Re: Generic battery interface

Vojtech Pavlik
2006-07-30T11:44:51Z

On Sun, Jul 30, 2006 at 04:35:57AM -0400, Valdis.Kletnieks@vt.edu wrote:
> On Sat, 29 Jul 2006 12:48:51 +0300, Shem Multinymous said:
>
> > The lazy polling approach I described in my last post to Vojtech
> > ("block until there's a new readout or N milliseconds have passed,
> > whichever is later") looks like a more general, accurate and efficient
> > interface.
>
> That's not good.
>
> If the program says '100ms' because it knows it will need to do a GUI update
> then, and you block it for 5 seconds because that's when the next value
> update happens, the user is stuck looking at their gkrellm or whatever not
> doing anything at all for 4.9 seconds....
>
> This almost forces the use of multiple threads if the program wants to do
> its own timer management.

The application can use select() to wait both for any X events it needs
to service and for the data update at the same time, right?

--
Vojtech Pavlik
Director SuSE Labs