Method HandleSignal

cpp/src/arrow/flight/server.cc:109–114

  std::atomic<int> got_signal_;

  static void HandleSignal(int signum) {
    auto instance = running_instance_.load();
    if (instance != nullptr) {
      instance->DoHandleSignal(signum);
    }
  }

  void DoHandleSignal(int signum) {
    got_signal_ = signum;