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Annotation of sys/sys/eventvar.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: eventvar.h,v 1.2 2000/11/16 20:31:30 mickey Exp $     */
                      2:
                      3: /*-
                      4:  * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
                      5:  * 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:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     17:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     18:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     26:  * SUCH DAMAGE.
                     27:  *
                     28:  *     $FreeBSD: src/sys/sys/eventvar.h,v 1.3 2000/05/26 02:06:54 jake Exp $
                     29:  */
                     30:
                     31: #ifndef _SYS_EVENTVAR_H_
                     32: #define _SYS_EVENTVAR_H_
                     33:
                     34: #define KQ_NEVENTS     8               /* minimize copy{in,out} calls */
                     35: #define KQEXTENT       256             /* linear growth by this amount */
                     36:
                     37: struct kqueue {
                     38:        TAILQ_HEAD(kqlist, knote) kq_head;      /* list of pending event */
                     39:        int             kq_count;               /* number of pending events */
                     40:        struct          selinfo kq_sel;
                     41:        struct          filedesc *kq_fdp;
                     42:        int             kq_state;
                     43: #define KQ_SEL         0x01
                     44: #define KQ_SLEEP       0x02
                     45:        struct          kevent kq_kev[KQ_NEVENTS];
                     46: };
                     47:
                     48: #endif /* !_SYS_EVENTVAR_H_ */