Hi all,

I think this discussion should get posted to the list also. It refers to Larry's pd-scheme extern and the possibility to access the embedded scheme through an external console.

Am Mittwoch, den 27. Februar 2002 um 09:30:44 Uhr (-0500) schrieb Larry Troxler:

On Wed, 27 Feb 2002, Orm Finnendahl wrote:

...

Concerning the reloading of objects: I thought of adding two "plugs" to the object (via pipes) which make it possible to communicate with it through emacs. You just replace the inferior scheme program to call from emacs with some program which accesses those pipes and start up pd and pd-scheme before you connect to it from emacs. That way you have access to all bindings in scheme through emacs and can skip the whole reloading process in pd altogether.

I think that's an excellent idea - it would be nice to have a real interpreter console!

I'm not sure how the extern would read and write the pipes, however. I'm away from my PD computer at the moment so can't look at the sources to see how it would be done. I imagine it must be possible for the extern to register a function that gets periodically called to poll the pipe? Spawning a task could be another possibility, but probably SIOD is not re-entrant. Have you thought about this yet?

I imagined the following: You schedule clock events within pd to call the polling function. This functions sets a new clock event each time it is called. The polling could be done at something like once every 100 ms or so and there should be the possibility to send a message to the object telling it to turn polling on/off in order ot avoid unnecessary system load (which isn't all that big anyway).

I don't relly know the way to access siod with c strings from within pd. I guess, a newline is interpreted as string terminator so this has to get filtered out if you want to evaluate a whole buffer (or does emacs filter out the newlines already when you issue M-x eval-buffer?) In addition the input buffersize for processing in pd has to be sufficiently big and I'm not sure how to do that dynamically.

Orm