Re: Multiple entry tasks

[Ted Dennison<dennison@telepath.com>]

In article <vOkD6.1839$D4.178910@www.newsranger.com>, Ted Dennison says...
>
>In article <9bkevj$61k$1@nh.pace.co.uk>, Marin David Condic says...
>>
>>select
>>    when (Entry2'Count <= 0) and (Entry1'Count <= 0) =>
>>        accept Entry3 ;
>
>or 
>
>>    when (Entry1'Count <= 0) =>
>>        accept Entry2 ;
>>or
>>    accept Entry1;
>>else
>>    terminate;
>>end select ;
>
>
>I don't think the guards get recalcuated when new entries come in, only when the
>top of the select statement is reached. Thus if nothing is available then, it
>will continue to wait indefinitely for Entry1, even if an Entry2 or Entry3 comes
>in later.


Doh! I misread the conditionals. If waiting occurs, all the guards will be
*open*. That should work fine (assuming the "or" is added, of course). If
multiple rendezvous become active before this task gets around to accepting one,
I suppose the priority principle could be violated. But that's a pretty marginal
case. 

---
T.E.D.    homepage   - http://www.telepath.com/dennison/Ted/TED.html
          home email - mailto:dennison@telepath.com