source: rtems/cpukit/score/src/coremsgclose.c @ 02c4c441

4.11
Last change on this file since 02c4c441 was 02c4c441, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 23, 2015 at 8:01:22 AM

score: Add Thread_queue_Control::Lock

Move the complete thread queue enqueue procedure into
_Thread_queue_Enqueue_critical(). It is possible to use the thread
queue lock to protect state of the object embedding the thread queue.
This enables per object fine grained locking in the future.

Delete _Thread_queue_Enter_critical_section().

Update #2273.

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Close a Message Queue
5 *  @ingroup ScoreMessageQueue
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-1999.
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 <rtems/system.h>
22#include <rtems/score/chain.h>
23#include <rtems/score/isr.h>
24#include <rtems/score/coremsgimpl.h>
25#include <rtems/score/thread.h>
26#include <rtems/score/wkspace.h>
27
28void _CORE_message_queue_Close(
29  CORE_message_queue_Control *the_message_queue,
30  Thread_queue_Flush_callout  remote_extract_callout,
31  uint32_t                    status
32)
33{
34
35  /*
36   *  This will flush blocked threads whether they were blocked on
37   *  a send or receive.
38   */
39
40  _Thread_queue_Flush(
41    &the_message_queue->Wait_queue,
42    remote_extract_callout,
43    status
44  );
45
46  /*
47   *  This removes all messages from the pending message queue.  Since
48   *  we just flushed all waiting threads, we don't have to worry about
49   *  the flush satisfying any blocked senders as a side-effect.
50   */
51
52  if ( the_message_queue->number_of_pending_messages != 0 )
53    (void) _CORE_message_queue_Flush_support( the_message_queue );
54
55  (void) _Workspace_Free( the_message_queue->message_buffers );
56
57  _Thread_queue_Destroy( &the_message_queue->Wait_queue );
58}
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