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gh-117657: Fix itertools.count thread safety #119267

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wants to merge 1 commit into from
Closed

gh-117657: Fix itertools.count thread safety #119267

wants to merge 1 commit into from

Commits on May 20, 2024

  1. Fix itertools.count in free-threading mode 

    Thread safety in count_next. count_next has two modes. slow mode
(obj->cnt set to PY_SSIZE_T_MAX), which now uses the object mutex
(only if GIL is disabled) and fast mode, which is either simple
cnt++  if GIL is enabled, or uses atomic_compare_exchange if
GIL is disabled.
    Arnon Yaari committed May 20, 2024
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