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37256ea45d
Review: https://reviewboard.asterisk.org/r/1891/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@369517 65c4cc65-6c06-0410-ace0-fbb531ad65f3
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* $Id$ */
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/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJ_COMPAT_RAND_H__
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#define __PJ_COMPAT_RAND_H__
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/**
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* @file rand.h
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* @brief Provides platform_rand() and platform_srand() functions.
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*/
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#if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0
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/*
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* Use stdlib based rand() and srand().
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*/
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# include <stdlib.h>
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# define platform_srand srand
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# if defined(RAND_MAX) && RAND_MAX <= 0xFFFF
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/*
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* When rand() is only 16 bit strong, double the strength
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* by calling it twice!
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*/
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PJ_INLINE(int) platform_rand(void)
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{
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return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF);
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}
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# else
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# define platform_rand rand
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# endif
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#elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0
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/*
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* Linux kernel mode random number generator.
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*/
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# include <linux/random.h>
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# define platform_srand(seed)
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PJ_INLINE(int) platform_rand(void)
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{
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int value;
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get_random_bytes((void*)&value, sizeof(value));
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return value;
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}
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#else
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# warning "platform_rand() is not implemented"
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# define platform_rand() 1
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# define platform_srand(seed)
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#endif
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#endif /* __PJ_COMPAT_RAND_H__ */
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