scheduler-group.h

obs网络试验平台

/* Copyright (c) University of Maryland, Baltimore County, 2003.
 * Original Authors: Ramakrishna Shenai, Sunil Gowda and Krishna Sivalingam.
 *
 * This software is developed at the University of Maryland, Baltimore County under
 * grants from Cisco Systems Inc and the University of Maryland, Baltimore County.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation in source and binary forms for non-commercial purposes
 * and without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both the copyright notice and
 * this permission notice appear in supporting documentation. and that
 * any documentation, advertising materials, and other materials related
 * to such distribution and use acknowledge that the software was
 * developed by the University of Maryland, Baltimore County.  The name of
 * the University may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * Copyright (C) 2000-2003 Washington State University. All rights reserved.
 * This software was originally developed at Alcatel USA and subsequently modified
 * at Washington State University, Pullman, WA  through research work which was
 * supported by Alcatel USA, Inc and Cisco Systems Inc.

 * The  following notice is in adherence to the Washington State University
 * copyright policy follows.
 *
 * License is granted to copy, to use, and to make and to use derivative
 * works for research and evaluation purposes, provided that Washington
 * State University is acknowledged in all documentation pertaining to any such
 * copy or derivative work. Washington State University grants no other
 * licenses expressed or implied. The Washington State University name
 * should not be used in any advertising without its written permission.
 *
 * WASHINGTON STATE UNIVERSITY MAKES NO REPRESENTATIONS CONCERNING EITHER
 * THE MERCHANTABILITY OF THIS SOFTWARE OR THE SUITABILITY OF THIS SOFTWARE
 * FOR ANY PARTICULAR PURPOSE.  The software is provided "as is"
 *  without express or implied warranty of any kind. These notices must
 * be retained in any copies of any part of this software.
 */

#ifndef _scheduler_group_h
#define _scheduler_group_h

using namespace std;

#include <cassert>
#include <cstdlib>
#include <cstring>
#include <iostream>

#include "lauc-scheduler.h"

class LaucScheduler;

/* Scheduler group maintains a list of schedulers on a
 * one per link basis. (The default scheduler maintained is the
 * LaucScheduler)
 */
class Scheduler_group
{
    public:
    // default constructor
    Scheduler_group();
    // destructor
    ~Scheduler_group();
    // install the LaucScheduler at the specified slot
    void install( LaucScheduler *obj, u_int slot );
    // install LaucScheduler at the next available slot
    void install( LaucScheduler *obj );
    // return the LaucScheduler specified by the slot number or NULL
    LaucScheduler* getObject( u_int slot );
    // search for a LauScheduler based upon its dest-node-id
    LaucScheduler* search( u_int dest_id );

    // diagnostic method
    void printInfo();

    protected:
    // the slot list
    LaucScheduler **slot_;
    // represents the current number of slots
    u_int currsize_;
    // add new slots
    void add_slots( u_int nslots );
    // get the next available slot. if the no slots
    // are available then add new slots and return
    // a new slot.
    u_int getNext();

    // default size by which the group list grows.
    static const u_int default_size = 10;
};

#endif