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/*
* ITRON Message Buffer 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.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <itron.h>
#include <rtems/itron/msgbuffer.h>
#include <rtems/itron/task.h>
/*
* ref_mbf - Reference Message Buffer Status
*/
ER ref_mbf(
T_RMBF *pk_rmbf,
ID mbfid
)
{
ITRON_Message_buffer_Control *the_message_buffer;
Objects_Locations location;
CORE_message_queue_Control *the_core_msgq;
if ( !pk_rmbf )
return E_PAR; /* XXX check this error code */
the_message_buffer = _ITRON_Message_buffer_Get( mbfid, &location );
switch ( location ) {
case OBJECTS_REMOTE: /* Multiprocessing not supported */
case OBJECTS_ERROR:
return _ITRON_Message_buffer_Clarify_get_id_error( mbfid );
case OBJECTS_LOCAL:
the_core_msgq = &the_message_buffer->message_queue;
/*
* Fill in the size of message to be sent
*/
if (the_core_msgq->number_of_pending_messages == 0) {
pk_rmbf->msgsz = 0;
} else {
pk_rmbf->msgsz = ((CORE_message_queue_Buffer_control *)
the_core_msgq->Pending_messages.first)->Contents.size;
}
/*
* Fill in the size of free buffer
*/
pk_rmbf->frbufsz =
(the_core_msgq->maximum_pending_messages -
the_core_msgq->number_of_pending_messages) *
the_core_msgq->maximum_message_size;
/*
* Fill in whether or not there is a waiting task
*/
if ( !_Thread_queue_First(&the_core_msgq->Wait_queue ) )
pk_rmbf->wtsk = FALSE;
else
pk_rmbf->wtsk = TRUE;
pk_rmbf->stsk = FALSE;
_Thread_Enable_dispatch();
return E_OK;
}
return E_OK;
}
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