How to call c function pointer in js?

[Zubnix]

The docs mention how to define a js function and use it as a C function pointer. How would one go the other way around?

I imagine this to be trivial as the lib already does this when searching for library symbols (which are just function pointers), and giving them the appropriate calling meta information. Yet I haven't found anything easily usable in the code.

[unbornchikken]

Supporting function pointers as a result type is yet to be developed feature. It shoukd work if you use the ffi compatible interface with Functions, excatly like with node-ffi, but there is no fastcall syntax and unit tests covering this fature yet.