| #include "pthread_impl.h" | |
| void __wait(volatile int *addr, volatile int *waiters, int val, int priv) | |
| { | |
| int spins=100; | |
| if (priv) priv = FUTEX_PRIVATE; | |
| while (spins-- && (!waiters || !*waiters)) { | |
| if (*addr==val) a_spin(); | |
| else return; | |
| } | |
| if (waiters) a_inc(waiters); | |
| while (*addr==val) { | |
| __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS | |
| || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); | |
| } | |
| if (waiters) a_dec(waiters); | |
| } |