Function tc_acquire_table

sql/table_cache.cc:398–418

*/

TABLE *tc_acquire_table(THD *thd, TDC_element *element)
{
  uint32_t n_instances= tc_active_instances.load(std::memory_order_relaxed);
  uint32_t i= thd->thread_id % n_instances;
  TABLE *table;

  tc[i].lock_and_check_contention(n_instances, i);
  table= element->free_tables[i].list.pop_front();
  if (table)
  {
    DBUG_ASSERT(!table->in_use);
    table->in_use= thd;
    /* The ex-unused table must be fully functional. */
    DBUG_ASSERT(table->db_stat && table->file);
    /* The children must be detached from the table. */
    DBUG_ASSERT(!table->file->extra(HA_EXTRA_IS_ATTACHED_CHILDREN));
    tc[i].free_tables.remove(table);
  }
  mysql_mutex_unlock(&tc[i].LOCK_table_cache);
  return table;
}


/**