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Coin / src / threads / mutex_pthread.icc

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Lars J. Aas 92263e4 
Marius Kintel 3ba6b41 




























Lars J. Aas 92263e4 




































































/**************************************************************************\
 * 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.
\**************************************************************************/

/* this file should only be included from mutex.c */

static int
internal_mutex_struct_init(cc_mutex * mutex_struct)
{
  int status = pthread_mutex_init(&mutex_struct->pthread.mutexid, NULL);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_mutex_struct_init",
                         "pthread_mutex_init() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_mutex_struct_clean(cc_mutex * mutex_struct)
{
  int status = pthread_mutex_destroy(&mutex_struct->pthread.mutexid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_mutex_struct_clean",
                         "pthread_mutex_destroy() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_mutex_lock(cc_mutex * mutex)
{
  int status = pthread_mutex_lock(&mutex->pthread.mutexid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_mutex_lock",
                         "pthread_mutex_lock() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_mutex_try_lock(cc_mutex * mutex)
{
  int status = pthread_mutex_trylock(&mutex->pthread.mutexid);
  if (status == EBUSY) return CC_BUSY;
  else if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_mutex_try_lock",
                         "pthread_mutex_trylock() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}

static int
internal_mutex_unlock(cc_mutex * mutex)
{
  int status = pthread_mutex_unlock(&mutex->pthread.mutexid);
  if (status != 0) {
    if (COIN_DEBUG)
      cc_debugerror_post("internal_mutex_unlock",
                         "pthread_mutex_unlock() error: %d\n", status);
    return CC_ERROR;
  }
  return CC_OK;
}