iPhone app system clock & sleep independent tick count

Is there any way to maintain a tick count in your iPhone app which is开发者_如何学Go :

1. independent of system clock
2. is not impacted by device sleep (unlike CACurrentMediaTime(), UpTime() etc.)

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Try this class, it will access the Mach kernel time on the device (kind like tick count since system boot) https://github.com/maddox/cocoaheads_gltouches/blob/master/Classes/MachTimer.m