std::unique_ptr<const void*[]>* ptrs,
                          std::unique_ptr<size_t[]>* lens) {
  ptrs->reset(new const void*[v.size()]);
  lens->reset(new size_t[v.size()]);
  for (size_t i = 0; i < v.size(); ++i) {
    (*ptrs)[i] = v[i].data();
    (*lens)[i] = v[i].size();
  }
}

class CApiColocationTest : public ::testing::Test {
 protected:

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                                    const size_t* proto_lens, int num_shapes,
                                    TF_Status* status) {
  std::vector<TensorShapeProto> shapes;
  shapes.resize(num_shapes);
  for (int i = 0; i < num_shapes; ++i) {
    if (proto_lens[i] > std::numeric_limits<int>::max()) {
      status->status = InvalidArgument(
          "length of element ", i, " in the list (", proto_lens[i],

  EXPECT_EQ(list_total_size, storage_size);

  std::unique_ptr<char*[]> values(new char*[nodes_preserved.size()]);
  std::unique_ptr<size_t[]> lens(new size_t[nodes_preserved.size()]);
  std::unique_ptr<char[]> storage(new char[storage_size]);
  TF_GetNodesToPreserveList(c_item, values.get(), lens.get(),
                            nodes_preserved.size(), storage.get(), storage_size,
                            status);

// `protos` and `proto_lens` must point to arrays of length `num_shapes`.
// `protos[i]` must point to an array of `proto_lens[i]` bytes
// representing a binary-serialized TensorShapeProto.
TF_CAPI_EXPORT extern void TF_SetAttrTensorShapeProtoList(
    TF_OperationDescription* desc, const char* attr_name,
    const void* const* protos, const size_t* proto_lens, int num_shapes,
    TF_Status* status);