1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Scheduler Priority Unblock |
---|
5 | * @ingroup ScoreScheduler |
---|
6 | */ |
---|
7 | |
---|
8 | /* |
---|
9 | * Scheduler Handler |
---|
10 | * |
---|
11 | * Copyright (C) 2010 Gedare Bloom. |
---|
12 | * Copyright (C) 2011 On-Line Applications Research Corporation (OAR). |
---|
13 | * |
---|
14 | * The license and distribution terms for this file may be |
---|
15 | * found in the file LICENSE in this distribution or at |
---|
16 | * http://www.rtems.org/license/LICENSE. |
---|
17 | */ |
---|
18 | |
---|
19 | #if HAVE_CONFIG_H |
---|
20 | #include "config.h" |
---|
21 | #endif |
---|
22 | |
---|
23 | #include <rtems/score/schedulerpriorityimpl.h> |
---|
24 | |
---|
25 | Scheduler_Void_or_thread _Scheduler_priority_Unblock ( |
---|
26 | const Scheduler_Control *scheduler, |
---|
27 | Thread_Control *the_thread |
---|
28 | ) |
---|
29 | { |
---|
30 | Scheduler_priority_Context *context = |
---|
31 | _Scheduler_priority_Get_context( scheduler ); |
---|
32 | Scheduler_priority_Node *node = _Scheduler_priority_Thread_get_node( the_thread ); |
---|
33 | |
---|
34 | _Scheduler_priority_Ready_queue_enqueue( |
---|
35 | &the_thread->Object.Node, |
---|
36 | &node->Ready_queue, |
---|
37 | &context->Bit_map |
---|
38 | ); |
---|
39 | |
---|
40 | /* TODO: flash critical section? */ |
---|
41 | |
---|
42 | /* |
---|
43 | * If the thread that was unblocked is more important than the heir, |
---|
44 | * then we have a new heir. This may or may not result in a |
---|
45 | * context switch. |
---|
46 | * |
---|
47 | * Normal case: |
---|
48 | * If the current thread is preemptible, then we need to do |
---|
49 | * a context switch. |
---|
50 | * Pseudo-ISR case: |
---|
51 | * Even if the thread isn't preemptible, if the new heir is |
---|
52 | * a pseudo-ISR system task, we need to do a context switch. |
---|
53 | */ |
---|
54 | if ( the_thread->current_priority < _Thread_Heir->current_priority ) { |
---|
55 | _Scheduler_Update_heir( |
---|
56 | the_thread, |
---|
57 | the_thread->current_priority == PRIORITY_PSEUDO_ISR |
---|
58 | ); |
---|
59 | } |
---|
60 | |
---|
61 | SCHEDULER_RETURN_VOID_OR_NULL; |
---|
62 | } |
---|