source: rtems/cpukit/posix/src/mqueuedeletesupp.c @ 7580995

5
Last change on this file since 7580995 was 7580995, checked in by Sebastian Huber <sebastian.huber@…>, on 04/26/16 at 19:18:52

score: _CORE_message_queue_Close()

Move lock acquire to caller of _CORE_message_queue_Close() to allow
state checks during object close operations under lock protection.
Ensures deletion safety on uni-processor configuration.

  • Property mode set to 100644
File size: 1.6 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief POSIX Delete Message Queue
5 *  @ingroup POSIX_MQUEUE
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2009.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <stdarg.h>
22
23#include <pthread.h>
24#include <limits.h>
25#include <errno.h>
26#include <fcntl.h>
27#include <mqueue.h>
28
29#include <rtems/system.h>
30#include <rtems/score/watchdog.h>
31#include <rtems/score/wkspace.h>
32#include <rtems/seterr.h>
33#include <rtems/posix/mqueueimpl.h>
34#if defined(RTEMS_DEBUG)
35  #include <rtems/bspIo.h>
36#endif
37
38void _POSIX_Message_queue_Delete(
39  POSIX_Message_queue_Control *the_mq
40)
41{
42  if ( !the_mq->linked && !the_mq->open_count ) {
43      Objects_Control *the_object = &the_mq->Object;
44      ISR_lock_Context lock_context;
45
46      #if defined(RTEMS_DEBUG)
47        /*
48         *  the name memory will have been freed by unlink.
49         */
50        if ( the_object->name.name_p ) {
51          printk(
52            "POSIX MQ name (%p) not freed by unlink\n",
53            (void *)the_object->name.name_p
54          );
55          _Workspace_Free( (void *)the_object->name.name_p );
56        }
57      #endif
58
59      _CORE_message_queue_Acquire( &the_mq->Message_queue, &lock_context );
60
61      _Objects_Close( &_POSIX_Message_queue_Information, the_object );
62
63      _CORE_message_queue_Close(
64        &the_mq->Message_queue,
65        NULL,        /* no MP support */
66        0,
67        &lock_context
68      );
69
70    _POSIX_Message_queue_Free( the_mq );
71
72  }
73}
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