| | 1 | /* |
| | 2 | * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /*- |
| | 23 | * Copyright (c) 1997 Peter Wemm <peter@freebsd.org> |
| | 24 | * All rights reserved. |
| | 25 | * |
| | 26 | * Redistribution and use in source and binary forms, with or without |
| | 27 | * modification, are permitted provided that the following conditions |
| | 28 | * are met: |
| | 29 | * 1. Redistributions of source code must retain the above copyright |
| | 30 | * notice, this list of conditions and the following disclaimer. |
| | 31 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 32 | * notice, this list of conditions and the following disclaimer in the |
| | 33 | * documentation and/or other materials provided with the distribution. |
| | 34 | * 3. The name of the author may not be used to endorse or promote products |
| | 35 | * derived from this software without specific prior written permission. |
| | 36 | * |
| | 37 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| | 38 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 40 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| | 41 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 42 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 43 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 45 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 46 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 47 | * SUCH DAMAGE. |
| | 48 | * |
| | 49 | */ |
| | 50 | |
| | 51 | #ifndef _SYS_POLL_H_ |
| | 52 | #define _SYS_POLL_H_ |
| | 53 | |
| | 54 | /* |
| | 55 | * This file is intended to be compatible with the traditional poll.h. |
| | 56 | */ |
| | 57 | |
| | 58 | /* |
| | 59 | * Requestable events. If poll(2) finds any of these set, they are |
| | 60 | * copied to revents on return. |
| | 61 | */ |
| | 62 | #define POLLIN 0x0001 /* any readable data available */ |
| | 63 | #define POLLPRI 0x0002 /* OOB/Urgent readable data */ |
| | 64 | #define POLLOUT 0x0004 /* file descriptor is writeable */ |
| | 65 | #define POLLRDNORM 0x0040 /* non-OOB/URG data available */ |
| | 66 | #define POLLWRNORM POLLOUT /* no write type differentiation */ |
| | 67 | #define POLLRDBAND 0x0080 /* OOB/Urgent readable data */ |
| | 68 | #define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */ |
| | 69 | |
| | 70 | /* |
| | 71 | * FreeBSD extensions: polling on a regular file might return one |
| | 72 | * of these events (currently only supported on local filesystems). |
| | 73 | */ |
| | 74 | #define POLLEXTEND 0x0200 /* file may have been extended */ |
| | 75 | #define POLLATTRIB 0x0400 /* file attributes may have changed */ |
| | 76 | #define POLLNLINK 0x0800 /* (un)link/rename may have happened */ |
| | 77 | #define POLLWRITE 0x1000 /* file's contents may have changed */ |
| | 78 | |
| | 79 | /* |
| | 80 | * These events are set if they occur regardless of whether they were |
| | 81 | * requested. |
| | 82 | */ |
| | 83 | #define POLLERR 0x0008 /* some poll error occurred */ |
| | 84 | #define POLLHUP 0x0010 /* file descriptor was "hung up" */ |
| | 85 | #define POLLNVAL 0x0020 /* requested events "invalid" */ |
| | 86 | |
| | 87 | #define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\ |
| | 88 | POLLWRBAND|POLLERR|POLLHUP|POLLNVAL) |
| | 89 | |
| | 90 | struct pollfd |
| | 91 | { |
| | 92 | int fd; |
| | 93 | short events; |
| | 94 | short revents; |
| | 95 | }; |
| | 96 | |
| | 97 | typedef unsigned int nfds_t; |
| | 98 | |
| | 99 | #if !defined(KERNEL) |
| | 100 | |
| | 101 | #include <sys/cdefs.h> |
| | 102 | |
| | 103 | __BEGIN_DECLS |
| | 104 | |
| | 105 | /* |
| | 106 | * This is defined here (instead of <poll.h>) because this is where |
| | 107 | * traditional SVR4 code will look to find it. |
| | 108 | */ |
| | 109 | extern int poll (struct pollfd *, nfds_t, int); |
| | 110 | |
| | 111 | __END_DECLS |
| | 112 | |
| | 113 | #endif /* !KERNEL */ |
| | 114 | |
| | 115 | #endif /* !_SYS_POLL_H_ */ |
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