WL#3337 (Event scheduler new architecture)

This is the first cut of separating Event_scheduler in two
classes which are more specialized.
Inheritance was used to separate methods and member variables.
Still Event_scheduler is a child of Event_queue. This dependency
will be removed soon.


sql/event_data_objects.cc:
  add comments
sql/event_db_repository.cc:
  coding style
sql/event_db_repository.h:
  add a call, will be implemented later
sql/event_queue.cc:
  Event_queue, still as super-class of Event_scheduler
sql/event_queue.h:
  Event_queue as super-class of Event_scheduler. Trying to
  separate the two classes
sql/event_scheduler.cc:
  Event_scheduler as child class of Event_queue.
  Trying to separate both classes.
sql/event_scheduler.h:
  Event_scheduler as child class of Event_queue.
  Trying to separate both classes.
sql/events.cc:
  Don't allocate on the stack the scheduler but on the heap.
  The exact way it is done will be changed, that's ok for now.

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/events.cc b/sql/events.cc
index 28c57d6b493..09d5ee21a4f 100644
--- a/sql/events.cc
+++ b/sql/events.cc
@@ -559,6 +559,7 @@ void
 Events::init_mutexes()
 {
   db_repository= new Event_db_repository;
+  Event_scheduler::create_instance();
   Event_scheduler::init_mutexes();
 }