source: rtems/cpukit/itron/src/ref_mbx.c @ e49f9e6b

4.104.114.84.95
Last change on this file since e49f9e6b was e49f9e6b, checked in by Joel Sherrill <joel.sherrill@…>, on 09/04/03 at 18:54:02

2003-09-04 Joel Sherrill <joel@…>

  • include/itron.h, include/itronsys/eventflags.h, include/itronsys/fmempool.h, include/itronsys/intr.h, include/itronsys/mbox.h, include/itronsys/msgbuffer.h, include/itronsys/network.h, include/itronsys/port.h, include/itronsys/semaphore.h, include/itronsys/status.h, include/itronsys/sysmgmt.h, include/itronsys/task.h, include/itronsys/time.h, include/itronsys/types.h, include/itronsys/vmempool.h, include/rtems/itron/config.h, include/rtems/itron/eventflags.h, include/rtems/itron/fmempool.h, include/rtems/itron/intr.h, include/rtems/itron/itronapi.h, include/rtems/itron/mbox.h, include/rtems/itron/msgbuffer.h, include/rtems/itron/network.h, include/rtems/itron/object.h, include/rtems/itron/port.h, include/rtems/itron/semaphore.h, include/rtems/itron/sysmgmt.h, include/rtems/itron/task.h, include/rtems/itron/time.h, include/rtems/itron/vmempool.h, inline/rtems/itron/eventflags.inl, inline/rtems/itron/fmempool.inl, inline/rtems/itron/intr.inl, inline/rtems/itron/mbox.inl, inline/rtems/itron/msgbuffer.inl, inline/rtems/itron/network.inl, inline/rtems/itron/port.inl, inline/rtems/itron/semaphore.inl, inline/rtems/itron/sysmgmt.inl, inline/rtems/itron/task.inl, inline/rtems/itron/time.inl, inline/rtems/itron/vmempool.inl, macros/rtems/itron/eventflags.inl, macros/rtems/itron/fmempool.inl, macros/rtems/itron/intr.inl, macros/rtems/itron/mbox.inl, macros/rtems/itron/msgbuffer.inl, macros/rtems/itron/network.inl, macros/rtems/itron/port.inl, macros/rtems/itron/semaphore.inl, macros/rtems/itron/sysmgmt.inl, macros/rtems/itron/task.inl, macros/rtems/itron/time.inl, macros/rtems/itron/vmempool.inl, src/can_wup.c, src/chg_pri.c, src/cre_mbf.c, src/cre_mbx.c, src/cre_sem.c, src/cre_tsk.c, src/del_mbf.c, src/del_mbx.c, src/del_sem.c, src/del_tsk.c, src/dis_dsp.c, src/ena_dsp.c, src/eventflags.c, src/exd_tsk.c, src/ext_tsk.c, src/fmempool.c, src/frsm_tsk.c, src/get_tid.c, src/itronintr.c, src/itronsem.c, src/itrontime.c, src/mbox.c, src/mboxtranslatereturncode.c, src/msgbuffer.c, src/msgbuffertranslatereturncode.c, src/network.c, src/port.c, src/prcv_mbf.c, src/prcv_mbx.c, src/preq_sem.c, src/psnd_mbf.c, src/rcv_mbf.c, src/rcv_mbx.c, src/ref_mbf.c, src/ref_mbx.c, src/ref_sem.c, src/ref_tsk.c, src/rel_wai.c, src/rot_rdq.c, src/rsm_tsk.c, src/sig_sem.c, src/slp_tsk.c, src/snd_mbf.c, src/snd_mbx.c, src/sta_tsk.c, src/sus_tsk.c, src/sysmgmt.c, src/task.c, src/ter_tsk.c, src/trcv_mbf.c, src/trcv_mbx.c, src/tslp_tsk.c, src/tsnd_mbf.c, src/twai_sem.c, src/vmempool.c, src/wai_sem.c, src/wup_tsk.c: URL for license changed.
  • Property mode set to 100644
File size: 1.4 KB
Line 
1/*
2 *  ITRON 3.0 Mailbox Manager
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <itron.h>
19
20#include <rtems/itron/mbox.h>
21#include <rtems/itron/task.h>
22
23/*
24 *  ref_mbx - Reference Mailbox Status
25 */
26
27ER ref_mbx(
28  T_RMBX *pk_rmbx,
29  ID      mbxid
30)
31{
32  register ITRON_Mailbox_Control *the_mailbox;
33  Objects_Locations               location;
34  Chain_Control                  *pending;
35
36  if ( !pk_rmbx )
37    return E_PAR;
38
39  the_mailbox = _ITRON_Mailbox_Get( mbxid, &location );
40  switch ( location ) {
41    case OBJECTS_REMOTE:
42    case OBJECTS_ERROR:
43      return _ITRON_Mailbox_Clarify_get_id_error( mbxid );
44
45    case OBJECTS_LOCAL:
46
47      pending = &the_mailbox->message_queue.Pending_messages;
48      if ( _Chain_Is_empty( pending ) )
49        pk_rmbx->pk_msg = NULL;
50      else
51        pk_rmbx->pk_msg = (T_MSG *) pending->first;
52
53      /*
54       *  Fill in whether or not there is a waiting task
55       */
56
57      if ( !_Thread_queue_First( &the_mailbox->message_queue.Wait_queue ) )
58        pk_rmbx->wtsk = FALSE;
59      else
60        pk_rmbx->wtsk = TRUE;
61
62      break;
63  }
64  _ITRON_return_errorno( E_OK );
65}
66
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