WINCE下消息队列的简单用法----MsgQueue

相关网帖

1、在WINCE下的点对点消息队列CreateMsgQueue----http://www.360doc.com/content/12/0115/13/992979_179513334.shtml

2、WinCE下消息队列用法----http://blog.youkuaiyun.com/lan120576664/article/details/4576743

//============================================================================

HANDLE   hReadMsgQueue;
HANDLE   hWriteMsgQueue;

const TCHAR szevtWriteComMsgQueue[] = TEXT("WriteComMsgQueue");  //写消息队列

const TCHAR szevtReadComMsgQueue[] = TEXT("ReadComMsgQueue");   //读消息对列

//==============================================================================================================================================================

void  InitCommMsgQueue(void) //2009--9--29  xqh  初始化系统用到的消息队列
{

 

       MSGQUEUEOPTIONS  options  =  {0};

  
      options.dwSize  =  sizeof(MSGQUEUEOPTIONS);  
      options.dwFlags  =  0;  

      //options.dwMaxMessages  =  QUEUE_ENTRIES;  
      //options.cbMaxMessage  =  sizeof(POWER_BROADCAST)+MAX_NAMELEN;  

 options.dwMaxMessages=1;  
 options.cbMaxMessage=10;  

      options.bReadAccess=TRUE;  

     //options.bReadAccess=FALSE;

      hReadMsgQueue=CreateMsgQueue(szevtWriteComMsgQueue,&options);  //2009--9--29  XQH  读写的消息句柄是不相同的！！！

   if(hReadMsgQueue==NULL)
    RETAILMSG(1,(TEXT("[BSP]++++1111::InitCommMsgQueue(  )----in failure/r/n")));
   else
    RETAILMSG(1,(TEXT("[BSP]++++1111::InitCommMsgQueue(  )----in success/r/n")));

 

  RETAILMSG(1,(TEXT("[BSP]++++1111-1::InitCommMsgQueue(  )----the hReadMsgQueue is 0x%x/r/n"),hReadMsgQueue));

//--------------------------------------------------------------------------------
   
    //MSGQUEUEOPTIONS  options  =  {0};

  
      options.dwSize  =  sizeof(MSGQUEUEOPTIONS);  
      options.dwFlags  =  0;  

      //options.dwMaxMessages  =  QUEUE_ENTRIES;  
      //options.cbMaxMessage  =  sizeof(POWER_BROADCAST)+MAX_NAMELEN;  

 options.dwMaxMessages=1;  
 options.cbMaxMessage=10;  

     // options.bReadAccess=TRUE;  

     options.bReadAccess=FALSE;

 

   hWriteMsgQueue=CreateMsgQueue(szevtReadComMsgQueue,&options);//2009--9--29  XQH  读写的消息句柄是不相同的！！！

      if(hWriteMsgQueue==NULL)
          RETAILMSG(1,(TEXT("[BSP]++++2222::InitCommMsgQueue(  )----in failure/r/n")));
   else
    RETAILMSG(1,(TEXT("[BSP]++++2222::InitCommMsgQueue(  )----in success/r/n")));

 

 RETAILMSG(1,(TEXT("[BSP]++++2222-1::InitCommMsgQueue(  )----the hWriteMsgQueue is 0x%x/r/n"),hWriteMsgQueue));

 

}

void   WriteMsgQueue(void)
{

int  i;
BYTE   tempByte[10];

for(i=0;i<10;i++)
{
   tempByte[i]=0x30+i;
}

DWORD   dwTimeout=INFINITE;
//DWORD   dwFlags=MSGQUEUE_MSGALERT ;  //警告消息

DWORD   dwFlags=2;

BOOL   bRet;

if(hReadMsgQueue==NULL)
   RETAILMSG(1,(TEXT("[BSP]++++WriteMsgQueue(  )----the hReadMsgQueue is NULL/r/n")));

if(hWriteMsgQueue==NULL)
   RETAILMSG(1,(TEXT("[BSP]++++WriteMsgQueue(  )----the hWriteMsgQueue is NULL/r/n")));

 

 // bRet=WriteMsgQueue(hReadMsgQueue, tempByte,10,dwTimeout,dwFlags);

 bRet=WriteMsgQueue(hWriteMsgQueue, tempByte,10,dwTimeout,dwFlags);

 

DWORD  dwError;
dwError=GetLastError( );  //句柄无效？？？

  RETAILMSG(1,(TEXT("[BSP]++++WriteMsgQueue(  )----the dwError is 0x%x/r/n"),dwError));

  if(bRet)
     RETAILMSG(1,(TEXT("[BSP]++++WriteMsgQueue(  )----in success/r/n")));
  else
     RETAILMSG(1,(TEXT("[BSP]++++WriteMsgQueue(  )----in failure/r/n")));

}

DWORD WaitMsgQueueThread(LPVOID lparam)
{

int i;

unsigned long nRead = 0, flags = 0, res = 0;

BYTE   ByteBuf[10];

 RETAILMSG(1,(TEXT("[BSP]++++WaitMsgQueueThread(  )----Running/r/n")));

  while(1)
  {
   
    DWORD dwRes = WaitForSingleObject(hReadMsgQueue,INFINITE);
  
    //  DWORD dwRes = WaitForSingleObject(hWriteMsgQueue,INFINITE);

     if(dwRes==WAIT_OBJECT_0)
     {

      RETAILMSG(1,(TEXT("[BSP]++++WaitMsgQueueThread(  )----/r/n")));

      memset(&ByteBuf,  0,  10);
       
      if (ReadMsgQueue(hReadMsgQueue, &ByteBuf, 10, &nRead, INFINITE, &flags))
     {

        for(i=0;i<nRead;i++)
  {
          RETAILMSG(1,(TEXT("[BSP]++++WaitMsgQueueThread(  )----the index is %d,the data is 0x%x/r/n"),i,ByteBuf[i]));
  }

   }

  }// if(dwRes==WAIT_OBJECT_0)

  }//while(1)

 

  return  0;
}

 

//=========================================================================================================

备注::

1>忘了说明一点，上面的代码只是在BSP里面的代码，要让其成功跑起来还要结合上层的应用程序；在上层的应用程序里面去对应打开读/写的消息队列

2>驱动层的读队列只能读，驱动层的写队列只能写；应用层的读队列只能读，应用层的读队列只能读。驱动层的读消息队列对应应用层的写消息队列，驱动层的写消息队列对应应用层的读消息队列，他们使用同样的名称字符串！！！

3>应用层跟驱动层去创建同一个名称的消息队列，确保了消息队列的一致性。应用层跟驱动层对同一个消息队列的访问只能有一种属性，要不单读，要不单写，不能同时有可读可写的属性！！！