NONRES_COOKIE_INVAL
if (__predict_false(cookie == NONRES_COOKIE_INVAL)) {
b->pages[j] = NONRES_COOKIE_INVAL;
if (b->pages[cur] != NONRES_COOKIE_INVAL) {
b->pages[cur] = NONRES_COOKIE_INVAL;
b->pages[i] = NONRES_COOKIE_INVAL;
if (b->pages[b->cur] != NONRES_COOKIE_INVAL) {