--- /dev/null
+
+///////////////////////////////////////////////////////////////////////////
+// This program is free software: you can redistribute it and/or modify //
+// it under the terms of the version 3 of the GNU General Public License //
+// as published by the Free Software Foundation. //
+// //
+// This program 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 this program. If not, see <http://www.gnu.org/licenses/>. //
+// //
+// Written by Francois Fleuret, (C) IDIAP //
+// Contact <francois.fleuret@idiap.ch> for comments & bug reports //
+///////////////////////////////////////////////////////////////////////////
+
+// A tiny class to implement shared objects and lazy deletion
+
+// When you create a reference to such an object, call grab(), and
+// when you destroy that reference, call release() which will delete
+// it if no reference remains. Never delete it yourself!
+
+#ifndef SHARED_H
+#define SHARED_H
+
+#include "misc.h"
+
+class Shared {
+ int _nb_refs;
+public:
+ Shared();
+ virtual ~Shared();
+ void grab();
+ void release();
+};
+
+#endif