/dev/windows and select() [was Re: Slow response to keypresses in xorg-server-1.8.0-1]

Brian Ford Brian.Ford@FlightSafety.com
Mon Aug 30 17:57:00 GMT 2010


On Mon, 30 Aug 2010, Corinna Vinschen wrote:

> I applied a patch to Cygwin which should make select on /dev/windows
> fully functional.
>
> The blessed solution is to replace the call to MsgWaitForMultipleObjects
> with a call to MsgWaitForMultipleObjectsEx with the MWMO_INPUTAVAILABLE
> flag set.  This flag is defined to do exactly what we need.

Just wondering, does this also effect select/poll on sockets in either 1.7
or 1.5?  I seem to remember a Windows event loop required for select on
sockets and wasn't sure if this change would be related.

A long time ago (1.5.18) I discovered a delay in select on sockets and
wondered if this might have been related.  I haven't retested in that long
since I found a work-around ;-).

-- 
Brian Ford
Staff Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained crew...

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