drop-tail.h

多信道多接口无线mesh网络MAC协议MMAC的ns2仿真源码

/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1994 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the Computer Systems
 *	Engineering Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/queue/drop-tail.h,v 1.17 2002/01/01 04:26:10 sfloyd Exp $ (LBL)
 */

#ifndef ns_drop_tail_h
#define ns_drop_tail_h

#include <string.h>
#include "queue.h"
#include "config.h"

/*
 * A bounded, drop-tail queue
 */
class DropTail : public Queue {
  public:
	DropTail() { 
		q_ = new PacketQueue; 
		pq_ = q_;
		bind_bool("drop_front_", &drop_front_);
		bind_bool("summarystats_", &summarystats);
		bind_bool("queue_in_bytes_", &qib_);  // boolean: q in bytes?
		bind("mean_pktsize_", &mean_pktsize_);
		//		_RENAMED("drop-front_", "drop_front_");
	}
	~DropTail() {
		delete q_;
	}
  protected:
	void reset();
	int command(int argc, const char*const* argv); 
	void enque(Packet*);
	Packet* deque();
//JUNGMIN
	int BuildQState(int*, int);
	void ReturnPacket(Packet* p);
//end of JUNGMIN
	PacketQueue *q_;	/* underlying FIFO queue */
	int drop_front_;	/* drop-from-front (rather than from tail) */
	int summarystats;
	void print_summarystats();
	int qib_;       	/* bool: queue measured in bytes? */
	int mean_pktsize_;	/* configured mean packet size in bytes */
};

#endif