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Article View: comp.sys.amiga.tech
Article #13735

Re: resource tracking

#13735
From: Peter da Silva
Date: Fri, 16 Feb 1990 04:42
19 lines
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In article <5156@sugar.hackercorp.com> karl@sugar.hackercorp.com (Karl Lehenbauer) writes:
> Regular memory allocation calls probably happen ten thousand times more often
> than IPC stuff.  IPC is the exception...

On UNIX IPC is the exception. On the Amiga, IPC is the norm. Every system
call is actually a message passed to another program. All these messages have
to be tracked, and while it would have been possible to do this (say, by
passing a size with the message so the memory ownership could be handled
by the O/S), it wouldn't be easy. Think about what happens when a driver
replies to a task that's been killed.

Of course, the alternative is for the *task* to handle this, and that's really
no easier... but it's not such an unreasonable thing for Amiga to have left
out considering the circumstances.
-- 
 _--_|\  Peter da Silva <peter@sugar.hackercorp.com>.
/      \
\_.--._/ I haven't lost my mind, it's backed up on tape somewhere!
      v  "Have you hugged your wolf today?" `-_-'
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Message-ID: <5159@sugar.hackercorp.com>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!wuarchive!texbell!sugar!peter
References: <355.25C92297@weyr.FIDONET.ORG> <926@tardis.Tymnet.COM> <352@amgraf.UUCP> <5156@sugar.hackercorp.com>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!wuarchive!texbell!sugar!peter
From: peter@sugar.hackercorp.com (Peter da Silva)
Newsgroups: comp.sys.amiga.tech
Subject: Re: resource tracking
Keywords: Discipline, discipline
Message-ID: <5159@sugar.hackercorp.com>
Date: 16 Feb 90 04:42:20 GMT
References: <355.25C92297@weyr.FIDONET.ORG> <926@tardis.Tymnet.COM> <352@amgraf.UUCP> <5156@sugar.hackercorp.com>
Reply-To: peter@sugar.hackercorp.com (Peter da Silva)
Organization: Sugar Land Unix - Houston
Lines: 19