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#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);
}
#ifdef TEST
int
main(void) {
return 0;
}
#endif
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