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_ */