1 | /* $NetBSD: condvar.h,v 1.13 2016/04/09 16:59:43 riastradh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Andrew Doran. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _SYS_CONDVAR_H_ |
33 | #define _SYS_CONDVAR_H_ |
34 | |
35 | typedef struct kcondvar { |
36 | void *cv_opaque[3]; |
37 | } kcondvar_t; |
38 | |
39 | #ifdef _KERNEL |
40 | |
41 | struct kmutex; |
42 | |
43 | void cv_init(kcondvar_t *, const char *); |
44 | void cv_destroy(kcondvar_t *); |
45 | |
46 | void cv_wait(kcondvar_t *, struct kmutex *); |
47 | int cv_wait_sig(kcondvar_t *, struct kmutex *); |
48 | int cv_timedwait(kcondvar_t *, struct kmutex *, int); |
49 | int cv_timedwait_sig(kcondvar_t *, struct kmutex *, int); |
50 | |
51 | void cv_signal(kcondvar_t *); |
52 | void cv_broadcast(kcondvar_t *); |
53 | |
54 | bool cv_has_waiters(kcondvar_t *); |
55 | bool cv_is_valid(kcondvar_t *); |
56 | |
57 | /* The "lightning bolt", awoken once per second by the clock interrupt. */ |
58 | extern kcondvar_t lbolt; |
59 | |
60 | #endif /* _KERNEL */ |
61 | |
62 | #endif /* _SYS_CONDVAR_H_ */ |
63 | |