[Click] upstream queue

[Venky Rama]

hi - how can say a roundrobinscheduler element get information about an upstream queue? something like 
     Queue *q = (Queue*)input(j).element();
     q->getColor();
  in the downstream element does not work...
   
  for example, if the upstream queue has a new member called _color, then the scheduler needs to know if _color of the upstream queue is say red or green....
   
  thanks!
  venky
   
  ________
   
  details:
  ________
   
  i tried this in the scheduler's pull function but it gives weird numbers instead...assume the Queue class has a simple int member which stores color and which is returned by public getColor().
   
  Packet *
  RoundRobinSched::pull(int)
  {
   int n = ninputs();
   int i = _next;
   for (int j = 0; j < n; j++) {
     Queue *q = (Queue*)input(j).element();
     click_chatter("upstream queue %i has a color %i", j, q->getColor();)
     Packet *p = (_signals[i] ? input(i).pull() : 0);
     i++; 
     if (i >= n) 
       i = 0;
     if (p) {
       _next = i;
       return p;
     }
   }
   return 0;
  }
   
   

 			
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