#include <DropTailQueue.h>

Inheritance diagram for DropTailQueue:

Protected Member Functions
virtual void	initialize ()
virtual bool	enqueue (cMessage *msg)
virtual cMessage *	dequeue ()
virtual void	sendOut (cMessage *msg)
Protected Attributes
int	frameCapacity
cQueue	queue
cGate *	outGate
cOutVector	qlenVec
cOutVector	dropVec

Detailed Description

Drop-front queue. See NED for more info.

Definition at line 28 of file DropTailQueue.h.

Member Function Documentation

cMessage * DropTailQueue::dequeue ( ) [protected, virtual]

Redefined from PassiveQueueBase.

Implements PassiveQueueBase.

Definition at line 56 of file DropTailQueue.cc.

{
    if (queue.empty())
        return NULL;

   cMessage *pk = (cMessage *)queue.pop();

    // statistics
    qlenVec.record(queue.length());

    return pk;
}

bool DropTailQueue::enqueue ( cMessage * msg ) [protected, virtual]

Redefined from PassiveQueueBase.

Implements PassiveQueueBase.

Definition at line 39 of file DropTailQueue.cc.

{
    if (frameCapacity && queue.length() >= frameCapacity)
    {
        EV << "Queue full, dropping packet.\n";
        delete msg;
        dropVec.record(1);
        return true;
    }
    else
    {
        queue.insert(msg);
        qlenVec.record(queue.length());
        return false;
    }
}

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

Reimplemented from PassiveQueueBase.

Definition at line 25 of file DropTailQueue.cc.

{
    PassiveQueueBase::initialize();
    queue.setName("l2queue");

    qlenVec.setName("queue length");
    dropVec.setName("drops");

    outGate = gate("out");

    // configuration
    frameCapacity = par("frameCapacity");
}