Method DisableSignalStopSource

r/src/safe-call-into-r.h:90–95

  }

  void DisableSignalStopSource() {
    if (SignalStopSourceEnabled()) {
      arrow::ResetSignalStopSource();
      stop_source_ = nullptr;
    }
  }

  arrow::io::IOContext CancellableIOContext() {
    return arrow::io::IOContext(gc_memory_pool(),