It still a very wanted feature, Miller mentioned doing work towards it within the pd source code itself for 0.48: https://lists.puredata.info/pipermail/pd-list/2017-01/117257.html

On Thu, Mar 2, 2017 at 10:46 AM, Giulio Moro via Pd-list <pd-list@lists.iem.at> wrote:
Hi,

I was wondering if this is still a wanted feature and if anyone did some further work on this beyond what is here
https://github.com/libpd/libpd/blob/master/samples/c/pdtest_multi/pdtest_multi.c

I peeked through the Pd Vanilla (0.46) source code last night, and I am under the impression that in order to allow more instances to coexist in a thread-safe way, all it takes is for each instance to have its own copy of "t_pdinstance *pd_this"  and for all the calls that currently use the global pd_this to take an additional argument "
t_pdinstance *pd_that".
But I also think that if it was that easy, someone else would have tried already.
So, before I dig into it just to hit a well known limitation, does anyone want to share their experience?


Thanks,
Giulio

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