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

     /*
      *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
      *  Copyright (C) 2007 The Regents of the University of California.
      *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
      *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
      *  UCRL-CODE-235197
      *
      *  This file is part of the SPL, Solaris Porting Layer.
      *
     *  The SPL 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.
     *
     *  The SPL 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 the SPL.  If not, see <http://www.gnu.org/licenses/>.
     */
    
    #ifndef _SPL_RANDOM_H
    #define _SPL_RANDOM_H
    
    #include <linux/module.h>
    #include <linux/random.h>
    
    static __inline__ int
    random_get_bytes(uint8_t *ptr, size_t len)
    {
            get_random_bytes((void *)ptr, (int)len);
            return (0);
    }
    
    extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
    
    static __inline__ uint32_t
    random_in_range(uint32_t range)
    {
            uint32_t r;
    
            ASSERT(range != 0);
    
            if (range == 1)
                    return (0);
    
            (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r));
    
            return (r % range);
    }
    
    #endif  /* _SPL_RANDOM_H */

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