109 lines
3.4 KiB
C
109 lines
3.4 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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* 4. 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 1024U
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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))
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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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