// Header file for qMgr class, which manages a set of queues.
// links in the system.

#ifndef QMGR_H
#define QMGR_H

#include "wunet.h"
#include "listset.h"
#include "mheap.h"
#include "lnkTbl.h"
#include "pktStore.h"

class qMgr {
public:
		qMgr(int,int,int,pktStore*,lnkTbl*);
		~qMgr();

	bool	enq(int,int,uint32_t); 	// add packet on link queue
	int	deq(int);		// deq packet from given link
	int	nextReady(uint32_t);	// index of next ready link
	int	qlenPkts(int);
	int	qlenBytes(int);
private:
	int	nL;			// number of links
	int	nP;			// number of packets that can be queued
	int	qL;			// maximum queue length (in packets)

	listset	*queues;		// collection of lists
	mheap	*active;		// active links, ordered by due time
	mheap	*vactive;		// virtually active links
	int	*npq;			// npq[q] = number of packets in q
	int	*nbq;			// nbq[q] = number of bytes in q

	pktStore *ps;			// pointer to packet store object
	lnkTbl *lt;			// pointer to link table object
};

inline int qMgr::qlenPkts(int q)  { return npq[q]; }
inline int qMgr::qlenBytes(int q) { return nbq[q]; }

#endif