s.lock.RLock()
		defer s.lock.RUnlock()
		if s.currentUnix == unixTime {
			s.currentCount.Add(1)
			return true
		}
		return false
	}(); done {
		return
	}

	// We trigger the change of <currentUnix>.
	s.lock.Lock()
	defer s.lock.Unlock()
	if s.currentUnix == unixTime {
		s.currentCount.Add(1)
		return
	}

	s.updateHistory(s.currentUnix, s.currentCount.Load())
	s.currentUnix = unixTime