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mutex.c@ 61

Last change on this file since 61 was 61, checked in by ertl-honda, 11 years ago
ASP for EWARM のコミット．
File size: 14.0 KB

Line
1	/*
2	* TOPPERS/ASP Kernel
3	* Toyohashi Open Platform for Embedded Real-Time Systems/
4	* Advanced Standard Profile Kernel
5	*
6	* Copyright (C) 2005-2009 by Embedded and Real-Time Systems Laboratory
7	* Graduate School of Information Science, Nagoya Univ., JAPAN
8	*
9	* ãLì ÒÍCÈºÌ(1)`(4)Ìðð½·êÉÀèC{\tgEF
10	* Ai{\tgEFAðüÏµ½àÌðÜÞDÈº¯¶jðgpE¡»Eü
11	* ÏEÄzziÈºCpÆÄÔj·é±Æð³Åø·éD
12	* (1) {\tgEFAð\[XR[hÌ`Åp·éêÉÍCãLÌì
13	* \¦C±Ìpð¨æÑºLÌ³ÛØKèªC»ÌÜÜÌ`Å\[
14	* XR[hÉÜÜêÄ¢é±ÆD
15	* (2) {\tgEFAðCCu`®ÈÇC¼Ì\tgEFAJÉg
16	* pÅ«é`ÅÄzz·éêÉÍCÄzzÉº¤hL
17	gip
18	* Ò}j
19	AÈÇjÉCãLÌì \¦C±Ìpð¨æÑºL
20	* Ì³ÛØKèðfÚ·é±ÆD
21	* (3) {\tgEFAðC@íÉgÝÞÈÇC¼Ì\tgEFAJÉg
22	* pÅ«È¢`ÅÄzz·éêÉÍCÌ¢¸ê©Ìðð½·±
23	* ÆD
24	* (a) ÄzzÉº¤hL
25	gipÒ}j
26	AÈÇjÉCãLÌ
27	* ì \¦C±Ìpð¨æÑºLÌ³ÛØKèðfÚ·é±ÆD
28	* (b) ÄzzÌ`ÔðCÊÉèßéû@ÉæÁÄCTOPPERSvWFNgÉ
29	* ñ·é±ÆD
30	* (4) {\tgEFAÌpÉæè¼ÚIÜ½ÍÔÚIÉ¶¶é¢©Èé¹
31	* Q©çàCãLì Ò¨æÑTOPPERSvWFNgðÆÓ·é±ÆD
32	* Ü½C{\tgEFAÌ[UÜ½ÍGh[U©çÌ¢©Èé
33	* RÉîÃ¿©çàCãLì Ò¨æÑTOPPERSvWFNgð
34	* ÆÓ·é±ÆD
35	*
36	* {\tgEFAÍC³ÛØÅñ³êÄ¢éàÌÅ éDãLì Ò¨
37	* æÑTOPPERSvWFNgÍC{\tgEFAÉÖµÄCÁèÌgpÚI
38	* ÉÎ·éK«àÜßÄC¢©ÈéÛØàsíÈ¢DÜ½C{\tgEF
39	* AÌpÉæè¼ÚIÜ½ÍÔÚIÉ¶¶½¢©Èé¹QÉÖµÄàC»
40	* ÌÓCðíÈ¢D
41	*
42	* @(#) $Id: mutex.c 1694 2010-01-01 15:59:09Z ertl-hiro $
43	*/
44
45	/*
46	* ~
47	[ebNX@\
48	*/
49
50	#include "kernel_impl.h"
51	#include "check.h"
52	#include "task.h"
53	#include "wait.h"
54	#include "mutex.h"
55
56	/*
57	* g[XO}NÌftHgè`
58	*/
59	#ifndef LOG_LOC_MTX_ENTER
60	#define LOG_LOC_MTX_ENTER(mtxid)
61	#endif /* LOG_LOC_MTX_ENTER */
62
63	#ifndef LOG_LOC_MTX_LEAVE
64	#define LOG_LOC_MTX_LEAVE(ercd)
65	#endif /* LOG_LOC_MTX_LEAVE */
66
67	#ifndef LOG_PLOC_MTX_ENTER
68	#define LOG_PLOC_MTX_ENTER(mtxid)
69	#endif /* LOG_PLOC_MTX_ENTER */
70
71	#ifndef LOG_PLOC_MTX_LEAVE
72	#define LOG_PLOC_MTX_LEAVE(ercd)
73	#endif /* LOG_PLOC_MTX_LEAVE */
74
75	#ifndef LOG_TLOC_MTX_ENTER
76	#define LOG_TLOC_MTX_ENTER(mtxid, tmout)
77	#endif /* LOG_TLOC_MTX_ENTER */
78
79	#ifndef LOG_TLOC_MTX_LEAVE
80	#define LOG_TLOC_MTX_LEAVE(ercd)
81	#endif /* LOG_TLOC_MTX_LEAVE */
82
83	#ifndef LOG_UNL_MTX_ENTER
84	#define LOG_UNL_MTX_ENTER(mtxid)
85	#endif /* LOG_UNL_MTX_ENTER */
86
87	#ifndef LOG_UNL_MTX_LEAVE
88	#define LOG_UNL_MTX_LEAVE(ercd)
89	#endif /* LOG_UNL_MTX_LEAVE */
90
91	#ifndef LOG_INI_MTX_ENTER
92	#define LOG_INI_MTX_ENTER(mtxid)
93	#endif /* LOG_INI_MTX_ENTER */
94
95	#ifndef LOG_INI_MTX_LEAVE
96	#define LOG_INI_MTX_LEAVE(ercd)
97	#endif /* LOG_INI_MTX_LEAVE */
98
99	#ifndef LOG_REF_MTX_ENTER
100	#define LOG_REF_MTX_ENTER(mtxid, pk_rmtx)
101	#endif /* LOG_REF_MTX_ENTER */
102
103	#ifndef LOG_REF_MTX_LEAVE
104	#define LOG_REF_MTX_LEAVE(ercd, pk_rmtx)
105	#endif /* LOG_REF_MTX_LEAVE */
106
107	/*
108	* ~
109	[ebNXÌ
110	*/
111	#define tnum_mtx ((uint_t)(tmax_mtxid - TMIN_MTXID + 1))
112
113	/*
114	* ~
115	[ebNXID©ç~
116	[ebNXÇubNðæèo·½ßÌ}N
117	*/
118	#define INDEX_MTX(mtxid) ((uint_t)((mtxid) - TMIN_MTXID))
119	#define get_mtxcb(mtxid) (&(mtxcb_table[INDEX_MTX(mtxid)]))
120
121	/*
122	* ~
123	[ebNXÇubNÌmutex_queueÖÌ\|C^©çC~
124	[eb
125	* NXÇubNÖÌ\|C^ðæèo·½ßÌ}N
126	*/
127	#define MTXCB_QUEUE(p_queue) \
128	((MTXCB )(((char ) p_queue) - offsetof(MTXCB, mutex_queue)))
129
130	/*
131	* ~
132	[ebNXÌvgRð»f·é}N
133	*/
134	#define MTXPROTO_MASK 0x03U
135	#define MTXPROTO(p_mtxcb) ((p_mtxcb)->p_mtxinib->mtxatr & MTXPROTO_MASK)
136	#define MTX_CEILING(p_mtxcb) (MTXPROTO(p_mtxcb) == TA_CEILING)
137
138	/*
139	* tbN[`ÄoµpÌÏ
140	*/
141	#ifdef TOPPERS_mtxhook
142
143	bool_t (mtxhook_check_ceilpri)(TCB p_tcb, uint_t bpriority) = NULL;
144	bool_t (mtxhook_scan_ceilmtx)(TCB p_tcb) = NULL;
145	bool_t (mtxhook_release_all)(TCB p_tcb) = NULL;
146
147	#endif /* TOPPERS_mtxhook */
148
149	/*
150	* ~
151	[ebNX@\Ìú»
152	*/
153	#ifdef TOPPERS_mtxini
154
155	void
156	initialize_mutex(void)
157	{
158	uint_t i;
159	MTXCB *p_mtxcb;
160
161	mtxhook_check_ceilpri = mutex_check_ceilpri;
162	mtxhook_scan_ceilmtx = mutex_scan_ceilmtx;
163	mtxhook_release_all = mutex_release_all;
164
165	for (p_mtxcb = mtxcb_table, i = 0; i < tnum_mtx; p_mtxcb++, i++) {
166	queue_initialize(&(p_mtxcb->wait_queue));
167	p_mtxcb->p_mtxinib = &(mtxinib_table[i]);
168	p_mtxcb->p_loctsk = NULL;
169	}
170	}
171
172	#endif /* TOPPERS_mtxini */
173
174	/*
175	* ãÀDæxá½Ì`FbN
176	*/
177	#ifdef TOPPERS_mtxchk
178
179	bool_t
180	mutex_check_ceilpri(TCB *p_tcb, uint_t bpriority)
181	{
182	QUEUE *p_queue;
183	MTXCB *p_mtxcb;
184
185	/*
186	* ^XNªbNµÄ¢éDæxãÀ~
187	[ebNXÌÅCãÀDæ
188	* xªbpriorityæèàá¢àÌª êÎCfalseðÔ·D
189	*/
190	p_queue = p_tcb->mutex_queue.p_next;
191	while (p_queue != &(p_tcb->mutex_queue)) {
192	p_mtxcb = MTXCB_QUEUE(p_queue);
193	if (MTX_CEILING(p_mtxcb) && bpriority < p_mtxcb->p_mtxinib->ceilpri) {
194	return(false);
195	}
196	p_queue = p_queue->p_next;
197	}
198
199	/*
200	* ^XNªDæxãÀ~
201	[ebNXÌbNðÒÁÄ¢éêÉC»
202	* ÌãÀDæxªbpriorityæèàá¯êÎCfalseðÔ·D
203	*/
204	if (TSTAT_WAIT_MTX(p_tcb->tstat)) {
205	p_mtxcb = ((WINFO_MTX *)(p_tcb->p_winfo))->p_mtxcb;
206	if (MTX_CEILING(p_mtxcb) && bpriority < p_mtxcb->p_mtxinib->ceilpri) {
207	return(false);
208	}
209	}
210
211	/*
212	* ¢¸êÌðÉàÄÍÜçÈ¯êÎtrueðÔ·D
213	*/
214	return(true);
215	}
216
217	#endif /* TOPPERS_mtxchk */
218
219	/*
220	* DæxãÀ~
221	[ebNXðbNµÄ¢é©Ì`FbN
222	*/
223	#ifdef TOPPERS_mtxscan
224
225	bool_t
226	mutex_scan_ceilmtx(TCB *p_tcb)
227	{
228	QUEUE *p_queue;
229	MTXCB *p_mtxcb;
230
231	p_queue = p_tcb->mutex_queue.p_next;
232	while (p_queue != &(p_tcb->mutex_queue)) {
233	p_mtxcb = MTXCB_QUEUE(p_queue);
234	if (MTX_CEILING(p_mtxcb)) {
235	return(true);
236	}
237	p_queue = p_queue->p_next;
238	}
239	return(false);
240	}
241
242	#endif /* TOPPERS_mtxscan */
243
244	/*
245	* ^XNÌ»ÝDæxÌvZ
246	*/
247	#ifdef TOPPERS_mtxcalc
248
249	uint_t
250	mutex_calc_priority(TCB *p_tcb)
251	{
252	uint_t priority;
253	QUEUE *p_queue;
254	MTXCB *p_mtxcb;
255
256	priority = p_tcb->bpriority;
257	p_queue = p_tcb->mutex_queue.p_next;
258	while (p_queue != &(p_tcb->mutex_queue)) {
259	p_mtxcb = MTXCB_QUEUE(p_queue);
260	if (MTX_CEILING(p_mtxcb) && p_mtxcb->p_mtxinib->ceilpri < priority) {
261	priority = p_mtxcb->p_mtxinib->ceilpri;
262	}
263	p_queue = p_queue->p_next;
264	}
265	return(priority);
266	}
267
268	#endif /* TOPPERS_mtxcalc */
269
270	/*
271	* vfDæxªãªéiÜ½Í¦éjêÌ»ÝDæxÏX
272	*/
273	Inline bool_t
274	mutex_raise_priority(TCB *p_tcb, uint_t newpri)
275	{
276	if (newpri < p_tcb->priority) {
277	return(change_priority(p_tcb, newpri, true));
278	}
279	return(false);
280	}
281
282	/*
283	* vfDæxªºªéiÜ½Í¸éjêÌ»ÝDæxÏX
284	*/
285	Inline bool_t
286	mutex_drop_priority(TCB *p_tcb, uint_t oldpri)
287	{
288	uint_t newpri;
289
290	if (oldpri == p_tcb->priority) {
291	newpri = mutex_calc_priority(p_tcb);
292	if (newpri != p_tcb->priority) {
293	return(change_priority(p_tcb, newpri, true));
294	}
295	}
296	return(false);
297	}
298
299	/*
300	* ~
301	[ebNXðbNµ½êÌ
302	*/
303	Inline bool_t
304	mutex_acquire(TCB p_loctsk, MTXCB p_mtxcb)
305	{
306	p_mtxcb->p_loctsk = p_loctsk;
307	queue_insert_prev(&(p_loctsk->mutex_queue), &(p_mtxcb->mutex_queue));
308	if (MTX_CEILING(p_mtxcb)) {
309	return(mutex_raise_priority(p_loctsk, p_mtxcb->p_mtxinib->ceilpri));
310	}
311	return(false);
312	}
313
314	/*
315	* ~
316	[ebNXÌbNð
317	*/
318	#ifdef TOPPERS_mtxrel
319
320	bool_t
321	mutex_release(MTXCB *p_mtxcb)
322	{
323	TCB *p_tcb;
324
325	if (queue_empty(&(p_mtxcb->wait_queue))) {
326	p_mtxcb->p_loctsk = NULL;
327	return(false);
328	}
329	else {
330	/*
331	* ~
332	[ebNXÒ¿L
333	[Ìæª^XNip_tcbjÉC~
334	[eb
335	* NXðbN³¹éD
336	*/
337	p_tcb = (TCB *) queue_delete_next(&(p_mtxcb->wait_queue));
338	wait_dequeue_tmevtb(p_tcb);
339	p_tcb->p_winfo->wercd = E_OK;
340
341	p_mtxcb->p_loctsk = p_tcb;
342	queue_insert_prev(&(p_tcb->mutex_queue), &(p_mtxcb->mutex_queue));
343	if (MTX_CEILING(p_mtxcb)) {
344	if (p_mtxcb->p_mtxinib->ceilpri < p_tcb->priority) {
345	p_tcb->priority = p_mtxcb->p_mtxinib->ceilpri;
346	}
347	}
348	return(make_non_wait(p_tcb));
349	}
350	}
351
352	#endif /* TOPPERS_mtxrel */
353
354	/*
355	* ^XNªbNµÄ¢é·×ÄÌ~
356	[ebNXÌbNð
357	*/
358	#ifdef TOPPERS_mtxrela
359
360	bool_t
361	mutex_release_all(TCB *p_tcb)
362	{
363	MTXCB *p_mtxcb;
364	bool_t dspreq = false;
365
366	while (!queue_empty(&(p_tcb->mutex_queue))) {
367	p_mtxcb = MTXCB_QUEUE(p_tcb->mutex_queue.p_next);
368	queue_delete(&(p_mtxcb->mutex_queue));
369	if (mutex_release(p_mtxcb)) {
370	dspreq = true;
371	}
372	}
373	return(dspreq);
374	}
375
376	#endif /* TOPPERS_mtxrela */
377
378	/*
379	* ~
380	[ebNXÌbN
381	*/
382	#ifdef TOPPERS_loc_mtx
383
384	ER
385	loc_mtx(ID mtxid)
386	{
387	MTXCB *p_mtxcb;
388	WINFO_MTX winfo_mtx;
389	ER ercd;
390
391	LOG_LOC_MTX_ENTER(mtxid);
392	CHECK_DISPATCH();
393	CHECK_MTXID(mtxid);
394	p_mtxcb = get_mtxcb(mtxid);
395
396	t_lock_cpu();
397	if (MTX_CEILING(p_mtxcb)
398	&& p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
399	ercd = E_ILUSE;
400	}
401	else if (p_mtxcb->p_loctsk == NULL) {
402	(void) mutex_acquire(p_runtsk, p_mtxcb);
403	/*
404	* DæxãÀ~
405	[ebNXðbNµ½êCp_runtskÌDæx
406	* ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
407	*/
408	assert(!(p_runtsk != p_schedtsk && dspflg));
409	ercd = E_OK;
410	}
411	else if (p_mtxcb->p_loctsk == p_runtsk) {
412	ercd = E_ILUSE;
413	}
414	else {
415	p_runtsk->tstat = (TS_WAITING \| TS_WAIT_MTX);
416	wobj_make_wait((WOBJCB ) p_mtxcb, (WINFO_WOBJ ) &winfo_mtx);
417	dispatch();
418	ercd = winfo_mtx.winfo.wercd;
419	}
420	t_unlock_cpu();
421
422	error_exit:
423	LOG_LOC_MTX_LEAVE(ercd);
424	return(ercd);
425	}
426
427	#endif /* TOPPERS_loc_mtx */
428
429	/*
430	* ~
431	[ebNXÌbNi\|[Oj
432	*/
433	#ifdef TOPPERS_ploc_mtx
434
435	ER
436	ploc_mtx(ID mtxid)
437	{
438	MTXCB *p_mtxcb;
439	ER ercd;
440
441	LOG_PLOC_MTX_ENTER(mtxid);
442	CHECK_TSKCTX_UNL();
443	CHECK_MTXID(mtxid);
444	p_mtxcb = get_mtxcb(mtxid);
445
446	t_lock_cpu();
447	if (MTX_CEILING(p_mtxcb)
448	&& p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
449	ercd = E_ILUSE;
450	}
451	else if (p_mtxcb->p_loctsk == NULL) {
452	(void) mutex_acquire(p_runtsk, p_mtxcb);
453	/*
454	* DæxãÀ~
455	[ebNXðbNµ½êCp_runtskÌDæx
456	* ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
457	*/
458	assert(!(p_runtsk != p_schedtsk && dspflg));
459	ercd = E_OK;
460	}
461	else if (p_mtxcb->p_loctsk == p_runtsk) {
462	ercd = E_ILUSE;
463	}
464	else {
465	ercd = E_TMOUT;
466	}
467	t_unlock_cpu();
468
469	error_exit:
470	LOG_PLOC_MTX_LEAVE(ercd);
471	return(ercd);
472	}
473
474	#endif /* TOPPERS_ploc_mtx */
475
476	/*
477	* ~
478	[ebNXÌbNi^CAEg èj
479	*/
480	#ifdef TOPPERS_tloc_mtx
481
482	ER
483	tloc_mtx(ID mtxid, TMO tmout)
484	{
485	MTXCB *p_mtxcb;
486	WINFO_MTX winfo_mtx;
487	TMEVTB tmevtb;
488	ER ercd;
489
490	LOG_TLOC_MTX_ENTER(mtxid, tmout);
491	CHECK_DISPATCH();
492	CHECK_MTXID(mtxid);
493	CHECK_TMOUT(tmout);
494	p_mtxcb = get_mtxcb(mtxid);
495
496	t_lock_cpu();
497	if (MTX_CEILING(p_mtxcb)
498	&& p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
499	ercd = E_ILUSE;
500	}
501	else if (p_mtxcb->p_loctsk == NULL) {
502	(void) mutex_acquire(p_runtsk, p_mtxcb);
503	/*
504	* DæxãÀ~
505	[ebNXðbNµ½êCp_runtskÌDæx
506	* ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
507	*/
508	assert(!(p_runtsk != p_schedtsk && dspflg));
509	ercd = E_OK;
510	}
511	else if (p_mtxcb->p_loctsk == p_runtsk) {
512	ercd = E_ILUSE;
513	}
514	else if (tmout == TMO_POL) {
515	ercd = E_TMOUT;
516	}
517	else {
518	p_runtsk->tstat = (TS_WAITING \| TS_WAIT_MTX);
519	wobj_make_wait_tmout((WOBJCB ) p_mtxcb, (WINFO_WOBJ ) &winfo_mtx,
520	&tmevtb, tmout);
521	dispatch();
522	ercd = winfo_mtx.winfo.wercd;
523	}
524	t_unlock_cpu();
525
526	error_exit:
527	LOG_TLOC_MTX_LEAVE(ercd);
528	return(ercd);
529	}
530
531	#endif /* TOPPERS_tloc_mtx */
532
533	/*
534	* ~
535	[ebNXÌbNð
536	*/
537	#ifdef TOPPERS_unl_mtx
538
539	ER
540	unl_mtx(ID mtxid)
541	{
542	MTXCB *p_mtxcb;
543	bool_t dspreq = false;
544	ER ercd;
545
546	LOG_UNL_MTX_ENTER(mtxid);
547	CHECK_TSKCTX_UNL();
548	CHECK_MTXID(mtxid);
549	p_mtxcb = get_mtxcb(mtxid);
550
551	t_lock_cpu();
552	if (p_mtxcb->p_loctsk != p_runtsk) {
553	ercd = E_ILUSE;
554	}
555	else {
556	queue_delete(&(p_mtxcb->mutex_queue));
557	if (MTX_CEILING(p_mtxcb)) {
558	if (mutex_drop_priority(p_runtsk, p_mtxcb->p_mtxinib->ceilpri)) {
559	dspreq = true;
560	}
561	}
562	if (mutex_release(p_mtxcb)) {
563	dspreq = true;
564	}
565	if (dspreq) {
566	dispatch();
567	}
568	ercd = E_OK;
569	}
570	t_unlock_cpu();
571
572	error_exit:
573	LOG_UNL_MTX_LEAVE(ercd);
574	return(ercd);
575	}
576
577	#endif /* TOPPERS_unl_mtx */
578
579	/*
580	* ~
581	[ebNXÌú»
582	*/
583	#ifdef TOPPERS_ini_mtx
584
585	ER
586	ini_mtx(ID mtxid)
587	{
588	MTXCB *p_mtxcb;
589	TCB *p_loctsk;
590	bool_t dspreq;
591	ER ercd;
592
593	LOG_INI_MTX_ENTER(mtxid);
594	CHECK_TSKCTX_UNL();
595	CHECK_MTXID(mtxid);
596	p_mtxcb = get_mtxcb(mtxid);
597
598	t_lock_cpu();
599	dspreq = init_wait_queue(&(p_mtxcb->wait_queue));
600	p_loctsk = p_mtxcb->p_loctsk;
601	if (p_loctsk != NULL) {
602	queue_delete(&(p_mtxcb->mutex_queue));
603	p_mtxcb->p_loctsk = NULL;
604	if (MTX_CEILING(p_mtxcb)) {
605	if (mutex_drop_priority(p_loctsk, p_mtxcb->p_mtxinib->ceilpri)) {
606	dspreq = true;
607	}
608	}
609	}
610	if (dspreq) {
611	dispatch();
612	}
613	ercd = E_OK;
614	t_unlock_cpu();
615
616	error_exit:
617	LOG_INI_MTX_LEAVE(ercd);
618	return(ercd);
619	}
620
621	#endif /* TOPPERS_ini_mtx */
622
623	/*
624	* ~
625	[ebNXÌóÔQÆ
626	*/
627	#ifdef TOPPERS_ref_mtx
628
629	ER
630	ref_mtx(ID mtxid, T_RMTX *pk_rmtx)
631	{
632	MTXCB *p_mtxcb;
633	ER ercd;
634
635	LOG_REF_MTX_ENTER(mtxid, pk_rmtx);
636	CHECK_TSKCTX_UNL();
637	CHECK_MTXID(mtxid);
638	p_mtxcb = get_mtxcb(mtxid);
639
640	t_lock_cpu();
641	pk_rmtx->htskid = (p_mtxcb->p_loctsk != NULL) ? TSKID(p_mtxcb->p_loctsk)
642	: TSK_NONE;
643	pk_rmtx->wtskid = wait_tskid(&(p_mtxcb->wait_queue));
644	ercd = E_OK;
645	t_unlock_cpu();
646
647	error_exit:
648	LOG_REF_MTX_LEAVE(ercd, pk_rmtx);
649	return(ercd);
650	}
651
652	#endif /* TOPPERS_ref_mtx */

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source: asp_ewarm/asp-1.7.0/extension/mutex/kernel/mutex.c@ 61

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