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);
 23typedef void (*LogHandler)(struct GBAThread*, enum GBALogLevel, const char* format, va_list args);
 24
 25enum ThreadState {
 26	THREAD_INITIALIZED = -1,
 27	THREAD_RUNNING = 0,
 28	THREAD_INTERRUPTED,
 29	THREAD_INTERRUPTING,
 30	THREAD_PAUSED,
 31	THREAD_PAUSING,
 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 GBAAVStream {
 53	void (*postVideoFrame)(struct GBAAVStream*, struct GBAVideoRenderer* renderer);
 54	void (*postAudioFrame)(struct GBAAVStream*, int32_t left, int32_t right);
 55};
 56
 57struct GBAThread {
 58	// Output
 59	enum ThreadState state;
 60	struct GBA* gba;
 61	struct ARMCore* cpu;
 62
 63	// Input
 64	struct GBAVideoRenderer* renderer;
 65	struct GBASIODriverSet sioDrivers;
 66	struct ARMDebugger* debugger;
 67	struct VDir* gameDir;
 68	struct VDir* stateDir;
 69	struct VFile* rom;
 70	struct VFile* save;
 71	struct VFile* bios;
 72	struct VFile* patch;
 73	struct VFile* cheatsFile;
 74	const char* fname;
 75	int activeKeys;
 76	struct GBAAVStream* stream;
 77	struct Configuration* overrides;
 78	enum GBAIdleLoopOptimization idleOptimization;
 79
 80	bool hasOverride;
 81	struct GBACartridgeOverride override;
 82
 83	// Run-time options
 84	int frameskip;
 85	float fpsTarget;
 86	size_t audioBuffers;
 87	bool skipBios;
 88
 89	// Threading state
 90	Thread thread;
 91
 92	Mutex stateMutex;
 93	Condition stateCond;
 94	enum ThreadState savedState;
 95	int interruptDepth;
 96
 97	LogHandler logHandler;
 98	int logLevel;
 99	ThreadCallback startCallback;
100	ThreadCallback cleanCallback;
101	ThreadCallback frameCallback;
102	void* userData;
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
113	struct GBACheatSet* cheats;
114};
115
116void GBAMapOptionsToContext(const struct GBAOptions*, struct GBAThread*);
117void GBAMapArgumentsToContext(const struct GBAArguments*, struct GBAThread*);
118
119bool GBAThreadStart(struct GBAThread* threadContext);
120bool GBAThreadHasStarted(struct GBAThread* threadContext);
121bool GBAThreadHasExited(struct GBAThread* threadContext);
122bool GBAThreadHasCrashed(struct GBAThread* threadContext);
123void GBAThreadEnd(struct GBAThread* threadContext);
124void GBAThreadReset(struct GBAThread* threadContext);
125void GBAThreadJoin(struct GBAThread* threadContext);
126
127bool GBAThreadIsActive(struct GBAThread* threadContext);
128void GBAThreadInterrupt(struct GBAThread* threadContext);
129void GBAThreadContinue(struct GBAThread* threadContext);
130
131void GBAThreadPause(struct GBAThread* threadContext);
132void GBAThreadUnpause(struct GBAThread* threadContext);
133bool GBAThreadIsPaused(struct GBAThread* threadContext);
134void GBAThreadTogglePause(struct GBAThread* threadContext);
135void GBAThreadPauseFromThread(struct GBAThread* threadContext);
136struct GBAThread* GBAThreadGetContext(void);
137
138#ifdef USE_PNG
139void GBAThreadTakeScreenshot(struct GBAThread* threadContext);
140#endif
141
142void GBASyncPostFrame(struct GBASync* sync);
143bool GBASyncWaitFrameStart(struct GBASync* sync, int frameskip);
144void GBASyncWaitFrameEnd(struct GBASync* sync);
145bool GBASyncDrawingFrame(struct GBASync* sync);
146
147void GBASyncSuspendDrawing(struct GBASync* sync);
148void GBASyncResumeDrawing(struct GBASync* sync);
149
150void GBASyncProduceAudio(struct GBASync* sync, bool wait);
151void GBASyncLockAudio(struct GBASync* sync);
152void GBASyncUnlockAudio(struct GBASync* sync);
153void GBASyncConsumeAudio(struct GBASync* sync);
154
155#endif