fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_SELECT_H_
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#define _SYS_SELECT_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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#include <sys/_sigset.h>
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#include <sys/_timeval.h>
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#include <sys/timespec.h>
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typedef unsigned long __fd_mask;
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#if __BSD_VISIBLE
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typedef __fd_mask fd_mask;
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#endif
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#ifndef _SIGSET_T_DECLARED
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#define _SIGSET_T_DECLARED
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typedef __sigset_t sigset_t;
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#endif
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/*
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* Select uses bit masks of file descriptors in longs. These macros
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* manipulate such bit fields (the filesystem macros use chars).
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* FD_SETSIZE may be defined by the user, but the default here should
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* be enough for most uses.
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*/
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 1024
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#endif
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#define _NFDBITS (sizeof(__fd_mask) * 8) /* bits per mask */
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#if __BSD_VISIBLE
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#define NFDBITS _NFDBITS
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#endif
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#ifndef _howmany
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#define _howmany(x, y) (((x) + ((y) - 1)) / (y))
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#endif
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typedef struct fd_set {
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__fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
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} fd_set;
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#if __BSD_VISIBLE
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#define fds_bits __fds_bits
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#endif
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#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
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#define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n))
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#if __BSD_VISIBLE
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#define FD_COPY(f, t) (void)(*(t) = *(f))
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#endif
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#define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0)
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#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
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#define FD_ZERO(p) do { \
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fd_set *_p; \
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__size_t _n; \
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\
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_p = (p); \
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_n = _howmany(FD_SETSIZE, _NFDBITS); \
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while (_n > 0) \
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_p->__fds_bits[--_n] = 0; \
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} while (0)
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#ifndef _KERNEL
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__BEGIN_DECLS
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int pselect(int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict,
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const struct timespec *__restrict, const sigset_t *__restrict);
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#ifndef _SELECT_DECLARED
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#define _SELECT_DECLARED
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/* XXX missing restrict type-qualifier */
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int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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#endif
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* _SYS_SELECT_H_ */
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