From patchwork Wed Jun 16 11:56:51 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gautham R Shenoy X-Patchwork-Id: 55870 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 42CE8B7D43 for ; Wed, 16 Jun 2010 22:00:02 +1000 (EST) Received: from localhost ([127.0.0.1]:51158 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOrHi-0004v8-QA for incoming@patchwork.ozlabs.org; Wed, 16 Jun 2010 07:59:58 -0400 Received: from [140.186.70.92] (port=42357 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOrEq-0003BP-38 for qemu-devel@nongnu.org; Wed, 16 Jun 2010 07:57:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OOrEo-0007ZV-VA for qemu-devel@nongnu.org; Wed, 16 Jun 2010 07:56:59 -0400 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:54472) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OOrEo-0007YB-Cw for qemu-devel@nongnu.org; Wed, 16 Jun 2010 07:56:58 -0400 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.31.245]) by e23smtp06.au.ibm.com (8.14.4/8.13.1) with ESMTP id o5GBuldO008874 for ; Wed, 16 Jun 2010 21:56:47 +1000 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o5GBuq8D1777822 for ; Wed, 16 Jun 2010 21:56:52 +1000 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o5GBuqGv017092 for ; Wed, 16 Jun 2010 21:56:52 +1000 Received: from sofia.in.ibm.com (sofia.in.ibm.com [9.124.35.76]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id o5GBupfT017074; Wed, 16 Jun 2010 21:56:52 +1000 Received: from localhost.localdomain (localhost [IPv6:::1]) by sofia.in.ibm.com (Postfix) with ESMTP id 9D98EE4AF8; Wed, 16 Jun 2010 17:26:51 +0530 (IST) To: Qemu-development List From: Gautham R Shenoy Date: Wed, 16 Jun 2010 17:26:51 +0530 Message-ID: <20100616115651.10988.91292.stgit@localhost.localdomain> In-Reply-To: <20100616115404.10988.62371.stgit@localhost.localdomain> References: <20100616115404.10988.62371.stgit@localhost.localdomain> User-Agent: StGit/0.15-51-gc750 MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) Cc: Anthony Liguori , Avi Kivity , Corentin Chary , Paolo Bonzini Subject: [Qemu-devel] [PATCH V4 1/3] qemu: Add qemu-barrier support to qemu-thread framework. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Gautham R Shenoy --- qemu-thread.c | 23 +++++++++++++++++++++++ qemu-thread.h | 9 +++++++++ 2 files changed, 32 insertions(+), 0 deletions(-) diff --git a/qemu-thread.c b/qemu-thread.c index 3923db7..7c445b6 100644 --- a/qemu-thread.c +++ b/qemu-thread.c @@ -161,3 +161,26 @@ int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2) return pthread_equal(thread1->thread, thread2->thread); } +void qemu_barrier_init(QemuBarrier *barr1, int nr_threads) +{ + int err; + + err = pthread_barrier_init(&barr1->barr, NULL, nr_threads); + + if (err) { + error_exit(err, __func__); + } +} + +int qemu_barrier_wait(QemuBarrier *barr1) +{ + int ret; + + ret = pthread_barrier_wait(&barr1->barr); + + if (ret != 0 && ret != PTHREAD_BARRIER_SERIAL_THREAD) { + error_exit(ret, __func__); + } + + return ret; +} diff --git a/qemu-thread.h b/qemu-thread.h index 5ef4a3a..b3d36e0 100644 --- a/qemu-thread.h +++ b/qemu-thread.h @@ -15,9 +15,14 @@ struct QemuThread { pthread_t thread; }; +struct QemuBarrier { + pthread_barrier_t barr; +}; + typedef struct QemuMutex QemuMutex; typedef struct QemuCond QemuCond; typedef struct QemuThread QemuThread; +typedef struct QemuBarrier QemuBarrier; void qemu_mutex_init(QemuMutex *mutex); void qemu_mutex_lock(QemuMutex *mutex); @@ -31,10 +36,14 @@ void qemu_cond_broadcast(QemuCond *cond); void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex); int qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex, uint64_t msecs); +void qemu_barrier_init(QemuBarrier *barr, int nr_threads); + void qemu_thread_create(QemuThread *thread, void *(*start_routine)(void*), void *arg); void qemu_thread_signal(QemuThread *thread, int sig); void qemu_thread_self(QemuThread *thread); int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2); + +int qemu_barrier_wait(QemuBarrier *barr); #endif