[fio.git] / lib / zipf.h

#ifndef FIO_ZIPF_H
#define FIO_ZIPF_H

#include <inttypes.h>
#include "rand.h"

struct zipf_state {
	uint64_t nranges;
	double theta;
	double zeta2;
	double zetan;
	double pareto_pow;
	struct frand_state rand;
	unsigned long rand_off;
};

void zipf_init(struct zipf_state *zs, unsigned long nranges, double theta);
unsigned long long zipf_next(struct zipf_state *zs);

void pareto_init(struct zipf_state *zs, unsigned long nranges, double h);
unsigned long long pareto_next(struct zipf_state *zs);

#endif
Commit	Line	Data
e25839d4 JA	1	#ifndef FIO_ZIPF_H
	2	#define FIO_ZIPF_H
	3
b83da9b5	4	#include <inttypes.h>
e25839d4 JA	5	#include "rand.h"
	6
	7	struct zipf_state {
	8	uint64_t nranges;
	9	double theta;
	10	double zeta2;
	11	double zetan;
925fee33	12	double pareto_pow;
e25839d4	13	struct frand_state rand;
b2b0b753	14	unsigned long rand_off;
e25839d4 JA	15	};
	16
	17	void zipf_init(struct zipf_state *zs, unsigned long nranges, double theta);
	18	unsigned long long zipf_next(struct zipf_state *zs);
	19
925fee33 JA	20	void pareto_init(struct zipf_state *zs, unsigned long nranges, double h);
	21	unsigned long long pareto_next(struct zipf_state *zs);
	22
e25839d4	23	#endif