Commit f197fe2b authored by Fam Zheng's avatar Fam Zheng Committed by Stefan Hajnoczi
Browse files

block: Add refcnt in BlockDriverAIOCB 



This will be useful in synchronous cancel emulation with
bdrv_aio_cancel_async.

Signed-off-by: default avatarFam Zheng <famz@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 0d910cfe

block.c

+11 −1
Original line number Diff line number Diff line
@@ -4891,14 +4891,24 @@ 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;

    assert(acb->refcnt > 0);

    if (--acb->refcnt == 0) {

        g_slice_free1(acb->aiocb_info->aiocb_size, acb);

    }

}



/**************************************************************/

/* Coroutine block device emulation */

include/block/aio.h

+2 −0
Original line number Diff line number Diff line
@@ -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);