source: rtems/cpukit/rtems/src/msgqflush.c @ eaef4657

4.104.115
Last change on this file since eaef4657 was ebe61382, checked in by Joel Sherrill <joel.sherrill@…>, on 11/30/07 at 21:49:41

2007-11-30 Joel Sherrill <joel.sherrill@…>

  • rtems/src/barrierdelete.c, rtems/src/barrierrelease.c, rtems/src/barriertranslatereturncode.c, rtems/src/barrierwait.c, rtems/src/clockget.c, rtems/src/dpmemdelete.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventsend.c, rtems/src/eventtimeout.c, rtems/src/msgqbroadcast.c, rtems/src/msgqdelete.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsend.c, rtems/src/msgqurgent.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/partreturnbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatistics.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonperiod.c, rtems/src/ratemonresetstatistics.c, rtems/src/ratemontimeout.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semobtain.c, rtems/src/semrelease.c, rtems/src/semtranslatereturncode.c, rtems/src/signalsend.c, rtems/src/taskdelete.c, rtems/src/taskgetnote.c, rtems/src/taskissuspended.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksetpriority.c, rtems/src/taskstart.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/timercancel.c, rtems/src/timerdelete.c, rtems/src/timerfirewhen.c, rtems/src/timergetinfo.c, rtems/src/timerreset.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c: Restructured all code with the switch (location) pattern so that OBJECTS_LOCAL is first and we can fall into it and the OBJECTS_ERROR case breaks to a return RTEMS_INVALID_ID. This eliminates the return RTEMS_INTERNAL_ERROR at the bottom of each of these files which was unreachable and untestable code. This resulted in a code savings of approximately 20 bytes per file on the SPARC/ERC32.
  • Property mode set to 100644
File size: 2.3 KB
Line 
1/*
2 *  Message Queue Manager
3 *
4 *
5 *  COPYRIGHT (c) 1989-2007.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems/system.h>
20#include <rtems/score/sysstate.h>
21#include <rtems/score/chain.h>
22#include <rtems/score/isr.h>
23#include <rtems/score/coremsg.h>
24#include <rtems/score/object.h>
25#include <rtems/score/states.h>
26#include <rtems/score/thread.h>
27#include <rtems/score/wkspace.h>
28#if defined(RTEMS_MULTIPROCESSING)
29#include <rtems/score/mpci.h>
30#endif
31#include <rtems/rtems/status.h>
32#include <rtems/rtems/attr.h>
33#include <rtems/rtems/message.h>
34#include <rtems/rtems/options.h>
35#include <rtems/rtems/support.h>
36
37/*PAGE
38 *
39 *  rtems_message_queue_flush
40 *
41 *  This directive removes all pending messages from a queue and returns
42 *  the number of messages removed.  If no messages were present then
43 *  a count of zero is returned.
44 *
45 *  Input parameters:
46 *    id    - queue id
47 *    count - return area for count
48 *
49 *  Output parameters:
50 *    count             - number of messages removed ( 0 = empty queue )
51 *    RTEMS_SUCCESSFUL - if successful
52 *    error code        - if unsuccessful
53 */
54
55rtems_status_code rtems_message_queue_flush(
56  Objects_Id  id,
57  uint32_t   *count
58)
59{
60  register Message_queue_Control *the_message_queue;
61  Objects_Locations               location;
62
63  if ( !count )
64    return RTEMS_INVALID_ADDRESS;
65
66  the_message_queue = _Message_queue_Get( id, &location );
67  switch ( location ) {
68
69    case OBJECTS_LOCAL:
70      *count = _CORE_message_queue_Flush( &the_message_queue->message_queue );
71      _Thread_Enable_dispatch();
72      return RTEMS_SUCCESSFUL;
73
74#if defined(RTEMS_MULTIPROCESSING)
75    case OBJECTS_REMOTE:
76      _Thread_Executing->Wait.return_argument = count;
77
78      return
79        _Message_queue_MP_Send_request_packet(
80          MESSAGE_QUEUE_MP_FLUSH_REQUEST,
81          id,
82          0,                               /* buffer not used */
83          0,                               /* size */
84          0,                               /* option_set not used */
85          MPCI_DEFAULT_TIMEOUT
86        );
87#endif
88
89    case OBJECTS_ERROR:
90      break;
91  }
92
93  return RTEMS_INVALID_ID;
94}
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