Next big patch for loadable storage engines!

Handlerton array is now created instead of using sys_table_types_st. All storage engines can now have inits and giant ifdef's are now gone for startup. No compeltely clean yet, handlertons will next be merged with sys_table_types. Federated and archive now have real cleanup if their inits fail. 


sql/examples/ha_archive.cc:
  Modifications for new ha_init code. The init method now checks for errors and will not start up if the errors occur.
sql/examples/ha_archive.h:
  Change for new init method.
sql/examples/ha_example.cc:
  New handlerton pieces.
sql/examples/ha_tina.cc:
  New handlerton pieces.
sql/ha_berkeley.cc:
  New handlerton pieces, plus changes for ha_init changes. I'm not happy with our current "skip" setup.
sql/ha_berkeley.h:
  Change in init return.
sql/ha_blackhole.cc:
  Changes for new handlerton pieces.
sql/ha_federated.cc:
  Changes for new handlerton and true cleanup code.
sql/ha_heap.cc:
  Changes for new handlerton returns.
sql/ha_innodb.cc:
  Changes for handlerton code.
sql/ha_innodb.h:
  Change in init.
sql/ha_myisam.cc:
  Changes for additional handlerton bits.
sql/ha_myisammrg.cc:
  Changes for  new handlerton bits.
sql/ha_ndbcluster.cc:
  Changes for new handlerton bits.
sql/ha_ndbcluster.h:
  Changes for handlerton bits.
sql/handler.cc:
  Changes for ditching show_table_type_st types, and collapsing it into a handlerton array. The ha_init now just loops through all handlers to init (much cleaner...). handlertons and sys_table_types should be merged next.
sql/handler.h:
  Additions for sys_table_types
sql/log.cc:
  Clean up of binlog for changes in handlerton
sql/mysql_priv.h:
  Removed unneeded define for binlog_init
sql/sql_show.cc:
  Changes for change in handlerton to sys_table_types

4 files changed, 33 insertions, 10 deletions

diff --git a/sql/examples/ha_archive.cc b/sql/examples/ha_archive.cc
index 7a0c957e5c3..91e8c5d5eee 100644
--- a/sql/examples/ha_archive.cc
+++ b/sql/examples/ha_archive.cc
@@ -116,7 +116,7 @@
 */
 
 /* If the archive storage engine has been inited */
-static bool archive_inited= 0;
+static bool archive_inited= FALSE;
 /* Variables for archive share methods */
 pthread_mutex_t archive_mutex;
 static HASH archive_open_tables;
@@ -138,6 +138,10 @@ static HASH archive_open_tables;
 /* dummy handlerton - only to have something to return from archive_db_init */
 handlerton archive_hton = {
   "archive",
+  SHOW_OPTION_YES,
+  "Archive storage engine", 
+  DB_TYPE_ARCHIVE_DB,
+  archive_db_init,
   0,       /* slot */
   0,       /* savepoint size. */
   NULL,    /* close_connection */
@@ -176,18 +180,29 @@ static byte* archive_get_key(ARCHIVE_SHARE *share,uint *length,
     void
 
   RETURN
-    &archive_hton OK
-    0             Error
+    FALSE       OK
+    TRUE        Error
 */
 
-handlerton *archive_db_init()
+bool archive_db_init()
 {
-  archive_inited= 1;
-  VOID(pthread_mutex_init(&archive_mutex, MY_MUTEX_INIT_FAST));
+  DBUG_ENTER("archive_db_init");
+  if (pthread_mutex_init(&archive_mutex, MY_MUTEX_INIT_FAST))
+    goto error;
   if (hash_init(&archive_open_tables, system_charset_info, 32, 0, 0,
                 (hash_get_key) archive_get_key, 0, 0))
-    return 0;
-  return &archive_hton;
+  {
+    VOID(pthread_mutex_destroy(&archive_mutex));
+  }
+  else
+  {
+    archive_inited= TRUE;
+    DBUG_RETURN(FALSE);
+  }
+error:
+  have_archive_db= SHOW_OPTION_DISABLED;	// If we couldn't use handler
+  archive_hton.state= SHOW_OPTION_DISABLED;
+  DBUG_RETURN(TRUE);
 }
 
 /*
diff --git a/sql/examples/ha_archive.h b/sql/examples/ha_archive.h
index e2d8aa49add..849b5b5bd6c 100644
--- a/sql/examples/ha_archive.h
+++ b/sql/examples/ha_archive.h
@@ -105,6 +105,6 @@ public:
                              enum thr_lock_type lock_type);
 };
 
-handlerton *archive_db_init(void);
+bool archive_db_init(void);
 bool archive_db_end(void);
 
diff --git a/sql/examples/ha_example.cc b/sql/examples/ha_example.cc
index cc4ad3eb535..85497ecf9b4 100644
--- a/sql/examples/ha_example.cc
+++ b/sql/examples/ha_example.cc
@@ -74,7 +74,11 @@
 
 
 handlerton example_hton= {
-  "CSV",
+  "EXAMPLE",
+  SHOW_OPTION_YES,
+  "Example storage engine", 
+  DB_TYPE_EXAMPLE_DB,
+  NULL,    /* We do need to write one! */
   0,       /* slot */
   0,       /* savepoint size. */
   NULL,    /* close_connection */
diff --git a/sql/examples/ha_tina.cc b/sql/examples/ha_tina.cc
index 5663cd829bd..27d1a94271b 100644
--- a/sql/examples/ha_tina.cc
+++ b/sql/examples/ha_tina.cc
@@ -56,6 +56,10 @@ static int tina_init= 0;
 
 handlerton tina_hton= {
   "CSV",
+  SHOW_OPTION_YES,
+  "CSV storage engine", 
+  DB_TYPE_CSV_DB,
+  NULL,    /* One needs to be written! */
   0,       /* slot */
   0,       /* savepoint size. */
   NULL,    /* close_connection */