__mutex_handoff

函数名称：Give up ownership to a specific task, when @task = NULL, this is equivalent* to a regular unlock. Sets PICKUP on a handoff, clears HANDOF, preserves* WAITERS. Provides RELEASE semantics like a regular unlock, the

函数原型：static void __mutex_handoff(struct mutex *lock, struct task_struct *task)

返回类型：void

参数：

类型	参数	名称
struct mutex *	lock
struct task_struct *	task

226

owner等于atomic_long_read( & owner)

228

循环

236

new等于owner按位与@owner: contains: 'struct task_struct *' to the current lock owner,* NULL means not owned. Since task_struct pointers are aligned at* at least L1_CACHE_BYTES, we have low bits to store extra state.

237

new或等于task

238

如果task则new或等于MUTEX_FLAG_PICKUP

241

old等于atomic_long_cmpxchg_release( & owner, owner, new)

242

如果old恒等于owner则退出

245

owner等于old

**调用者**
名称	描述
__mutex_unlock_slowpath

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