[355ee7d] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @brief Scheduler Priority Unblock |
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| 5 | * @ingroup ScoreScheduler |
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| 6 | */ |
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| 7 | |
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[0faa9dad] | 8 | /* |
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| 9 | * Scheduler Handler |
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| 10 | * |
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| 11 | * Copyright (C) 2010 Gedare Bloom. |
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[010192d] | 12 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
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[0faa9dad] | 13 | * |
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| 14 | * The license and distribution terms for this file may be |
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[dcf3687] | 15 | * found in the file LICENSE in this distribution or at |
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[0faa9dad] | 16 | * http://www.rtems.com/license/LICENSE. |
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| 17 | */ |
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| 18 | |
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| 19 | #if HAVE_CONFIG_H |
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| 20 | #include "config.h" |
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| 21 | #endif |
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| 22 | |
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| 23 | #include <rtems/system.h> |
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| 24 | #include <rtems/score/scheduler.h> |
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| 25 | #include <rtems/score/schedulerpriority.h> |
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| 26 | |
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| 27 | void _Scheduler_priority_Unblock ( |
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| 28 | Thread_Control *the_thread |
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| 29 | ) |
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| 30 | { |
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[108c4b0] | 31 | _Scheduler_priority_Ready_queue_enqueue(the_thread); |
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| 32 | |
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| 33 | /* TODO: flash critical section? */ |
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| 34 | |
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| 35 | /* |
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| 36 | * If the thread that was unblocked is more important than the heir, |
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| 37 | * then we have a new heir. This may or may not result in a |
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| 38 | * context switch. |
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| 39 | * |
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| 40 | * Normal case: |
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| 41 | * If the current thread is preemptible, then we need to do |
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| 42 | * a context switch. |
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| 43 | * Pseudo-ISR case: |
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| 44 | * Even if the thread isn't preemptible, if the new heir is |
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| 45 | * a pseudo-ISR system task, we need to do a context switch. |
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| 46 | */ |
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| 47 | if ( the_thread->current_priority < _Thread_Heir->current_priority ) { |
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| 48 | _Thread_Heir = the_thread; |
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| 49 | if ( _Thread_Executing->is_preemptible || |
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| 50 | the_thread->current_priority == 0 ) |
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| 51 | _Thread_Dispatch_necessary = true; |
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| 52 | } |
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[0faa9dad] | 53 | } |
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