plugin_register (TYPE_INIT, 'myplugin', 'my_init');
plugin_register (TYPE_READ, 'myplugin', 'my_read');
plugin_register (TYPE_WRITE, 'myplugin', 'my_write');
plugin_register (TYPE_INIT, 'myplugin', 'my_init');
plugin_register (TYPE_READ, 'myplugin', 'my_read');
plugin_register (TYPE_WRITE, 'myplugin', 'my_write');