From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS, SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id CA3451F9FD for ; Sun, 14 Mar 2021 19:02:22 +0000 (UTC) Received: from localhost ([::1]:33346 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lLW0L-0007gB-DO for normalperson@yhbt.net; Sun, 14 Mar 2021 15:02:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60004) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lLW0H-0007fn-AC for bug-gnulib@gnu.org; Sun, 14 Mar 2021 15:02:17 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:48452) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lLW0E-0002rR-3o for bug-gnulib@gnu.org; Sun, 14 Mar 2021 15:02:16 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 0521C160086; Sun, 14 Mar 2021 12:02:12 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 5U9JRU-z-u4N; Sun, 14 Mar 2021 12:02:11 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 4E2EF1600A7; Sun, 14 Mar 2021 12:02:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id YYg4dVH8kpF8; Sun, 14 Mar 2021 12:02:11 -0700 (PDT) Received: from [192.168.1.9] (cpe-23-243-218-95.socal.res.rr.com [23.243.218.95]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 28480160086; Sun, 14 Mar 2021 12:02:11 -0700 (PDT) Subject: Re: tzalloc (was: Re: parse-datetime test failure on NetBSD) To: Bruno Haible References: <20210314082409.m6twfv5m5a4d7i42@yt.nih.at> <3906602.FhTxbKHIuy@omega> <0fb6e643-87d6-52b0-ea86-455500d76e61@cs.ucla.edu> <4335650.5adnljZN5I@omega> From: Paul Eggert Organization: UCLA Computer Science Department Message-ID: Date: Sun, 14 Mar 2021 12:02:10 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <4335650.5adnljZN5I@omega> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=131.179.128.68; envelope-from=eggert@cs.ucla.edu; helo=zimbra.cs.ucla.edu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bug-gnulib@gnu.org, Thomas Klausner Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: "bug-gnulib" On 3/14/21 11:33 AM, Bruno Haible wrote: > A close term is "multithread-safe". The API could be implemented in a > multithread-safe way, but time_rz.c is not multithread-safe, due to the > function 'change_env'. > > It is planned to provide a multithread-safe implementation at some point? My plan has been to add them eventually to glibc, where they would be multithread-safe. It'd be nice to also make them multithread-safe in Gnulib, so long as that doesn't make them harder to use with existing apps, all of which currently use these functions only in a single thread (which is why this is low priority). The only platform I know that currently has them is NetBSD, where I believe they're multithread-safe. I took the word "reentrant" from the "_r" suffix, which as you note is a bit of a misnomer here (though a widely used misnomer...).