/*-
 * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$FreeBSD: src/sys/sys/eventvar.h,v 1.1.2.2 2000/07/18 21:49:12 jlemon Exp $
 */

#ifndef _SYS_EVENTVAR_H_
#define _SYS_EVENTVAR_H_

#if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
#error "This file should not be included by userland programs."
#endif

#ifndef _SYS_QUEUE_H_
#include <sys/queue.h>
#endif
#ifndef _SYS_EVENT_H_
#include <sys/event.h>
#endif
#ifndef _SYS_THREAD_H_
#include <sys/thread.h>
#endif
#ifndef _SYS_FILEDESC_H_
#include <sys/filedesc.h>
#endif


#define KQ_NEVENTS	32		/* limit stack use */
#define KQEXTENT	256		/* linear growth by this amount */

TAILQ_HEAD(kqlist, knote);

struct kqueue {
	struct kqlist	kq_knpend;
	struct kqlist	kq_knlist;
	int		kq_count;		/* number of pending events */
	struct		sigio *kq_sigio;
	struct		kqinfo kq_kqinfo;	
	struct		filedesc *kq_fdp;
	int		kq_state;
	u_int		kq_sleep_cnt;
	struct		thread *kq_regtd;
	u_long		kq_knhashmask;          /* size of knhash */
	struct		klist *kq_knhash;       /* hash table for knotes */
};

#define KQ_ASYNC	0x04
#define KQ_REGWAIT	0x08

#endif	/* !_SYS_EVENTVAR_H_ */
