randomdev.h revision 128059 
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: head/sys/dev/random/randomdev.h 128059 2004-04-09 15:47:10Z markm $
27 */
28
29/* This header contains only those definitions that are global
30 * and non algorithm-specific for the entropy processor
31 */
32
33typedef void random_init_func_t(void);
34typedef void random_deinit_func_t(void);
35typedef int random_read_func_t(void *, int);
36typedef void random_write_func_t(void *, int);
37typedef void random_reseed_func_t(void);
38
39struct random_systat {
40	struct selinfo		rsel;
41	const char		*ident;
42	int			seeded;
43	random_init_func_t	*init;
44	random_deinit_func_t	*deinit;
45	random_read_func_t	*read;
46	random_write_func_t	*write;
47	random_reseed_func_t	*reseed;
48	struct mtx		lock;
49};
50
51extern struct random_systat random_systat;
52
53extern void random_ident_hardware(struct random_systat *);
54extern void random_null_func(void);
55