nicolas cellier wrote:
> Maybe a trick is possible at FFI level ? (pass an array of arguments)

That is indeed possible. For example:

MyClass>>initialize
   "Set up an ffi call"
   MyFFICall := ExternalLibraryFunction
     name: 'myfunction'
     module: 'mymodule'
     callType: FFICallTypeCDecl
     returnType: ExternalType char
     argumentTypes: {
       ExternalType ulong.
       ExternalType ulong.
       ExternalType ulong
       "..."
     }

This is exactly equivalent to, e.g.,

myFunction: arg1 with: arg2 with: arg3
   <cdecl: char 'myfunction' (ulong ulong ulong) module: 'mymodule'>

and can later be invoked via:

   MyFFICall invokeWithArguments: #(1 2 3).


Cheers,
   - Andreas