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

@@ -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);
 }
 
 /*

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);
 

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 */

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 */