source: rtems/cpukit/score/src/schedulersimpleyield.c @ 0a97ba5b

5
Last change on this file since 0a97ba5b was 8568341, checked in by Sebastian Huber <sebastian.huber@…>, on 06/11/14 at 12:31:03

score: Need for help indicator for scheduler ops

Return a thread in need for help for the following scheduler operations

  • unblock,
  • change priority, and
  • yield.

A thread in need for help is a thread that encounters a scheduler state
change from scheduled to ready or a thread that cannot be scheduled in
an unblock operation. Such a thread can ask threads which depend on
resources owned by this thread for help.
  • Property mode set to 100644
File size: 883 bytes
Line 
1/**
2 * @file
3 *
4 * @brief Simple Schedule Yield CPU
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
23Scheduler_Void_or_thread _Scheduler_simple_Yield(
24  const Scheduler_Control *scheduler,
25  Thread_Control          *the_thread
26)
27{
28  Scheduler_simple_Context *context =
29    _Scheduler_simple_Get_context( scheduler );
30
31  _Chain_Extract_unprotected( &the_thread->Object.Node );
32  _Scheduler_simple_Insert_priority_fifo( &context->Ready, the_thread );
33  _Scheduler_simple_Schedule_body( scheduler, the_thread, false );
34
35  SCHEDULER_RETURN_VOID_OR_NULL;
36}
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