Function plugin_deinitialize

sql/sql_plugin.cc:1251–1296

}

static void plugin_deinitialize(struct st_plugin_int *plugin, bool ref_check)
{
  /*
    we don't want to hold the LOCK_plugin mutex as it may cause
    deinitialization to deadlock if plugins have worker threads
    with plugin locks
  */
  mysql_mutex_assert_not_owner(&LOCK_plugin);

  if (plugin->plugin->status_vars)
  {
    /*
      historical ndb behavior caused MySQL plugins to specify
      status var names in full, with the plugin name prefix.
      this was never fixed in MySQL.
      MariaDB fixes that but supports MySQL style too.
    */
    SHOW_VAR *show_vars= plugin->plugin->status_vars;
    SHOW_VAR tmp_array[2]= {
      {plugin->plugin->name, (char*)plugin->plugin->status_vars, SHOW_ARRAY},
      {0, 0, SHOW_UNDEF}
    };
    if (strncasecmp(show_vars->name, plugin->name.str, plugin->name.length))
      show_vars= tmp_array;

    remove_status_vars(show_vars);
  }

  plugin_type_init deinit= plugin_type_deinitialize[plugin->plugin->type];
  if (!deinit)
    deinit= (plugin_type_init)(plugin->plugin->deinit);

  if (deinit && deinit(plugin))
  {
    if (THD *thd= current_thd)
      push_warning(thd, Sql_condition::WARN_LEVEL_WARN,
                   WARN_PLUGIN_BUSY, ER_THD(thd, WARN_PLUGIN_BUSY));
  }
  else
    plugin->state= PLUGIN_IS_UNINITIALIZED; // free to unload

  if (ref_check && plugin->ref_count)
    sql_print_error("Plugin '%s' has ref_count=%d after deinitialization.",
                    plugin->name.str, plugin->ref_count);
  plugin_variables_deinit(plugin);
}

static void plugin_del(struct st_plugin_int *plugin, uint del_mask)
{