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 | #if !defined(KERNEL) |
105 | |
106 | #include <sys/cdefs.h> |
107 | |
108 | __BEGIN_DECLS |
109 | |
110 | /* |
111 | * This is defined here (instead of <poll.h>) because this is where |
112 | * traditional SVR4 code will look to find it. |
113 | */ |
114 | extern int poll(struct pollfd *, nfds_t, int) __DARWIN_ALIAS_C(poll); |
115 | |
116 | __END_DECLS |
117 | |
118 | #endif /* !KERNEL */ |
119 | |
120 | #endif /* !_SYS_POLL_H_ */ |
121 | |