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gh-91051: allow setting a callback hook on PyType_Modified #97875

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Oct 21, 2022
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6 changes: 4 additions & 2 deletions Objects/typeobject.c
Original file line number Diff line number Diff line change
Expand Up @@ -488,14 +488,16 @@ PyType_Modified(PyTypeObject *type)

if (type->tp_watched) {
PyInterpreterState *interp = _PyInterpreterState_GET();
char bits = type->tp_watched;
for (int i = 0; i < TYPE_MAX_WATCHERS; i++) {
int bits = type->tp_watched;
int i = 0;
while(bits && i < TYPE_MAX_WATCHERS) {
if (bits & 1) {
PyType_WatchCallback cb = interp->type_watchers[i];
if (cb && (cb(type) < 0)) {
PyErr_WriteUnraisable((PyObject *)type);
}
}
i += 1;
bits >>= 1;
}
}
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