Sounds like a job for select() unless I misunderstand your problem.

Kevin Kronmiller

In article <3A78357A.2BD8C0B1@avitech.de>,
  =?iso-8859-1?Q?J=FCrgen?= Grigat <juergen.grigat@avitech.de> wrote:
> Hi,
>
> we are developing a program in Ada that has connections to other
processes by
> sockets. The calls are done in Ada by using interfaces to C library
functions.
> In order to avoid polling we wonder if we can use the event mechanism
of X
> Toolkit  Intrinsics. So we created a task which is calling a C-
routine that
> itself calls XtAppMainLoop. The main program is an Ada routine.
> From the functional point of view this seems to work. But we
recognize a heavy
> CPU load even there is no traffic at the connection.
>
> Has anyone experience in using X Toolkit events in Ada tasking
programs?
>
> Thanks for any hints.
>
> J�rgen
>
>


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