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 int newCapacity = threadContext->rewindBufferCapacity;
385 int newInterval = threadContext->rewindBufferInterval;
386 threadContext->rewindBufferCapacity = 0;
387 threadContext->rewindBufferInterval = 0;
388 GBARewindSettingsChanged(threadContext, newCapacity, newInterval);
389
390 if (!threadContext->fpsTarget) {
391 threadContext->fpsTarget = _defaultFPSTarget;
392 }
393
394 if (threadContext->rom && !GBAIsROM(threadContext->rom)) {
395 threadContext->rom->close(threadContext->rom);
396 threadContext->rom = 0;
397 }
398
399 if (threadContext->gameDir) {
400 threadContext->gameDir->rewind(threadContext->gameDir);
401 struct VDirEntry* dirent = threadContext->gameDir->listNext(threadContext->gameDir);
402 while (dirent) {
403 struct Patch patchTemp;
404 struct VFile* vf = threadContext->gameDir->openFile(threadContext->gameDir, dirent->name(dirent), O_RDONLY);
405 if (!vf) {
406 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
407 continue;
408 }
409 if (!threadContext->rom && GBAIsROM(vf)) {
410 threadContext->rom = vf;
411 } else if (!threadContext->patch && loadPatch(vf, &patchTemp)) {
412 threadContext->patch = vf;
413 } else {
414 vf->close(vf);
415 }
416 dirent = threadContext->gameDir->listNext(threadContext->gameDir);
417 }
418
419 }
420
421 if (!threadContext->rom) {
422 threadContext->state = THREAD_SHUTDOWN;
423 return false;
424 }
425
426 threadContext->save = VDirOptionalOpenFile(threadContext->stateDir, threadContext->fname, "sram", ".sav", O_CREAT | O_RDWR);
427
428 MutexInit(&threadContext->stateMutex);
429 ConditionInit(&threadContext->stateCond);
430
431 MutexInit(&threadContext->sync.videoFrameMutex);
432 ConditionInit(&threadContext->sync.videoFrameAvailableCond);
433 ConditionInit(&threadContext->sync.videoFrameRequiredCond);
434 MutexInit(&threadContext->sync.audioBufferMutex);
435 ConditionInit(&threadContext->sync.audioRequiredCond);
436
437 threadContext->interruptDepth = 0;
438
439#ifndef _WIN32
440 sigset_t signals;
441 sigemptyset(&signals);
442 sigaddset(&signals, SIGINT);
443 sigaddset(&signals, SIGTRAP);
444 pthread_sigmask(SIG_BLOCK, &signals, 0);
445#endif
446
447 MutexLock(&threadContext->stateMutex);
448 ThreadCreate(&threadContext->thread, _GBAThreadRun, threadContext);
449 while (threadContext->state < THREAD_RUNNING) {
450 ConditionWait(&threadContext->stateCond, &threadContext->stateMutex);
451 }
452 MutexUnlock(&threadContext->stateMutex);
453
454 return true;
455}
456
457bool GBAThreadHasStarted(struct GBAThread* threadContext) {
458 bool hasStarted;
459 MutexLock(&threadContext->stateMutex);
460 hasStarted = threadContext->state > THREAD_INITIALIZED;
461 MutexUnlock(&threadContext->stateMutex);
462 return hasStarted;
463}
464
465bool GBAThreadHasExited(struct GBAThread* threadContext) {
466 bool hasExited;
467 MutexLock(&threadContext->stateMutex);
468 hasExited = threadContext->state > THREAD_EXITING;
469 MutexUnlock(&threadContext->stateMutex);
470 return hasExited;
471}
472
473bool GBAThreadHasCrashed(struct GBAThread* threadContext) {
474 bool hasExited;
475 MutexLock(&threadContext->stateMutex);
476 hasExited = threadContext->state == THREAD_CRASHED;
477 MutexUnlock(&threadContext->stateMutex);
478 return hasExited;
479}
480
481void GBAThreadEnd(struct GBAThread* threadContext) {
482 MutexLock(&threadContext->stateMutex);
483 _waitOnInterrupt(threadContext);
484 threadContext->state = THREAD_EXITING;
485 if (threadContext->gba) {
486 threadContext->gba->cpu->halted = false;
487 }
488 ConditionWake(&threadContext->stateCond);
489 MutexUnlock(&threadContext->stateMutex);
490 MutexLock(&threadContext->sync.audioBufferMutex);
491 threadContext->sync.audioWait = 0;
492 ConditionWake(&threadContext->sync.audioRequiredCond);
493 MutexUnlock(&threadContext->sync.audioBufferMutex);
494
495 MutexLock(&threadContext->sync.videoFrameMutex);
496 threadContext->sync.videoFrameWait = false;
497 threadContext->sync.videoFrameOn = false;
498 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
499 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
500 MutexUnlock(&threadContext->sync.videoFrameMutex);
501}
502
503void GBAThreadReset(struct GBAThread* threadContext) {
504 MutexLock(&threadContext->stateMutex);
505 _waitOnInterrupt(threadContext);
506 threadContext->state = THREAD_RESETING;
507 ConditionWake(&threadContext->stateCond);
508 MutexUnlock(&threadContext->stateMutex);
509}
510
511void GBAThreadJoin(struct GBAThread* threadContext) {
512 ThreadJoin(threadContext->thread);
513
514 MutexDeinit(&threadContext->stateMutex);
515 ConditionDeinit(&threadContext->stateCond);
516
517 MutexDeinit(&threadContext->sync.videoFrameMutex);
518 ConditionWake(&threadContext->sync.videoFrameAvailableCond);
519 ConditionDeinit(&threadContext->sync.videoFrameAvailableCond);
520 ConditionWake(&threadContext->sync.videoFrameRequiredCond);
521 ConditionDeinit(&threadContext->sync.videoFrameRequiredCond);
522
523 ConditionWake(&threadContext->sync.audioRequiredCond);
524 ConditionDeinit(&threadContext->sync.audioRequiredCond);
525 MutexDeinit(&threadContext->sync.audioBufferMutex);
526
527 int i;
528 for (i = 0; i < threadContext->rewindBufferCapacity; ++i) {
529 if (threadContext->rewindBuffer[i]) {
530 GBADeallocateState(threadContext->rewindBuffer[i]);
531 }
532 }
533 free(threadContext->rewindBuffer);
534
535 if (threadContext->rom) {
536 threadContext->rom->close(threadContext->rom);
537 threadContext->rom = 0;
538 }
539
540 if (threadContext->save) {
541 threadContext->save->close(threadContext->save);
542 threadContext->save = 0;
543 }
544
545 if (threadContext->bios) {
546 threadContext->bios->close(threadContext->bios);
547 threadContext->bios = 0;
548 }
549
550 if (threadContext->patch) {
551 threadContext->patch->close(threadContext->patch);
552 threadContext->patch = 0;
553 }
554
555 if (threadContext->gameDir) {
556 if (threadContext->stateDir == threadContext->gameDir) {
557 threadContext->stateDir = 0;
558 }
559 threadContext->gameDir->close(threadContext->gameDir);
560 threadContext->gameDir = 0;
561 }
562
563 if (threadContext->stateDir) {
564 threadContext->stateDir->close(threadContext->stateDir);
565 threadContext->stateDir = 0;
566 }
567}
568
569bool GBAThreadIsActive(struct GBAThread* threadContext) {
570 return threadContext->state >= THREAD_RUNNING && threadContext->state < THREAD_EXITING;
571}
572
573void GBAThreadInterrupt(struct GBAThread* threadContext) {
574 MutexLock(&threadContext->stateMutex);
575 ++threadContext->interruptDepth;
576 if (threadContext->interruptDepth > 1 || !GBAThreadIsActive(threadContext)) {
577 MutexUnlock(&threadContext->stateMutex);
578 return;
579 }
580 threadContext->savedState = threadContext->state;
581 _waitOnInterrupt(threadContext);
582 threadContext->state = THREAD_INTERRUPTING;
583 threadContext->gba->cpu->nextEvent = 0;
584 ConditionWake(&threadContext->stateCond);
585 _waitUntilNotState(threadContext, THREAD_INTERRUPTING);
586 MutexUnlock(&threadContext->stateMutex);
587}
588
589void GBAThreadContinue(struct GBAThread* threadContext) {
590 MutexLock(&threadContext->stateMutex);
591 --threadContext->interruptDepth;
592 if (threadContext->interruptDepth < 1 && GBAThreadIsActive(threadContext)) {
593 threadContext->state = threadContext->savedState;
594 ConditionWake(&threadContext->stateCond);
595 }
596 MutexUnlock(&threadContext->stateMutex);
597}
598
599void GBAThreadPause(struct GBAThread* threadContext) {
600 bool frameOn = true;
601 MutexLock(&threadContext->stateMutex);
602 _waitOnInterrupt(threadContext);
603 if (threadContext->state == THREAD_RUNNING) {
604 _pauseThread(threadContext, false);
605 frameOn = false;
606 }
607 MutexUnlock(&threadContext->stateMutex);
608
609 _changeVideoSync(&threadContext->sync, frameOn);
610}
611
612void GBAThreadUnpause(struct GBAThread* threadContext) {
613 MutexLock(&threadContext->stateMutex);
614 _waitOnInterrupt(threadContext);
615 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
616 threadContext->state = THREAD_RUNNING;
617 ConditionWake(&threadContext->stateCond);
618 }
619 MutexUnlock(&threadContext->stateMutex);
620
621 _changeVideoSync(&threadContext->sync, true);
622}
623
624bool GBAThreadIsPaused(struct GBAThread* threadContext) {
625 bool isPaused;
626 MutexLock(&threadContext->stateMutex);
627 _waitOnInterrupt(threadContext);
628 isPaused = threadContext->state == THREAD_PAUSED;
629 MutexUnlock(&threadContext->stateMutex);
630 return isPaused;
631}
632
633void GBAThreadTogglePause(struct GBAThread* threadContext) {
634 bool frameOn = true;
635 MutexLock(&threadContext->stateMutex);
636 _waitOnInterrupt(threadContext);
637 if (threadContext->state == THREAD_PAUSED || threadContext->state == THREAD_PAUSING) {
638 threadContext->state = THREAD_RUNNING;
639 ConditionWake(&threadContext->stateCond);
640 } else if (threadContext->state == THREAD_RUNNING) {
641 _pauseThread(threadContext, false);
642 frameOn = false;
643 }
644 MutexUnlock(&threadContext->stateMutex);
645
646 _changeVideoSync(&threadContext->sync, frameOn);
647}
648
649void GBAThreadPauseFromThread(struct GBAThread* threadContext) {
650 bool frameOn = true;
651 MutexLock(&threadContext->stateMutex);
652 _waitOnInterrupt(threadContext);
653 if (threadContext->state == THREAD_RUNNING) {
654 _pauseThread(threadContext, true);
655 frameOn = false;
656 }
657 MutexUnlock(&threadContext->stateMutex);
658
659 _changeVideoSync(&threadContext->sync, frameOn);
660}
661
662#ifdef USE_PTHREADS
663struct GBAThread* GBAThreadGetContext(void) {
664 pthread_once(&_contextOnce, _createTLS);
665 return pthread_getspecific(_contextKey);
666}
667#elif _WIN32
668struct GBAThread* GBAThreadGetContext(void) {
669 InitOnceExecuteOnce(&_contextOnce, _createTLS, NULL, 0);
670 return TlsGetValue(_contextKey);
671}
672#endif
673
674#ifdef USE_PNG
675void GBAThreadTakeScreenshot(struct GBAThread* threadContext) {
676 unsigned stride;
677 void* pixels = 0;
678 struct VFile* vf = VDirOptionalOpenIncrementFile(threadContext->stateDir, threadContext->gba->activeFile, "screenshot", "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
679 threadContext->gba->video.renderer->getPixels(threadContext->gba->video.renderer, &stride, &pixels);
680 png_structp png = PNGWriteOpen(vf);
681 png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
682 PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
683 PNGWriteClose(png, info);
684 vf->close(vf);
685}
686#endif
687
688#else
689struct GBAThread* GBAThreadGetContext(void) {
690 return 0;
691}
692#endif
693
694void GBASyncPostFrame(struct GBASync* sync) {
695 if (!sync) {
696 return;
697 }
698
699 MutexLock(&sync->videoFrameMutex);
700 ++sync->videoFramePending;
701 --sync->videoFrameSkip;
702 if (sync->videoFrameSkip < 0) {
703 do {
704 ConditionWake(&sync->videoFrameAvailableCond);
705 if (sync->videoFrameWait) {
706 ConditionWait(&sync->videoFrameRequiredCond, &sync->videoFrameMutex);
707 }
708 } while (sync->videoFrameWait && sync->videoFramePending);
709 }
710 MutexUnlock(&sync->videoFrameMutex);
711}
712
713bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip) {
714 if (!sync) {
715 return true;
716 }
717
718 MutexLock(&sync->videoFrameMutex);
719 ConditionWake(&sync->videoFrameRequiredCond);
720 if (!sync->videoFrameOn && !sync->videoFramePending) {
721 return false;
722 }
723 if (sync->videoFrameOn) {
724 if (ConditionWaitTimed(&sync->videoFrameAvailableCond, &sync->videoFrameMutex, 50)) {
725 return false;
726 }
727 }
728 sync->videoFramePending = 0;
729 sync->videoFrameSkip = frameskip;
730 return true;
731}
732
733void GBASyncWaitFrameEnd(struct GBASync* sync) {
734 if (!sync) {
735 return;
736 }
737
738 MutexUnlock(&sync->videoFrameMutex);
739}
740
741bool GBASyncDrawingFrame(struct GBASync* sync) {
742 if (!sync) {
743 return true;
744 }
745
746 return sync->videoFrameSkip <= 0;
747}
748
749void GBASyncSuspendDrawing(struct GBASync* sync) {
750 if (!sync) {
751 return;
752 }
753
754 _changeVideoSync(sync, false);
755}
756
757void GBASyncResumeDrawing(struct GBASync* sync) {
758 if (!sync) {
759 return;
760 }
761
762 _changeVideoSync(sync, true);
763}
764
765void GBASyncProduceAudio(struct GBASync* sync, bool wait) {
766 if (!sync) {
767 return;
768 }
769
770 if (sync->audioWait && wait) {
771 // TODO loop properly in event of spurious wakeups
772 ConditionWait(&sync->audioRequiredCond, &sync->audioBufferMutex);
773 }
774 MutexUnlock(&sync->audioBufferMutex);
775}
776
777void GBASyncLockAudio(struct GBASync* sync) {
778 if (!sync) {
779 return;
780 }
781
782 MutexLock(&sync->audioBufferMutex);
783}
784
785void GBASyncUnlockAudio(struct GBASync* sync) {
786 if (!sync) {
787 return;
788 }
789
790 MutexUnlock(&sync->audioBufferMutex);
791}
792
793void GBASyncConsumeAudio(struct GBASync* sync) {
794 if (!sync) {
795 return;
796 }
797
798 ConditionWake(&sync->audioRequiredCond);
799 MutexUnlock(&sync->audioBufferMutex);
800}