Function both

examples/quickstart/composable_guard.cpp:52–60

    // implicitly unlock l2
}
void both()
{
    // implicitly lock l1 and l2
    int tmp = i1.load();
    i1.compare_exchange_strong(tmp, tmp + 1);
    tmp = i2.load();
    i2.compare_exchange_strong(tmp, tmp + 1);
    // implicitly unlock l1 and l2
}

int increments = 3000;