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Make sets and deques weak referencable.

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This commit is contained in:
Raymond Hettinger 2004-05-30 07:26:47 +00:00
parent d70ad8a9d9
commit 691d80532b
5 changed files with 32 additions and 6 deletions
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10
Modules/collectionsmodule.c
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@ -1,4 +1,5 @@
#include "Python.h"
#include "structmember.h"
/* collections module implementation of a deque() datatype
Written and maintained by Raymond D. Hettinger <python@rcn.com>
@ -32,6 +33,7 @@ typedef struct {
int leftindex;
int rightindex;
int len;
PyObject *weakreflist; /* List of weak references */
} dequeobject;
static PyTypeObject deque_type;
@ -58,6 +60,7 @@ deque_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
deque->leftindex = BLOCKLEN / 2 + 1;
deque->rightindex = BLOCKLEN / 2;
deque->len = 0;
deque->weakreflist = NULL;
return (PyObject *)deque;
}
@ -439,6 +442,8 @@ static void
deque_dealloc(dequeobject *deque)
{
PyObject_GC_UnTrack(deque);
if (deque->weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) deque);
if (deque->leftblock != NULL) {
int err = deque_clear(deque);
assert(err == 0);
@ -744,12 +749,13 @@ static PyTypeObject deque_type = {
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
deque_doc, /* tp_doc */
(traverseproc)deque_traverse, /* tp_traverse */
(inquiry)deque_clear, /* tp_clear */
(richcmpfunc)deque_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset*/
offsetof(dequeobject, weakreflist), /* tp_weaklistoffset*/
(getiterfunc)deque_iter, /* tp_iter */
0, /* tp_iternext */
deque_methods, /* tp_methods */