Exemplo n.º 1
0
int logger_vprintf(LOGGER_HANDLE *log, const char* fmt, va_list ap)
{
  int result;
  my_off_t filesize;
  char cvtbuf[1024];
  size_t n_bytes;

  mysql_mutex_lock(&log->lock);
  if (log->rotations > 0)
    if ((filesize= my_tell(log->file, MYF(0))) == (my_off_t) -1 ||
        ((unsigned long long)filesize >= log->size_limit &&
         do_rotate(log)))
    {
      result= -1;
      errno= my_errno;
      goto exit; /* Log rotation needed but failed */
    }

  n_bytes= my_vsnprintf(cvtbuf, sizeof(cvtbuf), fmt, ap);
  if (n_bytes >= sizeof(cvtbuf))
    n_bytes= sizeof(cvtbuf) - 1;

  result= my_write(log->file, (uchar *) cvtbuf, n_bytes, MYF(0));

exit:
  mysql_mutex_unlock(&log->lock);
  return result;
}
Exemplo n.º 2
0
my_off_t my_b_append_tell(IO_CACHE* info)
{
  /*
    Sometimes we want to make sure that the variable is not put into
    a register in debugging mode so we can see its value in the core
  */
#ifndef DBUG_OFF
# define dbug_volatile volatile
#else
# define dbug_volatile
#endif

  /*
    Prevent optimizer from putting res in a register when debugging
    we need this to be able to see the value of res when the assert fails
  */
  dbug_volatile my_off_t res; 

  /*
    We need to lock the append buffer mutex to keep flush_io_cache()
    from messing with the variables that we need in order to provide the
    answer to the question.
  */
  mysql_mutex_lock(&info->append_buffer_lock);

#ifndef DBUG_OFF
  /*
    Make sure EOF is where we think it is. Note that we cannot just use
    my_tell() because we have a reader thread that could have left the
    file offset in a non-EOF location
  */
  {
    volatile my_off_t save_pos;
    save_pos = my_tell(info->file,MYF(0));
    my_seek(info->file,(my_off_t)0,MY_SEEK_END,MYF(0));
    /*
      Save the value of my_tell in res so we can see it when studying coredump
    */
    DBUG_ASSERT(info->end_of_file - (info->append_read_pos-info->write_buffer)
		== (res=my_tell(info->file,MYF(0))));
    my_seek(info->file,save_pos,MY_SEEK_SET,MYF(0));
  }
#endif  
  res = info->end_of_file + (info->write_pos-info->append_read_pos);
  mysql_mutex_unlock(&info->append_buffer_lock);
  return res;
}
Exemplo n.º 3
0
int logger_write(LOGGER_HANDLE *log, const char *buffer, size_t size)
{
  int result;
  my_off_t filesize;

  mysql_mutex_lock(&log->lock);
  if (log->rotations > 0)
    if ((filesize= my_tell(log->file, MYF(0))) == (my_off_t) -1 ||
        ((unsigned long long)filesize >= log->size_limit &&
         do_rotate(log)))
    {
      result= -1;
      errno= my_errno;
      goto exit; /* Log rotation needed but failed */
    }

  result= my_write(log->file, (uchar *) buffer, size, MYF(0));

exit:
  mysql_mutex_unlock(&log->lock);
  return result;
}