gh-109917: Fix concurrent.future ProcessPoolExecutor locks#110137
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vstinner wants to merge 4 commits intopython:mainfrom
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gh-109917: Fix concurrent.future ProcessPoolExecutor locks#110137vstinner wants to merge 4 commits intopython:mainfrom
vstinner wants to merge 4 commits intopython:mainfrom
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…p.wakeup() Replace test_gh105829_should_not_deadlock_if_wakeup_pipe_full() test which was mocking too many concurrent.futures internals with a new test_wakeup() functional test. Co-Authored-By: elfstrom <elfstrom@users.noreply.github.com>
Add a lock to _ThreadWakeup which is used internally by _ThreadWakeup methods to serialize method calls to make the API thread safe. No longer use the shutdown lock to access _ThreadWakeup.
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@elfstrom @tomMoral: This change address the issue described by @elfstrom in #109917 (comment). This PR is based on PR gh-110129. I would prefer to first merge PR gh-110129 fix, and then see if this additional lock makes things safer... or worse :-) For me it's suspicious that the code is full of looooong comments explaining that: "please trust me, no lock is needed because (...). it /should/ be ok...". |
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