Re: [Qemu-block] [Qemu-devel] [PULL 27/37] block: extract AIO_WAIT_WHILE() from BlockDriverState

[Eric Blake]

On 03/02/2018 12:54 PM, Kevin Wolf wrote:
> From: Stefan Hajnoczi <address@hidden>
>
> BlockDriverState has the BDRV_POLL_WHILE() macro to wait on event loop
> activity while a condition evaluates to true.  This is used to implement
> synchronous operations where it acts as a condvar between the IOThread
> running the operation and the main loop waiting for the operation.  It
> can also be called from the thread that owns the AioContext and in that
> case it's just a nested event loop.
>
> BlockBackend needs this behavior but doesn't always have a

> Signed-off-by: Stefan Hajnoczi <address@hidden>
> Reviewed-by: Eric Blake <address@hidden>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---

> +++ b/include/block/block.h
> @@ -2,6 +2,7 @@
>   #define BLOCK_H
>   
>   #include "block/aio.h"
> +#include "block/aio-wait.h"
>   #include "qapi-types.h"

Will need a minor rebase now that commit 9af23989 has renamed qapi-types.h.

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org