---- Optimization: use a shared reference counter instead of a per-object counter in Object::Ref/Unref user: Mathieu Lacage <mathieu.lacage at sophia.inria.fr> files: src/core/object-ref-count.h src/core/object.cc src/core/object.h src/core/wscript url: http://code.nsnam.org/ns-3-dev/rev/9bf34ba759a3