Martin v. Löwis added the comment: Antoine: Py_DECREF calls tp_dealloc directly, so the type needs to be DECREFed in the course of tp_dealloc. I don't think there is any alternative to that.
One may wonder why regular extension types don't do that: this is because of a hack that excludes static (non-heap) types from being reference counted in their instances. Heap types do refcount their types, consequently, subtype_dealloc also DECREFs the type. I certainly agree that this is muddy, in particular when it comes to subtyping where the derived subtype calls the base tp_dealloc. In an ideal world, object_dealloc would decref the type, and subtypes would be required to call the base type's dealloc. However, I feel that this cannot be changed before Python 4. So I'd propose that it is actually the leaf subtype which decrefs ob_type. The check whether you are the leaf type is then done by checking whether tp_dealloc is the one you are "in" right now. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15653> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
