-void __lock_2(volatile int *l)
-{
- if (!__syscall(SYS_futex, l, FUTEX_LOCK_PI, 0, 0))
- return;
- int old, tid = __pthread_self()->tid;
- while ((old = a_cas(l, 0, tid))) {
- a_cas(l, old, old|INT_MIN);
- __syscall(SYS_futex, l, FUTEX_WAIT, old|INT_MIN, 0);
- }
-}
-