path: root/cpukit/posix/src/conddestroy.c

/**
 *  @file
 *
 *  @brief Destroy a Condition Variable
 *  @ingroup POSIXAPI
 */

/*
 *  COPYRIGHT (c) 1989-2007.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include <pthread.h>
#include <errno.h>

#include <rtems/system.h>
#include <rtems/score/watchdog.h>
#include <rtems/posix/condimpl.h>
#include <rtems/posix/muteximpl.h>

/**
 *  11.4.2 Initializing and Destroying a Condition Variable,
 *         P1003.1c/Draft 10, p. 87
 */
int pthread_cond_destroy(
  pthread_cond_t           *cond
)
{
  POSIX_Condition_variables_Control *the_cond;
  Objects_Locations                  location;

  _Objects_Allocator_lock();
  the_cond = _POSIX_Condition_variables_Get( cond, &location );
  switch ( location ) {

    case OBJECTS_LOCAL:

      if (
        _Thread_queue_First(
          &the_cond->Wait_queue,
          POSIX_CONDITION_VARIABLES_TQ_OPERATIONS
        )
      ) {
        _Objects_Put( &the_cond->Object );
        _Objects_Allocator_unlock();
        return EBUSY;
      }

      _Objects_Close(
        &_POSIX_Condition_variables_Information,
        &the_cond->Object
      );
      _Objects_Put( &the_cond->Object );
      _POSIX_Condition_variables_Free( the_cond );
      _Objects_Allocator_unlock();
      return 0;

#if defined(RTEMS_MULTIPROCESSING)
    case OBJECTS_REMOTE:
#endif
    case OBJECTS_ERROR:
      break;
  }

  _Objects_Allocator_unlock();

  return EINVAL;
}