Question

我有一个简单的线程，可以监视文件的更改。

UINT CFileMonitoringManager::WaitingOnChanges(LPVOID lpParam)
{
    CFileMonitoringManager *pThisClass = (CFileMonitoringManager*)lpParam;

    TCHAR szFileNameBuffer[MAX_PATH];
    DWORD dwBytes = 0;
    DWORD cbOffset = 0;
    CSubscribeTarget *pObject = NULL;
    LPOVERLAPPED lpOverlapped = NULL;    
    FILE_NOTIFY_INFORMATION *pNotifyInfo = NULL;

    while(pThisClass->m_hCompPort)
    {
        if (::GetQueuedCompletionStatus(pThisClass->m_hCompPort, &dwBytes, (LPDWORD)&pObject, &lpOverlapped, INFINITE))
        {
              pNotifyInfo = (PFILE_NOTIFY_INFORMATION)pObject->m_NotifyBuffer;
          DWORD dwBytesRead = 0;
          memset(szFileNameBuffer, 0, sizeof(TCHAR) * MAX_PATH);
          TCHAR* szFileName = 
          GetTCHAR(pNotifyInfo->FileName, pNotifyInfo->FileNameLength, szFileNameBuffer, MAX_PATH);
              //My custom code

          if(!pObject->ReadingDirectory())
              return 0;
        }
    }

    return 0;
}

我正在使用ReadDirectoryChangesW和CreateIoCompletionPort。我有情况：当我订阅D：\ TESTS \ INPUT.txt并更改D：\ TESTS \ INPUT2.txt时，我得到普通名称INPUT.txt和长度为20的那些变量

pNotifyInfo->FileName, pNotifyInfo->FileNameLength

我跳过我的特殊文件代码并重新开始等待。当我更改D：\ TESTS \ INPUT.txt（我订阅的文件）时，我进入INPUT.txtt，18进入那些变种

pNotifyInfo->FileName, pNotifyInfo->FileNameLength

怎么了？我无法理解。有几次它开始返回正常数据。请帮帮我

GetQueuedCompletionStatus返回缓冲区中的错误数据

0 个答案: