Mysql_thd_store_service_imp Class Reference

#include <mysql_thd_store_imp.h>

Static Public Member Functions
static mysql_service_status_t	register_slot (const char *name, free_resource_fn free_fn, mysql_thd_store_slot *slot) noexcept
	Register a slot to store data specific to a component. More...
static mysql_service_status_t	unregister_slot (mysql_thd_store_slot slot) noexcept
	Unregister a slot. More...
static mysql_service_status_t	set (THD *thd, mysql_thd_store_slot slot, void *object) noexcept
	Adds an opaque pointer to the session object. More...
static void *	get (THD *thd, mysql_thd_store_slot slot) noexcept
	Get handle to an already stored object without removing it. More...

Member Function Documentation

get()

void * Mysql_thd_store_service_imp::get ( THD *  thd, mysql_thd_store_slot  slot  )

staticnoexcept

Get handle to an already stored object without removing it.

Parameters

[in]	thd	Session handle. If NULL, current session will be used.
[in]	slot	Key used to identify the object handle

Returns

handle to the object if found, nullptr otherwise

register_slot()

mysql_service_status_t Mysql_thd_store_service_imp::register_slot ( const char *  name, free_resource_fn  free_fn, mysql_thd_store_slot *  slot  )

staticnoexcept

Register a slot to store data specific to a component.

The free_resource callback is used to free the stored pointer before thd is destroyed

Parameters

[in]	name	Implementation name
[in]	free_fn	Callback to free resource stored in the slot
[out]	slot	Key used to identify the object handle

Returns

status of registration

Return values

false	Success
true	Error. This typically means all slots are full

set()

mysql_service_status_t Mysql_thd_store_service_imp::set ( THD *  thd, mysql_thd_store_slot  slot, void *  object  )

staticnoexcept

Adds an opaque pointer to the session object.

Parameters

[in]	thd	Session handle. If NULL, current session will be used.
[in]	slot	Key used to identify the object handle
[in]	object	Handle of the object being stored. If NULL, it will be considered removal.

Returns

Status of the operation

Return values

false	Success
true	Error

unregister_slot()

mysql_service_status_t Mysql_thd_store_service_imp::unregister_slot ( mysql_thd_store_slot  slot )

staticnoexcept

Unregister a slot.

Parameters

[in,out]

slot

Key allocated to component

Returns

status of operation

Return values

false	Success
true	Error

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

• sql/server_component/mysql_thd_store_imp.h
• sql/server_component/mysql_thd_store_imp.cc