The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/select.h

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    1 /*      $NetBSD: select.h,v 1.21.2.1 2005/03/19 13:23:15 tron Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)select.h    8.2 (Berkeley) 1/4/94
   32  */
   33 
   34 #ifndef _SYS_SELECT_H_
   35 #define _SYS_SELECT_H_
   36 
   37 #include <sys/cdefs.h>
   38 #include <sys/featuretest.h>
   39 #include <sys/types.h>
   40 
   41 #ifdef _NETBSD_SOURCE
   42 #include <sys/event.h>          /* for struct klist */
   43 
   44 /*
   45  * Used to maintain information about processes that wish to be
   46  * notified when I/O becomes possible.
   47  */
   48 struct selinfo {
   49         struct klist    sel_klist;      /* knotes attached to this selinfo */
   50         pid_t           sel_pid;        /* process to be notified */
   51         uint8_t         sel_collision;  /* non-zero if a collision occurred */
   52 };
   53 #endif /* !_NETBSD_SOURCE_ */
   54 
   55 #ifdef _KERNEL
   56 #include <sys/signal.h>                 /* for sigset_t */
   57 
   58 struct lwp;
   59 struct proc;
   60 struct timeval;
   61 
   62 int     selcommon(struct lwp *, register_t *, int, fd_set *, fd_set *,
   63             fd_set *, struct timeval *, sigset_t *);
   64 void    selrecord(struct proc *selector, struct selinfo *);
   65 void    selwakeup(struct selinfo *);
   66 
   67 static __inline void
   68 selnotify(struct selinfo *sip, long knhint)
   69 {
   70 
   71         if (sip->sel_pid != 0)
   72                 selwakeup(sip);
   73         KNOTE(&sip->sel_klist, knhint);
   74 }
   75 
   76 #else /* _KERNEL */
   77 
   78 #include <sys/sigtypes.h>
   79 #include <time.h>
   80 
   81 __BEGIN_DECLS
   82 int     pselect(int, fd_set * __restrict, fd_set * __restrict,
   83             fd_set * __restrict, const struct timespec * __restrict,
   84             const sigset_t * __restrict);
   85 int     select(int, fd_set * __restrict, fd_set * __restrict,
   86             fd_set * __restrict, struct timeval * __restrict);
   87 __END_DECLS
   88 #endif /* _KERNEL */
   89 
   90 #endif /* !_SYS_SELECT_H_ */

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