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SbRWMutex.h
1 #ifndef COIN_SBRWMUTEX_H
2 #define COIN_SBRWMUTEX_H
3 
4 /**************************************************************************\
5  *
6  * This file is part of the Coin 3D visualization library.
7  * Copyright (C) by Kongsberg Oil & Gas Technologies.
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * ("GPL") version 2 as published by the Free Software Foundation.
12  * See the file LICENSE.GPL at the root directory of this source
13  * distribution for additional information about the GNU GPL.
14  *
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16  * GPL, and for taking advantage of the additional benefits of our
17  * support services, please contact Kongsberg Oil & Gas Technologies
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19  *
20  * See http://www.coin3d.org/ for more information.
21  *
22  * Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
23  * http://www.sim.no/ sales@sim.no coin-support@coin3d.org
24  *
25 \**************************************************************************/
26 
27 #include <Inventor/C/threads/rwmutex.h>
28 
29 class SbRWMutex {
30 public:
31  enum Precedence {
32  READ_PRECEDENCE,
33  WRITE_PRECEDENCE
34  };
35 
36  SbRWMutex(Precedence policy) {
37  this->rwmutex = cc_rwmutex_construct_etc(
38  (policy == WRITE_PRECEDENCE)? CC_WRITE_PRECEDENCE : CC_READ_PRECEDENCE);
39  }
40  ~SbRWMutex(void) { cc_rwmutex_destruct(this->rwmutex); }
41 
42  int writeLock(void) {
43  return cc_rwmutex_write_lock(this->rwmutex) == CC_OK ? 0 : 1;
44  }
45  SbBool tryWriteLock(void) {
46  return cc_rwmutex_write_try_lock(this->rwmutex) == CC_OK;
47  }
48  int writeUnlock(void) {
49  return cc_rwmutex_write_unlock(this->rwmutex) == CC_OK ? 0 : 1;
50  }
51 
52  int readLock(void) {
53  return cc_rwmutex_read_lock(this->rwmutex) == CC_OK ? 0 : 1;
54  }
55  int tryReadLock(void) {
56  return cc_rwmutex_read_try_lock(this->rwmutex) == CC_OK;
57  }
58  int readUnlock(void) {
59  return cc_rwmutex_read_unlock(this->rwmutex) == CC_OK ? 0 : 1;
60  }
61 
62 private:
63  cc_rwmutex * rwmutex;
64 };
65 
66 #endif // !COIN_SBRWMUTEX_H
int tryReadLock(void)
Definition: SbRWMutex.h:55
int readLock(void)
Definition: SbRWMutex.h:52
~SbRWMutex(void)
Definition: SbRWMutex.h:40
int readUnlock(void)
Definition: SbRWMutex.h:58
SbRWMutex(Precedence policy)
Definition: SbRWMutex.h:36
int writeUnlock(void)
Definition: SbRWMutex.h:48
SbBool tryWriteLock(void)
Definition: SbRWMutex.h:45
int writeLock(void)
Definition: SbRWMutex.h:42
Definition: SbRWMutex.h:29

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