source: rtems/cpukit/score/src/scheduleredfunblock.c @ b8f76fa

5
Last change on this file since b8f76fa was b8f76fa, checked in by Sebastian Huber <sebastian.huber@…>, on Jun 9, 2016 at 2:55:50 PM

score: Delete unused _Scheduler_Priority_compare()

By convention, thread priorities must be integers in RTEMS. Smaller
values represent more important threads.

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/**
2 * @file
3 *
4 * @brief Scheduler EDF Unblock
5 * @ingroup ScoreScheduler
6 */
7
8/*
9 *  Copyright (C) 2011 Petr Benes.
10 *  Copyright (C) 2011 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/score/scheduleredfimpl.h>
22#include <rtems/score/schedulerimpl.h>
23#include <rtems/score/thread.h>
24
25Scheduler_Void_or_thread _Scheduler_EDF_Unblock(
26  const Scheduler_Control *scheduler,
27  Thread_Control          *the_thread
28)
29{
30  _Scheduler_EDF_Enqueue( scheduler, the_thread );
31  /* TODO: flash critical section? */
32
33  /*
34   *  If the thread that was unblocked is more important than the heir,
35   *  then we have a new heir.  This may or may not result in a
36   *  context switch.
37   *
38   *  Normal case:
39   *    If the current thread is preemptible, then we need to do
40   *    a context switch.
41   *  Pseudo-ISR case:
42   *    Even if the thread isn't preemptible, if the new heir is
43   *    a pseudo-ISR system task, we need to do a context switch.
44   */
45  if (
46    _Scheduler_EDF_Priority_compare(
47      the_thread->current_priority,
48      _Thread_Heir->current_priority
49    ) == 1 
50  ) {
51    _Scheduler_Update_heir(
52      the_thread,
53      the_thread->current_priority == PRIORITY_PSEUDO_ISR
54    );
55  }
56
57  SCHEDULER_RETURN_VOID_OR_NULL;
58}
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