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GH-100000: Cleanup and polish various watchers code (GH-99998)

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* Initialize `type_watchers` array to `NULL`s
* Optimize code watchers notification
* Optimize func watchers notification
This commit is contained in:
Itamar Ostricher 2022-12-14 11:14:16 -08:00 • committed by GitHub
parent aa8591e9ca
commit ae83c78215
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6 changed files with 37 additions and 14 deletions
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7
Objects/typeobject.c
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@ -485,23 +485,24 @@ PyType_Modified(PyTypeObject *type)
}
}
// Notify registered type watchers, if any
if (type->tp_watched) {
PyInterpreterState *interp = _PyInterpreterState_GET();
int bits = type->tp_watched;
int i = 0;
while(bits && i < TYPE_MAX_WATCHERS) {
while (bits) {
assert(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;
i++;
bits >>= 1;
}
}
type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;
type->tp_version_tag = 0; /* 0 is not a valid version tag */
}