Bug Summary

File:/home/joel/rtems-4.11-work/build/rtems/c/src/../../cpukit/posix/src/mqueuegetattr.c
Location:line 70, column 7
Description:Value stored to 'the_mq_attr' is never read

Annotated Source Code

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: mqueuegetattr.c,v 1.12 2007/12/17 16:19:14 joel Exp $
22 */
23
24#if HAVE_CONFIG_H1
25#include "config.h"
26#endif
27
28#include <stdarg.h>
29
30#include <pthread.h>
31#include <limits.h>
32#include <errno(*__errno_location ()).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 )do { (*__errno_location ()) = (22); return -1; } while(0);
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;
Value stored to 'the_mq_attr' is never read
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 )do { (*__errno_location ()) = (9); return -1; } while(0);
88}