Quick and dirty multitasking (background suspend)

int _iPhoneRunTorqueMain( id appID, UIView *Window, UIApplication *app )
{
	platState.appID = appID;	
	platState.firstThreadId = ThreadManager::getCurrentThreadId();
	platState.Window = Window;
	platState.application = app;
	
	//Hidden by default.
	platState.application.statusBarHidden = YES;
	
#if !defined(TORQUE_MULTITHREAD)
	printf("performing mainInit()n");
	platState.lastTimeTick = Platform::getRealMilliseconds();
	if(!Game->mainInit(platState.argc, platState.argv))
	{
		return 0;
	}
	
	//Luma: CADisplayLink main loop support
	//Currently needs to move to app delegate or platstate.
	NSString *reqSysVer = @"3.1";
	NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
	if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
		CAdisplayLinkSupported = YES;

	//Need a true or it will think its crashed, and fail.
	return true;

#else
	
#endif
}

void _iPhoneGameResignActive(){
	Con::executef( 1, "oniPhoneResignActive" );
	
	// invalidate the timer so the game loop will stop
	if (CAdisplayLinkSupported)
	{
		[displayLink invalidate];
		displayLink = nil;
	}
	else
	{
		[platState.mainLoopTimer invalidate];
		platState.mainLoopTimer = nil;
	}
}

void _iPhoneGameBecomeActive(){
	Con::executef( 1, "oniPhoneBecomeActive" );
	
	// start the game loop running again
	if (CAdisplayLinkSupported)
	{
		//We can use the CADisplayLink to update the game now.
		//Luma: The magic number 1 below is because of what the docs say.
		
		/*
		 The default value is 1, which results in your application being notified at the refresh rate of the display.
		 If the value is set to a value larger than 1, the display link notifies your application at a fraction of the
		 native refresh rate. For example, setting the interval to 2 causes the display link to fire every other frame, 
		 providing half the frame rate.
         
		 Setting this value to less than 1 results in undefined behavior and is a programmer error.
		 */
        
		NSInteger updateDelay = 1;
		
		displayLink = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:platState.appID selector:@selector(runMainLoop)];
		[displayLink setFrameInterval:updateDelay];
		[displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
	}
	else
	{
		iPhoneRunEventLoopTimer(0);
	}
}