Core: Add shutdown callback

CHANGES

@@ -71,6 +71,8 @@ Other fixes:
  - VFS: Fix directory node listing on some filesystems
 Misc:
  - 3DS: Use "wide mode" where applicable for slightly better filtering
+ - Core: Add savedataUpdated callback
+ - Core: Add shutdown callback
  - GB: Allow pausing event loop while CPU is blocked
  - GBA: Allow pausing event loop while CPU is blocked
  - Debugger: Keep track of global cycle count

include/mgba/core/interface.h

@@ -107,6 +107,7 @@ struct mCoreCallbacks {
 	void (*videoFrameEnded)(void* context);
 	void (*coreCrashed)(void* context);
 	void (*sleep)(void* context);
+	void (*shutdown)(void* context);
 	void (*keysRead)(void* context);
 	void (*savedataUpdated)(void* context);
 };

src/core/thread.c

@@ -139,6 +139,14 @@ void _coreSleep(void* context) {
 	}
 }
 
+void _coreShutdown(void* context) {
+	struct mCoreThread* thread = context;
+	if (!thread) {
+		return;
+	}
+	_changeState(thread->impl, THREAD_EXITING, true);
+}
+
 static THREAD_ENTRY _mCoreThreadRun(void* context) {
 	struct mCoreThread* threadContext = context;
 #ifdef USE_PTHREADS
@@ -162,6 +170,7 @@ static THREAD_ENTRY _mCoreThreadRun(void* context) {
 		.videoFrameEnded = _frameEnded,
 		.coreCrashed = _crashed,
 		.sleep = _coreSleep,
+		.shutdown = _coreShutdown,
 		.context = threadContext
 	};
 	core->addCoreCallbacks(core, &callbacks);

src/gba/gba.c

@@ -525,11 +525,15 @@ void GBAHalt(struct GBA* gba) {
 }
 
 void GBAStop(struct GBA* gba) {
+	int validIrqs = (1 << IRQ_GAMEPAK) | (1 << IRQ_KEYPAD) | (1 << IRQ_SIO);
+	int sleep = gba->memory.io[REG_IE >> 1] & validIrqs;
 	size_t c;
 	for (c = 0; c < mCoreCallbacksListSize(&gba->coreCallbacks); ++c) {
 		struct mCoreCallbacks* callbacks = mCoreCallbacksListGetPointer(&gba->coreCallbacks, c);
-		if (callbacks->sleep) {
+		if (sleep && callbacks->sleep) {
 			callbacks->sleep(callbacks->context);
+		} else if (callbacks->shutdown) {
+			callbacks->shutdown(callbacks->context);
 		}
 	}
 	gba->cpu->nextEvent = gba->cpu->cycles;