source: rtems/cpukit/score/src/schedulerpriorityunblock.c @ 25f5730f

4.11
Last change on this file since 25f5730f was beab7329, checked in by Sebastian Huber <sebastian.huber@…>, on May 13, 2014 at 2:03:05 PM

score: Introduce scheduler nodes

Rename scheduler per-thread information into scheduler nodes using
Scheduler_Node as the base type. Use inheritance for specialized
schedulers.

Move the scheduler specific states from the thread control block into
the scheduler node structure.

Validate the SMP scheduler node state transitions in case RTEMS_DEBUG is
defined.

  • Property mode set to 100644
File size: 1.6 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Scheduler Priority Unblock
5 *  @ingroup ScoreScheduler
6 */
7
8/*
9 *  Scheduler Handler
10 *
11 *  Copyright (C) 2010 Gedare Bloom.
12 *  Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
13 *
14 *  The license and distribution terms for this file may be
15 *  found in the file LICENSE in this distribution or at
16 *  http://www.rtems.org/license/LICENSE.
17 */
18
19#if HAVE_CONFIG_H
20#include "config.h"
21#endif
22
23#include <rtems/score/schedulerpriorityimpl.h>
24
25void _Scheduler_priority_Unblock (
26  const Scheduler_Control *scheduler,
27  Thread_Control          *the_thread
28)
29{
30  Scheduler_priority_Context *context =
31    _Scheduler_priority_Get_context( scheduler );
32  Scheduler_priority_Node *node = _Scheduler_priority_Node_get( the_thread );
33
34  _Scheduler_priority_Ready_queue_enqueue(
35    the_thread,
36    &node->Ready_queue,
37    &context->Bit_map
38  );
39
40  /* TODO: flash critical section? */
41
42  /*
43   *  If the thread that was unblocked is more important than the heir,
44   *  then we have a new heir.  This may or may not result in a
45   *  context switch.
46   *
47   *  Normal case:
48   *    If the current thread is preemptible, then we need to do
49   *    a context switch.
50   *  Pseudo-ISR case:
51   *    Even if the thread isn't preemptible, if the new heir is
52   *    a pseudo-ISR system task, we need to do a context switch.
53   */
54  if ( the_thread->current_priority < _Thread_Heir->current_priority ) {
55    _Thread_Heir = the_thread;
56    if ( _Thread_Executing->is_preemptible ||
57        the_thread->current_priority == 0 )
58      _Thread_Dispatch_necessary = true;
59  }
60}
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