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From: prindle@NADC
Newsgroups: net.lang.ada
Subject: re: propogation of exceptions
Message-ID: <8606061349.AA05201@ucbvax.Berkeley.EDU>
Date: Fri, 6-Jun-86 08:40:00 EDT
Article-I.D.: ucbvax.8606061349.AA05201
Posted: Fri Jun  6 08:40:00 1986
Date-Received: Sat, 7-Jun-86 14:22:31 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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True, if a task running independently is completed due to an unhandled
exception, that is the end of the line. But if a task is running because it
is engaged in a rendezvous, then the exception *is* propogated, not to the
task's parent, but to the calling task, just as in a subprogram call.

This is indicated in 11.5(a) of the LRM.

If a task must notify it's parent, it had better handle all anticipated
exceptions and utilize a user-defined method of error notification (e.g. a
call to an entry of an error task which maintains a global database of the
health of various tasks).

Frank Prindle
Prindle@NADC.arpa