e0cc03a09b
kqueue provides a stateful and efficient event notification framework currently supported events include socket, file, directory, fifo, pipe, tty and device changes, and monitoring of processes and signals kqueue is supported by all writable filesystems in NetBSD tree (with exception of Coda) and all device drivers supporting poll(2) based on work done by Jonathan Lemon for FreeBSD initial NetBSD port done by Luke Mewburn and Jason Thorpe
49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/* $NetBSD: eventvar.h,v 1.3 2002/10/23 09:14:56 jdolecek Exp $ */
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/*-
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* Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/sys/sys/eventvar.h,v 1.4 2000/07/18 19:31:48 jlemon Exp $
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*/
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#ifndef _SYS_EVENTVAR_H_
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#define _SYS_EVENTVAR_H_
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#define KQ_NEVENTS 8 /* minimize copy{in,out} calls */
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#define KQ_EXTENT 256 /* linear growth by this amount */
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#define KFILTER_MAXNAME 256 /* maximum size of a filter name */
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#define KFILTER_EXTENT 8 /* grow user_kfilters by this amt */
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struct kqueue {
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TAILQ_HEAD(kqlist, knote) kq_head; /* list of pending event */
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int kq_count; /* number of pending events */
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struct selinfo kq_sel;
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struct filedesc *kq_fdp;
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int kq_state;
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#define KQ_SLEEP 0x01
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struct kevent kq_kev[KQ_NEVENTS];
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};
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#endif /* !_SYS_EVENTVAR_H_ */
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