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From: simon@its63b.ed.ac.uk (Simon Brown)
Newsgroups: comp.lang.c,comp.unix.wizards
Subject: pointer alignment when int != char *
Message-ID: <493@its63b.ed.ac.uk>
Date: Mon, 22-Jun-87 04:39:37 EDT
Article-I.D.: its63b.493
Posted: Mon Jun 22 04:39:37 1987
Date-Received: Sat, 4-Jul-87 17:30:29 EDT
Reply-To: simon@its63b.ed.ac.uk (Simon Brown)
Organization: Computer Science Department, Edinburgh University
Lines: 23
Xref: mnetor comp.lang.c:2808 comp.unix.wizards:3096

If I were to want to implement malloc (or some such) on a machine where
sizeof(int) != sizeof(char *), how do I ensure that the pointer-values I
return are maximally aligned (eg, quad-aligned)? If sizeof(int)==sizeof(char *),
then I can cast the pointer to an int, do whatever arithmetic stuff is
required to it to get it to be aligned, then cast it back again - but of
course this won't work if information is lost by either of the casts.

Any hints?

(BTW, It's not really malloc I'm dealing with, I just lied about that one)

	%{
	    Simon!
	%}


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| Simon Brown 		         | UUCP:  seismo!mcvax!ukc!its63b!simon
| Department of Computer Science | JANET: simon@uk.ac.ed.its63b
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