 | // | |
2 | // detail/gcc_hppa_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_HPPA_FENCED_BLOCK_HPP | |
12 | #define BOOST_ASIO_DETAIL_GCC_HPPA_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__) && (defined(__hppa) || defined(__hppa__)) | |
21 | ||
22 | #include <boost/asio/detail/push_options.hpp> | |
23 | ||
24 | namespace boost { | |
25 | namespace asio { | |
26 | namespace detail { | |
27 | ||
28 | class gcc_hppa_fenced_block | |
29 | : private noncopyable | |
30 | { | |
31 | public: | |
32 | enum half_t { half }; | |
33 | enum full_t { full }; | |
34 | ||
35 | // Constructor for a half fenced block. | |
36 | explicit gcc_hppa_fenced_block(half_t) | |
37 | { | |
38 | } | |
39 | ||
40 | // Constructor for a full fenced block. | |
41 | explicit gcc_hppa_fenced_block(full_t) | |
42 | { | |
43 | barrier(); | |
44 | } | |
45 | ||
46 | // Destructor. | |
47 | ~gcc_hppa_fenced_block() | |
48 | { | |
49 | barrier(); | |
50 | } | |
51 | ||
52 | private: | |
53 | static void barrier() | |
54 | { | |
55 | // This is just a placeholder and almost certainly not sufficient. | |
56 | __asm__ __volatile__ ("" : : : "memory"); | |
57 | } | |
58 | }; | |
59 | ||
60 | } // namespace detail | |
61 | } // namespace asio | |
62 | } // namespace boost | |
63 | ||
64 | #include <boost/asio/detail/pop_options.hpp> | |
65 | ||
66 | #endif // defined(__GNUC__) && (defined(__hppa) || defined(__hppa__)) | |
67 | ||
68 | #endif // BOOST_ASIO_DETAIL_GCC_HPPA_FENCED_BLOCK_HPP |