05:19 <archie1234132> Passing a callback, getting `extern "Python": function ... called, but @ffi.def_extern() was not called in the current subinterpreter. Returning 0.` I do call `@ffi.def_extern()`. May this have anything to do with the callback being invoked from a different thread? The thread is created internally by the C code though

08:07 <LarstiQ> archie1234132: `subinterpreter` is a hint I think

08:10 <archie1234132> yes but of what? I don't spawn any subinterps. different thread creaed from c doesn't automatically make another interp, does it?

08:11 <LarstiQ> I didn't think so, but I have not really looked into it

08:12 <LarstiQ> are you able to test from the same thread?

08:14 <archie1234132> hm, can I call an ffi.extern callback via ffi from python without making a c function just to call it directly?

08:24 <LarstiQ> you could .set_source, or do you mean without even C code from Python at all?

08:26 <archie1234132> I mean to test a cffi from the same thread. To test a callback from the same thread it seems I'd have to create a C function just to call the callback. Wondering if I can circumvent that step

08:37 <archie1234132> test a cffi callback