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 45D9AC4360C for ; Thu, 10 Oct 2019 07:03:19 +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 1721920B7C for ; Thu, 10 Oct 2019 07:03:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1721920B7C 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]:34500 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iISTl-0004hs-VR for qemu-devel@archiver.kernel.org; Thu, 10 Oct 2019 03:03:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47975) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iISQr-0002cc-Vq for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iISQq-00085p-Kk for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:17 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35382 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iISQq-00085Y-Gj for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:16 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9A6v8UK001015 for ; Thu, 10 Oct 2019 03:00:15 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2vhyfj0pvv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 10 Oct 2019 03:00:14 -0400 Received: from localhost by e06smtp04.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) Thu, 10 Oct 2019 08:00:10 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9A709ZP47513802 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Oct 2019 07:00:09 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AACE111C069; Thu, 10 Oct 2019 07:00:09 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3D21111C075; Thu, 10 Oct 2019 07:00:08 +0000 (GMT) Received: from localhost.in.ibm.com (unknown [9.124.35.97]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 10 Oct 2019 07:00:08 +0000 (GMT) From: Ganesh Goudar To: aik@ozlabs.ru, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Subject: [PATCH v16 1/7] Wrapper function to wait on condition for the main loop mutex Date: Thu, 10 Oct 2019 12:29:44 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20191010065950.23169-1-ganeshgr@linux.ibm.com> References: <20191010065950.23169-1-ganeshgr@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19101007-0016-0000-0000-000002B6C0A7 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19101007-0017-0000-0000-00003317CAE2 Message-Id: <20191010065950.23169-2-ganeshgr@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-10_03:, , 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=841 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100064 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 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