From patchwork Sat Apr 30 03:33:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emilio Cota X-Patchwork-Id: 8986491 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 95F849F46D for ; Sat, 30 Apr 2016 03:34:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F328C201E4 for ; Sat, 30 Apr 2016 03:34:32 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 56AC9201CE for ; Sat, 30 Apr 2016 03:34:32 +0000 (UTC) Received: from localhost ([::1]:57154 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awLfo-0004TI-GS for patchwork-qemu-devel@patchwork.kernel.org; Fri, 29 Apr 2016 23:34:28 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59231) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awLfP-00044X-8c for qemu-devel@nongnu.org; Fri, 29 Apr 2016 23:34:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1awLf7-00005K-FR for qemu-devel@nongnu.org; Fri, 29 Apr 2016 23:33:57 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:59859) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1awLf6-0008TR-61 for qemu-devel@nongnu.org; Fri, 29 Apr 2016 23:33:45 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id 81B0A20A45 for ; Fri, 29 Apr 2016 23:33:20 -0400 (EDT) Received: from frontend2 ([10.202.2.161]) by compute4.internal (MEProxy); Fri, 29 Apr 2016 23:33:20 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=braap.org; h=cc :date:from:in-reply-to:message-id:references:subject:to :x-sasl-enc:x-sasl-enc; s=mesmtp; bh=++69TESzcsaOjLeBgpu5A5ETnv0 =; b=PQjJ3sJyf4kM9GdlRSni+0omkgwtnePDRvvYexyxK3F3FFWMZo83Vf4qfzx pLLT5BwkppZPt34xYY/5cdfwM06YyTW3N1g0LgZ0aNLXyuBTj1K9HqTkHa6lrs+1 VEPcHbKnRtN2GsGIYkgHDFIfXx+Rr6E+44fdvkU3tQM3RKZA= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=cc:date:from:in-reply-to:message-id :references:subject:to:x-sasl-enc:x-sasl-enc; s=smtpout; bh=++69 TESzcsaOjLeBgpu5A5ETnv0=; b=a7gpLHdDR/ud5WUKgt19HsxOZrc4lk2ZfLgW dt40+OSo/Rlcqo/dhF/jY8Fbr8qazFlfwrVX9BlfkoacpdkffR6kmQa/+Sq5wjGi kLsYTuJaKiNWjxhNDW8+n7uak6i1BrPSoonp5eQGJPzglNn7i6NfoUPLmBU+I/Ui 53YTVx0= X-Sasl-enc: 4Gbqbrx52l3kIkwgqLSSqaZpqDw4l1XFL9N1MIfvdFwL 1461987200 Received: from localhost (flamenco.cs.columbia.edu [128.59.20.216]) by mail.messagingengine.com (Postfix) with ESMTPA id 4973568022D; Fri, 29 Apr 2016 23:33:20 -0400 (EDT) From: "Emilio G. Cota" To: QEMU Developers , MTTCG Devel Date: Fri, 29 Apr 2016 23:33:08 -0400 Message-Id: <1461987197-31264-6-git-send-email-cota@braap.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1461987197-31264-1-git-send-email-cota@braap.org> References: <1461987197-31264-1-git-send-email-cota@braap.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 66.111.4.29 Subject: [Qemu-devel] [PATCH v4 05/14] atomics: add atomic_test_and_set 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 , Sergey Fedorov , Richard Henderson , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Peter Crosthwaite Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This new helper expands to __atomic_test_and_set where available; otherwise it expands to atomic_xchg. Signed-off-by: Emilio G. Cota Reviewed-by: Richard Henderson --- include/qemu/atomic.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h index 5bc4d6c..6132dad 100644 --- a/include/qemu/atomic.h +++ b/include/qemu/atomic.h @@ -134,6 +134,7 @@ }) /* Provide shorter names for GCC atomic builtins, return old value */ +#define atomic_test_and_set(ptr) __atomic_test_and_set(ptr, __ATOMIC_SEQ_CST) #define atomic_fetch_inc(ptr) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST) #define atomic_fetch_dec(ptr) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST) #define atomic_fetch_add(ptr, n) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST) @@ -328,6 +329,7 @@ #endif /* Provide shorter names for GCC atomic builtins. */ +#define atomic_test_and_set(ptr) atomic_xchg(ptr, true) #define atomic_fetch_inc(ptr) __sync_fetch_and_add(ptr, 1) #define atomic_fetch_dec(ptr) __sync_fetch_and_add(ptr, -1) #define atomic_fetch_add __sync_fetch_and_add