The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/random/randomdev.h

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    1 /*-
    2  * Copyright (c) 2000-2004 Mark R V Murray
    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  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/8.1/sys/dev/random/randomdev.h 153575 2005-12-20 21:41:52Z ps $
   27  */
   28 
   29 /* This header contains only those definitions that are global
   30  * and non algorithm-specific for the entropy processor
   31  */
   32 
   33 typedef void random_init_func_t(void);
   34 typedef void random_deinit_func_t(void);
   35 typedef int random_block_func_t(int);
   36 typedef int random_read_func_t(void *, int);
   37 typedef void random_write_func_t(void *, int);
   38 typedef int random_poll_func_t(int, struct thread *);
   39 typedef void random_reseed_func_t(void);
   40 
   41 struct random_systat {
   42         struct selinfo          rsel;
   43         const char              *ident;
   44         int                     seeded;
   45         random_init_func_t      *init;
   46         random_deinit_func_t    *deinit;
   47         random_block_func_t     *block;
   48         random_read_func_t      *read;
   49         random_write_func_t     *write;
   50         random_poll_func_t      *poll;
   51         random_reseed_func_t    *reseed;
   52 };
   53 
   54 extern struct random_systat random_systat;
   55 
   56 extern void random_ident_hardware(struct random_systat *);
   57 extern void random_null_func(void);

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