Method DoReadAt

cpp/src/arrow/gpu/cuda_memory.cc:262–273

}

Result<int64_t> CudaBufferReader::DoReadAt(int64_t position, int64_t nbytes,
                                           bool allow_short_read, void* buffer) {
  RETURN_NOT_OK(CheckClosed());

  auto real_nbytes = std::min(nbytes, size_ - position);
  if (!allow_short_read && real_nbytes != nbytes) {
    return Status::IOError("Cuda buffer too short: expected to be able to read ", nbytes,
                           " bytes, got ", real_nbytes);
  }
  RETURN_NOT_OK(context_->CopyDeviceToHost(buffer, address_ + position, real_nbytes));
  return real_nbytes;
}

Result<int64_t> CudaBufferReader::DoRead(int64_t nbytes, void* buffer) {
  RETURN_NOT_OK(CheckClosed());