Article View: comp.std.c
Article #4497Re: Should free() take a pointer to const argument?
From: Tanmoy Bhattacharya
Date: Sun, 17 Dec 1995 17:53
Date: Sun, 17 Dec 1995 17:53
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In article <1995Dec16.001438.2515@grendel.demon.co.uk>, Jim Segrave <jes@grendel.demon.co.uk> writes: <snip> |> >Of course, if the byte values are identical, any reasonable interpretation of |> >the standard will say that the pointer is unchanged. |> |> One could imagine a CPU which had a virtual memory system tighly |> coupled to am allocator in which malloc() simply returned an index to |> some internal table within the CPU which mapped the memory. In this |> case, the object may have been copied, altered in size or packing or |> whatever, and given the same table entry. The pointer, viewed as a |> string of bytes would remain unchanged, the object pointed to might |> well have been moved and altered internally. When I meant unchanged, I meant only that other pointers pointing to the same place continue to remain valid. In the implementation you describe, I would call the object `unchanged'. Cheers Tanmoy -- tanmoy@qcd.lanl.gov(128.165.23.46) DECNET: BETA::"tanmoy@lanl.gov"(1.218=1242) Tanmoy Bhattacharya O:T-8(MS B285)LANL,NM87545 H:#9,3000,Trinity Drive,NM87544 Others see <gopher://yaleinfo.yale.edu:7700/00/Internet-People/internet-mail>, <http://alpha.acast.nova.edu/cgi-bin/inmgq.pl>or<ftp://csd4.csd.uwm.edu/pub/ internetwork-mail-guide>. -- <http://nqcd.lanl.gov/people/tanmoy/tanmoy.html> fax: 1 (505) 665 3003 voice: 1 (505) 665 4733 [ Home: 1 (505) 662 5596 ]
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Path: arc1-ca.pugleaf.net!qcd.lanl.gov!tanmoy From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya) Newsgroups: comp.std.c Subject: Re: Should free() take a pointer to const argument? Date: 17 Dec 1995 17:53:57 GMT Organization: Los Alamos National Laboratory Distribution: world Message-ID: <4b1lfl$4te@newshost.lanl.gov> References: <818898225snz@genesis.demon.co.uk> <4apkl2$8sp@rdsunx.crd.ge.com> <4apn8t$bs8@newshost.lanl.gov> <1995Dec16.001438.2515@grendel.demon.co.uk> NNTP-Posting-Host: qcd.lanl.gov