aboutsummaryrefslogtreecommitdiffstats
path: root/erts/include/internal/ethr_mutex.h
blob: a0685ea3c0277ef7ec90e182ca07b029a5308263 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2010-2011. All Rights Reserved.
 *
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * %CopyrightEnd%
 */

/*
 * Description: Mutex, rwmutex and condition variable implementation
 * Author: Rickard Green
 */

#ifndef ETHR_MUTEX_H__
#define ETHR_MUTEX_H__

#define ETHR_RWMUTEX_INITIALIZED 	0x99999999
#define ETHR_MUTEX_INITIALIZED		0x77777777
#define ETHR_COND_INITIALIZED		0x55555555

#if 0
#  define ETHR_MTX_HARD_DEBUG
#endif

#if 0
#  define ETHR_MTX_CHK_EXCL
#if 1
#    define ETHR_MTX_CHK_NON_EXCL
#endif
#endif

#ifdef ETHR_MTX_HARD_DEBUG
#  ifdef __GNUC__
#    warning ETHR_MTX_HARD_DEBUG
#  endif
/*#  define ETHR_MTX_HARD_DEBUG_LFS*/
/*#  define ETHR_MTX_HARD_DEBUG_FENCE*/
/*#  define ETHR_MTX_HARD_DEBUG_Q*/
#  define ETHR_MTX_HARD_DEBUG_WSQ

#  if !defined(ETHR_MTX_HARD_DEBUG_WSQ) && defined(ETHR_MTX_HARD_DEBUG_Q)
#    define ETHR_MTX_HARD_DEBUG_WSQ
#  endif
#endif

#ifndef ETHR_INLINE_MTX_FUNC_NAME_
#  define ETHR_INLINE_MTX_FUNC_NAME_(X) X
#endif

#if defined(ETHR_USE_OWN_RWMTX_IMPL__) || defined(ETHR_USE_OWN_MTX_IMPL__)

#ifdef ETHR_DEBUG
#  ifndef ETHR_MTX_CHK_EXCL
#    define ETHR_MTX_CHK_EXCL
#  endif
#  ifndef ETHR_MTX_CHK_NON_EXCL
#    define ETHR_MTX_CHK_NON_EXCL
#  endif
#endif

#if 0
#  define ETHR_MTX_Q_LOCK_SPINLOCK__
#  define ETHR_MTX_QLOCK_TYPE__ ethr_spinlock_t
#elif defined(ETHR_PTHREADS)
#  define ETHR_MTX_Q_LOCK_PTHREAD_MUTEX__
#  define ETHR_MTX_QLOCK_TYPE__ pthread_mutex_t
#elif defined(ETHR_WIN32_THREADS)
#  define ETHR_MTX_Q_LOCK_CRITICAL_SECTION__
#  define ETHR_MTX_QLOCK_TYPE__ CRITICAL_SECTION
#else
#  error Need a qlock implementation
#endif

#define ETHR_RWMTX_W_FLG__		(((ethr_sint32_t) 1) << 31)
#define ETHR_RWMTX_W_WAIT_FLG__		(((ethr_sint32_t) 1) << 30)
#define ETHR_RWMTX_R_WAIT_FLG__		(((ethr_sint32_t) 1) << 29)

/* frequent read kind */
#define ETHR_RWMTX_R_FLG__		(((ethr_sint32_t) 1) << 28)
#define ETHR_RWMTX_R_ABRT_UNLCK_FLG__	(((ethr_sint32_t) 1) << 27)
#define ETHR_RWMTX_R_PEND_UNLCK_MASK__	(ETHR_RWMTX_R_ABRT_UNLCK_FLG__ - 1)

/* normal kind */
#define ETHR_RWMTX_RS_MASK__		(ETHR_RWMTX_R_WAIT_FLG__ - 1)

#define ETHR_RWMTX_WAIT_FLGS__ \
  (ETHR_RWMTX_W_WAIT_FLG__|ETHR_RWMTX_R_WAIT_FLG__)

#define ETHR_CND_WAIT_FLG__		ETHR_RWMTX_R_WAIT_FLG__

#ifdef ETHR_DEBUG
#define ETHR_DBG_CHK_UNUSED_FLG_BITS(V)			\
  ETHR_ASSERT(!((V) & ~(ETHR_RWMTX_W_FLG__		\
			| ETHR_RWMTX_W_WAIT_FLG__	\
			| ETHR_RWMTX_R_WAIT_FLG__	\
			| ETHR_RWMTX_RS_MASK__)))
#else
#define ETHR_DBG_CHK_UNUSED_FLG_BITS(V)
#endif

#define ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(MTX)		\
  ETHR_DBG_CHK_UNUSED_FLG_BITS(ethr_atomic32_read(&(MTX)->mtxb.flgs))

struct ethr_mutex_base_ {
#ifdef ETHR_MTX_HARD_DEBUG_FENCE
    long pre_fence;
#endif
    ethr_atomic32_t flgs;
    short aux_scnt;
    short main_scnt;
    ETHR_MTX_QLOCK_TYPE__ qlck;
    ethr_ts_event *q;
#ifdef ETHR_MTX_HARD_DEBUG_WSQ
    int ws;
#endif
#ifdef ETHR_MTX_CHK_EXCL
    ethr_atomic32_t exclusive;
#endif
#ifdef ETHR_MTX_CHK_NON_EXCL
    ethr_atomic32_t non_exclusive;
#endif
#ifdef ETHR_MTX_HARD_DEBUG_LFS
    ethr_atomic32_t hdbg_lfs;
#endif
};

#endif

typedef struct {
    int main_spincount;
    int aux_spincount;
} ethr_mutex_opt;

typedef struct {
    int main_spincount;
    int aux_spincount;
} ethr_cond_opt;

#ifdef ETHR_USE_OWN_MTX_IMPL__

typedef struct ethr_mutex_ ethr_mutex;
struct ethr_mutex_ {
    struct ethr_mutex_base_ mtxb;
#ifdef ETHR_MTX_HARD_DEBUG_FENCE
    long post_fence;
#endif
#if ETHR_XCHK
    int initialized;
#endif
};

typedef struct ethr_cond_ ethr_cond;
struct ethr_cond_ {
#ifdef ETHR_MTX_HARD_DEBUG_FENCE
    struct {
	long pre_fence;
    } mtxb; /* mtxb allows us to use same macro as for mutex and rwmutex... */
#endif
    ETHR_MTX_QLOCK_TYPE__ qlck;
    ethr_ts_event *q;
    short aux_scnt;
    short main_scnt;
#ifdef ETHR_MTX_HARD_DEBUG_FENCE
    long post_fence;
#endif
#if ETHR_XCHK
    int initialized;
#endif
};

#else /* pthread */

typedef struct ethr_mutex_ ethr_mutex;
struct ethr_mutex_ {
    pthread_mutex_t pt_mtx;
#if ETHR_XCHK
    int initialized;
#endif
};

typedef struct ethr_cond_ ethr_cond;
struct ethr_cond_ {
    pthread_cond_t pt_cnd;
#if ETHR_XCHK
    int initialized;
#endif
};

#endif /* pthread */

int ethr_mutex_init_opt(ethr_mutex *, ethr_mutex_opt *);
int ethr_mutex_init(ethr_mutex *);
int ethr_mutex_destroy(ethr_mutex *);
#if !defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_MUTEX_IMPL__)
int ethr_mutex_trylock(ethr_mutex *);
void ethr_mutex_lock(ethr_mutex *);
void ethr_mutex_unlock(ethr_mutex *);
#endif
int ethr_cond_init_opt(ethr_cond *, ethr_cond_opt *);
int ethr_cond_init(ethr_cond *);
int ethr_cond_destroy(ethr_cond *);
void ethr_cond_signal(ethr_cond *);
void ethr_cond_broadcast(ethr_cond *);
int ethr_cond_wait(ethr_cond *, ethr_mutex *);

typedef enum {
    ETHR_RWMUTEX_TYPE_NORMAL,
    ETHR_RWMUTEX_TYPE_FREQUENT_READ,
    ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ
} ethr_rwmutex_type;

typedef enum {
    ETHR_RWMUTEX_LONG_LIVED,
    ETHR_RWMUTEX_SHORT_LIVED,
    ETHR_RWMUTEX_UNKNOWN_LIVED
} ethr_rwmutex_lived;

typedef struct {
    ethr_rwmutex_type type;
    ethr_rwmutex_lived lived;
    int main_spincount;
    int aux_spincount;
} ethr_rwmutex_opt;

#define ETHR_RWMUTEX_OPT_DEFAULT_INITER \
  {ETHR_RWMUTEX_TYPE_NORMAL, ETHR_RWMUTEX_UNKNOWN_LIVED, -1, -1}

#ifdef ETHR_USE_OWN_RWMTX_IMPL__

typedef union {
    struct {
	ethr_atomic32_t readers;
	int waiting_readers;
	int byte_offset;
	ethr_rwmutex_lived lived;
    } data;
    char align__[ETHR_CACHE_LINE_SIZE];
} ethr_rwmtx_readers_array__;

typedef struct ethr_rwmutex_ ethr_rwmutex;
struct ethr_rwmutex_ {
    struct ethr_mutex_base_ mtxb;
    ethr_rwmutex_type type;
    ethr_ts_event *rq_end;
    union {
	ethr_rwmtx_readers_array__ *ra;
	int rs;
    } tdata;
#ifdef ETHR_MTX_HARD_DEBUG_FENCE
    long post_fence;
#endif
#if ETHR_XCHK
    int initialized;
#endif
};

#else /* pthread_rwlock */

typedef struct ethr_rwmutex_ ethr_rwmutex;
struct ethr_rwmutex_ {
    pthread_rwlock_t pt_rwlock;
#if ETHR_XCHK
    int initialized;
#endif
};

#endif /* pthread_rwlock */

int ethr_rwmutex_set_reader_group(int);
int ethr_rwmutex_init_opt(ethr_rwmutex *, ethr_rwmutex_opt *);
int ethr_rwmutex_init(ethr_rwmutex *);
int ethr_rwmutex_destroy(ethr_rwmutex *);
#if defined(ETHR_USE_OWN_RWMTX_IMPL__) \
    || !defined(ETHR_TRY_INLINE_FUNCS) \
    || defined(ETHR_MUTEX_IMPL__)
int ethr_rwmutex_tryrlock(ethr_rwmutex *);
void ethr_rwmutex_rlock(ethr_rwmutex *);
void ethr_rwmutex_runlock(ethr_rwmutex *);
int ethr_rwmutex_tryrwlock(ethr_rwmutex *);
void ethr_rwmutex_rwlock(ethr_rwmutex *);
void ethr_rwmutex_rwunlock(ethr_rwmutex *);
#endif

#ifdef ETHR_MTX_HARD_DEBUG
#define ETHR_MTX_HARD_ASSERT(A) \
  ((void) ((A) ? 1 : ethr_assert_failed(__FILE__, __LINE__, #A)))
#else
#define ETHR_MTX_HARD_ASSERT(A) ((void) 1)
#endif

#ifdef ETHR_MTX_HARD_DEBUG_LFS
#  define ETHR_MTX_HARD_DEBUG_LFS_INIT(MTXB)				\
do {									\
    ethr_atomic32_init(&(MTXB)->hdbg_lfs, 0);				\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_RLOCK(MTXB)				\
do {									\
    ethr_sint32_t val__;						\
    ETHR_COMPILER_BARRIER;						\
    val__ = ethr_atomic32_inc_read(&(MTXB)->hdbg_lfs);			\
    ETHR_MTX_HARD_ASSERT(val__ > 0);					\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_TRYRLOCK(MTXB, RES)			\
do {									\
    ETHR_COMPILER_BARRIER;						\
    if ((RES) == 0)							\
	ETHR_MTX_HARD_DEBUG_LFS_RLOCK((MTXB));				\
    else								\
	ETHR_MTX_HARD_ASSERT((RES) == EBUSY);				\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_RUNLOCK(MTXB)				\
do {									\
    ethr_sint32_t val__ = ethr_atomic32_dec_read(&(MTXB)->hdbg_lfs);	\
    ETHR_MTX_HARD_ASSERT(val__ >= 0);					\
    ETHR_COMPILER_BARRIER;						\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_RWLOCK(MTXB)				\
do {									\
    ethr_sint32_t val__;						\
    ETHR_COMPILER_BARRIER;						\
    val__ = ethr_atomic32_dec_read(&(MTXB)->hdbg_lfs);			\
    ETHR_MTX_HARD_ASSERT(val__ == -1);					\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_TRYRWLOCK(MTXB, RES)			\
do {									\
    ETHR_COMPILER_BARRIER;						\
    if ((RES) == 0)							\
	ETHR_MTX_HARD_DEBUG_LFS_RWLOCK((MTXB));				\
    else								\
	ETHR_MTX_HARD_ASSERT((RES) == EBUSY);				\
} while (0)
#  define ETHR_MTX_HARD_DEBUG_LFS_RWUNLOCK(MTXB)			\
do {									\
    ethr_sint32_t val__ = ethr_atomic32_inctest(&(MTXB)->hdbg_lfs);	\
    ETHR_MTX_HARD_ASSERT(val__ == 0);					\
    ETHR_COMPILER_BARRIER;						\
} while (0)
#else
#  define ETHR_MTX_HARD_DEBUG_LFS_INIT(MTXB)
#  define ETHR_MTX_HARD_DEBUG_LFS_RLOCK(MTXB)
#  define ETHR_MTX_HARD_DEBUG_LFS_TRYRLOCK(MTXB, RES)
#  define ETHR_MTX_HARD_DEBUG_LFS_RUNLOCK(MTXB)
#  define ETHR_MTX_HARD_DEBUG_LFS_RWLOCK(MTXB)
#  define ETHR_MTX_HARD_DEBUG_LFS_TRYRWLOCK(MTXB, RES)
#  define ETHR_MTX_HARD_DEBUG_LFS_RWUNLOCK(MTXB)
#endif

#ifdef ETHR_MTX_HARD_DEBUG_FENCE

#if ETHR_SIZEOF_PTR == 8
#  define ETHR_MTX_HARD_DEBUG_PRE_FENCE		0xdeadbeefdeadbeefL
#  define ETHR_MTX_HARD_DEBUG_POST_FENCE	0xdeaddeaddeaddeadL
#else
#  define ETHR_MTX_HARD_DEBUG_PRE_FENCE		0xdeaddeadL
#  define ETHR_MTX_HARD_DEBUG_POST_FENCE	0xdeaddeadL
#endif

#define ETHR_MTX_HARD_DEBUG_FENCE_CHK(X) \
do { \
    ETHR_COMPILER_BARRIER; \
    ETHR_MTX_HARD_ASSERT((X)->mtxb.pre_fence == ETHR_MTX_HARD_DEBUG_PRE_FENCE);\
    ETHR_MTX_HARD_ASSERT((X)->post_fence == ETHR_MTX_HARD_DEBUG_POST_FENCE); \
    ETHR_COMPILER_BARRIER; \
} while (0)
#define ETHR_MTX_HARD_DEBUG_FENCE_INIT(X) \
do { \
    (X)->mtxb.pre_fence = ETHR_MTX_HARD_DEBUG_PRE_FENCE; \
    (X)->post_fence = ETHR_MTX_HARD_DEBUG_POST_FENCE; \
} while (0)
#else
#define ETHR_MTX_HARD_DEBUG_FENCE_CHK(X)
#define ETHR_MTX_HARD_DEBUG_FENCE_INIT(X)
#endif

#ifdef ETHR_MTX_CHK_EXCL

#if !defined(ETHR_DEBUG) && defined(__GNUC__)
#warning "check exclusive is enabled"
#endif

#  define ETHR_MTX_CHK_EXCL_INIT__(MTXB)		\
    ethr_atomic32_init(&(MTXB)->exclusive, 0)

#  define ETHR_MTX_CHK_EXCL_IS_EXCL(MTXB)		\
do {							\
    ETHR_COMPILER_BARRIER;				\
    if (!ethr_atomic32_read(&(MTXB)->exclusive))	\
	ethr_assert_failed(__FILE__, __LINE__, __func__,\
			   "is exclusive");		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#  define ETHR_MTX_CHK_EXCL_IS_NOT_EXCL(MTXB)		\
do {							\
    ETHR_COMPILER_BARRIER;				\
    if (ethr_atomic32_read(&(MTXB)->exclusive))		\
	ethr_assert_failed(__FILE__, __LINE__, __func__,\
			   "is not exclusive");		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#  define ETHR_MTX_CHK_EXCL_SET_EXCL(MTXB)		\
do {							\
    ETHR_MTX_CHK_EXCL_IS_NOT_EXCL((MTXB));		\
    ethr_atomic32_set(&(MTXB)->exclusive, 1);		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#  define ETHR_MTX_CHK_EXCL_UNSET_EXCL(MTXB)		\
do {							\
    ETHR_MTX_CHK_EXCL_IS_EXCL((MTXB));			\
    ethr_atomic32_set(&(MTXB)->exclusive, 0);		\
    ETHR_COMPILER_BARRIER;				\
} while (0)

#ifdef ETHR_MTX_CHK_NON_EXCL

#if !defined(ETHR_DEBUG) && defined(__GNUC__)
#warning "check non-exclusive is enabled"
#endif

#    define ETHR_MTX_CHK_NON_EXCL_INIT__(MTXB)		\
    ethr_atomic32_init(&(MTXB)->non_exclusive, 0)
#    define ETHR_MTX_CHK_EXCL_IS_NON_EXCL(MTXB)		\
do {							\
    ETHR_COMPILER_BARRIER;				\
    if (!ethr_atomic32_read(&(MTXB)->non_exclusive))	\
	ethr_assert_failed(__FILE__, __LINE__, __func__,\
			   "is non-exclusive");		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#    define ETHR_MTX_CHK_EXCL_IS_NOT_NON_EXCL(MTXB)	\
do {							\
    ETHR_COMPILER_BARRIER;				\
    if (ethr_atomic32_read(&(MTXB)->non_exclusive))	\
	ethr_assert_failed(__FILE__, __LINE__, __func__,\
			   "is not non-exclusive");	\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#    define ETHR_MTX_CHK_EXCL_SET_NON_EXCL(MTXB)	\
do {							\
    ETHR_COMPILER_BARRIER;				\
    ethr_atomic32_inc(&(MTXB)->non_exclusive);		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#    define ETHR_MTX_CHK_EXCL_SET_NON_EXCL_NO(MTXB, NO)	\
do {							\
    ETHR_COMPILER_BARRIER;				\
    ethr_atomic32_add(&(MTXB)->non_exclusive, (NO));	\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#    define ETHR_MTX_CHK_EXCL_UNSET_NON_EXCL(MTXB)	\
do {							\
    ETHR_COMPILER_BARRIER;				\
    ethr_atomic32_dec(&(MTXB)->non_exclusive);		\
    ETHR_COMPILER_BARRIER;				\
} while (0)
#else
#    define ETHR_MTX_CHK_NON_EXCL_INIT__(MTXB)
#    define ETHR_MTX_CHK_EXCL_IS_NON_EXCL(MTXB)
#    define ETHR_MTX_CHK_EXCL_IS_NOT_NON_EXCL(MTXB)
#    define ETHR_MTX_CHK_EXCL_SET_NON_EXCL_NO(MTXB, NO)
#    define ETHR_MTX_CHK_EXCL_SET_NON_EXCL(MTXB)
#    define ETHR_MTX_CHK_EXCL_UNSET_NON_EXCL(MTXB)
#endif

#else
#  define ETHR_MTX_CHK_EXCL_INIT__(MTXB)
#  define ETHR_MTX_CHK_EXCL_IS_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_IS_NOT_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_SET_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_UNSET_EXCL(MTXB)
#  define ETHR_MTX_CHK_NON_EXCL_INIT__(MTXB)
#  define ETHR_MTX_CHK_EXCL_IS_NON_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_IS_NOT_NON_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_SET_NON_EXCL_NO(MTXB, NO)
#  define ETHR_MTX_CHK_EXCL_SET_NON_EXCL(MTXB)
#  define ETHR_MTX_CHK_EXCL_UNSET_NON_EXCL(MTXB)
#endif

#  define ETHR_MTX_CHK_EXCL_INIT(MTXB)			\
do {							\
    ETHR_MTX_CHK_EXCL_INIT__((MTXB));			\
    ETHR_MTX_CHK_NON_EXCL_INIT__((MTXB));		\
} while (0)


#ifdef ETHR_USE_OWN_MTX_IMPL__

#define ETHR_MTX_DEFAULT_MAIN_SPINCOUNT_MAX 2000
#define ETHR_MTX_DEFAULT_MAIN_SPINCOUNT_BASE 800
#define ETHR_MTX_DEFAULT_MAIN_SPINCOUNT_INC 50
#define ETHR_MTX_DEFAULT_AUX_SPINCOUNT 50

#define ETHR_CND_DEFAULT_MAIN_SPINCOUNT 0
#define ETHR_CND_DEFAULT_AUX_SPINCOUNT 0

#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_MUTEX_IMPL__)

void ethr_mutex_lock_wait__(ethr_mutex *, ethr_sint32_t);
void ethr_mutex_unlock_wake__(ethr_mutex *, ethr_sint32_t);

static ETHR_INLINE int
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_trylock)(ethr_mutex *mtx)
{
    ethr_sint32_t act;
    int res;
    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);

    act = ethr_atomic32_cmpxchg_acqb(&mtx->mtxb.flgs, ETHR_RWMTX_W_FLG__, 0);
    res = (act == 0) ? 0 : EBUSY;

#ifdef ETHR_MTX_CHK_EXCL
    if (res == 0)
	ETHR_MTX_CHK_EXCL_SET_EXCL(&mtx->mtxb);
#endif

    ETHR_MTX_HARD_DEBUG_LFS_TRYRWLOCK(&mtx->mtxb, res);
    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);

    ETHR_COMPILER_BARRIER;
    return res;
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_lock)(ethr_mutex *mtx)
{
    ethr_sint32_t act;
    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);

    act = ethr_atomic32_cmpxchg_acqb(&mtx->mtxb.flgs, ETHR_RWMTX_W_FLG__, 0);
    if (act != 0)
	ethr_mutex_lock_wait__(mtx, act);

    ETHR_MTX_CHK_EXCL_SET_EXCL(&mtx->mtxb);

    ETHR_MTX_HARD_DEBUG_LFS_RWLOCK(&mtx->mtxb);
    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);

    ETHR_COMPILER_BARRIER;
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_unlock)(ethr_mutex *mtx)
{
    ethr_sint32_t act;
    ETHR_COMPILER_BARRIER;
    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_HARD_DEBUG_LFS_RWUNLOCK(&mtx->mtxb);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);

    ETHR_MTX_CHK_EXCL_UNSET_EXCL(&mtx->mtxb);

    act = ethr_atomic32_cmpxchg_relb(&mtx->mtxb.flgs, 0, ETHR_RWMTX_W_FLG__);
    if (act != ETHR_RWMTX_W_FLG__)
	ethr_mutex_unlock_wake__(mtx, act);

    ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
    ETHR_MTX_DBG_CHK_UNUSED_FLG_BITS(mtx);
}

#endif /* ETHR_TRY_INLINE_FUNCS */

#else /* pthread_mutex */

#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_MUTEX_IMPL__)

static ETHR_INLINE int
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_trylock)(ethr_mutex *mtx)
{
    int res;
    res = pthread_mutex_trylock(&mtx->pt_mtx);
    if (res != 0 && res != EBUSY)
	ETHR_FATAL_ERROR__(res);
    return res;
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_lock)(ethr_mutex *mtx)
{
    int res = pthread_mutex_lock(&mtx->pt_mtx);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_mutex_unlock)(ethr_mutex *mtx)
{
    int res = pthread_mutex_unlock(&mtx->pt_mtx);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

#endif /* ETHR_TRY_INLINE_FUNCS */

#endif /* pthread_mutex */

#ifdef ETHR_USE_OWN_RWMTX_IMPL__

#define ETHR_RWMTX_DEFAULT_MAIN_SPINCOUNT_MAX 2000
#define ETHR_RWMTX_DEFAULT_MAIN_SPINCOUNT_BASE 800
#define ETHR_RWMTX_DEFAULT_MAIN_SPINCOUNT_INC 50
#define ETHR_RWMTX_DEFAULT_AUX_SPINCOUNT 50

#else /* pthread_rwlock */

#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_MUTEX_IMPL__)

static ETHR_INLINE int
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_tryrlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_tryrdlock(&rwmtx->pt_rwlock);
    if (res != 0 && res != EBUSY)
	ETHR_FATAL_ERROR__(res);
    return res;
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_rlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_rdlock(&rwmtx->pt_rwlock);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_runlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_unlock(&rwmtx->pt_rwlock);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

static ETHR_INLINE int
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_tryrwlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_trywrlock(&rwmtx->pt_rwlock);
    if (res != 0 && res != EBUSY)
	ETHR_FATAL_ERROR__(res);
    return res;
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_rwlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_wrlock(&rwmtx->pt_rwlock);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

static ETHR_INLINE void
ETHR_INLINE_MTX_FUNC_NAME_(ethr_rwmutex_rwunlock)(ethr_rwmutex *rwmtx)
{
    int res = pthread_rwlock_unlock(&rwmtx->pt_rwlock);
    if (res != 0)
	ETHR_FATAL_ERROR__(res);
}

#endif /* ETHR_TRY_INLINE_FUNCS */

#endif /* pthread_rwlock */

int ethr_mutex_lib_init(int);
int ethr_mutex_lib_late_init(int, int);

#endif /* #ifndef ETHR_MUTEX_H__ */