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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
6 *
7 * Copyright (c) 2016, Even Rouault
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <assert.h>
33
34 #ifdef MUTEX_win32
35
36 /* Some versions of x86_64-w64-mingw32-gc -m32 resolve InterlockedCompareExchange() */
37 /* as __sync_val_compare_and_swap_4 but fails to link it. As this protects against */
38 /* a rather unlikely race, skip it */
39 #if !(defined(__MINGW32__) && defined(__i386__))
40 #define HAVE_INTERLOCKED_COMPARE_EXCHANGE 1
41 #endif
42
43 #include <windows.h>
44 #include <process.h>
45
46 #include "opj_includes.h"
47
48 OPJ_BOOL OPJ_CALLCONV opj_has_thread_support(void)
49 {
50 return OPJ_TRUE;
51 }
52
53 int OPJ_CALLCONV opj_get_num_cpus(void)
54 {
55 SYSTEM_INFO info;
56 DWORD dwNum;
57 GetSystemInfo(&info);
58 dwNum = info.dwNumberOfProcessors;
59 if (dwNum < 1) {
60 return 1;
61 }
62 return (int)dwNum;
63 }
64
65 struct opj_mutex_t {
66 CRITICAL_SECTION cs;
67 };
68
69 opj_mutex_t* opj_mutex_create(void)
70 {
71 opj_mutex_t* mutex = (opj_mutex_t*) opj_malloc(sizeof(opj_mutex_t));
72 if (!mutex) {
73 return NULL;
74 }
75 InitializeCriticalSectionAndSpinCount(&(mutex->cs), 4000);
76 return mutex;
77 }
78
79 void opj_mutex_lock(opj_mutex_t* mutex)
80 {
81 EnterCriticalSection(&(mutex->cs));
82 }
83
84 void opj_mutex_unlock(opj_mutex_t* mutex)
85 {
86 LeaveCriticalSection(&(mutex->cs));
87 }
88
89 void opj_mutex_destroy(opj_mutex_t* mutex)
90 {
91 if (!mutex) {
92 return;
93 }
94 DeleteCriticalSection(&(mutex->cs));
95 opj_free(mutex);
96 }
97
98 struct opj_cond_waiter_list_t {
99 HANDLE hEvent;
100 struct opj_cond_waiter_list_t* next;
101 };
102 typedef struct opj_cond_waiter_list_t opj_cond_waiter_list_t;
103
104 struct opj_cond_t {
105 opj_mutex_t *internal_mutex;
106 opj_cond_waiter_list_t *waiter_list;
107 };
108
109 static DWORD TLSKey = 0;
110 static volatile LONG inTLSLockedSection = 0;
111 static volatile int TLSKeyInit = OPJ_FALSE;
112
113 opj_cond_t* opj_cond_create(void)
114 {
115 opj_cond_t* cond = (opj_cond_t*) opj_malloc(sizeof(opj_cond_t));
116 if (!cond) {
117 return NULL;
118 }
119
120 /* Make sure that the TLS key is allocated in a thread-safe way */
121 /* We cannot use a global mutex/critical section since its creation itself would not be */
122 /* thread-safe, so use InterlockedCompareExchange trick */
123 while (OPJ_TRUE) {
124
125 #if HAVE_INTERLOCKED_COMPARE_EXCHANGE
126 if (InterlockedCompareExchange(&inTLSLockedSection, 1, 0) == 0)
127 #endif
128 {
129 if (!TLSKeyInit) {
130 TLSKey = TlsAlloc();
131 TLSKeyInit = OPJ_TRUE;
132 }
133 #if HAVE_INTERLOCKED_COMPARE_EXCHANGE
134 InterlockedCompareExchange(&inTLSLockedSection, 0, 1);
135 #endif
136 break;
137 }
138 }
139
140 if (TLSKey == TLS_OUT_OF_INDEXES) {
141 opj_free(cond);
142 return NULL;
143 }
144 cond->internal_mutex = opj_mutex_create();
145 if (cond->internal_mutex == NULL) {
146 opj_free(cond);
147 return NULL;
148 }
149 cond->waiter_list = NULL;
150 return cond;
151 }
152
153 void opj_cond_wait(opj_cond_t* cond, opj_mutex_t* mutex)
154 {
155 opj_cond_waiter_list_t* item;
156 HANDLE hEvent = (HANDLE) TlsGetValue(TLSKey);
157 if (hEvent == NULL) {
158 hEvent = CreateEvent(NULL, /* security attributes */
159 0, /* manual reset = no */
160 0, /* initial state = unsignaled */
161 NULL /* no name */);
162 assert(hEvent);
163
164 TlsSetValue(TLSKey, hEvent);
165 }
166
167 /* Insert the waiter into the waiter list of the condition */
168 opj_mutex_lock(cond->internal_mutex);
169
170 item = (opj_cond_waiter_list_t*)opj_malloc(sizeof(opj_cond_waiter_list_t));
171 assert(item != NULL);
172
173 item->hEvent = hEvent;
174 item->next = cond->waiter_list;
175
176 cond->waiter_list = item;
177
178 opj_mutex_unlock(cond->internal_mutex);
179
180 /* Release the client mutex before waiting for the event being signaled */
181 opj_mutex_unlock(mutex);
182
183 /* Ideally we would check that we do not get WAIT_FAILED but it is hard */
184 /* to report a failure. */
185 WaitForSingleObject(hEvent, INFINITE);
186
187 /* Reacquire the client mutex */
188 opj_mutex_lock(mutex);
189 }
190
191 void opj_cond_signal(opj_cond_t* cond)
192 {
193 opj_cond_waiter_list_t* psIter;
194
195 /* Signal the first registered event, and remove it from the list */
196 opj_mutex_lock(cond->internal_mutex);
197
198 psIter = cond->waiter_list;
199 if (psIter != NULL) {
200 SetEvent(psIter->hEvent);
201 cond->waiter_list = psIter->next;
202 opj_free(psIter);
203 }
204
205 opj_mutex_unlock(cond->internal_mutex);
206 }
207
208 void opj_cond_destroy(opj_cond_t* cond)
209 {
210 if (!cond) {
211 return;
212 }
213 opj_mutex_destroy(cond->internal_mutex);
214 assert(cond->waiter_list == NULL);
215 opj_free(cond);
216 }
217
218 struct opj_thread_t {
219 opj_thread_fn thread_fn;
220 void* user_data;
221 HANDLE hThread;
222 };
223
224 static unsigned int __stdcall opj_thread_callback_adapter(void *info)
225 {
226 opj_thread_t* thread = (opj_thread_t*) info;
227 HANDLE hEvent = NULL;
228
229 thread->thread_fn(thread->user_data);
230
231 /* Free the handle possible allocated by a cond */
232 while (OPJ_TRUE) {
233 /* Make sure TLSKey is not being created just at that moment... */
234 #if HAVE_INTERLOCKED_COMPARE_EXCHANGE
235 if (InterlockedCompareExchange(&inTLSLockedSection, 1, 0) == 0)
236 #endif
237 {
238 if (TLSKeyInit) {
239 hEvent = (HANDLE) TlsGetValue(TLSKey);
240 }
241 #if HAVE_INTERLOCKED_COMPARE_EXCHANGE
242 InterlockedCompareExchange(&inTLSLockedSection, 0, 1);
243 #endif
244 break;
245 }
246 }
247 if (hEvent) {
248 CloseHandle(hEvent);
249 }
250
251 return 0;
252 }
253
254 opj_thread_t* opj_thread_create(opj_thread_fn thread_fn, void* user_data)
255 {
256 opj_thread_t* thread;
257
258 assert(thread_fn);
259
260 thread = (opj_thread_t*) opj_malloc(sizeof(opj_thread_t));
261 if (!thread) {
262 return NULL;
263 }
264 thread->thread_fn = thread_fn;
265 thread->user_data = user_data;
266
267 thread->hThread = (HANDLE)_beginthreadex(NULL, 0,
268 opj_thread_callback_adapter, thread, 0, NULL);
269
270 if (thread->hThread == NULL) {
271 opj_free(thread);
272 return NULL;
273 }
274 return thread;
275 }
276
277 void opj_thread_join(opj_thread_t* thread)
278 {
279 WaitForSingleObject(thread->hThread, INFINITE);
280 CloseHandle(thread->hThread);
281
282 opj_free(thread);
283 }
284
285 #elif MUTEX_pthread
286
287 #include <pthread.h>
288 #include <stdlib.h>
289 #include <unistd.h>
290
291 /* Moved after all system includes, and in particular pthread.h, so as to */
292 /* avoid poisoning issuing with malloc() use in pthread.h with ulibc (#1013) */
293 #include "opj_includes.h"
294
295 OPJ_BOOL OPJ_CALLCONV opj_has_thread_support(void)
296 {
297 return OPJ_TRUE;
298 }
299
300 int OPJ_CALLCONV opj_get_num_cpus(void)
301 {
302 #ifdef _SC_NPROCESSORS_ONLN
303 return (int)sysconf(_SC_NPROCESSORS_ONLN);
304 #else
305 return 1;
306 #endif
307 }
308
309 struct opj_mutex_t {
310 pthread_mutex_t mutex;
311 };
312
313 opj_mutex_t* opj_mutex_create(void)
314 {
315 opj_mutex_t* mutex = (opj_mutex_t*) opj_calloc(1U, sizeof(opj_mutex_t));
316 if (mutex != NULL) {
317 if (pthread_mutex_init(&mutex->mutex, NULL) != 0) {
318 opj_free(mutex);
319 mutex = NULL;
320 }
321 }
322 return mutex;
323 }
324
325 void opj_mutex_lock(opj_mutex_t* mutex)
326 {
327 pthread_mutex_lock(&(mutex->mutex));
328 }
329
330 void opj_mutex_unlock(opj_mutex_t* mutex)
331 {
332 pthread_mutex_unlock(&(mutex->mutex));
333 }
334
335 void opj_mutex_destroy(opj_mutex_t* mutex)
336 {
337 if (!mutex) {
338 return;
339 }
340 pthread_mutex_destroy(&(mutex->mutex));
341 opj_free(mutex);
342 }
343
344 struct opj_cond_t {
345 pthread_cond_t cond;
346 };
347
348 opj_cond_t* opj_cond_create(void)
349 {
350 opj_cond_t* cond = (opj_cond_t*) opj_malloc(sizeof(opj_cond_t));
351 if (!cond) {
352 return NULL;
353 }
354 if (pthread_cond_init(&(cond->cond), NULL) != 0) {
355 opj_free(cond);
356 return NULL;
357 }
358 return cond;
359 }
360
361 void opj_cond_wait(opj_cond_t* cond, opj_mutex_t* mutex)
362 {
363 pthread_cond_wait(&(cond->cond), &(mutex->mutex));
364 }
365
366 void opj_cond_signal(opj_cond_t* cond)
367 {
368 int ret = pthread_cond_signal(&(cond->cond));
369 (void)ret;
370 assert(ret == 0);
371 }
372
373 void opj_cond_destroy(opj_cond_t* cond)
374 {
375 if (!cond) {
376 return;
377 }
378 pthread_cond_destroy(&(cond->cond));
379 opj_free(cond);
380 }
381
382
383 struct opj_thread_t {
384 opj_thread_fn thread_fn;
385 void* user_data;
386 pthread_t thread;
387 };
388
389 static void* opj_thread_callback_adapter(void* info)
390 {
391 opj_thread_t* thread = (opj_thread_t*) info;
392 thread->thread_fn(thread->user_data);
393 return NULL;
394 }
395
396 opj_thread_t* opj_thread_create(opj_thread_fn thread_fn, void* user_data)
397 {
398 pthread_attr_t attr;
399 opj_thread_t* thread;
400
401 assert(thread_fn);
402
403 thread = (opj_thread_t*) opj_malloc(sizeof(opj_thread_t));
404 if (!thread) {
405 return NULL;
406 }
407 thread->thread_fn = thread_fn;
408 thread->user_data = user_data;
409
410 pthread_attr_init(&attr);
411 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
412 if (pthread_create(&(thread->thread), &attr,
413 opj_thread_callback_adapter, (void *) thread) != 0) {
414 opj_free(thread);
415 return NULL;
416 }
417 return thread;
418 }
419
420 void opj_thread_join(opj_thread_t* thread)
421 {
422 void* status;
423 pthread_join(thread->thread, &status);
424
425 opj_free(thread);
426 }
427
428 #else
429 /* Stub implementation */
430
431 #include "opj_includes.h"
432
433 OPJ_BOOL OPJ_CALLCONV opj_has_thread_support(void)
434 {
435 return OPJ_FALSE;
436 }
437
438 int OPJ_CALLCONV opj_get_num_cpus(void)
439 {
440 return 1;
441 }
442
443 opj_mutex_t* opj_mutex_create(void)
444 {
445 return NULL;
446 }
447
448 void opj_mutex_lock(opj_mutex_t* mutex)
449 {
450 (void) mutex;
451 }
452
453 void opj_mutex_unlock(opj_mutex_t* mutex)
454 {
455 (void) mutex;
456 }
457
458 void opj_mutex_destroy(opj_mutex_t* mutex)
459 {
460 (void) mutex;
461 }
462
463 opj_cond_t* opj_cond_create(void)
464 {
465 return NULL;
466 }
467
468 void opj_cond_wait(opj_cond_t* cond, opj_mutex_t* mutex)
469 {
470 (void) cond;
471 (void) mutex;
472 }
473
474 void opj_cond_signal(opj_cond_t* cond)
475 {
476 (void) cond;
477 }
478
479 void opj_cond_destroy(opj_cond_t* cond)
480 {
481 (void) cond;
482 }
483
484 opj_thread_t* opj_thread_create(opj_thread_fn thread_fn, void* user_data)
485 {
486 (void) thread_fn;
487 (void) user_data;
488 return NULL;
489 }
490
491 void opj_thread_join(opj_thread_t* thread)
492 {
493 (void) thread;
494 }
495
496 #endif
497
498 typedef struct {
499 int key;
500 void* value;
501 opj_tls_free_func opj_free_func;
502 } opj_tls_key_val_t;
503
504 struct opj_tls_t {
505 opj_tls_key_val_t* key_val;
506 int key_val_count;
507 };
508
509 static opj_tls_t* opj_tls_new(void)
510 {
511 return (opj_tls_t*) opj_calloc(1, sizeof(opj_tls_t));
512 }
513
514 static void opj_tls_destroy(opj_tls_t* tls)
515 {
516 int i;
517 if (!tls) {
518 return;
519 }
520 for (i = 0; i < tls->key_val_count; i++) {
521 if (tls->key_val[i].opj_free_func) {
522 tls->key_val[i].opj_free_func(tls->key_val[i].value);
523 }
524 }
525 opj_free(tls->key_val);
526 opj_free(tls);
527 }
528
529 void* opj_tls_get(opj_tls_t* tls, int key)
530 {
531 int i;
532 for (i = 0; i < tls->key_val_count; i++) {
533 if (tls->key_val[i].key == key) {
534 return tls->key_val[i].value;
535 }
536 }
537 return NULL;
538 }
539
540 OPJ_BOOL opj_tls_set(opj_tls_t* tls, int key, void* value,
541 opj_tls_free_func opj_free_func)
542 {
543 opj_tls_key_val_t* new_key_val;
544 int i;
545
546 if (tls->key_val_count == INT_MAX) {
547 return OPJ_FALSE;
548 }
549 for (i = 0; i < tls->key_val_count; i++) {
550 if (tls->key_val[i].key == key) {
551 if (tls->key_val[i].opj_free_func) {
552 tls->key_val[i].opj_free_func(tls->key_val[i].value);
553 }
554 tls->key_val[i].value = value;
555 tls->key_val[i].opj_free_func = opj_free_func;
556 return OPJ_TRUE;
557 }
558 }
559 new_key_val = (opj_tls_key_val_t*) opj_realloc(tls->key_val,
560 ((size_t)tls->key_val_count + 1U) * sizeof(opj_tls_key_val_t));
561 if (!new_key_val) {
562 return OPJ_FALSE;
563 }
564 tls->key_val = new_key_val;
565 new_key_val[tls->key_val_count].key = key;
566 new_key_val[tls->key_val_count].value = value;
567 new_key_val[tls->key_val_count].opj_free_func = opj_free_func;
568 tls->key_val_count ++;
569 return OPJ_TRUE;
570 }
571
572
573 typedef struct {
574 opj_job_fn job_fn;
575 void *user_data;
576 } opj_worker_thread_job_t;
577
578 typedef struct {
579 opj_thread_pool_t *tp;
580 opj_thread_t *thread;
581 int marked_as_waiting;
582
583 opj_mutex_t *mutex;
584 opj_cond_t *cond;
585 } opj_worker_thread_t;
586
587 typedef enum {
588 OPJWTS_OK,
589 OPJWTS_STOP,
590 OPJWTS_ERROR
591 } opj_worker_thread_state;
592
593 struct opj_job_list_t {
594 opj_worker_thread_job_t* job;
595 struct opj_job_list_t* next;
596 };
597 typedef struct opj_job_list_t opj_job_list_t;
598
599 struct opj_worker_thread_list_t {
600 opj_worker_thread_t* worker_thread;
601 struct opj_worker_thread_list_t* next;
602 };
603 typedef struct opj_worker_thread_list_t opj_worker_thread_list_t;
604
605 struct opj_thread_pool_t {
606 opj_worker_thread_t* worker_threads;
607 int worker_threads_count;
608 opj_cond_t* cond;
609 opj_mutex_t* mutex;
610 volatile opj_worker_thread_state state;
611 opj_job_list_t* job_queue;
612 volatile int pending_jobs_count;
613 opj_worker_thread_list_t* waiting_worker_thread_list;
614 int waiting_worker_thread_count;
615 opj_tls_t* tls;
616 int signaling_threshold;
617 };
618
619 static OPJ_BOOL opj_thread_pool_setup(opj_thread_pool_t* tp, int num_threads);
620 static opj_worker_thread_job_t* opj_thread_pool_get_next_job(
621 opj_thread_pool_t* tp,
622 opj_worker_thread_t* worker_thread,
623 OPJ_BOOL signal_job_finished);
624
625 opj_thread_pool_t* opj_thread_pool_create(int num_threads)
626 {
627 opj_thread_pool_t* tp;
628
629 tp = (opj_thread_pool_t*) opj_calloc(1, sizeof(opj_thread_pool_t));
630 if (!tp) {
631 return NULL;
632 }
633 tp->state = OPJWTS_OK;
634
635 if (num_threads <= 0) {
636 tp->tls = opj_tls_new();
637 if (!tp->tls) {
638 opj_free(tp);
639 tp = NULL;
640 }
641 return tp;
642 }
643
644 tp->mutex = opj_mutex_create();
645 if (!tp->mutex) {
646 opj_free(tp);
647 return NULL;
648 }
649 if (!opj_thread_pool_setup(tp, num_threads)) {
650 opj_thread_pool_destroy(tp);
651 return NULL;
652 }
653 return tp;
654 }
655
656 static void opj_worker_thread_function(void* user_data)
657 {
658 opj_worker_thread_t* worker_thread;
659 opj_thread_pool_t* tp;
660 opj_tls_t* tls;
661 OPJ_BOOL job_finished = OPJ_FALSE;
662
663 worker_thread = (opj_worker_thread_t*) user_data;
664 tp = worker_thread->tp;
665 tls = opj_tls_new();
666
667 while (OPJ_TRUE) {
668 opj_worker_thread_job_t* job = opj_thread_pool_get_next_job(tp, worker_thread,
669 job_finished);
670 if (job == NULL) {
671 break;
672 }
673
674 if (job->job_fn) {
675 job->job_fn(job->user_data, tls);
676 }
677 opj_free(job);
678 job_finished = OPJ_TRUE;
679 }
680
681 opj_tls_destroy(tls);
682 }
683
684 static OPJ_BOOL opj_thread_pool_setup(opj_thread_pool_t* tp, int num_threads)
685 {
686 int i;
687 OPJ_BOOL bRet = OPJ_TRUE;
688
689 assert(num_threads > 0);
690
691 tp->cond = opj_cond_create();
692 if (tp->cond == NULL) {
693 return OPJ_FALSE;
694 }
695
696 tp->worker_threads = (opj_worker_thread_t*) opj_calloc((size_t)num_threads,
697 sizeof(opj_worker_thread_t));
698 if (tp->worker_threads == NULL) {
699 return OPJ_FALSE;
700 }
701 tp->worker_threads_count = num_threads;
702
703 for (i = 0; i < num_threads; i++) {
704 tp->worker_threads[i].tp = tp;
705
706 tp->worker_threads[i].mutex = opj_mutex_create();
707 if (tp->worker_threads[i].mutex == NULL) {
708 tp->worker_threads_count = i;
709 bRet = OPJ_FALSE;
710 break;
711 }
712
713 tp->worker_threads[i].cond = opj_cond_create();
714 if (tp->worker_threads[i].cond == NULL) {
715 opj_mutex_destroy(tp->worker_threads[i].mutex);
716 tp->worker_threads_count = i;
717 bRet = OPJ_FALSE;
718 break;
719 }
720
721 tp->worker_threads[i].marked_as_waiting = OPJ_FALSE;
722
723 tp->worker_threads[i].thread = opj_thread_create(opj_worker_thread_function,
724 &(tp->worker_threads[i]));
725 if (tp->worker_threads[i].thread == NULL) {
726 opj_mutex_destroy(tp->worker_threads[i].mutex);
727 opj_cond_destroy(tp->worker_threads[i].cond);
728 tp->worker_threads_count = i;
729 bRet = OPJ_FALSE;
730 break;
731 }
732 }
733
734 /* Wait all threads to be started */
735 /* printf("waiting for all threads to be started\n"); */
736 opj_mutex_lock(tp->mutex);
737 while (tp->waiting_worker_thread_count < tp->worker_threads_count) {
738 opj_cond_wait(tp->cond, tp->mutex);
739 }
740 opj_mutex_unlock(tp->mutex);
741 /* printf("all threads started\n"); */
742
743 if (tp->state == OPJWTS_ERROR) {
744 bRet = OPJ_FALSE;
745 }
746
747 return bRet;
748 }
749
750 /*
751 void opj_waiting()
752 {
753 printf("waiting!\n");
754 }
755 */
756
757 static opj_worker_thread_job_t* opj_thread_pool_get_next_job(
758 opj_thread_pool_t* tp,
759 opj_worker_thread_t* worker_thread,
760 OPJ_BOOL signal_job_finished)
761 {
762 while (OPJ_TRUE) {
763 opj_job_list_t* top_job_iter;
764
765 opj_mutex_lock(tp->mutex);
766
767 if (signal_job_finished) {
768 signal_job_finished = OPJ_FALSE;
769 tp->pending_jobs_count --;
770 /*printf("tp=%p, remaining jobs: %d\n", tp, tp->pending_jobs_count);*/
771 if (tp->pending_jobs_count <= tp->signaling_threshold) {
772 opj_cond_signal(tp->cond);
773 }
774 }
775
776 if (tp->state == OPJWTS_STOP) {
777 opj_mutex_unlock(tp->mutex);
778 return NULL;
779 }
780 top_job_iter = tp->job_queue;
781 if (top_job_iter) {
782 opj_worker_thread_job_t* job;
783 tp->job_queue = top_job_iter->next;
784
785 job = top_job_iter->job;
786 opj_mutex_unlock(tp->mutex);
787 opj_free(top_job_iter);
788 return job;
789 }
790
791 /* opj_waiting(); */
792 if (!worker_thread->marked_as_waiting) {
793 opj_worker_thread_list_t* item;
794
795 worker_thread->marked_as_waiting = OPJ_TRUE;
796 tp->waiting_worker_thread_count ++;
797 assert(tp->waiting_worker_thread_count <= tp->worker_threads_count);
798
799 item = (opj_worker_thread_list_t*) opj_malloc(sizeof(opj_worker_thread_list_t));
800 if (item == NULL) {
801 tp->state = OPJWTS_ERROR;
802 opj_cond_signal(tp->cond);
803
804 opj_mutex_unlock(tp->mutex);
805 return NULL;
806 }
807
808 item->worker_thread = worker_thread;
809 item->next = tp->waiting_worker_thread_list;
810 tp->waiting_worker_thread_list = item;
811 }
812
813 /* printf("signaling that worker thread is ready\n"); */
814 opj_cond_signal(tp->cond);
815
816 opj_mutex_lock(worker_thread->mutex);
817 opj_mutex_unlock(tp->mutex);
818
819 /* printf("waiting for job\n"); */
820 opj_cond_wait(worker_thread->cond, worker_thread->mutex);
821
822 opj_mutex_unlock(worker_thread->mutex);
823 /* printf("got job\n"); */
824 }
825 }
826
827 OPJ_BOOL opj_thread_pool_submit_job(opj_thread_pool_t* tp,
828 opj_job_fn job_fn,
829 void* user_data)
830 {
831 opj_worker_thread_job_t* job;
832 opj_job_list_t* item;
833
834 if (tp->mutex == NULL) {
835 job_fn(user_data, tp->tls);
836 return OPJ_TRUE;
837 }
838
839 job = (opj_worker_thread_job_t*)opj_malloc(sizeof(opj_worker_thread_job_t));
840 if (job == NULL) {
841 return OPJ_FALSE;
842 }
843 job->job_fn = job_fn;
844 job->user_data = user_data;
845
846 item = (opj_job_list_t*) opj_malloc(sizeof(opj_job_list_t));
847 if (item == NULL) {
848 opj_free(job);
849 return OPJ_FALSE;
850 }
851 item->job = job;
852
853 opj_mutex_lock(tp->mutex);
854
855 tp->signaling_threshold = 100 * tp->worker_threads_count;
856 while (tp->pending_jobs_count > tp->signaling_threshold) {
857 /* printf("%d jobs enqueued. Waiting\n", tp->pending_jobs_count); */
858 opj_cond_wait(tp->cond, tp->mutex);
859 /* printf("...%d jobs enqueued.\n", tp->pending_jobs_count); */
860 }
861
862 item->next = tp->job_queue;
863 tp->job_queue = item;
864 tp->pending_jobs_count ++;
865
866 if (tp->waiting_worker_thread_list) {
867 opj_worker_thread_t* worker_thread;
868 opj_worker_thread_list_t* next;
869 opj_worker_thread_list_t* to_opj_free;
870
871 worker_thread = tp->waiting_worker_thread_list->worker_thread;
872
873 assert(worker_thread->marked_as_waiting);
874 worker_thread->marked_as_waiting = OPJ_FALSE;
875
876 next = tp->waiting_worker_thread_list->next;
877 to_opj_free = tp->waiting_worker_thread_list;
878 tp->waiting_worker_thread_list = next;
879 tp->waiting_worker_thread_count --;
880
881 opj_mutex_lock(worker_thread->mutex);
882 opj_mutex_unlock(tp->mutex);
883 opj_cond_signal(worker_thread->cond);
884 opj_mutex_unlock(worker_thread->mutex);
885
886 opj_free(to_opj_free);
887 } else {
888 opj_mutex_unlock(tp->mutex);
889 }
890
891 return OPJ_TRUE;
892 }
893
894 void opj_thread_pool_wait_completion(opj_thread_pool_t* tp,
895 int max_remaining_jobs)
896 {
897 if (tp->mutex == NULL) {
898 return;
899 }
900
901 if (max_remaining_jobs < 0) {
902 max_remaining_jobs = 0;
903 }
904 opj_mutex_lock(tp->mutex);
905 tp->signaling_threshold = max_remaining_jobs;
906 while (tp->pending_jobs_count > max_remaining_jobs) {
907 /*printf("tp=%p, jobs before wait = %d, max_remaining_jobs = %d\n", tp, tp->pending_jobs_count, max_remaining_jobs);*/
908 opj_cond_wait(tp->cond, tp->mutex);
909 /*printf("tp=%p, jobs after wait = %d\n", tp, tp->pending_jobs_count);*/
910 }
911 opj_mutex_unlock(tp->mutex);
912 }
913
914 int opj_thread_pool_get_thread_count(opj_thread_pool_t* tp)
915 {
916 return tp->worker_threads_count;
917 }
918
919 void opj_thread_pool_destroy(opj_thread_pool_t* tp)
920 {
921 if (!tp) {
922 return;
923 }
924 if (tp->cond) {
925 int i;
926 opj_thread_pool_wait_completion(tp, 0);
927
928 opj_mutex_lock(tp->mutex);
929 tp->state = OPJWTS_STOP;
930 opj_mutex_unlock(tp->mutex);
931
932 for (i = 0; i < tp->worker_threads_count; i++) {
933 opj_mutex_lock(tp->worker_threads[i].mutex);
934 opj_cond_signal(tp->worker_threads[i].cond);
935 opj_mutex_unlock(tp->worker_threads[i].mutex);
936 opj_thread_join(tp->worker_threads[i].thread);
937 opj_cond_destroy(tp->worker_threads[i].cond);
938 opj_mutex_destroy(tp->worker_threads[i].mutex);
939 }
940
941 opj_free(tp->worker_threads);
942
943 while (tp->waiting_worker_thread_list != NULL) {
944 opj_worker_thread_list_t* next = tp->waiting_worker_thread_list->next;
945 opj_free(tp->waiting_worker_thread_list);
946 tp->waiting_worker_thread_list = next;
947 }
948
949 opj_cond_destroy(tp->cond);
950 }
951 opj_mutex_destroy(tp->mutex);
952 opj_tls_destroy(tp->tls);
953 opj_free(tp);
954 }