From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Allocators design flaw Date: Sat, 14 Oct 2017 17:44:25 +0200 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: MajGvm9MbNtGBKE7r8NgYA.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 Content-Language: en-US X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:48466 Date: 2017-10-14T17:44:25+02:00 List-Id: On 2017-10-14 17:18, Victor Porton wrote: > Dmitry A. Kazakov wrote: > >> On 2017-10-14 16:03, Victor Porton wrote: >>> Dmitry A. Kazakov wrote: >>> >>>> When freed use the stored offset to ^^^^^^^^^^^^^^^^^^^^^^^^ >>>> get the original address. ^^^^^^^^^^^^^^^^^^^^^^^^ >>> As far as I understand, it will not work, because the C library I am >>> writing bindings for may try to free an object allocated by me (or I my >>> need to free an object allocated by the library). >> >> The last sentence describes freeing memory, i.e. for Deallocate. > > I again state that we need the C function *_free() to free memory. But it is > impossible in your scenario, because you change the pointer to point to > another byte of memory. Re-read the last sentence of my response. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de