no engine anymore

public/tier1/interface.h

@@ -0,0 +1,28 @@
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+#include "tier0/platform.h"
+
+typedef void *( *CreateInterfaceFn )( const char *szName, int *pReturnCode );
+typedef void *( *InstantiateInterfaceFn )( void );
+
+class CInterfaceRegistry
+{
+public:
+	CInterfaceRegistry( InstantiateInterfaceFn fn, const char *szName );
+
+	InstantiateInterfaceFn m_CreateFn;
+	const char *m_szName;
+
+	CInterfaceRegistry *m_pNext;
+};
+
+
+#define EXPOSE_INTERFACE( className, interfaceName, versionName ) \
+	static void *__Create##className##_interface() { return ( interfaceName* )( new className ); }; \
+	static CInterfaceRegistry __Create##className##_registry( __Create##className##_interface, versionName );
+
+
+void *CreateInterface( const char *szName, int *pReturnCode );
+
+#endif