1/* $NetBSD: poll.h,v 1.17 2024/11/01 16:37:42 nia Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _SYS_POLL_H_
33#define _SYS_POLL_H_
34
35#include <sys/featuretest.h>
36
37typedef unsigned int nfds_t;
38
39struct pollfd {
40 int fd; /* file descriptor */
41 short events; /* events to look for */
42 short revents; /* events returned */
43};
44
45/*
46 * Testable events (may be specified in events field).
47 */
48#define POLLIN 0x0001
49#define POLLPRI 0x0002
50#define POLLOUT 0x0004
51#define POLLRDNORM 0x0040
52#define POLLWRNORM POLLOUT
53#define POLLRDBAND 0x0080
54#define POLLWRBAND 0x0100
55
56/*
57 * Non-testable events (may not be specified in events field).
58 */
59#define POLLERR 0x0008
60#define POLLHUP 0x0010
61#define POLLNVAL 0x0020
62
63#if defined(_NETBSD_SOURCE)
64/*
65 * Infinite timeout value.
66 */
67#define INFTIM -1
68#endif
69
70#ifdef _KERNEL
71#include <sys/signal.h> /* for sigset_t */
72
73struct lwp;
74struct timespec;
75
76int pollcommon(register_t *, struct pollfd *, u_int,
77 struct timespec *, sigset_t *);
78
79#else
80#include <sys/cdefs.h>
81
82__BEGIN_DECLS
83int poll(struct pollfd *, nfds_t, int);
84__END_DECLS
85
86/*
87 * IEEE Std 1003.1-2024 (POSIX.1-2024)
88 */
89#if (_POSIX_C_SOURCE - 0) >= 202405L || (_XOPEN_SOURCE - 0 >= 800) || \
90 defined(_NETBSD_SOURCE)
91#include <sys/sigtypes.h> /* for sigset_t */
92struct timespec;
93
94__BEGIN_DECLS
95#ifndef __LIBC12_SOURCE__
96#ifdef _NETBSD_SOURCE
97int pollts(struct pollfd * __restrict, nfds_t,
98 const struct timespec * __restrict, const sigset_t * __restrict)
99 __RENAME(__pollts50);
100#endif
101int ppoll(struct pollfd * __restrict, nfds_t,
102 const struct timespec * __restrict, const sigset_t * __restrict);
103#endif /* __LIBC12_SOURCE__ */
104__END_DECLS
105#endif /* _NETBSD_SOURCE */
106
107#endif /* _KERNEL */
108
109#endif /* !_SYS_POLL_H_ */