tagtable.h

ns2.31下的UWB（Ultra WideBand）实现

/*
 * Copyright (c) 2004, Stony Brook University
 * Contributors: Ashish Raniwala
 * All rights reserved.
 *
 * See copyright notice included in the distribution for details
 *
 */

// raniwala: added for manual routing in wireless scenario
//
#ifndef tag_table_h_
#define tag_table_h_

#include "config.h"
#include "scheduler.h"
#include "queue.h"

#ifndef uint
typedef unsigned int uint;
#endif // !uint

/* NOTE: we depend on bzero setting the booleans to ``false''
   but if false != 0, so many things are screwed up, I don't
   know what to say... */

class tag_table_ent {
public:
  tag_table_ent() { bzero(this, sizeof(tag_table_ent));}
  nsaddr_t     dst;     // destination
  int          tag;     // tag
  int	     count;     // Number of times this tag is in use
};

// AddEntry adds an entry to the routing table with metric ent->metric+em.
//   You get to free the goods.
//
// GetEntry gets the entry for an address.

class TagTable {
  public:
    TagTable();
    void AddTag(const tag_table_ent &ent);
    tag_table_ent *GetTag(nsaddr_t dest);
    void IncreaseTagCount(int tag);
    void DecreaseTagCount(int tag);
    void ResetTagCount(int tag);

    // for looping over elements
    int RemainingLoop();
    void InitLoop();
    tag_table_ent *NextLoop();

  private:
    tag_table_ent *_rtab;
    int         _maxelts;

    // for looping over elements
    int         _elts;
    int         _ctr;
};
    
#endif