说明：  使用CRITICAL_SECTION实现，有人提出CRITICAL_SECTION不能在A线程lock，然后B线程 unlock 其实这个不是问题，msdn中的描述也只是说不安全，没说一定错误，所以就是要保证lock次数=unlock次数，就不会有问题，代码经过强度测试，表示结果正确
(To use CRITICAL_SECTION to achieve, someone asked the the CRITICAL_SECTION not A thread lock, then thread B unlock In fact, this is not a problem description msdn just not safe, did not say a certain error, it is to ensure that the lock times = unlock times, there would be no problem, correct code has been a strength test, said the results)