Function tdc_lock_share

sql/table_cache.cc:739–763

*/

TDC_element *tdc_lock_share(THD *thd, const char *db, const char *table_name)
{
  TDC_element *element;
  char key[MAX_DBKEY_LENGTH];

  DBUG_ENTER("tdc_lock_share");
  if (unlikely(fix_thd_pins(thd)))
    DBUG_RETURN((TDC_element*) MY_ERRPTR);

  element= (TDC_element *) lf_hash_search(&tdc_hash, thd->tdc_hash_pins,
                                          (uchar*) key,
                                          tdc_create_key(key, db, table_name));
  if (element)
  {
    mysql_mutex_lock(&element->LOCK_table_share);
    if (unlikely(!element->share || element->share->error))
    {
      mysql_mutex_unlock(&element->LOCK_table_share);
      element= 0;
    }
    lf_hash_search_unpin(thd->tdc_hash_pins);
  }

  DBUG_RETURN(element);
}


/**