IOCP getqueuedcompletionstatus() 함수에서 키값 질문입니다...

bool
Worker::Run()
{
  DWORD bytesTransferred = 0;
  IO_CONTEXT *context = NULL;
  Client *client = NULL;
  BOOL ret = GetQueuedCompletionStatus(this->m_completionPort, &bytesTransferred, (PULONG_PTR)&client, (LPWSAOVERLAPPED*)&context, 0);
 
  if (!(ret == FALSE && GetLastError() == WAIT_TIMEOUT))
  {
    if (context == NULL)
    {
      Log::GetInstance().Write("Cannot get data from Completion port : \"%s\"",
        Util::SystemErrorToString(GetLastError()).c_str());
 
      return true;
 
    }
 
    AutoLocker autoLocker(client->GetLocker());
    bool closed = false;
 
    if (ret == FALSE)
    {
      DWORD flags;
 
      if (WSAGetOverlappedResult(client->GetSocket(), context, &bytesTransferred, FALSE, &flags) == FALSE)
      {
        if (WSAGetLastError() != NO_ERROR)
        {
          //이곳에서는 상대방이 closesocket을 하여 전송을 요청한 컨텍스트를 더이상
          //전송 할 수 없을 때 발생한다. 전송 요청을 한 후 완료되지 않았을 때 closesocket을
          //했다면 전송 요청한 수 만큼 발생한다.
 
         /* Log::GetInstance().Write("Network name is no longer available. Closing client pended (IP : %s, Port : %hu, Socket : %u, Context : %p)",
            inet_ntoa(client->GetSockAddr().sin_addr),
            ntohs(client->GetSockAddr().sin_port),
            client->GetSocket(),
            context);*/
 
          closed = true;
 
        }
 
      }
 
    }
    else if (bytesTransferred == 0)
    {
      Log::GetInstance().Write("Client connection closed. Deleting client pended (IP : %s, Port : %hu, Socket : %u)",
        inet_ntoa(client->GetSockAddr().sin_addr),
        ntohs(client->GetSockAddr().sin_port),
        client->GetSocket());
 
      closed = true;
 
    }
 
    if (!client->ProcessContext(context->op, context, bytesTransferred, closed))
    {
      Log::GetInstance().Write("Cannot process context (IP : %s, Port : %hu, Socket : %u)",
        inet_ntoa(client->GetSockAddr().sin_addr),
        ntohs(client->GetSockAddr().sin_port),
        client->GetSocket());
 
      closed = true;
 
    }
 
    if (closed)
    {
      client->SetToBeClosed();
 
    }
 
  }
 
  this->m_server->GetClientProcessor().CollectDeadClient();
  this->m_server->GetClientProcessor().ProcessClientTasks();
 
  return true;
 
}