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fix race where poll state is changed in unblock and reset #65

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fix race where poll state is changed in unblock and reset #65

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markniebur
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pollDesc.unblock(), which modifies either pd.rdState or pd.wrState is called by the pollserver thread and only locks pd.lock. However, pd.reset which is called by read/write operations only locks pd.wrLock or pd.rdLock leading to a race.

@michaeljdennis michaeljdennis mentioned this pull request Sep 22, 2023
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