1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Simple SMP Scheduler API |
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5 | * |
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6 | * @ingroup ScoreSchedulerSMP |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * Copyright (c) 2013 embedded brains GmbH. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifndef _RTEMS_SCORE_SCHEDULERSIMPLE_SMP_H |
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20 | #define _RTEMS_SCORE_SCHEDULERSIMPLE_SMP_H |
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21 | |
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22 | #ifdef __cplusplus |
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23 | extern "C" { |
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24 | #endif |
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25 | |
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26 | #include <rtems/score/scheduler.h> |
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27 | #include <rtems/score/schedulerpriority.h> |
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28 | #include <rtems/score/schedulersmp.h> |
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29 | |
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30 | /** |
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31 | * @defgroup ScoreSchedulerSMP Simple SMP Scheduler |
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32 | * |
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33 | * @ingroup ScoreScheduler |
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34 | * |
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35 | * The Simple SMP Scheduler allocates a processor for the processor count |
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36 | * highest priority ready threads. The thread priority and position in the |
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37 | * ready chain are the only information to determine the scheduling decision. |
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38 | * Threads with an allocated processor are in the scheduled chain. After |
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39 | * initialization the scheduled chain has exactly processor count nodes. Each |
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40 | * processor has exactly one allocated thread after initialization. All |
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41 | * enqueue and extract operations may exchange threads with the scheduled |
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42 | * chain. One thread will be added and another will be removed. The scheduled |
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43 | * and ready chain is ordered according to the thread priority order. The |
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44 | * chain insert operations are O(count of ready threads), thus this scheduler |
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45 | * is unsuitable for most real-time applications. |
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46 | * |
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47 | * The thread preempt mode will be ignored. |
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48 | * |
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49 | * @{ |
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50 | */ |
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51 | |
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52 | /** |
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53 | * @brief Entry points for the Simple SMP Scheduler. |
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54 | */ |
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55 | #define SCHEDULER_SIMPLE_SMP_ENTRY_POINTS \ |
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56 | { \ |
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57 | _Scheduler_simple_smp_Initialize, \ |
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58 | _Scheduler_simple_smp_Schedule, \ |
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59 | _Scheduler_simple_smp_Yield, \ |
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60 | _Scheduler_simple_smp_Extract, \ |
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61 | _Scheduler_simple_smp_Enqueue_priority_fifo, \ |
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62 | _Scheduler_default_Allocate, \ |
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63 | _Scheduler_default_Free, \ |
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64 | _Scheduler_default_Update, \ |
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65 | _Scheduler_simple_smp_Enqueue_priority_fifo, \ |
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66 | _Scheduler_simple_smp_Enqueue_priority_lifo, \ |
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67 | _Scheduler_simple_smp_Extract, \ |
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68 | _Scheduler_priority_Priority_compare, \ |
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69 | _Scheduler_default_Release_job, \ |
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70 | _Scheduler_default_Tick, \ |
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71 | _Scheduler_SMP_Start_idle \ |
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72 | } |
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73 | |
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74 | void _Scheduler_simple_smp_Initialize( void ); |
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75 | |
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76 | void _Scheduler_simple_smp_Enqueue_priority_fifo( Thread_Control *thread ); |
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77 | |
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78 | void _Scheduler_simple_smp_Enqueue_priority_lifo( Thread_Control *thread ); |
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79 | |
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80 | void _Scheduler_simple_smp_Extract( Thread_Control *thread ); |
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81 | |
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82 | void _Scheduler_simple_smp_Yield( Thread_Control *thread ); |
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83 | |
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84 | void _Scheduler_simple_smp_Schedule( Thread_Control *thread ); |
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85 | |
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86 | /** @} */ |
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87 | |
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88 | #ifdef __cplusplus |
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89 | } |
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90 | #endif |
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91 | |
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92 | #endif |
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93 | /* end of include file */ |
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