service_thd_engine_lock.h File Reference

This service provides functions for storage engines to report lock related activities. More...

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Functions
void	thd_report_row_lock_wait (THD *self, THD *wait_for)
void	thd_report_lock_wait (THD *self, THD *wait_for, bool may_survive_prepare)
	Call it just when the engine find a transaction should wait another transaction to release a lock. More...

Detailed Description

This service provides functions for storage engines to report lock related activities.

Function Documentation

thd_report_lock_wait()

void thd_report_lock_wait	(	THD *	self,
		THD *	wait_for,
		bool	may_survive_prepare
	)

Call it just when the engine find a transaction should wait another transaction to release a lock.

Interface for Engine to report lock conflict. The caller should guarantee self and thd_wait_for does not be freed, while it is called.

Parameters

[in]	self	The thd session which is waiting for the lock to release
[in]	wait_for	The session which is holding the lock
[in]	may_survive_prepare	true: edge MAY remain even after wait_for session PREPAREs its transaction, false: edge CERTAINLY will be removed before or during PREPARE of transaction run by the wait_for session.

thd_report_row_lock_wait()

void thd_report_row_lock_wait	(	THD *	self,
		THD *	wait_for
	)

Deprecated:

Please use thd_report_lock_wait(self, wait_for, true) instead.

See also

thd_report_lock_wait Call it just when the engine find a transaction should wait another transaction to release a row lock.

Parameters

[in]	self	The thd session which is waiting for the lock to release
[in]	wait_for	The session which is holding the lock