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bh=xknGgovBxYjUrLvzp1Eohp1Bhbd/29WkYh5O2I28ZM4=; b=RnixN2okvV0KWrPKm3L+Im3tFA4ktfZLdt6xZqLL4fB8c7PDfca/YiS9a1pQjNLG9PkFx2 8SI/flKY4Z5H/txAgHKh+39Y7Ad7iADGTIidF3zifMc+QvSuVuU+8zR1oO8K9Zd65ISP/7 SjbGGqrS2qFMSvbW99G68EueDiY9pIE= 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-85-NaLUUVSlMgWYdaCxFDeqYA-1; Fri, 09 Oct 2020 13:24:24 -0400 X-MC-Unique: NaLUUVSlMgWYdaCxFDeqYA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CBF6418BE169 for ; Fri, 9 Oct 2020 17:24:23 +0000 (UTC) Received: from [10.3.113.14] (ovpn-113-14.phx2.redhat.com [10.3.113.14]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5A58419D7C; Fri, 9 Oct 2020 17:24:20 +0000 (UTC) Subject: Re: [PATCH 03/12] qom: Make object_class_property_add_uint*_ptr() get offset To: Eduardo Habkost , qemu-devel@nongnu.org References: <20201009160122.1662082-1-ehabkost@redhat.com> <20201009160122.1662082-4-ehabkost@redhat.com> From: Eric Blake Autocrypt: addr=eblake@redhat.com; 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Message-ID: Date: Fri, 9 Oct 2020 12:24:19 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20201009160122.1662082-4-ehabkost@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="U4sRo2CWbh3RiQouaZSNN4TcGQJtTweYO" Received-SPF: pass client-ip=216.205.24.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/09 02:34:37 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.208, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: , Cc: Kevin Wolf , =?UTF-8?Q?Daniel_P=2e_Berrang=c3=a9?= , Markus Armbruster , =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --U4sRo2CWbh3RiQouaZSNN4TcGQJtTweYO Content-Type: multipart/mixed; boundary="g0DSJlBoBcBmbyI1dxxl3tVObrEoBQ52O"; protected-headers="v1" From: Eric Blake To: Eduardo Habkost , qemu-devel@nongnu.org Cc: Kevin Wolf , =?UTF-8?Q?Daniel_P=2e_Berrang=c3=a9?= , Markus Armbruster , Paolo Bonzini , =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= , John Snow Message-ID: Subject: Re: [PATCH 03/12] qom: Make object_class_property_add_uint*_ptr() get offset References: <20201009160122.1662082-1-ehabkost@redhat.com> <20201009160122.1662082-4-ehabkost@redhat.com> In-Reply-To: <20201009160122.1662082-4-ehabkost@redhat.com> --g0DSJlBoBcBmbyI1dxxl3tVObrEoBQ52O Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 10/9/20 11:01 AM, Eduardo Habkost wrote: > The existing object_class_property_add_uint*_ptr() functions are > not very useful, because they need a pointer to the property > value, which can't really be provided before the object is > created. >=20 > Replace the pointer parameter in those functions with a > `ptrdiff_t offset` parameter. >=20 > Include a uint8 class property in check-qom-proplist unit tests, > to ensure the feature is working. >=20 > Signed-off-by: Eduardo Habkost > --- > static void *pointer_property_get_ptr(Object *obj, PointerProperty *prop= ) > { > - return prop->ptr; > + if (prop->is_offset) { > + return (void *)obj + prop->offset; Addition on void* is a gcc extension. Does clang support it as well, or should you be casting to char* instead? > + } else { > + return prop->ptr; > + } > } > =20 > +++ b/tests/check-qom-proplist.c > @@ -61,6 +61,7 @@ struct DummyObject { > bool bv; > DummyAnimal av; > char *sv; > + uint8_t u8v; > }; > =20 > struct DummyObjectClass { > @@ -141,6 +142,9 @@ static void dummy_class_init(ObjectClass *cls, void *= data) > &dummy_animal_map, > dummy_get_av, > dummy_set_av); > + object_class_property_add_uint8_ptr(cls, "u8v", > + offsetof(DummyObject, u8v), > + OBJ_PROP_FLAG_READWRITE); I like how it turns out. --=20 Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org --g0DSJlBoBcBmbyI1dxxl3tVObrEoBQ52O-- --U4sRo2CWbh3RiQouaZSNN4TcGQJtTweYO Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEccLMIrHEYCkn0vOqp6FrSiUnQ2oFAl+AnMMACgkQp6FrSiUn Q2qFAQf/TL0kVXCRpfTdIEJ22x+D+2g6wRG77CRJKmLLO11Ip4WVWmHtiQr4i6s5 c8P0XTcS7l+rlAG6uGjspATQt4tKPYW0G/IPFCssez3vn0OgL2KrwUP6to58MB8h iVtEqKW1scxu6o+FVqXsfZ45/iKik+zMsk/7NuD8PiMSmMBHaWSdVF9Tx5Fvv4Yl neMf3gcLEl/YHEwAfJJLlTBla3RhzGFC4ULvw4zAyc/5HvFuir4hUCvQg9tDim6V gNHCE2EfP7dJzI24+1cMWt24SuRjrLDqmO+KpCsKHLKcBjaOiPCadXd4QI36JmEC Mf4wPZMGhVsffJ76/pNzUmLV5fhZLQ== =mI2Z -----END PGP SIGNATURE----- --U4sRo2CWbh3RiQouaZSNN4TcGQJtTweYO--