//-------------------------------------------------------------
// file: fifo1.h
//        (part of Fifo1 - an OMNeT++ demo simulation)
//-------------------------------------------------------------

#ifndef __FIFO_H
#define __FIFO_H

#include <omnetpp.h>

// FF2AbstractFifo : abstract base class for single-server queues
class FF2AbstractFifo : public cSimpleModule
{
  public:
    Module_Class_Members(FF2AbstractFifo,cSimpleModule,16384);

    cMessage *msgServiced1;
    cMessage *msgServiced2;
    cMessage *endServiceMsg1;
    cMessage *endServiceMsg2;
    cMessage *recordHistogram;
    cQueue queue;
	cLongHistogram hist;

    virtual void activity();
    virtual void finish();

    // hook functions to (re)define behaviour
    virtual void arrival(cMessage *msg) {}
    virtual simtime_t startService(cMessage *msg) = 0;
    virtual void endService(cMessage *msg) = 0;
};

// FF2PacketFifo : double-server queue with given service time
class FF2PacketFifo : public FF2AbstractFifo
{
  public:
    Module_Class_Members(FF2PacketFifo,FF2AbstractFifo,16384);

    virtual simtime_t startService(cMessage *msg);
    virtual void endService(cMessage *msg);
};

#endif