1 |
|
|
/* $OpenBSD: select.h,v 1.17 2016/09/12 19:41:20 guenther Exp $ */ |
2 |
|
|
|
3 |
|
|
/*- |
4 |
|
|
* Copyright (c) 1992, 1993 |
5 |
|
|
* The Regents of the University of California. All rights reserved. |
6 |
|
|
* |
7 |
|
|
* Redistribution and use in source and binary forms, with or without |
8 |
|
|
* modification, are permitted provided that the following conditions |
9 |
|
|
* are met: |
10 |
|
|
* 1. Redistributions of source code must retain the above copyright |
11 |
|
|
* notice, this list of conditions and the following disclaimer. |
12 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
13 |
|
|
* notice, this list of conditions and the following disclaimer in the |
14 |
|
|
* documentation and/or other materials provided with the distribution. |
15 |
|
|
* 3. Neither the name of the University nor the names of its contributors |
16 |
|
|
* may be used to endorse or promote products derived from this software |
17 |
|
|
* without specific prior written permission. |
18 |
|
|
* |
19 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
20 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
23 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 |
|
|
* SUCH DAMAGE. |
30 |
|
|
* |
31 |
|
|
* @(#)select.h 8.2 (Berkeley) 1/4/94 |
32 |
|
|
*/ |
33 |
|
|
|
34 |
|
|
#ifndef _SYS_SELECT_H_ |
35 |
|
|
#define _SYS_SELECT_H_ |
36 |
|
|
|
37 |
|
|
#include <sys/types.h> |
38 |
|
|
|
39 |
|
|
#ifndef _TIMEVAL_DECLARED |
40 |
|
|
#define _TIMEVAL_DECLARED |
41 |
|
|
struct timeval { |
42 |
|
|
time_t tv_sec; /* seconds */ |
43 |
|
|
suseconds_t tv_usec; /* and microseconds */ |
44 |
|
|
}; |
45 |
|
|
#endif |
46 |
|
|
|
47 |
|
|
#ifndef _TIMESPEC_DECLARED |
48 |
|
|
#define _TIMESPEC_DECLARED |
49 |
|
|
struct timespec { |
50 |
|
|
time_t tv_sec; /* seconds */ |
51 |
|
|
long tv_nsec; /* and nanoseconds */ |
52 |
|
|
}; |
53 |
|
|
#endif |
54 |
|
|
|
55 |
|
|
/* |
56 |
|
|
* Select uses bit masks of file descriptors in longs. These macros |
57 |
|
|
* manipulate such bit fields (the filesystem macros use chars). |
58 |
|
|
* FD_SETSIZE may be defined by the user, but the default here should |
59 |
|
|
* be enough for most uses. |
60 |
|
|
*/ |
61 |
|
|
#ifndef FD_SETSIZE |
62 |
|
|
#define FD_SETSIZE 1024 |
63 |
|
|
#endif |
64 |
|
|
|
65 |
|
|
/* |
66 |
|
|
* We don't want to pollute the namespace with select(2) internals. |
67 |
|
|
* Non-underscore versions are exposed later #if __BSD_VISIBLE |
68 |
|
|
*/ |
69 |
|
|
#define __NBBY 8 /* number of bits in a byte */ |
70 |
|
|
typedef uint32_t __fd_mask; |
71 |
|
|
#define __NFDBITS ((unsigned)(sizeof(__fd_mask) * __NBBY)) /* bits per mask */ |
72 |
|
|
#define __howmany(x, y) (((x) + ((y) - 1)) / (y)) |
73 |
|
|
|
74 |
|
|
typedef struct fd_set { |
75 |
|
|
__fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)]; |
76 |
|
|
} fd_set; |
77 |
|
|
|
78 |
|
|
static __inline void |
79 |
|
|
__fd_set(int fd, fd_set *p) |
80 |
|
|
{ |
81 |
|
|
p->fds_bits[fd / __NFDBITS] |= (1U << (fd % __NFDBITS)); |
82 |
|
|
} |
83 |
|
|
#define FD_SET(n, p) __fd_set((n), (p)) |
84 |
|
|
|
85 |
|
|
static __inline void |
86 |
|
|
__fd_clr(int fd, fd_set *p) |
87 |
|
|
{ |
88 |
|
|
p->fds_bits[fd / __NFDBITS] &= ~(1U << (fd % __NFDBITS)); |
89 |
|
|
} |
90 |
|
|
#define FD_CLR(n, p) __fd_clr((n), (p)) |
91 |
|
|
|
92 |
|
|
static __inline int |
93 |
|
|
__fd_isset(int fd, const fd_set *p) |
94 |
|
|
{ |
95 |
|
3200 |
return (p->fds_bits[fd / __NFDBITS] & (1U << (fd % __NFDBITS))); |
96 |
|
|
} |
97 |
|
|
#define FD_ISSET(n, p) __fd_isset((n), (p)) |
98 |
|
|
|
99 |
|
|
#if __BSD_VISIBLE |
100 |
|
|
#define FD_COPY(f, t) (void)(*(t) = *(f)) |
101 |
|
|
#endif |
102 |
|
|
#define FD_ZERO(p) do { \ |
103 |
|
|
fd_set *_p = (p); \ |
104 |
|
|
__size_t _n = __howmany(FD_SETSIZE, __NFDBITS); \ |
105 |
|
|
\ |
106 |
|
|
while (_n > 0) \ |
107 |
|
|
_p->fds_bits[--_n] = 0; \ |
108 |
|
|
} while (0) |
109 |
|
|
|
110 |
|
|
#if __BSD_VISIBLE |
111 |
|
|
#define NBBY __NBBY |
112 |
|
|
#define fd_mask __fd_mask |
113 |
|
|
#define NFDBITS __NFDBITS |
114 |
|
|
#ifndef howmany |
115 |
|
|
#define howmany(x, y) __howmany(x, y) |
116 |
|
|
#endif |
117 |
|
|
#endif /* __BSD_VISIBLE */ |
118 |
|
|
|
119 |
|
|
#ifndef _KERNEL |
120 |
|
|
#ifndef _SIGSET_T_DEFINED_ |
121 |
|
|
#define _SIGSET_T_DEFINED_ |
122 |
|
|
typedef unsigned int sigset_t; |
123 |
|
|
#endif |
124 |
|
|
|
125 |
|
|
#ifndef _SELECT_DEFINED_ |
126 |
|
|
#define _SELECT_DEFINED_ |
127 |
|
|
__BEGIN_DECLS |
128 |
|
|
int select(int, fd_set * __restrict, fd_set * __restrict, |
129 |
|
|
fd_set * __restrict, struct timeval * __restrict); |
130 |
|
|
int pselect(int, fd_set * __restrict, fd_set * __restrict, |
131 |
|
|
fd_set * __restrict, const struct timespec * __restrict, |
132 |
|
|
const sigset_t * __restrict); |
133 |
|
|
__END_DECLS |
134 |
|
|
#endif |
135 |
|
|
#endif /* !_KERNEL */ |
136 |
|
|
|
137 |
|
|
#endif /* !_SYS_SELECT_H_ */ |