From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8A16C433E1 for ; Sat, 18 Jul 2020 14:22:44 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B3F562073A for ; Sat, 18 Jul 2020 14:22:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="agQqSNtv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3F562073A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56964 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jwnjg-0001b1-1M for qemu-devel@archiver.kernel.org; Sat, 18 Jul 2020 10:22:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51128) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jwnj7-0001CL-GG for qemu-devel@nongnu.org; Sat, 18 Jul 2020 10:22:09 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:26669 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jwnj4-0005ij-GS for qemu-devel@nongnu.org; Sat, 18 Jul 2020 10:22:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1595082124; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:openpgp:openpgp; bh=CgYCHe5dlVqzGkGHy5oCmdZPNUZmtS7nOyEohSeUBxI=; b=agQqSNtvVzROXuS+sCPFXWfWy+X8rdmsLNCKH70VNDFhD/giNt2HAo/E5RjTdpxDtWvPO1 nO2zibM5AGeu7Fmi2tmqjMCSKNIvukP8PHcA1wvgjkCkDbk2MvhvMaKRIsgNI1MxxAW/m0 lPbWOR5nQ2+KR3WlK65hu0PdTY33jJY= 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-70-icYoae31NfyI-2sDBjEp0g-1; Sat, 18 Jul 2020 10:22:02 -0400 X-MC-Unique: icYoae31NfyI-2sDBjEp0g-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 130F58C4142; Sat, 18 Jul 2020 14:22:01 +0000 (UTC) Received: from thuth.remote.csb (ovpn-112-84.ams2.redhat.com [10.36.112.84]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 22963724A9; Sat, 18 Jul 2020 14:21:59 +0000 (UTC) Subject: Re: instance_init() and the realize() functions To: Pratik Parvati , qemu-devel@nongnu.org References: From: Thomas Huth Openpgp: preference=signencrypt Message-ID: Date: Sat, 18 Jul 2020 16:21:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=205.139.110.61; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/18 10:22:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 18/07/2020 09.09, Pratik Parvati wrote: > Hi team, > > Could someone please guild me to understand the difference > between *instance_init()* and the*realize()* functions? The > *class_init() *function is straight forward (it is similar to the > constructor in C++ OOP); But I am, finding hard to quote the difference > between *instance_init()* and *realize()*. > > What is the code flow when both functions are defined? Beside the other good answers that you've already got, maybe this helps a little bit, too: http://people.redhat.com/~thuth/blog/qemu/2018/09/10/instance-init-realize.html Cheers, Thomas