Cancel reconnect retries during shutdown

barnard.go

@@ -83,6 +83,9 @@ type Barnard struct {
 	adminBanList       gumble.BanList
 	adminUserList      gumble.RegisteredUsers
 	adminACL           *gumble.ACL
+
+	reconnectStop     chan struct{}
+	reconnectStopOnce sync.Once
 }
 
 // cleanupConnectionAudio releases connection-owned audio resources before a
@@ -174,6 +177,26 @@ func (b *Barnard) setConnected(connected bool) {
 	b.stateMutex.Unlock()
 }
 
+func (b *Barnard) stopReconnects() {
+	b.reconnectStopOnce.Do(func() {
+		if b.reconnectStop != nil {
+			close(b.reconnectStop)
+		}
+	})
+}
+
+func (b *Barnard) reconnectCanceled() bool {
+	if b.reconnectStop == nil {
+		return false
+	}
+	select {
+	case <-b.reconnectStop:
+		return true
+	default:
+		return false
+	}
+}
+
 func (b *Barnard) StopTransmission() {
 	if b.isTransmitting() {
 		b.Notify("micdown", "me", "")