在 2022/10/21 20:13, Jacek Caban 写道:
> 
> This is not true for past 15 years, CRITICAL_SECTIONS use something like RtlWaitOnAddress (an equivalent of futexes) since Vista, see Wine implementation for details:
> https://gitlab.winehq.org/wine/wine/-/blob/master/dlls/ntdll/sync.c#L190
> 
> 

Ah Jacek, nice to see you here.

I haven't dug into this too much, though. From my limited knowledge (mostly from reading 
disassembly) now CRITICAL_SECTION uses `NtWaitForAlertByThreadId` (and no longer keyed events or 
semaphores). As with `WaitOnAddress()`, there seems to be some global data structure, protected by a 
spin lock. It's just another undocumented syscall. Keyed events are still functional.


-- 
Best regards,
LIU Hao