vtkObjectBase: add compilation option to avoid atomic ReferenceCount
ReferenceCount member of
vtkObjectCase is always
std::atomic<int32_t>. In pure
ReferenceCount can be directly declared as
int32_t avoiding additional computational cost related to atomic additions, memory fences, compilator (de)optimsations, etc. Of course this must be an
opt-in CMake option that should be
OFF by default.
If the option is activated, the CMake option
VTK_SMP_IMPLEMENTATION_TYPE should be
SEQUENTIAL. If not, a compilation configuration error should be output.
Would you be willing to review a MR regarding this issue?