func (igr *integrator) SetToCurrentTime() {
	igr.Set(float64(time.Now().UnixNano()))
}

func (igr *integrator) setLocked(x float64) {
	igr.updateLocked()
	igr.x = x
	if x < igr.min {
		igr.min = x
	}
	if x > igr.max {
		igr.max = x
	}
}

func (igr *integrator) updateLocked() {
	now := igr.clock.Now()
	dt := now.Sub(igr.lastTime).Seconds()
	igr.lastTime = now

		// our total assist time.
		return
	}
	if l.transitioning {
		throw("update during transition")
	}
	l.updateLocked(now)
	l.unlock()
}

// updateLocked is the implementation of update. l.lock must be held.
func (l *gcCPULimiterState) updateLocked(now int64) {
	lastUpdate := l.lastUpdate.Load()
	if now < lastUpdate {
		// Defensively avoid overflow. This isn't even the latest update anyway.