1 | /* |
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2 | * Copyright (C) 2011 Petr Benes. |
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3 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/config.h> |
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18 | #include <rtems/score/priority.h> |
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19 | #include <rtems/score/scheduler.h> |
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20 | #include <rtems/score/scheduleredf.h> |
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21 | #include <rtems/score/thread.h> |
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22 | |
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23 | void _Scheduler_EDF_Update( |
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24 | Thread_Control *the_thread |
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25 | ) |
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26 | { |
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27 | Scheduler_EDF_Per_thread *sched_info = |
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28 | (Scheduler_EDF_Per_thread*)the_thread->scheduler_info; |
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29 | RBTree_Node *the_node = &(sched_info->Node); |
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30 | |
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31 | if (sched_info->queue_state == SCHEDULER_EDF_QUEUE_STATE_NEVER_HAS_BEEN) { |
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32 | /* Shifts the priority to the region of background tasks. */ |
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33 | the_thread->Start.initial_priority |= (SCHEDULER_EDF_PRIO_MSB); |
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34 | the_thread->real_priority = the_thread->Start.initial_priority; |
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35 | the_thread->current_priority = the_thread->Start.initial_priority; |
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36 | sched_info->queue_state = SCHEDULER_EDF_QUEUE_STATE_NOT_PRESENTLY; |
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37 | } |
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38 | |
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39 | if ( sched_info->queue_state == SCHEDULER_EDF_QUEUE_STATE_YES ) { |
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40 | _RBTree_Extract(&_Scheduler_EDF_Ready_queue, the_node); |
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41 | _RBTree_Insert(&_Scheduler_EDF_Ready_queue, the_node); |
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42 | |
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43 | _Scheduler_EDF_Schedule(); |
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44 | if ( _Thread_Executing != _Thread_Heir ) { |
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45 | if ( _Thread_Executing->is_preemptible || |
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46 | the_thread->current_priority == 0 ) |
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47 | _Thread_Dispatch_necessary = true; |
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48 | } |
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49 | } |
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50 | } |
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