struct ctl_acl_data
{
  struct ctl_csn_cwin    *ad_cc;
  struct SignalSemaphore  ad_dsem;
  WORD                    ad_spad;
  struct BitMap          *ad_bm;
  struct GfxBase         *ad_gb;
  struct Task            *ad_task;
  void                  (*ad_forbid)();
  void                  (*ad_permit)();
  volatile LONG           ad_cnt;
  struct ctl_csn_ient     ad_ev;
  LONG                    ad_rectx;
  LONG                    ad_recty;
  LONG                    ad_logox;
  LONG                    ad_logoy;
  LONG                    ad_startx;
  LONG                    ad_starty;
  LONG                    ad_bmapx;
  LONG                    ad_bmapy;
};

ad_cc    -  One  of  the console windows that  the  logo is now  associated
            with.

ad_dsem  -  Semaphore  that is being used to arbitrate logo refreshing such
            as when refreshing subtasks were spawned in parallel.

ad_spad  -  Semaphore  aligner so  the  rest of  members is  LONG  aligned.

ad_bm    -  Logo  bitmap. This is  usually in standard Amiga format, but no
            guarantee that it actually is.

ad_gb    -  Locally buffered GfxBase. Used  to pass across subtasks so they
            can access graphics.library functions quickly.

ad_task  -  A  subtask  that will be  signalled after  local  exception  is
            complete. This very subtask will be the refresher!

ad_forbid
         -  Wrapper function used on OS with console.device V39 and less to
            fix race  condition that may occurr when  rendering to window's
            RastPort that is owned by the console handler.

ad_permit
         -  See ad_forbid for more details.

ad_cnt   -  Safety  counter, so there is a limit on parallel subtasks which
            prevents mess.

ad_ev    -  IDCMP_REFRESHWINDOW event carry.

ad_rectx -  Total rendition area in X axis available to the logo. This acts
            as a trimmer.

ad_recty -  Total rendition area in Y axis available to the logo. This acts
            as a trimmer.

ad_logox -  Effective rendition area  for X  axis. This gets  computed from
            ad_rectx, ad_startx, and ad_bmapx.

ad_logoy -  Effective rendition area  for Y  axis. This gets  computed from
            ad_recty, ad_starty, and ad_bmapy.

ad_startx
         -  X coordinate  to start drawing at. This  gets copied from func.
            input.

ad_starty
         -  Y coordinate  to start drawing at. This  gets copied from func.
            input.

ad_bmapx -  Logo bitmap size in pixels for X axis. This gets extracted with
            the help of graphics.library.

ad_bmapy -  Logo bitmap size in pixels for Y axis. This gets extracted with
            the help of graphics.library.