C++ 原子操作 std::atomic＜int＞

std::atomic模板类可以使对象操作为原子操作，避免多线程竞争问题；请看如下代码，一目了然

class Test
{
public:    
    Test() = default;

    void CThreadFunc()
    {
        for (int i = 0; i < 10000; ++i)
        {
            //std::lock_guard lck(Test::m_s_ivalue_mutex); //m_iValue需要加锁才可正常工作
            m_iValue++;

            m_atomic_value++;//不加锁，也可正常工作
        }
    }

    void Start()
    {
        std::vector threads;
        for (int i = 0; i < 10; ++i)
        {
            threads.push_back(std::thread(&Test::CThreadFunc, this));
        }

        for (auto& th : threads)
        {
            if (th.joinable())
            {
                th.join();
            }
        }　　　　 
        std::cout