Re: Question about Streams and UDP sockets using GNAT.Sockets

["Randy Brukardt" <randy@rrsoftware.com>]

"Alex R. Mosteo" <devnull@mailinator.com> wrote in message
news:4i3r3nF215adU1@individual.net...
...
> I've workarounded this in past versions of GNAT using a direct call to the
> Write procedure in Ada.Streams, though you must use a Stream_Element_Array
> instead of a String. Doing so your array is transferred in a single call
> and packet. (Contrarily to using the 'Write attribute of
> Stream_Element_Array, that will also make a call for every element, which
> is very CPU expensive for large arrays).

If the type you are sending is more complex than a simple array, you
probably should try to use 'Write (Unchecked_Conversion won't necessarily
work on complex types). The best way to do it is to create a buffer stream
type that simply puts the bytes in a Stream_Element_Array. Then use the
direct call to the Write procedure of the socket stream.

We include such a type in Claw for this very reason. (Putting things into
the Clipboard or Registry must be done with a single write, so we have to
get all of the bytes together first.)

                           Randy.

                             Randy