Method update

timer.go:70–79

Periodically check and update of time

()

// Periodically check and update  of time
func (timer *cachedTimer) update() {
	for {
		select {
		case <-timer.done:
			return
		case <-timer.ticker.C:
			atomic.StoreUint32(&timer.now, getUnixTime())
		}
	}
}