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/*
* ITRON 3.0 Mailbox Manager
*
* 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 <itron.h>
#include <rtems/itron/mbox.h>
#include <rtems/itron/task.h>
/*
* ref_mbx - Reference Mailbox Status
*/
ER ref_mbx(
T_RMBX *pk_rmbx,
ID mbxid
)
{
register ITRON_Mailbox_Control *the_mailbox;
Objects_Locations location;
Chain_Control *pending;
if ( !pk_rmbx )
return E_PAR;
the_mailbox = _ITRON_Mailbox_Get( mbxid, &location );
switch ( location ) {
case OBJECTS_REMOTE:
case OBJECTS_ERROR:
return _ITRON_Mailbox_Clarify_get_id_error( mbxid );
case OBJECTS_LOCAL:
pending = &the_mailbox->message_queue.Pending_messages;
if ( _Chain_Is_empty( pending ) )
pk_rmbx->pk_msg = NULL;
else
pk_rmbx->pk_msg = (T_MSG *) pending->first;
/*
* Fill in whether or not there is a waiting task
*/
if ( !_Thread_queue_First( &the_mailbox->message_queue.Wait_queue ) )
pk_rmbx->wtsk = FALSE;
else
pk_rmbx->wtsk = TRUE;
break;
}
_ITRON_return_errorno( E_OK );
}
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