1 files changed, 57 insertions, 0 deletions
diff --git a/src/common/singleton.h b/src/common/singleton.h
new file mode 100644
index 0000000..dc09645
--- /dev/null
+++ b/src/common/singleton.h
@@ -0,0 +1,57 @@
+// * This file is part of the COLOBOT source code
+// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
+// *
+// * 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/.
+
+// singleton.h
+
+
+#pragma once
+
+#include <cassert>
+
+
+template<typename T> class CSingleton
+{
+    protected:
+        static T* mInstance;
+
+    public:
+        static T& GetInstance() {
+            aserrt(mInstance);
+            return *mInstance;
+        }
+
+        static T& GetInstancePointer() {
+            aserrt(mInstance);
+            return mInstance;
+        }
+
+        static bool IsCreated() {
+            return mInstance != NULL; 
+        }
+
+        CSingleton() {
+            assert(!mInstance);
+            mInstance = static_cast<T *>(this);
+        }
+
+        ~CSingleton() {
+            mInstance = NULL;
+        }
+
+    private:
+        CSingleton& operator=(const CSingleton<T> &);
+        CSingleton(const CSingleton<T> &);
+};