root / lab4 / .minix-src / include / sys / condvar.h @ 14
History | View | Annotate | Download (2.21 KB)
| 1 | 13 | up20180614 | /* $NetBSD: condvar.h,v 1.12 2009/12/05 22:38:19 pooka 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 | #include <sys/mutex.h> |
||
| 36 | |||
| 37 | typedef struct kcondvar { |
||
| 38 | void *cv_opaque[3]; |
||
| 39 | } kcondvar_t; |
||
| 40 | |||
| 41 | #ifdef _KERNEL
|
||
| 42 | |||
| 43 | void cv_init(kcondvar_t *, const char *); |
||
| 44 | void cv_destroy(kcondvar_t *);
|
||
| 45 | |||
| 46 | void cv_wait(kcondvar_t *, kmutex_t *);
|
||
| 47 | int cv_wait_sig(kcondvar_t *, kmutex_t *);
|
||
| 48 | int cv_timedwait(kcondvar_t *, kmutex_t *, int); |
||
| 49 | int cv_timedwait_sig(kcondvar_t *, kmutex_t *, 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_ */ |