C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  overloading new() and delete() for a collection of classes          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message spipyeah Guest Posted: Fri Feb 27, 2004 6:10 pm    Post subject: overloading new() and delete() for a collection of classes When writing a C library, I typically export a routine to the client code can call to set the allocation and deallocation reoutines that my library should use. I'm having trouble doing the same with a C++ library I'm writing. My first instinct was to overload new and delete for my library namespace, but it still seemed to be conflicting with the global new and delete operators. Does this mean I should overload new & delete in every class my library contains, and within those overloaded operators use the allocation and deallocation routines that were set for my library? Thank you, spip [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Thomas Richter Guest Posted: Sun Feb 29, 2004 3:59 am    Post subject: Re: overloading new() and delete() for a collection of class Hi, Quote: When writing a C library, I typically export a routine to the client code can call to set the allocation and deallocation reoutines that my library should use. I'm having trouble doing the same with a C++ library I'm writing. My first instinct was to overload new and delete for my library namespace, but it still seemed to be conflicting with the global new and delete operators. Does this mean I should overload new & delete in every class my library contains, and within those overloaded operators use the allocation and deallocation routines that were set for my library? Hmm. Someone should really put this onto a FAQ. (-; One possible solution (that works in my practical application, exactly for a C++ library with custom allocators) is mentioned in the thread "Overloading the new operator" from Feb. 14th, on exactly this group. My posting to Kurt Stege presented one possible solution. Basically, you define a base class with a placement operator new all your objects are derived from that takes over the allocation. This placement operator takes a pool argument to perform the allocation. A suitable overloaded delete operator will return the memory to the pool. So long, Thomas [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ Language (Moderated) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.