120 lines
4.8 KiB
C
120 lines
4.8 KiB
C
/*
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* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*-
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* Copyright (c) 1997 Peter Wemm <peter@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef _SYS_POLL_H_
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#define _SYS_POLL_H_
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/*
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* This file is intended to be compatible with the traditional poll.h.
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*/
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/*
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* Requestable events. If poll(2) finds any of these set, they are
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* copied to revents on return.
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*/
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#define POLLIN 0x0001 /* any readable data available */
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#define POLLPRI 0x0002 /* OOB/Urgent readable data */
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#define POLLOUT 0x0004 /* file descriptor is writeable */
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#define POLLRDNORM 0x0040 /* non-OOB/URG data available */
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#define POLLWRNORM POLLOUT /* no write type differentiation */
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#define POLLRDBAND 0x0080 /* OOB/Urgent readable data */
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#define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */
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/*
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* FreeBSD extensions: polling on a regular file might return one
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* of these events (currently only supported on local filesystems).
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*/
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#define POLLEXTEND 0x0200 /* file may have been extended */
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#define POLLATTRIB 0x0400 /* file attributes may have changed */
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#define POLLNLINK 0x0800 /* (un)link/rename may have happened */
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#define POLLWRITE 0x1000 /* file's contents may have changed */
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/*
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* These events are set if they occur regardless of whether they were
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* requested.
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*/
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#define POLLERR 0x0008 /* some poll error occurred */
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#define POLLHUP 0x0010 /* file descriptor was "hung up" */
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#define POLLNVAL 0x0020 /* requested events "invalid" */
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#define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\
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POLLWRBAND|POLLERR|POLLHUP|POLLNVAL)
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struct pollfd {
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int fd;
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short events;
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short revents;
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};
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typedef unsigned int nfds_t;
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#if !defined(KERNEL)
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/*
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* This is defined here (instead of <poll.h>) because this is where
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* traditional SVR4 code will look to find it.
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*/
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extern int poll(struct pollfd *, nfds_t, int) __DARWIN_ALIAS_C(poll);
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__END_DECLS
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#endif /* !KERNEL */
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#endif /* !_SYS_POLL_H_ */
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