Re: smobs

[Marius Vollmer]

"Dr. Peter Ivanyi" <address@hidden> writes:

> For example is this correct:
> 
> static scm_t_bits data_tag = 0;
> 
> static SCM make_my_data(SCM scm_data)
> {
>   int tt;
> 
>   SCM_ASSERT(SCM_INUM(scm_data), ...);
> 
>   tt = SCM_INUM(scm_data);
>   
>   SCM_RETURN_NEWSMOB(data_tag, tt);
> }

Yes, you can do that.  You need to return 0 in your smob free routine
then.

[ BTW: The memory management for smobs will be much nicer in the 1.8
  series of Guile. ]

> Moreover with the above example every time the function is called
> "tt" will be created on the stack. Will guile see it properly?

Since "tt" does not hold a SCM object (it is just an "int"), Guile
does not need to see it.  

> Will the stack be maintained correctly?  Does that mean that unless
> my integer object is released that stack is growing?

I don't understand.  "tt" is a totally ordinary local C variable that
behaves like any other local C variable.

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