@@ -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)
{
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);
+ }
}
/**************************************************************/
@@ -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);
This will be useful in synchronous cancel emulation with bdrv_aio_cancel_async. Signed-off-by: Fam Zheng <famz@redhat.com> --- block.c | 12 +++++++++++- include/block/aio.h | 2 ++ 2 files changed, 13 insertions(+), 1 deletion(-)