add a comment to sweep algorithm

2013-11-22 07:30:29 -08:00 · 2013-11-22 07:30:29 -08:00 · 40bfe13895
parent 563b65efde
commit 40bfe13895
1 changed files with 1 additions and 1 deletions
--- a/src/gc.c
+++ b/src/gc.c
@ -449,7 +449,7 @@ gc_sweep_phase(pic_state *pic)
      continue;
    for (p = bp + bp->s.size; p != bp->s.ptr; p += p->s.size) {
      if (! gc_is_marked(p)) {
-	p->s.ptr = f;
+	p->s.ptr = f;		/* For dead objects we can safely reuse ptr field */
 	f = p;
      }
      gc_unmark(p);