Thank you. And the SDKRef.pdf is really useful to me.
2014-06-02 21:52 GMT+08:00 Frank Mehnert <[email protected]>: > Hi Taowei, > > On Monday 02 June 2014 12:28:35 Taowei Luo wrote: > > Hi, I'm developing the vbox drivers for libvirt, with the vbox c api. > > > > I have a question. Is there any type conflict in vbox C API between > > different versions? > > > > For example, I have a var type named nsresult. In some C API versions, It > > defines nsresult as type PRUint32. Is it true that all nsresults (in > > different versions) will be defined as the same type PRUint32? > > > > I know it may be false for structs which have function pointers. But in > > other cases, especially basic types, is the type compatible with all c > api > > versions? > > nsresult is always PRUint32. Note that this code is always a status > code and will never include any pointer or similar. Values bigger > than 0x80000000 are used for errors, NS_OK is defined as 0. > > In general, the API will not differ between VBox versions of the same > stable branch but the API might change with a new major release. For > example, VBox 4.3.2 and 4.3.4 have the same API while VBox 4.2.2 and > 4.3.2 differ a bit. Usually the changes between different API versions > are small and all changes are documented in section 12 of the VirtualBox > SDK documentation (SDKRef.pdf, not UserManual.pdf!) > > Kind regards, > > Frank > -- > Dr.-Ing. Frank Mehnert | Software Development Director, VirtualBox > ORACLE Deutschland B.V. & Co. KG | Werkstr. 24 | 71384 Weinstadt, Germany > > Hauptverwaltung: Riesstr. 25, D-80992 München > Registergericht: Amtsgericht München, HRA 95603 > Geschäftsführer: Jürgen Kunz > > Komplementärin: ORACLE Deutschland Verwaltung B.V. > Hertogswetering 163/167, 3543 AS Utrecht, Niederlande > Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 > Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher > > _______________________________________________ > vbox-dev mailing list > [email protected] > https://www.virtualbox.org/mailman/listinfo/vbox-dev >
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