[PATCH v2 0/2] MR5044: ntdll: Fix some threadpool races.

[Paul Gofman (＠gofman)]

That seems to fix some (difficult to reproduce) crashes in EA Desktop / CEF, usually on shutdown but sometimes during starting up.

Currently TpSetWait can set (or clear) the event, while waitqueue_thread_proc() gets woken from NtWaitForMultipleObjects by previously set wait object and call the callback as if new set (or cleared) wait object is signaled. The crashes I was reproducing were always happening when RtlDeregisterWaitEx call is racing with waking the wait and calling the callback.

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  v2: ntdll: Make sure wakeups from already unset events are ignored in waitqueue_thread_proc().

https://gitlab.winehq.org/wine/wine/-/merge_requests/5044