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v2fly/common/signal/notifier.go
Darien Raymond 20fc4950b2
comments
2018-02-11 23:28:42 +01:00

27 lines
640 B
Go

package signal
// Notifier is an utility for notifying changes. The change producer may notify changes multiple time, and the consumer may get notified asychronously.
type Notifier struct {
c chan struct{}
}
// NewNotifier creates a new Notifier.
func NewNotifier() *Notifier {
return &Notifier{
c: make(chan struct{}, 1),
}
}
// Signal signals a change, usually by producer. This method never blocks.
func (n *Notifier) Signal() {
select {
case n.c <- struct{}{}:
default:
}
}
// Wait returns a channel for waiting for changes. The returned channel never gets closed.
func (n *Notifier) Wait() <-chan struct{} {
return n.c
}