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mutex.hxx
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20 #ifndef INCLUDED_OSL_MUTEX_HXX
21 #define INCLUDED_OSL_MUTEX_HXX
22
23 #include <osl/mutex.h>
24
25
26 namespace osl
27 {
30 class SAL_WARN_UNUSED Mutex {
31
32 public:
37 Mutex()
38 {
39 mutex = osl_createMutex();
40 }
41
45 ~Mutex()
46 {
47 osl_destroyMutex(mutex);
48 }
49
54 bool acquire()
55 {
56 return osl_acquireMutex(mutex);
57 }
58
63 bool tryToAcquire()
64 {
65 return osl_tryToAcquireMutex(mutex);
66 }
67
72 bool release()
73 {
74 return osl_releaseMutex(mutex);
75 }
76
83 static Mutex * getGlobalMutex()
84 {
85 return (Mutex *)osl_getGlobalMutex();
86 }
87
88 private:
89 oslMutex mutex;
90
97 Mutex(const Mutex&);
98
105 Mutex(oslMutex Mutex);
106
110 Mutex& operator= (const Mutex&);
111
115 Mutex& operator= (oslMutex);
116 };
117
120 template<class T>
121 class Guard
122 {
123 private:
124 Guard( const Guard& );
125 const Guard& operator = ( const Guard& );
126
127 protected:
128 T * pT;
129 public:
130
133 Guard(T * pT_) : pT(pT_)
134 {
135 pT->acquire();
136 }
137
140 Guard(T & t) : pT(&t)
141 {
142 pT->acquire();
143 }
144
146 ~Guard()
147 {
148 pT->release();
149 }
150 };
151
154 template<class T>
155 class ClearableGuard
156 {
157 private:
158 ClearableGuard( const ClearableGuard& );
159 const ClearableGuard& operator = ( const ClearableGuard& );
160 protected:
161 T * pT;
162 public:
163
166 ClearableGuard(T * pT_) : pT(pT_)
167 {
168 pT->acquire();
169 }
170
173 ClearableGuard(T & t) : pT(&t)
174 {
175 pT->acquire();
176 }
177
180 ~ClearableGuard()
181 {
182 if (pT)
183 pT->release();
184 }
185
188 void clear()
189 {
190 if(pT)
191 {
192 pT->release();
193 pT = NULL;
194 }
195 }
196 };
197
200 template< class T >
201 class ResettableGuard : public ClearableGuard< T >
202 {
203 private:
204 ResettableGuard(ResettableGuard &); // not defined
205 void operator =(ResettableGuard &); // not defined
206
207 protected:
208 T* pResetT;
209 public:
212 ResettableGuard( T* pT_ ) :
213 ClearableGuard<T>( pT_ ),
214 pResetT( pT_ )
215 {}
216
219 ResettableGuard( T& rT ) :
220 ClearableGuard<T>( rT ),
221 pResetT( &rT )
222 {}
223
226 void reset()
227 {
228 if( pResetT )
229 {
230 this->pT = pResetT;
231 this->pT->acquire();
232 }
233 }
234 };
235
236 typedef Guard<Mutex> MutexGuard;
237 typedef ClearableGuard<Mutex> ClearableMutexGuard;
238 typedef ResettableGuard< Mutex > ResettableMutexGuard;
239 }
240
241 #endif // INCLUDED_OSL_MUTEX_HXX
242
243 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
osl::Mutex::tryToAcquire
bool tryToAcquire()
Try to acquire the mutex without blocking.
Definition: mutex.hxx:63
osl::Guard
A helper class for mutex objects and interfaces.
Definition: mutex.hxx:121
osl::ClearableGuard::ClearableGuard
ClearableGuard(T &t)
Acquires the object specified as parameter.
Definition: mutex.hxx:173
osl::Mutex
A mutual exclusion synchronization object.
Definition: mutex.hxx:30
osl::ResettableGuard
A helper class for mutex objects and interfaces.
Definition: mutex.hxx:201
mutex.h
osl::Guard::Guard
Guard(T &t)
Acquires the object specified as parameter.
Definition: mutex.hxx:140
osl_destroyMutex
SAL_DLLPUBLIC void osl_destroyMutex(oslMutex Mutex)
Release the OS-structures and free mutex data-structure.
osl::ClearableMutexGuard
ClearableGuard< Mutex > ClearableMutexGuard
Definition: mutex.hxx:237
osl::ClearableGuard::clear
void clear()
Releases the mutex or interface.
Definition: mutex.hxx:188
osl::ClearableGuard::~ClearableGuard
~ClearableGuard()
Releases the mutex or interface if not already released by clear().
Definition: mutex.hxx:180
osl::Mutex::acquire
bool acquire()
Acquire the mutex, block if already acquired by another thread.
Definition: mutex.hxx:54
osl::Guard::pT
T * pT
Definition: mutex.hxx:128
osl::Mutex::Mutex
Mutex()
Create a mutex.
Definition: mutex.hxx:37
osl::Mutex::~Mutex
~Mutex()
Release the OS-structures and free mutex data-structure.
Definition: mutex.hxx:45
osl::ResettableMutexGuard
ResettableGuard< Mutex > ResettableMutexGuard
Definition: mutex.hxx:238
osl::MutexGuard
Guard< Mutex > MutexGuard
Definition: mutex.hxx:236
osl::ResettableGuard::reset
void reset()
Re-aquires the mutex or interface.
Definition: mutex.hxx:226
osl::ResettableGuard::ResettableGuard
ResettableGuard(T &rT)
Acquires the object specified as parameter.
Definition: mutex.hxx:219
osl::ClearableGuard::pT
T * pT
Definition: mutex.hxx:161
osl
Definition: conditn.hxx:28
osl::Mutex::release
bool release()
Release the mutex.
Definition: mutex.hxx:72
osl::ResettableGuard::pResetT
T * pResetT
Definition: mutex.hxx:208
osl_getGlobalMutex
SAL_DLLPUBLIC oslMutex * osl_getGlobalMutex(void)
Returns a unique and global mutex.
osl::ResettableGuard::ResettableGuard
ResettableGuard(T *pT_)
Acquires the object specified as parameter.
Definition: mutex.hxx:212
osl_createMutex
SAL_DLLPUBLIC oslMutex osl_createMutex(void)
Create a mutex.
osl::ClearableGuard
A helper class for mutex objects and interfaces.
Definition: mutex.hxx:155
osl::Guard::~Guard
~Guard()
Releases the mutex or interface.
Definition: mutex.hxx:146
osl::ClearableGuard::ClearableGuard
ClearableGuard(T *pT_)
Acquires the object specified as parameter.
Definition: mutex.hxx:166
osl::Mutex::getGlobalMutex
static Mutex * getGlobalMutex()
Returns a global static mutex object.
Definition: mutex.hxx:83
osl::Guard::Guard
Guard(T *pT_)
Acquires the object specified as parameter.
Definition: mutex.hxx:133
osl_acquireMutex
SAL_DLLPUBLIC sal_Bool osl_acquireMutex(oslMutex Mutex)
Acquire the mutex, block if already acquired by another thread.
oslMutex
struct _oslMutexImpl * oslMutex
Definition: mutex.h:33
SAL_WARN_UNUSED
#define SAL_WARN_UNUSED
Annotate classes where a compiler should warn if an instance is unused.
Definition: types.h:588
osl_releaseMutex
SAL_DLLPUBLIC sal_Bool osl_releaseMutex(oslMutex Mutex)
Release the mutex.
osl_tryToAcquireMutex
SAL_DLLPUBLIC sal_Bool osl_tryToAcquireMutex(oslMutex Mutex)
Try to acquire the mutex without blocking.