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From: =?UTF-8?B?QmrDtnJuIEx1bmRpbg==?= <b.f.lundin@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: tasks in queue
Date: Thu, 09 Oct 2014 14:14:44 +0200
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Date: 2014-10-09T14:14:44+02:00
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On 2014-10-09 13:57, Stribor40 wrote:
> 
> But this explanation says also "the Ada definition does not specify which will be serviced first".
> also if in the main you have something like....
> 
> calling .....First_Task
> calling..... Second_Task
> calling......Third_Task
> 
> since this is sequentially executed doesn't that guarantee First_Task will run first?
> 

Well First_Task will be first to start, I think.
But imagine that the scheduler (on a single core machine) stops
First_Task, just after it started, and then gives
Second_Task enough time to complete a full
get-me-food circle.

Then the scheduler changes to the third task and lets it
complete a full circle.

Then First_Task is given attention again, so it could complete its cycle.

You then get Second, Third, and First.


-- 
--
Björn