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From: bison!jamesp@munnari.oz.au (James Pinakis)
Newsgroups: comp.sys.sun
Subject: Need help with SunOS LWP library
Keywords: SunOS
Message-ID: <1990Oct7.234632.8415@rice.edu>
Date: 7 Oct 90 21:30:00 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
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X-Sun-Spots-Digest: Volume 9, Issue 322, message 15

I am having huge troubles with SunOS's LWP library (using SunOS 4.0.3 on a
SS-1) and I would urgently like to hear anybody's experiences with using
this library.  In particular, I'm curious to find out whether anyone has
experienced the library failing to resume (using lwp_resume()) threads
which have been suspended (using lwp_suspend()).  I'm sure that the
threads are being suspended properly and that the call to lwp_resume() is
ok (i.e. it is called with a valid thread id) but sometimes the threads
just don't resume.  In a last ditch effort to fix my problem I tried to
get the thread to be suspended to wait on a message (using msg_recv()) and
then have the other thread restart it by sending it a message.  This
worked a little better, but the threads still frequently fail to
rendezvous and the program grinds to a halt.

I've had little success in finding out anyone's experiences with this
library.  Is this because no-one uses it?  Is it broken?  If so, are there
any other libraries which provide similar functions with the added novelty
of actually working?

james
jamesp@bison.cs.uwa.oz.au