Method handle

cpp/src/arrow/gpu/cuda_context.cc:236–236

int64_t CudaDevice::total_memory() const { return impl_->props.total_memory_; }

int CudaDevice::handle() const { return impl_->props.handle_; }

Result<std::shared_ptr<CudaDevice>> CudaDevice::Make(int device_number) {
  ARROW_ASSIGN_OR_RAISE(auto manager, CudaDeviceManager::Instance());