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+/*
+ *           _                 _             _                 _          _____
+ * __   ____| |_ __      _ __ | |_   _  __ _(_)_ __         __| |_  ___ _|___ /
+ * \ \ / / _` | '__|____| '_ \| | | | |/ _` | | '_ \ _____ / _` \ \/ / '__||_ \
+ *  \ V / (_| | | |_____| |_) | | |_| | (_| | | | | |_____| (_| |>  <| |  ___) |
+ *   \_/ \__,_|_|       | .__/|_|\__,_|\__, |_|_| |_|      \__,_/_/\_\_| |____/
+ *                      |_|            |___/
+ *
+ * Copyright (C) 2004-2009 Christian Gmeiner
+ *
+ * This file is part of vdr-plugin-dxr3.
+ *
+ * vdr-plugin-dxr3 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 version 2.
+ *
+ * vdr-plugin-dxr3 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 dxr3-plugin.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef _SINGLETON_H_
+#define _SINGLETON_H_
+
+#include <memory>
+#include <vdr/thread.h>
+
+template <class T>
+class Singleton {
+public:
+    static T *instance() {
+
+        // use double-checked looking
+        // see http://en.wikipedia.org/wiki/Double-checked_locking
+        if (inst.get() == 0) {
+            m.Lock();
+            if (inst.get() == 0) {
+                inst = std::auto_ptr<T>(new T);
+            }
+            m.Unlock();
+        }
+
+        return inst.get();
+    }
+
+    virtual ~Singleton() { }
+
+protected:
+    Singleton() { }
+
+private:
+    static std::auto_ptr<T> inst;
+    static cMutex m;
+};
+
+template<class T>
+std::auto_ptr<T> Singleton<T>::inst(0);
+
+template<class T>
+cMutex Singleton<T>::m;
+
+#endif /*_SINGLETON_H_*/
+
+// Local variables:
+// mode: c++
+// c-file-style: "stroustrup"
+// c-file-offsets: ((inline-open . 0))
+// tab-width: 4;
+// indent-tabs-mode: nil
+// End: