220 38232 <5B0BFB66.7080501@gmx.net> article Path: news.gmane.org!.POSTED!not-for-mail From: Jens Maurer Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: memcpy/memset/etc overloads for volatile memory Date: Mon, 28 May 2018 14:51:50 +0200 Lines: 22 Approved: news@gmane.org Message-ID: <5B0BFB66.7080501@gmx.net> References: <420b274b-fc4b-413e-8ce9-b78131c782f7@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1527511787 30019 195.159.176.226 (28 May 2018 12:49:47 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 28 May 2018 12:49:47 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux i686; rv:6.0.1) Gecko/20110830 Thunderbird/6.0.1 To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDPMTYGK64JRB2PWV7MAKGQEYZU7VYY@isocpp.org Mon May 28 14:49:43 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wr0-f200.google.com ([209.85.128.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fNHap-0007ip-3Z for gclcip-std-proposals@m.gmane.org; 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[212.227.15.15]) by mx.google.com with ESMTPS id j143-v6si10608944wmf.72.2018.05.28.05.51.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 28 May 2018 05:51:52 -0700 (PDT) Received-SPF: pass (google.com: domain of jens.maurer@gmx.net designates 212.227.15.15 as permitted sender) client-ip=212.227.15.15; Original-Received: from [192.168.2.101] ([188.101.152.160]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0LwJFG-1gPMhV3KRy-0183Ft for ; Mon, 28 May 2018 14:51:51 +0200 In-Reply-To: <420b274b-fc4b-413e-8ce9-b78131c782f7@isocpp.org> X-Provags-ID: V03:K1:CrRnOh6TJplHKOst7/iYnljzFYut9pWquqtQgrM8gM36b/99TLa iIQBLiKah+4qkpMwUyUKoJQ45d0Q9vtEJ8kne8ZEL4CKkITfMpO46+nooM5Fj3f22dCl45G fXd9nZsCh9HAKmwUJ7AMPfI3KC9H6Gsudc571RM5kExW0prJpNvVNrxBYr6fHrc0eFjal8e RQmQ6wI8qolGcb1elEERQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:OFa8T034FsE=:ANqgyz1/g0kn1Yuf3MBhXz nwyEoiaVEADjl+sG7wYlqyJ7/+3lH44TjUIH6h3n+RgGhZl+lFqmTGJuC6e7iL1z4W/9H3GeP GUz4J6+WaOPHPz7c4hd1KtR9IkVhXFvfgyktlApUTek8ptdAoZYm7Zhg3Ktp57F2lonmSdGnb BaL3jZEoFOsDECwmRiSq/U2tc967bmvQA5WFMlRLf8usTFb7z4TP+JEWOicAwUYKoA7xu7Bjv GMGsj6sAZ62xsmzJ3gopeEMx80Bb8ITUCZVhlGz9e4DzAAKbQobHZrc1sGqWVbI0WqPR25Zlv gGfYtTmi45MryEjezYTRGbFHY7Y0nDW5hjN0LxY+YgSAnCtz1XamdIuvmdHELFa/tylZPe0S0 j9SrD6jAi2q6o/yTlM1hSPL/uqotcA3FG5hZsjo2siflQf8F6szN+/CwQ6KZ4sOEyFeV3rSdk /1vaTLis2FjBTGPU0bicQN+XsUD4x3eSSMDOWDS7w3pnoFkCoABCcAXKFIPAQpNJIYdX0Pphe o0XTJhFi52z2/zqR60RRt0Q/MYPRlLalbReig+1CWfdsv1g5gp/efC6gt9d9a66JCoORnULHc fMA8s9G/lHWjoev5YV9/WkjBk20G9faCvZCh15oHYljqC2LzSl5XfIQBoFLP/VuVNDnpwkAay SmqfqveLCcGuFeHx0zyW5kXQMKJ1ddmneu9uiavrHUaudxAu/i+SczYRoBl48AptEPFgmh9rt HOkZjb4PneN4zv0SosjiRrdGeWv+h1YJWMjbsT21ZXCa42J2kozYBwRMPHJ9UpFIRxS+GsbA X-Original-Sender: Jens.Maurer@gmx.net X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of jens.maurer@gmx.net designates 212.227.15.15 as permitted sender) smtp.mailfrom=Jens.Maurer@gmx.net Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:38232 Archived-At: On 05/28/2018 01:09 AM, Niall Douglas wrote: > Just there this weekend I, yet again, had to write a custom memcpy() > implementation because the built-in one can be elided by the compiler > during optimisation. I'd like to stop having to write memcpy() > personally. > > I think your idea has two variants: > > 1. Cannot be optimised out memcpy/memset/memmove etc. I'd suggest > secure_memset(), secure_memcpy(), secure_memmove() and so on rather > than editions taking a volatile pointer. ISO C11 has memset_s in K.3.7.4.1. Jens -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/5B0BFB66.7080501%40gmx.net. .