11541Srgrimes/*- 21541Srgrimes * Copyright (c) 1992, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 2950477Speter * $FreeBSD$ 301541Srgrimes */ 311541Srgrimes 321541Srgrimes#ifndef _SYS_SELECT_H_ 331541Srgrimes#define _SYS_SELECT_H_ 341541Srgrimes 3598272Swollman#include <sys/cdefs.h> 3698272Swollman#include <sys/_types.h> 3798272Swollman 3898302Swollman#include <sys/_sigset.h> 39108478Smike#include <sys/_timeval.h> 4098272Swollman#include <sys/timespec.h> 4198272Swollman 42103867Smiketypedef unsigned long __fd_mask; 43103867Smike#if __BSD_VISIBLE 44103867Smiketypedef __fd_mask fd_mask; 45103867Smike#endif 46103867Smike 47104504Smike#ifndef _SIGSET_T_DECLARED 48104504Smike#define _SIGSET_T_DECLARED 49104504Smiketypedef __sigset_t sigset_t; 50104504Smike#endif 51104504Smike 52103867Smike/* 53103867Smike * Select uses bit masks of file descriptors in longs. These macros 54103867Smike * manipulate such bit fields (the filesystem macros use chars). 55103867Smike * FD_SETSIZE may be defined by the user, but the default here should 56103867Smike * be enough for most uses. 57103867Smike */ 58103867Smike#ifndef FD_SETSIZE 59103867Smike#define FD_SETSIZE 1024U 60103867Smike#endif 61103867Smike 62103867Smike#define _NFDBITS (sizeof(__fd_mask) * 8) /* bits per mask */ 63103867Smike#if __BSD_VISIBLE 64103867Smike#define NFDBITS _NFDBITS 65103867Smike#endif 66103867Smike 67103867Smike#ifndef _howmany 68103867Smike#define _howmany(x, y) (((x) + ((y) - 1)) / (y)) 69103867Smike#endif 70103867Smike 71103867Smiketypedef struct fd_set { 72107019Smike __fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)]; 73103867Smike} fd_set; 74107019Smike#if __BSD_VISIBLE 75107019Smike#define fds_bits __fds_bits 76107019Smike#endif 77103867Smike 78107019Smike#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS)) 79107377Smike#define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n)) 80103867Smike#if __BSD_VISIBLE 81107019Smike#define FD_COPY(f, t) (void)(*(t) = *(f)) 82103867Smike#endif 83154090Smarcel#define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0) 84107377Smike#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n)) 85107019Smike#define FD_ZERO(p) do { \ 86107019Smike fd_set *_p; \ 87107019Smike __size_t _n; \ 88107019Smike \ 89107019Smike _p = (p); \ 90107019Smike _n = _howmany(FD_SETSIZE, _NFDBITS); \ 91107019Smike while (_n > 0) \ 92107019Smike _p->__fds_bits[--_n] = 0; \ 93107019Smike} while (0) 94103867Smike 9598272Swollman#ifndef _KERNEL 96103867Smike 9798272Swollman__BEGIN_DECLS 9898272Swollmanint pselect(int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, 9998302Swollman const struct timespec *__restrict, const sigset_t *__restrict); 100103867Smike#ifndef _SELECT_DECLARED 101103867Smike#define _SELECT_DECLARED 102103867Smike/* XXX missing restrict type-qualifier */ 103103867Smikeint select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 104103867Smike#endif 10598272Swollman__END_DECLS 10698272Swollman#endif /* !_KERNEL */ 10798272Swollman 10870650Swollman#endif /* _SYS_SELECT_H_ */ 109