Re: event mixer patch

[Charles D. <cd...@mv...>]

On Tue, Jun 19, 2001 at 03:48:01PM -0700, James Simmons wrote:
> > Maybe it should be a separate module providing a whole class of
> > event mix devices, with all EV_KEY and EV_REL mixed on
> > /dev/eventmix0 by default. Then there could be ioctl's to attach
> > and detach single event devices onto the mixer devices.
>=20
> The real underlying problem is knowing when a device gets attached
> and detached. How do we know that? It is not easy to solve. A mixer
> sort of gets around this problem. Then we run into the problem of
> EV_ABS type devices. The mixer device could be used to tell us when
> a new device is added or subtracted. Then we can decided to add the
> new device to the mixer.=20

If some changes were made to the data structure, it should be possible
to provide attach/detach notices through the mixer, as well as
informing applications of which device an event came from.

I'll try writing a mixer device which does this some time between now
and this weekend, inclusive.