1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS_EVENTVAR_H_ 32 #define _SYS_EVENTVAR_H_ 33 34 #ifndef _KERNEL 35 #error "no user-serviceable parts inside" 36 #endif 37 38 #include <sys/_task.h> 39 40 #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */ 41 #define KQEXTENT 256 /* linear growth by this amount */ 42 43 struct kqueue { 44 struct mtx kq_lock; 45 int kq_refcnt; 46 TAILQ_ENTRY(kqueue) kq_list; 47 TAILQ_HEAD(, knote) kq_head; /* list of pending event */ 48 int kq_count; /* number of pending events */ 49 struct selinfo kq_sel; 50 struct sigio *kq_sigio; 51 struct filedesc *kq_fdp; 52 int kq_state; 53 #define KQ_SEL 0x01 54 #define KQ_SLEEP 0x02 55 #define KQ_FLUXWAIT 0x04 /* waiting for a in flux kn */ 56 #define KQ_ASYNC 0x08 57 #define KQ_CLOSING 0x10 58 #define KQ_TASKSCHED 0x20 /* task scheduled */ 59 #define KQ_TASKDRAIN 0x40 /* waiting for task to drain */ 60 int kq_knlistsize; /* size of knlist */ 61 struct klist *kq_knlist; /* list of knotes */ 62 u_long kq_knhashmask; /* size of knhash */ 63 struct klist *kq_knhash; /* hash table for knotes */ 64 struct task kq_task; 65 struct ucred *kq_cred; 66 }; 67 68 #endif /* !_SYS_EVENTVAR_H_ */ 69