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      1 /*	$NetBSD: event.h,v 1.5 2025/04/04 20:51:32 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon (at) FreeBSD.org>
      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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  *	$FreeBSD: src/sys/sys/event.h,v 1.12 2001/02/24 01:44:03 jlemon Exp $
     29  */
     30 
     31 #ifndef _COMPAT_SYS_EVENT_H_
     32 #define	_COMPAT_SYS_EVENT_H_
     33 
     34 #include <sys/cdefs.h>
     35 
     36 struct timespec;
     37 struct timespec50;
     38 
     39 #ifdef _KERNEL
     40 #include <lib/libkern/libkern.h>
     41 #else
     42 #include <string.h>
     43 #endif
     44 
     45 struct kevent100 {
     46 	uintptr_t	ident;		/* identifier for this event */
     47 	uint32_t	filter;		/* filter for event */
     48 	uint32_t	flags;		/* action flags for kqueue */
     49 	uint32_t	fflags;		/* filter flag value */
     50 	int64_t		data;		/* filter data value */
     51 	void		*udata;		/* opaque user data identifier */
     52 };
     53 
     54 static __inline void
     55 kevent100_to_kevent(const struct kevent100 *kev100, struct kevent *kev)
     56 {
     57 	memset(kev, 0, sizeof(*kev));
     58 	memcpy(kev, kev100, sizeof(*kev100));
     59 }
     60 
     61 static __inline void
     62 kevent_to_kevent100(const struct kevent *kev, struct kevent100 *kev100)
     63 {
     64 	memcpy(kev100, kev, sizeof(*kev100));
     65 }
     66 
     67 #ifdef _KERNEL
     68 static __inline int
     69 compat_100___kevent50_fetch_changes(void *ctx, const struct kevent *changelist,
     70     struct kevent *changes, size_t index, int n)
     71 {
     72 	int error, i;
     73 	struct kevent100 *buf;
     74 	const size_t buf_size = sizeof(*buf) * n;
     75 	const struct kevent100 *changelist100 = (const struct kevent100 *)changelist;
     76 
     77 	KASSERT(n >= 0);
     78 
     79 	buf = kmem_alloc(buf_size, KM_SLEEP);
     80 
     81 	error = copyin(changelist100 + index, buf, buf_size);
     82 	if (error != 0)
     83 		goto leave;
     84 
     85 	for (i = 0; i < n; i++)
     86 		kevent100_to_kevent(buf + i, changes + i);
     87 
     88 leave:
     89 	kmem_free(buf, buf_size);
     90 	return error;
     91 }
     92 
     93 static __inline int
     94 compat_100___kevent50_put_events(void *ctx, struct kevent *events,
     95     struct kevent *eventlist, size_t index, int n)
     96 {
     97 	int error, i;
     98         struct kevent100 *buf;
     99 	const size_t buf_size = sizeof(*buf) * n;
    100 	struct kevent100 *eventlist100 = (struct kevent100 *)eventlist;
    101 
    102 	KASSERT(n >= 0);
    103 
    104 	buf = kmem_alloc(buf_size, KM_SLEEP);
    105 
    106 	for (i = 0; i < n; i++)
    107 	        kevent_to_kevent100(events + i, buf + i);
    108 
    109 	error = copyout(buf, eventlist100 + index, buf_size);
    110 
    111 	kmem_free(buf, buf_size);
    112 	return error;
    113 }
    114 #endif /* _KERNEL */
    115 
    116 __BEGIN_DECLS
    117 int	kevent(int, const struct kevent100 *, size_t, struct kevent100 *,
    118     size_t, const struct timespec50 *);
    119 int	__kevent50(int, const struct kevent100 *, size_t, struct kevent100 *,
    120     size_t, const struct timespec *);
    121 int	__kevent100(int, const struct kevent *, size_t, struct kevent *,
    122     size_t, const struct timespec *);
    123 __END_DECLS
    124 
    125 #endif /* !_COMPAT_SYS_EVENT_H_ */
    126