[Bug libstdc++/78237] std::timed_mutex::try_lock_for/until affected by system realtime clock

[mac at mcrowe dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78237

Mike Crowe <mac at mcrowe dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |mac at mcrowe dot com

--- Comment #1 from Mike Crowe <mac at mcrowe dot com> ---
The fix for this is similar to the fix for 41861 if the new
pthread_mutex_clockwait function is used from glibc 2.30.

std::shared_timed_mutex is afflicted similarly and can be fixed with
pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock.

I'm working on fixes for both, but don't appear to have the required Bugzilla
privileges to assign this bug to me. :(