torch-ext/torch_binding.cpp

// torch-ext/torch_binding.cpp
#include <torch/library.h>
#include "registration.h" // included in the build
#include "torch_binding.h" // Declares our img2gray_cuda function

TORCH_LIBRARY_EXPAND(TORCH_EXTENSION_NAME, ops) {
  ops.def("img2gray(Tensor input, Tensor! output) -> ()");
  ops.impl("img2gray", torch::kCUDA, &img2gray_cuda);
}

REGISTER_EXTENSION(TORCH_EXTENSION_NAME)