1 files changed, 63 insertions, 0 deletions
diff --git a/src/Common/SingletonPtr.h b/src/Common/SingletonPtr.h
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+++ b/src/Common/SingletonPtr.h
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+/*
+ * SingletonPtr.h
+ *
+ * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program 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.
+ *
+ * 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/>.
+ */
+
+#ifndef MAD_COMMON_SINGLETONPTR_H_
+#define MAD_COMMON_SINGLETONPTR_H_
+
+#include "Initializable.h"
+
+namespace Mad {
+namespace Common {
+
+template <typename T>
+class SingletonPtr : public virtual Initializable {
+  private:
+    T *ptr;
+
+  protected:
+    virtual void doInit() {
+      if(ptr)
+        delete ptr;
+
+      ptr = new T();
+
+      Initializable *in = dynamic_cast<Initializable*>(ptr);
+      if(in)
+        in->init();
+    }
+
+  public:
+    SingletonPtr() : ptr(0) {}
+
+    virtual ~SingletonPtr() {
+      delete ptr;
+    }
+
+    T *get() {
+      if(!ptr)
+        init();
+
+      return ptr;
+    }
+};
+
+}
+}
+
+#endif /* MAD_COMMON_SINGLETONPTR_H_ */