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Date: Fri, 11 Dec 2009 14:55:54 -0800
From: Chris Wright <chrisw@sous-sol.org>
Subject: Re: [Qemu-devel] Spice project is now open
Message-ID: <20091211225554.GA4934@sequoia.sous-sol.org>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Yaniv Kamay <ykamay@redhat.com>, Izik Eidus <ieidus@redhat.com>, qemu-devel@nongnu.org

* Anthony Liguori (anthony@codemonkey.ws) wrote:
> Izik Eidus wrote:
>> Ok, I guess you think VDI-interfaces are doing much more than they do
>> in reiality.
>>
>> It is just simple interface to Allow Spice / VNC / whatever not have to
>> de-duplicate code in order to get information from - lets say the
>> keyboard....
>>
>> Is it really diffrence from any other function callbacks that used for
>> such purpuse?
>>   
>
> Plugin interfaces have been discussed a few times in the past.  The  
> concerns have been 1) they will be abused with the introduction of  
> proprietary plugins 2) we would have tremendous difficulty maintaining a  
> stable plugin abi 3) they would create stability issues in qemu because  
> the plugin quality cannot be controlled.

I think you're talking about dlopen() vs. direct linkage of .so?

Here's some code to ground things a bit.

ifdef CONFIG_SPICE
CFLAGS+=$(SPICE_CFLAGS)
LIBS+=$(SPICE_LIBS)
endif

And specifically, there's a notion of the VDI interface added to
core qemu, which can be extended by simply registering callbacks to that
interface:

vl.c::main()
...
#ifdef CONFIG_SPICE
	...
	spice_init(&core_interface);.
#endif

thanks,
-chris