From: Eric Hodel <drbrain@...7.net>
Date: 2004-11-01T15:48:42+09:00
Subject: Re: Thread::list and GC

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Robert Klemme (bob.news@gmx.net) wrote:

>=20
> "Eric Hodel" <drbrain@segment7.net> schrieb im Newsbeitrag=20
> news:20041030190559.GB93473@segment7.net...
> >> But: this solution has a problem.  You can't ensure that it terminates.
> >> You will have to set some kind of flag somewhere that no new threads a=
re
> >> created anyway.  *If* you do that, you can just as easily wait once fo=
r=20
> >> all
> >> currently running threads *after* the flag has been set because you kn=
ow
> >> there will be no new threads.
> >
> >That flag is Thread.critical =3D true
> >
> >It will prevent the scheduling of other threads.  Note that starting a
> >new thread can switch to that thread, so be careful.
>=20
> That's the wrong flag.  This just prevents scheduling of threads on the=
=20
> thread scheduler level.  But what you really want in this scenario is a=
=20
> flag that tells the part of the application that creates new threads agai=
n=20
> and again to not do this any more.  If you use Thread.critical for this y=
ou=20
> could end up joining a thread that will not be scheduled and all the work=
=20
> that has to be done (i.e. all threads that are running and need to be=20
> terminated) will not be done; worse than that the process might freeze an=
d=20
> not terminate.
>=20
> Note: it *might* work, but IMHO it's the wrong hammer. :-)

I also forgot, setting Thread.critical to true, then joining another
thread may not resume the first thread...

--=20
Eric Hodel - drbrain@segment7.net - http://segment7.net
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