rxmit_queue.h
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1997 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
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * 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
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- /* Ported from CMU/Monarch's code*/
- /* -*- c++ -*-
- rexmit_queue.h
- $Id: rxmit_queue.h,v 1.4 2002/05/06 22:23:15 difa Exp $
- */
- #ifndef imep_rexmit_queue_h
- #define imep_rexmit_queue_h
- #include <packet.h>
- #include "lib/bsd-list.h"
- typedef double Time;
- struct rexent {
- double rexmit_at;
- int rexmits_left;
- Packet *p;
- LIST_ENTRY(struct rexent) next;
- };
- LIST_HEAD(rexent_head, rexent);
- class ReXmitQ;
- class ReXmitQIter {
- friend class ReXmitQ;
-
- public:
- inline Packet * next() {
- if (0 == iter) return 0;
- struct rexent *t = iter;
- iter = iter->next.le_next;
- return t->p;
- }
-
- private:
- ReXmitQIter(rexent *r) : iter(r) {};
- struct rexent * iter;
- };
- class ReXmitQ {
- public:
- ReXmitQ();
-
- void insert(Time rxat, Packet *p, int num_rexmits);
- void peekHead(Time *rxat, Packet **pp, int *rexmits_left);
- void removeHead();
- void remove(Packet *p);
- inline ReXmitQIter iter() {
- return ReXmitQIter(head.lh_first);
- }
- private:
- rexent_head head;
- };
- #endif