The Wednesday 03 Sep 2014 à 19:23:36 (+0800), Fam Zheng wrote :
> This will be useful in synchronous cancel emulation with
> bdrv_aio_cancel_async.
>
> Signed-off-by: Fam Zheng <f...@redhat.com>
> ---
> block.c | 12 +++++++++++-
> include/block/aio.h | 2 ++
> 2 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/block.c b/block.c
> index cb670fd..78d68cb 100644
> --- a/block.c
> +++ b/block.c
> @@ -4885,13 +4885,23 @@ 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)
I would expect _release to change to _unref for symetry.
> {
> 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);
> --
> 2.1.0.27.g96db324
>
