Method roll

src/proxy/logging/LogFile.cc:360–389

------------------------------------------------------------------------- * LogFile::roll * This function is called by a LogObject to roll its files. * * Return 1 if file rolled, 0 otherwise -------------------------------------------------------------------------*/

 * Return 1 if file rolled, 0 otherwise
-------------------------------------------------------------------------*/
int
LogFile::roll(long interval_start, long interval_end, bool reopen_after_rolling)
{
  if (m_log) {
    // Due to commit 346b419 the BaseLogFile::close_file() is no longer called within BaseLogFile::roll().
    // For diagnostic log files, the rolling is implemented by renaming and destroying the BaseLogFile object
    // and then creating a new BaseLogFile object with the original filename. Due to possible race conditions
    // the old/new object swap happens within lock/unlock calls within Diags.cc.
    // For logging log files, the rolling is implemented by renaming the original file and closing it.
    // Afterwards, the LogFile object will re-open a new file with the original file name using the original object.
    // There is no need to protect against contention since the open/close/writes are all executed under a
    // single log flush thread.
    // Since these two methods of using BaseLogFile are not compatible, we perform the logging log file specific
    // close file operation here within the containing LogFile object.
    if (m_log->roll(interval_start, interval_end)) {
      if (m_log->close_file()) {
        Error("Error closing LogFile %s: %s.", m_log->get_name(), strerror(errno));
      }

      if (reopen_after_rolling) {
        /* If we re-open now log file will be created even if there is nothing being logged */
        m_log->open_file();
      }

      return 1;
    }
  }

  return 0;
}

/*-------------------------------------------------------------------------
  LogFile::reopen_if_moved