FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/random.h

     /*-
      * Copyright (c) 2010 Isilon Systems, Inc.
      * Copyright (c) 2010 iX Systems, Inc.
      * Copyright (c) 2010 Panasas, Inc.
      * Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice unmodified, this list of conditions, and the following
     *    disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _LINUXKPI_LINUX_RANDOM_H_
    #define _LINUXKPI_LINUX_RANDOM_H_
    
    #include <linux/types.h>
    #include <sys/random.h>
    #include <sys/libkern.h>
    
    #define get_random_u32() get_random_int()
    
    static inline void
    get_random_bytes(void *buf, int nbytes)
    {
    
            arc4random_buf(buf, nbytes);
    }
    
    static inline u_int
    get_random_int(void)
    {
            u_int val;
    
            get_random_bytes(&val, sizeof(val));
            return (val);
    }
    
    static inline u_long
    get_random_long(void)
    {
            u_long val;
    
            get_random_bytes(&val, sizeof(val));
            return (val);
    }
    
    static __inline uint32_t
    prandom_u32(void)
    {
            uint32_t val;
    
            get_random_bytes(&val, sizeof(val));
            return (val);
    }
    
    static inline u32
    prandom_u32_max(u32 max)
    {
            return (arc4random_uniform(max));
    }
    
    #endif /* _LINUXKPI_LINUX_RANDOM_H_ */

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