signalWaitFuncs.go

type signalFunc func()
type waitFunc func()

// signalWaitFuncs returns a signalFunc and a waitFunc. Calling the returned
// waitFunc blocks until the signalFunc is called.
func signalWaitFuncs() (signalFunc, waitFunc) {
	port := make(chan bool)
	return func() { port <- true }, func() { <-port }
}