Function plugin_shutdown

sql/sql_plugin.cc:2092–2225

void plugin_shutdown(void)
{
  size_t i, count= plugin_array.elements;
  struct st_plugin_int **plugins, *plugin;
  struct st_plugin_dl **dl;
  DBUG_ENTER("plugin_shutdown");

  if (initialized)
  {
    if (opt_gtid_pos_auto_plugins)
    {
      free_engine_list(opt_gtid_pos_auto_plugins);
      opt_gtid_pos_auto_plugins= NULL;
    }

    mysql_mutex_lock(&LOCK_plugin);

    reap_needed= true;

    /*
      We want to shut down plugins in a reasonable order, this will
      become important when we have plugins which depend upon each other.
      Circular references cannot be reaped so they are forced afterwards.
      TODO: Have an additional step here to notify all active plugins that
      shutdown is requested to allow plugins to deinitialize in parallel.
    */
    while (reap_needed && (count= plugin_array.elements))
    {
      reap_plugins();
      for (i= 0; i < count; i++)
      {
        plugin= *dynamic_element(&plugin_array, i, struct st_plugin_int **);
        if (plugin->state == PLUGIN_IS_READY)
        {
          plugin->state= PLUGIN_IS_DELETED;
          reap_needed= true;
        }
      }
      if (!reap_needed)
      {
        /*
          release any plugin references held.
        */
        unlock_variables(NULL, &global_system_variables);
        unlock_variables(NULL, &max_system_variables);
      }
    }

    plugins= (struct st_plugin_int **) my_alloca(sizeof(void*) * (count+1));

    /*
      If we have any plugins which did not die cleanly, we force shutdown.
      Don't re-deinit() plugins that failed deinit() earlier (already dying)
    */
    for (i= 0; i < count; i++)
    {
      plugins[i]= *dynamic_element(&plugin_array, i, struct st_plugin_int **);
      if (plugins[i]->state == PLUGIN_IS_DYING)