1 /* $NetBSD: event.h,v 1.4 2023/07/29 11:58:53 rin Exp $ */
2
3 /*-
4 * Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@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 struct timespec;
36
37 #ifdef _KERNEL
38 #include <lib/libkern/libkern.h>
39 #else
40 #include <string.h>
41 #endif
42
43 struct kevent100 {
44 uintptr_t ident; /* identifier for this event */
45 uint32_t filter; /* filter for event */
46 uint32_t flags; /* action flags for kqueue */
47 uint32_t fflags; /* filter flag value */
48 int64_t data; /* filter data value */
49 void *udata; /* opaque user data identifier */
50 };
51
52 static __inline void
kevent100_to_kevent(const struct kevent100 * kev100,struct kevent * kev)53 kevent100_to_kevent(const struct kevent100 *kev100, struct kevent *kev)
54 {
55 memset(kev, 0, sizeof(*kev));
56 memcpy(kev, kev100, sizeof(*kev100));
57 }
58
59 static __inline void
kevent_to_kevent100(const struct kevent * kev,struct kevent100 * kev100)60 kevent_to_kevent100(const struct kevent *kev, struct kevent100 *kev100)
61 {
62 memcpy(kev100, kev, sizeof(*kev100));
63 }
64
65 #ifdef _KERNEL
66 static __inline int
compat_100___kevent50_fetch_changes(void * ctx,const struct kevent * changelist,struct kevent * changes,size_t index,int n)67 compat_100___kevent50_fetch_changes(void *ctx, const struct kevent *changelist,
68 struct kevent *changes, size_t index, int n)
69 {
70 int error, i;
71 struct kevent100 *buf;
72 const size_t buf_size = sizeof(*buf) * n;
73 const struct kevent100 *changelist100 = (const struct kevent100 *)changelist;
74
75 KASSERT(n >= 0);
76
77 buf = kmem_alloc(buf_size, KM_SLEEP);
78
79 error = copyin(changelist100 + index, buf, buf_size);
80 if (error != 0)
81 goto leave;
82
83 for (i = 0; i < n; i++)
84 kevent100_to_kevent(buf + i, changes + i);
85
86 leave:
87 kmem_free(buf, buf_size);
88 return error;
89 }
90
91 static __inline int
compat_100___kevent50_put_events(void * ctx,struct kevent * events,struct kevent * eventlist,size_t index,int n)92 compat_100___kevent50_put_events(void *ctx, struct kevent *events,
93 struct kevent *eventlist, size_t index, int n)
94 {
95 int error, i;
96 struct kevent100 *buf;
97 const size_t buf_size = sizeof(*buf) * n;
98 struct kevent100 *eventlist100 = (struct kevent100 *)eventlist;
99
100 KASSERT(n >= 0);
101
102 buf = kmem_alloc(buf_size, KM_SLEEP);
103
104 for (i = 0; i < n; i++)
105 kevent_to_kevent100(events + i, buf + i);
106
107 error = copyout(buf, eventlist100 + index, buf_size);
108
109 kmem_free(buf, buf_size);
110 return error;
111 }
112 #endif /* _KERNEL */
113
114 __BEGIN_DECLS
115 int kevent(int, const struct kevent100 *, size_t, struct kevent100 *,
116 size_t, const struct timespec50 *);
117 int __kevent50(int, const struct kevent100 *, size_t, struct kevent100 *,
118 size_t, const struct timespec *);
119 int __kevent100(int, const struct kevent *, size_t, struct kevent *,
120 size_t, const struct timespec *);
121 __END_DECLS
122
123 #endif /* !_COMPAT_SYS_EVENT_H_ */
124