--- Oleg Kobchenko <[EMAIL PROTECTED]> wrote:
> --- "Miller, Raul D" <[EMAIL PROTECTED]> wrote:
>
> > Oleg Kobchenko wrote:
> > > the proof of concept pcall example is now turned into
> > > fully functional Addon. Windows is right now, but can
> > > easily be ported to UNIX, since the idea is trivial.
> >
> > Documentation suggests that C function 'inc' with definition:
> >
> > int inc(int x, int y) {return x+y;}
> >
> > Could be invoked as
> >
> > '0 12345 i i i' CONJ 3;4
> >
> > if 12345 were the address of inc
> >
> > But examples do not match this (I'm guessing they represent
> > something more like '1 XXX i i i' CONJ vti;...)
> >
> > This is probably not a big issue, since this is just example
> > code, but the examples use 'cp4', and I've not dissected the
> > demo to see what this means.
>
> You are guessing correctly, but the notation
> '0 12345 i i i' CONJ 3;4
> is the proposal to enhance 15!:0
>
> To make a proof of concept, it is now emulated by the pcall.dll.
> It has a sightly different approach: it has to have existing 15!:0 notation,
> which you use to call a pcall function with corresponding
> number of parameters, cp2 (or cc2) in this case and pass the
> as parameters function pointer and the rest are the original
> parameters. So it looks like
> 'pcall cp2 i i i i' cd 12345 ; 3;4
>
> There are three sets of such wrapper functions like cp2.
> http://www.jsoftware.com/svn/addons/trunk/general/pcall/win/pcall.c
>
> Two of them are just calling convention, where N is number
> of parameters N in (0..6):
> cpN - call pascall (stdcall)
> ccN - call cdecl
>
> The third set is for interface pointer call (using pascal
> convention as in COM)
> ciN - call interface
>
> The notation for ciN is
> 'pcall ci2 i i i i' cd 2;789 ; 3;4
>
> where 2 is vt-index and 789 is interface pointer "this"
>
> It will call method "inc", assuming that "this" is
> of such type A*:
>
> class A {
> virtual int __stdcall add(int x, int y);
> virtual int __stdcall dec(int x, int y);
> virtual int __stdcall inc(int x, int y); // vt-index = 2
> };
Correction:
The notation for ciN is
'pcall ci2 i i i i i' cd 2;789 ; 3;4
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