root / lab4 / .minix-src / include / sys / syncobj.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: syncobj.h,v 1.8 2009/10/21 21:12:07 rmind Exp $ */
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| 2 | |||
| 3 | /*-
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| 4 | * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to The NetBSD Foundation
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| 8 | * by Andrew Doran.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 29 | * POSSIBILITY OF SUCH DAMAGE.
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| 30 | */
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| 31 | |||
| 32 | #if !defined(_SYS_SYNCOBJ_H_)
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| 33 | #define _SYS_SYNCOBJ_H_
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| 34 | |||
| 35 | struct lwp;
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| 36 | |||
| 37 | typedef volatile const void *wchan_t; |
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| 38 | |||
| 39 | #if defined(_KERNEL)
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| 40 | |||
| 41 | /*
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| 42 | * Synchronisation object operations set.
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| 43 | */
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| 44 | typedef struct syncobj { |
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| 45 | u_int sobj_flag; |
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| 46 | void (*sobj_unsleep)(struct lwp *, bool); |
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| 47 | void (*sobj_changepri)(struct lwp *, pri_t); |
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| 48 | void (*sobj_lendpri)(struct lwp *, pri_t); |
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| 49 | struct lwp *(*sobj_owner)(wchan_t);
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| 50 | } syncobj_t; |
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| 51 | |||
| 52 | struct lwp *syncobj_noowner(wchan_t);
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| 53 | |||
| 54 | #define SOBJ_SLEEPQ_SORTED 0x01 |
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| 55 | #define SOBJ_SLEEPQ_FIFO 0x02 |
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| 56 | #define SOBJ_SLEEPQ_LIFO 0x04 |
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| 57 | |||
| 58 | extern syncobj_t sched_syncobj;
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| 59 | extern syncobj_t mutex_syncobj;
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| 60 | extern syncobj_t rw_syncobj;
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| 61 | extern syncobj_t sleep_syncobj;
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| 62 | |||
| 63 | #endif /* defined(_KERNEL) */ |
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| 64 | |||
| 65 | #endif /* !_SYS_SYNCOBJ_H_ */ |