From -3541468212836402007 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: ffc1e,b0722b5d78ee24fe X-Google-Attributes: gidffc1e,public X-Google-Thread: f78e5,25827c9ceb81badc X-Google-Attributes: gidf78e5,public From: "J. Van Damme" Subject: Re: string/cow/algorithm Date: 1998/09/04 Message-ID: <01bdd776$9c27aac0$LocalHost@tbox0108>#1/1 X-Deja-AN: 387784065 Approved: Fergus Henderson References: <35D9AE1C.7553@pratique.fr> <35e84662.881936868@nr1.toronto.istar.net> <6seoh1$rgk$1@nnrp1.dejanews.com> <6sh2rk$k1t$1@nnrp1.dejanews.com> <6sjua9$s9i$1@shell7.ba.best.com> <35eeb7e0.0@news.pacifier.com> Organization: EUnet Belgium, Leuven, Belgium X-Original-Date: 3 Sep 1998 20:13:37 GMT X-Auth: PGPMoose V1.1 PGP comp.std.c++ iQBFAgUANe+yUeEDnX0m9pzZAQEdzQF/eQ7gCSmCdBaJMbptJS5WvRxiOLrzJFLl d+S2CxhUbGIgZLZKa5Bz8gPSqOhEv+EM =Die/ Newsgroups: comp.std.c++,comp.programming.threads Marco Dalla Gasperina schreef in artikel <35eeb7e0.0@news.pacifier.com>... > Since reading this thread, I've been toying with an idea > of separating mutating/non-mutating methods into separate > classes. You can get a read/write-handle to an object by > querying it for read/write access. > > The read/write handle acts as a proxy to the object and maintains > a lock on the object until the handle goes out of scope. > > You can play some games in the locking strategy like > granting unlimited read handles if there are no write > handles out there. Seems to me that, beside narrowing it down to a single operation in the data, rather than sequences of operation on the data, you are talking about excactly the same thing I was talking about few days ago. However, since than I read about this same thing a couple of times in other entries in this group, and one seems to call these things . I don't think a Win32 system has these things, I think the people using them or perhaps Unix men. The read-write-lock Win32 misses is implementable, though. And I should think there must be numerous implementations. The one I did was in this news few days ago, a Delphi implementation (Re: Use of critical section). I did not know the thing seems to exist in other environments, at that time (I was foolish enough to think I had an idea. Oh well). Joris Van Damme --- [ 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://reality.sgi.com/austern_mti/std-c++/faq.html ]