| Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #ifndef __PJ_COMPAT_RAND_H__ |
| 21 | #define __PJ_COMPAT_RAND_H__ |
| 22 | |
| 23 | /** |
| 24 | * @file rand.h |
| 25 | * @brief Provides platform_rand() and platform_srand() functions. |
| 26 | */ |
| 27 | |
| 28 | #if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0 |
| 29 | /* |
| 30 | * Use stdlib based rand() and srand(). |
| 31 | */ |
| 32 | # include <stdlib.h> |
| 33 | # define platform_srand srand |
| 34 | # if defined(RAND_MAX) && RAND_MAX <= 0xFFFF |
| 35 | /* |
| 36 | * When rand() is only 16 bit strong, double the strength |
| 37 | * by calling it twice! |
| 38 | */ |
| 39 | PJ_INLINE(int) platform_rand(void) |
| 40 | { |
| 41 | return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF); |
| 42 | } |
| 43 | # else |
| 44 | # define platform_rand rand |
| 45 | # endif |
| 46 | |
| 47 | #elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0 |
| 48 | /* |
| 49 | * Linux kernel mode random number generator. |
| 50 | */ |
| 51 | # include <linux/random.h> |
| 52 | # define platform_srand(seed) |
| 53 | |
| 54 | PJ_INLINE(int) platform_rand(void) |
| 55 | { |
| 56 | int value; |
| 57 | get_random_bytes((void*)&value, sizeof(value)); |
| 58 | return value; |
| 59 | } |
| 60 | |
| 61 | #else |
| 62 | # warning "platform_rand() is not implemented" |
| 63 | # define platform_rand() 1 |
| 64 | # define platform_srand(seed) |
| 65 | |
| 66 | #endif |
| 67 | |
| 68 | |
| 69 | #endif /* __PJ_COMPAT_RAND_H__ */ |
| 70 | |