src/Pure/General/markup.ML
changeset 32738 15bb09ca0378
parent 31472 d7929d74acb4
child 33088 757d7787b10c
--- a/src/Pure/General/markup.ML	Tue Sep 29 11:48:32 2009 +0200
+++ b/src/Pure/General/markup.ML	Tue Sep 29 11:49:22 2009 +0200
@@ -323,10 +323,10 @@
 
 local
   val default = {output = default_output};
-  val modes = ref (Symtab.make [("", default)]);
+  val modes = Unsynchronized.ref (Symtab.make [("", default)]);
 in
   fun add_mode name output = CRITICAL (fn () =>
-    change modes (Symtab.update_new (name, {output = output})));
+    Unsynchronized.change modes (Symtab.update_new (name, {output = output})));
   fun get_mode () =
     the_default default (Library.get_first (Symtab.lookup (! modes)) (print_mode_value ()));
 end;