lock0wait.cc File Reference

#include "srv0mon.h"
#include "que0que.h"
#include "lock0lock.h"
#include "row0mysql.h"
#include "srv0start.h"
#include "ha_prototypes.h"
#include "lock0priv.h"

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Functions
UNIV_INTERN void	lock_wait_suspend_thread (que_thr_t *thr)
UNIV_INTERN void	lock_wait_release_thread_if_suspended (que_thr_t *thr)
UNIV_INTERN os_thread_ret_t DECLARE_THREAD()	lock_wait_timeout_thread (void *arg __attribute__((unused)))

Detailed Description

The transaction lock system

Created 25/5/2010 Sunny Bains

Definition in file lock0wait.cc.

Function Documentation

UNIV_INTERN void lock_wait_release_thread_if_suspended

(

que_thr_t *

thr

)

Releases a user OS thread waiting for a lock to be released, if the thread is already suspended.

Parameters

thr	in: query thread associated with the user OS thread

Definition at line 395 of file lock0wait.cc.

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UNIV_INTERN void lock_wait_suspend_thread

(

que_thr_t *

thr

)

Puts a user OS thread to wait for a lock to be released. If an error occurs during the wait trx->error_state associated with thr is != DB_SUCCESS when we return. DB_LOCK_WAIT_TIMEOUT and DB_DEADLOCK are possible errors. DB_DEADLOCK is returned if selective deadlock resolution chose this transaction as a victim.

Parameters

thr	in: query thread associated with the user OS thread

Definition at line 195 of file lock0wait.cc.

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UNIV_INTERN os_thread_ret_t DECLARE_THREAD() lock_wait_timeout_thread

(

void *arg

__attribute__(unused)

)

A thread which wakes up threads whose lock wait may have lasted too long.

Returns

a dummy parameter

Definition at line 480 of file lock0wait.cc.

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