ExpressiveProgrammingForGraphicsProcessingUnits (EPGPU) is a CeePlusPlus library for embedding parallel OpenCl code inside a C++ program.

See http://www.cs.uaf.edu/sw/EPGPU/

The author is Orion Lawlor who has also written CudaMpi.
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About the challenges:
* ''Modern hardware systems present enormous parallelism—at the instruction level (superscalar), vector level (SIMD), thread level (SMT), core level (SMP), and across the network—yet modern software such as C++ or C# is primarily serial.'' 
* ''Building usable abstractions for parallel software has been identified as a key challenge for 21st century computer science.'' 
* ''.. embedding provides shared data structures, typesafe kernel invocation, and the ability to more naturally interleave CPU and GPU functions''
About Embedding in C++:
* ''Because OpenCL is implemented as a library, not a compiler, it is more difficult to provide a variety of basic features. But C++ provides an extremely rich set of tools for building domain-specific languages embedded inside C++, including powerful preprocessor macros, and partial specialization of user-defined templates.''
** Above Quotes from the following 8 page document: 
*** http://www.cs.uaf.edu/sw/EPGPU/epgpu_2011_lawlor.pdf
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CategoryCpp ParallelProgrammingModel CategoryGpgpu