Function CheckClosed

cpp/src/arrow/gpu/cuda_memory.h:189–194

  Result<int64_t> DoGetSize();

  Status CheckClosed() const {
    if (!is_open_) {
      return Status::Invalid("Operation forbidden on closed CudaBufferReader");
    }
    return Status::OK();
  }

  std::shared_ptr<CudaBuffer> buffer_;
  std::shared_ptr<CudaContext> context_;