134365Sjb/*
234365Sjb * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
334365Sjb * All rights reserved.
434365Sjb *
534365Sjb * Redistribution and use in source and binary forms, with or without
634365Sjb * modification, are permitted provided that the following conditions
734365Sjb * are met:
834365Sjb * 1. Redistributions of source code must retain the above copyright
934365Sjb *    notice, this list of conditions and the following disclaimer.
1034365Sjb * 2. Redistributions in binary form must reproduce the above copyright
1134365Sjb *    notice, this list of conditions and the following disclaimer in the
1234365Sjb *    documentation and/or other materials provided with the distribution.
13165968Simp * 3. Neither the name of the author nor the names of any co-contributors
1434365Sjb *    may be used to endorse or promote products derived from this software
1534365Sjb *    without specific prior written permission.
1634365Sjb *
1734365Sjb * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
1834365Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1934365Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2034365Sjb * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2134365Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2234365Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2334365Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2434365Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2534365Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2634365Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2734365Sjb * SUCH DAMAGE.
2834365Sjb *
2950476Speter * $FreeBSD$
3034365Sjb *
3134365Sjb * Lock definitions used in both libc and libpthread.
3234365Sjb *
3334365Sjb */
3434365Sjb
3534365Sjb#ifndef _SPINLOCK_H_
3634365Sjb#define _SPINLOCK_H_
3734365Sjb#include <sys/cdefs.h>
3836803Sjb#include <sys/types.h>
3934365Sjb
4034365Sjb/*
4136803Sjb * Lock structure with room for debugging information.
4236803Sjb */
43122129Sdeischenstruct _spinlock {
4436803Sjb	volatile long	access_lock;
4536803Sjb	volatile long	lock_owner;
4636803Sjb	volatile char	*fname;
4736803Sjb	volatile int	lineno;
48122129Sdeischen};
49122129Sdeischentypedef struct _spinlock spinlock_t;
5036803Sjb
5136803Sjb#define	_SPINLOCK_INITIALIZER	{ 0, 0, 0, 0 }
5236803Sjb
53112665Sjeff#define _SPINUNLOCK(_lck)	_spinunlock(_lck);
5436803Sjb#ifdef	_LOCK_DEBUG
5536803Sjb#define	_SPINLOCK(_lck)		_spinlock_debug(_lck, __FILE__, __LINE__)
5636803Sjb#else
5736803Sjb#define	_SPINLOCK(_lck)		_spinlock(_lck)
5836803Sjb#endif
5936803Sjb
6036803Sjb/*
6134365Sjb * Thread function prototype definitions:
6234365Sjb */
6334365Sjb__BEGIN_DECLS
6492905Sobrienlong	_atomic_lock(volatile long *);
6592905Sobrienvoid	_spinlock(spinlock_t *);
66112665Sjeffvoid	_spinunlock(spinlock_t *);
6792905Sobrienvoid	_spinlock_debug(spinlock_t *, char *, int);
6834365Sjb__END_DECLS
6934365Sjb
7034365Sjb#endif /* _SPINLOCK_H_ */
71