Method BackgroundReader

cpp/src/arrow/io/file_benchmark.cc:85–91

 protected:
  explicit BackgroundReader(int fd) : fd_(fd), total_bytes_(0) {
    file_handle_ = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
    ARROW_CHECK_NE(file_handle_, INVALID_HANDLE_VALUE);
    event_ =
        CreateEvent(nullptr, /* bManualReset=*/TRUE, /* bInitialState=*/FALSE, nullptr);
    ARROW_CHECK_NE(event_, INVALID_HANDLE_VALUE);
  }

  void LoopReading() {
    const HANDLE handles[] = {file_handle_, event_};