poll.h (4876B) - Raw
1 /* 2 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /*- 29 * Copyright (c) 1997 Peter Wemm <peter@freebsd.org> 30 * All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. The name of the author may not be used to endorse or promote products 41 * derived from this software without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 * 55 */ 56 57 #ifndef _SYS_POLL_H_ 58 #define _SYS_POLL_H_ 59 60 /* 61 * This file is intended to be compatible with the traditional poll.h. 62 */ 63 64 /* 65 * Requestable events. If poll(2) finds any of these set, they are 66 * copied to revents on return. 67 */ 68 #define POLLIN 0x0001 /* any readable data available */ 69 #define POLLPRI 0x0002 /* OOB/Urgent readable data */ 70 #define POLLOUT 0x0004 /* file descriptor is writeable */ 71 #define POLLRDNORM 0x0040 /* non-OOB/URG data available */ 72 #define POLLWRNORM POLLOUT /* no write type differentiation */ 73 #define POLLRDBAND 0x0080 /* OOB/Urgent readable data */ 74 #define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */ 75 76 /* 77 * FreeBSD extensions: polling on a regular file might return one 78 * of these events (currently only supported on local filesystems). 79 */ 80 #define POLLEXTEND 0x0200 /* file may have been extended */ 81 #define POLLATTRIB 0x0400 /* file attributes may have changed */ 82 #define POLLNLINK 0x0800 /* (un)link/rename may have happened */ 83 #define POLLWRITE 0x1000 /* file's contents may have changed */ 84 85 /* 86 * These events are set if they occur regardless of whether they were 87 * requested. 88 */ 89 #define POLLERR 0x0008 /* some poll error occurred */ 90 #define POLLHUP 0x0010 /* file descriptor was "hung up" */ 91 #define POLLNVAL 0x0020 /* requested events "invalid" */ 92 93 #define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\ 94 POLLWRBAND|POLLERR|POLLHUP|POLLNVAL) 95 96 struct pollfd { 97 int fd; 98 short events; 99 short revents; 100 }; 101 102 typedef unsigned int nfds_t; 103 104 105 #include <sys/cdefs.h> 106 107 __BEGIN_DECLS 108 109 /* 110 * This is defined here (instead of <poll.h>) because this is where 111 * traditional SVR4 code will look to find it. 112 */ 113 extern int poll(struct pollfd *, nfds_t, int) __DARWIN_ALIAS_C(poll); 114 115 __END_DECLS 116 117 118 #endif /* !_SYS_POLL_H_ */