Behaviour of calling scheduleRepeating() on running DispatchSourceTimer?

Question

I have a running DispatchSourceTimer that is created with:

self.timer = DispatchSource.makeTimerSource(flags: .init(rawValue: 0), queue: self.myQueue)
self.timer!.scheduleRepeating(deadline: .now(), interval: .milliseconds(100))
self.timer!.setEventHandler(handler: self.myHandler)

What happens when I call:

self.timer!.scheduleRepeating(deadline: .now(), interval: .milliseconds(100))

at a later time? Does it reset the timer and make it start 'counting milliseconds' again?

The iOS documentation explains nothing.

Answer 1

Short answer:

Yes, it resets the timer and makes it start again

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You could test it yourself in a Playground ...