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Title: gh-123471: Make concurrent iteration over itertools.pairwise thread-safe by eendebakpt · Pull Request #144489 · python/cpython · GitHub

Open Graph Title: gh-123471: Make concurrent iteration over itertools.pairwise thread-safe by eendebakpt · Pull Request #144489 · python/cpython

X Title: gh-123471: Make concurrent iteration over itertools.pairwise thread-safe by eendebakpt · Pull Request #144489 · python/cpython

Description: We use a critical section similar to the approach in #132814. The ideas from an earlier PR #125417 are too complex (or not sufficient for thread-safety). We also avoid an incref/decref pair. Issue: gh-123471

Open Graph Description: We use a critical section similar to the approach in #132814. The ideas from an earlier PR #125417 are too complex (or not sufficient for thread-safety). We also avoid an incref/decref pair. Iss...

X Description: We use a critical section similar to the approach in #132814. The ideas from an earlier PR #125417 are too complex (or not sufficient for thread-safety). We also avoid an incref/decref pair. Iss...

Opengraph URL: https://github.com/python/cpython/pull/144489

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8810175 add test for pairwise eendebakpt Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/88101755c042ca323177f4d91130e7fb02bc9218
11e727d Make itertools.pairwise safe in the FT build eendebakpt Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/11e727dd28aa9f27b6d9e0888152aef3052c41f4
a91f13c add comment for incref rationale eendebakpt Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/a91f13ceab22568bdead16c9f4188e6e4302d4cc
931b2f9 add comment for incref rationale eendebakpt Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/931b2f9f17ddee4c944fa840e6291289798a26ef
a030f5a 📜🤖 Added by blurb_it. blurb-it[bot] Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/a030f5ad7a50d907b28b81f982e5fba13eb09ef6
9c87957 Merge branch 'pairwise_ft_v3' of github.com:eendebakpt/cpython into p… eendebakpt Feb 4, 2026 https://github.com/python/cpython/pull/144489/commits/9c87957d8fdeb952d270e97cfbb94aabe268555d
78eabbc Merge remote-tracking branch 'origin/main' into pairwise_ft_v3 eendebakpt Apr 27, 2026 https://github.com/python/cpython/pull/144489/commits/78eabbc87d0d4a0941df143cbb9a1f3c24bc43ef
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