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/*

 *  $Id: sempost.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

 *

 *  11.2.7 Unlock a Semaphore, P1003.1b-1993, p.227

 */

int sem_post(

  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:

      _CORE_semaphore_Surrender(

        &the_semaphore->Semaphore,

        the_semaphore->Object.id,

#if defined(RTEMS_MULTIPROCESSING)

        NULL         /* XXX need to define a routine to handle this case */

#else

        NULL

#endif

      );

      _Thread_Enable_dispatch();

      return 0;

  }

  return POSIX_BOTTOM_REACHED();

}