Find_thd_query_lock Class Reference

Callback function used by Sql_cmd_explain_other_thread::execute() to find thd based on the thread id. More...

Inheritance diagram for Find_thd_query_lock:

Public Member Functions
	Find_thd_query_lock (my_thread_id value)
	~Find_thd_query_lock () override
bool	operator() (THD *thd) override
	Override this operator to provide implementation to find specific thd. More...
Public Member Functions inherited from Find_THD_Impl
virtual	~Find_THD_Impl ()=default

Private Attributes
const my_thread_id	m_id
	The thread id we are looking for. More...
THD *	m_thd
	THD we found, having this ID. More...

Detailed Description

Callback function used by Sql_cmd_explain_other_thread::execute() to find thd based on the thread id.

Note

It acquires LOCK_thd_data mutex and LOCK_query_plan mutex, when it finds matching thd. It is the responsibility of the caller to release LOCK_thd_data. We release LOCK_query_plan in the DTOR.

Constructor & Destructor Documentation

Find_thd_query_lock()

Find_thd_query_lock::Find_thd_query_lock ( my_thread_id  value )

inlineexplicit

~Find_thd_query_lock()

Find_thd_query_lock::~Find_thd_query_lock ( )

inlineoverride

Member Function Documentation

operator()()

bool Find_thd_query_lock::operator() ( THD *  thd )

inlineoverridevirtual

Override this operator to provide implementation to find specific thd.

Parameters

thd	THD of one element in global thread list

Returns

bool

Return values

true	for matching thd false otherwise

Implements Find_THD_Impl.

Member Data Documentation

m_id

const my_thread_id Find_thd_query_lock::m_id

private

The thread id we are looking for.

m_thd

THD* Find_thd_query_lock::m_thd

private

THD we found, having this ID.

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The documentation for this class was generated from the following file:

• sql/opt_explain.cc