Function delTimerLocked

timers.go:51–71

Delete timer t from the heap. It returns true if t was removed, false if t wasn't even there. Do not need to update the timer routine: if it wakes up early, no big deal.

(t *Timer)

// It returns true if t was removed, false if t wasn't even there.
// Do not need to update the timer routine: if it wakes up early, no big deal.
func delTimerLocked(t *Timer) bool {
	// t may not be registered anymore and may have
	// a bogus i (typically 0, if generated by Go).
	// Verify it before proceeding.
	i := t.i
	last := len(timers) - 1
	if i < 0 || i > last || timers[i] != t {
		return false
	}
	if i != last {
		timers[i] = timers[last]
		timers[i].i = i
	}
	timers[last] = nil
	timers = timers[:last]
	if i != last {
		siftupTimer(i)
		siftdownTimer(i)
	}
	return true
}

// Reset the timer to the new timeout duration.
// This clears the channel.