blocxx
MutexLock.hpp
Go to the documentation of this file.
1/*******************************************************************************
2* Copyright (C) 2005, Vintela, Inc. All rights reserved.
3* Copyright (C) 2006, Novell, Inc. All rights reserved.
4*
5* Redistribution and use in source and binary forms, with or without
6* modification, are permitted provided that the following conditions are met:
7*
8* * Redistributions of source code must retain the above copyright notice,
9* this list of conditions and the following disclaimer.
10* * Redistributions in binary form must reproduce the above copyright
11* notice, this list of conditions and the following disclaimer in the
12* documentation and/or other materials provided with the distribution.
13* * Neither the name of
14* Vintela, Inc.,
15* nor Novell, Inc.,
16* nor the names of its contributors or employees may be used to
17* endorse or promote products derived from this software without
18* specific prior written permission.
19*
20* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30* POSSIBILITY OF SUCH DAMAGE.
31*******************************************************************************/
32
33
38
39#ifndef BLOCXX_MUTEXLOCK_HPP_INCLUDE_GUARD_
40#define BLOCXX_MUTEXLOCK_HPP_INCLUDE_GUARD_
41#include "blocxx/BLOCXX_config.h"
42#include "blocxx/Mutex.hpp"
43#include <cassert>
44
45namespace BLOCXX_NAMESPACE
46{
47
49class BLOCXX_COMMON_API MutexLock
50{
51public:
52 explicit MutexLock(Mutex& mutex, bool initially_locked=true)
53 : m_mutex(&mutex), m_locked(false)
54 {
55 if (initially_locked)
56 {
57 lock();
58 }
59 }
61 {
62 try
63 {
64 if (m_locked)
65 {
66 release();
67 }
68 }
69 catch (...)
70 {
71 // don't let exceptions escape
72 }
73 }
74 void lock()
75 {
76 assert(m_locked == false);
77 m_mutex->acquire();
78 m_locked = true;
79 }
80 void release()
81 {
82 assert(m_locked == true);
83 m_mutex->release();
84 m_locked = false;
85 }
86 MutexLock(const MutexLock& arg)
87 : m_mutex(arg.m_mutex), m_locked(arg.m_locked)
88 {
89 arg.m_locked = false;
90 }
91 bool isLocked() const
92 {
93 return m_locked;
94 }
95private:
97 mutable bool m_locked;
98 friend class Condition;
99};
100
101} // end namespace BLOCXX_NAMESPACE
102
103#endif
MutexLock(Mutex &mutex, bool initially_locked=true)
Definition MutexLock.hpp:52
MutexLock(const MutexLock &arg)
Definition MutexLock.hpp:86
Taken from RFC 1321.