8000 gh-111926: Simplify weakref/proxy creation by mpage · Pull Request #116825 · python/cpython · GitHub
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gh-111926: Simplify weakref/proxy creation #116825

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gh-111926: Simplify weakref/proxy creation #116825

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16 changes: 3 additions & 13 deletions Objects/weakrefobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -801,24 +801,14 @@ PyWeakref_NewRef(PyObject *ob, PyObject *callback)
if (result != NULL)
Py_INCREF(result);
else {
/* Note: new_weakref() 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. */
/* We do not need to recompute ref/proxy; new_weakref() cannot
trigger GC.
6861 */
result = new_weakref(ob, callback);
if (result != NULL) {
get_basic_refs(*list, &ref, &proxy);
if (callback == NULL) {
if (ref == NULL)
insert_head(result, list);
else {
/* Someone else added a ref without a callback
during GC. Return that one instead of this one
to avoid violating the invariants of the list
of weakrefs for ob. */
Py_SETREF(result, (PyWeakReference*)Py_NewRef(ref));
}
}
else {
PyWeakReference *prev;
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