Exit gracefully from games/applications

[tilkinsc]

I am working with some homebrew and it is typical for a callback handler which suspends a kernel thread to keep the program and perchance the while loop active. Is there a way in PPSSPP to resume such a thread so exiting can gracefully go to the PPSSPP XMB? (For example, HOME -> EXIT on physical PSP)

[hrydgard]

Does it not work to simply call sceKernelExitGame(), or does that hang or something?

[tilkinsc]

I guess I am more worried about 'crashing the game' to close it with the savestate menu thing. sceKernelExitGame() does indeed work, but I also wanted to make sure that my code is being executed, too. For example, saving data before closing.

#include <pspkernel.h>

static int exitRequest  = 1;

int isRunning()
{
	return exitRequest; // closes while loop
}

int exitCallback(int arg1, int arg2, void *common) // executes on sceKernelExitGame()
{
	exitRequest = 0;
	return 0;
}

int callbackThread(SceSize args, void *argp)
{
	int exit_callback;
	
	// register callback and sleep thread
	exit_callback = sceKernelCreateCallback("Exit Callback", exitCallback, NULL);
	sceKernelRegisterExitCallback(exit_callback);
	
	sceKernelSleepThreadCB();
	
	return 0;
}

void setupExitCallback()
{
	int exit_thread;
	
	exit_thread = sceKernelCreateThread("Callback Update Thread", callbackThread, 0x11, 0xFA0, THREAD_ATTR_USER, 0);
	
	if(exit_thread >= 0)
		sceKernelStartThread(exit_thread, 0, 0);
}

[unknownbrackets]

I don't think we actually call the exit callback, ever. When the user selects exit game we abort emulation currently. Maybe we should, although that would require a timeout or something in case the game doesn't actually quit, I suppose.

-[Unknown]

[hrydgard]

Since "real" games never call sceKernelExitGame, this has indeed not been prioritized. Marking as feature request.

[tilkinsc]

I guess I think I've seen exit options in a game menu somewhere (most likely not), but it was a feature of the XMB. I can see why you'd just stop the emulation dead like you do.