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Implement compile time debug support for spinlocks.

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Simplify the atomic lock prototype, removing the lock value.

Delete the unlock prototypes that are not required.
This commit is contained in:
John Birrell 1998-06-09 08:28:49 +00:00
parent 7d24d0302f
commit f374bfcd3c
1 changed files with 24 additions and 5 deletions
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29
lib/libc/include/spinlock.h
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@ -29,7 +29,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: spinlock.h,v 1.1 1998/03/09 05:05:32 jb Exp $
* $Id: spinlock.h,v 1.2 1998/05/05 21:46:30 jb Exp $
*
* Lock definitions used in both libc and libpthread.
*
@ -38,15 +38,34 @@
#ifndef _SPINLOCK_H_
#define _SPINLOCK_H_
#include <sys/cdefs.h>
#include <sys/types.h>
/*
* Lock structure with room for debugging information.
*/
typedef struct {
volatile long access_lock;
volatile long lock_owner;
volatile char *fname;
volatile int lineno;
} spinlock_t;
#define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 }
#define _SPINUNLOCK(_lck) (_lck)->access_lock = 0
#ifdef _LOCK_DEBUG
#define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__)
#else
#define _SPINLOCK(_lck) _spinlock(_lck)
#endif
/*
* Thread function prototype definitions:
*/
__BEGIN_DECLS
long _atomic_lock __P((volatile long *, long));
long _atomic_unlock __P((volatile long *));
void _spinlock __P((volatile long *));
void _spinunlock __P((volatile long *));
long _atomic_lock __P((volatile long *));
void _spinlock __P((spinlock_t *));
void _spinlock_debug __P((spinlock_t *, char *, int));
__END_DECLS
#endif /* _SPINLOCK_H_ */