1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
24 *
25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
26 *
27 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
32 /* All Rights Reserved */
33
34 /*
35 * University Copyright- Copyright (c) 1982, 1986, 1988
36 * The Regents of the University of California
37 * All Rights Reserved
38 *
39 * University Acknowledgment- Portions of this document are derived from
40 * software developed by the University of California, Berkeley, and its
41 * contributors.
42 */
43
44 #ifndef _SYS_SELECT_H
45 #define _SYS_SELECT_H
46
47 #include <sys/feature_tests.h>
48
49 #if !defined(_KERNEL) && !defined(_FAKE_KERNEL)
50 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
51 #include <sys/time_impl.h>
52 #endif
53 #include <sys/time.h>
54 #endif /* !_KERNEL */
55
56 #ifdef __cplusplus
57 extern "C" {
58 #endif
59
60
61 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
62 /*
63 * The sigset_t type is defined in <sys/signal.h> and duplicated
64 * in <sys/ucontext.h> as a result of XPG4v2 requirements. XPG6
65 * now allows the visibility of signal.h in this header, however
66 * an order of inclusion problem occurs as a result of inclusion
67 * of <sys/select.h> in <signal.h> under certain conditions.
68 * Rather than include <sys/signal.h> here, we've duplicated
69 * the sigset_t type instead. This type is required for the XPG6
70 * introduced pselect() function also declared in this header.
71 */
72 #ifndef _SIGSET_T
73 #define _SIGSET_T
74 typedef struct { /* signal set type */
75 unsigned int __sigbits[4];
76 } sigset_t;
77 #endif /* _SIGSET_T */
78
79 #endif /* #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
80
81 /*
82 * Select uses bit masks of file descriptors in longs.
83 * These macros manipulate such bit fields.
84 * FD_SETSIZE may be defined by the user, but the default here
85 * should be >= NOFILE (param.h).
86 */
87 #ifndef FD_SETSIZE
88 #ifdef _LP64
89 #define FD_SETSIZE 65536
90 #else
91 #define FD_SETSIZE 1024
92 #endif /* _LP64 */
93 #elif FD_SETSIZE > 1024 && !defined(_LP64)
94 #ifdef __PRAGMA_REDEFINE_EXTNAME
95 #pragma redefine_extname select select_large_fdset
96 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
97 #pragma redefine_extname pselect pselect_large_fdset
98 #endif
99 #else /* __PRAGMA_REDEFINE_EXTNAME */
100 #define select select_large_fdset
101 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
102 #define pselect pselect_large_fdset
103 #endif
104 #endif /* __PRAGMA_REDEFINE_EXTNAME */
105 #endif /* FD_SETSIZE */
106
107 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
108 typedef long fd_mask;
109 #endif
110 typedef long fds_mask;
111
112 /*
113 * The value of _NBBY needs to be consistant with the value
114 * of NBBY in <sys/param.h>.
115 */
116 #define _NBBY 8
117 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
118 #ifndef NBBY /* number of bits per byte */
119 #define NBBY _NBBY
120 #endif
121 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
122
123 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
124 #define NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
125 #endif
126 #define FD_NFDBITS (sizeof (fds_mask) * _NBBY) /* bits per mask */
127
128 #define __howmany(__x, __y) (((__x)+((__y)-1))/(__y))
129 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
130 #ifndef howmany
131 #define howmany(x, y) (((x)+((y)-1))/(y))
132 #endif
133 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
134
135 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
136 typedef struct fd_set {
137 #else
138 typedef struct __fd_set {
139 #endif
140 long fds_bits[__howmany(FD_SETSIZE, FD_NFDBITS)];
141 } fd_set;
142
143 #define FD_SET(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] |= \
144 (1ul << ((__n) % FD_NFDBITS)))
145
146 #define FD_CLR(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] &= \
147 ~(1ul << ((__n) % FD_NFDBITS)))
148
149 #define FD_ISSET(__n, __p) (((__p)->fds_bits[(__n)/FD_NFDBITS] & \
150 (1ul << ((__n) % FD_NFDBITS))) != 0l)
151
152 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
153 #define FD_ZERO(p) bzero((p), sizeof (*(p)))
154 #else
155 #define FD_ZERO(__p) (void) memset((__p), 0, sizeof (*(__p)))
156 #endif /* _KERNEL */
157
158 #if !defined(_KERNEL) && !defined(_FAKE_KERNEL)
159 extern int select(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
160 fd_set *_RESTRICT_KYWD, struct timeval *_RESTRICT_KYWD);
161
162 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
163 extern int pselect(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
164 fd_set *_RESTRICT_KYWD, const struct timespec *_RESTRICT_KYWD,
165 const sigset_t *_RESTRICT_KYWD);
166 #endif
167
168 #endif /* _KERNEL */
169
170 #ifdef __cplusplus
171 }
172 #endif
173
174 #endif /* _SYS_SELECT_H */