source: rtems/cpukit/posix/src/mqueueunlink.c @ a148f56

4.104.114.84.95
Last change on this file since a148f56 was a148f56, checked in by Joel Sherrill <joel.sherrill@…>, on 01/04/00 at 14:00:38

Removed warnings.

  • Property mode set to 100644
File size: 2.0 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 
44  _Thread_Disable_dispatch();
45
46  status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id );
47   if ( status != 0 ) {
48    _Thread_Enable_dispatch();
49    set_errno_and_return_minus_one( status );
50   }
51
52  /*
53   *  Don't support unlinking a remote message queue.
54   */
55
56  if ( !_Objects_Is_local_id(the_mq_id) ) {
57    _Thread_Enable_dispatch();
58    set_errno_and_return_minus_one( ENOSYS );
59  }
60
61  the_mq = (POSIX_Message_queue_Control *) _Objects_Get_local_object(
62    &_POSIX_Message_queue_Information,
63    _Objects_Get_index( the_mq_id )
64  );
65 
66#if defined(RTEMS_MULTIPROCESSING)
67  if ( the_mq->process_shared == PTHREAD_PROCESS_SHARED ) {
68    _Objects_MP_Close( &_POSIX_Message_queue_Information, the_mq_id );
69  }
70#endif
71
72 
73  the_mq->linked = FALSE;
74  _POSIX_Message_queue_Namespace_remove( the_mq );
75  _POSIX_Message_queue_Delete( the_mq );
76
77  _Thread_Enable_dispatch();
78  return 0;
79}
80
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