151 строка
3.3 KiB
C
151 строка
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#ifndef __LINUX_RWLOCK_RT_H
|
|
#define __LINUX_RWLOCK_RT_H
|
|
|
|
#ifndef __LINUX_SPINLOCK_RT_H
|
|
#error Do not #include directly. Use <linux/spinlock.h>.
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
extern void __rt_rwlock_init(rwlock_t *rwlock, const char *name,
|
|
struct lock_class_key *key);
|
|
#else
|
|
static inline void __rt_rwlock_init(rwlock_t *rwlock, char *name,
|
|
struct lock_class_key *key)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#define rwlock_init(rwl) \
|
|
do { \
|
|
static struct lock_class_key __key; \
|
|
\
|
|
init_rwbase_rt(&(rwl)->rwbase); \
|
|
__rt_rwlock_init(rwl, #rwl, &__key); \
|
|
} while (0)
|
|
|
|
extern void rt_read_lock(rwlock_t *rwlock);
|
|
extern int rt_read_trylock(rwlock_t *rwlock);
|
|
extern void rt_read_unlock(rwlock_t *rwlock);
|
|
extern void rt_write_lock(rwlock_t *rwlock);
|
|
extern void rt_write_lock_nested(rwlock_t *rwlock, int subclass);
|
|
extern int rt_write_trylock(rwlock_t *rwlock);
|
|
extern void rt_write_unlock(rwlock_t *rwlock);
|
|
|
|
static __always_inline void read_lock(rwlock_t *rwlock)
|
|
{
|
|
rt_read_lock(rwlock);
|
|
}
|
|
|
|
static __always_inline void read_lock_bh(rwlock_t *rwlock)
|
|
{
|
|
local_bh_disable();
|
|
rt_read_lock(rwlock);
|
|
}
|
|
|
|
static __always_inline void read_lock_irq(rwlock_t *rwlock)
|
|
{
|
|
rt_read_lock(rwlock);
|
|
}
|
|
|
|
#define read_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
rt_read_lock(lock); \
|
|
flags = 0; \
|
|
} while (0)
|
|
|
|
#define read_trylock(lock) __cond_lock(lock, rt_read_trylock(lock))
|
|
|
|
static __always_inline void read_unlock(rwlock_t *rwlock)
|
|
{
|
|
rt_read_unlock(rwlock);
|
|
}
|
|
|
|
static __always_inline void read_unlock_bh(rwlock_t *rwlock)
|
|
{
|
|
rt_read_unlock(rwlock);
|
|
local_bh_enable();
|
|
}
|
|
|
|
static __always_inline void read_unlock_irq(rwlock_t *rwlock)
|
|
{
|
|
rt_read_unlock(rwlock);
|
|
}
|
|
|
|
static __always_inline void read_unlock_irqrestore(rwlock_t *rwlock,
|
|
unsigned long flags)
|
|
{
|
|
rt_read_unlock(rwlock);
|
|
}
|
|
|
|
static __always_inline void write_lock(rwlock_t *rwlock)
|
|
{
|
|
rt_write_lock(rwlock);
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC
|
|
static __always_inline void write_lock_nested(rwlock_t *rwlock, int subclass)
|
|
{
|
|
rt_write_lock_nested(rwlock, subclass);
|
|
}
|
|
#else
|
|
#define write_lock_nested(lock, subclass) rt_write_lock(((void)(subclass), (lock)))
|
|
#endif
|
|
|
|
static __always_inline void write_lock_bh(rwlock_t *rwlock)
|
|
{
|
|
local_bh_disable();
|
|
rt_write_lock(rwlock);
|
|
}
|
|
|
|
static __always_inline void write_lock_irq(rwlock_t *rwlock)
|
|
{
|
|
rt_write_lock(rwlock);
|
|
}
|
|
|
|
#define write_lock_irqsave(lock, flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
rt_write_lock(lock); \
|
|
flags = 0; \
|
|
} while (0)
|
|
|
|
#define write_trylock(lock) __cond_lock(lock, rt_write_trylock(lock))
|
|
|
|
#define write_trylock_irqsave(lock, flags) \
|
|
({ \
|
|
int __locked; \
|
|
\
|
|
typecheck(unsigned long, flags); \
|
|
flags = 0; \
|
|
__locked = write_trylock(lock); \
|
|
__locked; \
|
|
})
|
|
|
|
static __always_inline void write_unlock(rwlock_t *rwlock)
|
|
{
|
|
rt_write_unlock(rwlock);
|
|
}
|
|
|
|
static __always_inline void write_unlock_bh(rwlock_t *rwlock)
|
|
{
|
|
rt_write_unlock(rwlock);
|
|
local_bh_enable();
|
|
}
|
|
|
|
static __always_inline void write_unlock_irq(rwlock_t *rwlock)
|
|
{
|
|
rt_write_unlock(rwlock);
|
|
}
|
|
|
|
static __always_inline void write_unlock_irqrestore(rwlock_t *rwlock,
|
|
unsigned long flags)
|
|
{
|
|
rt_write_unlock(rwlock);
|
|
}
|
|
|
|
#define rwlock_is_contended(lock) (((void)(lock), 0))
|
|
|
|
#endif /* __LINUX_RWLOCK_RT_H */
|