lily/grob-smob.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "grob.hh"
  21
  22 #include "paper-score.hh"
  23 #include "warn.hh"
  24
  25 #include "ly-smobs.icc"
  26
  27 IMPLEMENT_SMOBS (Grob);
  28 IMPLEMENT_DEFAULT_EQUAL_P (Grob);
  29 IMPLEMENT_TYPE_P (Grob, "ly:grob?");
  30
  31 SCM
  32 Grob::mark_smob (SCM ses)
  33 {
  34   ASSERT_LIVE_IS_ALLOWED ();
  35
  36   Grob *s = (Grob *) SCM_CELL_WORD_1 (ses);
  37   scm_gc_mark (s->immutable_property_alist_);
  38
  39   /* Do not mark the parents.  The pointers in the mutable
  40      property list form two tree like structures (one for X
  41      relations, one for Y relations).  Marking these can be done
  42      in limited stack space.  If we add the parents, we will jump
  43      between X and Y in an erratic manner, leading to much more
  44      recursion depth (and core dumps if we link to pthreads).  */
  45
  46   if (s->original ())
  47     scm_gc_mark (s->original ()->self_scm ());
  48
  49   s->derived_mark ();
  50   scm_gc_mark (s->object_alist_);
  51   scm_gc_mark (s->interfaces_);
  52
  53   return s->mutable_property_alist_;
  54 }
  55
  56 int
  57 Grob::print_smob (SCM s, SCM port, scm_print_state *)
  58 {
  59   Grob *sc = (Grob *) SCM_CELL_WORD_1 (s);
  60
  61   scm_puts ("#<Grob ", port);
  62   scm_puts ((char *) sc->name ().c_str (), port);
  63
  64   /* Do not print properties, that is too much hassle.  */
  65   scm_puts (" >", port);
  66   return 1;
  67 }
  68
  69 void
  70 Grob::derived_mark () const
  71 {
  72 }