--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/configmix/_py_helper.h	Thu Jan 06 18:50:09 2022 +0100
@@ -0,0 +1,70 @@
+/* -*- coding: utf-8 -*- */
+/*
+ * Some Python helper for C.
+ *
+ * Also contains some interesting backports from later Python versions.
+ *
+ * :Copyright: (c) 2021, Franz Glasner. All rights reserved.
+ * :License:   BSD-3-Clause. See LICENSE.txt for details.
+ */
+
+#if !defined(_PY_HELPER_H_d9df407295df4884a88e56699f6c6d8d)
+#define _PY_HELPER_H_d9df407295df4884a88e56699f6c6d8d
+
+#if PY_VERSION_HEX < 0x030A0000
+
+static inline
+PyObject *
+Py_NewRef(PyObject *obj)
+{
+    Py_INCREF(obj);
+    return obj;
+}
+
+
+static inline
+PyObject *
+Py_XNewRef(PyObject *obj)
+{
+    Py_XINCREF(obj);
+    return obj;
+}
+
+#endif /* PY_VERSION_HEX < 0x030A0000 */
+
+
+static inline
+void
+py_clear_ref(PyObject **obj)
+{
+    PyObject *tmp;
+
+    if ((tmp = *obj) != NULL) {
+        *obj = NULL;
+        Py_DECREF(tmp);
+    }
+}
+
+
+/*
+ * NOTE: This implementation is valid for CPython only!
+ */
+static inline
+int
+py_object_is(PyObject *obj1, PyObject *obj2)
+{
+    return (obj1 == obj2);
+}
+
+
+/*
+ * NOTE: This implementation is valid for CPython only!
+ */
+static inline
+int
+py_object_isnot(PyObject *obj1, PyObject *obj2)
+{
+    return (obj1 != obj2);
+}
+
+#endif