From Apache OpenOffice Wiki
- Solar Mutex
- The Mutex protecting VCL not to be entered by multiple threads concurrently. This Mutex needs to be acquired before invoking any VCL functionality. Access to the Mutex is provided by gsl/vcl/inc/svapp.hxx
class Application. This Mutex is currently also used to protect most of the code. The revision of OOos usage/support of multi-threading is going to remove the Solar Mutex.