进程外渲染

如果两个线程拥有任何关系类型的窗口,那么它们很容易耦合。

这样做的有效结果是,您的IPC调用在等待应答时无法阻塞-您的IPC读取始终需要使用 MsgWaitForMultipleObjects 以便您可以在等待指示完成的IPC消息时处理来自其他进程/线程的窗口消息。

您要做的是将当前对WaitForMultipleObjects的调用替换为MSGWaitForMultipleObjects。当它返回时,检查返回值。如果nCount是等待接收信号的IPC句柄数:

// Pump messages while waiting on 0 or more handles.
for(;;)
{
   while(PeekMessage(&msg,0,0,0,PM_REMOVE))
   {
     TranslateMessage(&msg);
     DispatchMessage(&msg);
   }

   DWORD ret = MsgWaitForMultipleObjects(nCount,pHandles,FALSE,dwTimeout,QS_ALLEVENTS);
   if(ret >= WAIT_OBJECT_0 && ret < (WAIT_OBJECT_0 + nCount))
   {
     // one of the handles was signalled.
     return ret;
   }
   else if(ret == WAIT_OBJECT_0 + nCount)
   { 
     // The wait was aborted because there is at least one message, 
     // go back to pumping messages
     continue;
   }
   else
   {
     // test for WAIT_OBJECT_ABANDONED_0, WAIT_TIMEOUT etc. as appropriate
   }
}