text: /*
   * Copyright (C) 2014  René Kijewski  <rene.kijewski@fu-berlin.de>
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   */
  
  /**
   * @ingroup     pthread
   * @{
   *
   * @file
   * @brief       Implementation of a fair, POSIX conforming reader/writer lock (attribute set).
   *
   * @author      René Kijewski <rene.kijewski@fu-berlin.de>
   *
   * @}
   */
  
  #include "pthread.h"
  
  #include <string.h>
  
  int pthread_rwlockattr_init(pthread_rwlockattr_t *attr)
  {
      if (attr == NULL) {
          return EINVAL;
      }
  
      memset(attr, 0, sizeof (*attr));
      return 0;
  }
  
  int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr)
  {
      if (attr == NULL) {
          return EINVAL;
      }
  
      (void) attr;
      return 0;
  }
  
  /* Return current setting of process-shared attribute of ATTR in PSHARED.  */
  int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr, int *pshared)
  {
      if (attr == NULL || pshared == NULL) {
          return EINVAL;
      }
  
      *pshared = attr->pshared;
      return 0;
  }
  
  int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared)
  {
      if (attr == NULL || (pshared != PTHREAD_PROCESS_SHARED && pshared != PTHREAD_PROCESS_PRIVATE)) {
          return EINVAL;
      }
  
      attr->pshared = pshared;
      return 0;
  }
  