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Re: [libvirt] [Qemu-devel] Re: Supporting hypervisor specific APIs in libvirt



On 03/26/2010 04:51 AM, Avi Kivity wrote:
On 03/26/2010 10:37 AM, Markus Armbruster wrote:

The importances of libqemu is:

1) Providing a common QMP transport implementation that is extensible
by third parties
2) Providing a set of common transports that support automatic
discovery of command line launched guests
3) Providing a generic QMP dispatch function
Adding to this C wrappers for QMP commands threatens to make QMP command
arguments part of the library ABI.  Compatible QMP evolution (like
adding an optional argument) turns into a libqmp soname bump.
Counter-productive.  How do you plan to avoid that?

You could make the API use QObjects; then you're completely isolated from high level protocol changes. Of course, this is less useful than the full API.

You want both. You want a very high level QObject based API and then you want automatically generated wrappers with C friendly data types. The later API loses a little bit but that's okay.

Regards,

Anthony Liguori


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