#ifndef _EVENT_SCHEDULER_H_
#define _EVENT_SCHEDULER_H_
/* Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
This program is free software ; you can redistribute it and / or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation ; version 2 of the License .
This program is distributed in the hope that it will be useful ,
but WITHOUT ANY WARRANTY ; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
GNU General Public License for more details .
You should have received a copy of the GNU General Public License
along with this program ; if not , write to the Free Software Foundation ,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/**
@ addtogroup Event_Scheduler
@ {
*/
/**
@ file
Declarations of the scheduler thread class
and related functionality .
This file is internal to Event_Scheduler module . Please do not
include it directly . All public declarations of Event_Scheduler
module are in events . h and event_data_objects . h .
*/
class Event_queue;
class Event_job_data;
class Event_db_repository;
class Event_queue_element_for_exec;
class Events;
class THD;
void
pre_init_event_thread(THD* thd);
bool
post_init_event_thread(THD* thd);
void
deinit_event_thread(THD *thd);
class Event_worker_thread
{
public :
static void
init(Event_db_repository *db_repository_arg)
{
db_repository= db_repository_arg;
}
void
run(THD *thd, Event_queue_element_for_exec *event);
private :
void
print_warnings(THD *thd, Event_job_data *et);
static Event_db_repository *db_repository;
};
class Event_scheduler
{
public :
Event_scheduler(Event_queue *event_queue_arg);
~Event_scheduler();
/* State changing methods follow */
bool
start(int *err_no);
bool
stop();
/*
Need to be public because has to be called from the function
passed to pthread_create .
*/
bool
run(THD *thd);
/* Information retrieving methods follow */
bool
is_running();
void
dump_internal_status();
private :
uint
workers_count();
/* helper functions */
bool
execute_top(Event_queue_element_for_exec *event_name);
/* helper functions for working with mutexes & conditionals */
void
lock_data(const char *func, uint line);
void
unlock_data(const char *func, uint line);
void
cond_wait(THD *thd, struct timespec *abstime, const PSI_stage_info *stage,
const char *src_func, const char *src_file, uint src_line);
mysql_mutex_t LOCK_scheduler_state;
enum enum_state
{
INITIALIZED = 0 ,
RUNNING,
STOPPING
};
/* This is the current status of the life-cycle of the scheduler. */
enum enum_state state;
THD *scheduler_thd;
mysql_cond_t COND_state;
Event_queue *queue;
uint mutex_last_locked_at_line;
uint mutex_last_unlocked_at_line;
const char * mutex_last_locked_in_func;
const char * mutex_last_unlocked_in_func;
bool mutex_scheduler_data_locked;
bool waiting_on_cond;
ulonglong started_events;
private :
/* Prevent use of these */
Event_scheduler(const Event_scheduler &);
void operator =(Event_scheduler &);
};
/**
@ } ( End of group Event_Scheduler )
*/
#endif /* _EVENT_SCHEDULER_H_ */
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