1/*	$NetBSD: poll.h,v 1.16 2020/07/17 15:34:16 kamil 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#ifdef _NETBSD_SOURCE
87#include <sys/sigtypes.h>	/* for sigset_t */
88struct timespec;
89
90__BEGIN_DECLS
91#ifndef __LIBC12_SOURCE__
92int	pollts(struct pollfd * __restrict, nfds_t,
93    const struct timespec * __restrict, const sigset_t * __restrict)
94    __RENAME(__pollts50);
95int	ppoll(struct pollfd * __restrict, nfds_t,
96    const struct timespec * __restrict, const sigset_t * __restrict);
97#endif /* __LIBC12_SOURCE__ */
98__END_DECLS
99#endif /* _NETBSD_SOURCE */
100
101#endif /* _KERNEL */
102
103#endif /* !_SYS_POLL_H_ */
104