[fio.git] / lib / lfsr.h

#ifndef FIO_LFSR_H
#define FIO_LFSR_H

#include <inttypes.h>

#define FIO_MAX_TAPS	8

struct lfsr_taps {
	unsigned int length;
	unsigned int taps[FIO_MAX_TAPS];
};


struct fio_lfsr {
	uint64_t last_val;
	uint64_t max_val;
	uint64_t num_vals;
	struct lfsr_taps taps;
};

int lfsr_next(struct fio_lfsr *fl, uint64_t *off, uint64_t);
int lfsr_init(struct fio_lfsr *fl, uint64_t size, unsigned long seed);

#endif
Commit	Line	Data
	1	#ifndef FIO_LFSR_H
	2	#define FIO_LFSR_H
	3
	4	#include <inttypes.h>
	5
	6	#define FIO_MAX_TAPS 8
	7
	8	struct lfsr_taps {
	9	unsigned int length;
	10	unsigned int taps[FIO_MAX_TAPS];
	11	};
	12
	13
	14	struct fio_lfsr {
	15	uint64_t last_val;
	16	uint64_t max_val;
	17	uint64_t num_vals;
	18	struct lfsr_taps taps;
	19	};
	20
	21	int lfsr_next(struct fio_lfsr fl, uint64_t off, uint64_t);
	22	int lfsr_init(struct fio_lfsr *fl, uint64_t size, unsigned long seed);
	23
	24	#endif