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 gba.keySource = &threadContext->activeKeys;
237
238 if (threadContext->startCallback) {
239 threadContext->startCallback(threadContext);
240 }
241
242 _changeState(threadContext, THREAD_RUNNING, true);
243
244 while (threadContext->state < THREAD_EXITING) {
245 if (threadContext->debugger) {
246 struct ARMDebugger* debugger = threadContext->debugger;
247 ARMDebuggerRun(debugger);
248 if (debugger->state == DEBUGGER_SHUTDOWN) {
249 _changeState(threadContext, THREAD_EXITING, false);
250 }
251 } else {
252 while (threadContext->state == THREAD_RUNNING) {
253 ARMRunLoop(&cpu);
254 }
255 }
256
257 int resetScheduled = 0;
258 MutexLock(&threadContext->stateMutex);
259 while (threadContext->state > THREAD_RUNNING && threadContext->state < THREAD_EXITING) {
260 if (threadContext->state == THREAD_PAUSING) {
261 threadContext->state = THREAD_PAUSED;
262 ConditionWake(&threadContext->stateCond);
263 }
264 if (threadContext->state == THREAD_INTERRUPTING) {
265 threadContext->state = THREAD_INTERRUPTED;
266 ConditionWake(&threadContext->stateCond);
267 }
268 if (threadContext->state == THREAD_RESETING) {
269 threadContext->state = THREAD_RUNNING;
270 resetScheduled = 1;
271 }
272 while (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_INTERRUPTED) {
273 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
274 }
275 }
276 MutexUnlock(&threadContext->stateMutex);
277 if (resetScheduled) {
278 ARMReset(&cpu);
279 if (threadContext->skipBios) {
280 GBASkipBIOS(&cpu);
281 }
282 }
283 }
284
285 while (threadContext->state < THREAD_SHUTDOWN) {
286 _changeState(threadContext, THREAD_SHUTDOWN, false);
287 }
288
289 if (threadContext->cleanCallback) {
290 threadContext->cleanCallback(threadContext);
291 }
292
293 threadContext->gba = 0;
294 ARMDeinit(&cpu);
295 GBADestroy(&gba);
296 if (&cheatDevice == threadContext->cheats) {
297 GBACheatDeviceDestroy(&cheatDevice);
298 }
299
300 if (movie) {
301 movie->destroy(movie);
302 free(movie);
303 }
304
305 threadContext->sync.videoFrameOn = false;
306 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
307 ConditionWake(&threadContext->sync.audioRequiredCond);
308
309 return 0;
310}
311
312void GBAMapOptionsToContext(const struct GBAOptions* opts, struct GBAThread* threadContext) {
313 if (opts->useBios) {
314 threadContext->bios = VFileOpen(opts->bios, O_RDONLY);
315 } else {
316 threadContext->bios = 0;
317 }
318 threadContext->frameskip = opts->frameskip;
319 threadContext->logLevel = opts->logLevel;
320 if (opts->rewindEnable) {
321 threadContext->rewindBufferCapacity = opts->rewindBufferCapacity;
322 threadContext->rewindBufferInterval = opts->rewindBufferInterval;
323 } else {
324 threadContext->rewindBufferCapacity = 0;
325 }
326 threadContext->skipBios = opts->skipBios;
327 threadContext->sync.audioWait = opts->audioSync;
328 threadContext->sync.videoFrameWait = opts->videoSync;
329
330 if (opts->fpsTarget) {
331 threadContext->fpsTarget = opts->fpsTarget;
332 }
333
334 if (opts->audioBuffers) {
335 threadContext->audioBuffers = opts->audioBuffers;
336 }
337
338 threadContext->idleOptimization = opts->idleOptimization;
339}
340
341void GBAMapArgumentsToContext(const struct GBAArguments* args, struct GBAThread* threadContext) {
342 if (args->dirmode) {
343 threadContext->gameDir = VDirOpen(args->fname);
344 threadContext->stateDir = threadContext->gameDir;
345 } else {
346 threadContext->rom = VFileOpen(args->fname, O_RDONLY);
347 threadContext->gameDir = 0;
348#if USE_LIBZIP
349 if (!threadContext->gameDir) {
350 threadContext->gameDir = VDirOpenZip(args->fname, 0);
351 }
352#endif
353#if USE_LZMA
354 if (!threadContext->gameDir) {
355 threadContext->gameDir = VDirOpen7z(args->fname, 0);
356 }
357#endif
358 }
359 threadContext->fname = args->fname;
360 threadContext->patch = VFileOpen(args->patch, O_RDONLY);
361 threadContext->cheatsFile = VFileOpen(args->cheatsFile, O_RDONLY);
362 threadContext->movie = args->movie;
363}
364
365bool GBAThreadStart(struct GBAThread* threadContext) {
366 // TODO: error check
367 threadContext->activeKeys = 0;
368 threadContext->state = THREAD_INITIALIZED;
369 threadContext->sync.videoFrameOn = true;
370 threadContext->sync.videoFrameSkip = 0;
371
372 threadContext->rewindBuffer = 0;
373 int newCapacity = threadContext->rewindBufferCapacity;
374 int newInterval = threadContext->rewindBufferInterval;
375 threadContext->rewindBufferCapacity = 0;
376 threadContext->rewindBufferInterval = 0;
377 GBARewindSettingsChanged(threadContext, newCapacity, newInterval);
378
379 if (!threadContext->fpsTarget) {
380 threadContext->fpsTarget = _defaultFPSTarget;
381 }
382
383 if (threadContext->rom && !GBAIsROM(threadContext->rom)) {
384 threadContext->rom->close(threadContext->rom);
385 threadContext->rom = 0;
386 }
387
388 if (threadContext->gameDir) {
389 threadContext->gameDir->rewind(threadContext->gameDir);
390 struct VDirEntry* dirent = threadContext->gameDir->listNext(threadContext->gameDir);
391 while (dirent) {
392 struct Patch patchTemp;
393 struct VFile* vf = threadContext->gameDir->openFile(threadContext->gameDir, dirent->name(dirent), O_RDONLY);
394 if (!vf) {
395 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
396 continue;
397 }
398 if (!threadContext->rom && GBAIsROM(vf)) {
399 threadContext->rom = vf;
400 } else if (!threadContext->patch && loadPatch(vf, &patchTemp)) {
401 threadContext->patch = vf;
402 } else {
403 vf->close(vf);
404 }
405 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
406 }
407
408 }
409
410 if (!threadContext->rom) {
411 threadContext->state = THREAD_SHUTDOWN;
412 return false;
413 }
414
415 threadContext->save = VDirOptionalOpenFile(threadContext->stateDir, threadContext->fname, "sram", ".sav", O_CREAT | O_RDWR);
416
417 MutexInit(&threadContext->stateMutex);
418 ConditionInit(&threadContext->stateCond);
419
420 MutexInit(&threadContext->sync.videoFrameMutex);
421 ConditionInit(&threadContext->sync.videoFrameAvailableCond);
422 ConditionInit(&threadContext->sync.videoFrameRequiredCond);
423 MutexInit(&threadContext->sync.audioBufferMutex);
424 ConditionInit(&threadContext->sync.audioRequiredCond);
425
426 threadContext->interruptDepth = 0;
427
428#ifndef _WIN32
429 sigset_t signals;
430 sigemptyset(&signals);
431 sigaddset(&signals, SIGINT);
432 sigaddset(&signals, SIGTRAP);
433 pthread_sigmask(SIG_BLOCK, &signals, 0);
434#endif
435
436 MutexLock(&threadContext->stateMutex);
437 ThreadCreate(&threadContext->thread, _GBAThreadRun, threadContext);
438 while (threadContext->state < THREAD_RUNNING) {
439 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
440 }
441 MutexUnlock(&threadContext->stateMutex);
442
443 return true;
444}
445
446bool GBAThreadHasStarted(struct GBAThread* threadContext) {
447 bool hasStarted;
448 MutexLock(&threadContext->stateMutex);
449 hasStarted = threadContext->state > THREAD_INITIALIZED;
450 MutexUnlock(&threadContext->stateMutex);
451 return hasStarted;
452}
453
454bool GBAThreadHasExited(struct GBAThread* threadContext) {
455 bool hasExited;
456 MutexLock(&threadContext->stateMutex);
457 hasExited = threadContext->state > THREAD_EXITING;
458 MutexUnlock(&threadContext->stateMutex);
459 return hasExited;
460}
461
462bool GBAThreadHasCrashed(struct GBAThread* threadContext) {
463 bool hasExited;
464 MutexLock(&threadContext->stateMutex);
465 hasExited = threadContext->state == THREAD_CRASHED;
466 MutexUnlock(&threadContext->stateMutex);
467 return hasExited;
468}
469
470void GBAThreadEnd(struct GBAThread* threadContext) {
471 MutexLock(&threadContext->stateMutex);
472 _waitOnInterrupt(threadContext);
473 threadContext->state = THREAD_EXITING;
474 if (threadContext->gba) {
475 threadContext->gba->cpu->halted = false;
476 }
477 ConditionWake(&threadContext->stateCond);
478 MutexUnlock(&threadContext->stateMutex);
479 MutexLock(&threadContext->sync.audioBufferMutex);
480 threadContext->sync.audioWait = 0;
481 ConditionWake(&threadContext->sync.audioRequiredCond);
482 MutexUnlock(&threadContext->sync.audioBufferMutex);
483
484 MutexLock(&threadContext->sync.videoFrameMutex);
485 threadContext->sync.videoFrameWait = false;
486 threadContext->sync.videoFrameOn = false;
487 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
488 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
489 MutexUnlock(&threadContext->sync.videoFrameMutex);
490}
491
492void GBAThreadReset(struct GBAThread* threadContext) {
493 MutexLock(&threadContext->stateMutex);
494 _waitOnInterrupt(threadContext);
495 threadContext->state = THREAD_RESETING;
496 ConditionWake(&threadContext->stateCond);
497 MutexUnlock(&threadContext->stateMutex);
498}
499
500void GBAThreadJoin(struct GBAThread* threadContext) {
501 ThreadJoin(threadContext->thread);
502
503 MutexDeinit(&threadContext->stateMutex);
504 ConditionDeinit(&threadContext->stateCond);
505
506 MutexDeinit(&threadContext->sync.videoFrameMutex);
507 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
508 ConditionDeinit(&threadContext->sync.videoFrameAvailableCond);
509 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
510 ConditionDeinit(&threadContext->sync.videoFrameRequiredCond);
511
512 ConditionWake(&threadContext->sync.audioRequiredCond);
513 ConditionDeinit(&threadContext->sync.audioRequiredCond);
514 MutexDeinit(&threadContext->sync.audioBufferMutex);
515
516 int i;
517 for (i = 0; i < threadContext->rewindBufferCapacity; ++i) {
518 if (threadContext->rewindBuffer[i]) {
519 GBADeallocateState(threadContext->rewindBuffer[i]);
520 }
521 }
522 free(threadContext->rewindBuffer);
523
524 if (threadContext->rom) {
525 threadContext->rom->close(threadContext->rom);
526 threadContext->rom = 0;
527 }
528
529 if (threadContext->save) {
530 threadContext->save->close(threadContext->save);
531 threadContext->save = 0;
532 }
533
534 if (threadContext->bios) {
535 threadContext->bios->close(threadContext->bios);
536 threadContext->bios = 0;
537 }
538
539 if (threadContext->patch) {
540 threadContext->patch->close(threadContext->patch);
541 threadContext->patch = 0;
542 }
543
544 if (threadContext->gameDir) {
545 if (threadContext->stateDir == threadContext->gameDir) {
546 threadContext->stateDir = 0;
547 }
548 threadContext->gameDir->close(threadContext->gameDir);
549 threadContext->gameDir = 0;
550 }
551
552 if (threadContext->stateDir) {
553 threadContext->stateDir->close(threadContext->stateDir);
554 threadContext->stateDir = 0;
555 }
556}
557
558bool GBAThreadIsActive(struct GBAThread* threadContext) {
559 return threadContext->state >= THREAD_RUNNING && threadContext->state < THREAD_EXITING;
560}
561
562void GBAThreadInterrupt(struct GBAThread* threadContext) {
563 MutexLock(&threadContext->stateMutex);
564 ++threadContext->interruptDepth;
565 if (threadContext->interruptDepth > 1 || !GBAThreadIsActive(threadContext)) {
566 MutexUnlock(&threadContext->stateMutex);
567 return;
568 }
569 threadContext->savedState = threadContext->state;
570 _waitOnInterrupt(threadContext);
571 threadContext->state = THREAD_INTERRUPTING;
572 threadContext->gba->cpu->nextEvent = 0;
573 ConditionWake(&threadContext->stateCond);
574 _waitUntilNotState(threadContext, THREAD_INTERRUPTING);
575 MutexUnlock(&threadContext->stateMutex);
576}
577
578void GBAThreadContinue(struct GBAThread* threadContext) {
579 MutexLock(&threadContext->stateMutex);
580 --threadContext->interruptDepth;
581 if (threadContext->interruptDepth < 1 && GBAThreadIsActive(threadContext)) {
582 threadContext->state = threadContext->savedState;
583 ConditionWake(&threadContext->stateCond);
584 }
585 MutexUnlock(&threadContext->stateMutex);
586}
587
588void GBAThreadPause(struct GBAThread* threadContext) {
589 bool frameOn = true;
590 MutexLock(&threadContext->stateMutex);
591 _waitOnInterrupt(threadContext);
592 if (threadContext->state == THREAD_RUNNING) {
593 _pauseThread(threadContext, false);
594 frameOn = false;
595 }
596 MutexUnlock(&threadContext->stateMutex);
597
598 _changeVideoSync(&threadContext->sync, frameOn);
599}
600
601void GBAThreadUnpause(struct GBAThread* threadContext) {
602 MutexLock(&threadContext->stateMutex);
603 _waitOnInterrupt(threadContext);
604 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
605 threadContext->state = THREAD_RUNNING;
606 ConditionWake(&threadContext->stateCond);
607 }
608 MutexUnlock(&threadContext->stateMutex);
609
610 _changeVideoSync(&threadContext->sync, true);
611}
612
613bool GBAThreadIsPaused(struct GBAThread* threadContext) {
614 bool isPaused;
615 MutexLock(&threadContext->stateMutex);
616 _waitOnInterrupt(threadContext);
617 isPaused = threadContext->state == THREAD_PAUSED;
618 MutexUnlock(&threadContext->stateMutex);
619 return isPaused;
620}
621
622void GBAThreadTogglePause(struct GBAThread* threadContext) {
623 bool frameOn = true;
624 MutexLock(&threadContext->stateMutex);
625 _waitOnInterrupt(threadContext);
626 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
627 threadContext->state = THREAD_RUNNING;
628 ConditionWake(&threadContext->stateCond);
629 } else if (threadContext->state == THREAD_RUNNING) {
630 _pauseThread(threadContext, false);
631 frameOn = false;
632 }
633 MutexUnlock(&threadContext->stateMutex);
634
635 _changeVideoSync(&threadContext->sync, frameOn);
636}
637
638void GBAThreadPauseFromThread(struct GBAThread* threadContext) {
639 bool frameOn = true;
640 MutexLock(&threadContext->stateMutex);
641 _waitOnInterrupt(threadContext);
642 if (threadContext->state == THREAD_RUNNING) {
643 _pauseThread(threadContext, true);
644 frameOn = false;
645 }
646 MutexUnlock(&threadContext->stateMutex);
647
648 _changeVideoSync(&threadContext->sync, frameOn);
649}
650
651#ifdef USE_PTHREADS
652struct GBAThread* GBAThreadGetContext(void) {
653 pthread_once(&_contextOnce, _createTLS);
654 return pthread_getspecific(_contextKey);
655}
656#elif _WIN32
657struct GBAThread* GBAThreadGetContext(void) {
658 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
659 return TlsGetValue(_contextKey);
660}
661#endif
662
663#ifdef USE_PNG
664void GBAThreadTakeScreenshot(struct GBAThread* threadContext) {
665 unsigned stride;
666 void* pixels = 0;
667 struct VFile* vf = VDirOptionalOpenIncrementFile(threadContext->stateDir, threadContext->gba->activeFile, "screenshot", "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
668 threadContext->gba->video.renderer->getPixels(threadContext->gba->video.renderer, &stride, &pixels);
669 png_structp png = PNGWriteOpen(vf);
670 png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
671 PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
672 PNGWriteClose(png, info);
673 vf->close(vf);
674}
675#endif
676
677#else
678struct GBAThread* GBAThreadGetContext(void) {
679 return 0;
680}
681#endif
682
683void GBASyncPostFrame(struct GBASync* sync) {
684 if (!sync) {
685 return;
686 }
687
688 MutexLock(&sync->videoFrameMutex);
689 ++sync->videoFramePending;
690 --sync->videoFrameSkip;
691 if (sync->videoFrameSkip < 0) {
692 do {
693 ConditionWake(&sync->videoFrameAvailableCond);
694 if (sync->videoFrameWait) {
695 ConditionWait(&sync->videoFrameRequiredCond, &sync->videoFrameMutex);
696 }
697 } while (sync->videoFrameWait && sync->videoFramePending);
698 }
699 MutexUnlock(&sync->videoFrameMutex);
700}
701
702bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip) {
703 if (!sync) {
704 return true;
705 }
706
707 MutexLock(&sync->videoFrameMutex);
708 ConditionWake(&sync->videoFrameRequiredCond);
709 if (!sync->videoFrameOn && !sync->videoFramePending) {
710 return false;
711 }
712 if (sync->videoFrameOn) {
713 if (ConditionWaitTimed(&sync->videoFrameAvailableCond, &sync->videoFrameMutex, 50)) {
714 return false;
715 }
716 }
717 sync->videoFramePending = 0;
718 sync->videoFrameSkip = frameskip;
719 return true;
720}
721
722void GBASyncWaitFrameEnd(struct GBASync* sync) {
723 if (!sync) {
724 return;
725 }
726
727 MutexUnlock(&sync->videoFrameMutex);
728}
729
730bool GBASyncDrawingFrame(struct GBASync* sync) {
731 if (!sync) {
732 return true;
733 }
734
735 return sync->videoFrameSkip <= 0;
736}
737
738void GBASyncSuspendDrawing(struct GBASync* sync) {
739 if (!sync) {
740 return;
741 }
742
743 _changeVideoSync(sync, false);
744}
745
746void GBASyncResumeDrawing(struct GBASync* sync) {
747 if (!sync) {
748 return;
749 }
750
751 _changeVideoSync(sync, true);
752}
753
754void GBASyncProduceAudio(struct GBASync* sync, bool wait) {
755 if (!sync) {
756 return;
757 }
758
759 if (sync->audioWait && wait) {
760 // TODO loop properly in event of spurious wakeups
761 ConditionWait(&sync->audioRequiredCond, &sync->audioBufferMutex);
762 }
763 MutexUnlock(&sync->audioBufferMutex);
764}
765
766void GBASyncLockAudio(struct GBASync* sync) {
767 if (!sync) {
768 return;
769 }
770
771 MutexLock(&sync->audioBufferMutex);
772}
773
774void GBASyncUnlockAudio(struct GBASync* sync) {
775 if (!sync) {
776 return;
777 }
778
779 MutexUnlock(&sync->audioBufferMutex);
780}
781
782void GBASyncConsumeAudio(struct GBASync* sync) {
783 if (!sync) {
784 return;
785 }
786
787 ConditionWake(&sync->audioRequiredCond);
788 MutexUnlock(&sync->audioBufferMutex);
789}