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1.1 root 1: /*
2: * Copyright (c) 2000 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 <[email protected]>
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 compatable 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: * XXX Note that FreeBSD doesn't make much distinction between POLLPRI
62: * and POLLRDBAND since none of the file types have distinct priority
63: * bands - and only some have an urgent "mode".
64: * XXX Note POLLIN isn't really supported in true SVSV terms. Under SYSV
65: * POLLIN includes all of normal, band and urgent data. Most poll handlers
66: * on FreeBSD only treat it as "normal" data.
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 UFS).
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:
97: #endif /* !_SYS_POLL_H_ */
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