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/* $NetBSD: hook.h,v 1.1 2021/09/30 01:26:07 yamaguchi Exp $ */
/*
* Copyright (c) 2021 Internet Initiative Japan Inc.
* 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, 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#ifndef _SYS_HOOK_H_
#define _SYS_HOOK_H_
#include <sys/mutex.h>
#define HOOKNAMSIZ 128
struct khook_list;
struct hook_desc;
typedef struct khook_list khook_list_t;
typedef struct hook_desc khook_t;
khook_list_t *simplehook_create(int, const char *);
void simplehook_destroy(khook_list_t *);
int simplehook_dohooks(khook_list_t *);
khook_t *simplehook_establish(khook_list_t *,
void (*)(void *), void *);
void simplehook_disestablish(khook_list_t *,
khook_t *, kmutex_t *);
bool simplehook_has_hooks(khook_list_t *);
#endif /* !_SYS_HOOK_H_ */
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