Tic8 Class Reference

Inheritance diagram for Tic8:

List of all members.

Public Member Functions
	Tic8 ()
virtual	~Tic8 ()
Protected Member Functions
virtual void	initialize ()
virtual void	handleMessage (cMessage *msg)
Private Attributes
simtime_t	timeout
cMessage *	timeoutEvent

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Detailed Description

Let us take a step back, and remove random delaying from the code. We'll leave in, however, losing the packet with a small probability. And, we'll we do something very common in telecommunication networks: if the packet doesn't arrive within a certain period, we'll assume it was lost and create another one. The timeout will be handled using (what else?) a self-message.

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Constructor & Destructor Documentation

Tic8::Tic8

(

)

{
    timeoutEvent = NULL;
}

Tic8::~Tic8

(

)

[virtual]

{
    cancelAndDelete(timeoutEvent);
}

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Member Function Documentation

void Tic8::handleMessage

(

cMessage *

msg

)

[protected, virtual]

Reimplemented from cSimpleModule.

{
    if (msg==timeoutEvent)
    {
        // If we receive the timeout event, that means the packet hasn't
        // arrived in time and we have to re-send it.
        EV << "Timeout expired, resending message and restarting timer\n";
        cMessage *newMsg = new cMessage("tictocMsg");
        send(newMsg, "out");
        scheduleAt(simTime()+timeout, timeoutEvent);
    }
    else // message arrived
    {
        // Acknowledgement received -- delete the received message and cancel
        // the timeout event.
        EV << "Timer cancelled.\n";
        cancelEvent(timeoutEvent);
        delete msg;

        // Ready to send another one.
        cMessage *newMsg = new cMessage("tictocMsg");
        send(newMsg, "out");
        scheduleAt(simTime()+timeout, timeoutEvent);
    }
}

void Tic8::initialize

(

)

[protected, virtual]

Reimplemented from cComponent.

{
    // Initialize variables.
    timeout = 1.0;
    timeoutEvent = new cMessage("timeoutEvent");

    // Generate and send initial message.
    EV << "Sending initial message\n";
    cMessage *msg = new cMessage("tictocMsg");
    send(msg, "out");
    scheduleAt(simTime()+timeout, timeoutEvent);
}

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Member Data Documentation

simtime_t Tic8::timeout [private]

Referenced by handleMessage(), and initialize().

cMessage* Tic8::timeoutEvent [private]

Referenced by handleMessage(), initialize(), Tic8(), and ~Tic8().

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The documentation for this class was generated from the following file:

• txc8.cc