User data of epoll event is reported abnormally by epoll_wait.

[Daniel Murphy via Digitalmars-d]

"blake kim"  wrote in message news:slmejjrekoahgbmtitpo at forum.dlang.org...

> In my investigation, this problem appears by memory align mismatch.
>
> In C, sizeof(epoll_event) is 12 but D tells this is 
> 16.(epoll_event.sizeof)

With default alignment, the D layout must match the C layout.  I've fun a 
fuzz-tester on this on linux64, so you can be reasonable confident DMD will 
behave correctly for structs containing basic types.