From nobody Thu Nov 6 22:56:54 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1543929838187306.8740044048236; Tue, 4 Dec 2018 05:23:58 -0800 (PST) Received: from localhost ([::1]:56713 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gUAg9-00040X-73 for importer@patchew.org; Tue, 04 Dec 2018 08:23:57 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54471) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gUAbA-000510-FA for qemu-devel@nongnu.org; Tue, 04 Dec 2018 08:18:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gUAb7-00024A-CO for qemu-devel@nongnu.org; Tue, 04 Dec 2018 08:18:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42348) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gUAb6-00021J-O9 for qemu-devel@nongnu.org; Tue, 04 Dec 2018 08:18:45 -0500 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 mx1.redhat.com (Postfix) with ESMTPS id 986F93086249 for ; Tue, 4 Dec 2018 13:18:43 +0000 (UTC) Received: from localhost (ovpn-112-31.ams2.redhat.com [10.36.112.31]) by smtp.corp.redhat.com (Postfix) with ESMTP id B93BE69116; Tue, 4 Dec 2018 13:18:35 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Date: Tue, 4 Dec 2018 17:17:59 +0400 Message-Id: <20181204131802.16885-4-marcandre.lureau@redhat.com> In-Reply-To: <20181204131802.16885-1-marcandre.lureau@redhat.com> References: <20181204131802.16885-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Tue, 04 Dec 2018 13:18:43 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 3/6] char: add a QEMU_CHAR_FEATURE_GCONTEXT flag X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , "Dr. David Alan Gilbert" , Markus Armbruster , peterx@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" The feature should be set if the chardev is able to switch GMainContext. Callers that want to put a chardev in a different thread context can/should check this capability. Otherwise, print an error (arguably, it may assert instead). Signed-off-by: Marc-Andr=C3=A9 Lureau --- include/chardev/char.h | 3 +++ chardev/char.c | 11 +++++++++++ 2 files changed, 14 insertions(+) diff --git a/include/chardev/char.h b/include/chardev/char.h index 7becd8c80c..014566c3de 100644 --- a/include/chardev/char.h +++ b/include/chardev/char.h @@ -47,6 +47,9 @@ typedef enum { QEMU_CHAR_FEATURE_FD_PASS, /* Whether replay or record mode is enabled */ QEMU_CHAR_FEATURE_REPLAY, + /* Whether the gcontext can be changed after calling + * qemu_chr_be_update_read_handlers() */ + QEMU_CHAR_FEATURE_GCONTEXT, =20 QEMU_CHAR_FEATURE_LAST, } ChardevFeature; diff --git a/chardev/char.c b/chardev/char.c index 152dde5327..123b566cba 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -196,6 +196,8 @@ void qemu_chr_be_update_read_handlers(Chardev *s, s->gcontext =3D context; if (cc->chr_update_read_handler) { cc->chr_update_read_handler(s); + } else if (s->gcontext) { + g_assert_not_reached(); } } =20 @@ -240,6 +242,15 @@ static void char_init(Object *obj) =20 chr->logfd =3D -1; qemu_mutex_init(&chr->chr_write_lock); + + /* + * Assume if chr_update_read_handler is implemented it will + * take the updated gcontext into account. + */ + if (CHARDEV_GET_CLASS(chr)->chr_update_read_handler) { + qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_GCONTEXT); + } + } =20 static int null_chr_write(Chardev *chr, const uint8_t *buf, int len) --=20 2.20.0.rc1