[Libmesh-devel] Is SparsityPattern::Build::operator() thread-safe?

[Roy S. <roy...@ic...>]

It's getting called from a TBB algorithm, but I don't see what
prevents us from getting unlucky, trying to modify the same
SparsityPattern::Row from two threads at once (working on two
different elements which share the same node), and trashing memory as
non-thread-safe STL operations conflict with each other.
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Roy