source: rtems/cpukit/posix/src/mqueuegetattr.c @ 92f4671

4.104.115
Last change on this file since 92f4671 was feaa007, checked in by Joel Sherrill <joel.sherrill@…>, on 12/17/07 at 16:19:14

2007-12-17 Joel Sherrill <joel.sherrill@…>

  • posix/preinstall.am, posix/include/aio.h, posix/include/devctl.h, posix/include/mqueue.h, posix/include/sched.h, posix/include/semaphore.h, posix/include/rtems/posix/cancel.h, posix/include/rtems/posix/priority.h, posix/include/rtems/posix/psignal.h, posix/include/rtems/posix/threadsup.h, posix/include/rtems/posix/timer.h, posix/inline/rtems/posix/priority.inl, posix/src/barrierattrdestroy.c, posix/src/barrierattrgetpshared.c, posix/src/barrierattrinit.c, posix/src/barrierattrsetpshared.c, posix/src/cancel.c, posix/src/cancelrun.c, posix/src/cleanuppop.c, posix/src/cleanuppush.c, posix/src/cond.c, posix/src/condattrdestroy.c, posix/src/condattrgetpshared.c, posix/src/condattrinit.c, posix/src/condattrsetpshared.c, posix/src/condbroadcast.c, posix/src/conddefaultattributes.c, posix/src/conddestroy.c, posix/src/condinit.c, posix/src/condsignal.c, posix/src/condsignalsupp.c, posix/src/condwait.c, posix/src/condwaitsupp.c, posix/src/key.c, posix/src/keycreate.c, posix/src/keydelete.c, posix/src/keygetspecific.c, posix/src/keyrundestructors.c, posix/src/keysetspecific.c, posix/src/mqueue.c, posix/src/mqueueclose.c, posix/src/mqueuecreatesupp.c, posix/src/mqueuedeletesupp.c, posix/src/mqueuegetattr.c, posix/src/mqueuenametoid.c, posix/src/mqueuenotify.c, posix/src/mqueueopen.c, posix/src/mqueuereceive.c, posix/src/mqueuerecvsupp.c, posix/src/mqueuesend.c, posix/src/mqueuesendsupp.c, posix/src/mqueuesetattr.c, posix/src/mqueueunlink.c, posix/src/mutex.c, posix/src/mutexattrdestroy.c, posix/src/mutexattrgetprioceiling.c, posix/src/mutexattrgetprotocol.c, posix/src/mutexattrgetpshared.c, posix/src/mutexattrinit.c, posix/src/mutexattrsetprioceiling.c, posix/src/mutexattrsetprotocol.c, posix/src/mutexattrsetpshared.c, posix/src/mutexdefaultattributes.c, posix/src/mutexdestroy.c, posix/src/mutexgetprioceiling.c, posix/src/mutexlock.c, posix/src/mutexlocksupp.c, posix/src/mutexsetprioceiling.c, posix/src/mutextrylock.c, posix/src/mutexunlock.c, posix/src/psignal.c, posix/src/psignalchecksignal.c, posix/src/psignalclearprocesssignals.c, posix/src/psignalclearsignals.c, posix/src/psignalsetprocesssignals.c, posix/src/psignalunblockthread.c, posix/src/ptimer.c, posix/src/rwlockattrdestroy.c, posix/src/rwlockattrgetpshared.c, posix/src/rwlockattrinit.c, posix/src/rwlockattrsetpshared.c, posix/src/semaphore.c, posix/src/semaphoredeletesupp.c, posix/src/semaphorenametoid.c, posix/src/semaphorewaitsupp.c, posix/src/semclose.c, posix/src/semdestroy.c, posix/src/semgetvalue.c, posix/src/seminit.c, posix/src/semopen.c, posix/src/sempost.c, posix/src/semtrywait.c, posix/src/semunlink.c, posix/src/semwait.c, posix/src/setcancelstate.c, posix/src/setcanceltype.c, posix/src/sysconf.c, posix/src/testcancel.c: Add missing copyright statements.
  • 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 *  $Id$
22 */
23
24#if HAVE_CONFIG_H
25#include "config.h"
26#endif
27
28#include <stdarg.h>
29
30#include <pthread.h>
31#include <limits.h>
32#include <errno.h>
33#include <fcntl.h>
34#include <mqueue.h>
35
36#include <rtems/system.h>
37#include <rtems/score/watchdog.h>
38#include <rtems/seterr.h>
39#include <rtems/posix/mqueue.h>
40#include <rtems/posix/time.h>
41
42/*PAGE
43 *
44 *  15.2.8 Get Message Queue Attributes, P1003.1b-1993, p. 283
45 */
46
47int mq_getattr(
48  mqd_t           mqdes,
49  struct mq_attr *mqstat
50)
51{
52  POSIX_Message_queue_Control          *the_mq;
53  POSIX_Message_queue_Control_fd       *the_mq_fd;
54  Objects_Locations                     location;
55  CORE_message_queue_Attributes        *the_mq_attr;
56
57  if ( !mqstat )
58    rtems_set_errno_and_return_minus_one( EINVAL );
59
60  the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
61  switch ( location ) {
62
63    case OBJECTS_LOCAL:
64      the_mq = the_mq_fd->Queue;
65
66      /*
67       *  Return the old values.
68       */
69
70      the_mq_attr = &the_mq->Message_queue.Attributes;
71
72      mqstat->mq_flags   = the_mq_fd->oflag;
73      mqstat->mq_msgsize = the_mq->Message_queue.maximum_message_size;
74      mqstat->mq_maxmsg  = the_mq->Message_queue.maximum_pending_messages;
75      mqstat->mq_curmsgs = the_mq->Message_queue.number_of_pending_messages;
76
77      _Thread_Enable_dispatch();
78      return 0;
79
80#if defined(RTEMS_MULTIPROCESSING)
81    case OBJECTS_REMOTE:
82#endif
83    case OBJECTS_ERROR:
84      break;
85  }
86
87  rtems_set_errno_and_return_minus_one( EBADF );
88}
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