cms-sw/cmssw — pull request #3756 by wmtan (2014-05-08 17:53:54+00:00)
Title: Use concurrent unordered map for thread safety

Our code for ROOT6 uses a static map as a cache. This pull request replaces the std::map with tbb::coucurrent_unordered_map for thread safety. The concurrent_unordered_map is not thread safe for deletions, but that is OK since we never delete anything from the map.