gh-92530: Fix an issue that occurred after interrupting threading.Condition.notify #92534
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…ng.Condition.notify
serhiy-storchaka
added
type-bug
hauntsaninja
reviewed
May 12, 2022
Removing the deque entirely undoes the optimisation from https://bugs.python.org/issue17385
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No, |
methane
approved these changes
May 16, 2022
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Thanks @serhiy-storchaka for the PR |
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GH-92829 is a backport of this pull request to the 3.11 branch. |
miss-islington
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May 16, 2022
…ng.Condition.notify (pythonGH-92534) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
miss-islington
pushed a commit
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May 16, 2022
…ng.Condition.notify (pythonGH-92534) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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GH-92830 is a backport of this pull request to the 3.10 branch. |
miss-islington
pushed a commit
to miss-islington/cpython
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May 16, 2022
…ng.Condition.notify (pythonGH-92534) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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GH-92831 is a backport of this pull request to the 3.9 branch. |
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I reviewed your fix twice. Ok, now it makes sense and the comment is enough to explain the fix and the code. It might be safe to check if the waiter is already released by calling the .locked() method, but I don't think that it's worth it and it might introduce new subtle concurrency issues. In short, the fix is correct :-) |
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EAFP is so superior to LBYL here, that the latter I did not even consider. |
ambv
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May 16, 2022
…dition.notify (GH-92534) (GH-92831) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
ambv
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May 16, 2022
…dition.notify (GH-92534) (GH-92830) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
miss-islington
added a commit
that referenced
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May 17, 2022
…ing.Condition.notify (GH-92534) (GH-92829) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Automerge-Triggered-By: GH:serhiy-storchaka
hello-adam
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Jun 2, 2022
…ng.Condition.notify (pythonGH-92534) (pythonGH-92831) If Condition.notify() was interrupted just after it released the waiter lock, but before removing it from the queue, the following calls of notify() failed with RuntimeError: cannot release un-acquired lock. (cherry picked from commit 70af994) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Fixes #92530.