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Enable GC for new-style instances. This touches lots of files, since

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many types were subclassable but had a xxx_dealloc function that
called PyObject_DEL(self) directly instead of deferring to
self->ob_type->tp_free(self).  It is permissible to set tp_free in the
type object directly to _PyObject_Del, for non-GC types, or to
_PyObject_GC_Del, for GC types.  Still, PyObject_DEL was a tad faster,
so I'm fearing that our pystone rating is going down again.  I'm not
sure if doing something like

void xxx_dealloc(PyObject *self)
{
	if (PyXxxCheckExact(self))
		PyObject_DEL(self);
	else
		self->ob_type->tp_free(self);
}

is any faster than always calling the else branch, so I haven't
attempted that -- however those types whose own dealloc is fancier
(int, float, unicode) do use this pattern.
This commit is contained in:
Guido van Rossum 2001-10-05 20:51:39 +00:00
parent be63884d50
commit 9475a2310d
13 changed files with 90 additions and 26 deletions
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3
Objects/dictobject.c
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@ -705,7 +705,7 @@ dict_dealloc(register dictobject *mp)
}
if (mp->ma_table != mp->ma_smalltable)
PyMem_DEL(mp->ma_table);
PyObject_GC_Del(mp);
mp->ob_type->tp_free((PyObject *)mp);
Py_TRASHCAN_SAFE_END(mp)
}
@ -1769,6 +1769,7 @@ PyTypeObject PyDict_Type = {
(initproc)dict_init, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
dict_new, /* tp_new */
_PyObject_GC_Del, /* tp_free */
};
/* For backward compatibility with old dictionary interface */