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/*
* rtems_semaphore_flush
*
* DESCRIPTION:
*
* This package is the implementation of the flush directive
* of the Semaphore Manager.
*
* COPYRIGHT (c) 1989-1999.
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/rtems/attr.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/sem.h>
#include <rtems/score/coremutex.h>
#include <rtems/score/coresem.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/mpci.h>
#endif
#include <rtems/score/sysstate.h>
#include <rtems/score/interr.h>
/*PAGE
*
* rtems_semaphore_flush
*
* This directive allows a thread to flush the threads
* pending on the semaphore.
*
* Input parameters:
* id - semaphore id
*
* Output parameters:
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
#if defined(RTEMS_MULTIPROCESSING)
#define SEND_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted
#else
#define SEND_OBJECT_WAS_DELETED NULL
#endif
rtems_status_code rtems_semaphore_flush(
Objects_Id id
)
{
register Semaphore_Control *the_semaphore;
Objects_Locations location;
the_semaphore = _Semaphore_Get( id, &location );
switch ( location ) {
case OBJECTS_REMOTE:
#if defined(RTEMS_MULTIPROCESSING)
_Thread_Dispatch();
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
case OBJECTS_ERROR:
return RTEMS_INVALID_ID;
case OBJECTS_LOCAL:
if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) {
_CORE_mutex_Flush(
&the_semaphore->Core_control.mutex,
SEND_OBJECT_WAS_DELETED,
CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT
);
} else {
_CORE_semaphore_Flush(
&the_semaphore->Core_control.semaphore,
SEND_OBJECT_WAS_DELETED,
CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT
);
}
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
}
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