static PyObject *
weakref___new__(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
PyWeakReference *self = NULL;
PyObject *ob, *callback = NULL;
if (parse_weakref_init_args("__new__", args, kwargs, &ob, &callback)) {
PyWeakReference *ref, *proxy;
PyWeakReference **list;
if (!PyType_SUPPORTS_WEAKREFS(ob->ob_type)) {
PyErr_Format(PyExc_TypeError,
"cannot create weak reference to '%s' object",
ob->ob_type->tp_name);
return NULL;
}
if (callback == Py_None)
callback = NULL;
list = GET_WEAKREFS_LISTPTR(ob);
get_basic_refs(*list, &ref, &proxy);
if (callback == NULL && type == &_PyWeakref_RefType) {
if (ref != NULL) {
/* We can re-use an existing reference. */
Py_INCREF(ref);
return (PyObject *)ref;
}
}
/* We have to create a new reference. */
/* Note: the tp_alloc() can trigger cyclic GC, so the weakref
list on ob can be mutated. This means that the ref and
proxy pointers we got back earlier may have been collected,
so we need to compute these values again before we use
them. */
self = (PyWeakReference *) (type->tp_alloc(type, 0));
if (self != NULL) {
init_weakref(self, ob, callback);
if (callback == NULL && type == &_PyWeakref_RefType) {
insert_head(self, list);
}
else {
PyWeakReference *prev;
get_basic_refs(*list, &ref, &proxy);
prev = (proxy == NULL) ? ref : proxy;
if (prev == NULL)
insert_head(self, list);
else
insert_after(self, prev);
}
}
}
return (PyObject *)self;
}
static PyWeakReference *
new_weakref(PyObject *ob, PyObject *callback)
{
PyWeakReference *result;
result = PyObject_GC_New(PyWeakReference, &_PyWeakref_RefType);
if (result) {
init_weakref(result, ob, callback);
PyObject_GC_Track(result);
}
return result;
}
static PyWeakReference *
new_weakref(PyObject *ob, PyObject *callback)
{
PyWeakReference *result;
// Pyston change: We can't use PyObject_GC_New because it will conservatively scan the memory.
// result = PyObject_GC_New(PyWeakReference, &_PyWeakref_RefType);
result = (PyWeakReference*)_PyWeakref_RefType.tp_alloc(&_PyWeakref_RefType, 0);
if (result) {
init_weakref(result, ob, callback);
PyObject_GC_Track(result);
}
return result;
}
