Re: [Qemu-devel] [PATCH v3 02/10] main-loop: switch to g_poll() on POSIX hosts

[Fabien Chouteau]

On 02/04/2013 06:35 PM, Paolo Bonzini wrote:
> Il 04/02/2013 16:07, Stefan Hajnoczi ha scritto:
>>>> No idea why the windows version has been mixing g_poll() and select().
>>>> I'd hope that this series kills select() for uniformity's sake, but the
>>>> 00/10 subject and the commit msg for this patch indicate otherwise.
>> This is why I CCed Fabien.  I left the g_poll-followed-by-select
>> behavior.  It may be to do with Windows treating sockets different from
>> other objects.  Paolo may know the answer, too.
>>
>
> Yes, indeed.
>
> Windows uses g_poll for HANDLEs and select for sockets.  All sockets are
> configured to trigger an event handle when there is a change in the
> socket availability, so g_poll exits and select is reexecuted.
>

Yes, the reason for this select() call is that we know when an event
occurred on one socket, but we don't know what kind of event and which
socket.

Would it be different if we had a HANDLE for each socket, instead of
one for all?

-- 
Fabien Chouteau