d209.bmp.txt

Visual C++通信编程工程实例精解(附盘)

if(m_nMode==MODE_COMMAND) return -4;
if(m_nMode !=MODE_DATA) retum -1;
int nRet;
DWORD dwTimeAfter;
DWORD dwTimeUsed;
DWORD dwTimeBefore;
for(DWORD ~O;kdwCount;i++)
{
dwTimeBefore=GetTickCount0;
                       if( ! m_pQueue->Get《PB YTE)(lpstrRead+i),nTimeOut》
          {
                  //TRACE("Read2 Timeout  %ld \n",nTimeOut);
nRet=-2;//超时
                  goto Exit;
dwTimeAfter=GetTickCount0;
dwTimeUsed=dwTimeAfter-dwTimeBefore;
//断线
if(m_nMode==MODE_COMMAND)
 {
nRet=-3;
         goto Exit;
 }
    if(dwTimeUsed>nTmeOut)
    {
    if(i<dwCount)
    {
    nRet=-2;//TimeOut
    goto Exit;
    )
    else
    {
    nRet=l;
    goto Exit;
    )
    l
    ／／计算剩下的时间
    nTimeOut-=dwTimeUsed;
  }
  nRet=l;
Exit: