X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fsmobs.cc;h=d1bea956d40375ac2fc8497c79355a0dd59bd899;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=63d36f23a57db8afd4fd42af4383da306ead9693;hpb=8536db51578c1d3ba3da834e5a308c2790dd4f87;p=lilypond.git

diff --git a/lily/smobs.cc b/lily/smobs.cc
index 63d36f23a5..d1bea956d4 100644
--- a/lily/smobs.cc
+++ b/lily/smobs.cc
@@ -1,60 +1,87 @@
 /*
-  smobs.cc -- implement Smob protection
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
 
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "smobs.hh"
 
-static SCM smob_protection_list;
+/*
+  The CDR contains the actual protected list.
+ */
+static SCM smob_protection_list = SCM_EOL;
 
 void
-init_smob_protection()
+init_smob_protection ()
+{
+  smob_protection_list = scm_cons (SCM_BOOL_F, SCM_EOL);
+  scm_gc_protect_object (smob_protection_list);
+}
+ADD_SCM_INIT_FUNC (init_smob_protection, init_smob_protection);
+
+LY_DEFINE (ly_smob_protects, "ly:smob-protects",
+           0, 0, 0, (),
+           "Return LilyPond's internal smob protection list.")
 {
-  smob_protection_list = scm_cons (SCM_UNDEFINED, SCM_EOL);
-  scm_permanent_object (smob_protection_list);
+  return scm_is_pair (smob_protection_list)
+         ? scm_cdr (smob_protection_list)
+         : SCM_EOL;
 }
-ADD_SCM_INIT_FUNC(init_smob_protection, init_smob_protection);
 
 void
 protect_smob (SCM smob, SCM *prot_cons)
 {
+#if 0
   SCM s = scm_cdr (smob_protection_list);
-  while (scm_is_pair (s) && scm_car (s) == SCM_UNDEFINED)
+  while (scm_is_pair (s) && scm_car (s) == SCM_BOOL_F)
     {
       s = scm_cdr (s);
     }
-
   SCM prot = scm_cons (smob, s);
   scm_set_cdr_x (smob_protection_list,
-		 prot);
+                 prot);
   *prot_cons = prot;
+#else
+  (void) prot_cons;
+  scm_gc_protect_object (smob);
+#endif
 }
 
 void
-unprotect_smob (SCM *prot_cons)
+unprotect_smob (SCM smob, SCM *prot_cons)
 {
+#if 1
+  (void) prot_cons;
+  scm_gc_unprotect_object (smob);
+#else
   SCM next = scm_cdr (*prot_cons);
 
   if (next == SCM_EOL)
-    {
-      scm_set_car_x (*prot_cons, SCM_UNDEFINED);
-    }
+    scm_set_car_x (*prot_cons, SCM_BOOL_F);
   else
     {
-      scm_set_car_x (*prot_cons, SCM_UNDEFINED);
+      scm_set_car_x (*prot_cons, SCM_BOOL_F);
       while (scm_is_pair (next)
-	     && scm_car (next) == SCM_UNDEFINED)
+             && scm_car (next) == SCM_BOOL_F)
 
-	{
-	  next = scm_cdr (next);
-	}
+        next = scm_cdr (next);
 
       scm_set_cdr_x (*prot_cons, next);
     }
 
   *prot_cons = SCM_EOL;
+#endif
 }