1 #include "pthread_impl.h"
2
3 #ifdef ENABLE_HWASAN
4 __attribute__((no_sanitize("hwaddress")))
5 #endif
__wait(volatile int * addr,volatile int * waiters,int val,int priv)6 void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
7 {
8 int spins=100;
9 if (priv) priv = FUTEX_PRIVATE;
10 while (spins-- && (!waiters || !*waiters)) {
11 if (*addr==val) a_spin();
12 else return;
13 }
14 if (waiters) a_inc(waiters);
15 while (*addr==val) {
16 #ifdef __LITEOS_A__
17 __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0xffffffffu) != -ENOSYS
18 || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0xffffffffu);
19 #else
20 __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS
21 || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
22 #endif
23 }
24 if (waiters) a_dec(waiters);
25 }
26