Re: asynchronous task communication

[tmoran@acm.org]

> (I *do* need to deallocate the vectors, though.
  You can manually deallocate things you allocated with "new", but usually
one finds there's a LIFO structure to the allocation and deallocation, so
in Ada you don't usually "allocate" or "deallocate" but rather you declare
an object (in a block or a subprogram) and let the system clean up when
you leave the block/subprogram.
  procedure sub is
    x1, x2 : some_kind_of_object;
    ...
  begin
    ...
  end sub;
The system will "allocate" x1 and x2 on entry to the subprogram and
automatically "deallocate" them on exit.
  If "some_kind_of_object" is a "controlled type" then you can write a
"Finalize" procedure for that type which the system will call on the way
out of the subprogram.  If "some_kind_of_object" isn't itself controlled,
but is, say, an array or record or something containing object(s) of
controlled type, the Finalize for the individual entries will be called as
part of exiting the subprogram.