1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Scheduler EDF Extract |
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5 | * @ingroup ScoreScheduler |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright (C) 2011 Petr Benes. |
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10 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/scheduleredfimpl.h> |
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22 | |
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23 | Priority_Control _Scheduler_EDF_Map_priority( |
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24 | const Scheduler_Control *scheduler, |
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25 | Priority_Control priority |
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26 | ) |
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27 | { |
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28 | return SCHEDULER_EDF_PRIO_MSB | priority; |
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29 | } |
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30 | |
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31 | Priority_Control _Scheduler_EDF_Unmap_priority( |
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32 | const Scheduler_Control *scheduler, |
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33 | Priority_Control priority |
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34 | ) |
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35 | { |
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36 | return priority & ~SCHEDULER_EDF_PRIO_MSB; |
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37 | } |
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38 | |
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39 | Scheduler_Void_or_thread _Scheduler_EDF_Change_priority( |
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40 | const Scheduler_Control *scheduler, |
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41 | Thread_Control *the_thread, |
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42 | Priority_Control new_priority, |
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43 | bool prepend_it |
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44 | ) |
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45 | { |
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46 | Scheduler_EDF_Context *context; |
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47 | Scheduler_EDF_Node *node; |
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48 | |
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49 | context = _Scheduler_EDF_Get_context( scheduler ); |
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50 | node = _Scheduler_EDF_Thread_get_node( the_thread ); |
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51 | |
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52 | if ( ( new_priority & SCHEDULER_EDF_PRIO_MSB ) != 0 ) { |
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53 | node->background_priority = new_priority; |
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54 | } |
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55 | |
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56 | node->current_priority = new_priority; |
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57 | |
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58 | _Scheduler_EDF_Extract( context, node ); |
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59 | |
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60 | if ( prepend_it ) { |
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61 | _Scheduler_EDF_Enqueue_first( context, node, new_priority ); |
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62 | } else { |
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63 | _Scheduler_EDF_Enqueue( context, node, new_priority ); |
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64 | } |
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65 | |
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66 | _Scheduler_EDF_Schedule_body( scheduler, the_thread, false ); |
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67 | |
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68 | SCHEDULER_RETURN_VOID_OR_NULL; |
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69 | } |
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