1 /* $NetBSD: eventvar.h,v 1.8 2008/03/21 21:53:35 ad 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 1.4 2000/07/18 19:31:48 jlemon Exp 29 */ 30 31 /* 32 * This header is provided for the kqueue implementation and kmem 33 * grovellers, and is not expected to be used elsewhere. 34 */ 35 36 #ifndef _SYS_EVENTVAR_H_ 37 #define _SYS_EVENTVAR_H_ 38 39 #include <sys/mutex.h> 40 #include <sys/selinfo.h> 41 #include <sys/filedesc.h> 42 43 #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */ 44 #define KQ_EXTENT 256 /* linear growth by this amount */ 45 #define KFILTER_MAXNAME 256 /* maximum size of a filter name */ 46 #define KFILTER_EXTENT 8 /* grow user_kfilters by this amt */ 47 48 struct kqueue { 49 TAILQ_HEAD(kqlist, knote) kq_head; /* list of pending event */ 50 kmutex_t kq_lock; /* mutex for queue access */ 51 filedesc_t *kq_fdp; 52 struct selinfo kq_sel; 53 kcondvar_t kq_cv; 54 int kq_count; /* number of pending events */ 55 }; 56 57 #endif /* !_SYS_EVENTVAR_H_ */ 58