[libvirt] [PATCH 0/4] vbox: address thread-safety issues.

This patch series solves (at least in my testing) vbox driver thread-safety issues that were also outlined on libvirt-users ML [1] and I was affected with. Those patches try to follow the suggestions made Matthias' [2] in that thread as close as possible. Here's where my patch differs from that suggesions: * vboxGlobalData - still needs to keep reference to ISession and IVirutalBox session because it's apparently not possible to have multiple instances created/destroyed safely with pfnComInitialize and pfnComUninitalize calls on per-connection basis. * as such vboxPrivate (the new struct introduced here) also has references to ISession and IVirutalBox (which are just referenes to the ones from the global) mainly to immitate ISession instance per-connection. Apparently newer VBOX SDKs introduced pfnClinetInitialize that can allegedly create multiple ISessions and we might want to take advantage of that in the future hopefully without making additional changes allover the driver code that this patch did. The gist of the change is in patch 3 and it also contains more in-depth explanation on how the issue is being resolved. Also, please note that patch 4 should be squashed into 3 as it was kept separate only for code-review purposes and 3rd patch won't compile without 4 applied on top. [1] https://www.redhat.com/archives/libvirt-users/2012-April/msg00122.html [2] https://www.redhat.com/archives/libvirt-users/2012-April/msg00125.htmlgq Dawid Zamirski (4): vbox: add vboxPrivate struct. vbox: replace vboxGlobalData with vboxPrivate. vbox: change API (un)initialization logic. vbox: update rest of the code to for prior changes. src/vbox/vbox_common.c | 275 ++++++++++++--------------- src/vbox/vbox_common.h | 32 ++-- src/vbox/vbox_network.c | 51 +++-- src/vbox/vbox_storage.c | 20 +- src/vbox/vbox_tmpl.c | 433 +++++++++++++++++++++--------------------- src/vbox/vbox_uniformed_api.h | 128 +++++++------ 6 files changed, 460 insertions(+), 479 deletions(-) -- 2.7.4