projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 840ef4d4 SG |
1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | /* | |
| 3 | * (C) Copyright 2000-2009 | |
| 4 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
| 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 |
| 36 | * Return: next random number in the sequence | |
| 840ef4d4 SG |
37 | */ |
| 38 | unsigned int rand_r(unsigned int *seedp); | |
| 39 | ||
| 40 | #endif |