Sorry to bug you again, but I'm trying to work out how I could have gotten to the working solution without your having to lead me by the nose.
Note that call_sv() can take a CV as an arg
Is this written down somewhere I should have been looking? Or is it something you picked up/worked out from experience.
Also, you led me to using g_rec = SvREFCNT_inc(SvRV(rec)); to safely replicate the CV* for the callback and detailed the need to decrement the refcount before replacing the CV*, if the callback addesses are changed.
In perlcall, they suggest a combination of newSVsv() and SvSetSV() to do this, which if I've unwound the macros correctly, amounts to much the same thing, except that your way sheds a level of indirection?
Did I understand that right? Can you see any particular advantage of one over the other?
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