WL #3337 (Event scheduler new architecture)

Cut Nr. 8.

All tests pass.

Separated Event_scheduler into Event_queue and Event_scheduler.
Added new Event_scheduler_ng which is the new scheduler and is used
system-wide. Will be moved to the event_scheduler.cc in the future.
Using Event_timed in Event_queue as well as cloned during execution.
Next step is to have Event_worker_data which will be used during execution
and will take ::compile()/::execute() out of Event_timed.


mysql-test/r/events.result:
  update result
mysql-test/r/events_bugs.result:
  update result
mysql-test/r/ps_1general.result:
  update result
mysql-test/r/skip_name_resolve.result:
  update result
mysql-test/r/sp-threads.result:
  update result
mysql-test/r/sp_notembedded.result:
  update result
mysql-test/r/status.result:
  update result
mysql-test/t/events_stress.test:
  Make event_stress a bit longer
sql/Makefile.am:
  Add new event_scheduler_ng.h/cc . These are only to be in the experimental
  clone. Later their content will be moved to event_scheduler.h/cc
sql/event_data_objects.cc:
  Allocate strings memory on own memory root, instead
  on the schedulers. Thus don't "leak" memory. This should
  fix bug#18683 memory leak in event scheduler
sql/event_data_objects.h:
  add mem_root
  add THD - this is only temporal, will be moved to class Event_job_data
  once Event_job_data is responsible for the execution.
sql/event_db_repository.cc:
  Remove unused code.
  Cosmetic changes
sql/event_queue.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/event_queue.h:
  Now use the Event_scheduler_ng (NextGen)
sql/event_scheduler.cc:
  This file is no more used, but will be soon.
sql/event_scheduler.h:
  This file is no more used but will be soon
sql/events.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/events.h:
  Now use the Event_scheduler_ng (NextGen)
sql/mysqld.cc:
  Make it again possible to kill the scheduler thread
sql/set_var.cc:
  Now use the Event_scheduler_ng (NextGen)
sql/share/errmsg.txt:
  Shorten the message.
sql/sql_show.cc:
  Loading is on a own root, then don't use thd->mem_root

1 files changed, 20 insertions, 10 deletions

diff --git a/sql/event_queue.h b/sql/event_queue.h
index 8c11d7a2042..1335100be21 100644
--- a/sql/event_queue.h
+++ b/sql/event_queue.h
@@ -19,22 +19,23 @@
 class sp_name;
 class Event_timed;
 class Event_db_repository;
+class Event_job_data;
 
 class THD;
 typedef bool * (*event_timed_identifier_comparator)(Event_timed*, Event_timed*);
 
-class Event_scheduler;
+class Event_scheduler_ng;
 
 class Event_queue
 {
 public:
   Event_queue();
 
-  static void
+  void
   init_mutexes();
   
-  static void
-  destroy_mutexes();
+  void
+  deinit_mutexes();
   
   bool
   init(Event_db_repository *db_repo);
@@ -76,6 +77,18 @@ public:
   void
   empty_queue();
 
+  Event_timed *
+  get_top_for_execution_if_time(THD *thd, time_t now, struct timespec *abstime);
+ 
+  Event_timed*
+  get_top();
+  
+  void
+  remove_top();
+  
+  void
+  top_changed();
+
 ///////////////protected
   Event_timed *
   find_event(LEX_STRING db, LEX_STRING name, bool remove_from_q);
@@ -92,9 +105,6 @@ public:
 
   Event_db_repository *db_repository;
 
-  /* The MEM_ROOT of the object */
-  MEM_ROOT scheduler_root;
-
   /* The sorted queue with the Event_timed objects */
   QUEUE queue;
   
@@ -111,11 +121,11 @@ public:
   void
   unlock_data(const char *func, uint line);
 
-  static void
+  void
   on_queue_change();
+  
+  Event_scheduler_ng *scheduler;
 protected:
-  /* Singleton instance */
-  static Event_scheduler *singleton;
 
 };