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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 A2BB7C47404 for ; Wed, 9 Oct 2019 21:32:46 +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 794B4206BB for ; Wed, 9 Oct 2019 21:32:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 794B4206BB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59122 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIJZc-00027A-Vs for qemu-devel@archiver.kernel.org; Wed, 09 Oct 2019 17:32:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50038) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iI7zi-0002fh-RD for qemu-devel@nongnu.org; Wed, 09 Oct 2019 05:10:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iI7zh-0004Jt-RG for qemu-devel@nongnu.org; Wed, 09 Oct 2019 05:10:54 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:36232) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iI7zh-0004Ja-Jz for qemu-devel@nongnu.org; Wed, 09 Oct 2019 05:10:53 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9998Nv4030496 for ; Wed, 9 Oct 2019 05:10:51 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vhbamu00j-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 09 Oct 2019 05:10:51 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 9 Oct 2019 10:10:44 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x999AhdA30802114 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 9 Oct 2019 09:10:43 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C3095A4067; Wed, 9 Oct 2019 09:10:43 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA0B3A405F; Wed, 9 Oct 2019 09:10:40 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.199.35.233]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 9 Oct 2019 09:10:40 +0000 (GMT) From: Ganesh Goudar To: aik@ozlabs.ru, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Subject: [PATCH v15 1/7] Wrapper function to wait on condition for the main loop mutex Date: Wed, 9 Oct 2019 14:40:04 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20191009091010.16467-1-ganeshgr@linux.ibm.com> References: <20191009091010.16467-1-ganeshgr@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19100909-0008-0000-0000-0000032061E3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19100909-0009-0000-0000-00004A3F65BA Message-Id: <20191009091010.16467-2-ganeshgr@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-09_04:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=903 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910090087 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 X-Mailman-Approved-At: Wed, 09 Oct 2019 16:05:32 -0400 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: paulus@ozlabs.org, arawinda.p@gmail.com, groug@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Aravinda Prasad 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. This wrapper is required because qemu_global_mutex is a static variable. Signed-off-by: Aravinda Prasad Reviewed-by: David Gibson Reviewed-by: Greg Kurz --- cpus.c | 5 +++++ include/qemu/main-loop.h | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/cpus.c b/cpus.c index d2c61ff155..f84b54943d 100644 --- a/cpus.c +++ b/cpus.c @@ -1886,6 +1886,11 @@ 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 f6ba78ea73..a6d20b0719 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -295,6 +295,14 @@ void qemu_mutex_lock_iothread_impl(const char *file, int line); */ 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); -- 2.17.2