Fix errors detected on Windows dashboards (!179) · Merge requests · VTK / VTK · GitLab

Sujin Philip requested to merge sujin.philip/vtk:vtkAtomicInt-fix-dashboard-errors-2 into master May 06, 2015

Fixes the following errors/warnings

Fixes linker error by adding VTKCOMMONCORE_EXPORT to struct atomic type.
Fixes warning "'CriticalSectionGuard' : assignment operator could not be generated".