src/gba/gba-thread.c (view raw)
1/* Copyright (c) 2013-2014 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "gba-thread.h"
7
8#include "arm.h"
9#include "gba.h"
10#include "gba-config.h"
11#include "gba-serialize.h"
12
13#include "debugger/debugger.h"
14
15#include "util/patch.h"
16#include "util/png-io.h"
17#include "util/vfs.h"
18
19#include "platform/commandline.h"
20
21#include <signal.h>
22
23static const float _defaultFPSTarget = 60.f;
24
25#ifdef USE_PTHREADS
26static pthread_key_t _contextKey;
27static pthread_once_t _contextOnce = PTHREAD_ONCE_INIT;
28
29static void _createTLS(void) {
30 pthread_key_create(&_contextKey, 0);
31}
32#elif _WIN32
33static DWORD _contextKey;
34static INIT_ONCE _contextOnce = INIT_ONCE_STATIC_INIT;
35
36static BOOL CALLBACK _createTLS(PINIT_ONCE once, PVOID param, PVOID* context) {
37 UNUSED(once);
38 UNUSED(param);
39 UNUSED(context);
40 _contextKey = TlsAlloc();
41 return TRUE;
42}
43#endif
44
45#ifndef DISABLE_THREADING
46static void _changeState(struct GBAThread* threadContext, enum ThreadState newState, bool broadcast) {
47 MutexLock(&threadContext->stateMutex);
48 threadContext->state = newState;
49 if (broadcast) {
50 ConditionWake(&threadContext->stateCond);
51 }
52 MutexUnlock(&threadContext->stateMutex);
53}
54
55static void _waitOnInterrupt(struct GBAThread* threadContext) {
56 while (threadContext->state == THREAD_INTERRUPTED) {
57 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
58 }
59}
60
61static void _waitUntilNotState(struct GBAThread* threadContext, enum ThreadState oldState) {
62 while (threadContext->state == oldState) {
63 MutexUnlock(&threadContext->stateMutex);
64
65 MutexLock(&threadContext->sync.videoFrameMutex);
66 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
67 MutexUnlock(&threadContext->sync.videoFrameMutex);
68
69 MutexLock(&threadContext->sync.audioBufferMutex);
70 ConditionWake(&threadContext->sync.audioRequiredCond);
71 MutexUnlock(&threadContext->sync.audioBufferMutex);
72
73 MutexLock(&threadContext->stateMutex);
74 ConditionWake(&threadContext->stateCond);
75 }
76}
77
78static void _pauseThread(struct GBAThread* threadContext, bool onThread) {
79 if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
80 threadContext->debugger->state = DEBUGGER_EXITING;
81 }
82 threadContext->state = THREAD_PAUSING;
83 if (!onThread) {
84 _waitUntilNotState(threadContext, THREAD_PAUSING);
85 }
86}
87#endif
88
89static void _changeVideoSync(struct GBASync* sync, bool frameOn) {
90 // Make sure the video thread can process events while the GBA thread is paused
91 MutexLock(&sync->videoFrameMutex);
92 if (frameOn != sync->videoFrameOn) {
93 sync->videoFrameOn = frameOn;
94 ConditionWake(&sync->videoFrameAvailableCond);
95 }
96 MutexUnlock(&sync->videoFrameMutex);
97}
98
99#ifndef DISABLE_THREADING
100static THREAD_ENTRY _GBAThreadRun(void* context) {
101#ifdef USE_PTHREADS
102 pthread_once(&_contextOnce, _createTLS);
103#else
104 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
105#endif
106
107 struct GBA gba;
108 struct ARMCore cpu;
109 struct Patch patch;
110 struct GBAThread* threadContext = context;
111 struct ARMComponent* components[1] = {};
112 int numComponents = 0;
113
114 if (threadContext->debugger) {
115 components[numComponents] = &threadContext->debugger->d;
116 ++numComponents;
117 }
118
119#if !defined(_WIN32) && defined(USE_PTHREADS)
120 sigset_t signals;
121 sigemptyset(&signals);
122 pthread_sigmask(SIG_SETMASK, &signals, 0);
123#endif
124
125 GBACreate(&gba);
126 ARMSetComponents(&cpu, &gba.d, numComponents, components);
127 ARMInit(&cpu);
128 gba.sync = &threadContext->sync;
129 threadContext->gba = &gba;
130 gba.logLevel = threadContext->logLevel;
131#ifdef USE_PTHREADS
132 pthread_setspecific(_contextKey, threadContext);
133#else
134 TlsSetValue(_contextKey, threadContext);
135#endif
136
137 if (threadContext->audioBuffers) {
138 GBAAudioResizeBuffer(&gba.audio, threadContext->audioBuffers);
139 } else {
140 threadContext->audioBuffers = GBA_AUDIO_SAMPLES;
141 }
142
143 if (threadContext->renderer) {
144 GBAVideoAssociateRenderer(&gba.video, threadContext->renderer);
145 }
146
147 if (threadContext->rom) {
148 GBALoadROM(&gba, threadContext->rom, threadContext->save, threadContext->fname);
149 if (threadContext->bios) {
150 GBALoadBIOS(&gba, threadContext->bios);
151 }
152
153 if (threadContext->patch && loadPatch(threadContext->patch, &patch)) {
154 GBAApplyPatch(&gba, &patch);
155 }
156 }
157
158 ARMReset(&cpu);
159
160 if (threadContext->debugger) {
161 threadContext->debugger->log = GBADebuggerLogShim;
162 GBAAttachDebugger(&gba, threadContext->debugger);
163 ARMDebuggerEnter(threadContext->debugger, DEBUGGER_ENTER_ATTACHED);
164 }
165
166 GBASIOSetDriverSet(&gba.sio, &threadContext->sioDrivers);
167
168 gba.keySource = &threadContext->activeKeys;
169
170 if (threadContext->startCallback) {
171 threadContext->startCallback(threadContext);
172 }
173
174 _changeState(threadContext, THREAD_RUNNING, true);
175
176 while (threadContext->state < THREAD_EXITING) {
177 if (threadContext->debugger) {
178 struct ARMDebugger* debugger = threadContext->debugger;
179 ARMDebuggerRun(debugger);
180 if (debugger->state == DEBUGGER_SHUTDOWN) {
181 _changeState(threadContext, THREAD_EXITING, false);
182 }
183 } else {
184 while (threadContext->state == THREAD_RUNNING) {
185 ARMRunLoop(&cpu);
186 }
187 }
188
189 int resetScheduled = 0;
190 MutexLock(&threadContext->stateMutex);
191 while (threadContext->state > THREAD_RUNNING && threadContext->state < THREAD_EXITING) {
192 if (threadContext->state == THREAD_PAUSING) {
193 threadContext->state = THREAD_PAUSED;
194 ConditionWake(&threadContext->stateCond);
195 }
196 if (threadContext->state == THREAD_INTERRUPTING) {
197 threadContext->state = THREAD_INTERRUPTED;
198 ConditionWake(&threadContext->stateCond);
199 }
200 if (threadContext->state == THREAD_RESETING) {
201 threadContext->state = THREAD_RUNNING;
202 resetScheduled = 1;
203 }
204 while (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_INTERRUPTED) {
205 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
206 }
207 }
208 MutexUnlock(&threadContext->stateMutex);
209 if (resetScheduled) {
210 ARMReset(&cpu);
211 }
212 }
213
214 while (threadContext->state != THREAD_SHUTDOWN) {
215 _changeState(threadContext, THREAD_SHUTDOWN, false);
216 }
217
218 if (threadContext->cleanCallback) {
219 threadContext->cleanCallback(threadContext);
220 }
221
222 threadContext->gba = 0;
223 ARMDeinit(&cpu);
224 GBADestroy(&gba);
225
226 threadContext->sync.videoFrameOn = false;
227 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
228 ConditionWake(&threadContext->sync.audioRequiredCond);
229
230 return 0;
231}
232
233void GBAMapOptionsToContext(const struct GBAOptions* opts, struct GBAThread* threadContext) {
234 threadContext->bios = VFileOpen(opts->bios, O_RDONLY);
235 threadContext->frameskip = opts->frameskip;
236 threadContext->logLevel = opts->logLevel;
237 threadContext->rewindBufferCapacity = opts->rewindBufferCapacity;
238 threadContext->rewindBufferInterval = opts->rewindBufferInterval;
239 threadContext->sync.audioWait = opts->audioSync;
240 threadContext->sync.videoFrameWait = opts->videoSync;
241
242 if (opts->fpsTarget) {
243 threadContext->fpsTarget = opts->fpsTarget;
244 }
245
246 if (opts->audioBuffers) {
247 threadContext->audioBuffers = opts->audioBuffers;
248 }
249}
250
251void GBAMapArgumentsToContext(const struct GBAArguments* args, struct GBAThread* threadContext) {
252 if (args->dirmode) {
253 threadContext->gameDir = VDirOpen(args->fname);
254 threadContext->stateDir = threadContext->gameDir;
255 } else {
256 threadContext->rom = VFileOpen(args->fname, O_RDONLY);
257#if ENABLE_LIBZIP
258 threadContext->gameDir = VDirOpenZip(args->fname, 0);
259#endif
260 }
261 threadContext->fname = args->fname;
262 threadContext->patch = VFileOpen(args->patch, O_RDONLY);
263}
264
265bool GBAThreadStart(struct GBAThread* threadContext) {
266 // TODO: error check
267 threadContext->activeKeys = 0;
268 threadContext->state = THREAD_INITIALIZED;
269 threadContext->sync.videoFrameOn = true;
270 threadContext->sync.videoFrameSkip = 0;
271
272 threadContext->rewindBufferNext = threadContext->rewindBufferInterval;
273 threadContext->rewindBufferSize = 0;
274 if (threadContext->rewindBufferCapacity) {
275 threadContext->rewindBuffer = calloc(threadContext->rewindBufferCapacity, sizeof(void*));
276 } else {
277 threadContext->rewindBuffer = 0;
278 }
279
280 if (!threadContext->fpsTarget) {
281 threadContext->fpsTarget = _defaultFPSTarget;
282 }
283
284 if (threadContext->rom && !GBAIsROM(threadContext->rom)) {
285 threadContext->rom->close(threadContext->rom);
286 threadContext->rom = 0;
287 }
288
289 if (threadContext->gameDir) {
290 threadContext->gameDir->rewind(threadContext->gameDir);
291 struct VDirEntry* dirent = threadContext->gameDir->listNext(threadContext->gameDir);
292 while (dirent) {
293 struct Patch patchTemp;
294 struct VFile* vf = threadContext->gameDir->openFile(threadContext->gameDir, dirent->name(dirent), O_RDONLY);
295 if (!vf) {
296 continue;
297 }
298 if (!threadContext->rom && GBAIsROM(vf)) {
299 threadContext->rom = vf;
300 } else if (!threadContext->patch && loadPatch(vf, &patchTemp)) {
301 threadContext->patch = vf;
302 } else {
303 vf->close(vf);
304 }
305 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
306 }
307
308 }
309
310 if (!threadContext->rom) {
311 threadContext->state = THREAD_SHUTDOWN;
312 return false;
313 }
314
315 threadContext->save = VDirOptionalOpenFile(threadContext->stateDir, threadContext->fname, "sram", ".sav", O_CREAT | O_RDWR);
316
317 MutexInit(&threadContext->stateMutex);
318 ConditionInit(&threadContext->stateCond);
319
320 MutexInit(&threadContext->sync.videoFrameMutex);
321 ConditionInit(&threadContext->sync.videoFrameAvailableCond);
322 ConditionInit(&threadContext->sync.videoFrameRequiredCond);
323 MutexInit(&threadContext->sync.audioBufferMutex);
324 ConditionInit(&threadContext->sync.audioRequiredCond);
325
326 threadContext->interruptDepth = 0;
327
328#ifndef _WIN32
329 sigset_t signals;
330 sigemptyset(&signals);
331 sigaddset(&signals, SIGINT);
332 sigaddset(&signals, SIGTRAP);
333 pthread_sigmask(SIG_BLOCK, &signals, 0);
334#endif
335
336 MutexLock(&threadContext->stateMutex);
337 ThreadCreate(&threadContext->thread, _GBAThreadRun, threadContext);
338 while (threadContext->state < THREAD_RUNNING) {
339 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
340 }
341 MutexUnlock(&threadContext->stateMutex);
342
343 return true;
344}
345
346bool GBAThreadHasStarted(struct GBAThread* threadContext) {
347 bool hasStarted;
348 MutexLock(&threadContext->stateMutex);
349 hasStarted = threadContext->state > THREAD_INITIALIZED;
350 MutexUnlock(&threadContext->stateMutex);
351 return hasStarted;
352}
353
354void GBAThreadEnd(struct GBAThread* threadContext) {
355 MutexLock(&threadContext->stateMutex);
356 if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
357 threadContext->debugger->state = DEBUGGER_EXITING;
358 }
359 threadContext->state = THREAD_EXITING;
360 ConditionWake(&threadContext->stateCond);
361 MutexUnlock(&threadContext->stateMutex);
362 MutexLock(&threadContext->sync.audioBufferMutex);
363 threadContext->sync.audioWait = 0;
364 ConditionWake(&threadContext->sync.audioRequiredCond);
365 MutexUnlock(&threadContext->sync.audioBufferMutex);
366}
367
368void GBAThreadReset(struct GBAThread* threadContext) {
369 MutexLock(&threadContext->stateMutex);
370 _waitOnInterrupt(threadContext);
371 threadContext->state = THREAD_RESETING;
372 ConditionWake(&threadContext->stateCond);
373 MutexUnlock(&threadContext->stateMutex);
374}
375
376void GBAThreadJoin(struct GBAThread* threadContext) {
377 MutexLock(&threadContext->sync.videoFrameMutex);
378 threadContext->sync.videoFrameWait = 0;
379 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
380 MutexUnlock(&threadContext->sync.videoFrameMutex);
381
382 ThreadJoin(threadContext->thread);
383
384 MutexDeinit(&threadContext->stateMutex);
385 ConditionDeinit(&threadContext->stateCond);
386
387 MutexDeinit(&threadContext->sync.videoFrameMutex);
388 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
389 ConditionDeinit(&threadContext->sync.videoFrameAvailableCond);
390 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
391 ConditionDeinit(&threadContext->sync.videoFrameRequiredCond);
392
393 ConditionWake(&threadContext->sync.audioRequiredCond);
394 ConditionDeinit(&threadContext->sync.audioRequiredCond);
395 MutexDeinit(&threadContext->sync.audioBufferMutex);
396
397 int i;
398 for (i = 0; i < threadContext->rewindBufferCapacity; ++i) {
399 if (threadContext->rewindBuffer[i]) {
400 GBADeallocateState(threadContext->rewindBuffer[i]);
401 }
402 }
403 free(threadContext->rewindBuffer);
404
405 if (threadContext->rom) {
406 threadContext->rom->close(threadContext->rom);
407 threadContext->rom = 0;
408 }
409
410 if (threadContext->save) {
411 threadContext->save->close(threadContext->save);
412 threadContext->save = 0;
413 }
414
415 if (threadContext->bios) {
416 threadContext->bios->close(threadContext->bios);
417 threadContext->bios = 0;
418 }
419
420 if (threadContext->patch) {
421 threadContext->patch->close(threadContext->patch);
422 threadContext->patch = 0;
423 }
424
425 if (threadContext->gameDir) {
426 if (threadContext->stateDir == threadContext->gameDir) {
427 threadContext->stateDir = 0;
428 }
429 threadContext->gameDir->close(threadContext->gameDir);
430 threadContext->gameDir = 0;
431 }
432
433 if (threadContext->stateDir) {
434 threadContext->stateDir->close(threadContext->stateDir);
435 threadContext->stateDir = 0;
436 }
437}
438
439bool GBAThreadIsActive(struct GBAThread* threadContext) {
440 return threadContext->state >= THREAD_RUNNING && threadContext->state < THREAD_EXITING;
441}
442
443void GBAThreadInterrupt(struct GBAThread* threadContext) {
444 MutexLock(&threadContext->stateMutex);
445 ++threadContext->interruptDepth;
446 if (threadContext->interruptDepth > 1 || !GBAThreadIsActive(threadContext)) {
447 MutexUnlock(&threadContext->stateMutex);
448 return;
449 }
450 threadContext->savedState = threadContext->state;
451 _waitOnInterrupt(threadContext);
452 threadContext->state = THREAD_INTERRUPTING;
453 if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
454 threadContext->debugger->state = DEBUGGER_EXITING;
455 }
456 ConditionWake(&threadContext->stateCond);
457 _waitUntilNotState(threadContext, THREAD_INTERRUPTING);
458 MutexUnlock(&threadContext->stateMutex);
459}
460
461void GBAThreadContinue(struct GBAThread* threadContext) {
462 MutexLock(&threadContext->stateMutex);
463 --threadContext->interruptDepth;
464 if (threadContext->interruptDepth < 1 && GBAThreadIsActive(threadContext)) {
465 threadContext->state = threadContext->savedState;
466 ConditionWake(&threadContext->stateCond);
467 }
468 MutexUnlock(&threadContext->stateMutex);
469}
470
471void GBAThreadPause(struct GBAThread* threadContext) {
472 bool frameOn = true;
473 MutexLock(&threadContext->stateMutex);
474 _waitOnInterrupt(threadContext);
475 if (threadContext->state == THREAD_RUNNING) {
476 _pauseThread(threadContext, false);
477 frameOn = false;
478 }
479 MutexUnlock(&threadContext->stateMutex);
480
481 _changeVideoSync(&threadContext->sync, frameOn);
482}
483
484void GBAThreadUnpause(struct GBAThread* threadContext) {
485 MutexLock(&threadContext->stateMutex);
486 _waitOnInterrupt(threadContext);
487 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
488 threadContext->state = THREAD_RUNNING;
489 ConditionWake(&threadContext->stateCond);
490 }
491 MutexUnlock(&threadContext->stateMutex);
492
493 _changeVideoSync(&threadContext->sync, true);
494}
495
496bool GBAThreadIsPaused(struct GBAThread* threadContext) {
497 bool isPaused;
498 MutexLock(&threadContext->stateMutex);
499 _waitOnInterrupt(threadContext);
500 isPaused = threadContext->state == THREAD_PAUSED;
501 MutexUnlock(&threadContext->stateMutex);
502 return isPaused;
503}
504
505void GBAThreadTogglePause(struct GBAThread* threadContext) {
506 bool frameOn = true;
507 MutexLock(&threadContext->stateMutex);
508 _waitOnInterrupt(threadContext);
509 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
510 threadContext->state = THREAD_RUNNING;
511 ConditionWake(&threadContext->stateCond);
512 } else if (threadContext->state == THREAD_RUNNING) {
513 _pauseThread(threadContext, false);
514 frameOn = false;
515 }
516 MutexUnlock(&threadContext->stateMutex);
517
518 _changeVideoSync(&threadContext->sync, frameOn);
519}
520
521void GBAThreadPauseFromThread(struct GBAThread* threadContext) {
522 bool frameOn = true;
523 MutexLock(&threadContext->stateMutex);
524 _waitOnInterrupt(threadContext);
525 if (threadContext->state == THREAD_RUNNING) {
526 _pauseThread(threadContext, true);
527 frameOn = false;
528 }
529 MutexUnlock(&threadContext->stateMutex);
530
531 _changeVideoSync(&threadContext->sync, frameOn);
532}
533
534#ifdef USE_PTHREADS
535struct GBAThread* GBAThreadGetContext(void) {
536 pthread_once(&_contextOnce, _createTLS);
537 return pthread_getspecific(_contextKey);
538}
539#elif _WIN32
540struct GBAThread* GBAThreadGetContext(void) {
541 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
542 return TlsGetValue(_contextKey);
543}
544#endif
545
546#ifdef USE_PNG
547void GBAThreadTakeScreenshot(struct GBAThread* threadContext) {
548 unsigned stride;
549 void* pixels = 0;
550 struct VFile* vf = VDirOptionalOpenIncrementFile(threadContext->stateDir, threadContext->gba->activeFile, "screenshot", "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
551 threadContext->gba->video.renderer->getPixels(threadContext->gba->video.renderer, &stride, &pixels);
552 png_structp png = PNGWriteOpen(vf);
553 png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
554 PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
555 PNGWriteClose(png, info);
556 vf->close(vf);
557}
558#endif
559
560#else
561struct GBAThread* GBAThreadGetContext(void) {
562 return 0;
563}
564#endif
565
566void GBASyncPostFrame(struct GBASync* sync) {
567 if (!sync) {
568 return;
569 }
570
571 MutexLock(&sync->videoFrameMutex);
572 ++sync->videoFramePending;
573 --sync->videoFrameSkip;
574 if (sync->videoFrameSkip < 0) {
575 do {
576 ConditionWake(&sync->videoFrameAvailableCond);
577 if (sync->videoFrameWait) {
578 ConditionWait(&sync->videoFrameRequiredCond, &sync->videoFrameMutex);
579 }
580 } while (sync->videoFrameWait && sync->videoFramePending);
581 }
582 MutexUnlock(&sync->videoFrameMutex);
583
584 struct GBAThread* thread = GBAThreadGetContext();
585 if (!thread) {
586 return;
587 }
588
589 if (thread->rewindBuffer) {
590 --thread->rewindBufferNext;
591 if (thread->rewindBufferNext <= 0) {
592 thread->rewindBufferNext = thread->rewindBufferInterval;
593 GBARecordFrame(thread);
594 }
595 }
596 if (thread->stream) {
597 thread->stream->postVideoFrame(thread->stream, thread->renderer);
598 }
599 if (thread->frameCallback) {
600 thread->frameCallback(thread);
601 }
602}
603
604bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip) {
605 if (!sync) {
606 return true;
607 }
608
609 MutexLock(&sync->videoFrameMutex);
610 ConditionWake(&sync->videoFrameRequiredCond);
611 if (!sync->videoFrameOn && !sync->videoFramePending) {
612 return false;
613 }
614 if (sync->videoFrameOn && !sync->videoFramePending) {
615 ConditionWait(&sync->videoFrameAvailableCond, &sync->videoFrameMutex);
616 }
617 sync->videoFramePending = 0;
618 sync->videoFrameSkip = frameskip;
619 return true;
620}
621
622void GBASyncWaitFrameEnd(struct GBASync* sync) {
623 if (!sync) {
624 return;
625 }
626
627 MutexUnlock(&sync->videoFrameMutex);
628}
629
630bool GBASyncDrawingFrame(struct GBASync* sync) {
631 if (!sync) {
632 return true;
633 }
634
635 return sync->videoFrameSkip <= 0;
636}
637
638void GBASyncSuspendDrawing(struct GBASync* sync) {
639 if (!sync) {
640 return;
641 }
642
643 _changeVideoSync(sync, false);
644}
645
646void GBASyncResumeDrawing(struct GBASync* sync) {
647 if (!sync) {
648 return;
649 }
650
651 _changeVideoSync(sync, true);
652}
653
654void GBASyncProduceAudio(struct GBASync* sync, bool wait) {
655 if (!sync) {
656 return;
657 }
658
659 if (sync->audioWait && wait) {
660 // TODO loop properly in event of spurious wakeups
661 ConditionWait(&sync->audioRequiredCond, &sync->audioBufferMutex);
662 }
663 MutexUnlock(&sync->audioBufferMutex);
664}
665
666void GBASyncLockAudio(struct GBASync* sync) {
667 if (!sync) {
668 return;
669 }
670
671 MutexLock(&sync->audioBufferMutex);
672}
673
674void GBASyncUnlockAudio(struct GBASync* sync) {
675 if (!sync) {
676 return;
677 }
678
679 MutexUnlock(&sync->audioBufferMutex);
680}
681
682void GBASyncConsumeAudio(struct GBASync* sync) {
683 if (!sync) {
684 return;
685 }
686
687 ConditionWake(&sync->audioRequiredCond);
688 MutexUnlock(&sync->audioBufferMutex);
689}