cms-sw/cmssw — pull request #3721 by Dr15Jones (2014-05-07 15:32:51+00:00)
Title: Make TrajectorySmoothers const thread-safe

Most of the TrajectorySmoothers were changing the direction of their
Propagators in a const function. That is not thread safe. To fix the
problem the TrajectorySmoothers now hold two Propagators which only
differ based on their propagation direction.