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#if !defined(_RESEARCH_SOURCE) && !defined(_PLAN9_SOURCE)
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   This header file is an extension of ANSI/POSIX
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#endif
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#ifndef __LOCK_H
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#define __LOCK_H
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#pragma lib "/$M/lib/ape/libap.a"
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#include <u.h>
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typedef struct
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{
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	long	key;
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	long	sem;
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} Lock;
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern	void	lock(Lock*);
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extern	void	unlock(Lock*);
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extern	int	canlock(Lock*);
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extern	int	tas(int*);
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#ifdef __cplusplus
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}
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#endif
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#endif