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add gc support to slice (closes #26659)

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This commit is contained in:
Benjamin Peterson 2016-04-16 14:47:12 -07:00
parent a07ab29a79
commit 2b601d3905
3 changed files with 31 additions and 7 deletions
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19
Objects/sliceobject.c
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@ -119,7 +119,7 @@ PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
slice_cache = NULL;
_Py_NewReference((PyObject *)obj);
} else {
obj = PyObject_New(PySliceObject, &PySlice_Type);
obj = PyObject_GC_New(PySliceObject, &PySlice_Type);
if (obj == NULL)
return NULL;
}
@ -135,6 +135,7 @@ PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
obj->start = start;
obj->stop = stop;
_PyObject_GC_TRACK(obj);
return (PyObject *) obj;
}
@ -288,13 +289,14 @@ Create a slice object. This is used for extended slicing (e.g. a[0:10:2]).");
static void
slice_dealloc(PySliceObject *r)
{
_PyObject_GC_UNTRACK(r);
Py_DECREF(r->step);
Py_DECREF(r->start);
Py_DECREF(r->stop);
if (slice_cache == NULL)
slice_cache = r;
else
PyObject_Del(r);
PyObject_GC_Del(r);
}
static PyObject *
@ -586,6 +588,15 @@ slice_richcompare(PyObject *v, PyObject *w, int op)
return res;
}
static int
slice_traverse(PySliceObject *v, visitproc visit, void *arg)
{
Py_VISIT(v->start);
Py_VISIT(v->stop);
Py_VISIT(v->step);
return 0;
}
PyTypeObject PySlice_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"slice", /* Name of this type */
@ -606,9 +617,9 @@ PyTypeObject PySlice_Type = {
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
slice_doc, /* tp_doc */
0, /* tp_traverse */
(traverseproc)slice_traverse, /* tp_traverse */
0, /* tp_clear */
slice_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */