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1 | ////////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2012-2012. Distributed under the Boost | |
4 | // Software License, Version 1.0. (See accompanying file | |
5 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | // See http://www.boost.org/libs/interprocess for documentation. | |
8 | // | |
9 | ////////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | #ifndef BOOST_INTERPROCESS_DETAIL_LOCKS_HPP | |
12 | #define BOOST_INTERPROCESS_DETAIL_LOCKS_HPP | |
13 | ||
14 | #ifndef BOOST_CONFIG_HPP | |
15 | # include <boost/config.hpp> | |
16 | #endif | |
17 | # | |
18 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
19 | # pragma once | |
20 | #endif | |
21 | ||
22 | #include <boost/interprocess/detail/config_begin.hpp> | |
23 | #include <boost/interprocess/detail/workaround.hpp> | |
24 | ||
25 | namespace boost { | |
26 | namespace interprocess { | |
27 | namespace ipcdetail { | |
28 | ||
29 | template<class Lock> | |
30 | class internal_mutex_lock | |
31 | { | |
32 | typedef void (internal_mutex_lock::*unspecified_bool_type)(); | |
33 | public: | |
34 | ||
35 | typedef typename Lock::mutex_type::internal_mutex_type mutex_type; | |
36 | ||
37 | ||
38 | internal_mutex_lock(Lock &l) | |
39 | : l_(l) | |
40 | {} | |
41 | ||
42 | mutex_type* mutex() const | |
43 | { return l_ ? &l_.mutex()->internal_mutex() : 0; } | |
44 | ||
45 | void lock() { l_.lock(); } | |
46 | ||
47 | void unlock() { l_.unlock(); } | |
48 | ||
49 | operator unspecified_bool_type() const | |
50 | { return l_ ? &internal_mutex_lock::lock : 0; } | |
51 | ||
52 | private: | |
53 | Lock &l_; | |
54 | }; | |
55 | ||
56 | template <class Lock> | |
57 | class lock_inverter | |
58 | { | |
59 | Lock &l_; | |
60 | public: | |
61 | lock_inverter(Lock &l) | |
62 | : l_(l) | |
63 | {} | |
64 | void lock() { l_.unlock(); } | |
65 | void unlock() { l_.lock(); } | |
66 | }; | |
67 | ||
68 | template <class Lock> | |
69 | class lock_to_sharable | |
70 | { | |
71 | Lock &l_; | |
72 | ||
73 | public: | |
74 | explicit lock_to_sharable(Lock &l) | |
75 | : l_(l) | |
76 | {} | |
77 | void lock() { l_.lock_sharable(); } | |
78 | bool try_lock(){ return l_.try_lock_sharable(); } | |
79 | void unlock() { l_.unlock_sharable(); } | |
80 | }; | |
81 | ||
82 | template <class Lock> | |
83 | class lock_to_wait | |
84 | { | |
85 | Lock &l_; | |
86 | ||
87 | public: | |
88 | explicit lock_to_wait(Lock &l) | |
89 | : l_(l) | |
90 | {} | |
91 | void lock() { l_.wait(); } | |
92 | bool try_lock(){ return l_.try_wait(); } | |
93 | }; | |
94 | ||
95 | } //namespace ipcdetail | |
96 | } //namespace interprocess | |
97 | } //namespace boost | |
98 | ||
99 | #include <boost/interprocess/detail/config_end.hpp> | |
100 | ||
101 | #endif //BOOST_INTERPROCESS_DETAIL_LOCKS_HPP |