1
/* $Id: rand.h 3553 2011-05-05 06:14:19Z nanang $ */
3
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
4
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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.
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.
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
20
#ifndef __PJ_COMPAT_RAND_H__
21
#define __PJ_COMPAT_RAND_H__
25
* @brief Provides platform_rand() and platform_srand() functions.
28
#if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0
30
* Use stdlib based rand() and srand().
33
# define platform_srand srand
34
# if defined(RAND_MAX) && RAND_MAX <= 0xFFFF
36
* When rand() is only 16 bit strong, double the strength
37
* by calling it twice!
39
PJ_INLINE(int) platform_rand(void)
41
return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF);
44
# define platform_rand rand
47
#elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0
49
* Linux kernel mode random number generator.
51
# include <linux/random.h>
52
# define platform_srand(seed)
54
PJ_INLINE(int) platform_rand(void)
57
get_random_bytes((void*)&value, sizeof(value));
62
# warning "platform_rand() is not implemented"
63
# define platform_rand() 1
64
# define platform_srand(seed)
69
#endif /* __PJ_COMPAT_RAND_H__ */