Fix PyModule_AddType()

Author: vstinner

pythoncapi_compat.h

@@ -439,7 +439,8 @@ PyModule_AddObjectRef(PyObject *module, const char *name, PyObject *value)
 
 
 // bpo-40024 added PyModule_AddType() to Python 3.9.0a5
-#if PY_VERSION_HEX < 0x030900A5
+// On Windows, PyModule_AddType() was added to limited C API 3.10.
+#if PY_VERSION_HEX < 0x030900A5 && !(defined(Py_LIMITED_API) && PY_VERSION_HEX < 0x030A0000)
 static inline int PyModule_AddType(PyObject *module, PyTypeObject *type)
 {
 #ifndef Py_LIMITED_API

tests/test_pythoncapi_compat_cext.c

@@ -430,6 +430,7 @@ check_module_attr(PyObject *module, const char *name, PyObject *expected)
 static int
 test_module_add_type(PyObject *module)
 {
+#if !(defined(Py_LIMITED_API) && PY_VERSION_HEX < 0x030A0000)
     PyTypeObject *type = &PyUnicode_Type;
     const char *type_name = "str";
 #ifdef CHECK_REFCNT
@@ -447,6 +448,7 @@ test_module_add_type(PyObject *module)
         return -1;
     }
     ASSERT_REFCNT(Py_REFCNT(_PyObject_CAST(type)) == refcnt);
+#endif  // !(defined(Py_LIMITED_API) && PY_VERSION_HEX < 0x030A0000)
     return 0;
 }