xnu-792.10.96.tar.gz

[apple/xnu.git] / osfmk / i386 / simple_lock.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
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 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
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 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
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 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
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 * @APPLE_LICENSE_HEADER_END@
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/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
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 */
/*
 *	File:	kern/simple_lock_types.h
 *	Author:	Avadis Tevanian, Jr., Michael Wayne Young
 *	Date:	1985
 *
 *	Simple lock data type definitions
 */
#ifdef	KERNEL_PRIVATE

#ifndef	_I386_SIMPLE_LOCK_TYPES_H_
#define	_I386_SIMPLE_LOCK_TYPES_H_

#include <mach/boolean.h>
#include <kern/kern_types.h>

#include <sys/appleapiopts.h>
#if defined(MACH_KERNEL_PRIVATE) && defined(__APPLE_API_PRIVATE)
#include <i386/hw_lock_types.h>
#include <mach_ldebug.h>
#endif

#if defined(MACH_KERNEL_PRIVATE) && defined(__APPLE_API_PRIVATE)

#if	MACH_LDEBUG
#define	USLOCK_DEBUG 1
#else
#define	USLOCK_DEBUG 0
#endif	/* USLOCK_DEBUG */

typedef struct uslock_debug {
	void			*lock_pc;	/* pc where lock operation began    */
	void			*lock_thread;	/* thread that acquired lock */
	unsigned long	duration[2];
	unsigned short	state;
	unsigned char	lock_cpu;
	void			*unlock_thread;	/* last thread to release lock */
	unsigned char	unlock_cpu;
	void			*unlock_pc;	/* pc where lock operation ended    */
} uslock_debug;

typedef struct slock {
	hw_lock_data_t	interlock;	/* must be first... see lock.c */
	unsigned short	lock_type;	/* must be second... see lock.c */
#define USLOCK_TAG	0x5353
	uslock_debug	debug;
} usimple_lock_data_t, *usimple_lock_t;

#else

typedef	struct slock {
	unsigned int	lock_data[10];
} usimple_lock_data_t, *usimple_lock_t;

#endif	/* defined(MACH_KERNEL_PRIVATE) && defined(__APPLE_API_PRIVATE) */

#define	USIMPLE_LOCK_NULL	((usimple_lock_t) 0)

#if !defined(decl_simple_lock_data)
typedef usimple_lock_data_t	*simple_lock_t;
typedef usimple_lock_data_t	simple_lock_data_t;

#define	decl_simple_lock_data(class,name) \
	class	simple_lock_data_t	name;

#endif	/* !defined(decl_simple_lock_data) */

#endif /* !_I386_SIMPLE_LOCK_TYPES_H_ */

#endif	/* KERNEL_PRIVATE */