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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.lang.c,net.unix.wizards
Subject: Re: Packed Structures?
Message-ID: <3229@utzoo.UUCP>
Date: Tue, 4-Oct-83 18:57:41 EDT
Article-I.D.: utzoo.3229
Posted: Tue Oct  4 18:57:41 1983
Date-Received: Tue, 4-Oct-83 18:57:41 EDT
References: <274@sequel.UUCP>
Organization: U of Toronto Zoology
Lines: 10

Actually, all holes *don't* necessarily go away if you were to declare
something "packed" to a 16032 compiler that understood the notion.
The 16032 cannot guarantee to do copy-on-write memory management properly
unless things are aligned.  (The problem is that an unaligned data item
which crosses a page boundary from a read-write page to a read-only page
may get its first part stomped before the MMU realizes that the second
part is not writeable.)
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,linus,decvax}!utzoo!henry