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Re: Alternative to scm_protects?

From: Ludovic Courtès
Subject: Re: Alternative to scm_protects?
Date: Tue, 01 Jul 2014 11:54:04 +0200
User-agent: Gnus/5.130009 (Ma Gnus v0.9) Emacs/24.3 (gnu/linux)

Since Guile 2.0, which switched to BDW-GC, scm_protects has been mostly
irrelevant because BDW-GC scans all the C global variables.

Actually, libguile/gc.c in 2.0 reads this:

--8<---------------cut here---------------start------------->8---
/* Hash table that keeps a reference to objects the user wants to protect from
   garbage collection.  It could arguably be private but applications have come
   to rely on it (e.g., Lilypond 2.13.9).  */
SCM scm_protects;
static SCM scm_protects;
--8<---------------cut here---------------end--------------->8---

So the alternative to scm_protects should be just something like this:

  static SCM my_protects;

    my_protects = scm_cons (obj, my_protects); /* or a hash table */

Would it work for LilyPond?


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