sys/sys/eventvar.h

   1 /*-
   2  * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/sys/sys/eventvar.h,v 1.1.2.2 2000/07/18 21:49:12 jlemon Exp $
  27  *      $DragonFly: src/sys/sys/eventvar.h,v 1.3 2004/12/30 07:01:52 cpressey Exp $
  28  */
  29
  30 #ifndef _SYS_EVENTVAR_H_
  31 #define _SYS_EVENTVAR_H_
  32
  33 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
  34 #error "This file should not be included by userland programs."
  35 #endif
  36
  37 #define KQ_NEVENTS      8               /* minimize copy{in,out} calls */
  38 #define KQEXTENT        256             /* linear growth by this amount */
  39
  40 struct kqueue {
  41         TAILQ_HEAD(kqlist, knote) kq_head;      /* list of pending event */
  42         int             kq_count;               /* number of pending events */
  43         struct          selinfo kq_sel;
  44         struct          filedesc *kq_fdp;
  45         int             kq_state;
  46 #define KQ_SEL          0x01
  47 #define KQ_SLEEP        0x02
  48         struct          kevent kq_kev[KQ_NEVENTS];
  49 };
  50
  51 #endif /* !_SYS_EVENTVAR_H_ */