220 33806 article Path: news.gmane.org!.POSTED!not-for-mail From: "'Jeffrey Yasskin' via ISO C++ Standard - Future Proposals" Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: string_view for fstream::open() Date: Thu, 10 Aug 2017 14:28:18 -0700 Lines: 29 Approved: news@gmane.org Message-ID: References: <1894906.unAOSKiKQz@tjmaciei-mobl1> <1712024.NjvlIh9J0q@tjmaciei-mobl1> 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 1502400523 26594 195.159.176.226 (10 Aug 2017 21:28:43 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 10 Aug 2017 21:28:43 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDDM34EO6QDRBCFAWPGAKGQELHYERGY@isocpp.org Thu Aug 10 23:28:35 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wr0-f198.google.com ([209.85.128.198]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfv0N-0006RX-14 for gclcip-std-proposals@m.gmane.org; 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[2a00:1450:400c:c0c::229]) by mx.google.com with ESMTPS id 16si6926059edz.282.2017.08.10.14.28.39 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 10 Aug 2017 14:28:39 -0700 (PDT) Received-SPF: pass (google.com: domain of jyasskin@google.com designates 2a00:1450:400c:c0c::229 as permitted sender) client-ip=2a00:1450:400c:c0c::229; Original-Received: by mail-wr0-x229.google.com with SMTP id 33so7313108wrz.4 for ; Thu, 10 Aug 2017 14:28:39 -0700 (PDT) X-Received: by 10.223.166.184 with SMTP id t53mr10961574wrc.265.1502400519104; Thu, 10 Aug 2017 14:28:39 -0700 (PDT) Original-Received: by 10.28.146.84 with HTTP; Thu, 10 Aug 2017 14:28:18 -0700 (PDT) In-Reply-To: <1712024.NjvlIh9J0q@tjmaciei-mobl1> X-Original-Sender: jyasskin@google.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=sRHU3AON; spf=pass (google.com: domain of jyasskin@google.com designates 2a00:1450:400c:c0c::229 as permitted sender) smtp.mailfrom=jyasskin@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com X-Original-From: Jeffrey Yasskin 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:33806 Archived-At: On Thu, Aug 10, 2017 at 8:59 AM, Thiago Macieira wrote: > On quarta-feira, 9 de agosto de 2017 16:21:37 PDT 'Jeffrey Yasskin' via ISO C+ > + Standard - Future Proposals wrote: >> > You can't do malloc(), since that might fail. You can't use new[] because >> > it might throw. You can't lock a mutex because that is not async signal >> > safe. >> Which are the low-level APIs that take null-terminated strings and are >> also async-signal-safe and failure-free? (If I needed >> exception-freedom I'd use new(nothrow) or catch the exception and turn >> it into a failure.) > > open(), readlink(), stat(), and their *at() versions, exec*, etc. > > See http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html > for the full list (http://man7.org/linux/man-pages/man7/signal-safety.7.html > too). All of those have long lists of failure conditions, often including ENOMEM. Adding "couldn't allocate user-space memory" doesn't seem like the end of the world. Jeffrey -- 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/CANh-dX%3D_vJGW1nxKEEjiSJ_%3D-%2BhkUab6i5KVSWJYe03ooBmnfA%40mail.gmail.com. .