diff --git a/pyg_lib/csrc/library.cpp b/pyg_lib/csrc/library.cpp
new file mode 100644
index 000000000..ecd136071
--- /dev/null
+++ b/pyg_lib/csrc/library.cpp
@@ -0,0 +1,34 @@
+#include "library.h"
+
+#ifdef USE_PYTHON
+#include <Python.h>
+#endif
+
+#ifdef WITH_CUDA
+#include <cuda.h>
+#endif
+
+#include <torch/library.h>
+
+// If we are in a Windows environment, we need to define
+// initialization functions for the _custom_ops extension.
+// For PyMODINIT_FUNC to work, we need to include Python.h
+#ifdef _WIN32
+#ifdef USE_PYTHON
+PyMODINIT_FUNC PyInit__C(void) { return NULL; }
+#endif // USE_PYTHON
+#endif // _WIN32
+
+namespace pyg {
+
+int64_t cuda_version() {
+#ifdef WITH_CUDA
+  return CUDA_VERSION;
+#else
+  return -1;
+#endif
+}
+
+TORCH_LIBRARY_FRAGMENT(pyg, m) { m.def("cuda_version", &cuda_version); }
+
+} // namespace pyg
diff --git a/pyg_lib/csrc/library.h b/pyg_lib/csrc/library.h
new file mode 100644
index 000000000..3012184e4
--- /dev/null
+++ b/pyg_lib/csrc/library.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include "macros.h"
+
+namespace pyg {
+
+PYG_API int64_t cuda_version();
+
+namespace detail {
+
+extern "C" PYG_INLINE_VARIABLE auto _register_ops = &cuda_version;
+#ifdef HINT_MSVC_LINKER_INCLUDE_SYMBOL
+#pragma comment(linker, "/include:_register_ops")
+#endif
+
+} // namespace detail
+} // namespace pyg
diff --git a/pyg_lib/csrc/macros.h b/pyg_lib/csrc/macros.h
new file mode 100644
index 000000000..63db86133
--- /dev/null
+++ b/pyg_lib/csrc/macros.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#ifdef _WIN32
+#if defined(pyg_EXPORTS)
+#define PYG_API __declspec(dllexport)
+#else
+#define PYG_API __declspec(dllimport)
+#endif
+#else
+#define PYG_API
+#endif
+
+#if (defined __cpp_inline_variables) || __cplusplus >= 201703L
+#define PYG_INLINE_VARIABLE inline
+#else
+#ifdef _MSC_VER
+#define PYG_INLINE_VARIABLE __declspec(selectany)
+#define HINT_MSVC_LINKER_INCLUDE_SYMBOL
+#else
+#define PYG_INLINE_VARIABLE __attribute__((weak))
+#endif
+#endif