with thread safe local statics
and prefix statics

Change-Id: Iaa7c9056847f75612d6cf6c6e44d3896fca734de
Reviewed-on: https://gerrit.libreoffice.org/38433Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>