From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by sourceware.org (Postfix) with ESMTP id 26F55386184C for ; Wed, 3 Mar 2021 17:18:13 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 26F55386184C Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-559-92gbruIDO5m0o1iBZUqHoQ-1; Wed, 03 Mar 2021 12:18:11 -0500 X-MC-Unique: 92gbruIDO5m0o1iBZUqHoQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E761E835E22; Wed, 3 Mar 2021 17:18:09 +0000 (UTC) Received: from localhost (unknown [10.33.37.30]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7EF3460BD9; Wed, 3 Mar 2021 17:18:09 +0000 (UTC) Date: Wed, 3 Mar 2021 17:18:08 +0000 From: Jonathan Wakely To: Thiago Macieira Cc: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: Re: [PATCH 1/5] std::latch: reduce internal implementation from ptrdiff_t to int Message-ID: References: <1968544.UC5HiB4uFJ@tjmaciei-mobl1> <20210226155937.621324-1-thiago.macieira@intel.com> <20210303143426.GS3008@redhat.com> <2106072.b53mCu53De@tjmaciei-mobl1> MIME-Version: 1.0 In-Reply-To: <2106072.b53mCu53De@tjmaciei-mobl1> X-Clacks-Overhead: GNU Terry Pratchett X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Mar 2021 17:18:14 -0000 On 03/03/21 09:14 -0800, Thiago Macieira via Libstdc++ wrote: >On Wednesday, 3 March 2021 06:34:26 PST Jonathan Wakely wrote: >> On 26/02/21 07:59 -0800, Thiago Macieira via Libstdc++ wrote: >> >ints can be used as futex on Linux. ptrdiff_t on 64-bit Linux can't. >> >> Yes, we should do this for GCC 11. > >Want me to re-submit this one alone, with the "alignas(4)" with a commend >indicating it's what the kernel requires? Yes please.