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/*

 *  semclose.c,v 1.5 2002/01/04 18:28:24 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdarg.h>

#include <errno.h>

#include <fcntl.h>

#include <pthread.h>

#include <semaphore.h>

#include <limits.h>

#include <rtems/system.h>

#include <rtems/score/object.h>

#include <rtems/posix/semaphore.h>

#include <rtems/posix/time.h>

#include <rtems/seterr.h>

/*PAGE

 *

 *  sem_close

 *

 *  Routine to close a semaphore that has been opened or initialized.

 *

 *  11.2.4 Close a Named Semaphore, P1003.1b-1993, p.224

 */

int sem_close(

  sem_t *sem

)

{

  register POSIX_Semaphore_Control *the_semaphore;

  Objects_Locations                 location;

  the_semaphore = _POSIX_Semaphore_Get( sem, &location );

  switch ( location ) {

    case OBJECTS_ERROR:

      rtems_set_errno_and_return_minus_one( EINVAL );

    case OBJECTS_REMOTE:

      _Thread_Dispatch();

      return POSIX_MP_NOT_IMPLEMENTED();

      rtems_set_errno_and_return_minus_one( EINVAL );

    case OBJECTS_LOCAL:

      the_semaphore->open_count -= 1;

      _POSIX_Semaphore_Delete( the_semaphore );

      _Thread_Enable_dispatch();

      return 0;

  }

  return POSIX_BOTTOM_REACHED();

}