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/* $NetBSD: poll.h,v 1.16 2020/07/17 15:34:16 kamil Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_POLL_H_
#define _SYS_POLL_H_
#include <sys/featuretest.h>
typedef unsigned int nfds_t;
struct pollfd {
int fd; /* file descriptor */
short events; /* events to look for */
short revents; /* events returned */
};
/*
* Testable events (may be specified in events field).
*/
#define POLLIN 0x0001
#define POLLPRI 0x0002
#define POLLOUT 0x0004
#define POLLRDNORM 0x0040
#define POLLWRNORM POLLOUT
#define POLLRDBAND 0x0080
#define POLLWRBAND 0x0100
/*
* Non-testable events (may not be specified in events field).
*/
#define POLLERR 0x0008
#define POLLHUP 0x0010
#define POLLNVAL 0x0020
#if defined(_NETBSD_SOURCE)
/*
* Infinite timeout value.
*/
#define INFTIM -1
#endif
#ifdef _KERNEL
#include <sys/signal.h> /* for sigset_t */
struct lwp;
struct timespec;
int pollcommon(register_t *, struct pollfd *, u_int,
struct timespec *, sigset_t *);
#else
#include <sys/cdefs.h>
__BEGIN_DECLS
int poll(struct pollfd *, nfds_t, int);
__END_DECLS
#ifdef _NETBSD_SOURCE
#include <sys/sigtypes.h> /* for sigset_t */
struct timespec;
__BEGIN_DECLS
#ifndef __LIBC12_SOURCE__
int pollts(struct pollfd * __restrict, nfds_t,
const struct timespec * __restrict, const sigset_t * __restrict)
__RENAME(__pollts50);
int ppoll(struct pollfd * __restrict, nfds_t,
const struct timespec * __restrict, const sigset_t * __restrict);
#endif /* __LIBC12_SOURCE__ */
__END_DECLS
#endif /* _NETBSD_SOURCE */
#endif /* _KERNEL */
#endif /* !_SYS_POLL_H_ */
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