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block: Add refcnt in BlockDriverAIOCB

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This will be useful in synchronous cancel emulation with
bdrv_aio_cancel_async.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2014-09-11 13:41:08 +08:00 • committed by Stefan Hajnoczi
parent 0d910cfeaf
commit f197fe2b2c
2 changed files with 13 additions and 1 deletions
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2
include/block/aio.h
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@ -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);