source: rtems/cpukit/posix/src/mqueuesetattr.c @ a0e6c73

4.115
Last change on this file since a0e6c73 was 9b4422a2, checked in by Joel Sherrill <joel.sherrill@…>, on 05/03/12 at 15:09:24

Remove All CVS Id Strings Possible Using a Script

Script does what is expected and tries to do it as
smartly as possible.

+ remove occurrences of two blank comment lines

next to each other after Id string line removed.

+ remove entire comment blocks which only exited to

contain CVS Ids

+ If the processing left a blank line at the top of

a file, it was removed.

  • Property mode set to 100644
File size: 2.3 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 *  COPYRIGHT (c) 1989-2007.
15 *  On-Line Applications Research Corporation (OAR).
16 *
17 *  The license and distribution terms for this file may be
18 *  found in the file LICENSE in this distribution or at
19 *  http://www.rtems.com/license/LICENSE.
20 */
21
22#if HAVE_CONFIG_H
23#include "config.h"
24#endif
25
26#include <stdarg.h>
27
28#include <pthread.h>
29#include <limits.h>
30#include <errno.h>
31#include <fcntl.h>
32#include <mqueue.h>
33
34#include <rtems/system.h>
35#include <rtems/score/watchdog.h>
36#include <rtems/seterr.h>
37#include <rtems/posix/mqueue.h>
38#include <rtems/posix/time.h>
39
40/*
41 *  15.2.7 Set Message Queue Attributes, P1003.1b-1993, p. 281
42 */
43
44int mq_setattr(
45  mqd_t                 mqdes,
46  const struct mq_attr *mqstat,
47  struct mq_attr       *omqstat
48)
49{
50  POSIX_Message_queue_Control_fd *the_mq_fd;
51  CORE_message_queue_Control     *the_core_mq;
52  Objects_Locations               location;
53
54  if ( !mqstat )
55    rtems_set_errno_and_return_minus_one( EINVAL );
56
57  the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
58  switch ( location ) {
59
60    case OBJECTS_LOCAL:
61
62      the_core_mq = &the_mq_fd->Queue->Message_queue;
63
64      /*
65       *  Return the old values.
66       */
67
68      if ( omqstat ) {
69        omqstat->mq_flags   = the_mq_fd->oflag;
70        omqstat->mq_msgsize = the_core_mq->maximum_message_size;
71        omqstat->mq_maxmsg  = the_core_mq->maximum_pending_messages;
72        omqstat->mq_curmsgs = the_core_mq->number_of_pending_messages;
73      }
74
75      the_mq_fd->oflag = mqstat->mq_flags;
76      _Thread_Enable_dispatch();
77      return 0;
78
79#if defined(RTEMS_MULTIPROCESSING)
80    case OBJECTS_REMOTE:
81#endif
82    case OBJECTS_ERROR:
83      break;
84  }
85
86  rtems_set_errno_and_return_minus_one( EBADF );
87}
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