[Bug 55947] Serial port event waits should use async I/O

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55947

--- Comment #6 from Maotong Zhang  ---
(In reply to Zeb Figura from comment #3)
> We're using NtCreateThreadEx() on the Unix side, which can't work. That
> should be converted to a proper server async.

I have researched and I don't know how to implement this function. What do I
need to do to implement this function. Thank you.