Source

Coin / include / Inventor / threads / SbRWMutex.h

Lars J. Aas 9814cbe 



Marius Kintel 3ba6b41 




























Lars J. Aas 9814cbe 

Lars J. Aas 8a9a9e4 
Lars J. Aas 9814cbe 








Lars J. Aas 5f3ee19 

Lars J. Aas 9814cbe 
Lars J. Aas 5f3ee19 
Lars J. Aas 9814cbe 
Peder Blekken c83684a 


















Lars J. Aas 9814cbe 

Lars J. Aas 5f3ee19 
Lars J. Aas 9814cbe 

Lars J. Aas 29b4a4f 
#ifndef COIN_SBRWMUTEX_H
#define COIN_SBRWMUTEX_H

/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

#include <Inventor/C/threads/rwmutex.h>

class SbRWMutex {
public:
  enum Precedence {
    READ_PRECEDENCE,
    WRITE_PRECEDENCE
  };

  SbRWMutex(Precedence policy) {
    this->rwmutex = cc_rwmutex_construct_etc(
      (policy == WRITE_PRECEDENCE)? CC_WRITE_PRECEDENCE : CC_READ_PRECEDENCE);
  }
  ~SbRWMutex(void) { cc_rwmutex_destruct(this->rwmutex); }

  int writeLock(void) { 
    return cc_rwmutex_write_lock(this->rwmutex) == CC_OK ? 0 : 1; 
  }
  SbBool tryWriteLock(void) { 
    return cc_rwmutex_write_try_lock(this->rwmutex) == CC_OK; 
  }
  int writeUnlock(void) { 
    return cc_rwmutex_write_unlock(this->rwmutex) == CC_OK ? 0 : 1; 
  }
  
  int readLock(void) { 
    return cc_rwmutex_read_lock(this->rwmutex) == CC_OK ? 0 : 1; 
  }
  int tryReadLock(void) { 
    return cc_rwmutex_read_try_lock(this->rwmutex) == CC_OK; 
  }
  int readUnlock(void) { 
    return cc_rwmutex_read_unlock(this->rwmutex) == CC_OK ? 0 : 1; 
  }

private:
  cc_rwmutex * rwmutex;
};

#endif // !COIN_SBRWMUTEX_H
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