RCFUNC_DATA       127 ext/dl/cptr.c      f = NIL_P(sym) ? NULL : RCFUNC_DATA(sym)->ptr;
RCFUNC_DATA       161 ext/dl/cptr.c      f = RCFUNC_DATA(sym)->ptr;
RCFUNC_DATA       224 ext/dl/cptr.c        data->free = RCFUNC_DATA(val)->ptr;