Method ~SignalStopState

cpp/src/arrow/util/cancel.cc:176–190

  }

  ~SignalStopState() {
    atfork_handler_.reset();
    UnregisterHandlers();
    Disable();
    if (signal_receiving_thread_) {
      // Tell the receiving thread to stop
      auto st = self_pipe_->Shutdown();
      ARROW_WARN_NOT_OK(st, "Failed to shutdown self-pipe");
      if (st.ok()) {
        signal_receiving_thread_->join();
      } else {
        signal_receiving_thread_->detach();
      }
    }
  }

  StopSource* stop_source() {
    std::lock_guard<std::mutex> lock(mutex_);