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- 4 commits
- 2 files changed
- 2 contributors
Commits on Oct 8, 2021
Commits on Jul 12, 2022
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My test application sometimes ends up in a kind of hangup. This happens quite often with clang-14 release builds, seldomly with gcc-10 release builds, not with debug builds. The hangup is a kind of busy-waiting state where two threads from a static thread pool are continually trying to wake each other, but not really succeeding because both are already awake. A third thread, that could allow the application to proceed, doesn't get the chance to continue. The cause seems to be that m_sleepingThreadCount is not reflecting the number of sleeping threads after a notify_intent_to_sleep() call where m_isSleeping was already set. This probably can happen due to a spurious wake-up (see comment above the try_clear_intent_to_sleep() call). The proposed solution ensures that m_sleepingThreadCount is not increased in such a situation.
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