source: rtems/cpukit/posix/src/mqueueunlink.c @ 811fae1

4.104.114.84.95
Last change on this file since 811fae1 was 4dc89814, checked in by Joel Sherrill <joel.sherrill@…>, on 11/02/99 at 17:00:35

Split mqueue.c into a variety of files.

  • Property mode set to 100644
File size: 1.9 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 *  $Id$
15 */
16
17#include <stdarg.h>
18
19#include <pthread.h>
20#include <limits.h>
21#include <errno.h>
22#include <fcntl.h>
23#include <mqueue.h>
24
25#include <rtems/system.h>
26#include <rtems/score/watchdog.h>
27#include <rtems/posix/seterr.h>
28#include <rtems/posix/mqueue.h>
29#include <rtems/posix/time.h>
30
31/*PAGE
32 *
33 *  15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276
34 */
35
36int mq_unlink(
37  const char *name
38)
39{
40  int  status;
41  register POSIX_Message_queue_Control *the_mq;
42  Objects_Id                        the_mq_id;
43  Objects_Locations                 location;
44 
45  status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id );
46 
47  if ( !status )
48    set_errno_and_return_minus_one( status );
49 
50  the_mq = _POSIX_Message_queue_Get( the_mq_id, &location );
51  switch ( location ) {
52    case OBJECTS_ERROR:
53      set_errno_and_return_minus_one( EINVAL );
54    case OBJECTS_REMOTE:
55      _Thread_Dispatch();
56      return POSIX_MP_NOT_IMPLEMENTED();
57      set_errno_and_return_minus_one( EINVAL );
58    case OBJECTS_LOCAL:
59 
60#if defined(RTEMS_MULTIPROCESSING)
61      _Objects_MP_Close(
62        &_POSIX_Message_queue_Information,
63        the_mq->Object.id
64      );
65#endif
66 
67      the_mq->linked = FALSE;
68 
69      _POSIX_Message_queue_Delete( the_mq );
70 
71      _Thread_Enable_dispatch();
72      return 0;
73  }
74  return POSIX_BOTTOM_REACHED();
75}
76
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