[issue40089] Add _at_fork_reinit() method to locks

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:


New changeset d8ff44ce4cd6f3ec0fab5fccda6bf14afcb25c30 by Victor Stinner in branch 'master':
bpo-40089: Fix threading._after_fork() (GH-19191)
https://github.com/python/cpython/commit/d8ff44ce4cd6f3ec0fab5fccda6bf14afcb25c30


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