Tic7 Class Reference

Inheritance diagram for Tic7:

List of all members.

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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.

Public Member Functions
	Tic7 ()
virtual	~Tic7 ()
Protected Member Functions
virtual void	initialize ()
virtual void	handleMessage (cMessage *msg)
Private Attributes
double	timeout
cMessage *	timeoutEvent

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Constructor & Destructor Documentation

Tic7::Tic7 (   )

{ timeoutEvent = NULL; }

Tic7::~Tic7 (   )  [virtual]

{ cancelAndDelete(timeoutEvent); }

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Member Function Documentation

void Tic7::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 *msg = new cMessage("tictocMsg"); send(msg, "out"); scheduleAt(simTime()+timeout, timeoutEvent); } else // message arrived { // Acknowledgement received -- delete the stored message and cancel // the timeout event. ev << "Timer cancelled.\n"; cancelEvent(timeoutEvent); // Ready to send another one. cMessage *msg = new cMessage("tictocMsg"); send(msg, "out"); scheduleAt(simTime()+timeout, timeoutEvent); } }

void Tic7::initialize (   )  [protected, virtual]

Reimplemented from cModule. { // 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

double Tic7::timeout [private]

cMessage* Tic7::timeoutEvent [private]

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

• txc7.cc

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