base init

src/common/singleton.h

@@ -0,0 +1,44 @@
+#ifndef __INC_SINGLETON_H__
+#define __INC_SINGLETON_H__
+
+#include <assert.h>
+
+template <typename T> class singleton 
+{ 
+	public: 
+		static T * ms_singleton;
+
+		singleton()
+		{ 
+			assert(!ms_singleton);
+			long offset = (long) (T*) 1 - (long) (singleton <T>*) (T*) 1; 
+			ms_singleton = (T*) ((long) this + offset);
+		} 
+
+		virtual ~singleton()
+		{ 
+			assert(ms_singleton);
+			ms_singleton = 0; 
+		}
+
+		static T & instance()
+		{
+			assert(ms_singleton);
+			return (*ms_singleton);
+		}
+
+		static T & Instance()
+		{
+			assert(ms_singleton);
+			return (*ms_singleton);
+		}
+
+		static T * instance_ptr()
+		{
+			return (ms_singleton);
+		}
+};
+
+template <typename T> T * singleton <T>::ms_singleton = NULL;
+
+#endif