[Bug 45524] Add a futex-based implementation of condition variables

https://bugs.winehq.org/show_bug.cgi?id=45524

--- Comment #5 from Zebediah Figura  ---
I'm sorry; I'm not sure I understand. If you mean implementing keyed events on
top of futexes; I'm not sure that'll work since I don't think the key has to be
a valid pointer (whereas for futexes it absolutely must be). If your concern is
with the architecture of the patch, I just followed the model used in critical
sections.