sql_timer.cc File Reference

#include "sql/sql_timer.h"
#include <stddef.h>
#include <atomic>
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_macros.h"
#include "my_sys.h"
#include "my_thread_local.h"
#include "my_timer.h"
#include "mysql/components/services/bits/mysql_mutex_bits.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/service_mysql_alloc.h"
#include "sql/mysqld.h"
#include "sql/mysqld_thd_manager.h"
#include "sql/psi_memory_key.h"
#include "sql/sql_class.h"
#include "thr_mutex.h"

Classes
struct	THD_timer_info

Macros
#define	my_container_of(ptr, type, member)    ((type *)((char *)ptr - offsetof(type, member)))
	Cast a member of a structure to the structure that contains it. More...

Functions
static void	timer_callback (my_timer_t *timer)
	Timer expiration notification callback. More...
static THD_timer_info *	thd_timer_create (void)
	Allocate and initialize a thread timer object. More...
static bool	timer_notify (THD_timer_info *thd_timer)
	Notify a thread (session) that its timer has expired. More...
THD_timer_info *	thd_timer_set (THD *thd, THD_timer_info *thd_timer, unsigned long time)
	Set the time until the currently running statement is aborted. More...
static bool	reap_timer (THD_timer_info *thd_timer, bool pending)
	Reap a (possibly) pending timer object. More...
THD_timer_info *	thd_timer_reset (THD_timer_info *thd_timer)
	Deactivate the given timer. More...
void	thd_timer_destroy (THD_timer_info *thd_timer)
	Release resources allocated for a thread timer. More...

Macro Definition Documentation

my_container_of

#define my_container_of	(		ptr,
			type,
			member
	)		((type *)((char *)ptr - offsetof(type, member)))

Cast a member of a structure to the structure that contains it.

Parameters

ptr	Pointer to the member.
type	Type of the structure that contains the member.
member	Name of the member within the structure.

Function Documentation

reap_timer()

static bool reap_timer ( THD_timer_info *  thd_timer, bool  pending  )

static

Reap a (possibly) pending timer object.

Parameters

thd_timer	Thread timer object.
pending	State of the timer object. true if timer is not expired. false otherwise.

Returns

true if the timer object is unreachable.

thd_timer_create()

static THD_timer_info * thd_timer_create ( void  )

static

Allocate and initialize a thread timer object.

Returns

NULL on failure.

thd_timer_destroy()

void thd_timer_destroy

(

THD_timer_info *

thd_timer

)

Release resources allocated for a thread timer.

Parameters

thd_timer

Thread timer object.

thd_timer_reset()

THD_timer_info * thd_timer_reset

(

THD_timer_info *

thd_timer

)

Deactivate the given timer.

Parameters

thd_timer

Thread timer object.

Returns

NULL if the timer object was orphaned. Otherwise, the given timer object is returned.

thd_timer_set()

THD_timer_info * thd_timer_set	(	THD *	thd,
		THD_timer_info *	thd_timer,
		unsigned long	time
	)

Set the time until the currently running statement is aborted.

Parameters

thd	Thread (session) context.
thd_timer	Thread timer object.
time	Length of time, in milliseconds, until the currently running statement is aborted.

Returns

NULL on failure.

timer_callback()

static void timer_callback ( my_timer_t *  timer )

static

Timer expiration notification callback.

Parameters

timer

Timer (mysys) object.

Note

Invoked in a separate thread of control.

timer_notify()

static bool timer_notify ( THD_timer_info *  thd_timer )

static

Notify a thread (session) that its timer has expired.

Parameters

thd_timer

Thread timer object.

Returns

true if the object should be destroyed.