gh-126434: Use multiprocessing.Value for multiprocessing.Event to avoid deadlock when there is reentrant usage of `set` from `is_set`, e.g. when handling system signals#126437

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ivarref wants to merge 14 commits intopython:mainfrom

ivarref:fix-issue-126434

Commits on Nov 11, 2024

gh-126434: Use multiprocessing.Value for multiprocessing.Event to avoid deadlock when there is reentrant usage of `set` from `is_set`, e.g. when handling system signals
ivarref
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Commits on Nov 12, 2024

Commits on Nov 13, 2024

gh-126434: Detect when .set() is called by a thread already .wait()-ing. Raise an exception if that is the case. Fix race condition in multiprocessing.Event.wait() as described in https://github.co…
ivarref
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Commits on Nov 28, 2024

gh-126434: Process signals on dedicated thread
ivarref
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