ukn static run code/call func

gistfile1.cpp

#define UKN_STATIC_RUN_CODE_I(name, code) \
    namespace { \
        static struct name { \
            name() { \
                code; \
            } \
        } UKN_JOIN(g_, name); \
    }

#define UKN_STATIC_RUN_CODE(code) \
    UKN_STATIC_RUN_CODE_I(UKN_UNIQUE_NAME(UKN_static_), code) 

#define UKN_STATIC_CALL_FUNC_I(name, FN) \
    namespace { \
        static struct name { \
            name() { \
            static int counter = 0; \
            if(counter++ > 0) return; \
                FN(); \
            } \
        } g_##name; \
    }

#define UKN_STATIC_CALL_FUNC(FN) \
    UKN_STATIC_CALL_FUNC_I(UKN_static_init_##FN, FN)