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Re: /dev/windows and select() [was Re: Slow response to keypresses in xorg-server-1.8.0-1]
- From: Brian Ford <Brian dot Ford at FlightSafety dot com>
- To: cygwin at cygwin dot com
- Date: Mon, 30 Aug 2010 12:49:01 -0500
- Subject: Re: /dev/windows and select() [was Re: Slow response to keypresses in xorg-server-1.8.0-1]
- References: <20100830112313.GN6726@calimero.vinschen.de>
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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