From 1348414663939835343 X-Google-Thread: f78e5,a10702d4a7db0a94 X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII Path: g2news2.google.com!news3.google.com!news.glorb.com!news.alt.net!comp-std-cpp-robomod!not-for-mail From: "James Kanze" Newsgroups: comp.std.c++ Subject: Re: Why no size_t to ::operator delete? Date: Wed, 3 Jan 2007 09:31:23 CST Organization: http://groups.google.com Lines: 36 Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <1167821807.522004.175740@k21g2000cwa.googlegroups.com> References: <12omt8jit7rl379@corp.supernews.com> <12pj4bamfkm0791@corp.supernews.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 1167821811 24465 127.0.0.1 (3 Jan 2007 10:56:51 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Wed, 3 Jan 2007 10:56:51 +0000 (UTC) Return-Path: X-Authentication-Warning: mulga.csse.unimelb.edu.au: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Original-To: std-c++@mailman.ucar.edu Delivered-To: std-c++@mailman.ucar.edu User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.0.1) Gecko/20020920 Netscape/7.0,gzip(gfe),gzip(gfe) Complaints-To: groups-abuse@google.com Injection-Info: k21g2000cwa.googlegroups.com; posting-host=62.160.54.162; posting-account=uN4QgA0AAAC_qk3WofNKjyjXNSBMXL2b X-Virus-Scanned: amavisd-new at ucar.edu X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au X-MIME-Autoconverted: from quoted-printable to 8bit by mulga.csse.unimelb.edu.au id l03AuvmX006676 X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au Xref: g2news2.google.com comp.std.c++:5242 Scott Meyers wrote: > Dave Harris wrote: > > With a scheme like that, can't you use: > > static char *s_top; // Initialise to heap somehow. > > void *operator new( size_t sz ) { > > void *result = s_top; > > s_top += sz; > > return result; > > } > > void operator delete( void *p ) { > > if (p) > > s_top = reinterpret_cast( p ); > > } > I can't think of any reason why this wouldn't work in this case. Alignment. But that's easy to fix (and may not be a problem, if all of the allocated objects are of types which have a size which is a multiple of the maximum alignment). -- James Kanze (GABI Software) email:james.kanze@gmail.com Conseils en informatique orient�e objet/ Beratung in objektorientierter Datenverarbeitung 9 place S�mard, 78210 St.-Cyr-l'�cole, France, +33 (0)1 30 23 00 34 --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.comeaucomputing.com/csc/faq.html ]