From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50076) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzPo1-0003t9-92 for qemu-devel@nongnu.org; Tue, 24 Jun 2014 08:26:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WzPnv-0002pV-3o for qemu-devel@nongnu.org; Tue, 24 Jun 2014 08:26:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44765) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzPnu-0002pJ-SK for qemu-devel@nongnu.org; Tue, 24 Jun 2014 08:26:27 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s5OCQQlj008119 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 24 Jun 2014 08:26:26 -0400 From: Fam Zheng Date: Tue, 24 Jun 2014 20:26:35 +0800 Message-Id: <1403612798-25167-2-git-send-email-famz@redhat.com> In-Reply-To: <1403612798-25167-1-git-send-email-famz@redhat.com> References: <1403612798-25167-1-git-send-email-famz@redhat.com> Subject: [Qemu-devel] [PATCH v3 1/4] blockjob: Add block_job_yield() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , stefanha@redhat.com This will unset busy flag and put coroutine to sleep, can be used to wait for QMP complete/cancel. Signed-off-by: Fam Zheng Reviewed-by: Eric Blake --- blockjob.c | 14 ++++++++++++++ include/block/blockjob.h | 8 ++++++++ 2 files changed, 22 insertions(+) diff --git a/blockjob.c b/blockjob.c index 7d84ca1..a85146a 100644 --- a/blockjob.c +++ b/blockjob.c @@ -210,6 +210,20 @@ void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns) job->busy = true; } +void block_job_yield(BlockJob *job) +{ + assert(job->busy); + + /* Check cancellation *before* setting busy = false, too! */ + if (block_job_is_cancelled(job)) { + return; + } + + job->busy = false; + qemu_coroutine_yield(); + job->busy = true; +} + BlockJobInfo *block_job_query(BlockJob *job) { BlockJobInfo *info = g_new0(BlockJobInfo, 1); diff --git a/include/block/blockjob.h b/include/block/blockjob.h index c0a7875..ac313ea 100644 --- a/include/block/blockjob.h +++ b/include/block/blockjob.h @@ -147,6 +147,14 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs, void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns); /** + * block_job_yield: + * @job: The job that calls the function. + * + * Yield the block job coroutine. + */ +void block_job_yield(BlockJob *job); + +/** * block_job_completed: * @job: The job being completed. * @ret: The status code. -- 2.0.0