From patchwork Fri Aug 18 10:07:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aravinda Prasad X-Patchwork-Id: 9908219 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8767E60382 for ; Fri, 18 Aug 2017 10:09:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 792CA27EED for ; Fri, 18 Aug 2017 10:09:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6DDE0284B5; Fri, 18 Aug 2017 10:09:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 0640327EED for ; Fri, 18 Aug 2017 10:09:15 +0000 (UTC) Received: from localhost ([::1]:40526 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dieDK-0002bC-Re for patchwork-qemu-devel@patchwork.kernel.org; Fri, 18 Aug 2017 06:09:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60104) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dieBq-0002Xf-JS for qemu-devel@nongnu.org; Fri, 18 Aug 2017 06:07:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dieBn-00081A-FD for qemu-devel@nongnu.org; Fri, 18 Aug 2017 06:07:42 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45078) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dieBn-00080N-6i for qemu-devel@nongnu.org; Fri, 18 Aug 2017 06:07:39 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v7IA4G2Q068189 for ; Fri, 18 Aug 2017 06:07:38 -0400 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cdu12s2re-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 18 Aug 2017 06:07:38 -0400 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 18 Aug 2017 06:07:34 -0400 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v7IA7OdH23986262; Fri, 18 Aug 2017 10:07:24 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 99F08124049; Fri, 18 Aug 2017 06:04:46 -0400 (EDT) Received: from [127.0.1.1] (unknown [9.77.197.54]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP id EC08A124044; Fri, 18 Aug 2017 06:04:43 -0400 (EDT) From: Aravinda Prasad To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Date: Fri, 18 Aug 2017 15:37:20 +0530 In-Reply-To: <150305073858.13788.4068645609072927349.stgit@aravinda> References: <150305073858.13788.4068645609072927349.stgit@aravinda> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 17081810-0024-0000-0000-000002C173C2 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007566; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000223; SDB=6.00904045; UDB=6.00452940; IPR=6.00684258; BA=6.00005538; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00016752; XFM=3.00000015; UTC=2017-08-18 10:07:35 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17081810-0025-0000-0000-00004522CCC7 Message-Id: <150305084044.13788.5372260244200170325.stgit@aravinda> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-08-18_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1708180159 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH v4 3/5] Wrapper function to wait on condition for the main loop mutex 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: aik@ozlabs.ru, benh@au1.ibm.com, paulus@samba.org, sam.bobroff@au1.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Introduce a wrapper function to wait on condition for the main loop mutex. This function atomically releases the main loop mutex and causes the calling thread to block on the condition. Signed-off-by: Aravinda Prasad --- cpus.c | 5 +++++ include/qemu/main-loop.h | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/cpus.c b/cpus.c index 9bed61e..9712013 100644 --- a/cpus.c +++ b/cpus.c @@ -1589,6 +1589,11 @@ void qemu_mutex_unlock_iothread(void) qemu_mutex_unlock(&qemu_global_mutex); } +void qemu_cond_wait_iothread(QemuCond *cond) +{ + qemu_cond_wait(cond, &qemu_global_mutex); +} + static bool all_vcpus_paused(void) { CPUState *cpu; diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 6b4b60b..618cb2f 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -279,6 +279,14 @@ void qemu_mutex_lock_iothread(void); */ void qemu_mutex_unlock_iothread(void); +/** + * qemu_cond_wait_iothread: Wait on condition for the main loop mutex + * + * This function atomically releases the main loop mutex and causes + * the calling thread to block on the condition. + */ +void qemu_cond_wait_iothread(QemuCond *cond); + /* internal interfaces */ void qemu_fd_register(int fd);