fsm.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/* fsm.h
 * Copyright (C) 1999 by USC/ISI
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms 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
 * Southern California, Information Sciences Institute.  The name of the
 * University may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 * 
 * Contributed by Polly Huang (USC/ISI), http://www-scf.usc.edu/~bhuang
 * 
 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/common/fsm.h,v 1.3 1999/09/08 20:56:50 heideman Exp $ (LBL)
 */

#include "scheduler.h"

#define RTT 1
#define TIMEOUT 2

class FSMState {
protected:
        friend class FSM;
        void number_all();
        void print_all(int level);
        void print_all_stats(int desired_pkts, int pkts = 0,
                             int rtts = 0, int timeouts = 0, 
                             int ps = 0, int qs = 0,
                             int num_states = 0,
                             int num_state_names = 0);
        void reset_all_processed();
        bool processed() { return print_i_ < 0; }
public:
        FSMState() : print_i_(0) {};
        /* number of packets in this batch of transmission */
        int batch_size_; 
        /* time to make transition from previous state to this one
        * (either RTT or TIMEOUT) */
        int transition_[17];
        /* next states if dropping packet #1-16, 0 for none */
        FSMState* drop_[17];
        int print_i_;  // printing index (processed if negative)
};


class FSM : public TclObject {
public:
        FSM() {};
        inline FSMState* start_state() {        // starting state
                return (start_state_);
        }
        static FSM& instance() {
                return (*instance_);            // general access to scheduler
        }
        static void print_FSM(FSMState* state);
        static void print_FSM_stats(FSMState* state, int n);
protected:
        FSMState* start_state_;
        static FSM* instance_;
};



class TahoeAckFSM : public FSM {
public:
        TahoeAckFSM();
        inline FSMState* start_state() {        // starting state
                return (start_state_);
        }
        static TahoeAckFSM& instance() {
                return (*instance_);           // general access to TahoeAckFSM
        }
protected:
        FSMState* start_state_;
        static TahoeAckFSM* instance_;

};

class RenoAckFSM : public FSM {
public:
        RenoAckFSM();
        inline FSMState* start_state() {        // starting state
                return (start_state_);
        }
        static RenoAckFSM& instance() {
                return (*instance_);           // general access to TahoeAckFSM
        }
protected:
        FSMState* start_state_;
        static RenoAckFSM* instance_;
};


class TahoeDelAckFSM : public FSM {
public:
        TahoeDelAckFSM();
        inline FSMState* start_state() {        // starting state
                return (start_state_);
        }
        static TahoeDelAckFSM& instance() {
                return (*instance_);           // general access to TahoeAckFSM
        }
protected:
        FSMState* start_state_;
        static TahoeDelAckFSM* instance_;
};

class RenoDelAckFSM : public FSM {
public:
        RenoDelAckFSM();
        inline FSMState* start_state() {        // starting state
                return (start_state_);
        }
        static RenoDelAckFSM& instance() {
                return (*instance_);           // general access to TahoeAckFSM
        }
protected:
        FSMState* start_state_;
        static RenoDelAckFSM* instance_;
};

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