From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43680) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XUzOg-0006UF-4Y for qemu-devel@nongnu.org; Fri, 19 Sep 2014 10:43:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XUzOZ-00073k-QP for qemu-devel@nongnu.org; Fri, 19 Sep 2014 10:42:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:3367) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XUzOZ-00071g-GL for qemu-devel@nongnu.org; Fri, 19 Sep 2014 10:42:47 -0400 From: Stefan Hajnoczi Date: Fri, 19 Sep 2014 15:41:24 +0100 Message-Id: <1411137738-31280-6-git-send-email-stefanha@redhat.com> In-Reply-To: <1411137738-31280-1-git-send-email-stefanha@redhat.com> References: <1411137738-31280-1-git-send-email-stefanha@redhat.com> Subject: [Qemu-devel] [PULL 05/59] block: Add refcnt in BlockDriverAIOCB List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Fam Zheng , Stefan Hajnoczi From: Fam Zheng This will be useful in synchronous cancel emulation with bdrv_aio_cancel_async. Signed-off-by: Fam Zheng Signed-off-by: Stefan Hajnoczi --- block.c | 12 +++++++++++- include/block/aio.h | 2 ++ 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/block.c b/block.c index bcd952a..7f73ff0 100644 --- a/block.c +++ b/block.c @@ -4891,13 +4891,23 @@ void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs, acb->bs = bs; acb->cb = cb; acb->opaque = opaque; + acb->refcnt = 1; return acb; } +void qemu_aio_ref(void *p) +{ + BlockDriverAIOCB *acb = p; + acb->refcnt++; +} + void qemu_aio_release(void *p) { BlockDriverAIOCB *acb = p; - g_slice_free1(acb->aiocb_info->aiocb_size, acb); + assert(acb->refcnt > 0); + if (--acb->refcnt == 0) { + g_slice_free1(acb->aiocb_info->aiocb_size, acb); + } } /**************************************************************/ diff --git a/include/block/aio.h b/include/block/aio.h index 4603c0f..2626fc7 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -35,11 +35,13 @@ struct BlockDriverAIOCB { BlockDriverState *bs; BlockDriverCompletionFunc *cb; void *opaque; + int refcnt; }; void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs, BlockDriverCompletionFunc *cb, void *opaque); void qemu_aio_release(void *p); +void qemu_aio_ref(void *p); typedef struct AioHandler AioHandler; typedef void QEMUBHFunc(void *opaque); -- 1.9.3