/* Return true if object has a finalization method. */
static int
has_finalizer(PyObject *op)
{
/* first, dynamic decision per object */
traverseproc traverse;
int collectable;
traverse = Py_TYPE(op)->tp_traverse;
collectable = -1;
(void) traverse(op,
(visitproc)visit_has_finalizer,
(void *)&collectable);
if (collectable >= 0)
return collectable == 0;
if ( PyType_Check(op)) {
assert(delstr != NULL);
return _PyType_Lookup(Py_TYPE(op), delstr) != NULL;
}
else if (PyType_HasFeature(op->ob_type, Py_TPFLAGS_HEAPTYPE))
return op->ob_type->tp_del != NULL;
else if (PyGen_CheckExact(op))
return PyGen_NeedsFinalizing((PyGenObject *)op);
else
return op->ob_type->tp_del != NULL;
}
/* Return true if object has a finalization method. */
static int
has_finalizer(PyObject *op)
{
if (PyGen_CheckExact(op))
return PyGen_NeedsFinalizing((PyGenObject *)op);
else
return op->ob_type->tp_del != NULL;
}
/* Return true if object has a finalization method.
* CAUTION: An instance of an old-style class has to be checked for a
*__del__ method, and earlier versions of this used to call PyObject_HasAttr,
* which in turn could call the class's __getattr__ hook (if any). That
* could invoke arbitrary Python code, mutating the object graph in arbitrary
* ways, and that was the source of some excruciatingly subtle bugs.
*/
static int
has_finalizer(PyObject *op)
{
if (PyInstance_Check(op)) {
assert(delstr != NULL);
return _PyInstance_Lookup(op, delstr) != NULL;
}
else if (PyType_HasFeature(op->ob_type, Py_TPFLAGS_HEAPTYPE))
return op->ob_type->tp_del != NULL;
else if (PyGen_CheckExact(op))
return PyGen_NeedsFinalizing((PyGenObject *)op);
else
return 0;
}