status-go/vendor/github.com/libp2p/go-eventbus/opts.go

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package eventbus
type subSettings struct {
buffer int
}
var subSettingsDefault = subSettings{
buffer: 16,
}
func BufSize(n int) func(interface{}) error {
return func(s interface{}) error {
s.(*subSettings).buffer = n
return nil
}
}
type emitterSettings struct {
makeStateful bool
}
// Stateful is an Emitter option which makes makes the eventbus channel
// 'remember' last event sent, and when a new subscriber joins the
// bus, the remembered event is immediately sent to the subscription
// channel.
//
// This allows to provide state tracking for dynamic systems, and/or
// allows new subscribers to verify that there are Emitters on the channel
func Stateful(s interface{}) error {
s.(*emitterSettings).makeStateful = true
return nil
}