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+#ifndef _EVENT_SCHEDULER_NG_H_
+#define _EVENT_SCHEDULER_NG_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; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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 */
+
+class Event_timed;
+class Event_queue;
+
+class Event_scheduler_ng
+{
+public:
+ Event_scheduler_ng(){}
+ ~Event_scheduler_ng(){}
+
+ enum enum_state
+ {
+ INITIALIZED = 0,
+ RUNNING,
+ STOPPING
+ };
+
+ /* 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);
+
+ bool
+ init(Event_queue *queue);
+
+ void
+ deinit();
+
+ void
+ init_mutexes();
+
+ void
+ deinit_mutexes();
+
+ /* Information retrieving methods follow */
+
+ enum enum_state
+ get_state();
+
+ void
+ queue_changed();
+
+ static int
+ dump_internal_status(THD *thd);
+
+private:
+ uint
+ workers_count();
+
+ /* helper functions */
+ bool
+ execute_top(THD *thd, Event_timed *job_data);
+
+ void
+ stop_all_running_events(THD *thd);
+
+ /* helper functions for working with mutexes & conditionals */
+ void
+ lock_data(const char *func, uint line);
+
+ void
+ unlock_data(const char *func, uint line);
+
+ pthread_mutex_t LOCK_scheduler_state;
+
+ /* This is the current status of the life-cycle of the scheduler. */
+ enum enum_state state;
+
+ /*
+ Holds the thread id of the executor thread or 0 if the scheduler is not
+ running. It is used by ::shutdown() to know which thread to kill with
+ kill_one_thread(). The latter wake ups a thread if it is waiting on a
+ conditional variable and sets thd->killed to non-zero.
+ */
+ ulong thread_id;
+
+ pthread_cond_t COND_state;
+
+ Event_queue *queue;
+ Event_db_repository *db_repository;
+
+ 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;
+
+private:
+ /* Prevent use of these */
+ Event_scheduler_ng(const Event_scheduler_ng &);
+ void operator=(Event_scheduler_ng &);
+};
+
+#endif /* _EVENT_SCHEDULER_NG_H_ */