T. Wouters 180d417e9f gh-114203: Optimise simple recursive critical sections (#128126) ...

Add a fast path to (single-mutex) critical section locking _iff_ the mutex
is already held by the currently active, top-most critical section of this
thread. This can matter a lot for indirectly recursive critical sections
without intervening critical sections.

2024-12-23 13:31:33 +01:00

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