actp-adc.cc

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) Xerox Corporation 1997. All rights reserved.
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 * under the terms of the GNU General Public License as published by the
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
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 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/adc/actp-adc.cc,v 1.6 2005/08/26 05:05:27 tomh Exp $";
#endif


//Acceptance region Tangent at Peak Admission Control

#include "adc.h"
#include <stdlib.h>
#include <math.h>

class ACTP_ADC : public ADC {
public:
    ACTP_ADC();
    void teardown_action(int,double,int);
    void rej_action(int,double,int);
protected:
    int admit_flow(int,double,int);
    int rejected_; 
    double s_;
    double sump_;
};

ACTP_ADC::ACTP_ADC() : rejected_(0), sump_(0)
{
    bind("s_", &s_);
    type_ = new char[5];
    strcpy(type_, "ACTP");
}



int ACTP_ADC::admit_flow(int cl,double r,int b)
{
    //get peak rate this class of flow
    double p=peak_rate(cl,r,b);

    if (backoff_) {
        if (rejected_)
            return 0;
    }
    
    //fprintf (stderr,"%f %f %f\n",sump_*(1-exp(-p*s_)),exp(-p*s_)*est_[cl]->avload(),est_[cl]->avload());
    if (sump_*(1-exp(-p*s_))+exp(-p*s_)*est_[cl]->avload() <= bandwidth_) {
        sump_+= p;
        if (dobump_) {
            est_[cl]->change_avload(p);
        }
        return 1;
    }
    else {
        rejected_=1;
        return 0;
    }
}


void ACTP_ADC::rej_action(int cl,double r,int b)
{
    double p=peak_rate(cl,r,b);
    sump_ -= p;
}


void ACTP_ADC::teardown_action(int cl,double r,int b)
{
    rejected_=0;
    double p=peak_rate(cl,r,b);
    sump_ -= p;
}

static class ACTP_ADCClass : public TclClass {
public:
    ACTP_ADCClass() : TclClass("ADC/ACTP") {}
    TclObject* create(int,const char*const*) {
        return (new ACTP_ADC());
    }
}class_actp_adc;

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