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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_SELECT_H_
#define _SYS_SELECT_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#include <sys/_sigset.h>
#include <sys/_timeval.h>
#include <sys/timespec.h>
typedef unsigned long __fd_mask;
#if __BSD_VISIBLE
typedef __fd_mask fd_mask;
#endif
#ifndef _SIGSET_T_DECLARED
#define _SIGSET_T_DECLARED
typedef __sigset_t sigset_t;
#endif
/*
* Select uses bit masks of file descriptors in longs. These macros
* manipulate such bit fields (the filesystem macros use chars).
* FD_SETSIZE may be defined by the user, but the default here should
* be enough for most uses.
*/
#ifndef FD_SETSIZE
#define FD_SETSIZE 1024
#endif
#define _NFDBITS (sizeof(__fd_mask) * 8) /* bits per mask */
#if __BSD_VISIBLE
#define NFDBITS _NFDBITS
#endif
#ifndef _howmany
#define _howmany(x, y) (((x) + ((y) - 1)) / (y))
#endif
typedef struct fd_set {
__fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
} fd_set;
#if __BSD_VISIBLE
#define fds_bits __fds_bits
#endif
#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
#define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n))
#if __BSD_VISIBLE
#define FD_COPY(f, t) (void)(*(t) = *(f))
#endif
#define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0)
#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
#define FD_ZERO(p) do { \
fd_set *_p; \
__size_t _n; \
\
_p = (p); \
_n = _howmany(FD_SETSIZE, _NFDBITS); \
while (_n > 0) \
_p->__fds_bits[--_n] = 0; \
} while (0)
#ifndef _KERNEL
__BEGIN_DECLS
int pselect(int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict,
const struct timespec *__restrict, const sigset_t *__restrict);
#ifndef _SELECT_DECLARED
#define _SELECT_DECLARED
/* XXX missing restrict type-qualifier */
int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
#endif
__END_DECLS
#endif /* !_KERNEL */
#endif /* _SYS_SELECT_H_ */
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