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135 lines
3.4 KiB
C++
135 lines
3.4 KiB
C++
#ifndef _EVENT_QUEUE_H_
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#define _EVENT_QUEUE_H_
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/* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
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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 Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/**
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@addtogroup Event_Scheduler
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@{
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@file event_queue.h
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Queue of events awaiting execution.
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*/
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#ifdef HAVE_PSI_INTERFACE
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extern PSI_mutex_key key_LOCK_event_queue;
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extern PSI_cond_key key_COND_queue_state;
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#endif /* HAVE_PSI_INTERFACE */
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#include "queues.h" // QUEUE
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#include "sql_string.h" /* LEX_CSTRING */
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#include "my_time.h" /* my_time_t, interval_type */
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class Event_basic;
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class Event_queue_element;
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class Event_queue_element_for_exec;
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class THD;
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/**
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Queue of active events awaiting execution.
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*/
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class Event_queue
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{
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public:
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Event_queue();
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~Event_queue();
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bool
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init_queue(THD *thd);
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/* Methods for queue management follow */
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bool
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create_event(THD *thd, Event_queue_element *new_element,
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bool *created);
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void
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update_event(THD *thd, const LEX_CSTRING *dbname, const LEX_CSTRING *name,
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Event_queue_element *new_element);
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void
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drop_event(THD *thd, const LEX_CSTRING *dbname, const LEX_CSTRING *name);
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void
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drop_schema_events(THD *thd, const LEX_CSTRING *schema);
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void
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recalculate_activation_times(THD *thd);
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bool
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get_top_for_execution_if_time(THD *thd,
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Event_queue_element_for_exec **event_name);
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void
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dump_internal_status();
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private:
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void
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empty_queue();
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void
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deinit_queue();
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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 PSI_stage_info *stage,
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const char *src_func, const char *src_file, uint src_line);
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void
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find_n_remove_event(const LEX_CSTRING *db, const LEX_CSTRING *name);
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void
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drop_matching_events(THD *thd, const LEX_CSTRING *pattern,
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bool (*)(const LEX_CSTRING*, Event_basic *));
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void
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dbug_dump_queue(my_time_t now);
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/* LOCK_event_queue is the mutex which protects the access to the queue. */
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mysql_mutex_t LOCK_event_queue;
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mysql_cond_t COND_queue_state;
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/* The sorted queue with the Event_queue_element objects */
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QUEUE queue;
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my_time_t next_activation_at;
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uint mutex_last_locked_at_line;
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uint mutex_last_unlocked_at_line;
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uint mutex_last_attempted_lock_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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const char* mutex_last_attempted_lock_in_func;
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bool mutex_queue_data_locked;
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bool mutex_queue_data_attempting_lock;
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bool waiting_on_cond;
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};
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/**
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@} (End of group Event_Scheduler)
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*/
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#endif /* _EVENT_QUEUE_H_ */
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