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1 | ////////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2011-2012. 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_WINAPI_MUTEX_WRAPPER_HPP | |
12 | #define BOOST_INTERPROCESS_DETAIL_WINAPI_MUTEX_WRAPPER_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 | #include <boost/interprocess/creation_tags.hpp> | |
25 | #include <boost/interprocess/permissions.hpp> | |
26 | #include <boost/interprocess/detail/win32_api.hpp> | |
27 | #include <boost/interprocess/detail/posix_time_types_wrk.hpp> | |
28 | #include <boost/interprocess/sync/windows/winapi_wrapper_common.hpp> | |
29 | #include <boost/interprocess/errors.hpp> | |
30 | #include <boost/interprocess/exceptions.hpp> | |
31 | #include <limits> | |
32 | ||
33 | namespace boost { | |
34 | namespace interprocess { | |
35 | namespace ipcdetail { | |
36 | ||
37 | class winapi_mutex_functions | |
38 | { | |
39 | #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) | |
40 | ||
41 | //Non-copyable | |
42 | winapi_mutex_functions(const winapi_mutex_functions &); | |
43 | winapi_mutex_functions &operator=(const winapi_mutex_functions &); | |
44 | #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED | |
45 | ||
46 | public: | |
47 | winapi_mutex_functions(void *mtx_hnd) | |
48 | : m_mtx_hnd(mtx_hnd) | |
49 | {} | |
50 | ||
51 | void unlock() | |
52 | { winapi::release_mutex(m_mtx_hnd); } | |
53 | ||
54 | void lock() | |
55 | { return winapi_wrapper_wait_for_single_object(m_mtx_hnd); } | |
56 | ||
57 | bool try_lock() | |
58 | { return winapi_wrapper_try_wait_for_single_object(m_mtx_hnd); } | |
59 | ||
60 | bool timed_lock(const boost::posix_time::ptime &abs_time) | |
61 | { return winapi_wrapper_timed_wait_for_single_object(m_mtx_hnd, abs_time); } | |
62 | ||
63 | #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) | |
64 | protected: | |
65 | void *m_mtx_hnd; | |
66 | #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED | |
67 | }; | |
68 | ||
69 | //Swappable mutex wrapper | |
70 | class winapi_mutex_wrapper | |
71 | : public winapi_mutex_functions | |
72 | { | |
73 | #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) | |
74 | ||
75 | //Non-copyable | |
76 | winapi_mutex_wrapper(const winapi_mutex_wrapper &); | |
77 | winapi_mutex_wrapper &operator=(const winapi_mutex_wrapper &); | |
78 | #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED | |
79 | ||
80 | //Note that Windows API does not return winapi::invalid_handle_value | |
81 | //when failing to create/open a mutex, but a nullptr | |
82 | ||
83 | public: | |
84 | winapi_mutex_wrapper(void *mtx_hnd = 0) | |
85 | : winapi_mutex_functions(mtx_hnd) | |
86 | {} | |
87 | ||
88 | ~winapi_mutex_wrapper() | |
89 | { this->close(); } | |
90 | ||
91 | void *release() | |
92 | { | |
93 | void *hnd = m_mtx_hnd; | |
94 | m_mtx_hnd = 0; | |
95 | return hnd; | |
96 | } | |
97 | ||
98 | void *handle() const | |
99 | { return m_mtx_hnd; } | |
100 | ||
101 | bool open_or_create(const char *name, const permissions &perm) | |
102 | { | |
103 | if(m_mtx_hnd == 0){ | |
104 | m_mtx_hnd = winapi::open_or_create_mutex | |
105 | ( name | |
106 | , false | |
107 | , (winapi::interprocess_security_attributes*)perm.get_permissions() | |
108 | ); | |
109 | return m_mtx_hnd != 0; | |
110 | } | |
111 | else{ | |
112 | return false; | |
113 | } | |
114 | } | |
115 | ||
116 | void close() | |
117 | { | |
118 | if(m_mtx_hnd != 0){ | |
119 | winapi::close_handle(m_mtx_hnd); | |
120 | m_mtx_hnd = 0; | |
121 | } | |
122 | } | |
123 | ||
124 | void swap(winapi_mutex_wrapper &other) | |
125 | { void *tmp = m_mtx_hnd; m_mtx_hnd = other.m_mtx_hnd; other.m_mtx_hnd = tmp; } | |
126 | }; | |
127 | ||
128 | } //namespace ipcdetail { | |
129 | } //namespace interprocess { | |
130 | } //namespace boost { | |
131 | ||
132 | #include <boost/interprocess/detail/config_end.hpp> | |
133 | ||
134 | #endif //BOOST_INTERPROCESS_DETAIL_WINAPI_MUTEX_WRAPPER_HPP |