sl@0: /*
sl@0:  * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 4. Neither the name of the author nor the names of any co-contributors
sl@0:  *    may be used to endorse or promote products derived from this software
sl@0:  *    without specific prior written permission.
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  *
sl@0:  * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.7 2003/11/05 18:17:30 deischen Exp $
sl@0:  *
sl@0:  * Lock definitions used in both libc and libpthread.
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #ifndef _SPINLOCK_H_
sl@0: #define _SPINLOCK_H_
sl@0: #include <sys/cdefs.h>
sl@0: #include <sys/types.h>
sl@0: 
sl@0: /*
sl@0:  * Lock structure with room for debugging information.
sl@0:  */
sl@0: struct _spinlock {
sl@0: 	volatile long	access_lock;
sl@0: 	volatile long	lock_owner;
sl@0: 	volatile char	*fname;
sl@0: 	volatile int	lineno;
sl@0: };
sl@0: typedef struct _spinlock spinlock_t;
sl@0: 
sl@0: #define	_SPINLOCK_INITIALIZER	{ 0, 0, 0, 0 }
sl@0: 
sl@0: #define _SPINUNLOCK(_lck)	_spinunlock(_lck);
sl@0: #ifdef	_LOCK_DEBUG
sl@0: #define	_SPINLOCK(_lck)		_spinlock_debug(_lck, __FILE__, __LINE__)
sl@0: #else
sl@0: #define	_SPINLOCK(_lck)		_spinlock(_lck)
sl@0: #endif
sl@0: 
sl@0: /*
sl@0:  * Thread function prototype definitions:
sl@0:  */
sl@0: __BEGIN_DECLS
sl@0: long	_atomic_lock(volatile long *);
sl@0: void	_spinlock(spinlock_t *);
sl@0: void	_spinunlock(spinlock_t *);
sl@0: void	_spinlock_debug(spinlock_t *, char *, int);
sl@0: __END_DECLS
sl@0: 
sl@0: #endif /* _SPINLOCK_H_ */