[deliverable/linux.git] / include / linux / spinlock_types.h

#ifndef __LINUX_SPINLOCK_TYPES_H
#define __LINUX_SPINLOCK_TYPES_H

/*
 * include/linux/spinlock_types.h - generic spinlock type definitions
 *                                  and initializers
 *
 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
 * Released under the General Public License (GPL).
 */

#if defined(CONFIG_SMP)
# include <asm/spinlock_types.h>
#else
# include <linux/spinlock_types_up.h>
#endif

#include <linux/lockdep.h>

typedef struct raw_spinlock {
	arch_spinlock_t raw_lock;
#ifdef CONFIG_GENERIC_LOCKBREAK
	unsigned int break_lock;
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
	unsigned int magic, owner_cpu;
	void *owner;
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
	struct lockdep_map dep_map;
#endif
} raw_spinlock_t;

#define SPINLOCK_MAGIC		0xdead4ead

#define SPINLOCK_OWNER_INIT	((void *)-1L)

#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define SPIN_DEP_MAP_INIT(lockname)	.dep_map = { .name = #lockname }
#else
# define SPIN_DEP_MAP_INIT(lockname)
#endif

#ifdef CONFIG_DEBUG_SPINLOCK
# define SPIN_DEBUG_INIT(lockname)		\
	.magic = SPINLOCK_MAGIC,		\
	.owner_cpu = -1,			\
	.owner = SPINLOCK_OWNER_INIT,
#else
# define SPIN_DEBUG_INIT(lockname)
#endif

#define __RAW_SPIN_LOCK_INITIALIZER(lockname)	\
	{					\
	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
	SPIN_DEBUG_INIT(lockname)		\
	SPIN_DEP_MAP_INIT(lockname) }

#define __RAW_SPIN_LOCK_UNLOCKED(lockname)	\
	(raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)

#define DEFINE_RAW_SPINLOCK(x)	raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)

typedef struct spinlock {
	union {
		struct raw_spinlock rlock;

#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
		struct {
			u8 __padding[LOCK_PADSIZE];
			struct lockdep_map dep_map;
		};
#endif
	};
} spinlock_t;

#define __SPIN_LOCK_INITIALIZER(lockname) \
	{ { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }

#define __SPIN_LOCK_UNLOCKED(lockname) \
	(spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)

#define DEFINE_SPINLOCK(x)	spinlock_t x = __SPIN_LOCK_UNLOCKED(x)

#include <linux/rwlock_types.h>

#endif /* __LINUX_SPINLOCK_TYPES_H */
Commit	Line	Data
	1	#ifndef __LINUX_SPINLOCK_TYPES_H
	2	#define __LINUX_SPINLOCK_TYPES_H
	3
	4	/*
	5	* include/linux/spinlock_types.h - generic spinlock type definitions
	6	* and initializers
	7	*
	8	* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
	9	* Released under the General Public License (GPL).
	10	*/
	11
	12	#if defined(CONFIG_SMP)
	13	# include <asm/spinlock_types.h>
	14	#else
	15	# include <linux/spinlock_types_up.h>
	16	#endif
	17
	18	#include <linux/lockdep.h>
	19
	20	typedef struct raw_spinlock {
	21	arch_spinlock_t raw_lock;
	22	#ifdef CONFIG_GENERIC_LOCKBREAK
	23	unsigned int break_lock;
	24	#endif
	25	#ifdef CONFIG_DEBUG_SPINLOCK
	26	unsigned int magic, owner_cpu;
	27	void *owner;
	28	#endif
	29	#ifdef CONFIG_DEBUG_LOCK_ALLOC
	30	struct lockdep_map dep_map;
	31	#endif
	32	} raw_spinlock_t;
	33
	34	#define SPINLOCK_MAGIC 0xdead4ead
	35
	36	#define SPINLOCK_OWNER_INIT ((void *)-1L)
	37
	38	#ifdef CONFIG_DEBUG_LOCK_ALLOC
	39	# define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
	40	#else
	41	# define SPIN_DEP_MAP_INIT(lockname)
	42	#endif
	43
	44	#ifdef CONFIG_DEBUG_SPINLOCK
	45	# define SPIN_DEBUG_INIT(lockname) \
	46	.magic = SPINLOCK_MAGIC, \
	47	.owner_cpu = -1, \
	48	.owner = SPINLOCK_OWNER_INIT,
	49	#else
	50	# define SPIN_DEBUG_INIT(lockname)
	51	#endif
	52
	53	#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \
	54	{ \
	55	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
	56	SPIN_DEBUG_INIT(lockname) \
	57	SPIN_DEP_MAP_INIT(lockname) }
	58
	59	#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \
	60	(raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
	61
	62	#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
	63
	64	typedef struct spinlock {
	65	union {
	66	struct raw_spinlock rlock;
	67
	68	#ifdef CONFIG_DEBUG_LOCK_ALLOC
	69	# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
	70	struct {
	71	u8 __padding[LOCK_PADSIZE];
	72	struct lockdep_map dep_map;
	73	};
	74	#endif
	75	};
	76	} spinlock_t;
	77
	78	#define __SPIN_LOCK_INITIALIZER(lockname) \
	79	{ { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
	80
	81	#define __SPIN_LOCK_UNLOCKED(lockname) \
	82	(spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
	83
	84	#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
	85
	86	#include <linux/rwlock_types.h>
	87
	88	#endif /* __LINUX_SPINLOCK_TYPES_H */