[ns] EDCF CODE QUESTION

[=?big5?q?=20=20=20?=]

void
DeferTimer_802_11e::pause()
{
 Scheduler &s = Scheduler::instance();
 for(int pri = 0; pri < MAX_PRI; pri++ ){ 
  if(defer_[pri] && busy_){
   double st = s.clock();            //now
   double rt = stime_[pri];   // Start-Time of defer
   ~~~~~~~~~~~~~~~~~~~~~~
  What is the meaning and perpose of stime_[PRI] ?  I am confused with this and totally loss. Hope you can give me your hand!    
   
   
   double sr = st - rt;
   assert(busy_ && ! paused_);
   if(rtime_[pri] - sr >= 0.0) {
    rtime_[pri] -= sr;
    assert(rtime_[pri] >= 0.0); 
 } else{
 if(rtime_[pri] + round - sr >= 0.0){ 
     rtime_[pri] = 0;
    } else {
     cout<<"ERROR in DeferTimer::pause(), rtime_["<<pri<<"]  is "<<rtime_[pri]<<", sr:"<<sr<<"  \n";
     exit(0);
    }
   }
  }
 }
 s.cancel(&intr);
 paused_ = 1;
}



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