From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: MPS: scroll-bars Date: Sun, 05 May 2024 21:09:53 +0300 Message-ID: <86bk5kceq6.fsf@gnu.org> References: <875xvvp3fo.fsf@gmail.com> <87r0eicht1.fsf_-_@gmail.com> <87plu29lcc.fsf@yahoo.com> <87fruyccs8.fsf@gmail.com> <878r0q9dzd.fsf@yahoo.com> <87a5l4r8xu.fsf@gmail.com> <86jzk8cipc.fsf@gnu.org> <87jzk8p26y.fsf@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29546"; mail-complaints-to="usenet@ciao.gmane.io" Cc: gerd.moellmann@gmail.com, luangruo@yahoo.com, emacs-devel@gnu.org To: Helmut Eller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun May 05 20:10:15 2024 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1s3gJS-0007R0-Ss for ged-emacs-devel@m.gmane-mx.org; Sun, 05 May 2024 20:10:15 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s3gJC-0005U2-9k; Sun, 05 May 2024 14:09:58 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s3gJA-0005Tl-Rb for emacs-devel@gnu.org; Sun, 05 May 2024 14:09:56 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s3gJA-0004Hg-I3; Sun, 05 May 2024 14:09:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=MJnu9IhrEbPYQTAo327xNaKs5423tMOlpcGRGXn+d1k=; b=QRxGuZHVMUtw 4SWuwwYmg5ikhFoql7/LqR6mejXmzTIHLx4k3M9pyIbh0rpcZa7aN4veZNkOmX3+DS44IEhhTgK3M YgJj8v20XPYzo/+SE8MvpE1vL2U845UQT2OIRvkJr930zalWhujvIhagO4EzwwKEFM3Zu9yYE4GRm xwN65WNZuAcGxE5LwREqbSCLtNDZ+/HauAnEjFMAekQ0O0VhjFYfwAch1eKGeyi41kRgYpna9rvbV 1QN9XRv4rhLk8wWC1VA2xp/7Z+C9ek6TcPUXZ6x64V5s3tGdX15hSKc7oVHwlGC+W72nopeXH2z/Y E40JI75Wb5PdZs/5E8nwug==; In-Reply-To: <87jzk8p26y.fsf@gmail.com> (message from Helmut Eller on Sun, 05 May 2024 20:02:13 +0200) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:318860 Archived-At: > From: Helmut Eller > Cc: gerd.moellmann@gmail.com, luangruo@yahoo.com, emacs-devel@gnu.org > Date: Sun, 05 May 2024 20:02:13 +0200 > > On Sun, May 05 2024, Eli Zaretskii wrote: > > > Can you tell, for my own education, what does a call to > > igc_xzalloc_ambig give us, as opposed to just xzalloc? > > igc_xzalloc_ambig allocates memory like xzalloc but it addition > registers it as root. When MPS starts scanning, it begins from the > roots. That means, we are sure that the referenced objects stay alive. > In the case of ambiguous references, the objects are also pinned > (i.e. don't move). > > That pinning part is not necessary for the scroll-bar case, but > igc_xzalloc_ambig is currently the easiest to use function available in > igc.h. Thanks, I think I get this.