1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Scheduler EDF Release Job |
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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 | SCHEDULER_PRIORITY_MAP( 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 SCHEDULER_PRIORITY_UNMAP( priority & ~SCHEDULER_EDF_PRIO_MSB ); |
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37 | } |
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38 | |
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39 | void _Scheduler_EDF_Release_job( |
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40 | const Scheduler_Control *scheduler, |
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41 | Thread_Control *the_thread, |
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42 | Priority_Node *priority_node, |
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43 | uint64_t deadline, |
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44 | Thread_queue_Context *queue_context |
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45 | ) |
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46 | { |
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47 | (void) scheduler; |
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48 | |
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49 | _Thread_Wait_acquire_critical( the_thread, queue_context ); |
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50 | |
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51 | /* |
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52 | * There is no integer overflow problem here due to the |
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53 | * SCHEDULER_PRIORITY_MAP(). The deadline is in clock ticks. With the |
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54 | * minimum clock tick interval of 1us, the uptime is limited to about 146235 |
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55 | * years. |
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56 | */ |
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57 | _Priority_Node_set_priority( |
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58 | priority_node, |
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59 | SCHEDULER_PRIORITY_MAP( deadline ) |
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60 | ); |
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61 | |
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62 | if ( _Priority_Node_is_active( priority_node ) ) { |
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63 | _Thread_Priority_changed( |
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64 | the_thread, |
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65 | priority_node, |
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66 | false, |
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67 | queue_context |
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68 | ); |
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69 | } else { |
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70 | _Thread_Priority_add( the_thread, priority_node, queue_context ); |
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71 | } |
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72 | |
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73 | _Thread_Wait_release_critical( the_thread, queue_context ); |
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74 | } |
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75 | |
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76 | void _Scheduler_EDF_Cancel_job( |
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77 | const Scheduler_Control *scheduler, |
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78 | Thread_Control *the_thread, |
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79 | Priority_Node *priority_node, |
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80 | Thread_queue_Context *queue_context |
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81 | ) |
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82 | { |
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83 | (void) scheduler; |
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84 | |
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85 | _Thread_Wait_acquire_critical( the_thread, queue_context ); |
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86 | |
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87 | _Thread_Priority_remove( the_thread, priority_node, queue_context ); |
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88 | _Priority_Node_set_inactive( priority_node ); |
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89 | |
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90 | _Thread_Wait_release_critical( the_thread, queue_context ); |
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91 | } |
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