[PD] What exactly is a "stack overflow" ?

Andy Farnell padawan12 at obiwannabe.co.uk
Thu Dec 20 18:39:14 CET 2007

On Thu, 20 Dec 2007 10:43:57 -0600
"Charles Henry" <czhenry at gmail.com> wrote:

> On Dec 19, 2007 7:58 PM, Chris McCormick <chris at mccormick.cx> wrote:
> > On Wed, Dec 19, 2007 at 02:22:44PM +0000, Andy Farnell wrote:
> > > On Mon, 17 Dec 2007 22:23:11 +0100 IOhannes m zmoelnig <zmoelnig at iem.at> wrote:
> > > > but a [bang(--[until] is not meant to loop infinitely.
> > > > it loops until a certain condition is reached.
> > >
> > > As it stands the behaviour of [until] is correct, but it's a very dangerous
> > > object unlike almost every other Pd object it's the only one beginners can
> > > really screw up with.
> I think a useful feature that would perhaps be able to handle this
> type of problem is a 'halt'/'continue' routine for message processing.
>  Say, for example, it could be automatically handled during a stack
> overflow-clear the stack and send an error message.  Or triggered by
> the watchdog to catch bang/until problems.  Something like that would
> give you the opportunity to save/re-load or add additional objects to
> stop the infinite loop, when not intended.

The subject of the watchdog is really interesting and I'd love to 
hear a deeper discussion on it. But how do you propose to identify
an infinite loop? At what point does the watchdog say "Hi I'm Clippy
your Pd Watchdog... did you mean to create an infinite loop?"

> but it would still run into those problems of finding an arbitrary
> condition to trigger the 'halt'

Hmmmm, there's beard stroker. :)


> Chuck
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Use the source

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