Commits on Feb 1, 2015

1. fix deadlock …

   Here is what's happening in some navigation tests I am switching to tf2.
   In buffer_core.cpp, line 1298, a callback is being called in
   testTransformableRequests after locking transformable_requests_mutex_
   line 1256. This is actually defined through a message_filter. It is a
   transformable that is being executed: it therefore locks
   messages_mutex_ line 449 in message_filter.h. At the same time, a
   message is added and the same mutex is locked line 308 in add but
   line 321, a transformable is also added to the list in buffer_core
   which calls a lock on transformable_requests_mutex_ line 1164 in
   addTransformableRequest. Hence a deadlock.

   

   vrabaud committed Feb 1, 2015
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