// See runtime/sema.go for documentation.
func runtime_notifyListAdd(l *notifyList) uint32

// See runtime/sema.go for documentation.
func runtime_notifyListWait(l *notifyList, t uint32)

// See runtime/sema.go for documentation.
func runtime_notifyListNotifyAll(l *notifyList)

// See runtime/sema.go for documentation.
func runtime_notifyListNotifyOne(l *notifyList)

// Ensure that sync and runtime agree on size of notifyList.

< SCHED
# Below SCHED is the scheduler implementation.
< allocmR,
  execR;
allocmR, execR, hchan < sched;
sched < allg, allp;

# Channels
NONE < notifyList;
hchan, notifyList < sudog;

hchan, pollDesc, wakeableSleep < timers;
timers, timerSend < timer < netpollInit;

# Semaphores
NONE < root;

# Itabs
NONE
< itab
< reflectOffs;

# User arena state

type Cond struct {
	noCopy noCopy

	// L is held while observing or changing the condition
	L Locker

	notify  notifyList
	checker copyChecker
}

// NewCond returns a new Cond with Locker l.
func NewCond(l Locker) *Cond {
	return &Cond{L: l}
}

// Wait atomically unlocks c.L and suspends execution