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#ifndef GBA_THREAD_H
  7#define GBA_THREAD_H
  8
  9#include "util/common.h"
 10
 11#include "gba/gba.h"
 12#include "gba/input.h"
 13#include "gba/supervisor/overrides.h"
 14
 15#include "util/threading.h"
 16
 17struct GBAThread;
 18struct GBAArguments;
 19struct GBACheatSet;
 20struct GBAOptions;
 21
 22typedef void (*ThreadCallback)(struct GBAThread* threadContext);
 23
 24enum ThreadState {
 25	THREAD_INITIALIZED = -1,
 26	THREAD_RUNNING = 0,
 27	THREAD_INTERRUPTED,
 28	THREAD_INTERRUPTING,
 29	THREAD_PAUSED,
 30	THREAD_PAUSING,
 31	THREAD_RUN_ON,
 32	THREAD_RESETING,
 33	THREAD_EXITING,
 34	THREAD_SHUTDOWN,
 35	THREAD_CRASHED
 36};
 37
 38struct GBASync {
 39	int videoFramePending;
 40	bool videoFrameWait;
 41	int videoFrameSkip;
 42	bool videoFrameOn;
 43	Mutex videoFrameMutex;
 44	Condition videoFrameAvailableCond;
 45	Condition videoFrameRequiredCond;
 46
 47	bool audioWait;
 48	Condition audioRequiredCond;
 49	Mutex audioBufferMutex;
 50};
 51
 52struct GBAThread {
 53	// Output
 54	enum ThreadState state;
 55	struct GBA* gba;
 56	struct ARMCore* cpu;
 57
 58	// Input
 59	struct GBAVideoRenderer* renderer;
 60	struct GBASIODriverSet sioDrivers;
 61	struct ARMDebugger* debugger;
 62	struct VDir* gameDir;
 63	struct VDir* stateDir;
 64	struct VFile* rom;
 65	struct VFile* save;
 66	struct VFile* bios;
 67	struct VFile* patch;
 68	struct VFile* cheatsFile;
 69	const char* fname;
 70	const char* movie;
 71	int activeKeys;
 72	struct GBAAVStream* stream;
 73	struct Configuration* overrides;
 74	enum GBAIdleLoopOptimization idleOptimization;
 75
 76	bool hasOverride;
 77	struct GBACartridgeOverride override;
 78
 79	// Run-time options
 80	int frameskip;
 81	float fpsTarget;
 82	size_t audioBuffers;
 83	bool skipBios;
 84	int volume;
 85	bool mute;
 86
 87	// Threading state
 88	Thread thread;
 89
 90	Mutex stateMutex;
 91	Condition stateCond;
 92	enum ThreadState savedState;
 93	int interruptDepth;
 94	bool frameWasOn;
 95
 96	GBALogHandler logHandler;
 97	int logLevel;
 98	ThreadCallback startCallback;
 99	ThreadCallback cleanCallback;
100	ThreadCallback frameCallback;
101	void* userData;
102	void (*run)(struct GBAThread*);
103
104	struct GBASync sync;
105
106	int rewindBufferSize;
107	int rewindBufferCapacity;
108	int rewindBufferInterval;
109	int rewindBufferNext;
110	struct GBASerializedState** rewindBuffer;
111	int rewindBufferWriteOffset;
112	uint8_t* rewindScreenBuffer;
113
114	struct GBACheatDevice* cheats;
115};
116
117void GBAMapOptionsToContext(const struct GBAOptions*, struct GBAThread*);
118void GBAMapArgumentsToContext(const struct GBAArguments*, struct GBAThread*);
119
120bool GBAThreadStart(struct GBAThread* threadContext);
121bool GBAThreadHasStarted(struct GBAThread* threadContext);
122bool GBAThreadHasExited(struct GBAThread* threadContext);
123bool GBAThreadHasCrashed(struct GBAThread* threadContext);
124void GBAThreadEnd(struct GBAThread* threadContext);
125void GBAThreadReset(struct GBAThread* threadContext);
126void GBAThreadJoin(struct GBAThread* threadContext);
127
128bool GBAThreadIsActive(struct GBAThread* threadContext);
129void GBAThreadInterrupt(struct GBAThread* threadContext);
130void GBAThreadContinue(struct GBAThread* threadContext);
131
132void GBARunOnThread(struct GBAThread* threadContext, void (*run)(struct GBAThread*));
133
134void GBAThreadPause(struct GBAThread* threadContext);
135void GBAThreadUnpause(struct GBAThread* threadContext);
136bool GBAThreadIsPaused(struct GBAThread* threadContext);
137void GBAThreadTogglePause(struct GBAThread* threadContext);
138void GBAThreadPauseFromThread(struct GBAThread* threadContext);
139struct GBAThread* GBAThreadGetContext(void);
140
141#ifdef USE_PNG
142void GBAThreadTakeScreenshot(struct GBAThread* threadContext);
143#endif
144
145void GBASyncPostFrame(struct GBASync* sync);
146void GBASyncForceFrame(struct GBASync* sync);
147bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip);
148void GBASyncWaitFrameEnd(struct GBASync* sync);
149bool GBASyncDrawingFrame(struct GBASync* sync);
150void GBASyncSetVideoSync(struct GBASync* sync, bool wait);
151
152void GBASyncProduceAudio(struct GBASync* sync, bool wait);
153void GBASyncLockAudio(struct GBASync* sync);
154void GBASyncUnlockAudio(struct GBASync* sync);
155void GBASyncConsumeAudio(struct GBASync* sync);
156
157#endif