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#ifndef GBA_THREAD_H
  7#define GBA_THREAD_H
  8
  9#include "util/common.h"
 10
 11#include "gba.h"
 12#include "gba-input.h"
 13#include "gba-overrides.h"
 14
 15#include "util/threading.h"
 16
 17struct GBAThread;
 18struct GBAArguments;
 19struct GBAOptions;
 20typedef void (*ThreadCallback)(struct GBAThread* threadContext);
 21typedef void (*LogHandler)(struct GBAThread*, enum GBALogLevel, const char* format, va_list args);
 22
 23enum ThreadState {
 24	THREAD_INITIALIZED = -1,
 25	THREAD_RUNNING = 0,
 26	THREAD_INTERRUPTED,
 27	THREAD_INTERRUPTING,
 28	THREAD_PAUSED,
 29	THREAD_PAUSING,
 30	THREAD_RESETING,
 31	THREAD_EXITING,
 32	THREAD_SHUTDOWN,
 33	THREAD_CRASHED
 34};
 35
 36struct GBASync {
 37	int videoFramePending;
 38	bool videoFrameWait;
 39	int videoFrameSkip;
 40	bool videoFrameOn;
 41	Mutex videoFrameMutex;
 42	Condition videoFrameAvailableCond;
 43	Condition videoFrameRequiredCond;
 44
 45	bool audioWait;
 46	Condition audioRequiredCond;
 47	Mutex audioBufferMutex;
 48};
 49
 50struct GBAAVStream {
 51	void (*postVideoFrame)(struct GBAAVStream*, struct GBAVideoRenderer* renderer);
 52	void (*postAudioFrame)(struct GBAAVStream*, int32_t left, int32_t right);
 53};
 54
 55struct GBAThread {
 56	// Output
 57	enum ThreadState state;
 58	struct GBA* gba;
 59	struct ARMCore* cpu;
 60
 61	// Input
 62	struct GBAVideoRenderer* renderer;
 63	struct GBASIODriverSet sioDrivers;
 64	struct ARMDebugger* debugger;
 65	struct VDir* gameDir;
 66	struct VDir* stateDir;
 67	struct VFile* rom;
 68	struct VFile* save;
 69	struct VFile* bios;
 70	struct VFile* patch;
 71	const char* fname;
 72	int activeKeys;
 73	struct GBAAVStream* stream;
 74	struct Configuration* overrides;
 75
 76	bool hasOverride;
 77	struct GBACartridgeOverride override;
 78
 79	// Run-time options
 80	int frameskip;
 81	float fpsTarget;
 82	size_t audioBuffers;
 83
 84	// Threading state
 85	Thread thread;
 86
 87	Mutex stateMutex;
 88	Condition stateCond;
 89	enum ThreadState savedState;
 90	int interruptDepth;
 91
 92	LogHandler logHandler;
 93	int logLevel;
 94	ThreadCallback startCallback;
 95	ThreadCallback cleanCallback;
 96	ThreadCallback frameCallback;
 97	void* userData;
 98
 99	struct GBASync sync;
100
101	int rewindBufferSize;
102	int rewindBufferCapacity;
103	int rewindBufferInterval;
104	int rewindBufferNext;
105	struct GBASerializedState** rewindBuffer;
106	int rewindBufferWriteOffset;
107
108	bool skipBios;
109};
110
111void GBAMapOptionsToContext(const struct GBAOptions*, struct GBAThread*);
112void GBAMapArgumentsToContext(const struct GBAArguments*, struct GBAThread*);
113
114bool GBAThreadStart(struct GBAThread* threadContext);
115bool GBAThreadHasStarted(struct GBAThread* threadContext);
116bool GBAThreadHasExited(struct GBAThread* threadContext);
117bool GBAThreadHasCrashed(struct GBAThread* threadContext);
118void GBAThreadEnd(struct GBAThread* threadContext);
119void GBAThreadReset(struct GBAThread* threadContext);
120void GBAThreadJoin(struct GBAThread* threadContext);
121
122bool GBAThreadIsActive(struct GBAThread* threadContext);
123void GBAThreadInterrupt(struct GBAThread* threadContext);
124void GBAThreadContinue(struct GBAThread* threadContext);
125
126void GBAThreadPause(struct GBAThread* threadContext);
127void GBAThreadUnpause(struct GBAThread* threadContext);
128bool GBAThreadIsPaused(struct GBAThread* threadContext);
129void GBAThreadTogglePause(struct GBAThread* threadContext);
130void GBAThreadPauseFromThread(struct GBAThread* threadContext);
131struct GBAThread* GBAThreadGetContext(void);
132
133#ifdef USE_PNG
134void GBAThreadTakeScreenshot(struct GBAThread* threadContext);
135#endif
136
137void GBASyncPostFrame(struct GBASync* sync);
138bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip);
139void GBASyncWaitFrameEnd(struct GBASync* sync);
140bool GBASyncDrawingFrame(struct GBASync* sync);
141
142void GBASyncSuspendDrawing(struct GBASync* sync);
143void GBASyncResumeDrawing(struct GBASync* sync);
144
145void GBASyncProduceAudio(struct GBASync* sync, bool wait);
146void GBASyncLockAudio(struct GBASync* sync);
147void GBASyncUnlockAudio(struct GBASync* sync);
148void GBASyncConsumeAudio(struct GBASync* sync);
149
150#endif