Re: [Qemu-devel] Ongoing changes to the displaying code

[Anthony Liguori]

David Turner wrote:
> On Fri, Jan 9, 2009 at 6:16 PM, Ian Jackson <address@hidden 
> <mailto:address@hidden>> wrote:
>
>     I think it's fair enough for people to prefer SDL to VNC for a number
>     of reasons.  But why not just allow them to embed the qemu SDL window
>     in their application ?  This is definitely possible in X although I'm
>     not sure exactly how to do it with SDL.
>
>
> to be fair, that might not be an ideal solution. QEMU emulation 
> currently requires frequent SIGALRM signals.
> this means the application will not be able to use it for its own 
> needs, and a *lot* of system calls are going to
> randomly return EINTR, which a *lot* of code doesn't handle properly 
> (*cough* *cough* libesd.so)

Not to mention the fact that if you block too long or have long running 
computations, you'll cause great amounts of pain to the guest.  You also 
can't use main loops which makes gui integration pretty difficult.

It's really a bad environment for GUIs.  I understand the lack of desire 
to rewrite working code, but external GUIs are really the best technical 
solution for QEMU.

Regards,

Anthony Liguori

>     Ian.