Bug ID: 41198
           Summary: Parallel.h's use of of concrt / ppl is incorrect
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Support Libraries

Writes BillyONeil (

'''There's also an issue here that this code is using std::mutex with ConcRT
powered machinery like Concurrency::parallel_for_each, which is not supported
and is likely to result in deadlocks. ConcRT assumes that everything you give
to it is non-blocking, so you can't use Concurrency::parallel_for_each with
platform synchronization primitives. (This is the biggest reason we, MSVC++,
are moving away from ConcRT as a technoligy and did not use it to power our
parallel algorithms implementation)'''

We should probably move off concrt / ppl then.

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