sg.releasetime = cputicks()
	}
	goready(gp, skip+1)
}

// timerchandrain removes all elements in channel c's buffer.
// It reports whether any elements were removed.
// Because it is only intended for timers, it does not
// handle waiting senders at all (all timer channels
// use non-blocking sends to fill the buffer).
func timerchandrain(c *hchan) bool {
	// Note: Cannot use empty(c) because we are called

	t.when = 0

	if !async && t.isChan {
		// Stop any future sends with stale values.
		// See timer.unlockAndRun.
		t.seq++
	}
	t.unlock()
	if !async && t.isChan {
		unlock(&t.sendLock)
		if timerchandrain(t.hchan()) {
			pending = true
		}
	}

	return pending
}

// deleteMin removes timer 0 from ts.
// ts must be locked.
func (ts *timers) deleteMin() {
	assertLockHeld(&ts.mu)