refcount_dec_and

函数名称：_dec_and_lock - return holding spinlock if able to decrement* refcount to 0*@r: the refcount*@lock: the spinlock to be locked* Similar to atomic_dec_and_lock(), it will WARN on underflow and fail to* decrement when saturated at REFCOUNT_SATURATED

函数原型：bool refcount_dec_and_lock(refcount_t *r, spinlock_t *lock)

返回类型：bool

参数：

类型	参数	名称
refcount_t *	r
spinlock_t *	lock

146

如果_dec_not_one - decrement a refcount if it is not 1*@r: the refcount* No atomic_t counterpart, it decrements unless the value is 1, in which case* it will return false则返回:false

149

加自旋锁

150

如果非_dec_and_test - decrement a refcount and test if it is 0*@r: the refcount* Similar to atomic_dec_and_test(), it will WARN on underflow and fail to* decrement when saturated at REFCOUNT_SATURATED则

151

自旋锁解锁

152

返回:false

155

返回:true

**调用者**
名称	描述
fscrypt_put_direct_key
kref_put_lock
put_ipc_ns	put_ipc_ns - drop a reference to an ipc namespace
key_user_put	Dispose of a user structure
fsnotify_put_mark

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告