Re: Newbie: Task parametering

[Jacob Sparre Andersen <sparre@nbi.dk>]

Andrew Price wrote:
>> Andrew Price wrote:

>>>    type Task_Handle is access A_Task;  -- used to point to the task
>>>    Another_Task : Task_Handle;
>>>    type Data_Handle is access Task_Data; -- used to point to its data
>>>    Data_For_Task : Data_Handle;
>>>
>>>begin  -- The main prog will now spawn three of the above tasks
>>>
>>>    -- Parameterise the first task and then start it.
>>>    Data_For_Task := new Task_Data;
>>>    Data_For_Task.Name := "Task A  ";
>>>    Data_For_Task.Period := 0.5;
>>>    Data_For_Task.Repetitions := 5;
>>>    Another_Task := new A_Task(Data_For_Task);

> I thought that the task would not start running until the statement
>
> Another_Task := new A_Task(Data_For_Task);
>
> which occurs after the values in the Data_For_Task record have been
> set?

That is also my understanding.

> I originally wanted to just use multiple discriminants to initialise
> the task however I ran into compilation errors because
> "discriminants must have a discrete or access type" and I wanted to
> include a string among the initialising variables.

You would have to pass an access value to a string (constant) instead
of a string.  Or maybe an access to your Task_Data type.

Greetings,

Jacob
-- 
�I'm perfectly happy with my current delusional system.�
                                           -- Mirabel Tanner