WaitForSingleObject()返回值造成的bug

代码如下： <pre class="csharpcode">AppDataPromulgator *pThis = (AppDataPromulgator *)arg; HANDLE eventHandeArr[2] = { pThis->m_exitDistributeRealData, s_realDataTransParam.updataEvent }; while ( 1 ) { DWORD ret = ::WaitForMultipleObjects( 2, eventHandeArr, FALSE, INFINITE ); if ( WAIT_OBJECT_0 == ret ) { break; } else if ( WAIT_OBJECT_0+1 == ret ) { if (NULL == s_realDataTransParam.CurrFreq) { continue; } DWORD freqTemp = *(s_realDataTransParam.CurrFreq); float currFreq = float(FREQ_FACTOR) / float(freqTemp+1); if( currFreq < MIN_FREQ || currFreq > MAX_FREQ ) { currFreq = 0.0f; } pThis->DistributeRealData( s_realDataTransParam.pRecData, currFreq ); } } RETAILMSG( 1, (_T(" AppDataPromulgator::RealDataDistributeThread() Exit\r\n") ) ); return 0;</pre> <style type="text/css"> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }</style>

其错误原因主要如下：

当s_realDataTransParam.updataEvent 为无效值时，则WaitForMultipleObjects()既不会返回WAIT_OBJECT_0也不会返回WAIT_OBJECT_0+1，则当出现该类情况时，则会一直运行while(1)循环，而造成该线程持续占用CPU而导致应用程序启动过慢或者根本无法启动

来源：oschina

链接：https://my.oschina.net/u/180589/blog/160126

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