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1 #include "pthread_impl.h" | 1 #include "pthread_impl.h" |
2 | 2 |
3 void __wait(volatile int *addr, volatile int *waiters, int val, int priv) | 3 void __wait(volatile int* addr, volatile int* waiters, int val, int priv) { |
4 { | 4 int spins = 100; |
5 » int spins=100; | 5 if (priv) |
6 » if (priv) priv = FUTEX_PRIVATE; | 6 priv = FUTEX_PRIVATE; |
7 » while (spins-- && (!waiters || !*waiters)) { | 7 while (spins-- && (!waiters || !*waiters)) { |
8 » » if (*addr==val) a_spin(); | 8 if (*addr == val) |
9 » » else return; | 9 a_spin(); |
10 » } | 10 else |
11 » if (waiters) a_inc(waiters); | 11 return; |
12 » while (*addr==val) { | 12 } |
13 » » __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS | 13 if (waiters) |
14 » » || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); | 14 a_inc(waiters); |
15 » } | 15 while (*addr == val) { |
16 » if (waiters) a_dec(waiters); | 16 __syscall(SYS_futex, addr, FUTEX_WAIT | priv, val, 0) != -ENOSYS || |
| 17 __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); |
| 18 } |
| 19 if (waiters) |
| 20 a_dec(waiters); |
17 } | 21 } |
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