rand.h
921 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#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
*
* @returns 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.
*
* @seed value to use, updated on exit
* @returns next random number in the sequence
*/
unsigned int rand_r(unsigned int *seedp);
#endif