Method new_file_impl

phx_percona/percona/sql/binlog.cc:5076–5254

Start writing to a new log file or reopen the old file. @param need_lock_log If true, this function acquires LOCK_log; otherwise the caller should already have acquired it. @retval 0 success @retval nonzero - error @note The new file name is stored last in the index file */

  @note The new file name is stored last in the index file
*/
int MYSQL_BIN_LOG::new_file_impl(bool need_lock_log, Format_description_log_event *extra_description_event)
{
  int error= 0, close_on_error= FALSE;
  char new_name[FN_REFLEN], *new_name_ptr, *old_name, *file_to_open;

  DBUG_ENTER("MYSQL_BIN_LOG::new_file_impl");
  if (!is_open())
  {
    DBUG_PRINT("info",("log is closed"));
    DBUG_RETURN(error);
  }

  if (need_lock_log)
    mysql_mutex_lock(&LOCK_log);
  else
    mysql_mutex_assert_owner(&LOCK_log);
  DBUG_EXECUTE_IF("semi_sync_3-way_deadlock",
                  DEBUG_SYNC(current_thd, "before_rotate_binlog"););
  mysql_mutex_lock(&LOCK_xids);
  /*
    We need to ensure that the number of prepared XIDs are 0.

    If m_prep_xids is not zero:
    - We wait for storage engine commit, hence decrease m_prep_xids
    - We keep the LOCK_log to block new transactions from being
      written to the binary log.
   */
  while (get_prep_xids() > 0)
  {
    DEBUG_SYNC(current_thd, "before_rotate_binlog_file");
    mysql_cond_wait(&m_prep_xids_cond, &LOCK_xids);
  }
  mysql_mutex_unlock(&LOCK_xids);

  mysql_mutex_lock(&LOCK_index);

  if (DBUG_EVALUATE_IF("expire_logs_always", 0, 1)
      && (error= ha_flush_logs(NULL)))
    goto end;

  mysql_mutex_assert_owner(&LOCK_log);
  mysql_mutex_assert_owner(&LOCK_index);


  /*
    If user hasn't specified an extension, generate a new log name
    We have to do this here and not in open as we want to store the
    new file name in the current binary log file.
  */
  new_name_ptr= new_name;
  if ((error= generate_new_name(new_name, name)))
  {
    // Use the old name if generation of new name fails.
    strcpy(new_name, name);
    close_on_error= TRUE;
    goto end;
  }
  else