Function tc_add_table

sql/table_cache.cc:344–385

*/

void tc_add_table(THD *thd, TABLE *table)
{
  uint32_t i=
    thd->thread_id % tc_active_instances.load(std::memory_order_relaxed);
  TABLE *LRU_table= 0;
  TDC_element *element= table->s->tdc;

  DBUG_ASSERT(table->in_use == thd);
  table->instance= i;
  mysql_mutex_lock(&element->LOCK_table_share);
  /* Wait for MDL deadlock detector to complete traversing tdc.all_tables. */
  while (element->all_tables_refs)
    mysql_cond_wait(&element->COND_release, &element->LOCK_table_share);
  element->all_tables.push_front(table);
  mysql_mutex_unlock(&element->LOCK_table_share);

  mysql_mutex_lock(&tc[i].LOCK_table_cache);
  if (tc[i].records == tc_size)
  {
    if ((LRU_table= tc[i].free_tables.pop_front()))
    {
      LRU_table->s->tdc->free_tables[i].list.remove(LRU_table);
      /* Needed if MDL deadlock detector chimes in before tc_remove_table() */
      LRU_table->in_use= thd;
      mysql_mutex_unlock(&tc[i].LOCK_table_cache);
      /* Keep out of locked LOCK_table_cache */
      tc_remove_table(LRU_table);
    }
    else
    {
      tc[i].records++;
      mysql_mutex_unlock(&tc[i].LOCK_table_cache);
    }
    /* Keep out of locked LOCK_table_cache */
    status_var_increment(thd->status_var.table_open_cache_overflows);
  }
  else
  {
    tc[i].records++;
    mysql_mutex_unlock(&tc[i].LOCK_table_cache);
  }
}


/**