Method GetStopToken

r/src/safe-call-into-r.h:65–71

  bool IsMainThread() { return initialized_ && std::this_thread::get_id() == thread_id_; }

  arrow::StopToken GetStopToken() {
    if (SignalStopSourceEnabled()) {
      return stop_source_->token();
    } else {
      return arrow::StopToken::Unstoppable();
    }
  }

  bool SignalStopSourceEnabled() { return stop_source_ != nullptr; }