#include <mdl.h>

Inheritance diagram for MDL_context_owner:

Public Member Functions
virtual void	enter_cond (mysql_cond_t cond, mysql_mutex_t mutex, const PSI_stage_info stage, PSI_stage_info old_stage, const char src_function, const char src_file, int src_line)=0
virtual void	exit_cond (const PSI_stage_info stage, const char src_function, const char *src_file, int src_line)=0
virtual int	is_killed ()=0
virtual THD *	get_thd ()=0
virtual bool	notify_shared_lock (MDL_context_owner *in_use, bool needs_thr_lock_abort)=0

Detailed Description

An interface to separate the MDL module from the THD, and the rest of the server code.

Definition at line 63 of file mdl.h.

Member Function Documentation

virtual void MDL_context_owner::enter_cond	(	mysql_cond_t *	cond,
		mysql_mutex_t *	mutex,
		const PSI_stage_info *	stage,
		PSI_stage_info *	old_stage,
		const char *	src_function,
		const char *	src_file,
		int	src_line
	)

pure virtual

Enter a condition wait. For enter_cond() / exit_cond() to work the mutex must be held before enter_cond(); this mutex is then released by exit_cond(). Usage must be: lock mutex; enter_cond(); your code; exit_cond().

Parameters

	cond	the condition to wait on
	mutex	the associated mutex
[in]	stage	the stage to enter, or NULL
[out]	old_stage	the previous stage, or NULL
	src_function	function name of the caller
	src_file	file name of the caller
	src_line	line number of the caller