Method write_cache_raw

sql/log.cc:9722–9746

int Event_log::write_cache_raw(THD *thd, IO_CACHE *cache)
{
  DBUG_ENTER("Event_log::write_cache_raw");
  mysql_mutex_assert_owner(&LOCK_log);
  if (reinit_io_cache(cache, READ_CACHE, 0, 0, 0))
    DBUG_RETURN(ER_ERROR_ON_WRITE);

  IO_CACHE *file= get_log_file();
  IF_DBUG(size_t total= cache->end_of_file,);

  /*
    Note that for the first loop there is nothing to write if
    the full file fits into the cache.
  */
  do
  {
    size_t read_len= cache->read_end - cache->read_pos;
    int res= my_b_safe_write(file, cache->read_pos, read_len);
    if (unlikely(res))
      DBUG_RETURN(res);
    IF_DBUG(total-= read_len,);
  } while (my_b_fill(cache));
  DBUG_ASSERT(total == 0);
  DBUG_RETURN(0);
}

/*
  Write the contents of a cache to the binary log.