线程停止的奇怪问题

Question

       １.

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　　 /// <summary>
        /// 用来判断是否停止线程的变量
        /// </summary>
        private  volatile bool m_stopThread=false;
        private Thread m_threadStartSendMusic;

        /// <summary>
        /// 开始发送
        /// </summary>
        public void SendMusicInThread(int startcount,int sendcount,string sbip)
        {
            //若有在发送数据　停止发送
            m_stopThread = true;
            Thread.Sleep(106);
         
          
            m_StartCount = startcount;
            m_SendCount = sendcount;
            m_sbip = sbip;
            //新开一个线程发送数据　
            m_threadStartSendMusic = new Thread(SendMusic);
            m_threadStartSendMusic.IsBackground = true;
            m_threadStartSendMusic.Start();
        }

        /// <summary>
        /// 发送音乐
        /// </summary>
        private  void SendMusic()
        {
            m_stopThread = false;
         
            int endCount = m_StartCount + m_SendCount;
            for (int i = m_StartCount; i < endCount; i++)
            {
                if (m_stopThread)
                {
                    break;
                }

             //do something
             }

      }

----------------------------------------------------------------------------------------------

２.

        /// <summary>
        /// 用来判断是否停止线程的变量
        /// </summary>
        private  volatile bool m_stopThread=false;
        private Thread m_threadStartSendMusic;

        /// <summary>
        /// 开始发送
        /// </summary>
        public void SendMusicInThread(int startcount,int sendcount,string sbip)
        {
            //若有在发送数据　停止发送
            m_stopThread = true;
            Thread.Sleep(106);
            m_stopThread = false;
           
            m_StartCount = startcount;
            m_SendCount = sendcount;
            m_sbip = sbip;
            //新开一个线程发送数据　
            m_threadStartSendMusic = new Thread(SendMusic);
            m_threadStartSendMusic.IsBackground = true;
            m_threadStartSendMusic.Start();
        }

        /// <summary>
        /// 发送音乐
        /// </summary>
        private  void SendMusic()
        {
            int endCount = m_StartCount + m_SendCount;
            for (int i = m_StartCount; i < endCount; i++)
            {
                if (m_stopThread)
                {
                    break;
                }

             //do something
             }

      }

-------------------------------------------------------------------------------------------------

 

当我多次执行SendMusicInThread（。。。）方法时　为何1不能停止当前线程　然后再开线程m_threadStartSendMusic　　

2却能把上一个线程停掉　然后再开一个线程　

就 m_stopThread　放的位置不同

而m_stopThread　我设置的是volatile　应该每次执行去判断m_stopThread的时候都是最新的值才对　为什么呢

 

 

Answer 1

你是如何调用 SendMusicInThread 这个函数的？ Thread.Sleep() 时间长点，比如 5000。

Answer 2

start方法后，线程不会马上被执行，而是等待被执行。我猜想哦，这两段代码在不同配置电脑上，会有不同结果。