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 2010 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
30 /* All Rights Reserved */
31
32 /*
33 * University Copyright- Copyright (c) 1982, 1986, 1988
34 * The Regents of the University of California
35 * All Rights Reserved
36 *
37 * University Acknowledgment- Portions of this document are derived from
38 * software developed by the University of California, Berkeley, and its
39 * contributors.
40 */
41
42 #ifndef _SYS_SELECT_H
43 #define _SYS_SELECT_H
44
45 #include <sys/feature_tests.h>
46
47 #ifndef _KERNEL
48 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
49 #include <sys/time_impl.h>
50 #endif
51 #include <sys/time.h>
52 #endif /* _KERNEL */
53
54 #ifdef __cplusplus
55 extern "C" {
56 #endif
57
58
59 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
60 /*
61 * The sigset_t type is defined in <sys/signal.h> and duplicated
62 * in <sys/ucontext.h> as a result of XPG4v2 requirements. XPG6
63 * now allows the visibility of signal.h in this header, however
64 * an order of inclusion problem occurs as a result of inclusion
65 * of <sys/select.h> in <signal.h> under certain conditions.
66 * Rather than include <sys/signal.h> here, we've duplicated
67 * the sigset_t type instead. This type is required for the XPG6
68 * introduced pselect() function also declared in this header.
69 */
70 #ifndef _SIGSET_T
71 #define _SIGSET_T
72 typedef struct { /* signal set type */
73 unsigned int __sigbits[4];
74 } sigset_t;
75 #endif /* _SIGSET_T */
76
77 #endif /* #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
78
79 /*
80 * Select uses bit masks of file descriptors in longs.
81 * These macros manipulate such bit fields.
82 * FD_SETSIZE may be defined by the user, but the default here
83 * should be >= NOFILE (param.h).
84 */
85 #ifndef FD_SETSIZE
86 #ifdef _LP64
87 #define FD_SETSIZE 65536
88 #else
89 #define FD_SETSIZE 1024
90 #endif /* _LP64 */
91 #elif FD_SETSIZE > 1024 && !defined(_LP64)
92 #ifdef __PRAGMA_REDEFINE_EXTNAME
93 #pragma redefine_extname select select_large_fdset
94 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
95 #pragma redefine_extname pselect pselect_large_fdset
96 #endif
97 #else /* __PRAGMA_REDEFINE_EXTNAME */
98 #define select select_large_fdset
99 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
100 #define pselect pselect_large_fdset
101 #endif
102 #endif /* __PRAGMA_REDEFINE_EXTNAME */
103 #endif /* FD_SETSIZE */
104
105 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
106 typedef long fd_mask;
107 #endif
108 typedef long fds_mask;
109
110 /*
111 * The value of _NBBY needs to be consistant with the value
112 * of NBBY in <sys/param.h>.
113 */
114 #define _NBBY 8
115 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
116 #ifndef NBBY /* number of bits per byte */
117 #define NBBY _NBBY
118 #endif
119 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
120
121 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
122 #define NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
123 #endif
124 #define FD_NFDBITS (sizeof (fds_mask) * _NBBY) /* bits per mask */
125
126 #define __howmany(__x, __y) (((__x)+((__y)-1))/(__y))
127 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
128 #ifndef howmany
129 #define howmany(x, y) (((x)+((y)-1))/(y))
130 #endif
131 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
132
133 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
134 typedef struct fd_set {
135 #else
136 typedef struct __fd_set {
137 #endif
138 long fds_bits[__howmany(FD_SETSIZE, FD_NFDBITS)];
139 } fd_set;
140
141 #define FD_SET(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] |= \
142 (1ul << ((__n) % FD_NFDBITS)))
143
144 #define FD_CLR(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] &= \
145 ~(1ul << ((__n) % FD_NFDBITS)))
146
147 #define FD_ISSET(__n, __p) (((__p)->fds_bits[(__n)/FD_NFDBITS] & \
148 (1ul << ((__n) % FD_NFDBITS))) != 0l)
149
150 #ifdef _KERNEL
151 #define FD_ZERO(p) bzero((p), sizeof (*(p)))
152 #else
153 #define FD_ZERO(__p) (void) memset((__p), 0, sizeof (*(__p)))
154 #endif /* _KERNEL */
155
156 #ifndef _KERNEL
157 extern int select(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
158 fd_set *_RESTRICT_KYWD, struct timeval *_RESTRICT_KYWD);
159
160 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
161 extern int pselect(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
162 fd_set *_RESTRICT_KYWD, const struct timespec *_RESTRICT_KYWD,
163 const sigset_t *_RESTRICT_KYWD);
164 #endif
165
166 #endif /* _KERNEL */
167
168 #ifdef __cplusplus
169 }
170 #endif
171
172 #endif /* _SYS_SELECT_H */