Function AllocateCudaHostBuffer

cpp/src/arrow/gpu/cuda_memory.cc:464–468

// ----------------------------------------------------------------------

Result<std::shared_ptr<CudaHostBuffer>> AllocateCudaHostBuffer(int device_number,
                                                               const int64_t size) {
  ARROW_ASSIGN_OR_RAISE(auto manager, CudaDeviceManager::Instance());
  return manager->AllocateHost(device_number, size);
}

Result<uintptr_t> GetDeviceAddress(const uint8_t* cpu_data,
                                   const std::shared_ptr<CudaContext>& ctx) {