atomic_fetch_add

函数名称：atomic_fetch_add_unless - add unless the number is already a given value*@v: pointer of type atomic_t*@a: the amount to add to v...*@u: ...unless v is equal to u.* Atomically adds @a to @v, so long as @v was not already @u.* Returns original value of @v

函数原型：static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)

返回类型：int

参数：

类型	参数	名称
atomic_t *	v
int	a
int	u

1086

c等于atomic_read(v)

1088

循环

1089

如果此条件成立可能性小(为编译器优化)(c == u)则退出

1091

当非atomic_try_cmpxchg(v, & c, c + a)循环

1093

返回:c

**调用者**
名称	描述
static_key_slow_try_dec
atomic_add_unless	atomic_add_unless - add unless the number is already a given value@v: pointer of type atomic_t@a: the amount to add to v...@u: ...unless v is equal to u. Atomically adds @a to @v, if @v was not already @u.* Returns true if the addition was done.
atomic_long_fetch_add_unless

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