199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 1992, 1993
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The Regents of the University of California. All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 4. Neither the name of the University nor the names of its contributors
199767f8919635c4928607450d9e0abb932109ceToomas Soome * may be used to endorse or promote products derived from this software
199767f8919635c4928607450d9e0abb932109ceToomas Soome * without specific prior written permission.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Select uses bit masks of file descriptors in longs. These macros
199767f8919635c4928607450d9e0abb932109ceToomas Soome * manipulate such bit fields (the filesystem macros use chars).
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FD_SETSIZE may be defined by the user, but the default here should
199767f8919635c4928607450d9e0abb932109ceToomas Soome * be enough for most uses.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define _NFDBITS (sizeof(__fd_mask) * 8) /* bits per mask */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define _howmany(x, y) (((x) + ((y) - 1)) / (y))
199767f8919635c4928607450d9e0abb932109ceToomas Soome __fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n))
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0)
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
199767f8919635c4928607450d9e0abb932109ceToomas Soome while (_n > 0) \
199767f8919635c4928607450d9e0abb932109ceToomas Soomeint pselect(int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict,
199767f8919635c4928607450d9e0abb932109ceToomas Soome const struct timespec *__restrict, const sigset_t *__restrict);
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* XXX missing restrict type-qualifier */
199767f8919635c4928607450d9e0abb932109ceToomas Soomeint select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#endif /* !_KERNEL */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#endif /* _SYS_SELECT_H_ */