[apple/xnu.git] / osfmk / kern / locks.h

/*
 * Copyright (c) 2003-2007 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifndef _KERN_LOCKS_H_
#define _KERN_LOCKS_H_

#include	<sys/cdefs.h>
#include	<sys/appleapiopts.h>
#include	<mach/boolean.h>
#include	<mach/mach_types.h>
#include	<kern/kern_types.h>
#include	<machine/locks.h>

#ifdef	MACH_KERNEL_PRIVATE
#include	<kern/queue.h>

extern void				lck_mod_init(
								void) __attribute__((section("__TEXT, initcode")));

typedef	unsigned int	lck_type_t;

#define	LCK_TYPE_SPIN	1
#define	LCK_TYPE_MTX	2
#define	LCK_TYPE_RW	3

#endif

typedef	unsigned int		lck_sleep_action_t;

#define	LCK_SLEEP_DEFAULT	0x00	/* Release the lock while waiting for the event, then reclaim */
									/* RW locks are returned in the same mode */
#define	LCK_SLEEP_UNLOCK	0x01	/* Release the lock and return unheld */
#define	LCK_SLEEP_SHARED	0x02	/* Reclaim the lock in shared mode (RW only) */
#define	LCK_SLEEP_EXCLUSIVE	0x04	/* Reclaim the lock in exclusive mode (RW only) */
#define	LCK_SLEEP_SPIN		0x08	/* Reclaim the lock in spin mode (mutex only) */

#define	LCK_SLEEP_MASK		0x0f	/* Valid actions */

#ifdef	MACH_KERNEL_PRIVATE

typedef struct {
	uint64_t			lck_grp_spin_util_cnt;
	uint64_t			lck_grp_spin_held_cnt;
	uint64_t			lck_grp_spin_miss_cnt;
	uint64_t			lck_grp_spin_held_max;
	uint64_t			lck_grp_spin_held_cum;
} lck_grp_spin_stat_t;

typedef struct {
	uint64_t			lck_grp_mtx_util_cnt;
	/* On x86, this is used as the "direct wait" count */
	uint64_t			lck_grp_mtx_held_cnt;
	uint64_t			lck_grp_mtx_miss_cnt;
	uint64_t			lck_grp_mtx_wait_cnt;
	/* Rest currently unused */
	uint64_t			lck_grp_mtx_held_max;
	uint64_t			lck_grp_mtx_held_cum;
	uint64_t			lck_grp_mtx_wait_max;
	uint64_t			lck_grp_mtx_wait_cum;
} lck_grp_mtx_stat_t;

typedef struct {
	uint64_t			lck_grp_rw_util_cnt;
	uint64_t			lck_grp_rw_held_cnt;
	uint64_t			lck_grp_rw_miss_cnt;
	uint64_t			lck_grp_rw_wait_cnt;
	uint64_t			lck_grp_rw_held_max;
	uint64_t			lck_grp_rw_held_cum;
	uint64_t			lck_grp_rw_wait_max;
	uint64_t			lck_grp_rw_wait_cum;
} lck_grp_rw_stat_t;

typedef	struct _lck_grp_stat_ {
	lck_grp_spin_stat_t	lck_grp_spin_stat;
	lck_grp_mtx_stat_t	lck_grp_mtx_stat;
	lck_grp_rw_stat_t	lck_grp_rw_stat;
} lck_grp_stat_t;

#define	LCK_GRP_MAX_NAME	64

typedef	struct _lck_grp_ {
	queue_chain_t		lck_grp_link;
	uint32_t		lck_grp_refcnt;
	uint32_t		lck_grp_spincnt;
	uint32_t		lck_grp_mtxcnt;
	uint32_t		lck_grp_rwcnt;
	uint32_t		lck_grp_attr;
	char			lck_grp_name[LCK_GRP_MAX_NAME];
	lck_grp_stat_t		lck_grp_stat;
} lck_grp_t;

#define LCK_GRP_NULL	(lck_grp_t *)0

#else
typedef struct __lck_grp__ lck_grp_t;
#endif

#ifdef	MACH_KERNEL_PRIVATE
typedef	struct _lck_grp_attr_ {
	uint32_t	grp_attr_val;
} lck_grp_attr_t;

extern lck_grp_attr_t  LockDefaultGroupAttr;

#define LCK_GRP_ATTR_STAT	0x1

#else
typedef struct __lck_grp_attr__ lck_grp_attr_t;
#endif

#define LCK_GRP_ATTR_NULL	(lck_grp_attr_t *)0

__BEGIN_DECLS

extern	lck_grp_attr_t	*lck_grp_attr_alloc_init(
									void);

extern	void			lck_grp_attr_setdefault(
									lck_grp_attr_t	*attr);

extern	void			lck_grp_attr_setstat(
									lck_grp_attr_t  *attr);

extern	void			lck_grp_attr_free(
									lck_grp_attr_t	*attr);

extern	lck_grp_t		*lck_grp_alloc_init(
									const char*		grp_name,
									lck_grp_attr_t	*attr);

__END_DECLS

#ifdef	MACH_KERNEL_PRIVATE
extern	void			lck_grp_init(
									lck_grp_t		*grp,
									const char*		grp_name,
									lck_grp_attr_t	*attr);

extern	void			lck_grp_reference(
									lck_grp_t		*grp);

extern	void			lck_grp_deallocate(
									lck_grp_t		 *grp);

extern	void			lck_grp_lckcnt_incr(
									lck_grp_t		*grp,
									lck_type_t		lck_type);

extern	void			lck_grp_lckcnt_decr(
									lck_grp_t		*grp,
									lck_type_t		lck_type);
#endif

__BEGIN_DECLS

extern void				lck_grp_free(
									lck_grp_t		*grp);

__END_DECLS

#ifdef	MACH_KERNEL_PRIVATE
typedef	struct _lck_attr_ {
	unsigned int	lck_attr_val;
} lck_attr_t;

extern lck_attr_t      LockDefaultLckAttr;

#define LCK_ATTR_NONE		0

#define	LCK_ATTR_DEBUG				0x00000001
#define	LCK_ATTR_RW_SHARED_PRIORITY	0x00010000

#else
typedef struct __lck_attr__ lck_attr_t;
#endif

#define LCK_ATTR_NULL (lck_attr_t *)0

__BEGIN_DECLS

extern	lck_attr_t		*lck_attr_alloc_init(
									void);

extern	void			lck_attr_setdefault(
									lck_attr_t		*attr);

extern	void			lck_attr_setdebug(
									lck_attr_t		*attr);

extern	void			lck_attr_cleardebug(
									lck_attr_t		*attr);

#ifdef	XNU_KERNEL_PRIVATE
extern	void			lck_attr_rw_shared_priority(
									lck_attr_t		*attr);
#endif

extern	void			lck_attr_free(
									lck_attr_t		*attr);

#define decl_lck_spin_data(class,name)     class lck_spin_t name;

extern lck_spin_t		*lck_spin_alloc_init(
									lck_grp_t		*grp,
									lck_attr_t		*attr);

extern void				lck_spin_init(
									lck_spin_t		*lck, 
									lck_grp_t		*grp,
									lck_attr_t		*attr);

extern void				lck_spin_lock(
									lck_spin_t		*lck);

extern void				lck_spin_unlock(
									lck_spin_t		*lck);

extern void				lck_spin_destroy(
									lck_spin_t		*lck,
									lck_grp_t		*grp);

extern void				lck_spin_free(
									lck_spin_t		*lck,
									lck_grp_t		*grp);

extern wait_result_t	lck_spin_sleep(
									lck_spin_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible);

extern wait_result_t	lck_spin_sleep_deadline(
									lck_spin_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible,
									uint64_t			deadline);

#ifdef	KERNEL_PRIVATE

extern boolean_t		lck_spin_try_lock(
									lck_spin_t		*lck);

struct _lck_mtx_ext_;
extern void lck_mtx_init_ext(lck_mtx_t *lck, struct _lck_mtx_ext_ *lck_ext,
    lck_grp_t *grp, lck_attr_t *attr);

#endif


#define decl_lck_mtx_data(class,name)     class lck_mtx_t name;

extern lck_mtx_t		*lck_mtx_alloc_init(
									lck_grp_t		*grp,
									lck_attr_t		*attr);

extern void				lck_mtx_init(
									lck_mtx_t		*lck, 
									lck_grp_t		*grp,
									lck_attr_t		*attr);
extern void				lck_mtx_lock(
									lck_mtx_t		*lck);

#if	defined(__i386__)
extern void	lck_mtx_unlock(lck_mtx_t		*lck) __DARWIN10_ALIAS(lck_mtx_unlock);
#else
extern void				lck_mtx_unlock(
									lck_mtx_t		*lck);
#endif	/* __i386__ */
extern void				lck_mtx_destroy(
									lck_mtx_t		*lck,
									lck_grp_t		*grp);

extern void				lck_mtx_free(
									lck_mtx_t		*lck,
									lck_grp_t		*grp);

extern wait_result_t	lck_mtx_sleep(
									lck_mtx_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible);

extern wait_result_t	lck_mtx_sleep_deadline(
									lck_mtx_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible,
									uint64_t			deadline);

#ifdef	KERNEL_PRIVATE

extern boolean_t		lck_mtx_try_lock(
									lck_mtx_t		*lck);

extern void				mutex_pause(uint32_t);

extern void 			lck_mtx_yield (
									lck_mtx_t		*lck);

#if defined(i386) || defined(x86_64)
extern boolean_t		lck_mtx_try_lock_spin(
									lck_mtx_t		*lck);

extern void			lck_mtx_lock_spin(
									lck_mtx_t		*lck);

extern void			lck_mtx_convert_spin(
									lck_mtx_t		*lck);
#else
#define lck_mtx_try_lock_spin(l)	lck_mtx_try_lock(l)
#define	lck_mtx_lock_spin(l)		lck_mtx_lock(l)
#define	lck_mtx_convert_spin(l)		do {} while (0)
#endif

#endif	/* KERNEL_PRIVATE */

extern void				lck_mtx_assert(
									lck_mtx_t		*lck,
									unsigned int	type);

__END_DECLS

#define	LCK_MTX_ASSERT_OWNED	0x01
#define	LCK_MTX_ASSERT_NOTOWNED	0x02

#ifdef	MACH_KERNEL_PRIVATE
extern void				lck_mtx_lock_wait(
									lck_mtx_t		*lck,
									thread_t		holder);

extern int				lck_mtx_lock_acquire(
									lck_mtx_t		*lck);

extern void				lck_mtx_unlock_wakeup(
									lck_mtx_t		*lck,
									thread_t		holder);
extern void				lck_mtx_unlockspin_wakeup(
							                lck_mtx_t		*lck);

extern boolean_t		lck_mtx_ilk_unlock(
									lck_mtx_t		*lck);

#endif

#define decl_lck_rw_data(class,name)     class lck_rw_t name;

typedef unsigned int	 lck_rw_type_t;

#define	LCK_RW_TYPE_SHARED			0x01
#define	LCK_RW_TYPE_EXCLUSIVE		0x02

#ifdef XNU_KERNEL_PRIVATE
#define LCK_RW_ASSERT_SHARED	0x01
#define LCK_RW_ASSERT_EXCLUSIVE	0x02
#define LCK_RW_ASSERT_HELD	(LCK_RW_ASSERT_SHARED | LCK_RW_ASSERT_EXCLUSIVE)
#endif

__BEGIN_DECLS

extern lck_rw_t			*lck_rw_alloc_init(
									lck_grp_t		*grp,
									lck_attr_t		*attr);

extern void				lck_rw_init(
									lck_rw_t		*lck, 
									lck_grp_t		*grp,
									lck_attr_t		*attr);

extern void				lck_rw_lock(
									lck_rw_t		*lck,
									lck_rw_type_t	lck_rw_type);

extern void				lck_rw_unlock(
									lck_rw_t		*lck,
									lck_rw_type_t	lck_rw_type);

extern void				lck_rw_lock_shared(
									lck_rw_t		*lck);

extern void				lck_rw_unlock_shared(
									lck_rw_t		*lck);

extern void				lck_rw_lock_exclusive(
									lck_rw_t		*lck);

extern void				lck_rw_unlock_exclusive(
									lck_rw_t		*lck);

#ifdef	XNU_KERNEL_PRIVATE
/*
 * CAUTION
 * read-write locks do not have a concept of ownership, so lck_rw_assert()
 * merely asserts that someone is holding the lock, not necessarily the caller.
 */
extern void				lck_rw_assert(
									lck_rw_t		*lck,
									unsigned int		type);
#endif

#ifdef	KERNEL_PRIVATE

extern lck_rw_type_t	lck_rw_done(
									lck_rw_t		*lck);
#endif

extern void				lck_rw_destroy(
									lck_rw_t		*lck,
									lck_grp_t		*grp);

extern void				lck_rw_free(
									lck_rw_t		*lck,
									lck_grp_t		*grp);

extern wait_result_t	lck_rw_sleep(
									lck_rw_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible);

extern wait_result_t	lck_rw_sleep_deadline(
									lck_rw_t			*lck,
									lck_sleep_action_t	lck_sleep_action,
									event_t				event,
									wait_interrupt_t	interruptible,
									uint64_t			deadline);

extern boolean_t		lck_rw_lock_shared_to_exclusive(
									lck_rw_t		*lck);

extern void				lck_rw_lock_exclusive_to_shared(
									lck_rw_t		*lck);

extern boolean_t		lck_rw_try_lock(
									lck_rw_t		*lck,
									lck_rw_type_t	lck_rw_type);

#ifdef	KERNEL_PRIVATE

extern boolean_t		lck_rw_try_lock_shared(
									lck_rw_t		*lck);

extern boolean_t		lck_rw_try_lock_exclusive(
									lck_rw_t		*lck);
#endif

__END_DECLS

#endif /* _KERN_LOCKS_H_ */
Commit	Line	Data
91447636	1	/*
2d21ac55	2	* Copyright (c) 2003-2007 Apple Inc. All rights reserved.
91447636	3	*
2d21ac55 A	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
91447636 A	27	*/
	28
	29	#ifndef _KERN_LOCKS_H_
	30	#define _KERN_LOCKS_H_
	31
	32	#include <sys/cdefs.h>
	33	#include <sys/appleapiopts.h>
	34	#include <mach/boolean.h>
	35	#include <mach/mach_types.h>
	36	#include <kern/kern_types.h>
	37	#include <machine/locks.h>
	38
	39	#ifdef MACH_KERNEL_PRIVATE
	40	#include <kern/queue.h>
	41
	42	extern void lck_mod_init(
2d21ac55	43	void) __attribute__((section("__TEXT, initcode")));
91447636 A	44
	45	typedef unsigned int lck_type_t;
	46
	47	#define LCK_TYPE_SPIN 1
	48	#define LCK_TYPE_MTX 2
2d21ac55	49	#define LCK_TYPE_RW 3
91447636 A	50
	51	#endif
	52
	53	typedef unsigned int lck_sleep_action_t;
	54
	55	#define LCK_SLEEP_DEFAULT 0x00 /* Release the lock while waiting for the event, then reclaim */
	56	/* RW locks are returned in the same mode */
	57	#define LCK_SLEEP_UNLOCK 0x01 /* Release the lock and return unheld */
	58	#define LCK_SLEEP_SHARED 0x02 /* Reclaim the lock in shared mode (RW only) */
	59	#define LCK_SLEEP_EXCLUSIVE 0x04 /* Reclaim the lock in exclusive mode (RW only) */
b0d623f7	60	#define LCK_SLEEP_SPIN 0x08 /* Reclaim the lock in spin mode (mutex only) */
91447636	61
b0d623f7	62	#define LCK_SLEEP_MASK 0x0f /* Valid actions */
91447636 A	63
	64	#ifdef MACH_KERNEL_PRIVATE
	65
	66	typedef struct {
	67	uint64_t lck_grp_spin_util_cnt;
	68	uint64_t lck_grp_spin_held_cnt;
	69	uint64_t lck_grp_spin_miss_cnt;
	70	uint64_t lck_grp_spin_held_max;
	71	uint64_t lck_grp_spin_held_cum;
	72	} lck_grp_spin_stat_t;
	73
	74	typedef struct {
	75	uint64_t lck_grp_mtx_util_cnt;
2d21ac55	76	/* On x86, this is used as the "direct wait" count */
91447636 A	77	uint64_t lck_grp_mtx_held_cnt;
	78	uint64_t lck_grp_mtx_miss_cnt;
	79	uint64_t lck_grp_mtx_wait_cnt;
2d21ac55	80	/* Rest currently unused */
91447636 A	81	uint64_t lck_grp_mtx_held_max;
	82	uint64_t lck_grp_mtx_held_cum;
	83	uint64_t lck_grp_mtx_wait_max;
	84	uint64_t lck_grp_mtx_wait_cum;
	85	} lck_grp_mtx_stat_t;
	86
	87	typedef struct {
	88	uint64_t lck_grp_rw_util_cnt;
	89	uint64_t lck_grp_rw_held_cnt;
	90	uint64_t lck_grp_rw_miss_cnt;
	91	uint64_t lck_grp_rw_wait_cnt;
	92	uint64_t lck_grp_rw_held_max;
	93	uint64_t lck_grp_rw_held_cum;
	94	uint64_t lck_grp_rw_wait_max;
	95	uint64_t lck_grp_rw_wait_cum;
	96	} lck_grp_rw_stat_t;
	97
	98	typedef struct _lck_grp_stat_ {
	99	lck_grp_spin_stat_t lck_grp_spin_stat;
	100	lck_grp_mtx_stat_t lck_grp_mtx_stat;
	101	lck_grp_rw_stat_t lck_grp_rw_stat;
	102	} lck_grp_stat_t;
	103
	104	#define LCK_GRP_MAX_NAME 64
	105
	106	typedef struct _lck_grp_ {
	107	queue_chain_t lck_grp_link;
b0d623f7 A	108	uint32_t lck_grp_refcnt;
	109	uint32_t lck_grp_spincnt;
	110	uint32_t lck_grp_mtxcnt;
	111	uint32_t lck_grp_rwcnt;
	112	uint32_t lck_grp_attr;
2d21ac55	113	char lck_grp_name[LCK_GRP_MAX_NAME];
91447636 A	114	lck_grp_stat_t lck_grp_stat;
	115	} lck_grp_t;
	116
	117	#define LCK_GRP_NULL (lck_grp_t *)0
	118
	119	#else
	120	typedef struct __lck_grp__ lck_grp_t;
	121	#endif
	122
	123	#ifdef MACH_KERNEL_PRIVATE
	124	typedef struct _lck_grp_attr_ {
b0d623f7	125	uint32_t grp_attr_val;
91447636 A	126	} lck_grp_attr_t;
	127
	128	extern lck_grp_attr_t LockDefaultGroupAttr;
	129
	130	#define LCK_GRP_ATTR_STAT 0x1
	131
	132	#else
	133	typedef struct __lck_grp_attr__ lck_grp_attr_t;
	134	#endif
	135
	136	#define LCK_GRP_ATTR_NULL (lck_grp_attr_t *)0
	137
	138	__BEGIN_DECLS
	139
	140	extern lck_grp_attr_t *lck_grp_attr_alloc_init(
	141	void);
	142
	143	extern void lck_grp_attr_setdefault(
	144	lck_grp_attr_t *attr);
	145
	146	extern void lck_grp_attr_setstat(
	147	lck_grp_attr_t *attr);
	148
	149	extern void lck_grp_attr_free(
	150	lck_grp_attr_t *attr);
	151
	152	extern lck_grp_t *lck_grp_alloc_init(
	153	const char* grp_name,
	154	lck_grp_attr_t *attr);
	155
	156	__END_DECLS
	157
	158	#ifdef MACH_KERNEL_PRIVATE
	159	extern void lck_grp_init(
	160	lck_grp_t *grp,
	161	const char* grp_name,
	162	lck_grp_attr_t *attr);
	163
	164	extern void lck_grp_reference(
	165	lck_grp_t *grp);
	166
	167	extern void lck_grp_deallocate(
	168	lck_grp_t *grp);
	169
	170	extern void lck_grp_lckcnt_incr(
	171	lck_grp_t *grp,
	172	lck_type_t lck_type);
	173
	174	extern void lck_grp_lckcnt_decr(
	175	lck_grp_t *grp,
	176	lck_type_t lck_type);
	177	#endif
	178
	179	__BEGIN_DECLS
	180
	181	extern void lck_grp_free(
	182	lck_grp_t *grp);
	183
	184	__END_DECLS
	185
	186	#ifdef MACH_KERNEL_PRIVATE
	187	typedef struct _lck_attr_ {
	188	unsigned int lck_attr_val;
	189	} lck_attr_t;
190
191	extern lck_attr_t LockDefaultLckAttr;
192
0c530ab8 A	193	#define LCK_ATTR_NONE 0
	194
	195	#define LCK_ATTR_DEBUG 0x00000001
	196	#define LCK_ATTR_RW_SHARED_PRIORITY 0x00010000
91447636 A	197
	198	#else
	199	typedef struct __lck_attr__ lck_attr_t;
	200	#endif
	201
	202	#define LCK_ATTR_NULL (lck_attr_t *)0
	203
	204	__BEGIN_DECLS
	205
	206	extern lck_attr_t *lck_attr_alloc_init(
	207	void);
	208
	209	extern void lck_attr_setdefault(
	210	lck_attr_t *attr);
	211
	212	extern void lck_attr_setdebug(
	213	lck_attr_t *attr);
	214
2d21ac55 A	215	extern void lck_attr_cleardebug(
	216	lck_attr_t *attr);
	217
0c530ab8 A	218	#ifdef XNU_KERNEL_PRIVATE
	219	extern void lck_attr_rw_shared_priority(
	220	lck_attr_t *attr);
	221	#endif
	222
91447636 A	223	extern void lck_attr_free(
	224	lck_attr_t *attr);
	225
	226	#define decl_lck_spin_data(class,name) class lck_spin_t name;
	227
	228	extern lck_spin_t *lck_spin_alloc_init(
	229	lck_grp_t *grp,
	230	lck_attr_t *attr);
	231
	232	extern void lck_spin_init(
	233	lck_spin_t *lck,
	234	lck_grp_t *grp,
	235	lck_attr_t *attr);
	236
	237	extern void lck_spin_lock(
	238	lck_spin_t *lck);
	239
	240	extern void lck_spin_unlock(
	241	lck_spin_t *lck);
	242
	243	extern void lck_spin_destroy(
	244	lck_spin_t *lck,
	245	lck_grp_t *grp);
	246
	247	extern void lck_spin_free(
	248	lck_spin_t *lck,
	249	lck_grp_t *grp);
	250
	251	extern wait_result_t lck_spin_sleep(
	252	lck_spin_t *lck,
	253	lck_sleep_action_t lck_sleep_action,
	254	event_t event,
	255	wait_interrupt_t interruptible);
	256
	257	extern wait_result_t lck_spin_sleep_deadline(
	258	lck_spin_t *lck,
	259	lck_sleep_action_t lck_sleep_action,
	260	event_t event,
	261	wait_interrupt_t interruptible,
	262	uint64_t deadline);
	263
	264	#ifdef KERNEL_PRIVATE
	265
	266	extern boolean_t lck_spin_try_lock(
	267	lck_spin_t *lck);
	268
b0d623f7 A	269	struct _lck_mtx_ext_;
	270	extern void lck_mtx_init_ext(lck_mtx_t lck, struct _lck_mtx_ext_ lck_ext,
	271	lck_grp_t grp, lck_attr_t attr);
	272
91447636 A	273	#endif
	274
	275
	276	#define decl_lck_mtx_data(class,name) class lck_mtx_t name;
	277
	278	extern lck_mtx_t *lck_mtx_alloc_init(
	279	lck_grp_t *grp,
	280	lck_attr_t *attr);
	281
	282	extern void lck_mtx_init(
	283	lck_mtx_t *lck,
	284	lck_grp_t *grp,
	285	lck_attr_t *attr);
91447636 A	286	extern void lck_mtx_lock(
	287	lck_mtx_t *lck);
	288
b0d623f7 A	289	#if defined(__i386__)
	290	extern void lck_mtx_unlock(lck_mtx_t *lck) __DARWIN10_ALIAS(lck_mtx_unlock);
	291	#else
91447636 A	292	extern void lck_mtx_unlock(
91447636 A	293	lck_mtx_t *lck);
b0d623f7	294	#endif /* __i386__ */
91447636 A	295	extern void lck_mtx_destroy(
	296	lck_mtx_t *lck,
	297	lck_grp_t *grp);
	298
	299	extern void lck_mtx_free(
	300	lck_mtx_t *lck,
	301	lck_grp_t *grp);
	302
	303	extern wait_result_t lck_mtx_sleep(
	304	lck_mtx_t *lck,
	305	lck_sleep_action_t lck_sleep_action,
	306	event_t event,
	307	wait_interrupt_t interruptible);
	308
	309	extern wait_result_t lck_mtx_sleep_deadline(
	310	lck_mtx_t *lck,
	311	lck_sleep_action_t lck_sleep_action,
	312	event_t event,
	313	wait_interrupt_t interruptible,
	314	uint64_t deadline);
	315
	316	#ifdef KERNEL_PRIVATE
	317
	318	extern boolean_t lck_mtx_try_lock(
	319	lck_mtx_t *lck);
	320
b0d623f7 A	321	extern void mutex_pause(uint32_t);
	322
	323	extern void lck_mtx_yield (
	324	lck_mtx_t *lck);
	325
	326	#if defined(i386) \|\| defined(x86_64)
2d21ac55 A	327	extern boolean_t lck_mtx_try_lock_spin(
	328	lck_mtx_t *lck);
	329
	330	extern void lck_mtx_lock_spin(
	331	lck_mtx_t *lck);
	332
	333	extern void lck_mtx_convert_spin(
	334	lck_mtx_t *lck);
	335	#else
	336	#define lck_mtx_try_lock_spin(l) lck_mtx_try_lock(l)
	337	#define lck_mtx_lock_spin(l) lck_mtx_lock(l)
	338	#define lck_mtx_convert_spin(l) do {} while (0)
	339	#endif
	340
91447636 A	341	#endif /* KERNEL_PRIVATE */
	342
	343	extern void lck_mtx_assert(
	344	lck_mtx_t *lck,
	345	unsigned int type);
	346
	347	__END_DECLS
	348
	349	#define LCK_MTX_ASSERT_OWNED 0x01
	350	#define LCK_MTX_ASSERT_NOTOWNED 0x02
	351
	352	#ifdef MACH_KERNEL_PRIVATE
	353	extern void lck_mtx_lock_wait(
	354	lck_mtx_t *lck,
	355	thread_t holder);
	356
	357	extern int lck_mtx_lock_acquire(
	358	lck_mtx_t *lck);
	359
	360	extern void lck_mtx_unlock_wakeup(
	361	lck_mtx_t *lck,
	362	thread_t holder);
2d21ac55 A	363	extern void lck_mtx_unlockspin_wakeup(
2d21ac55 A	364	lck_mtx_t *lck);
91447636 A	365
	366	extern boolean_t lck_mtx_ilk_unlock(
	367	lck_mtx_t *lck);
2d21ac55	368
91447636 A	369	#endif
	370
	371	#define decl_lck_rw_data(class,name) class lck_rw_t name;
	372
	373	typedef unsigned int lck_rw_type_t;
	374
	375	#define LCK_RW_TYPE_SHARED 0x01
	376	#define LCK_RW_TYPE_EXCLUSIVE 0x02
	377
2d21ac55 A	378	#ifdef XNU_KERNEL_PRIVATE
	379	#define LCK_RW_ASSERT_SHARED 0x01
	380	#define LCK_RW_ASSERT_EXCLUSIVE 0x02
	381	#define LCK_RW_ASSERT_HELD (LCK_RW_ASSERT_SHARED \| LCK_RW_ASSERT_EXCLUSIVE)
	382	#endif
	383
91447636 A	384	__BEGIN_DECLS
	385
	386	extern lck_rw_t *lck_rw_alloc_init(
	387	lck_grp_t *grp,
	388	lck_attr_t *attr);
	389
	390	extern void lck_rw_init(
	391	lck_rw_t *lck,
	392	lck_grp_t *grp,
	393	lck_attr_t *attr);
	394
	395	extern void lck_rw_lock(
	396	lck_rw_t *lck,
	397	lck_rw_type_t lck_rw_type);
	398
	399	extern void lck_rw_unlock(
	400	lck_rw_t *lck,
	401	lck_rw_type_t lck_rw_type);
	402
	403	extern void lck_rw_lock_shared(
	404	lck_rw_t *lck);
	405
	406	extern void lck_rw_unlock_shared(
	407	lck_rw_t *lck);
	408
	409	extern void lck_rw_lock_exclusive(
	410	lck_rw_t *lck);
	411
	412	extern void lck_rw_unlock_exclusive(
	413	lck_rw_t *lck);
	414
2d21ac55 A	415	#ifdef XNU_KERNEL_PRIVATE
	416	/*
	417	* CAUTION
	418	* read-write locks do not have a concept of ownership, so lck_rw_assert()
	419	* merely asserts that someone is holding the lock, not necessarily the caller.
	420	*/
	421	extern void lck_rw_assert(
	422	lck_rw_t *lck,
	423	unsigned int type);
	424	#endif
	425
91447636 A	426	#ifdef KERNEL_PRIVATE
	427
	428	extern lck_rw_type_t lck_rw_done(
	429	lck_rw_t *lck);
	430	#endif
	431
	432	extern void lck_rw_destroy(
	433	lck_rw_t *lck,
	434	lck_grp_t *grp);
	435
	436	extern void lck_rw_free(
	437	lck_rw_t *lck,
	438	lck_grp_t *grp);
	439
	440	extern wait_result_t lck_rw_sleep(
	441	lck_rw_t *lck,
	442	lck_sleep_action_t lck_sleep_action,
	443	event_t event,
	444	wait_interrupt_t interruptible);
	445
	446	extern wait_result_t lck_rw_sleep_deadline(
	447	lck_rw_t *lck,
	448	lck_sleep_action_t lck_sleep_action,
	449	event_t event,
	450	wait_interrupt_t interruptible,
	451	uint64_t deadline);
	452
91447636 A	453	extern boolean_t lck_rw_lock_shared_to_exclusive(
	454	lck_rw_t *lck);
	455
	456	extern void lck_rw_lock_exclusive_to_shared(
	457	lck_rw_t *lck);
	458
	459	extern boolean_t lck_rw_try_lock(
	460	lck_rw_t *lck,
	461	lck_rw_type_t lck_rw_type);
	462
2d21ac55 A	463	#ifdef KERNEL_PRIVATE
2d21ac55 A	464
91447636 A	465	extern boolean_t lck_rw_try_lock_shared(
	466	lck_rw_t *lck);
	467
	468	extern boolean_t lck_rw_try_lock_exclusive(
	469	lck_rw_t *lck);
	470	#endif
	471
	472	__END_DECLS
	473
	474	#endif /* _KERN_LOCKS_H_ */