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kernel add
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#ifndef __LINUX_RWLOCK_RT_H
#define __LINUX_RWLOCK_RT_H
#ifndef __LINUX_SPINLOCK_H
#error Do not include directly. Use spinlock.h
#endif
#define rwlock_init(rwl) \
do { \
static struct lock_class_key __key; \
\
rt_mutex_init(&(rwl)->lock); \
__rt_rwlock_init(rwl, #rwl, &__key); \
} while (0)
extern void __lockfunc rt_write_lock(rwlock_t *rwlock);
extern void __lockfunc rt_read_lock(rwlock_t *rwlock);
extern int __lockfunc rt_write_trylock(rwlock_t *rwlock);
extern int __lockfunc rt_write_trylock_irqsave(rwlock_t *trylock, unsigned long *flags);
extern int __lockfunc rt_read_trylock(rwlock_t *rwlock);
extern void __lockfunc rt_write_unlock(rwlock_t *rwlock);
extern void __lockfunc rt_read_unlock(rwlock_t *rwlock);
extern unsigned long __lockfunc rt_write_lock_irqsave(rwlock_t *rwlock);
extern unsigned long __lockfunc rt_read_lock_irqsave(rwlock_t *rwlock);
extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key *key);
#define read_trylock(lock) __cond_lock(lock, rt_read_trylock(lock))
#define write_trylock(lock) __cond_lock(lock, rt_write_trylock(lock))
#define write_trylock_irqsave(lock, flags) \
__cond_lock(lock, rt_write_trylock_irqsave(lock, &flags))
#define read_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = rt_read_lock_irqsave(lock); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = rt_write_lock_irqsave(lock); \
} while (0)
#define read_lock(lock) rt_read_lock(lock)
#define read_lock_bh(lock) \
do { \
local_bh_disable(); \
rt_read_lock(lock); \
} while (0)
#define read_lock_irq(lock) read_lock(lock)
#define write_lock(lock) rt_write_lock(lock)
#define write_lock_bh(lock) \
do { \
local_bh_disable(); \
rt_write_lock(lock); \
} while (0)
#define write_lock_irq(lock) write_lock(lock)
#define read_unlock(lock) rt_read_unlock(lock)
#define read_unlock_bh(lock) \
do { \
rt_read_unlock(lock); \
local_bh_enable(); \
} while (0)
#define read_unlock_irq(lock) read_unlock(lock)
#define write_unlock(lock) rt_write_unlock(lock)
#define write_unlock_bh(lock) \
do { \
rt_write_unlock(lock); \
local_bh_enable(); \
} while (0)
#define write_unlock_irq(lock) write_unlock(lock)
#define read_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
(void) flags; \
rt_read_unlock(lock); \
} while (0)
#define write_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
(void) flags; \
rt_write_unlock(lock); \
} while (0)
#endif
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