Andrey Semashev 5991e99381 Added timed wait operations to lock pool. ...

Added a configure test for pthread_cond_clockwait presence. If it is
available, use it for timed waits with absolute timeouts on POSIX platforms.

Futex-based implementation has been improvved to use proper atomic operations
to access m_cond, which is needed to avoid races between the futex syscall and
our notifying operations. Also, check if m_cond has changed whil looping in
the waiting operations.

2025-06-08 04:37:51 +03:00

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