R8B-0 devpoll patch

[Artur Grabowski]

Per Bergqvist <per@REDACTED> writes:

> [snip]                                                                
>                                                                       
> > Unfortunately not all files support kqueues. Pipes, fifos, regular files
> > sockets and ttys, as well as processes and signals, are supported, but
> > more weird devices like usb stuff, audio, radio, etc. are not supported. 
>                                                                       
> Eventpoll in Linux has exactly the same problem. For this reason      
> I added poll support to the /dev/epoll device itself.                 
> By doing that I can have a smaller result with "weird" files on       
> which I actually call poll(). If readiness is indicated on the        
> eventpoll file descriptor I do a EP_POLL to get the actual            
> events.                                                               
>                                                                       
> Would it be possible to multiplex with kqueue in a similiar way ?     

Yes, you can select(2)/poll(2) on kqueue descriptors. You can also
register kqueue descriptors on another kqueue just to add to the
orthogonality.

//art