589   Table *mt = NULL;  in lua_getmetatable()  local
595       mt = hvalue(obj)->metatable;  in lua_getmetatable()
598       mt = uvalue(obj)->metatable;  in lua_getmetatable()
601       mt = G(L)->mt[ttype(obj)];  in lua_getmetatable()
604   if (mt == NULL)  in lua_getmetatable()
607     sethvalue(L, L->top, mt);  in lua_getmetatable()
699   Table *mt;  in lua_setmetatable()  local
705     mt = NULL;  in lua_setmetatable()
708     mt = hvalue(L->top - 1);  in lua_setmetatable()
712       hvalue(obj)->metatable = mt;  in lua_setmetatable()
713       if (mt)  in lua_setmetatable()
714         luaC_objbarriert(L, hvalue(obj), mt);  in lua_setmetatable()
718       uvalue(obj)->metatable = mt;  in lua_setmetatable()
719       if (mt)  in lua_setmetatable()
720         luaC_objbarrier(L, rawuvalue(obj), mt);  in lua_setmetatable()
724       G(L)->mt[ttype(obj)] = mt;  in lua_setmetatable()