source: rtems/cpukit/score/src/scheduleredfreleasejob.c @ 1506658c

5
Last change on this file since 1506658c was 900d337f, checked in by Sebastian Huber <sebastian.huber@…>, on 05/05/15 at 11:05:54

score: Rework _Thread_Change_priority()

Move the writes to Thread_Control::current_priority and
Thread_Control::real_priority into _Thread_Change_priority() under the
protection of the thread lock. Add a filter function to
_Thread_Change_priority() to enable specialized variants.

Avoid race conditions during a thread priority restore with the new
Thread_Control::priority_restore_hint for an important average case
optimizations used by priority inheritance mutexes.

Update #2273.
  • Property mode set to 100644
File size: 1.1 KB
Line 
1/**
2 * @file
3 *
4 * @brief Scheduler EDF Release Job
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/scheduleredf.h>
22#include <rtems/score/threadimpl.h>
23#include <rtems/score/watchdogimpl.h>
24
25void _Scheduler_EDF_Release_job(
26  const Scheduler_Control *scheduler,
27  Thread_Control          *the_thread,
28  uint32_t                 deadline
29)
30{
31  Priority_Control new_priority;
32  Priority_Control unused;
33
34  (void) scheduler;
35
36  if (deadline) {
37    /* Initializing or shifting deadline. */
38    new_priority = (_Watchdog_Ticks_since_boot + deadline)
39                   & ~SCHEDULER_EDF_PRIO_MSB;
40  }
41  else {
42    /* Switch back to background priority. */
43    new_priority = the_thread->Start.initial_priority;
44  }
45
46  _Thread_Set_priority( the_thread, new_priority, &unused, true );
47}
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