Re: [cc65] mouse irq callback

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From: Groepaz (groepaz_at_gmx.net)
Date: 2003-10-07 23:48:34


On Tuesday 07 October 2003 15:31, Ullrich von Bassewitz wrote:
> On Sat, Oct 04, 2003 at 09:41:03PM +0200, Groepaz wrote:
> > however, (in theory) there _is_ a irq handling api - see signal.h :=) all
> > it takes is implementing "alarm" for example, and then you can have timer
> > interupts (if the signal api works with c-code as signal handler that is,
> > didnt check that :=))
>
> I do still think that writing interrupt handlers in C is a bad idea because
> of the overhead involved, 

"alarm" might actually be one case where the overhead wouldnt matter that much 
(alarm usually isnt used for high-frequency irq) :)

> and because most people don't realize that you
> can do almost nothing in a signal handler, besides storing something into a
> variable of type sig_atomic_t.

yeah thats true.

gpz

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