From: "Asbjørn Reglund Thorsen" <asbjoert@...>
Date: 2005-01-17T20:05:43+09:00
Subject: Re: [n00b] Garbage collection, Ruby C++ and SWIG

The header file is located at http://folk.uio.no/asbjoert/MenuSystem.h

On Sat, 15 Jan 2005, ts wrote:

>>>>>> "A" == =?ISO-8859-1?Q?Asbj=F8rn Reglund Thorsen?= <ISO-8859-1> writes:
>
> A> I`m having trouble with an interface to a c++ library. It seems like
> A> Ruby`s GC is collecting objects that it shouldn`t. I have read the
> A> SWIG-Ruby documentation on the matter, but I am unsure of where to put the
> A> markfunc , and how to get it to interact with my program.
>
> A> My interface file	: mHeat1.i
>
> Well, difficult to say without seeing the source but probably the problem
> has nothing to do with the mark function.
>
> A> #0  0x00000089 in ?? ()
> A> #1  0x40388c19 in free_MenuSystem () from ./mHeat1.so
> A> #2  0x0806f636 in rb_gc_call_finalizer_at_exit () at gc.c:1858
> A> #3  0x08053e34 in ruby_finalize_1 () at eval.c:1418
> A> #4  0x08053f43 in ruby_cleanup (ex=0) at eval.c:1453
> A> #5  0x08054081 in ruby_stop (ex=135573240) at eval.c:1484
>
> ruby is at the end (it will exist) and it call the finalizers : this is the
> normal operation.
>
> There are many reasons for such a crash :
>   * free_MenuSystem() is called twice
>   * the free function must be called in a predefined order
>   * ...
>
> Difficult to say more without the source.
>
> Guy Decoux
>
>