source: rtems/cpukit/itron/src/trcv_mbf.c @ f42b726

4.104.114.84.95
Last change on this file since f42b726 was f42b726, checked in by Joel Sherrill <joel.sherrill@…>, on 01/24/01 at 14:17:28

2001-01-24 Ralf Corsepius <corsepiu@…>

  • configure.in: Add src/config.h
  • src/Makefile.am: Add INCLUDES += -I. to pickup config.h
  • src/.cvsignore: Add config.h and stamp-h
  • src/*.c: Add config.h support.
  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 *  ITRON Message Buffer 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.OARcorp.com/rtems/license.html.
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/msgbuffer.h>
21#include <rtems/itron/task.h>
22
23/*
24 *  trcv_mbf - Receive Message from MessageBuffer with Timeout
25 */
26
27ER trcv_mbf(
28  VP   msg,
29  INT *p_msgsz,
30  ID   mbfid,
31  TMO  tmout
32)
33{
34  ITRON_Message_buffer_Control   *the_message_buffer;
35  Objects_Locations               location;
36  CORE_message_queue_Status       status;
37  boolean                         wait;
38  Watchdog_Interval               interval;
39
40  interval = 0;
41  if (tmout == TMO_POL) {
42    wait = FALSE;
43  } else {
44    wait = TRUE;
45    if (tmout != TMO_FEVR)
46      interval = TOD_MILLISECONDS_TO_TICKS(tmout);
47  }
48
49  if (wait && _ITRON_Is_in_non_task_state() )
50    return E_CTX;
51
52  if (!p_msgsz || !msg || tmout <= -2)
53    return E_PAR;
54   
55  the_message_buffer = _ITRON_Message_buffer_Get(mbfid, &location);
56  switch (location) {
57    case OBJECTS_REMOTE:
58    case OBJECTS_ERROR:           /* Multiprocessing not supported */
59      return _ITRON_Message_buffer_Clarify_get_id_error(mbfid);
60
61    case OBJECTS_LOCAL:
62      _CORE_message_queue_Seize(
63          &the_message_buffer->message_queue,
64          the_message_buffer->Object.id,
65          msg,
66          p_msgsz,
67          wait,
68          interval
69      );
70      _Thread_Enable_dispatch();
71      status = (CORE_message_queue_Status)_Thread_Executing->Wait.return_code;
72      return
73        _ITRON_Message_buffer_Translate_core_message_buffer_return_code(status);
74    }
75
76    /*
77     *  If multiprocessing were supported, this is where we would announce
78     *  the existence of the semaphore to the rest of the system.
79     */
80
81#if defined(RTEMS_MULTIPROCESSING)
82#endif
83    return E_OK;
84}
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