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#ifndef _EVENT_SCHEDULER_H_
#define _EVENT_SCHEDULER_H_
/* Copyright (C) 2004-2006 MySQL AB
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 Events;
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();
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 char* msg,
const char *func, uint line);
pthread_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;
pthread_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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