1/*	$NetBSD: hook.h,v 1.1 2021/09/30 01:26:07 yamaguchi Exp $	*/
 2
 3/*
 4 * Copyright (c) 2021 Internet Initiative Japan Inc.
 5 * All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef _SYS_HOOK_H_
30#define _SYS_HOOK_H_
31
32#include <sys/mutex.h>
33
34#define HOOKNAMSIZ	128
35
36struct khook_list;
37struct hook_desc;
38
39typedef struct khook_list	khook_list_t;
40typedef struct hook_desc	khook_t;
41
42khook_list_t	*simplehook_create(int, const char *);
43void		 simplehook_destroy(khook_list_t *);
44int		 simplehook_dohooks(khook_list_t *);
45
46khook_t		*simplehook_establish(khook_list_t *,
47		    void (*)(void *), void *);
48void		 simplehook_disestablish(khook_list_t *,
49		    khook_t *, kmutex_t *);
50bool		 simplehook_has_hooks(khook_list_t *);
51
52#endif /* !_SYS_HOOK_H_ */