From: Friedrich Dominicus <frido@...>
Date: 2003-10-10T01:15:26+09:00
Subject: Re: I'm stuck

ts <decoux@moulon.inra.fr> writes:

> >>>>> "F" == Friedrich Dominicus <frido@q-software-solutions.com> writes:
> 
> F> ts <decoux@moulon.inra.fr> writes:
> >> >>>>> "F" == Friedrich Dominicus <frido@q-software-solutions.com> writes:
> >> 
> F> int main (void){
> F> int i;
> F> VALUE obj;
> F> VALUE klass;
> F> ruby_init(); /* embed Ruby into this program! */
> >> 
> >> /* At this step you are playing a dangerous game with the GC */
> F> what you you mean which this step ?
> F> ruby_init? How should I know what else to set up or use?
> 
>  Here a stupid example :
> 
>    int main(void)
>    {
>        char i;
>        VALUE obj;
>        VALUE klass;
> 
>        ruby_init();
>        obj = rb_str_new2("a string");
> 
>        /* call some ruby functions which call the GC */
> 
>        i = RSTRING(obj)->ptr[0];
> 
>        /* there are many chances than the String referenced by obj
>           was removed by the GC, and you have a segfault when you try
>           to access RSTRING(obj)->ptr[0] */
Ok I understand that now, what do I have to do that it does not
happen? 

What's the simplest but too safe way to solve my simple problem. I
just want the C side access the Ruby side as partly pointed out here. 

> 
>  You have also rb_load_protect() if you want to load a file and catch the
>  errors 
> 
>     rb_load_protect(VALUE path, int wrap, int *state);
Ok, thanks I'll try it with the Windows progrm.

Regards
Friedrich