Subversion Repositories openrisc_2011-10-31

/*

 *  $Id: semdestroy.c,v 1.2 2001-09-27 11:59:17 chris Exp $

 */

#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/posix/seterr.h>

/*PAGE

 *

 *  11.2.2 Destroy an Unnamed Semaphore, P1003.1b-1993, p.220

 */

int sem_destroy(

  sem_t *sem

)

{

  register POSIX_Semaphore_Control *the_semaphore;

  Objects_Locations                 location;

  the_semaphore = _POSIX_Semaphore_Get( sem, &location );

  switch ( location ) {

    case OBJECTS_ERROR:

      set_errno_and_return_minus_one( EINVAL );

    case OBJECTS_REMOTE:

      _Thread_Dispatch();

      return POSIX_MP_NOT_IMPLEMENTED();

      set_errno_and_return_minus_one( EINVAL );

    case OBJECTS_LOCAL:

      /*

       *  Undefined operation on a named semaphore.

       */

      if ( the_semaphore->named == TRUE ) {

        _Thread_Enable_dispatch();

        set_errno_and_return_minus_one( EINVAL );

      }

      _POSIX_Semaphore_Delete( the_semaphore );

      _Thread_Enable_dispatch();

      return 0;

  }

  return POSIX_BOTTOM_REACHED();

}