[PD] Checking for interest: Scheme interpreter external for PD

[Iain Duncan]

Oh sweeeet.  Yeah so far it's looking like this will be pretty
straightforward in comparison. :-)

Can anyone point me at docs or resources on that part of PD? Or do I just
need to go to the code? I've read through the git repo on learning to write
an external but didn't see much on how to interact with the scheduler. (the
stuff that in max uses the clocks and time objects and so on)

Thanks for the feedback everyone! I'm excited to make it happen.

On Fri, Oct 23, 2020 at 4:44 PM Miller Puckette <msp at ucsd.edu> wrote:

> Pd's a single thread - you'll have a much easier time adding stuff to
> Pd than to Max :)
>
> Miller
>
> On Fri, Oct 23, 2020 at 12:35:02PM -0700, Iain Duncan wrote:
> > Hi Andy, well I've ordered your book to learn PD, so I'm at least that
> > committed! :-)  My overarching goal is to make tools for composing,
> > improvising, and sequencing, so at this point, I'm punting on signals.
> > First I want to support everything in Rick Taubes's Notes From the
> > Metalevel book, along with a bunch of my own ideas, for algorithmic and
> > computer assisted composition/improvisation. But I am hoping to get
> signals
> > into play eventually. Which makes this a good time for a question...
> >
> > In Max, my understanding is that if Overdrive is on and Scheduler in
> > Interrupt is selected,  we actually get only two threads: low priority
> > thread running who knows when, and high priority thread alternating
> between
> > a pass of eating up the scheduler queue (up to the limit) and then a pass
> > of the audio vector render. So given that I'm forcing all messages to run
> > in the high priority thread (unless the user asks for danger-mode Any), I
> > *think* I should have no problem calling into S7 and sharing data from
> both
> > dsp perform routines and regular event scheduled messages. I have not,
> > however, actually done this yet. Can anyone tell me what the situation in
> > PD is there? Or point me at good docs/resources on how the threading and
> > scheduling works in PD?
> >
> > Thanks
> > iain
> >
> >
> > On Fri, Oct 23, 2020 at 12:23 PM Andy Farnell <
> padawan12 at obiwannabe.co.uk>
> > wrote:
> >
> > > My last love affair with parentheses was in Racket.
> > > Although my only ever somewhat successful musical adventures
> > > in this style were with Roger Dannenberg's CLM/Nyquist
> > >
> > > Lets see what happens if Iain brings S7 over.
> > >
> > > Iain, how are you thinking of handling signals
> > >  (or not)?
> > >
> > > andy
> > >
> > > On Fri, Oct 23, 2020 at 11:31:48AM +0200, Kjetil Matheussen wrote:
> > > > On Thu, Oct 22, 2020 at 10:26 AM Andy Farnell
> > > > <padawan12 at obiwannabe.co.uk> wrote:
> > > > >
> > > > > Would love to see Scheme come to Pd.
> > > > >
> > > > There's also k_guile from 2004, that still compiles:
> > > >
> https://urldefense.com/v3/__https://github.com/kmatheussen/k_guile__;!!Mih3wA!R6td8jy_IlJ5bOCoY02BZdcXbj7A38N3Ca1EA4vlqYbpelSmHtr_uAjQ6hgi$
> > > > Don't know if it still works though.
> > > >
> > > > Guess there are other alternatives as well, but they all probably
> > > > suffer a bit from gc non-rt performance. To fix this I later extended
> > > > the code from k_guile to run in a separate thread to avoid cpu
> spikes,
> > > > but this code was only added to the snd sound editor (when snd was
> > > > compiled as a pd external), and that code was probably removed from
> > > > snd when switching from guile to s7.
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