Generic Event extension RFC
daniel at fooishbar.org
Tue Feb 20 15:43:10 PST 2007
On Wed, Feb 21, 2007 at 09:59:49AM +1030, Peter Hutterer wrote:
> X is running out of event codes, with only 15 or so left for future
> extensions. (Thanks for keithp for pointing that out at the XDC2007)
> I didn't want to get beaten up for using up the last event code for
> MPX, so I sat down the last few days and wrote the Generic Event
> The Generic Event extension is a template for future extensions to re-
> use a single opcode. GE doesn't actually do much but provide headers
> and a few API calls. The majority of the work is still to be done in
> the extensions.
> GE defines a single event, to be used by all extensions.
> BYTE type /* always GenericEvent type */
> CARD8 extension /* extension specific opcode */
> CARD16 sequenceNumber
> CARD8 evType; /* real event type */
> CARD8 pad0;
Go nuts. Use a CARD16. Otherwise, looks good to me.
(One thing you might consider, if you're pushing all this into a single
library which will be demarshalling anyway, is variable-sized events.
You'll be a hero if you do that, seriously.)
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