220 32073 <3664938a-c9b1-43fe-974c-194e116aca3d@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: erik.alapaa@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Add support for setting priority ceiling and/or priority inheritance on std::mutex Date: Tue, 11 Apr 2017 07:11:12 -0700 (PDT) Lines: 68 Approved: news@gmane.org Message-ID: <3664938a-c9b1-43fe-974c-194e116aca3d@isocpp.org> References: <41dc3025-be7f-4c6a-a61c-c21386f59169@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_9004_638609566.1491919872886" X-Trace: blaine.gmane.org 1491919877 28208 195.159.176.226 (11 Apr 2017 14:11:17 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 11 Apr 2017 14:11:17 +0000 (UTC) Cc: erik.alapaa@gmail.com To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDIOPWEDU4LRBAOIWPDQKGQE6JMLFVA@isocpp.org Tue Apr 11 16:11:08 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f197.google.com ([209.85.161.197]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cxwVg-00079m-9O for gclcip-std-proposals@m.gmane.org; Tue, 11 Apr 2017 16:11:08 +0200 Original-Received: by mail-yw0-f197.google.com with SMTP id m6sf63957642ywe.6 for ; Tue, 11 Apr 2017 07:11:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=8X5qnbjvxsPAuw4MWs3QuLRcKCRYuJmLilyCOCE1BjY=; b=fbaYXCW9WV+u7/ZAlmVXaT/bLlxg0wzIsLq21+E5phmsSzVYMdPh2S9ytA8zXGLC6/ At07lqBL3q1A9vm2msCT8r/hEtbj365SilnJwnhWUfJnpFviWivjrgqZSMWrR2NkWSjP dIxVr+c7qjuk9PuZ2QcZoYkiBhwxFuMHc0ZFRsRE2Jvs1dQT/Raf6uPfyZjwl6srXEYv u830WQQONzYNm0Xs00E/Fg9hsLp+P1/AtUnP/bx+BJjOr8afijD00/mpQ7p1N48Uxhh+ ooSVJturdwZ9aH5bVUQTkDxg/0E1NuvhJJklRZJqaGqPaZx0Phr/9/ZmeYXdWGb41dUw PGMg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=8X5qnbjvxsPAuw4MWs3QuLRcKCRYuJmLilyCOCE1BjY=; b=VEBsUHj8JiDm83qBwoaNRy1pkVuHMaMpak7SED59ddcUEJdCK1k8ssbB5GcS95Qg7S Pbp4g+5wjKhKYGxahS9UQ5MFun9XSkggBwLWwusZSF8dUnlcjviEprvqtbTzqN+h5x+l uLa7yoU4zPC954d3pUE8x4ReCgs7KJX9kg2Sd+PbBjnjJqfUwLwofnMGuTbMVT081GUN csy3mQ2iKuLMVwQiTHS9gl9ks2aqU+UNoKuTmMtyyw8OsgJ4hcXIxm4jnyI9uzs72nRw wJ7YTR7NpfCp4h20FgdjCu9WwWyiq9RiS98jKQ9YWRCD3QsT/1WXEcR1K6w0LhmUqePi yl1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version:x-original-sender:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=8X5qnbjvxsPAuw4MWs3QuLRcKCRYuJmLilyCOCE1BjY=; b=eRAo3emKUBemfFKpShckU+yDPMgJSEpndf8jesoPCjGPJmgLHb1kPCF8VIQKmutKPo A3jZ8jL1VX7R0sAqpbRGPnC7XW1S+ETJhI2aYJWImRVuVwUjquzU1BonieGGIgNSIWy/ Sn4oRN+1v7uMGrM3ZCGTHNCB8eRlEW3VS4FehhvgLdB34Q3+KWF6cVl5OTzzA708ckD7 ybAvtGYXxfOOBNcuwwQhN2oxLNy8cNtcazzwPiCIHJk/OV3vefLJo54PI/vlgtSVwsRg Q+akfNCUAsMXcoo+Ji/6CFbTynjii2JusGYdZEVpfp75dlJZGv1xhw56UtvzLsf+ZinK /Q6A== X-Gm-Message-State: AN3rC/6P5Lxx5/srkZYA3+Ucqx4cLx1SkGiPVNt4POrK0KQGW5IsPRpGBjCu68zXfNh6aw== X-Received: by 10.129.131.8 with SMTP id t8mr4269563ywf.171.1491919874123; Tue, 11 Apr 2017 07:11:14 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.60.44 with SMTP id q41ls15997214otc.20.gmail; Tue, 11 Apr 2017 07:11:13 -0700 (PDT) X-Received: by 10.157.32.20 with SMTP id n20mr561232ota.18.1491919873388; Tue, 11 Apr 2017 07:11:13 -0700 (PDT) In-Reply-To: X-Original-Sender: erik.alapaa@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: 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:32073 Archived-At: ------=_Part_9004_638609566.1491919872886 Content-Type: multipart/alternative; boundary="----=_Part_9005_780964635.1491919872887" ------=_Part_9005_780964635.1491919872887 Content-Type: text/plain; charset=UTF-8 OK, if we absolutely cannot have support for wrapping pthread mutexes in the std library, let's forget about that part. But having a way of requesting prio inheritance on a std::mutex would be necessary for some applications. With 'some', I mean almost all applications that share locks between threads of different priority. On Tuesday, April 11, 2017 at 3:52:28 PM UTC+2, Nicol Bolas wrote: > > And what about platforms that aren't POSIX? The standard has to provide > cross-platform behavior. > > A POSIX-specific wrapper is not a good idea for the standard library. It's > a fine idea for a regular library, though. And it's not hard to write a > POSIX mutex wrapper that is Lockable. > -- 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/3664938a-c9b1-43fe-974c-194e116aca3d%40isocpp.org. ------=_Part_9005_780964635.1491919872887 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
OK, if we absolutely cannot have support for wrapping pthr= ead mutexes in the std library, let's forget about that part. But havin= g a way of requesting prio inheritance on a std::mutex would be necessary f= or some applications. With 'some', I mean almost all applications t= hat share locks between threads of different priority.

<= br>On Tuesday, April 11, 2017 at 3:52:28 PM UTC+2, Nicol Bolas wrote:
And what about plat= forms that aren't POSIX? The standard has to provide cross-platform beh= avior.

A POSIX-specific wrapper is not a good idea for the standard = library. It's a fine idea for a regular library, though. And it's n= ot hard to write a POSIX mutex wrapper that is Lockable.

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+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/3664938a-c9b1-43fe-974c-194e116aca3d= %40isocpp.org.
------=_Part_9005_780964635.1491919872887-- ------=_Part_9004_638609566.1491919872886-- .