C ++ 11 std :: thread以单独的方法连接到主线程

I have the following code:

我有以下代码:

void do_join(std::thread& t)
{
    t.join();
}

void join_all(std::vector<std::thread>& v)
{
    std::for_each(v.begin(),v.end(),do_join);
}

int main()
{         
    std::vector<std::thread> myThreads;

    for(int i = 1; i <= 3; i++)
    {

        myThreads.push_back(std::thread(threadMethod));

    }


    join_all(myThreads);
}
void do_