Plugin API: increase SHOW_VAR_FUNC_BUFF_SIZE for 64-bit CPUs

instead of having it 1K everywhere, make it 1K on 32-bit and 2K on 64-bit.
As the latter has larger pointers (and larger sizeof(SHOW_VAR),
it needs a larger buffer to store the same amount of SHOW_VARs

include/mysql/plugin.h

@@ -75,7 +75,7 @@ typedef struct st_mysql_xid MYSQL_XID;
 #define MYSQL_PLUGIN_INTERFACE_VERSION 0x0104
 
 /* MariaDB plugin interface version */
-#define MARIA_PLUGIN_INTERFACE_VERSION 0x0109
+#define MARIA_PLUGIN_INTERFACE_VERSION 0x010a
 
 /*
   The allowable types of plugins
@@ -186,7 +186,7 @@ struct st_mysql_show_var {
   enum enum_mysql_show_type type;
 };
 
-#define SHOW_VAR_FUNC_BUFF_SIZE 1024
+#define SHOW_VAR_FUNC_BUFF_SIZE (256 * sizeof(void*))
 typedef int (*mysql_show_var_func)(MYSQL_THD, struct st_mysql_show_var*, char *);
 
 

mysql-test/r/handlersocket.result

@@ -5,7 +5,7 @@ plugin_version	1.0
 plugin_status	ACTIVE
 plugin_type	DAEMON
 plugin_library	handlersocket.so
-plugin_library_version	1.9
+plugin_library_version	1.10
 plugin_author	higuchi dot akira at dena dot jp
 plugin_description	Direct access into InnoDB
 plugin_license	BSD

mysql-test/r/plugin.result

@@ -15,7 +15,7 @@ PLUGIN_STATUS	ACTIVE
 PLUGIN_TYPE	STORAGE ENGINE
 PLUGIN_TYPE_VERSION	#
 PLUGIN_LIBRARY	ha_example.so
-PLUGIN_LIBRARY_VERSION	1.9
+PLUGIN_LIBRARY_VERSION	1.10
 PLUGIN_AUTHOR	Brian Aker, MySQL AB
 PLUGIN_DESCRIPTION	Example storage engine
 PLUGIN_LICENSE	GPL
@@ -28,7 +28,7 @@ PLUGIN_STATUS	ACTIVE
 PLUGIN_TYPE	DAEMON
 PLUGIN_TYPE_VERSION	#
 PLUGIN_LIBRARY	ha_example.so
-PLUGIN_LIBRARY_VERSION	1.9
+PLUGIN_LIBRARY_VERSION	1.10
 PLUGIN_AUTHOR	Sergei Golubchik
 PLUGIN_DESCRIPTION	Unusable Daemon
 PLUGIN_LICENSE	GPL
@@ -67,7 +67,7 @@ PLUGIN_STATUS	DELETED
 PLUGIN_TYPE	STORAGE ENGINE
 PLUGIN_TYPE_VERSION	#
 PLUGIN_LIBRARY	ha_example.so
-PLUGIN_LIBRARY_VERSION	1.9
+PLUGIN_LIBRARY_VERSION	1.10
 PLUGIN_AUTHOR	Brian Aker, MySQL AB
 PLUGIN_DESCRIPTION	Example storage engine
 PLUGIN_LICENSE	GPL

mysql-test/suite/plugins/r/show_all_plugins.result

@@ -4,8 +4,8 @@ Variable_name	Value
 Opened_plugin_libraries	0
 select * from information_schema.all_plugins where plugin_library='ha_example.so';
 PLUGIN_NAME	PLUGIN_VERSION	PLUGIN_STATUS	PLUGIN_TYPE	PLUGIN_TYPE_VERSION	PLUGIN_LIBRARY	PLUGIN_LIBRARY_VERSION	PLUGIN_AUTHOR	PLUGIN_DESCRIPTION	PLUGIN_LICENSE	LOAD_OPTION	PLUGIN_MATURITY	PLUGIN_AUTH_VERSION
-EXAMPLE	0.1	NOT INSTALLED	STORAGE ENGINE	MYSQL_VERSION_ID	ha_example.so	1.9	Brian Aker, MySQL AB	Example storage engine	GPL	OFF	Experimental	0.1
-UNUSABLE	3.14	NOT INSTALLED	DAEMON	MYSQL_VERSION_ID	ha_example.so	1.9	Sergei Golubchik	Unusable Daemon	GPL	OFF	Experimental	3.14.15.926
+EXAMPLE	0.1	NOT INSTALLED	STORAGE ENGINE	MYSQL_VERSION_ID	ha_example.so	1.10	Brian Aker, MySQL AB	Example storage engine	GPL	OFF	Experimental	0.1
+UNUSABLE	3.14	NOT INSTALLED	DAEMON	MYSQL_VERSION_ID	ha_example.so	1.10	Sergei Golubchik	Unusable Daemon	GPL	OFF	Experimental	3.14.15.926
 show status like '%libraries%';
 Variable_name	Value
 Opened_plugin_libraries	1