Re: Interrupts handling in ADA

[Niklas Holsti <niklas.holsti@tidorum.invalid>]

On 11-12-12 05:19 , anon@att.net wrote:
> --  Interrupts are not necessary. From you description a simple set of
> --  tasks is all that is needed.
> --
> --  This program outline uses three task to read three sockets and
> --  after pre-processing and verifing data (if needed) passes this
> --  data to a main task. The main task then can continue processing
> --  this data.

Just a small comment on a detail in the example:

>    task body Main is
...
>    begin
...
>          accept Acknowledge_1 ( Data : Unsigned_32 ) do
>            Task_1_Data := Data ;
>            -- process data from task 1
>          end Acknowledge_1 ;

The rendezvous between the Main task and task 1 continues until the "end 
Acknowledge_1". If the Main task processes the data from task 1 before 
the "end Acknowledge_1", as above, task 1 cannot do anything else during 
this processing. The program may be more responsive if the processing is 
done after the rendezvous, in this way:

         accept Acknowledge_1 ( Data : Unsigned_32 ) do
           Task_1_Data := Data ;
         end Acknowledge_1 ;
         -- process data from task 1

In this form, the call of Acknowledge_1 from task 1 returns before the 
processing, which means that task 1 can go on to do other things, while 
the Main task is processing the data in Task_1_Data.

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .