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Add GC support to count() objects.

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This commit is contained in:
Raymond Hettinger 2009-02-16 20:50:56 +00:00
parent d67c60ff81
commit d6280f4b78
2 changed files with 19 additions and 4 deletions
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5
Lib/test/test_itertools.py
View File

@ -979,6 +979,11 @@ class TestGC(unittest.TestCase):
a = []
self.makecycle(compress('ABCDEF', [1,0,1,0,1,0]), a)
def test_count(self):
a = []
Int = type('Int', (int,), dict(x=a))
self.makecycle(count(Int(0), Int(1)), a)
def test_cycle(self):
a = []
self.makecycle(cycle([a]*2), a)

18
Modules/itertoolsmodule.c
View File

@ -2954,7 +2954,7 @@ count_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
cnt == PY_SSIZE_T_MAX && long_cnt != NULL);
/* create countobject structure */
lz = (countobject *)PyObject_New(countobject, &count_type);
lz = (countobject *)type->tp_alloc(type, 0);
if (lz == NULL) {
Py_XDECREF(long_cnt);
return NULL;
@ -2969,9 +2969,17 @@ count_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
static void
count_dealloc(countobject *lz)
{
PyObject_GC_UnTrack(lz);
Py_XDECREF(lz->long_cnt);
Py_XDECREF(lz->long_step);
PyObject_Del(lz);
Py_TYPE(lz)->tp_free(lz);
}
count_traverse(countobject *lz, visitproc visit, void *arg)
{
Py_VISIT(lz->long_cnt);
Py_VISIT(lz->long_step);
return 0;
}
static PyObject *
@ -3058,9 +3066,10 @@ static PyTypeObject count_type = {
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_BASETYPE, /* tp_flags */
count_doc, /* tp_doc */
0, /* tp_traverse */
(traverseproc)count_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
@ -3077,6 +3086,7 @@ static PyTypeObject count_type = {
0, /* tp_init */
0, /* tp_alloc */
count_new, /* tp_new */
PyObject_GC_Del, /* tp_free */
};