Hey everyone --

I'm new to this list, so sorry if I'm missing out on some obvious documentation somewhere! I'm updating some objects (rtcmix~) for pd, and I've run into a small clean-up issue. When I delete my objects, or close the patch, the free() function gets called and I can do the clean-up. But when I quit pd, it doesn't get called (no need to really). I tried installing a signal-handler to catch the quit, but to no avail, Is there any way to do this?

brad

You could use GCC __attribute__((destructor)) syntax IIRC but it is not fully portable.

EDIT: Do you mean that the free() function is not called when the object is freed (with an opened patch) at shutdown?

@Nicolas-Danet said:

attribute((destructor))

Yes -- if I have an open patch with my object in it, the free() function for that object does not execute when I quit pd.

But your attribute((destructor)) approach seems to work! Thanks!

brad

@bgarton just fyi, aside from the object-specific destructor it's also possible to have a class destructor with class_setfreefn (I only mention it bc it isn't documented in the writing externals tutorial)

@seb-harmonik.ar Thanks! I was not aware of class_setfreefn, i guess it has been recently introduced. Good to know, and probably more portable than my trick.

@bgarton The fact that the free function is not called seems a bug (or a very bad things). (Note that i never did externals for Pd, thus i don't know if it is a well known behavior or an issue).