bpo-36084: Add native thread ID (TID) to threading.Thread (GH-13463)

Add native thread ID (TID) to threading.Thread objects
(supported platforms: Windows, FreeBSD, Linux, macOS).
diff --git a/Include/pythread.h b/Include/pythread.h
index bc1d92c..40f12d2 100644
--- a/Include/pythread.h
+++ b/Include/pythread.h
@@ -26,6 +26,11 @@
 PyAPI_FUNC(void) _Py_NO_RETURN PyThread_exit_thread(void);
 PyAPI_FUNC(unsigned long) PyThread_get_thread_ident(void);
 
+#if defined(__APPLE__) || defined(__linux__) || defined(__FreeBSD__) || defined(_WIN32)
+#define PY_HAVE_THREAD_NATIVE_ID
+PyAPI_FUNC(unsigned long) PyThread_get_thread_native_id(void);
+#endif
+
 PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
 PyAPI_FUNC(void) PyThread_free_lock(PyThread_type_lock);
 PyAPI_FUNC(int) PyThread_acquire_lock(PyThread_type_lock, int);