source: rtems/cpukit/score/src/schedulersimpleunblock.c @ e1598a6

4.115
Last change on this file since e1598a6 was e1598a6, checked in by Sebastian Huber <sebastian.huber@…>, on 04/04/14 at 08:56:36

score: Static scheduler configuration

Do not allocate the scheduler control structures from the workspace.
This is a preparation step for configuration of clustered/partitioned
schedulers on SMP.

  • Property mode set to 100644
File size: 1.3 KB
Line 
1/**
2 * @file
3 *
4 * @brief Scheduler Simple Handler / Unblock
5 * @ingroup ScoreScheduler
6 */
7
8/*
9 *  COPYRIGHT (c) 2011.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in 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/schedulersimpleimpl.h>
22#include <rtems/score/thread.h>
23
24void _Scheduler_simple_Unblock(
25  const Scheduler_Control *scheduler,
26  Thread_Control          *the_thread
27)
28{
29  _Scheduler_simple_Ready_queue_enqueue( scheduler, the_thread );
30
31  /*
32   *  If the thread that was unblocked is more important than the heir,
33   *  then we have a new heir.  This may or may not result in a
34   *  context switch.
35   *
36   *  Normal case:
37   *    If the current thread is preemptible, then we need to do
38   *    a context switch.
39   *  Pseudo-ISR case:
40   *    Even if the thread isn't preemptible, if the new heir is
41   *    a pseudo-ISR system task, we need to do a context switch.
42   */
43  if ( the_thread->current_priority < _Thread_Heir->current_priority ) {
44    _Thread_Heir = the_thread;
45    if ( _Thread_Executing->is_preemptible ||
46        the_thread->current_priority == 0 )
47      _Thread_Dispatch_necessary = true;
48  }
49}
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