source:
vendors/XIOS/current/extern/boost/include/boost/smart_ptr/detail/atomic_count_gcc.hpp
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1 | #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED |
3 | |
4 | // |
5 | // boost/detail/atomic_count_gcc.hpp |
6 | // |
7 | // atomic_count for GNU libstdc++ v3 |
8 | // |
9 | // http://gcc.gnu.org/onlinedocs/porting/Thread-safety.html |
10 | // |
11 | // Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd. |
12 | // Copyright (c) 2002 Lars Gullik Bjønnes <larsbj@lyx.org> |
13 | // Copyright 2003-2005 Peter Dimov |
14 | // |
15 | // Distributed under the Boost Software License, Version 1.0. (See |
16 | // accompanying file LICENSE_1_0.txt or copy at |
17 | // http://www.boost.org/LICENSE_1_0.txt) |
18 | // |
19 | |
20 | #if __GNUC__ * 100 + __GNUC_MINOR__ >= 402 |
21 | # include <ext/atomicity.h> |
22 | #else |
23 | # include <bits/atomicity.h> |
24 | #endif |
25 | |
26 | namespace boost |
27 | { |
28 | |
29 | namespace detail |
30 | { |
31 | |
32 | #if defined(__GLIBCXX__) // g++ 3.4+ |
33 | |
34 | using __gnu_cxx::__atomic_add; |
35 | using __gnu_cxx::__exchange_and_add; |
36 | |
37 | #endif |
38 | |
39 | class atomic_count |
40 | { |
41 | public: |
42 | |
43 | explicit atomic_count( long v ) : value_( v ) {} |
44 | |
45 | long operator++() |
46 | { |
47 | return __exchange_and_add( &value_, +1 ) + 1; |
48 | } |
49 | |
50 | long operator--() |
51 | { |
52 | return __exchange_and_add( &value_, -1 ) - 1; |
53 | } |
54 | |
55 | operator long() const |
56 | { |
57 | return __exchange_and_add( &value_, 0 ); |
58 | } |
59 | |
60 | private: |
61 | |
62 | atomic_count(atomic_count const &); |
63 | atomic_count & operator=(atomic_count const &); |
64 | |
65 | mutable _Atomic_word value_; |
66 | }; |
67 | |
68 | } // namespace detail |
69 | |
70 | } // namespace boost |
71 | |
72 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED |
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