FreeBSD/Linux Kernel Cross Reference
sys/sys/poll.h
1 /* $NetBSD: poll.h,v 1.12 2008/04/28 20:24:11 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _SYS_POLL_H_
33 #define _SYS_POLL_H_
34
35 #include <sys/featuretest.h>
36
37 typedef unsigned int nfds_t;
38
39 struct pollfd {
40 int fd; /* file descriptor */
41 short events; /* events to look for */
42 short revents; /* events returned */
43 };
44
45 /*
46 * Testable events (may be specified in events field).
47 */
48 #define POLLIN 0x0001
49 #define POLLPRI 0x0002
50 #define POLLOUT 0x0004
51 #define POLLRDNORM 0x0040
52 #define POLLWRNORM POLLOUT
53 #define POLLRDBAND 0x0080
54 #define POLLWRBAND 0x0100
55
56 /*
57 * Non-testable events (may not be specified in events field).
58 */
59 #define POLLERR 0x0008
60 #define POLLHUP 0x0010
61 #define POLLNVAL 0x0020
62
63 #if defined(_NETBSD_SOURCE)
64 /*
65 * Infinite timeout value.
66 */
67 #define INFTIM -1
68 #endif
69
70 #ifdef _KERNEL
71 #include <sys/signal.h> /* for sigset_t */
72
73 struct lwp;
74 struct timeval;
75
76 int pollcommon(struct lwp *, register_t *, struct pollfd *, u_int,
77 struct timeval *, sigset_t *);
78 #else
79 #include <sys/cdefs.h>
80
81 __BEGIN_DECLS
82 int poll(struct pollfd *, nfds_t, int);
83 __END_DECLS
84
85 #ifdef _NETBSD_SOURCE
86 #include <sys/sigtypes.h> /* for sigset_t */
87 struct timespec;
88
89 __BEGIN_DECLS
90 int pollts(struct pollfd * __restrict, nfds_t,
91 const struct timespec * __restrict, const sigset_t * __restrict);
92 __END_DECLS
93 #endif /* _NETBSD_SOURCE */
94
95 #endif /* _KERNEL */
96
97 #endif /* !_SYS_POLL_H_ */
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