1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup ScoreMutex |
---|
5 | * |
---|
6 | * @brief CORE Mutex Implementation |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * COPYRIGHT (c) 1989-2009. |
---|
11 | * On-Line Applications Research Corporation (OAR). |
---|
12 | * |
---|
13 | * The license and distribution terms for this file may be |
---|
14 | * found in the file LICENSE in this distribution or at |
---|
15 | * http://www.rtems.org/license/LICENSE. |
---|
16 | */ |
---|
17 | |
---|
18 | #ifndef _RTEMS_SCORE_COREMUTEXIMPL_H |
---|
19 | #define _RTEMS_SCORE_COREMUTEXIMPL_H |
---|
20 | |
---|
21 | #include <rtems/score/coremutex.h> |
---|
22 | #include <rtems/score/chainimpl.h> |
---|
23 | #include <rtems/score/schedulerimpl.h> |
---|
24 | #include <rtems/score/status.h> |
---|
25 | #include <rtems/score/threadimpl.h> |
---|
26 | #include <rtems/score/threadqimpl.h> |
---|
27 | |
---|
28 | #ifdef __cplusplus |
---|
29 | extern "C" { |
---|
30 | #endif |
---|
31 | |
---|
32 | /** |
---|
33 | * @addtogroup ScoreMutex |
---|
34 | */ |
---|
35 | /**@{**/ |
---|
36 | |
---|
37 | #define CORE_MUTEX_TQ_OPERATIONS &_Thread_queue_Operations_priority |
---|
38 | |
---|
39 | #define CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS \ |
---|
40 | &_Thread_queue_Operations_priority_inherit |
---|
41 | |
---|
42 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Initialize( |
---|
43 | CORE_mutex_Control *the_mutex |
---|
44 | ) |
---|
45 | { |
---|
46 | _Thread_queue_Initialize( &the_mutex->Wait_queue ); |
---|
47 | } |
---|
48 | |
---|
49 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Destroy( CORE_mutex_Control *the_mutex ) |
---|
50 | { |
---|
51 | _Thread_queue_Destroy( &the_mutex->Wait_queue ); |
---|
52 | } |
---|
53 | |
---|
54 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Acquire_critical( |
---|
55 | CORE_mutex_Control *the_mutex, |
---|
56 | Thread_queue_Context *queue_context |
---|
57 | ) |
---|
58 | { |
---|
59 | _Thread_queue_Acquire_critical( &the_mutex->Wait_queue, queue_context ); |
---|
60 | } |
---|
61 | |
---|
62 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Release( |
---|
63 | CORE_mutex_Control *the_mutex, |
---|
64 | Thread_queue_Context *queue_context |
---|
65 | ) |
---|
66 | { |
---|
67 | _Thread_queue_Release( &the_mutex->Wait_queue, queue_context ); |
---|
68 | } |
---|
69 | |
---|
70 | RTEMS_INLINE_ROUTINE Thread_Control *_CORE_mutex_Get_owner( |
---|
71 | const CORE_mutex_Control *the_mutex |
---|
72 | ) |
---|
73 | { |
---|
74 | return the_mutex->Wait_queue.Queue.owner; |
---|
75 | } |
---|
76 | |
---|
77 | /** |
---|
78 | * @brief Is mutex locked. |
---|
79 | * |
---|
80 | * This routine returns true if the mutex specified is locked and false |
---|
81 | * otherwise. |
---|
82 | * |
---|
83 | * @param[in] the_mutex is the mutex to check. |
---|
84 | * |
---|
85 | * @retval true The mutex is locked. |
---|
86 | * @retval false The mutex is not locked. |
---|
87 | */ |
---|
88 | RTEMS_INLINE_ROUTINE bool _CORE_mutex_Is_locked( |
---|
89 | const CORE_mutex_Control *the_mutex |
---|
90 | ) |
---|
91 | { |
---|
92 | return _CORE_mutex_Get_owner( the_mutex ) != NULL; |
---|
93 | } |
---|
94 | |
---|
95 | Status_Control _CORE_mutex_Seize_slow( |
---|
96 | CORE_mutex_Control *the_mutex, |
---|
97 | Thread_Control *executing, |
---|
98 | Thread_Control *owner, |
---|
99 | bool wait, |
---|
100 | Thread_queue_Context *queue_context |
---|
101 | ); |
---|
102 | |
---|
103 | Status_Control _CORE_mutex_Seize_no_protocol_slow( |
---|
104 | CORE_mutex_Control *the_mutex, |
---|
105 | const Thread_queue_Operations *operations, |
---|
106 | Thread_Control *executing, |
---|
107 | bool wait, |
---|
108 | Thread_queue_Context *queue_context |
---|
109 | ); |
---|
110 | |
---|
111 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Set_owner( |
---|
112 | CORE_mutex_Control *the_mutex, |
---|
113 | Thread_Control *owner |
---|
114 | ) |
---|
115 | { |
---|
116 | the_mutex->Wait_queue.Queue.owner = owner; |
---|
117 | } |
---|
118 | |
---|
119 | RTEMS_INLINE_ROUTINE bool _CORE_mutex_Is_owner( |
---|
120 | const CORE_mutex_Control *the_mutex, |
---|
121 | const Thread_Control *the_thread |
---|
122 | ) |
---|
123 | { |
---|
124 | return _CORE_mutex_Get_owner( the_mutex ) == the_thread; |
---|
125 | } |
---|
126 | |
---|
127 | RTEMS_INLINE_ROUTINE void _CORE_mutex_Restore_priority( |
---|
128 | Thread_Control *executing |
---|
129 | ) |
---|
130 | { |
---|
131 | /* |
---|
132 | * Whether or not someone is waiting for the mutex, an |
---|
133 | * inherited priority must be lowered if this is the last |
---|
134 | * mutex (i.e. resource) this task has. |
---|
135 | */ |
---|
136 | if ( !_Thread_Owns_resources( executing ) ) { |
---|
137 | /* |
---|
138 | * Ensure that the executing resource count is visible to all other |
---|
139 | * processors and that we read the latest priority restore hint. |
---|
140 | */ |
---|
141 | _Atomic_Fence( ATOMIC_ORDER_ACQ_REL ); |
---|
142 | |
---|
143 | if ( executing->priority_restore_hint ) { |
---|
144 | Per_CPU_Control *cpu_self; |
---|
145 | |
---|
146 | cpu_self = _Thread_Dispatch_disable(); |
---|
147 | _Thread_Restore_priority( executing ); |
---|
148 | _Thread_Dispatch_enable( cpu_self ); |
---|
149 | } |
---|
150 | } |
---|
151 | } |
---|
152 | |
---|
153 | RTEMS_INLINE_ROUTINE void _CORE_recursive_mutex_Initialize( |
---|
154 | CORE_recursive_mutex_Control *the_mutex |
---|
155 | ) |
---|
156 | { |
---|
157 | _CORE_mutex_Initialize( &the_mutex->Mutex ); |
---|
158 | the_mutex->nest_level = 0; |
---|
159 | } |
---|
160 | |
---|
161 | RTEMS_INLINE_ROUTINE Status_Control _CORE_recursive_mutex_Seize_nested( |
---|
162 | CORE_recursive_mutex_Control *the_mutex |
---|
163 | ) |
---|
164 | { |
---|
165 | ++the_mutex->nest_level; |
---|
166 | return STATUS_SUCCESSFUL; |
---|
167 | } |
---|
168 | |
---|
169 | RTEMS_INLINE_ROUTINE Status_Control _CORE_recursive_mutex_Seize( |
---|
170 | CORE_recursive_mutex_Control *the_mutex, |
---|
171 | Thread_Control *executing, |
---|
172 | bool wait, |
---|
173 | Status_Control ( *nested )( CORE_recursive_mutex_Control * ), |
---|
174 | Thread_queue_Context *queue_context |
---|
175 | ) |
---|
176 | { |
---|
177 | Thread_Control *owner; |
---|
178 | |
---|
179 | _CORE_mutex_Acquire_critical( &the_mutex->Mutex, queue_context ); |
---|
180 | |
---|
181 | owner = _CORE_mutex_Get_owner( &the_mutex->Mutex ); |
---|
182 | |
---|
183 | if ( owner == NULL ) { |
---|
184 | _CORE_mutex_Set_owner( &the_mutex->Mutex, executing ); |
---|
185 | ++executing->resource_count; |
---|
186 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
187 | return STATUS_SUCCESSFUL; |
---|
188 | } |
---|
189 | |
---|
190 | if ( owner == executing ) { |
---|
191 | Status_Control status; |
---|
192 | |
---|
193 | status = ( *nested )( the_mutex ); |
---|
194 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
195 | return status; |
---|
196 | } |
---|
197 | |
---|
198 | return _CORE_mutex_Seize_slow( |
---|
199 | &the_mutex->Mutex, |
---|
200 | executing, |
---|
201 | owner, |
---|
202 | wait, |
---|
203 | queue_context |
---|
204 | ); |
---|
205 | } |
---|
206 | |
---|
207 | RTEMS_INLINE_ROUTINE Status_Control _CORE_recursive_mutex_Surrender( |
---|
208 | CORE_recursive_mutex_Control *the_mutex, |
---|
209 | Thread_Control *executing, |
---|
210 | Thread_queue_Context *queue_context |
---|
211 | ) |
---|
212 | { |
---|
213 | unsigned int nest_level; |
---|
214 | Thread_queue_Heads *heads; |
---|
215 | bool keep_priority; |
---|
216 | |
---|
217 | _CORE_mutex_Acquire_critical( &the_mutex->Mutex, queue_context ); |
---|
218 | |
---|
219 | if ( !_CORE_mutex_Is_owner( &the_mutex->Mutex, executing ) ) { |
---|
220 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
221 | return STATUS_NOT_OWNER; |
---|
222 | } |
---|
223 | |
---|
224 | nest_level = the_mutex->nest_level; |
---|
225 | |
---|
226 | if ( nest_level > 0 ) { |
---|
227 | the_mutex->nest_level = nest_level - 1; |
---|
228 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
229 | return STATUS_SUCCESSFUL; |
---|
230 | } |
---|
231 | |
---|
232 | --executing->resource_count; |
---|
233 | _CORE_mutex_Set_owner( &the_mutex->Mutex, NULL ); |
---|
234 | |
---|
235 | /* |
---|
236 | * Ensure that the owner resource count is visible to all other |
---|
237 | * processors and that we read the latest priority restore |
---|
238 | * hint. |
---|
239 | */ |
---|
240 | _Atomic_Fence( ATOMIC_ORDER_ACQ_REL ); |
---|
241 | |
---|
242 | heads = the_mutex->Mutex.Wait_queue.Queue.heads; |
---|
243 | keep_priority = _Thread_Owns_resources( executing ) |
---|
244 | || !executing->priority_restore_hint; |
---|
245 | |
---|
246 | if ( heads == NULL && keep_priority ) { |
---|
247 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
248 | return STATUS_SUCCESSFUL; |
---|
249 | } |
---|
250 | |
---|
251 | _Thread_queue_Surrender( |
---|
252 | &the_mutex->Mutex.Wait_queue.Queue, |
---|
253 | CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS, |
---|
254 | heads, |
---|
255 | executing, |
---|
256 | keep_priority, |
---|
257 | queue_context |
---|
258 | ); |
---|
259 | return STATUS_SUCCESSFUL; |
---|
260 | } |
---|
261 | |
---|
262 | RTEMS_INLINE_ROUTINE Status_Control _CORE_recursive_mutex_Seize_no_protocol( |
---|
263 | CORE_recursive_mutex_Control *the_mutex, |
---|
264 | const Thread_queue_Operations *operations, |
---|
265 | Thread_Control *executing, |
---|
266 | bool wait, |
---|
267 | Status_Control ( *nested )( CORE_recursive_mutex_Control * ), |
---|
268 | Thread_queue_Context *queue_context |
---|
269 | ) |
---|
270 | { |
---|
271 | Thread_Control *owner; |
---|
272 | |
---|
273 | _CORE_mutex_Acquire_critical( &the_mutex->Mutex, queue_context ); |
---|
274 | |
---|
275 | owner = _CORE_mutex_Get_owner( &the_mutex->Mutex ); |
---|
276 | |
---|
277 | if ( owner == NULL ) { |
---|
278 | _CORE_mutex_Set_owner( &the_mutex->Mutex, executing ); |
---|
279 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
280 | return STATUS_SUCCESSFUL; |
---|
281 | } |
---|
282 | |
---|
283 | if ( owner == executing ) { |
---|
284 | Status_Control status; |
---|
285 | |
---|
286 | status = ( *nested )( the_mutex ); |
---|
287 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
288 | return status; |
---|
289 | } |
---|
290 | |
---|
291 | return _CORE_mutex_Seize_no_protocol_slow( |
---|
292 | &the_mutex->Mutex, |
---|
293 | operations, |
---|
294 | executing, |
---|
295 | wait, |
---|
296 | queue_context |
---|
297 | ); |
---|
298 | } |
---|
299 | |
---|
300 | RTEMS_INLINE_ROUTINE Status_Control _CORE_recursive_mutex_Surrender_no_protocol( |
---|
301 | CORE_recursive_mutex_Control *the_mutex, |
---|
302 | const Thread_queue_Operations *operations, |
---|
303 | Thread_Control *executing, |
---|
304 | Thread_queue_Context *queue_context |
---|
305 | ) |
---|
306 | { |
---|
307 | unsigned int nest_level; |
---|
308 | Thread_Control *new_owner; |
---|
309 | |
---|
310 | _CORE_mutex_Acquire_critical( &the_mutex->Mutex, queue_context ); |
---|
311 | |
---|
312 | if ( !_CORE_mutex_Is_owner( &the_mutex->Mutex, executing ) ) { |
---|
313 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
314 | return STATUS_NOT_OWNER; |
---|
315 | } |
---|
316 | |
---|
317 | nest_level = the_mutex->nest_level; |
---|
318 | |
---|
319 | if ( nest_level > 0 ) { |
---|
320 | the_mutex->nest_level = nest_level - 1; |
---|
321 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
322 | return STATUS_SUCCESSFUL; |
---|
323 | } |
---|
324 | |
---|
325 | new_owner = _Thread_queue_First_locked( |
---|
326 | &the_mutex->Mutex.Wait_queue, |
---|
327 | operations |
---|
328 | ); |
---|
329 | _CORE_mutex_Set_owner( &the_mutex->Mutex, new_owner ); |
---|
330 | |
---|
331 | if ( new_owner == NULL ) { |
---|
332 | _CORE_mutex_Release( &the_mutex->Mutex, queue_context ); |
---|
333 | return STATUS_SUCCESSFUL; |
---|
334 | } |
---|
335 | |
---|
336 | _Thread_queue_Extract_critical( |
---|
337 | &the_mutex->Mutex.Wait_queue.Queue, |
---|
338 | operations, |
---|
339 | new_owner, |
---|
340 | queue_context |
---|
341 | ); |
---|
342 | return STATUS_SUCCESSFUL; |
---|
343 | } |
---|
344 | |
---|
345 | RTEMS_INLINE_ROUTINE void _CORE_ceiling_mutex_Initialize( |
---|
346 | CORE_ceiling_mutex_Control *the_mutex, |
---|
347 | const Scheduler_Control *scheduler, |
---|
348 | Priority_Control priority_ceiling |
---|
349 | ) |
---|
350 | { |
---|
351 | _CORE_recursive_mutex_Initialize( &the_mutex->Recursive ); |
---|
352 | the_mutex->priority_ceiling = priority_ceiling; |
---|
353 | #if defined(RTEMS_SMP) |
---|
354 | the_mutex->scheduler = scheduler; |
---|
355 | #endif |
---|
356 | } |
---|
357 | |
---|
358 | RTEMS_INLINE_ROUTINE const Scheduler_Control * |
---|
359 | _CORE_ceiling_mutex_Get_scheduler( |
---|
360 | const CORE_ceiling_mutex_Control *the_mutex |
---|
361 | ) |
---|
362 | { |
---|
363 | #if defined(RTEMS_SMP) |
---|
364 | return the_mutex->scheduler; |
---|
365 | #else |
---|
366 | return _Scheduler_Get_by_CPU_index( 0 ); |
---|
367 | #endif |
---|
368 | } |
---|
369 | |
---|
370 | RTEMS_INLINE_ROUTINE void _CORE_ceiling_mutex_Set_priority( |
---|
371 | CORE_ceiling_mutex_Control *the_mutex, |
---|
372 | Priority_Control priority_ceiling |
---|
373 | ) |
---|
374 | { |
---|
375 | the_mutex->priority_ceiling = priority_ceiling; |
---|
376 | } |
---|
377 | |
---|
378 | RTEMS_INLINE_ROUTINE Priority_Control _CORE_ceiling_mutex_Get_priority( |
---|
379 | const CORE_ceiling_mutex_Control *the_mutex |
---|
380 | ) |
---|
381 | { |
---|
382 | return the_mutex->priority_ceiling; |
---|
383 | } |
---|
384 | |
---|
385 | RTEMS_INLINE_ROUTINE Status_Control _CORE_ceiling_mutex_Set_owner( |
---|
386 | CORE_ceiling_mutex_Control *the_mutex, |
---|
387 | Thread_Control *owner, |
---|
388 | Thread_queue_Context *queue_context |
---|
389 | ) |
---|
390 | { |
---|
391 | Priority_Control priority_ceiling; |
---|
392 | Priority_Control current_priority; |
---|
393 | Per_CPU_Control *cpu_self; |
---|
394 | |
---|
395 | priority_ceiling = the_mutex->priority_ceiling; |
---|
396 | current_priority = owner->current_priority; |
---|
397 | |
---|
398 | if ( current_priority < priority_ceiling ) { |
---|
399 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
400 | return STATUS_MUTEX_CEILING_VIOLATED; |
---|
401 | } |
---|
402 | |
---|
403 | _CORE_mutex_Set_owner( &the_mutex->Recursive.Mutex, owner ); |
---|
404 | ++owner->resource_count; |
---|
405 | |
---|
406 | if ( current_priority == priority_ceiling ) { |
---|
407 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
408 | return STATUS_SUCCESSFUL; |
---|
409 | } |
---|
410 | |
---|
411 | cpu_self = _Thread_Dispatch_disable_critical( |
---|
412 | &queue_context->Lock_context.Lock_context |
---|
413 | ); |
---|
414 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
415 | _Thread_Raise_priority( owner, priority_ceiling ); |
---|
416 | _Thread_Dispatch_enable( cpu_self ); |
---|
417 | return STATUS_SUCCESSFUL; |
---|
418 | } |
---|
419 | |
---|
420 | RTEMS_INLINE_ROUTINE Status_Control _CORE_ceiling_mutex_Seize( |
---|
421 | CORE_ceiling_mutex_Control *the_mutex, |
---|
422 | Thread_Control *executing, |
---|
423 | bool wait, |
---|
424 | Status_Control ( *nested )( CORE_recursive_mutex_Control * ), |
---|
425 | Thread_queue_Context *queue_context |
---|
426 | ) |
---|
427 | { |
---|
428 | Thread_Control *owner; |
---|
429 | |
---|
430 | _CORE_mutex_Acquire_critical( &the_mutex->Recursive.Mutex, queue_context ); |
---|
431 | |
---|
432 | owner = _CORE_mutex_Get_owner( &the_mutex->Recursive.Mutex ); |
---|
433 | |
---|
434 | if ( owner == NULL ) { |
---|
435 | #if defined(RTEMS_SMP) |
---|
436 | if ( |
---|
437 | _Scheduler_Get_own( executing ) |
---|
438 | != _CORE_ceiling_mutex_Get_scheduler( the_mutex ) |
---|
439 | ) { |
---|
440 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
441 | return STATUS_NOT_DEFINED; |
---|
442 | } |
---|
443 | #endif |
---|
444 | |
---|
445 | return _CORE_ceiling_mutex_Set_owner( |
---|
446 | the_mutex, |
---|
447 | executing, |
---|
448 | queue_context |
---|
449 | ); |
---|
450 | } |
---|
451 | |
---|
452 | if ( owner == executing ) { |
---|
453 | Status_Control status; |
---|
454 | |
---|
455 | status = ( *nested )( &the_mutex->Recursive ); |
---|
456 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
457 | return status; |
---|
458 | } |
---|
459 | |
---|
460 | return _CORE_mutex_Seize_no_protocol_slow( |
---|
461 | &the_mutex->Recursive.Mutex, |
---|
462 | CORE_MUTEX_TQ_OPERATIONS, |
---|
463 | executing, |
---|
464 | wait, |
---|
465 | queue_context |
---|
466 | ); |
---|
467 | } |
---|
468 | |
---|
469 | RTEMS_INLINE_ROUTINE Status_Control _CORE_ceiling_mutex_Surrender( |
---|
470 | CORE_ceiling_mutex_Control *the_mutex, |
---|
471 | Thread_Control *executing, |
---|
472 | Thread_queue_Context *queue_context |
---|
473 | ) |
---|
474 | { |
---|
475 | unsigned int nest_level; |
---|
476 | Thread_Control *new_owner; |
---|
477 | |
---|
478 | _CORE_mutex_Acquire_critical( &the_mutex->Recursive.Mutex, queue_context ); |
---|
479 | |
---|
480 | if ( !_CORE_mutex_Is_owner( &the_mutex->Recursive.Mutex, executing ) ) { |
---|
481 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
482 | return STATUS_NOT_OWNER; |
---|
483 | } |
---|
484 | |
---|
485 | nest_level = the_mutex->Recursive.nest_level; |
---|
486 | |
---|
487 | if ( nest_level > 0 ) { |
---|
488 | the_mutex->Recursive.nest_level = nest_level - 1; |
---|
489 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
490 | return STATUS_SUCCESSFUL; |
---|
491 | } |
---|
492 | |
---|
493 | --executing->resource_count; |
---|
494 | |
---|
495 | new_owner = _Thread_queue_First_locked( |
---|
496 | &the_mutex->Recursive.Mutex.Wait_queue, |
---|
497 | CORE_MUTEX_TQ_OPERATIONS |
---|
498 | ); |
---|
499 | _CORE_mutex_Set_owner( &the_mutex->Recursive.Mutex, new_owner ); |
---|
500 | |
---|
501 | if ( new_owner != NULL ) { |
---|
502 | bool unblock; |
---|
503 | |
---|
504 | /* |
---|
505 | * We must extract the thread now since this will restore its default |
---|
506 | * thread lock. This is necessary to avoid a deadlock in the |
---|
507 | * _Thread_Change_priority() below due to a recursive thread queue lock |
---|
508 | * acquire. |
---|
509 | */ |
---|
510 | unblock = _Thread_queue_Extract_locked( |
---|
511 | &the_mutex->Recursive.Mutex.Wait_queue.Queue, |
---|
512 | CORE_MUTEX_TQ_OPERATIONS, |
---|
513 | new_owner, |
---|
514 | queue_context |
---|
515 | ); |
---|
516 | |
---|
517 | #if defined(RTEMS_MULTIPROCESSING) |
---|
518 | if ( _Objects_Is_local_id( new_owner->Object.id ) ) |
---|
519 | #endif |
---|
520 | { |
---|
521 | ++new_owner->resource_count; |
---|
522 | _Thread_Raise_priority( new_owner, the_mutex->priority_ceiling ); |
---|
523 | } |
---|
524 | |
---|
525 | _Thread_queue_Unblock_critical( |
---|
526 | unblock, |
---|
527 | &the_mutex->Recursive.Mutex.Wait_queue.Queue, |
---|
528 | new_owner, |
---|
529 | &queue_context->Lock_context.Lock_context |
---|
530 | ); |
---|
531 | } else { |
---|
532 | _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context ); |
---|
533 | } |
---|
534 | |
---|
535 | _CORE_mutex_Restore_priority( executing ); |
---|
536 | return STATUS_SUCCESSFUL; |
---|
537 | } |
---|
538 | |
---|
539 | /** @} */ |
---|
540 | |
---|
541 | #ifdef __cplusplus |
---|
542 | } |
---|
543 | #endif |
---|
544 | |
---|
545 | #endif |
---|
546 | /* end of include file */ |
---|