F_CLR
F_CLR(t, B_MODIFIED);
F_CLR(c, CURS_AFTER | CURS_BEFORE | CURS_ACQUIRE);
F_CLR(t, B_NEEDSWAP);
usecurrent: F_CLR(c, CURS_AFTER | CURS_BEFORE);
F_CLR(&t->bt_cursor, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
F_CLR(t, R_MODIFIED);
F_CLR(h, P_TYPE);
F_CLR(t, B_MODIFIED);
F_CLR(c, CURS_AFTER | CURS_BEFORE | CURS_ACQUIRE);
F_CLR(t, B_NEEDSWAP);
usecurrent: F_CLR(c, CURS_AFTER | CURS_BEFORE);
F_CLR(&t->bt_cursor, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
F_CLR(t, R_MODIFIED);
F_CLR(h, P_TYPE);