Method is_open

sql/log.h:137–137

            enum cache_type io_cache_type_arg);
  void close(uint exiting);
  inline bool is_open() { return log_state != LOG_CLOSED; }
  const char *generate_name(const char *log_name, const char *suffix,
                            bool strip_ext, char *buff);
  int generate_new_name(char *new_name, const char *log_name, bool unique);