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gh-124153: Implement PyType_GetBaseByToken() and Py_tp_token slot #124163

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Merged
encukou merged 10 commits into from
Sep 18, 2024
Merged

gh-124153: Implement PyType_GetBaseByToken() and Py_tp_token slot #124163

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997e602
Implement the feature
neonene Sep 17, 2024
3f34cda
Use it in _ctypes
neonene Sep 17, 2024
8eb1988
NEWS
neonene Sep 17, 2024
97cfc14
edit a comment
neonene Sep 17, 2024
95640c4
typo
neonene Sep 17, 2024
ef49488
cleanup
neonene Sep 17, 2024
afd55a7
fix possible perf regression
neonene Sep 17, 2024
254c2e5
rely only on if-else statements to fix the perf
neonene Sep 18, 2024
fd8b40d
remove a comment
neonene Sep 18, 2024
d1d71e3
Merge branch 'main' into tp_token
neonene Sep 18, 2024
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@neonene
neonene committed Sep 17, 2024
commit 97cfc1454bc7ce8c5fa3b4fe9627b9e46cbf3fd5
3 changes: 2 additions & 1 deletion Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5377,7 +5377,8 @@ PyType_GetBaseByToken(PyTypeObject *type, void *token, PyTypeObject **result)
} while (0)

if (result == NULL) {
// It is best for this PGO performance to isolate the layout check
// If we check the `result` only here, the subsequent branches
// will become trivial to optimize.
return check_base_by_token(type, token);
}
if (token == NULL || !PyType_Check(type)) {
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