Method sync_binlog_file

phx_percona/percona/sql/binlog.cc:7101–7135

Call fsync() to sync the file to disk. */

  Call fsync() to sync the file to disk.
*/
std::pair<bool, bool>
MYSQL_BIN_LOG::sync_binlog_file(bool force)
{
  bool synced= false;
  unsigned int sync_period= get_sync_period();
  if (force || (sync_period && ++sync_counter >= sync_period))
  {
    sync_counter= 0;

    /**
      On *pure non-transactional* workloads there is a small window
      in time where a concurrent rotate might be able to close
      the file before the sync is actually done. In that case,
      ignore the bad file descriptor errors.

      Transactional workloads (InnoDB) are not affected since the
      the rotation will not happen until all transactions have
      committed to the storage engine, thence decreased the XID
      counters.

      TODO: fix this properly even for non-transactional storage
            engines.
     */
    if (DBUG_EVALUATE_IF("simulate_error_during_sync_binlog_file", 1,
                         mysql_file_sync(log_file.file,
                                         MYF(MY_WME | MY_IGNORE_BADFD))))
    {
      THD *thd= current_thd;
      thd->commit_error= THD::CE_SYNC_ERROR;
      return std::make_pair(true, synced);
    }
    synced= true;
  }
  return std::make_pair(false, synced);
}


/**