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 * $FreeBSD$ 27 */ 28 29 #ifndef _SYS_EVENTVAR_H_ 30 #define _SYS_EVENTVAR_H_ 31 32 #ifndef _KERNEL 33 #error "no user-servicable parts inside" 34 #endif 35 36 #include <sys/_task.h> 37 38 #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */ 39 #define KQEXTENT 256 /* linear growth by this amount */ 40 41 struct kqueue { 42 struct mtx kq_lock; 43 int kq_refcnt; 44 SLIST_ENTRY(kqueue) kq_list; 45 TAILQ_HEAD(, knote) kq_head; /* list of pending event */ 46 int kq_count; /* number of pending events */ 47 struct selinfo kq_sel; 48 struct sigio *kq_sigio; 49 struct filedesc *kq_fdp; 50 int kq_state; 51 #define KQ_SEL 0x01 52 #define KQ_SLEEP 0x02 53 #define KQ_FLUXWAIT 0x04 /* waiting for a in flux kn */ 54 #define KQ_ASYNC 0x08 55 #define KQ_CLOSING 0x10 56 #define KQ_TASKSCHED 0x20 /* task scheduled */ 57 #define KQ_TASKDRAIN 0x40 /* waiting for task to drain */ 58 int kq_knlistsize; /* size of knlist */ 59 struct klist *kq_knlist; /* list of knotes */ 60 u_long kq_knhashmask; /* size of knhash */ 61 struct klist *kq_knhash; /* hash table for knotes */ 62 struct task kq_task; 63 }; 64 65 #endif /* !_SYS_EVENTVAR_H_ */ 66