libvirt/src/vbox
Jim Meyering 1867004ed1 vbox_tmpl.c: remove useless array-is-non-NULL comparisons
* src/vbox/vbox_tmpl.c (vboxStorageVolDelete): Remove always-true
array-is-non-NULL test.  git grep 'key\[.*\];'|grep -F .h
src/datatypes.h:    char key[PATH_MAX];
(vboxStorageVolGetInfo): Likewise.
(vboxStorageVolGetXMLDesc): Likewise.
(vboxStorageVolGetPath): Likewise.
(vboxDomainDefineXML): Likewise. (but now with "mac[]")
2010-01-18 13:31:47 +01:00
..
README
vbox_CAPI_v2_2.h
vbox_CAPI_v3_0.h VBox 3.0.6 API change support 2009-09-14 12:12:53 +02:00
vbox_CAPI_v3_1.h vbox: Update IIDs from version 3.1-beta2 to 3.1-final 2009-12-07 22:46:50 +01:00
vbox_driver.c vbox: include required headers 2010-01-18 09:50:08 +01:00
vbox_driver.h
vbox_tmpl.c vbox_tmpl.c: remove useless array-is-non-NULL comparisons 2010-01-18 13:31:47 +01:00
vbox_V2_2.c
vbox_V3_0.c Add support for VBox 3 and event callbacks on vbox 2009-07-24 18:12:16 +02:00
vbox_V3_1.c vbox: Add support for version 3.1 2009-12-04 14:49:45 +01:00
vbox_XPCOMCGlue.c remove all trailing blank lines 2009-07-16 15:06:42 +02:00
vbox_XPCOMCGlue.h remove all trailing blank lines 2009-07-16 15:06:42 +02:00

    Explanation about the how multi-version support
    for VirtualBox libvirt driver is implemented.

Since VirtualBox adds multiple new features for each release, it is but
natural that the C API which VirtualBox exposes is volatile across
versions and thus needs a good mechanism to handle multiple versions
during runtime. The solution was something like this:

Firstly the file structure is as below:

vbox_CAPI_v2_2.h
vbox_XPCOMCGlue.h
vbox_XPCOMCGlue.c
These files are C API/glue code files directly taken from the
VirtualBox OSE source and is needed for C API to work as expected.

vbox_driver.h
vbox_driver.c
These files have the main logic for registering the virtualbox driver
with libvirt.

vbox_V2_2.c
The file which has version dependent changes and includes the template
file for given below for all of its functionality.

vbox_tmpl.c
The file where all the real driver implementation code exists.

Now there would be a vbox_V*.c file (for eg: vbox_V2_2.c for V2.2) for
each major virtualbox version which would do some preprocessor magic
and include the template file (vbox_tmpl.c) in it for the functionality
it offers.