Le Vendredi 12 Mai 2006 19:02, Andreas Raab a écrit :
> Viktor Svub wrote:
> > Isn't the number of parameters of the called function limited to some
> > fixed count?
>
> No. That's a limitation of Squeak not the FFI. The FFI can deal with
> arbitrary number of arguments but Squeak can't deal with more than 15
> right now. If you really need more you can still construct and invoke
> your FFI call manually; you just can't use the "inline" declaration.
>
> Cheers,
>    - Andreas

I faced the same problem, and was not fully satisfied with workaround proposed 
by andreas (build a ExternalLibraryFunction, store it in a class var, and 
invoke it with an array of arguments, see 
ExternalFunction>>invokeWithArguments:).

I have a working 3.9 image where i did overcome this limitation.
I can have Smalltalk methods with arbitrary number of arguments and FFI 
primitives called with many arguments also.

The trick is to transparently transform the arguments into a single array 
argument when Squeak bytecode limit is exceeded.

I did not published yet because decompiler and debugger facility do not work 
well on such methods. Also the installation order is not trivial because 
Compiler has to be changed.

However, if you're interested, let me know.

Nicolas