Article View: comp.sys.mac
Article #25040Re: Philosophical programming question: handles
From: David Phillip Oster
Date: Sat, 13 Feb 1988 10:03
Date: Sat, 13 Feb 1988 10:03
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1479 bytes
In article <245@eagle_snax.UUCP> gpollice@eagle_snax.UUCP ( Sun ECD Software) writes:
>Actually, the concept of handles came from Xerox PARC many years ago.
Long, long before PARC ever existed, back in the '50s, Burroughs (now
Unisys) used this technique, like the Mac does, to manage all of memory.
Only, instead of a "master pointer" they called the same thing a "mother
descriptor". Their multi-tasking system allocated everybody's segments out
of the same heap. I've been wondering why multi-finder gives each
application its own heap instead of letting them all compete for pieces of
a single heap. Probably because more bad old applications would not have
run.
--- David Phillip Oster --A Sun 3/60 makes a poor Macintosh II.
Arpa: oster@dewey.soe.berkeley.edu --A Macintosh II makes a poor Sun 3/60.
Uucp: {uwvax,decvax,ihnp4}!ucbvax!oster%dewey.soe.berkeley.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!rutgers!umd5!purdue!gatech!bloom-beacon!husc6!bbn!uwmcsd1!ig!agate!ucbvax!dewey.soe.berkeley.edu!oster From: oster@dewey.soe.berkeley.edu (David Phillip Oster) Newsgroups: comp.sys.mac Subject: Re: Philosophical programming question: handles Keywords: handles, PARC Message-ID: <22965@ucbvax.BERKELEY.EDU> Date: 13 Feb 88 10:03:26 GMT References: <245@eagle_snax.UUCP> Sender: usenet@ucbvax.BERKELEY.EDU Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster) Organization: School of Education, UC-Berkeley Lines: 16