30     self->wr_callback = callback;  in init_weakref()
55     PyObject *callback = self->wr_callback;  in clear_weakref()
75         self->wr_callback = NULL;  in clear_weakref()
98     callback = self->wr_callback;  in _PyWeakref_ClearRef()
99     self->wr_callback = NULL;  in _PyWeakref_ClearRef()
101     self->wr_callback = callback;  in _PyWeakref_ClearRef()
116     Py_VISIT(self->wr_callback);  in gc_traverse()
229     if (head != NULL && head->wr_callback == NULL) {  in get_basic_refs()
238             && head->wr_callback == NULL  in get_basic_refs()
542     if (self->wr_callback != NULL)  in proxy_dealloc()
923     if (*list != NULL && (*list)->wr_callback == NULL) {  in PyObject_ClearWeakRefs()
925         if (*list != NULL && (*list)->wr_callback == NULL)  in PyObject_ClearWeakRefs()
935             PyObject *callback = current->wr_callback;  in PyObject_ClearWeakRefs()
937             current->wr_callback = NULL;  in PyObject_ClearWeakRefs()
962                     PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);  in PyObject_ClearWeakRefs()
965                     Py_DECREF(current->wr_callback);  in PyObject_ClearWeakRefs()
967                 current->wr_callback = NULL;  in PyObject_ClearWeakRefs()