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spinlock.h
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1 /*
2  * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  * must display the following acknowledgement:
15  * This product includes software developed by John Birrell.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  * may be used to endorse or promote products derived from this software
18  * without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.7 2003/11/05 18:17:30 deischen Exp $
33  *
34  * Lock definitions used in both libc and libpthread.
35  *
36  */
37 
38 #ifndef _SPINLOCK_H_
39 #define _SPINLOCK_H_
40 //#include <sys/cdefs.h>
41 #include <sys/types.h>
42 
43 /*
44  * Lock structure with room for debugging information.
45  */
46 struct _spinlock {
47  volatile long access_lock;
48  volatile long lock_owner;
49  volatile char *fname;
50  volatile int lineno;
51 };
52 typedef struct _spinlock spinlock_t;
53 
54 #define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 }
55 
56 #define _SPINUNLOCK(_lck) _spinunlock(_lck);
57 #ifdef _LOCK_DEBUG
58 #define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__)
59 #else
60 #define _SPINLOCK(_lck) _spinlock(_lck)
61 #endif
62 
63 /*
64  * Thread function prototype definitions:
65  */
67 long _atomic_lock(volatile long *);
68 void _spinlock(spinlock_t *);
69 void _spinunlock(spinlock_t *);
70 void _spinlock_debug(spinlock_t *, char *, int);
72 
73 #endif /* _SPINLOCK_H_ */
volatile char * fname
Definition: spinlock.h:49
void _spinlock(spinlock_t *)
volatile int lineno
Definition: spinlock.h:50
__BEGIN_DECLS long _atomic_lock(volatile long *)
#define __END_DECLS
Definition: wintirpc.h:63
void _spinlock_debug(spinlock_t *, char *, int)
void _spinunlock(spinlock_t *)
volatile long access_lock
Definition: spinlock.h:47
volatile long lock_owner
Definition: spinlock.h:48
#define __BEGIN_DECLS
Definition: wintirpc.h:62