| 1 | #include "pthread_impl.h" |
| 2 | |
| 3 | void __wait(volatile int *addr, volatile int *waiters, int val, int priv) |
| 4 | { |
| 5 | int spins=100; |
| 6 | if (priv) priv = FUTEX_PRIVATE; |
| 7 | while (spins-- && (!waiters || !*waiters)) { |
| 8 | if (*addr==val) a_spin(); |
| 9 | else return; |
| 10 | } |
| 11 | if (waiters) a_inc(waiters); |
| 12 | while (*addr==val) { |
| 13 | __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS |
| 14 | || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); |
| 15 | } |
| 16 | if (waiters) a_dec(waiters); |
| 17 | } |