1 #ifndef COIN_SBRWMUTEX_H 2 #define COIN_SBRWMUTEX_H 3 4 /**************************************************************************\ 5 * Copyright (c) Kongsberg Oil & Gas Technologies AS 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are 10 * met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * Neither the name of the copyright holder nor the names of its 20 * contributors may be used to endorse or promote products derived from 21 * this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 \**************************************************************************/ 35 36 #include <Inventor/C/threads/rwmutex.h> 37 38 class SbRWMutex { 39 public: 40 enum Precedence { 41 READ_PRECEDENCE, 42 WRITE_PRECEDENCE 43 }; 44 SbRWMutex(Precedence policy)45 SbRWMutex(Precedence policy) { 46 this->rwmutex = cc_rwmutex_construct_etc( 47 (policy == WRITE_PRECEDENCE)? CC_WRITE_PRECEDENCE : CC_READ_PRECEDENCE); 48 } ~SbRWMutex(void)49 ~SbRWMutex(void) { cc_rwmutex_destruct(this->rwmutex); } 50 writeLock(void)51 int writeLock(void) { 52 return cc_rwmutex_write_lock(this->rwmutex) == CC_OK ? 0 : 1; 53 } tryWriteLock(void)54 SbBool tryWriteLock(void) { 55 return cc_rwmutex_write_try_lock(this->rwmutex) == CC_OK; 56 } writeUnlock(void)57 int writeUnlock(void) { 58 return cc_rwmutex_write_unlock(this->rwmutex) == CC_OK ? 0 : 1; 59 } 60 readLock(void)61 int readLock(void) { 62 return cc_rwmutex_read_lock(this->rwmutex) == CC_OK ? 0 : 1; 63 } tryReadLock(void)64 int tryReadLock(void) { 65 return cc_rwmutex_read_try_lock(this->rwmutex) == CC_OK; 66 } readUnlock(void)67 int readUnlock(void) { 68 return cc_rwmutex_read_unlock(this->rwmutex) == CC_OK ? 0 : 1; 69 } 70 71 private: 72 cc_rwmutex * rwmutex; 73 }; 74 75 #endif // !COIN_SBRWMUTEX_H 76