| 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 | |