Function futex

src/fastlock.cpp:199–204

#ifdef __linux__
static int futex(volatile unsigned *uaddr, int futex_op, int val,
    const struct timespec *timeout, int val3)
{
    return syscall(SYS_futex, uaddr, futex_op, val,
                    timeout, uaddr, val3);
}
#endif

class DeadlockDetector