Annotation of sys/arch/i386/include/mutex.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mutex.h,v 1.3 2005/07/18 02:43:25 fgsch Exp $ */
2:
3: /*
4: * Copyright (c) 2004 Artur Grabowski <art@openbsd.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: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. The name of the author may not be used to endorse or promote products
14: * derived from this software without specific prior written permission.
15: *
16: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27: #ifndef _I386_MUTEX_H_
28: #define _I386_MUTEX_H_
29:
30: /*
31: * XXX - we don't really need the mtx_lock field, we can use mtx_oldipl
32: * as the lock to save some space.
33: */
34: struct mutex {
35: __volatile int mtx_lock;
36: int mtx_wantipl;
37: int mtx_oldipl;
38: void *mtx_owner;
39: };
40:
41: #define MUTEX_INITIALIZER(IPL) { 0, (IPL), 0, NULL }
42:
43: #define MUTEX_ASSERT_LOCKED(mtx) do { \
44: if ((mtx)->mtx_lock != 1 || \
45: (mtx)->mtx_owner != curcpu()) \
46: panic("mutex %p not held in %s", (mtx), __func__); \
47: } while (0)
48:
49: #define MUTEX_ASSERT_UNLOCKED(mtx) do { \
50: if ((mtx)->mtx_lock == 1 && \
51: (mtx)->mtx_owner == curcpu()) \
52: panic("mutex %p held in %s", (mtx), __func__); \
53: } while (0)
54:
55: #define MUTEX_OLDIPL(mtx) (mtx)->mtx_oldipl
56:
57: #endif
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