1 | /* |
---|
2 | * Copyright (c) 2014 embedded brains GmbH. All rights reserved. |
---|
3 | * |
---|
4 | * embedded brains GmbH |
---|
5 | * Dornierstr. 4 |
---|
6 | * 82178 Puchheim |
---|
7 | * Germany |
---|
8 | * <rtems@embedded-brains.de> |
---|
9 | * |
---|
10 | * The license and distribution terms for this file may be |
---|
11 | * found in the file LICENSE in this distribution or at |
---|
12 | * http://www.rtems.org/license/LICENSE. |
---|
13 | */ |
---|
14 | |
---|
15 | #if HAVE_CONFIG_H |
---|
16 | #include "config.h" |
---|
17 | #endif |
---|
18 | |
---|
19 | #include <rtems/rtems/tasksimpl.h> |
---|
20 | #include <rtems/rtems/statusimpl.h> |
---|
21 | #include <rtems/score/schedulerimpl.h> |
---|
22 | |
---|
23 | rtems_status_code rtems_task_set_scheduler( |
---|
24 | rtems_id task_id, |
---|
25 | rtems_id scheduler_id, |
---|
26 | rtems_task_priority priority |
---|
27 | ) |
---|
28 | { |
---|
29 | const Scheduler_Control *scheduler; |
---|
30 | Thread_Control *the_thread; |
---|
31 | Thread_queue_Context queue_context; |
---|
32 | ISR_lock_Context state_context; |
---|
33 | Per_CPU_Control *cpu_self; |
---|
34 | bool valid; |
---|
35 | Priority_Control core_priority; |
---|
36 | Status_Control status; |
---|
37 | |
---|
38 | scheduler = _Scheduler_Get_by_id( scheduler_id ); |
---|
39 | if ( scheduler == NULL ) { |
---|
40 | return RTEMS_INVALID_ID; |
---|
41 | } |
---|
42 | |
---|
43 | core_priority = _RTEMS_Priority_To_core( scheduler, priority, &valid ); |
---|
44 | if ( !valid ) { |
---|
45 | return RTEMS_INVALID_PRIORITY; |
---|
46 | } |
---|
47 | |
---|
48 | _Thread_queue_Context_initialize( &queue_context ); |
---|
49 | the_thread = _Thread_Get( task_id, &queue_context.Lock_context.Lock_context ); |
---|
50 | |
---|
51 | if ( the_thread == NULL ) { |
---|
52 | #if defined(RTEMS_MULTIPROCESSING) |
---|
53 | if ( _Thread_MP_Is_remote( task_id ) ) { |
---|
54 | return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; |
---|
55 | } |
---|
56 | #endif |
---|
57 | |
---|
58 | return RTEMS_INVALID_ID; |
---|
59 | } |
---|
60 | |
---|
61 | cpu_self = _Thread_queue_Dispatch_disable( &queue_context ); |
---|
62 | _Thread_Wait_acquire_critical( the_thread, &queue_context ); |
---|
63 | _Thread_State_acquire_critical( the_thread, &state_context ); |
---|
64 | |
---|
65 | status = _Scheduler_Set( scheduler, the_thread, core_priority ); |
---|
66 | |
---|
67 | _Thread_State_release_critical( the_thread, &state_context ); |
---|
68 | _Thread_Wait_release( the_thread, &queue_context ); |
---|
69 | _Thread_Dispatch_enable( cpu_self ); |
---|
70 | return _Status_Get( status ); |
---|
71 | } |
---|