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c06c7356e3
This patch implements the idea of the bug report by making Event_queue unaware of Event_db_repository by making a higher level class - Events, which is aware of most of all classes, responsible for passing all data needed for adding/updating/deleting an event to/from the queue. Introduces few new classes : - Event_worker_thread - Event_queue_element_for_exec
149 lines
2.9 KiB
C++
149 lines
2.9 KiB
C++
#ifndef _EVENT_SCHEDULER_H_
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#define _EVENT_SCHEDULER_H_
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/* Copyright (C) 2004-2006 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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class Event_queue;
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class Event_job_data;
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class Event_db_repository;
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class Events;
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void
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pre_init_event_thread(THD* thd);
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bool
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post_init_event_thread(THD* thd);
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void
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deinit_event_thread(THD *thd);
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class Event_worker_thread
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{
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public:
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static void
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init(Events *events, Event_db_repository *db_repo)
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{
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db_repository= db_repo;
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events_facade= events;
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}
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void
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run(THD *thd, Event_queue_element_for_exec *event);
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private:
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void
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print_warnings(THD *thd, Event_job_data *et);
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static Event_db_repository *db_repository;
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static Events *events_facade;
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};
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class Event_scheduler
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{
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public:
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Event_scheduler():state(UNINITIALIZED){}
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~Event_scheduler(){}
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/* State changing methods follow */
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bool
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start();
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bool
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stop();
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/*
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Need to be public because has to be called from the function
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passed to pthread_create.
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*/
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bool
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run(THD *thd);
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void
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init_scheduler(Event_queue *queue);
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void
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deinit_scheduler();
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void
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init_mutexes();
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void
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deinit_mutexes();
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/* Information retrieving methods follow */
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bool
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is_running();
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void
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dump_internal_status();
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private:
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uint
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workers_count();
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/* helper functions */
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bool
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execute_top(THD *thd, Event_queue_element_for_exec *event_name);
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/* helper functions for working with mutexes & conditionals */
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void
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lock_data(const char *func, uint line);
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void
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unlock_data(const char *func, uint line);
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void
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cond_wait(THD *thd, struct timespec *abstime, const char* msg,
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const char *func, uint line);
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pthread_mutex_t LOCK_scheduler_state;
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enum enum_state
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{
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UNINITIALIZED = 0,
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INITIALIZED,
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RUNNING,
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STOPPING
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};
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/* This is the current status of the life-cycle of the scheduler. */
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enum enum_state state;
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THD *scheduler_thd;
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pthread_cond_t COND_state;
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Event_queue *queue;
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uint mutex_last_locked_at_line;
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uint mutex_last_unlocked_at_line;
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const char* mutex_last_locked_in_func;
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const char* mutex_last_unlocked_in_func;
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bool mutex_scheduler_data_locked;
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bool waiting_on_cond;
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ulonglong started_events;
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private:
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/* Prevent use of these */
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Event_scheduler(const Event_scheduler &);
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void operator=(Event_scheduler &);
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};
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#endif /* _EVENT_SCHEDULER_H_ */
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