// -*- mode: c++; c-basic-offset: 4 -*-#ifndef CLICK_PI_HH#define CLICK_PI_HH#include <click/element.hh>#include <click/ewma64.hh>#include <click/timer.hh>CLICK_DECLSclass Storage;class PI : public Element { public:    PI();    ~PI();    const char *class_name() const		{ return "PI"; }    const char *processing() const		{ return "a/ah"; }    int queue_size() const;    const DirectEWMA64 &average_queue_size() const { return _size; }    int drops() const				{ return _drops; }    void notify_noutputs(int);    int configure(Vector<String> &, ErrorHandler *);    int check_params(double, double, double, unsigned, unsigned, ErrorHandler *) const ;    int initialize(ErrorHandler *);    void cleanup(CleanupStage);    void take_state(Element *, ErrorHandler *);    void configuration(Vector<String> &) const;    bool can_live_reconfigure() const		{ return true; }    int live_reconfigure(Vector<String> &, ErrorHandler *);    void add_handlers();    bool should_drop();    void handle_drop(Packet *);    void push(int port, Packet *);    Packet *pull(int port);    void run_timer();  protected:		Timer _timer;    Storage *_queue1;    Vector<Storage *> _queues;    // Queue sizes are shifted by this much.    static const unsigned QUEUE_SCALE = 10;    DirectEWMA64 _size;    int _random_value;    int _last_jiffies;    int _drops;	double _a, _b, _w, _p; 	unsigned _target_q, _old_q;    Vector<Element *> _queue_elements;    static String read_stats(Element *, void *);    static String read_queues(Element *, void *);    static String read_parameter(Element *, void *);    static const int MAX_RAND=2147483647;};CLICK_ENDDECLS#endif