Subject: RE: MSC-News: Incomplete messages
From: Jan Docekal (jan.docekal#telelogic.se)
Date: Thu Aug 20 1998 - 07:11:48 GMT
The originator of this message is responsible for its content.
-----From Jan Docekal <jan.docekal#telelogic.se> to mscnews -----
Dear Dimitry,
It is correct.
Possible interpreatations follows:
Instance A sends message M to instance B. After M is sent, but before M
is recieved, B is (inexpectedly) terminated. Message B still knows that
it was on its way to B, but can no longer find it.
I think that the possibility to specify the reciever of the lost
messages is most useful when making a trace of a system execution,
rather than when specifying system behaviour.
/Best Regards,
Jan
> -----Original Message-----
> From: Dmitry Zhukov [SMTP:dmjr#ispras.ru]
> Sent: den 19 augusti 1998 15:01
> To: mscnews#sdl-forum.org
> Subject: MSC-news: Incomplete messages
>
> The originator of this message is responsible for its content.
> -----From Dmitry Zhukov <dmjr#ispras.ru> to mscnews -----
>
> Dear MSC community,
>
> I have a question of incomplete message events in MSC'96.
> Consider the following example from Recommendation Z.120,
> section 6.6:
>
> msc failure; inst Initiator, Responder;
> instance Initiator;
> condition Disconnected shared all;
> in ICONreq from env;
> set T;
> out ICON to lost Responder; /* output event */
> condition Wait_For_Resp shared all;
> timeout T;
> out IDISinf to env;
> condition Disconnected shared all;
> endinstance;
>
> instance Responder;
> condition Disconnected shared all;
> in ICON from Initiator; /* input event */
> condition Wait_For_Responder shared all;
> condition Disconnected shared all;
> endinstance;
> endmsc;
>
> As described in section 4.3,
>
> An incomplete message is a message which is either an output
> (where the input is lost) or an input (where the output is
> unknown)
>
> But in the example above the input is specified for the
> lost message ICON. How should one understand this example ?
> Is it correct ?
>
> Best regards,
> Dmitry
>
>
>
>
> -----End text from Dmitry Zhukov <dmjr#ispras.ru> to mscnews -----
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-----End text from Jan Docekal <jan.docekal#telelogic.se> to mscnews -----
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