[Bug 50292] Process-local synchronization objects use private interfaces into the Unix library

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50292

--- Comment #5 from Rémi Bernon <rbernon at codeweavers.com> ---
(In reply to Zebediah Figura from comment #4)
> (In reply to Rémi Bernon from comment #3)
> > (In reply to Rémi Bernon from comment #2)
> > > If FUTEX_WAIT_BITSET is available, I think you can use it to wait with
> > > an absolute timeout, which could save calls to NtQuerySystemTime.
> > 
> > Or maybe it's on purpose because of CLOCK_MONOTONIC NTP adjustments? In
> > which case please just ignore my comment.
> 
> Probably, yes, we'd need a RAW flag.

Actually, calling NtQuerySystemTime also suffers from the same issue, as from
what I can see, it uses CLOCK_MONOTONIC.

> Note though that the timeout is always
> relative when called through kernel32, so it doesn't help us much anyway.

Yes sure, and we always need to convert it to absolute first, but then we could
call futex_wait with the absolute timeout directly and drop the update_timeout
thing, making the code simpler.

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