source: rtems/cpukit/score/src/threadqrequeue.c @ 3168deaa

4.104.114.95
Last change on this file since 3168deaa was 3168deaa, checked in by Joel Sherrill <joel.sherrill@…>, on 01/22/08 at 18:28:53

2008-01-22 Joel Sherrill <joel.sherrill@…>

  • rtems/include/rtems/rtems/event.h, rtems/inline/rtems/rtems/eventset.inl, rtems/src/event.c, rtems/src/eventseize.c, rtems/src/eventsurrender.c, rtems/src/eventtimeout.c, score/Makefile.am, score/preinstall.am, score/include/rtems/score/interr.h, score/include/rtems/score/thread.h, score/include/rtems/score/threadq.h, score/include/rtems/score/tqdata.h, score/inline/rtems/score/threadq.inl, score/inline/rtems/score/tqdata.inl, score/src/threadq.c, score/src/threadqdequeue.c, score/src/threadqdequeuefifo.c, score/src/threadqdequeuepriority.c, score/src/threadqenqueue.c, score/src/threadqenqueuefifo.c, score/src/threadqenqueuepriority.c, score/src/threadqextract.c, score/src/threadqextractfifo.c, score/src/threadqextractpriority.c, score/src/threadqextractwithproxy.c, score/src/threadqfirst.c, score/src/threadqfirstfifo.c, score/src/threadqfirstpriority.c, score/src/threadqflush.c, score/src/threadqrequeue.c, score/src/threadqtimeout.c: Refactor thread queue enqueue and event blocking synchronization critical sections. This resulted in three copies of essentially the same hard to test critical section code becoming the one shared routine _Thread_blocking_operation_Cancel. In addition, the thread queue and event code now share a common synchronization enumerated type. Along the way, switches were reworked to eliminate dead code generated by gcc and comments and copyrights were updated.
  • score/include/rtems/score/threadsync.h, score/src/threadblockingoperationcancel.c: New files.
  • Property mode set to 100644
File size: 1.8 KB
Line 
1/*
2 *  Thread Queue Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-2008.
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/chain.h>
21#include <rtems/score/isr.h>
22#include <rtems/score/object.h>
23#include <rtems/score/states.h>
24#include <rtems/score/thread.h>
25#include <rtems/score/threadq.h>
26#include <rtems/score/tqdata.h>
27
28/*PAGE
29 *
30 *  _Thread_queue_Requeue
31 *
32 *  This routine is invoked when a thread changes priority and should be
33 *  moved to a different position on the thread queue.
34 *
35 *  Input parameters:
36 *    the_thread_queue - pointer to a threadq header
37 *    the_thread       - pointer to a thread control block
38 *
39 *  Output parameters: NONE
40 *
41 *  INTERRUPT LATENCY: NONE
42 */
43
44void _Thread_queue_Requeue(
45  Thread_queue_Control *the_thread_queue,
46  Thread_Control       *the_thread
47)
48{
49  /*
50   * Just in case the thread really wasn't blocked on a thread queue
51   * when we get here.
52   */
53  if ( !the_thread_queue )
54    return;
55
56  /*
57   * If queueing by FIFO, there is nothing to do. This only applies to
58   * priority blocking discipline.
59   */
60  if ( the_thread_queue->discipline == THREAD_QUEUE_DISCIPLINE_PRIORITY ) {
61    Thread_queue_Control *tq = the_thread_queue;
62    ISR_Level             level;
63    ISR_Level             level_ignored;
64
65    _ISR_Disable( level );
66    if ( _States_Is_waiting_on_thread_queue( the_thread->current_state ) ) {
67      _Thread_queue_Enter_critical_section( tq );
68      _Thread_queue_Extract_priority_helper( tq, the_thread, TRUE );
69      (void) _Thread_queue_Enqueue_priority( tq, the_thread, &level_ignored );
70    }
71    _ISR_Enable( level );
72  }
73}
74
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