From patchwork Fri Mar 22 06:33:49 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aravinda Prasad X-Patchwork-Id: 10864995 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CB23915AC for ; Fri, 22 Mar 2019 06:38:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A7B802A4AE for ; Fri, 22 Mar 2019 06:38:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9A5B92A4DB; Fri, 22 Mar 2019 06:38:44 +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=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4BED42A4AE for ; Fri, 22 Mar 2019 06:38:44 +0000 (UTC) Received: from localhost ([127.0.0.1]:52656 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h7DpD-00072Y-Gw for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 Mar 2019 02:38:43 -0400 Received: from eggs.gnu.org ([209.51.188.92]:46756) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h7Dkm-0003KP-SH for qemu-devel@nongnu.org; Fri, 22 Mar 2019 02:34:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h7Dkd-0000nW-MB for qemu-devel@nongnu.org; Fri, 22 Mar 2019 02:34:00 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:50920) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h7Dkd-0000mg-4s for qemu-devel@nongnu.org; Fri, 22 Mar 2019 02:33:59 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x2M6TrTE082033 for ; Fri, 22 Mar 2019 02:33:57 -0400 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0a-001b2d01.pphosted.com with ESMTP id 2rct640s68-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 22 Mar 2019 02:33:57 -0400 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 22 Mar 2019 06:33:54 -0000 Received: from b01cxnp23034.gho.pok.ibm.com (9.57.198.29) by e13.ny.us.ibm.com (146.89.104.200) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 22 Mar 2019 06:33:51 -0000 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x2M6XqH924510570 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 22 Mar 2019 06:33:53 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DC168124053; Fri, 22 Mar 2019 06:33:52 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 83419124054; Fri, 22 Mar 2019 06:33:50 +0000 (GMT) Received: from [127.0.1.1] (unknown [9.85.69.175]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Fri, 22 Mar 2019 06:33:50 +0000 (GMT) From: Aravinda Prasad To: aik@au1.ibm.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Date: Fri, 22 Mar 2019 12:03:49 +0530 In-Reply-To: <155323635511.18748.18133954505098138975.stgit@aravinda> References: <155323635511.18748.18133954505098138975.stgit@aravinda> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19032206-0064-0000-0000-000003BE85F5 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010793; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000281; SDB=6.01177898; UDB=6.00616222; IPR=6.00958596; MB=3.00026104; MTD=3.00000008; XFM=3.00000015; UTC=2019-03-22 06:33:52 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19032206-0065-0000-0000-00003CCCDE5C Message-Id: <155323642914.18748.10882970739268674736.stgit@aravinda> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-22_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=816 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1903220049 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH v7 2/6] 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: paulus@ozlabs.org, aravinda@linux.vnet.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 e83f72b..d9379e7 100644 --- a/cpus.c +++ b/cpus.c @@ -1858,6 +1858,11 @@ 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 f6ba78e..a6d20b0 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);