random.h

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    1 /*
    2  * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _OPENSOLARIS_SYS_RANDOM_H_
   30 #define _OPENSOLARIS_SYS_RANDOM_H_
   31 
   32 #include_next <sys/random.h>
   33 #if  __FreeBSD_version >= 1300108
   34 #include <sys/prng.h>
   35 #endif
   36 
   37 static inline int
   38 random_get_bytes(uint8_t *p, size_t s)
   39 {
   40         arc4rand(p, (int)s, 0);
   41         return (0);
   42 }
   43 
   44 static inline int
   45 random_get_pseudo_bytes(uint8_t *p, size_t s)
   46 {
   47         arc4rand(p, (int)s, 0);
   48         return (0);
   49 }
   50 
   51 static inline uint32_t
   52 random_in_range(uint32_t range)
   53 {
   54 #if defined(_KERNEL) && __FreeBSD_version >= 1300108
   55         return (prng32_bounded(range));
   56 #else
   57         uint32_t r;
   58 
   59         ASSERT(range != 0);
   60 
   61         if (range == 1)
   62                 return (0);
   63 
   64         (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r));
   65 
   66         return (r % range);
   67 #endif
   68 }
   69 
   70 #endif  /* !_OPENSOLARIS_SYS_RANDOM_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/os/freebsd/spl/sys/random.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/random.h