GORET
GORET(3, UU_LOCK_WRITE_ERR);
GORET(1, (i >= MAXTRIES) ? UU_LOCK_TRY_ERR : UU_LOCK_OK);
GORET(0, UU_LOCK_CREAT_ERR);
GORET(1, UU_LOCK_LINK_ERR);
GORET(1, UU_LOCK_OPEN_ERR);
GORET(2, UU_LOCK_READ_ERR);
GORET(1, UU_LOCK_INUSE);