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 */ 28 29 #ifndef _SYS_EVENTVAR_H_ 30 #define _SYS_EVENTVAR_H_ 31 32 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 33 #error "This file should not be included by userland programs." 34 #endif 35 36 #ifndef _SYS_QUEUE_H_ 37 #include <sys/queue.h> 38 #endif 39 #ifndef _SYS_EVENT_H_ 40 #include <sys/event.h> 41 #endif 42 #ifndef _SYS_THREAD_H_ 43 #include <sys/thread.h> 44 #endif 45 #ifndef _SYS_FILEDESC_H_ 46 #include <sys/filedesc.h> 47 #endif 48 49 50 #define KQ_NEVENTS 32 /* limit stack use */ 51 #define KQEXTENT 256 /* linear growth by this amount */ 52 53 TAILQ_HEAD(kqlist, knote); 54 55 struct kqueue { 56 struct kqlist kq_knpend; 57 struct kqlist kq_knlist; 58 int kq_count; /* number of pending events */ 59 struct sigio *kq_sigio; 60 struct kqinfo kq_kqinfo; 61 struct filedesc *kq_fdp; 62 int kq_state; 63 u_int kq_sleep_cnt; 64 struct thread *kq_regtd; 65 u_long kq_knhashmask; /* size of knhash */ 66 struct klist *kq_knhash; /* hash table for knotes */ 67 }; 68 69 #define KQ_ASYNC 0x04 70 #define KQ_REGWAIT 0x08 71 72 #endif /* !_SYS_EVENTVAR_H_ */ 73