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Re: GC + Java finalization


From: Maxime Devos
Subject: Re: GC + Java finalization
Date: Fri, 19 Nov 2021 13:35:37 +0000
User-agent: Evolution 3.38.3-1

Jonas Hahnfeld schreef op vr 19-11-2021 om 14:32 [+0100]:
> You coud simply ...
>
>
> > -      scm_gc_free (rx, sizeof(regex_t), "regex");
> > +      free (rx);
>
> drop the scm_gc_free AFAIK.

No, I cannot as explained in the patch summary: If we use scm_gc_free
in a free function of a Smob, this relies on Java finalization because
the memory must not be reclaimed in the same cycle.

The suggestion was to remove scm_gc_free, and not introduce free.
I.e., don't free rx manually at all, let boehmgc decide:

 regex_free (SCM obj)
 {
   regfree (SCM_RGX (obj));
-  scm_gc_free (SCM_RGX (obj), sizeof(regex_t), "regex");
   return 0;
 }

Greetings,
Maxime

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