[J-u-boot.git] / include / rand.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 */

#ifndef __RAND_H
#define __RAND_H

#define RAND_MAX -1U

/**
 * srand() - Set the random-number seed value
 *
 * This can be used to restart the pseudo-random-number sequence from a known
 * point. This affects future calls to rand() to start from that point
 *
 * @seed: New seed
 */
void srand(unsigned int seed);

/**
 * rand() - Get a 32-bit pseudo-random number
 *
 * Return:	next random number in the sequence
 */
unsigned int rand(void);

/**
 * rand_r() - Get a 32-bit pseudo-random number
 *
 * This version of the function allows multiple sequences to be used at the
 * same time, since it requires the caller to store the seed value.
 *
 * @seedp:	seed value to use, updated on exit
 * Return:	 next random number in the sequence
 */
unsigned int rand_r(unsigned int *seedp);

#endif
Commit	Line	Data
840ef4d4 SG	1	/* SPDX-License-Identifier: GPL-2.0+ */
	2	/*
	3	* (C) Copyright 2000-2009
	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
	5	*/
	6
	7	#ifndef __RAND_H
	8	#define __RAND_H
	9
	10	#define RAND_MAX -1U
	11
	12	/**
	13	* srand() - Set the random-number seed value
	14	*
	15	* This can be used to restart the pseudo-random-number sequence from a known
	16	* point. This affects future calls to rand() to start from that point
	17	*
	18	* @seed: New seed
	19	*/
	20	void srand(unsigned int seed);
	21
	22	/**
	23	* rand() - Get a 32-bit pseudo-random number
	24	*
c7ff87e0	25	* Return: next random number in the sequence
840ef4d4 SG	26	*/
	27	unsigned int rand(void);
	28
	29	/**
	30	* rand_r() - Get a 32-bit pseudo-random number
	31	*
	32	* This version of the function allows multiple sequences to be used at the
	33	* same time, since it requires the caller to store the seed value.
	34	*
c7ff87e0 HS	35	* @seedp: seed value to use, updated on exit
c7ff87e0 HS	36	* Return: next random number in the sequence
840ef4d4 SG	37	*/
	38	unsigned int rand_r(unsigned int *seedp);
	39
	40	#endif