source: rtems/cpukit/posix/src/mqueuetimedsend.c @ 6e97bf62

4.104.114.9
Last change on this file since 6e97bf62 was 6e97bf62, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 4, 2008 at 9:31:51 PM

2008-08-04 Joel Sherrill <joel.sherrill@…>

  • posix/src/mqueuetimedreceive.c, posix/src/mqueuetimedsend.c: Fix warnings.
  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*
2 *  NOTE:  The structure of the routines is identical to that of POSIX
3 *         Message_queues to leave the option of having unnamed message
4 *         queues at a future date.  They are currently not part of the
5 *         POSIX standard but unnamed message_queues are.  This is also
6 *         the reason for the apparently unnecessary tracking of
7 *         the process_shared attribute.  [In addition to the fact that
8 *         it would be trivial to add pshared to the mq_attr structure
9 *         and have process private message queues.]
10 *
11 *         This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open
12 *         time.
13 */
14
15/*
16 *  COPYRIGHT (c) 1989-2008.
17 *  On-Line Applications Research Corporation (OAR).
18 *
19 *  The license and distribution terms for this file may be
20 *  found in the file LICENSE in this distribution or at
21 *  http://www.rtems.com/license/LICENSE.
22 *
23 *  $Id$
24 */
25
26#if HAVE_CONFIG_H
27#include "config.h"
28#endif
29
30#include <stdarg.h>
31
32#include <pthread.h>
33#include <limits.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <mqueue.h>
37
38#include <rtems/system.h>
39#include <rtems/score/watchdog.h>
40#include <rtems/seterr.h>
41#include <rtems/posix/mqueue.h>
42#include <rtems/posix/time.h>
43
44/*PAGE
45 *
46 *  15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277
47 *
48 *  NOTE: P1003.4b/D8, p. 45 adds mq_timedsend().
49 */
50
51int mq_timedsend(
52  mqd_t                  mqdes,
53  const char            *msg_ptr,
54  size_t                 msg_len,
55  unsigned int           msg_prio,
56  const struct timespec *abstime
57)
58{
59  Watchdog_Interval ticks;
60  boolean           do_wait;
61
62  /*
63   *  POSIX requires that blocking calls with timeouts that take
64   *  an absolute timeout must ignore issues with the absolute
65   *  time provided if the operation would otherwise succeed.
66   *  So we check the abstime provided, and hold on to whether it
67   *  is valid or not.  If it isn't correct and in the future,
68   *  then we do a polling operation and convert the UNSATISFIED
69   *  status into the appropriate error.
70   */
71  switch ( _POSIX_Absolute_timeout_to_ticks( abstime, &ticks ) ) {
72    case POSIX_ABSOLUTE_TIMEOUT_INVALID:
73    case POSIX_ABSOLUTE_TIMEOUT_IS_IN_PAST:
74    case POSIX_ABSOLUTE_TIMEOUT_IS_NOW:
75      do_wait = FALSE;
76      break;
77    case POSIX_ABSOLUTE_TIMEOUT_IS_IN_FUTURE:
78    default:  /* only to silence warnings */
79      do_wait = TRUE;
80      break;
81  }
82
83  return _POSIX_Message_queue_Send_support(
84    mqdes,
85    msg_ptr,
86    msg_len,
87    msg_prio,
88    do_wait,
89    ticks
90  );
91}
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