src/gba/supervisor/thread.c (view raw)
1/* Copyright (c) 2013-2015 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 "thread.h"
7
8#include "arm.h"
9#include "gba/gba.h"
10#include "gba/cheats.h"
11#include "gba/serialize.h"
12#include "gba/supervisor/config.h"
13#include "gba/rr/mgm.h"
14#include "gba/rr/vbm.h"
15
16#include "debugger/debugger.h"
17
18#include "util/patch.h"
19#include "util/png-io.h"
20#include "util/vfs.h"
21
22#include "platform/commandline.h"
23
24#include <signal.h>
25
26static const float _defaultFPSTarget = 60.f;
27
28#ifdef USE_PTHREADS
29static pthread_key_t _contextKey;
30static pthread_once_t _contextOnce = PTHREAD_ONCE_INIT;
31
32static void _createTLS(void) {
33 pthread_key_create(&_contextKey, 0);
34}
35#elif _WIN32
36static DWORD _contextKey;
37static INIT_ONCE _contextOnce = INIT_ONCE_STATIC_INIT;
38
39static BOOL CALLBACK _createTLS(PINIT_ONCE once, PVOID param, PVOID* context) {
40 UNUSED(once);
41 UNUSED(param);
42 UNUSED(context);
43 _contextKey = TlsAlloc();
44 return TRUE;
45}
46#endif
47
48#ifndef DISABLE_THREADING
49static void _changeState(struct GBAThread* threadContext, enum ThreadState newState, bool broadcast) {
50 MutexLock(&threadContext->stateMutex);
51 threadContext->state = newState;
52 if (broadcast) {
53 ConditionWake(&threadContext->stateCond);
54 }
55 MutexUnlock(&threadContext->stateMutex);
56}
57
58static void _waitOnInterrupt(struct GBAThread* threadContext) {
59 while (threadContext->state == THREAD_INTERRUPTED) {
60 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
61 }
62}
63
64static void _waitUntilNotState(struct GBAThread* threadContext, enum ThreadState oldState) {
65 MutexLock(&threadContext->sync.videoFrameMutex);
66 bool videoFrameWait = threadContext->sync.videoFrameWait;
67 threadContext->sync.videoFrameWait = false;
68 MutexUnlock(&threadContext->sync.videoFrameMutex);
69
70 while (threadContext->state == oldState) {
71 MutexUnlock(&threadContext->stateMutex);
72
73 MutexLock(&threadContext->sync.videoFrameMutex);
74 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
75 MutexUnlock(&threadContext->sync.videoFrameMutex);
76
77 MutexLock(&threadContext->sync.audioBufferMutex);
78 ConditionWake(&threadContext->sync.audioRequiredCond);
79 MutexUnlock(&threadContext->sync.audioBufferMutex);
80
81 MutexLock(&threadContext->stateMutex);
82 ConditionWake(&threadContext->stateCond);
83 }
84
85 MutexLock(&threadContext->sync.videoFrameMutex);
86 threadContext->sync.videoFrameWait = videoFrameWait;
87 MutexUnlock(&threadContext->sync.videoFrameMutex);
88}
89
90static void _pauseThread(struct GBAThread* threadContext, bool onThread) {
91 threadContext->state = THREAD_PAUSING;
92 if (!onThread) {
93 _waitUntilNotState(threadContext, THREAD_PAUSING);
94 }
95}
96#endif
97
98static void _changeVideoSync(struct GBASync* sync, bool frameOn) {
99 // Make sure the video thread can process events while the GBA thread is paused
100 MutexLock(&sync->videoFrameMutex);
101 if (frameOn != sync->videoFrameOn) {
102 sync->videoFrameOn = frameOn;
103 ConditionWake(&sync->videoFrameAvailableCond);
104 }
105 MutexUnlock(&sync->videoFrameMutex);
106}
107
108#ifndef DISABLE_THREADING
109static THREAD_ENTRY _GBAThreadRun(void* context) {
110#ifdef USE_PTHREADS
111 pthread_once(&_contextOnce, _createTLS);
112#else
113 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
114#endif
115
116 struct GBA gba;
117 struct ARMCore cpu;
118 struct Patch patch;
119 struct GBACheatDevice cheatDevice;
120 struct GBAThread* threadContext = context;
121 struct ARMComponent* components[GBA_COMPONENT_MAX] = {};
122 struct GBARRContext* movie = 0;
123 int numComponents = GBA_COMPONENT_MAX;
124
125#if !defined(_WIN32) && defined(USE_PTHREADS)
126 sigset_t signals;
127 sigemptyset(&signals);
128 pthread_sigmask(SIG_SETMASK, &signals, 0);
129#endif
130
131 GBACreate(&gba);
132 ARMSetComponents(&cpu, &gba.d, numComponents, components);
133 ARMInit(&cpu);
134 gba.sync = &threadContext->sync;
135 threadContext->gba = &gba;
136 gba.logLevel = threadContext->logLevel;
137 gba.logHandler = threadContext->logHandler;
138 gba.stream = threadContext->stream;
139 gba.idleOptimization = threadContext->idleOptimization;
140#ifdef USE_PTHREADS
141 pthread_setspecific(_contextKey, threadContext);
142#else
143 TlsSetValue(_contextKey, threadContext);
144#endif
145
146 if (threadContext->audioBuffers) {
147 GBAAudioResizeBuffer(&gba.audio, threadContext->audioBuffers);
148 } else {
149 threadContext->audioBuffers = GBA_AUDIO_SAMPLES;
150 }
151
152 if (threadContext->renderer) {
153 GBAVideoAssociateRenderer(&gba.video, threadContext->renderer);
154 }
155
156 if (threadContext->rom) {
157 GBALoadROM(&gba, threadContext->rom, threadContext->save, threadContext->fname);
158
159 struct GBACartridgeOverride override;
160 const struct GBACartridge* cart = (const struct GBACartridge*) gba.memory.rom;
161 memcpy(override.id, &cart->id, sizeof(override.id));
162 if (GBAOverrideFind(threadContext->overrides, &override)) {
163 GBAOverrideApply(&gba, &override);
164 }
165 if (threadContext->hasOverride) {
166 GBAOverrideApply(&gba, &threadContext->override);
167 }
168
169 if (threadContext->bios && GBAIsBIOS(threadContext->bios)) {
170 GBALoadBIOS(&gba, threadContext->bios);
171 }
172
173 if (threadContext->patch && loadPatch(threadContext->patch, &patch)) {
174 GBAApplyPatch(&gba, &patch);
175 }
176 }
177
178 if (threadContext->movie) {
179 struct VDir* movieDir = VDirOpen(threadContext->movie);
180#ifdef USE_LIBZIP
181 if (!movieDir) {
182 movieDir = VDirOpenZip(threadContext->movie, 0);
183 }
184#endif
185 if (movieDir) {
186 struct GBAMGMContext* mgm = malloc(sizeof(*mgm));
187 GBAMGMContextCreate(mgm);
188 if (!GBAMGMSetStream(mgm, movieDir)) {
189 mgm->d.destroy(&mgm->d);
190 } else {
191 movie = &mgm->d;
192 }
193 } else {
194 struct VFile* movieFile = VFileOpen(threadContext->movie, O_RDONLY);
195 if (movieFile) {
196 struct GBAVBMContext* vbm = malloc(sizeof(*vbm));
197 GBAVBMContextCreate(vbm);
198 if (!GBAVBMSetStream(vbm, movieFile)) {
199 vbm->d.destroy(&vbm->d);
200 } else {
201 movie = &vbm->d;
202 }
203 }
204 }
205 }
206
207 ARMReset(&cpu);
208
209 if (movie) {
210 gba.rr = movie;
211 movie->startPlaying(movie, false);
212 GBARRInitPlay(&gba);
213 }
214
215 if (threadContext->skipBios) {
216 GBASkipBIOS(&cpu);
217 }
218
219 if (!threadContext->cheats) {
220 GBACheatDeviceCreate(&cheatDevice);
221 threadContext->cheats = &cheatDevice;
222 }
223 if (threadContext->cheatsFile) {
224 GBACheatParseFile(threadContext->cheats, threadContext->cheatsFile);
225 }
226 GBACheatAttachDevice(&gba, threadContext->cheats);
227
228 if (threadContext->debugger) {
229 threadContext->debugger->log = GBADebuggerLogShim;
230 GBAAttachDebugger(&gba, threadContext->debugger);
231 ARMDebuggerEnter(threadContext->debugger, DEBUGGER_ENTER_ATTACHED, 0);
232 }
233
234 GBASIOSetDriverSet(&gba.sio, &threadContext->sioDrivers);
235
236 if (threadContext->volume == 0) {
237 threadContext->volume = GBA_AUDIO_VOLUME_MAX;
238 }
239 if (threadContext->mute) {
240 gba.audio.volume = 0;
241 } else {
242 gba.audio.volume = threadContext->volume;
243 }
244
245 gba.keySource = &threadContext->activeKeys;
246
247 if (threadContext->startCallback) {
248 threadContext->startCallback(threadContext);
249 }
250
251 _changeState(threadContext, THREAD_RUNNING, true);
252
253 while (threadContext->state < THREAD_EXITING) {
254 if (threadContext->debugger) {
255 struct ARMDebugger* debugger = threadContext->debugger;
256 ARMDebuggerRun(debugger);
257 if (debugger->state == DEBUGGER_SHUTDOWN) {
258 _changeState(threadContext, THREAD_EXITING, false);
259 }
260 } else {
261 while (threadContext->state == THREAD_RUNNING) {
262 ARMRunLoop(&cpu);
263 }
264 }
265
266 int resetScheduled = 0;
267 MutexLock(&threadContext->stateMutex);
268 while (threadContext->state > THREAD_RUNNING && threadContext->state < THREAD_EXITING) {
269 if (threadContext->state == THREAD_PAUSING) {
270 threadContext->state = THREAD_PAUSED;
271 ConditionWake(&threadContext->stateCond);
272 }
273 if (threadContext->state == THREAD_INTERRUPTING) {
274 threadContext->state = THREAD_INTERRUPTED;
275 ConditionWake(&threadContext->stateCond);
276 }
277 if (threadContext->state == THREAD_RESETING) {
278 threadContext->state = THREAD_RUNNING;
279 resetScheduled = 1;
280 }
281 while (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_INTERRUPTED) {
282 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
283 }
284 }
285 MutexUnlock(&threadContext->stateMutex);
286 if (resetScheduled) {
287 ARMReset(&cpu);
288 if (threadContext->skipBios) {
289 GBASkipBIOS(&cpu);
290 }
291 }
292 }
293
294 while (threadContext->state < THREAD_SHUTDOWN) {
295 _changeState(threadContext, THREAD_SHUTDOWN, false);
296 }
297
298 if (threadContext->cleanCallback) {
299 threadContext->cleanCallback(threadContext);
300 }
301
302 threadContext->gba = 0;
303 ARMDeinit(&cpu);
304 GBADestroy(&gba);
305 if (&cheatDevice == threadContext->cheats) {
306 GBACheatDeviceDestroy(&cheatDevice);
307 }
308
309 if (movie) {
310 movie->destroy(movie);
311 free(movie);
312 }
313
314 threadContext->sync.videoFrameOn = false;
315 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
316 ConditionWake(&threadContext->sync.audioRequiredCond);
317
318 return 0;
319}
320
321void GBAMapOptionsToContext(const struct GBAOptions* opts, struct GBAThread* threadContext) {
322 if (opts->useBios) {
323 threadContext->bios = VFileOpen(opts->bios, O_RDONLY);
324 } else {
325 threadContext->bios = 0;
326 }
327 threadContext->frameskip = opts->frameskip;
328 threadContext->volume = opts->volume;
329 threadContext->mute = opts->mute;
330 threadContext->logLevel = opts->logLevel;
331 if (opts->rewindEnable) {
332 threadContext->rewindBufferCapacity = opts->rewindBufferCapacity;
333 threadContext->rewindBufferInterval = opts->rewindBufferInterval;
334 } else {
335 threadContext->rewindBufferCapacity = 0;
336 }
337 threadContext->skipBios = opts->skipBios;
338 threadContext->sync.audioWait = opts->audioSync;
339 threadContext->sync.videoFrameWait = opts->videoSync;
340
341 if (opts->fpsTarget) {
342 threadContext->fpsTarget = opts->fpsTarget;
343 }
344
345 if (opts->audioBuffers) {
346 threadContext->audioBuffers = opts->audioBuffers;
347 }
348
349 threadContext->idleOptimization = opts->idleOptimization;
350}
351
352void GBAMapArgumentsToContext(const struct GBAArguments* args, struct GBAThread* threadContext) {
353 if (args->dirmode) {
354 threadContext->gameDir = VDirOpen(args->fname);
355 threadContext->stateDir = threadContext->gameDir;
356 } else {
357 threadContext->rom = VFileOpen(args->fname, O_RDONLY);
358 threadContext->gameDir = 0;
359#if USE_LIBZIP
360 if (!threadContext->gameDir) {
361 threadContext->gameDir = VDirOpenZip(args->fname, 0);
362 }
363#endif
364#if USE_LZMA
365 if (!threadContext->gameDir) {
366 threadContext->gameDir = VDirOpen7z(args->fname, 0);
367 }
368#endif
369 }
370 threadContext->fname = args->fname;
371 threadContext->patch = VFileOpen(args->patch, O_RDONLY);
372 threadContext->cheatsFile = VFileOpen(args->cheatsFile, O_RDONLY);
373 threadContext->movie = args->movie;
374}
375
376bool GBAThreadStart(struct GBAThread* threadContext) {
377 // TODO: error check
378 threadContext->activeKeys = 0;
379 threadContext->state = THREAD_INITIALIZED;
380 threadContext->sync.videoFrameOn = true;
381 threadContext->sync.videoFrameSkip = 0;
382
383 threadContext->rewindBuffer = 0;
384 threadContext->rewindScreenBuffer = 0;
385 int newCapacity = threadContext->rewindBufferCapacity;
386 int newInterval = threadContext->rewindBufferInterval;
387 threadContext->rewindBufferCapacity = 0;
388 threadContext->rewindBufferInterval = 0;
389 GBARewindSettingsChanged(threadContext, newCapacity, newInterval);
390
391 if (!threadContext->fpsTarget) {
392 threadContext->fpsTarget = _defaultFPSTarget;
393 }
394
395 if (threadContext->rom && !GBAIsROM(threadContext->rom)) {
396 threadContext->rom->close(threadContext->rom);
397 threadContext->rom = 0;
398 }
399
400 if (threadContext->gameDir) {
401 threadContext->gameDir->rewind(threadContext->gameDir);
402 struct VDirEntry* dirent = threadContext->gameDir->listNext(threadContext->gameDir);
403 while (dirent) {
404 struct Patch patchTemp;
405 struct VFile* vf = threadContext->gameDir->openFile(threadContext->gameDir, dirent->name(dirent), O_RDONLY);
406 if (!vf) {
407 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
408 continue;
409 }
410 if (!threadContext->rom && GBAIsROM(vf)) {
411 threadContext->rom = vf;
412 } else if (!threadContext->patch && loadPatch(vf, &patchTemp)) {
413 threadContext->patch = vf;
414 } else {
415 vf->close(vf);
416 }
417 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
418 }
419
420 }
421
422 if (!threadContext->rom) {
423 threadContext->state = THREAD_SHUTDOWN;
424 return false;
425 }
426
427 threadContext->save = VDirOptionalOpenFile(threadContext->stateDir, threadContext->fname, "sram", ".sav", O_CREAT | O_RDWR);
428
429 MutexInit(&threadContext->stateMutex);
430 ConditionInit(&threadContext->stateCond);
431
432 MutexInit(&threadContext->sync.videoFrameMutex);
433 ConditionInit(&threadContext->sync.videoFrameAvailableCond);
434 ConditionInit(&threadContext->sync.videoFrameRequiredCond);
435 MutexInit(&threadContext->sync.audioBufferMutex);
436 ConditionInit(&threadContext->sync.audioRequiredCond);
437
438 threadContext->interruptDepth = 0;
439
440#ifndef _WIN32
441 sigset_t signals;
442 sigemptyset(&signals);
443 sigaddset(&signals, SIGINT);
444 sigaddset(&signals, SIGTRAP);
445 pthread_sigmask(SIG_BLOCK, &signals, 0);
446#endif
447
448 MutexLock(&threadContext->stateMutex);
449 ThreadCreate(&threadContext->thread, _GBAThreadRun, threadContext);
450 while (threadContext->state < THREAD_RUNNING) {
451 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
452 }
453 MutexUnlock(&threadContext->stateMutex);
454
455 return true;
456}
457
458bool GBAThreadHasStarted(struct GBAThread* threadContext) {
459 bool hasStarted;
460 MutexLock(&threadContext->stateMutex);
461 hasStarted = threadContext->state > THREAD_INITIALIZED;
462 MutexUnlock(&threadContext->stateMutex);
463 return hasStarted;
464}
465
466bool GBAThreadHasExited(struct GBAThread* threadContext) {
467 bool hasExited;
468 MutexLock(&threadContext->stateMutex);
469 hasExited = threadContext->state > THREAD_EXITING;
470 MutexUnlock(&threadContext->stateMutex);
471 return hasExited;
472}
473
474bool GBAThreadHasCrashed(struct GBAThread* threadContext) {
475 bool hasExited;
476 MutexLock(&threadContext->stateMutex);
477 hasExited = threadContext->state == THREAD_CRASHED;
478 MutexUnlock(&threadContext->stateMutex);
479 return hasExited;
480}
481
482void GBAThreadEnd(struct GBAThread* threadContext) {
483 MutexLock(&threadContext->stateMutex);
484 _waitOnInterrupt(threadContext);
485 threadContext->state = THREAD_EXITING;
486 if (threadContext->gba) {
487 threadContext->gba->cpu->halted = false;
488 }
489 ConditionWake(&threadContext->stateCond);
490 MutexUnlock(&threadContext->stateMutex);
491 MutexLock(&threadContext->sync.audioBufferMutex);
492 threadContext->sync.audioWait = 0;
493 ConditionWake(&threadContext->sync.audioRequiredCond);
494 MutexUnlock(&threadContext->sync.audioBufferMutex);
495
496 MutexLock(&threadContext->sync.videoFrameMutex);
497 threadContext->sync.videoFrameWait = false;
498 threadContext->sync.videoFrameOn = false;
499 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
500 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
501 MutexUnlock(&threadContext->sync.videoFrameMutex);
502}
503
504void GBAThreadReset(struct GBAThread* threadContext) {
505 MutexLock(&threadContext->stateMutex);
506 _waitOnInterrupt(threadContext);
507 threadContext->state = THREAD_RESETING;
508 ConditionWake(&threadContext->stateCond);
509 MutexUnlock(&threadContext->stateMutex);
510}
511
512void GBAThreadJoin(struct GBAThread* threadContext) {
513 ThreadJoin(threadContext->thread);
514
515 MutexDeinit(&threadContext->stateMutex);
516 ConditionDeinit(&threadContext->stateCond);
517
518 MutexDeinit(&threadContext->sync.videoFrameMutex);
519 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
520 ConditionDeinit(&threadContext->sync.videoFrameAvailableCond);
521 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
522 ConditionDeinit(&threadContext->sync.videoFrameRequiredCond);
523
524 ConditionWake(&threadContext->sync.audioRequiredCond);
525 ConditionDeinit(&threadContext->sync.audioRequiredCond);
526 MutexDeinit(&threadContext->sync.audioBufferMutex);
527
528 int i;
529 for (i = 0; i < threadContext->rewindBufferCapacity; ++i) {
530 if (threadContext->rewindBuffer[i]) {
531 GBADeallocateState(threadContext->rewindBuffer[i]);
532 }
533 }
534 free(threadContext->rewindBuffer);
535 free(threadContext->rewindScreenBuffer);
536
537 if (threadContext->rom) {
538 threadContext->rom->close(threadContext->rom);
539 threadContext->rom = 0;
540 }
541
542 if (threadContext->save) {
543 threadContext->save->close(threadContext->save);
544 threadContext->save = 0;
545 }
546
547 if (threadContext->bios) {
548 threadContext->bios->close(threadContext->bios);
549 threadContext->bios = 0;
550 }
551
552 if (threadContext->patch) {
553 threadContext->patch->close(threadContext->patch);
554 threadContext->patch = 0;
555 }
556
557 if (threadContext->gameDir) {
558 if (threadContext->stateDir == threadContext->gameDir) {
559 threadContext->stateDir = 0;
560 }
561 threadContext->gameDir->close(threadContext->gameDir);
562 threadContext->gameDir = 0;
563 }
564
565 if (threadContext->stateDir) {
566 threadContext->stateDir->close(threadContext->stateDir);
567 threadContext->stateDir = 0;
568 }
569}
570
571bool GBAThreadIsActive(struct GBAThread* threadContext) {
572 return threadContext->state >= THREAD_RUNNING && threadContext->state < THREAD_EXITING;
573}
574
575void GBAThreadInterrupt(struct GBAThread* threadContext) {
576 MutexLock(&threadContext->stateMutex);
577 ++threadContext->interruptDepth;
578 if (threadContext->interruptDepth > 1 || !GBAThreadIsActive(threadContext)) {
579 MutexUnlock(&threadContext->stateMutex);
580 return;
581 }
582 threadContext->savedState = threadContext->state;
583 _waitOnInterrupt(threadContext);
584 threadContext->state = THREAD_INTERRUPTING;
585 threadContext->gba->cpu->nextEvent = 0;
586 ConditionWake(&threadContext->stateCond);
587 _waitUntilNotState(threadContext, THREAD_INTERRUPTING);
588 MutexUnlock(&threadContext->stateMutex);
589}
590
591void GBAThreadContinue(struct GBAThread* threadContext) {
592 MutexLock(&threadContext->stateMutex);
593 --threadContext->interruptDepth;
594 if (threadContext->interruptDepth < 1 && GBAThreadIsActive(threadContext)) {
595 threadContext->state = threadContext->savedState;
596 ConditionWake(&threadContext->stateCond);
597 }
598 MutexUnlock(&threadContext->stateMutex);
599}
600
601void GBAThreadPause(struct GBAThread* threadContext) {
602 bool frameOn = true;
603 MutexLock(&threadContext->stateMutex);
604 _waitOnInterrupt(threadContext);
605 if (threadContext->state == THREAD_RUNNING) {
606 _pauseThread(threadContext, false);
607 frameOn = false;
608 }
609 MutexUnlock(&threadContext->stateMutex);
610
611 _changeVideoSync(&threadContext->sync, frameOn);
612}
613
614void GBAThreadUnpause(struct GBAThread* threadContext) {
615 MutexLock(&threadContext->stateMutex);
616 _waitOnInterrupt(threadContext);
617 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
618 threadContext->state = THREAD_RUNNING;
619 ConditionWake(&threadContext->stateCond);
620 }
621 MutexUnlock(&threadContext->stateMutex);
622
623 _changeVideoSync(&threadContext->sync, true);
624}
625
626bool GBAThreadIsPaused(struct GBAThread* threadContext) {
627 bool isPaused;
628 MutexLock(&threadContext->stateMutex);
629 _waitOnInterrupt(threadContext);
630 isPaused = threadContext->state == THREAD_PAUSED;
631 MutexUnlock(&threadContext->stateMutex);
632 return isPaused;
633}
634
635void GBAThreadTogglePause(struct GBAThread* threadContext) {
636 bool frameOn = true;
637 MutexLock(&threadContext->stateMutex);
638 _waitOnInterrupt(threadContext);
639 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
640 threadContext->state = THREAD_RUNNING;
641 ConditionWake(&threadContext->stateCond);
642 } else if (threadContext->state == THREAD_RUNNING) {
643 _pauseThread(threadContext, false);
644 frameOn = false;
645 }
646 MutexUnlock(&threadContext->stateMutex);
647
648 _changeVideoSync(&threadContext->sync, frameOn);
649}
650
651void GBAThreadPauseFromThread(struct GBAThread* threadContext) {
652 bool frameOn = true;
653 MutexLock(&threadContext->stateMutex);
654 _waitOnInterrupt(threadContext);
655 if (threadContext->state == THREAD_RUNNING) {
656 _pauseThread(threadContext, true);
657 frameOn = false;
658 }
659 MutexUnlock(&threadContext->stateMutex);
660
661 _changeVideoSync(&threadContext->sync, frameOn);
662}
663
664#ifdef USE_PTHREADS
665struct GBAThread* GBAThreadGetContext(void) {
666 pthread_once(&_contextOnce, _createTLS);
667 return pthread_getspecific(_contextKey);
668}
669#elif _WIN32
670struct GBAThread* GBAThreadGetContext(void) {
671 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
672 return TlsGetValue(_contextKey);
673}
674#endif
675
676#ifdef USE_PNG
677void GBAThreadTakeScreenshot(struct GBAThread* threadContext) {
678 unsigned stride;
679 void* pixels = 0;
680 struct VFile* vf = VDirOptionalOpenIncrementFile(threadContext->stateDir, threadContext->gba->activeFile, "screenshot", "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
681 threadContext->gba->video.renderer->getPixels(threadContext->gba->video.renderer, &stride, &pixels);
682 png_structp png = PNGWriteOpen(vf);
683 png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
684 PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
685 PNGWriteClose(png, info);
686 vf->close(vf);
687}
688#endif
689
690#else
691struct GBAThread* GBAThreadGetContext(void) {
692 return 0;
693}
694#endif
695
696void GBASyncPostFrame(struct GBASync* sync) {
697 if (!sync) {
698 return;
699 }
700
701 MutexLock(&sync->videoFrameMutex);
702 ++sync->videoFramePending;
703 --sync->videoFrameSkip;
704 if (sync->videoFrameSkip < 0) {
705 do {
706 ConditionWake(&sync->videoFrameAvailableCond);
707 if (sync->videoFrameWait) {
708 ConditionWait(&sync->videoFrameRequiredCond, &sync->videoFrameMutex);
709 }
710 } while (sync->videoFrameWait && sync->videoFramePending);
711 }
712 MutexUnlock(&sync->videoFrameMutex);
713}
714
715void GBASyncForceFrame(struct GBASync* sync) {
716 if (!sync) {
717 return;
718 }
719
720 MutexLock(&sync->videoFrameMutex);
721 ConditionWake(&sync->videoFrameAvailableCond);
722 MutexUnlock(&sync->videoFrameMutex);
723}
724
725bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip) {
726 if (!sync) {
727 return true;
728 }
729
730 MutexLock(&sync->videoFrameMutex);
731 ConditionWake(&sync->videoFrameRequiredCond);
732 if (!sync->videoFrameOn && !sync->videoFramePending) {
733 return false;
734 }
735 if (sync->videoFrameOn) {
736 if (ConditionWaitTimed(&sync->videoFrameAvailableCond, &sync->videoFrameMutex, 50)) {
737 return false;
738 }
739 }
740 sync->videoFramePending = 0;
741 sync->videoFrameSkip = frameskip;
742 return true;
743}
744
745void GBASyncWaitFrameEnd(struct GBASync* sync) {
746 if (!sync) {
747 return;
748 }
749
750 MutexUnlock(&sync->videoFrameMutex);
751}
752
753bool GBASyncDrawingFrame(struct GBASync* sync) {
754 if (!sync) {
755 return true;
756 }
757
758 return sync->videoFrameSkip <= 0;
759}
760
761void GBASyncSuspendDrawing(struct GBASync* sync) {
762 if (!sync) {
763 return;
764 }
765
766 _changeVideoSync(sync, false);
767}
768
769void GBASyncResumeDrawing(struct GBASync* sync) {
770 if (!sync) {
771 return;
772 }
773
774 _changeVideoSync(sync, true);
775}
776
777void GBASyncProduceAudio(struct GBASync* sync, bool wait) {
778 if (!sync) {
779 return;
780 }
781
782 if (sync->audioWait && wait) {
783 // TODO loop properly in event of spurious wakeups
784 ConditionWait(&sync->audioRequiredCond, &sync->audioBufferMutex);
785 }
786 MutexUnlock(&sync->audioBufferMutex);
787}
788
789void GBASyncLockAudio(struct GBASync* sync) {
790 if (!sync) {
791 return;
792 }
793
794 MutexLock(&sync->audioBufferMutex);
795}
796
797void GBASyncUnlockAudio(struct GBASync* sync) {
798 if (!sync) {
799 return;
800 }
801
802 MutexUnlock(&sync->audioBufferMutex);
803}
804
805void GBASyncConsumeAudio(struct GBASync* sync) {
806 if (!sync) {
807 return;
808 }
809
810 ConditionWake(&sync->audioRequiredCond);
811 MutexUnlock(&sync->audioBufferMutex);
812}