Factor out _PyStaticType_GET_WEAKREFS_LISTPTR().

Author: ericsnowcurrently

Include/internal/pycore_object.h

@@ -224,7 +224,7 @@ _PyObject_GET_WEAKREFS_LISTPTR(PyObject *op)
             ((PyTypeObject *)op)->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN) {
         static_builtin_state *state = _PyStaticType_GetState(
                                                         (PyTypeObject *)op);
-        return &state->tp_weaklist;
+        return _PyStaticType_GET_WEAKREFS_LISTPTR(state);
     }
     Py_ssize_t offset = Py_TYPE(op)->tp_weaklistoffset;
     return (PyObject **)((char *)op + offset);

Include/internal/pycore_typeobject.h

@@ -52,6 +52,13 @@ typedef struct {
     PyObject *tp_weaklist;
 } static_builtin_state;
 
+static inline PyObject **
+_PyStaticType_GET_WEAKREFS_LISTPTR(static_builtin_state *state)
+{
+    assert(state != NULL);
+    return &state->tp_weaklist;
+}
+
 struct types_state {
     struct type_cache type_cache;
     size_t num_builtins_initialized;