return res;
}
#endif

TF_StringView TF_GetOpKernelName(TF_OpKernelContext* ctx) {
  auto cc_ctx = reinterpret_cast<::tensorflow::OpKernelContext*>(ctx);
  TF_StringView opkernel_name_sv;
  opkernel_name_sv.data = cc_ctx->op_kernel().name().data();
  opkernel_name_sv.len = cc_ctx->op_kernel().name().length();
  return opkernel_name_sv;
}

//   1. Cannot allocate a new temporary variable
//   2. Calling plugin allocator failed
TF_CAPI_EXPORT extern void TF_TemporaryVariable(
    TF_OpKernelContext* ctx, TF_DataType dtype, const int64_t* dims,
    int num_dims, TF_StringView* var_name,
    void (*plugin_allocator)(TF_OpKernelContext*, TF_Tensor*, TF_DataType,
                             const int64_t*, int, TF_Status*),
    TF_Status* tf_status);

// has the same lifetime as the OpKernel.
TF_CAPI_EXPORT extern TF_StringView TF_GetOpKernelName(TF_OpKernelContext* ctx);

// Returns the default container of the resource manager in OpKernelContext.
//
// The returned TF_StringView's underlying string is owned by the OpKernel and
// has the same lifetime as the OpKernel.
TF_CAPI_EXPORT extern TF_StringView TF_GetResourceMgrDefaultContainerName(
    TF_OpKernelContext* ctx);

// kernel computation.
struct HistogramSummaryOp {
  std::string op_node_name;
};

void* HistogramSummaryOp_Create(TF_OpKernelConstruction* ctx) {
  HistogramSummaryOp* kernel = new HistogramSummaryOp;
  TF_StringView string_view_name = TF_OpKernelConstruction_GetName(ctx);
  kernel->op_node_name =
      std::string(string_view_name.data, string_view_name.len);
  return kernel;
}

void HistogramSummaryOp_Delete(void* kernel) {

  }
  return var_name;
}

void TF_TemporaryVariable(TF_OpKernelContext* ctx, TF_DataType dtype,
                          const int64_t* dims, int num_dims,
                          TF_StringView* var_name,
                          void (*allocFunc)(TF_OpKernelContext*, TF_Tensor*,
                                            TF_DataType, const int64_t*, int,
                                            TF_Status*),

  TF_OpKernelConstruction_GetAttrType(ctx, "SomeDataTypeAttr", &type, status);
  EXPECT_EQ(TF_OK, TF_GetCode(status));
  EXPECT_EQ(TF_FLOAT, type);
  TF_DeleteStatus(status);

  // Exercise kernel NodeDef name read
  TF_StringView name_string_view = TF_OpKernelConstruction_GetName(ctx);
  std::string node_name = "SomeNodeName";
  std::string candidate_node_name =
      std::string(name_string_view.data, name_string_view.len);

// Used to return strings across the C API. The caller does not take ownership
// of the underlying data pointer and is not responsible for freeing it.
typedef struct TF_StringView {
  const char* data;
  size_t len;
} TF_StringView;

// --------------------------------------------------------------------------
// TF_SessionOptions holds options that can be passed during session creation.