root/src/timed_circle.h

#ifndef _TIMED_CIRCLE_H_
#define _TIMED_CIRCLE_H_

/* store hits for a given second in here.
 * some bits of the logbits struct aren't used in the circle but
 * it's better than making an entirely new struct */
typedef struct logbits HIT;

class Timed_Circle : public Circle
{
public:

        int create(unsigned int size);
        int insert(struct logbits lb);
        int walk(struct logbits **lb);

        void updatestats(void);
        time_t oldest(void);

        double getreqcount(void) { return reqcount; }
        double getbytecount(void) { return bytecount; }
        double getsummary(int r_c) { return rc_summary[r_c]; }

private:
        int initbuckets(const unsigned int from, const unsigned int to);
        void resetbucketstats(const unsigned int r);

        void garbagecollection(void);

        double reqcount, bytecount;
        double rc_summary[6];

        unsigned int bucketsize; /* how many buckets (seconds) ? */
        unsigned int bucketpos; /* which bucket are we using now? */

        /* the timed_circle_struct is a set of buckets; each bucket contains
         * data about hits for a given second. Each hit is stored in a
         * HIT array inside the relevant bucket */
        struct timed_circle_struct
        {
                time_t time; /* second this bucket represents */

                /* stats for the HITs array */
                double reqcount, bytecount;
                double rc_summary[6];

                unsigned int hitsize; /* how big is the array for hits? */
                unsigned int hitpos; /* how far along hits array we are */
                HIT *hits; /* hits for this second go into array */

        } *tab;

        /* for walk() */
        unsigned int walk_bucketpos;
        unsigned int walk_hitpos;

};

#endif