Re: [Qemu-devel] [PATCH v2 2/5] spice: notify on vm state change only via spice_server_vm_start/stop

[Gerd Hoffmann <kraxel@redhat.com>]

On 08/21/12 09:09, Yonit Halperin wrote:
> Hi,
> On 08/21/2012 09:58 AM, Gerd Hoffmann wrote:
>>    Hi,
>>
>>> +#if SPICE_SERVER_VERSION>= 0x000b02 /* 0.11.2 */
>>> +static void display_start(void)
>>> +{
>>> +    DisplayListItem *item;
>>> +
>>> +    QLIST_FOREACH(item,&display_list, link) {
>>> +        item->display->running = true;
>>> +    }
>>> +}
>>
>> I think we should simply use a global variable for 'running' here.  It's
>> global state anyway.  Having this in per-display state struct buys us
>> nothing and adds alot of code for updating and display list maintainance.
>>
> ok, good point.
>>>   void qemu_spice_vm_change_state_handler(void *opaque, int running,
>>>                                           RunState state)
>>>   {
>>> +#if SPICE_SERVER_VERSION<  0x000b02 /* before 0.11.2 */
>>>       SimpleSpiceDisplay *ssd = opaque;
>>
>>> +#if SPICE_SERVER_VERSION<  0x000b02 /* before 0.11.2 */
>>>      
>>> qemu_add_vm_change_state_handler(qemu_spice_vm_change_state_handler,&sdpy);
>>>
>>> +#endif
>>
>> If you don't register qemu_spice_vm_change_state_handler on new
>> spice-server you should #ifdef the whole function, not the body only.
>>
> qemu_spice_vm_change_state_handler is also called from qxl.c, as part of
> its own vm_change_state handler. I didn't want to add another ifdef there.

Fair point, but then you can drop the #ifdef for the
qemu_add_vm_change_state_handler call too.

cheers,
  Gerd