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 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #ifndef _SYS_SELECT_H
41 #define _SYS_SELECT_H
42
43 #include <sys/feature_tests.h>
44
45 #ifndef _KERNEL
46 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
47 #include <sys/time_impl.h>
48 #endif
49 #include <sys/time.h>
50 #endif /* _KERNEL */
51
52 #ifdef __cplusplus
53 extern "C" {
54 #endif
55
56
57 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
58 /*
59 * The sigset_t type is defined in <sys/signal.h> and duplicated
60 * in <sys/ucontext.h> as a result of XPG4v2 requirements. XPG6
61 * now allows the visibility of signal.h in this header, however
62 * an order of inclusion problem occurs as a result of inclusion
63 * of <sys/select.h> in <signal.h> under certain conditions.
64 * Rather than include <sys/signal.h> here, we've duplicated
65 * the sigset_t type instead. This type is required for the XPG6
66 * introduced pselect() function also declared in this header.
67 */
68 #ifndef _SIGSET_T
69 #define _SIGSET_T
70 typedef struct { /* signal set type */
71 unsigned int __sigbits[4];
72 } sigset_t;
73 #endif /* _SIGSET_T */
74
75 #endif /* #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
76
77 /*
78 * Select uses bit masks of file descriptors in longs.
79 * These macros manipulate such bit fields.
80 * FD_SETSIZE may be defined by the user, but the default here
81 * should be >= NOFILE (param.h).
82 */
83 #ifndef FD_SETSIZE
84 #ifdef _LP64
85 #define FD_SETSIZE 65536
86 #else
87 #define FD_SETSIZE 1024
88 #endif /* _LP64 */
89 #elif FD_SETSIZE > 1024 && !defined(_LP64)
90 #ifdef __PRAGMA_REDEFINE_EXTNAME
91 #pragma redefine_extname select select_large_fdset
92 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
93 #pragma redefine_extname pselect pselect_large_fdset
94 #endif
95 #else /* __PRAGMA_REDEFINE_EXTNAME */
96 #define select select_large_fdset
97 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
98 #define pselect pselect_large_fdset
99 #endif
100 #endif /* __PRAGMA_REDEFINE_EXTNAME */
101 #endif /* FD_SETSIZE */
102
103 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
104 typedef long fd_mask;
105 #endif
106 typedef long fds_mask;
107
108 /*
109 * The value of _NBBY needs to be consistant with the value
110 * of NBBY in <sys/param.h>.
111 */
112 #define _NBBY 8
113 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
114 #ifndef NBBY /* number of bits per byte */
115 #define NBBY _NBBY
116 #endif
117 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
118
119 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
120 #define NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
121 #endif
122 #define FD_NFDBITS (sizeof (fds_mask) * _NBBY) /* bits per mask */
123
124 #define __howmany(__x, __y) (((__x)+((__y)-1))/(__y))
125 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
126 #ifndef howmany
127 #define howmany(x, y) (((x)+((y)-1))/(y))
128 #endif
129 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
130
131 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
132 typedef struct fd_set {
133 #else
134 typedef struct __fd_set {
135 #endif
136 long fds_bits[__howmany(FD_SETSIZE, FD_NFDBITS)];
137 } fd_set;
138
139 #define FD_SET(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] |= \
140 (1ul << ((__n) % FD_NFDBITS)))
141
142 #define FD_CLR(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] &= \
143 ~(1ul << ((__n) % FD_NFDBITS)))
144
145 #define FD_ISSET(__n, __p) (((__p)->fds_bits[(__n)/FD_NFDBITS] & \
146 (1ul << ((__n) % FD_NFDBITS))) != 0l)
147
148 #ifdef _KERNEL
149 #define FD_ZERO(p) bzero((p), sizeof (*(p)))
150 #else
151 #define FD_ZERO(__p) (void) memset((__p), 0, sizeof (*(__p)))
152 #endif /* _KERNEL */
153
154 #ifndef _KERNEL
155 #ifdef __STDC__
156 extern int select(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
157 fd_set *_RESTRICT_KYWD, struct timeval *_RESTRICT_KYWD);
158
159 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
160 extern int pselect(int, fd_set *_RESTRICT_KYWD, fd_set *_RESTRICT_KYWD,
161 fd_set *_RESTRICT_KYWD, const struct timespec *_RESTRICT_KYWD,
162 const sigset_t *_RESTRICT_KYWD);
163 #endif
164
165 #else
166 extern int select();
167 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
168 extern int pselect();
169 #endif
170 #endif /* __STDC__ */
171 #endif /* _KERNEL */
172
173 #ifdef __cplusplus
174 }
175 #endif
176
177 #endif /* _SYS_SELECT_H */