1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
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
32#ifndef _SYS_SELECT_H_
33#define _SYS_SELECT_H_
34
35#include <sys/cdefs.h>
36#include <sys/_types.h>
37
38#include <sys/_sigset.h>
39#include <sys/_timeval.h>
40#include <sys/timespec.h>
41
42typedef unsigned long __fd_mask;
43#if __BSD_VISIBLE
44typedef __fd_mask fd_mask;
45#endif
46
47#ifndef _SIGSET_T_DECLARED
48#define _SIGSET_T_DECLARED
49typedef __sigset_t sigset_t;
50#endif
51
52// zig patch: ssp/ssp.h header and __SSP_FORTIFY_LEVEL were added in FreeBSD 15
53#if __FreeBSD_version >= 1500500
54#if !defined(_KERNEL) && defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0
55#include <ssp/ssp.h>
56#else
57#define __SSP_FORTIFY_LEVEL 0
58#endif
59#endif
60
61/*
62 * Select uses bit masks of file descriptors in longs. These macros
63 * manipulate such bit fields (the filesystem macros use chars).
64 * FD_SETSIZE may be defined by the user, but the default here should
65 * be enough for most uses.
66 */
67#ifndef FD_SETSIZE
68#define FD_SETSIZE 1024
69#endif
70
71#define _NFDBITS (sizeof(__fd_mask) * 8) /* bits per mask */
72#if __BSD_VISIBLE
73#define NFDBITS _NFDBITS
74#endif
75
76#ifndef _howmany
77#define _howmany(x, y) (((x) + ((y) - 1)) / (y))
78#endif
79
80typedef struct fd_set {
81 __fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
82} fd_set;
83#if __BSD_VISIBLE
84#define fds_bits __fds_bits
85#endif
86
87#define __fdset_idx_(p, n) ((n) / _NFDBITS)
88#if __SSP_FORTIFY_LEVEL == 0
89#define __fdset_idx(p, n) __fdset_idx_(p, n)
90#else
91__ssp_inline unsigned long
92__fdset_idx(const fd_set *p, unsigned long idx)
93{
94 __size_t psz = __ssp_bos0(p);
95 unsigned long sidx = __fdset_idx_(p, idx);
96
97 if (idx >= FD_SETSIZE)
98 __chk_fail();
99 if (psz / sizeof(__fd_mask) < (sidx + 1))
100 __chk_fail();
101
102 return (sidx);
103}
104#endif
105
106#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
107#define FD_CLR(n, p) ((p)->__fds_bits[__fdset_idx(p, n)] &= ~__fdset_mask(n))
108#if __BSD_VISIBLE
109#define FD_COPY(f, t) (void)(*(t) = *(f))
110#endif
111#define FD_ISSET(n, p) \
112 (((p)->__fds_bits[__fdset_idx(p, n)] & __fdset_mask(n)) != 0)
113#define FD_SET(n, p) ((p)->__fds_bits[__fdset_idx(p, n)] |= __fdset_mask(n))
114#define FD_ZERO(p) do { \
115 fd_set *_p; \
116 __size_t _n; \
117 \
118 _p = (p); \
119 _n = _howmany(FD_SETSIZE, _NFDBITS); \
120 while (_n > 0) \
121 _p->__fds_bits[--_n] = 0; \
122} while (0)
123
124#ifndef _KERNEL
125
126__BEGIN_DECLS
127int pselect(int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict,
128 const struct timespec *__restrict, const sigset_t *__restrict);
129#ifndef _SELECT_DECLARED
130#define _SELECT_DECLARED
131/* XXX missing restrict type-qualifier */
132int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
133#endif
134__END_DECLS
135#endif /* !_KERNEL */
136
137#endif /* _SYS_SELECT_H_ */