| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #ifndef __PJ_COMPAT_RAND_H__ |
| #define __PJ_COMPAT_RAND_H__ |
| |
| /** |
| * @file rand.h |
| * @brief Provides platform_rand() and platform_srand() functions. |
| */ |
| |
| #if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0 |
| /* |
| * Use stdlib based rand() and srand(). |
| */ |
| # include <stdlib.h> |
| # define platform_srand srand |
| # if defined(RAND_MAX) && RAND_MAX <= 0xFFFF |
| /* |
| * When rand() is only 16 bit strong, double the strength |
| * by calling it twice! |
| */ |
| PJ_INLINE(int) platform_rand(void) |
| { |
| return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF); |
| } |
| # else |
| # define platform_rand rand |
| # endif |
| |
| #elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0 |
| /* |
| * Linux kernel mode random number generator. |
| */ |
| # include <linux/random.h> |
| # define platform_srand(seed) |
| |
| PJ_INLINE(int) platform_rand(void) |
| { |
| int value; |
| get_random_bytes((void*)&value, sizeof(value)); |
| return value; |
| } |
| |
| #else |
| # warning "platform_rand() is not implemented" |
| # define platform_rand() 1 |
| # define platform_srand(seed) |
| |
| #endif |
| |
| |
| #endif /* __PJ_COMPAT_RAND_H__ */ |
| |