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From: seg@ingres.com (scott e garfinkle)
Newsgroups: comp.os.os2.programmer
Subject: Re: Killing threads
Message-ID: <1991Jun12.164046.23365@ingres.Ingres.COM>
Date: 12 Jun 91 16:40:45 GMT
References: <1991Jun8.234338.8440@fwi.uva.nl> <1991Jun11.174431.21270@ingres.Ingres.COM> <1991Jun12.003757.24023@netcom.COM>
Organization: Ask Computer Systems, Ingres Products Division
Lines: 19

>>...  It seems very likely, though,
>>that, at some point before gerneral availability of 2.0, the IBM kernel
>>group will make it possible for one thread to raise an exception in another
>>thread.  Then you will be able to kill off threads in a fairly orderly way.
>
>How will the threads be killed? Will there be a new system call, or
>what?

As I said, one way or another, you will be able to rais an excpetion in
another thread.  My assumption would be something like DosRaiseException
with a second argument.  By specifying the EH_NONCONTINUABLE flag and an
appropriate exception number, you could make sure that the target thread dies.
This way, you also give the target thread a chance to protect itself by
registering an excpetion handler.  Of course, the whole excpetion mechanism
is not real intuitive, but it's better than nothing.

It bears pointing out that I am in no way affiliated with IBM, and that
any statements made here are sheer speculation.
	-scott e. garfinkle