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/* $Header: /pjproject-0.3/pjlib/include/pj/compat/rand.h 3 10/14/05 12:26a Bennylp $ */
/* $Log: /pjproject-0.3/pjlib/include/pj/compat/rand.h $
*
* 3 10/14/05 12:26a Bennylp
* Finished error code framework, some fixes in ioqueue, etc. Pretty
* major.
*
* 2 9/21/05 1:39p Bennylp
* Periodic checkin for backup.
*
* 1 9/17/05 10:36a Bennylp
* Created.
*
*/
#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__ */
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