lily/grob-smob.cc

   1 /*
   2   grob-smob.cc -- implement GROB smob routines.
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "grob.hh"
  10
  11 #include "paper-score.hh"
  12 #include "warn.hh"
  13
  14 #include "ly-smobs.icc"
  15
  16 IMPLEMENT_SMOBS (Grob);
  17 IMPLEMENT_DEFAULT_EQUAL_P (Grob);
  18 IMPLEMENT_TYPE_P (Grob, "ly:grob?");
  19
  20 SCM
  21 Grob::mark_smob (SCM ses)
  22 {
  23   ASSERT_LIVE_IS_ALLOWED ();
  24
  25   Grob *s = (Grob *) SCM_CELL_WORD_1 (ses);
  26   scm_gc_mark (s->immutable_property_alist_);
  27
  28   /* Do not mark the parents.  The pointers in the mutable
  29      property list form two tree like structures (one for X
  30      relations, one for Y relations).  Marking these can be done
  31      in limited stack space.  If we add the parents, we will jump
  32      between X and Y in an erratic manner, leading to much more
  33      recursion depth (and core dumps if we link to pthreads).  */
  34
  35   if (s->original ())
  36     scm_gc_mark (s->original ()->self_scm ());
  37
  38   s->derived_mark ();
  39   scm_gc_mark (s->object_alist_);
  40   scm_gc_mark (s->interfaces_);
  41
  42   return s->mutable_property_alist_;
  43 }
  44
  45 int
  46 Grob::print_smob (SCM s, SCM port, scm_print_state *)
  47 {
  48   Grob *sc = (Grob *) SCM_CELL_WORD_1 (s);
  49
  50   scm_puts ("#<Grob ", port);
  51   scm_puts ((char *) sc->name ().c_str (), port);
  52
  53   /* Do not print properties, that is too much hassle.  */
  54   scm_puts (" >", port);
  55   return 1;
  56 }
  57
  58 void
  59 Grob::derived_mark () const
  60 {
  61 }