Trivial cleanups and whitespace change in Event Scheduler code.

A larger patch is to come, this is to exclude rudimentary changes
from it.


sql/event_data_objects.cc:
  Whitespace change.
sql/event_data_objects.h:
  Remove debug allocators - we have safemalloc.
sql/event_db_repository.cc:
  Whitespace change.
sql/event_db_repository.h:
  Whitespace change.
sql/event_queue.cc:
  Remove an unused structure. Whitespace change.
sql/event_queue.h:
  Whitespace.
sql/event_scheduler.cc:
  Whitespace change.
sql/event_scheduler.h:
  Add comments. Whitespace change.
sql/events.cc:
  Whitespace change.
sql/events.h:
  Trivial cleanups.

sql/event_data_objects.cc

@@ -1382,7 +1382,6 @@ Event_queue_element::compute_next_execution_time()
     DBUG_PRINT("info", ("Dropped: %d", dropped));
     status= Event_queue_element::DISABLED;
     status_changed= TRUE;
-    dropped= TRUE;
 
     goto ret;
   }
@@ -1762,7 +1761,7 @@ Event_timed::get_create_event(THD *thd, String *buf)
 */
 
 int
-Event_job_data::get_fake_create_event(THD *thd, String *buf)
+Event_job_data::get_fake_create_event(String *buf)
 {
   DBUG_ENTER("Event_job_data::get_create_event");
   /* FIXME: "EVERY 3337 HOUR" is asking for trouble. */
@@ -1878,7 +1877,7 @@ Event_job_data::compile(THD *thd, MEM_ROOT *mem_root)
 
   show_create.length(0);
 
-  switch (get_fake_create_event(thd, &show_create)) {
+  switch (get_fake_create_event(&show_create)) {
   case EVEX_MICROSECOND_UNSUP:
     DBUG_RETURN(EVEX_MICROSECOND_UNSUP);
   case 0:

sql/event_data_objects.h

@@ -127,24 +127,6 @@ class Event_queue_element : public Event_basic
 
   bool
   update_timing_fields(THD *thd);
-
-  static void *operator new(size_t size)
-  {
-    void *p;
-    DBUG_ENTER("Event_queue_element::new(size)");
-    p= my_malloc(size, MYF(0));
-    DBUG_PRINT("info", ("alloc_ptr: 0x%lx", (long) p));
-    DBUG_RETURN(p);
-  }
-
-  static void operator delete(void *ptr, size_t size)
-  {
-    DBUG_ENTER("Event_queue_element::delete(ptr,size)");
-    DBUG_PRINT("enter", ("free_ptr: 0x%lx", (long) ptr));
-    TRASH(ptr, size);
-    my_free((gptr) ptr, MYF(0));
-    DBUG_VOID_RETURN;
-  }
 };
 
 
@@ -206,7 +188,7 @@ class Event_job_data : public Event_basic
   compile(THD *thd, MEM_ROOT *mem_root);
 private:
   int
-  get_fake_create_event(THD *thd, String *buf);
+  get_fake_create_event(String *buf);
 
   Event_job_data(const Event_job_data &);       /* Prevent use of these */
   void operator=(Event_job_data &);

sql/event_queue.cc

@@ -32,16 +32,6 @@
 #define LOCK_QUEUE_DATA()   lock_data(SCHED_FUNC, __LINE__)
 #define UNLOCK_QUEUE_DATA() unlock_data(SCHED_FUNC, __LINE__)
 
-struct event_queue_param
-{
-  THD *thd;
-  Event_queue *queue;
-  pthread_mutex_t LOCK_loaded;
-  pthread_cond_t COND_loaded;
-  bool loading_finished;
-};
-
-
 /*
   Compares the execute_at members of two Event_queue_element instances.
   Used as callback for the prioritized queue when shifting
@@ -183,7 +173,7 @@ Event_queue::deinit_queue()
 }
 
 
-/*
+/**
   Adds an event to the queue.
 
   SYNOPSIS

sql/event_scheduler.cc

@@ -458,7 +458,7 @@ Event_scheduler::start()
   scheduler_thd= new_thd;
   DBUG_PRINT("info", ("Setting state go RUNNING"));
   state= RUNNING;
-  DBUG_PRINT("info", ("Forking new thread for scheduduler. THD: 0x%lx", (long) new_thd));
+  DBUG_PRINT("info", ("Forking new thread for scheduler. THD: 0x%lx", (long) new_thd));
   if (pthread_create(&th, &connection_attrib, event_scheduler_thread,
                     (void*)scheduler_param_value))
   {
@@ -525,7 +525,7 @@ Event_scheduler::run(THD *thd)
                         "event_name=0x%lx", (long) event_name));
     if (event_name)
     {
-      if ((res= execute_top(thd, event_name)))
+      if ((res= execute_top(event_name)))
         break;
     }
     else
@@ -559,7 +559,7 @@ Event_scheduler::run(THD *thd)
 */
 
 bool
-Event_scheduler::execute_top(THD *thd, Event_queue_element_for_exec *event_name)
+Event_scheduler::execute_top(Event_queue_element_for_exec *event_name)
 {
   THD *new_thd;
   pthread_t th;
@@ -631,7 +631,7 @@ Event_scheduler::is_running()
 }
 
 
-/*
+/**
   Stops the scheduler (again). Waits for acknowledgement from the
   scheduler that it has stopped - synchronous stopping.
 

sql/event_scheduler.h

@@ -15,6 +15,12 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
+/*
+  This file is internal to Events module. Please do not include it directly.
+  All public declarations of Events module are in events.h and
+  event_data_objects.h.
+*/
+
 
 class Event_queue;
 class Event_job_data;
@@ -99,7 +105,7 @@ class Event_scheduler
 
   /* helper functions */
   bool
-  execute_top(THD *thd, Event_queue_element_for_exec *event_name);
+  execute_top(Event_queue_element_for_exec *event_name);
 
   /* helper functions for working with mutexes & conditionals */
   void

sql/events.cc

@@ -346,7 +346,6 @@ Events::create_event(THD *thd, Event_parse_data *parse_data, bool if_not_exists)
   pthread_mutex_unlock(&LOCK_event_metadata);
 
   DBUG_RETURN(ret);
-  
 }
 
 
@@ -444,7 +443,7 @@ Events::drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name, bool if_exists)
 }
 
 
-/*
+/**
   Drops all events from a schema
 
   SYNOPSIS
@@ -697,7 +696,7 @@ Events::deinit()
 }
 
 
-/*
+/**
   Inits Events mutexes
 
   SYNOPSIS
@@ -755,7 +754,7 @@ Events::dump_internal_status()
 }
 
 
-/*
+/**
   Starts execution of events by the scheduler
 
   SYNOPSIS

sql/events.h

@@ -19,7 +19,6 @@ class sp_name;
 class Event_parse_data;
 class Event_db_repository;
 class Event_queue;
-class Event_queue_element;
 class Event_scheduler;
 
 /* Return codes */
@@ -38,6 +37,10 @@ enum enum_events_error_code
 int
 sortcmp_lex_string(LEX_STRING s, LEX_STRING t, CHARSET_INFO *cs);
 
+/**
+  @class Events -- a facade to the functionality of the Event Scheduler.
+
+*/
 
 class Events
 {