Re: Conversion Lua function to C function

[Asko Kauppi <askok@...>]

What he needs to do is store the Lua function entry as such (make a  
copy, forget about C pointers) in the Lua registry or a userdata's  
environment. This is a common need and many source codes will carry  
samples. Then have a C side common callback which picks up that stored  
ref to the Lua function and executes it. I've made a helper for all  
this but that code is not public.

- asko

On 17.10.2009, at 21.03, Wesley Smith <wesley.hoke@gmail.com> wrote:

> I don't completely follow, but you can store arbitrary function  
> pointers as lightuserdata.
>
> wes
>
> On Oct 17, 2009, at 1:47 AM, Jiří Prymus <jiri.prymus@gmail.com> wro 
> te:
>
> > Hi,
> >
> > I would like to know if there is any chance to convert lua function  
> > to
> > c function. I program a small opencv wrapper and there is one  
> > wrapping
> > function where I need pointer to function. And that's a problem
> > because I can get only pointer to Lua function and when I convert it
> > to C function then it does nothing. I know that lua functions are
> > stored in tables and that's probably why it  doesn't work.
> >
> > In fact my problem is function gtk_signal_connect(...) where slot
> > function is my lua function.
> >
> > Thanks for answer.
> >
> > With regards,
> > Jiri Prymus