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gh-123471: Make concurrent iteration over itertools.repeat safe under free-threading #131247

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Merged
kumaraditya303 merged 3 commits into from
Apr 13, 2025
Merged

gh-123471: Make concurrent iteration over itertools.repeat safe under free-threading #131247

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bc30930
make repeat_next ft safe
eendebakpt Mar 14, 2025
2037e3d
📜🤖 Added by blurb_it.
blurb-it[bot] Mar 14, 2025
65daaee
fix
eendebakpt Mar 14, 2025
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fix
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@eendebakpt
eendebakpt committed Mar 14, 2025
commit 65daaeec797f75b812ff289422acfb3425c2d86f
7 changes: 4 additions & 3 deletions Modules/itertoolsmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3634,9 +3634,10 @@ repeat_next(PyObject *op)
if (cnt == 0) {
return NULL;
}
cnt--;
assert(cnt >=0);
FT_ATOMIC_STORE_SSIZE_RELAXED(ro->cnt, cnt);
if (cnt > 0) {
cnt--;
FT_ATOMIC_STORE_SSIZE_RELAXED(ro->cnt, cnt);
}
return Py_NewRef(ro->element);
}

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