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Object-Oriented Approaches

• Need to distinguish object-based interfaces to parallel subroutines from parallel object-oriented languages
• Object-based interfaces encapsulate information about an object, including data distribution

  
         call matrix_mult (a, b, c)

• Object-based interfaces can be implemented in C or Fortran 90.
• OO frameworks, such as the Parallel Object-Oriented Environment and Toolkit (POET), are similar in use to the X11 toolkit. The basic problem structure and communication linkages for scientific problem classes are captured.
• OO class libraries. P++ is OO class library for distributed arrays of doubles, floats, and integers. Standard arithmetic and relational operators are overloaded.
• Mentat provides a parallel object-oriented language based on C++ and a run-time system that supports a graph-based, data-driven model of computation.