1 | /* $NetBSD: poll.h,v 1.15 2009/11/11 09:48:51 rmind 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 timespec; |
75 | |
76 | int pollcommon(register_t *, struct pollfd *, u_int, |
77 | struct timespec *, sigset_t *); |
78 | |
79 | #else |
80 | #include <sys/cdefs.h> |
81 | |
82 | __BEGIN_DECLS |
83 | int poll(struct pollfd *, nfds_t, int); |
84 | __END_DECLS |
85 | |
86 | #ifdef _NETBSD_SOURCE |
87 | #include <sys/sigtypes.h> /* for sigset_t */ |
88 | struct timespec; |
89 | |
90 | __BEGIN_DECLS |
91 | #ifndef __LIBC12_SOURCE__ |
92 | int pollts(struct pollfd * __restrict, nfds_t, |
93 | const struct timespec * __restrict, const sigset_t * __restrict) |
94 | __RENAME(__pollts50); |
95 | #endif /* __LIBC12_SOURCE__ */ |
96 | __END_DECLS |
97 | #endif /* _NETBSD_SOURCE */ |
98 | |
99 | #endif /* _KERNEL */ |
100 | |
101 | #endif /* !_SYS_POLL_H_ */ |
102 | |