Type-specific Reduction

In a data parallel operation involving N threads of a rope, the threads can participate in a type-specific reduction. As discussed above each rope object has the skeleton of a tree-based reduction operation. The threads in a rope can enter type-specific reductions by cloning this reduction skeleton to a reduction object for that type. To achieve this Coir<Futures> defines a ReductionT template class parameterized on the type of the value the threads contribute to a reduction operation. This class is defined as follows :

 template <class T, class ReducerType

				 = binary_function<T,T, T> >

		class ReductionT

		{

		public:

				typedef  ReducerType reducer_type;

				typedef T data_type;

				ReductionT(Reduction& my_red

						= Rope::SelfRope().ReductionObj());

				ReductionT();

				// reduction operator

				T operator()(reducer_type reducer,

						const T& data);

		};