/* * requesttable.cc * Copyright (C) 2000 by the University of Southern California * $Id: requesttable.cc,v 1.4 2005/08/25 18:58:05 johnh Exp $ * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. * * * The copyright of this module includes the following * linking-with-specific-other-licenses addition: * * In addition, as a special exception, the copyright holders of * this module give you permission to combine (via static or * dynamic linking) this module with free software programs or * libraries that are released under the GNU LGPL and with code * included in the standard release of ns-2 under the Apache 2.0 * license or under otherwise-compatible licenses with advertising * requirements (or modified versions of such code, with unchanged * license).  You may copy and distribute such a system following the * terms of the GNU GPL for this module and the licenses of the * other code concerned, provided that you include the source code of * that other code when and as the GNU GPL requires distribution of * source code. * * Note that people who make modified versions of this module * are not obligated to grant this special exception for their * modified versions; it is their choice whether to do so.  The GNU * General Public License gives permission to release a modified * version without this exception; this exception also makes it * possible to release a modified version which carries forward this * exception. * *///// Other copyrights might apply to parts of this software and are so// noted when applicable.//// Ported from CMU/Monarch's code, appropriate copyright applies.  /* requesttable.h   implement a table to keep track of the most current request   number we've heard from a node in terms of that node's id*/#include "path.h"#include "constants.h"#include "requesttable.h"RequestTable::RequestTable(int s): size(s){  table = new Entry[size];  size = size;  ptr = 0;}RequestTable::~RequestTable(){  delete[] table;}intRequestTable::find(const ID& net_id, const ID& MAC_id) const{  for (int c = 0 ; c < size ; c++)	  if (table[c].net_id == net_id || table[c].MAC_id == MAC_id)		  return c;  return size;}intRequestTable::get(const ID& id) const{  int existing_entry = find(id, id);  if (existing_entry >= size)        {      return 0;    }  return table[existing_entry].req_num;}Entry*RequestTable::getEntry(const ID& id){  int existing_entry = find(id, id);  if (existing_entry >= size)        {      table[ptr].MAC_id = ::invalid_addr;      table[ptr].net_id = id;      table[ptr].req_num = 0;      table[ptr].last_arp = 0.0;      table[ptr].rt_reqs_outstanding = 0;      table[ptr].last_rt_req = -(rt_rq_period + 1.0);      existing_entry = ptr;      ptr = (ptr+1)%size;    }  return &(table[existing_entry]);}voidRequestTable::insert(const ID& net_id, int req_num){  insert(net_id,::invalid_addr,req_num);}voidRequestTable::insert(const ID& net_id, const ID& MAC_id, int req_num){  int existing_entry = find(net_id, MAC_id);  if (existing_entry < size)    {      if (table[existing_entry].MAC_id == ::invalid_addr)	table[existing_entry].MAC_id = MAC_id; // handle creations by getEntry      table[existing_entry].req_num = req_num;      return;    }  // otherwise add it in  table[ptr].MAC_id = MAC_id;  table[ptr].net_id = net_id;  table[ptr].req_num = req_num;  table[ptr].last_arp = 0.0;  table[ptr].rt_reqs_outstanding = 0;  table[ptr].last_rt_req = -(rt_rq_period + 1.0);  ptr = (ptr+1)%size;}