func()

in server.go [141:171]

• 28 lines of code
• 6 McCabe index (conditional complexity)

func (s *server) stop() {
	select {
	case <-s.done:
		return
	default:
		s.Once.Do(func() {
			close(s.done)
			s.lock.Lock()
			if s.server != nil {
				ctx, cancel := context.WithTimeout(context.Background(), serverFastFailTimeout)
				if err := s.server.Shutdown(ctx); err != nil {
					// if the log output is "shutdown ctx: context deadline exceeded"， it means that
					// there are still some active connections.
					log.Errorf("server shutdown ctx:%s error:%v", ctx, err)
				}
				cancel()
			}
			s.server = nil
			s.lock.Unlock()
			if s.streamListener != nil {
				// let the server exit asap when got error from RunEventLoop.
				s.streamListener.Close()
				s.streamListener = nil
			}
			if s.pktListener != nil {
				s.pktListener.Close()
				s.pktListener = nil
			}
		})
	}
}