LTL_FUTEX_LOCK_PI
ltl_atom_update(current, LTL_FUTEX_LOCK_PI, true);
ltl_atom_set(mon, LTL_FUTEX_LOCK_PI, false);
ltl_atom_set(mon, LTL_FUTEX_LOCK_PI, false);
ltl_atom_set(mon, LTL_FUTEX_LOCK_PI, false);
bool futex_lock_pi = test_bit(LTL_FUTEX_LOCK_PI, mon->atoms);
bool futex_lock_pi = test_bit(LTL_FUTEX_LOCK_PI, mon->atoms);