Intel Threading Building Blocks

Parallel Iteration

The types const_range_type and range_type model the Range Concept and provide the methods in Table 5-2 to access the bounds of the range. The types differ only in that the bounds for a const_range_type are of type const_iterator, whereas the bounds for a range_type are of type iterator.

Use the range types in conjunction with parallel_for, parallel_reduce, and parallel_scan to iterate over pairs in a concurrent_vector.

Table 5-2. Concept for concurrent_vector range R

Pseudosignature	Semantics
R::iterator R::begin() const	First item in range
R::iterator R::end() const	One past last item in range

range_type range( size_t grainsize )

Returns: range over an entire concurrent_vector that permits read-write access.

const_range_type range( size_t grainsize ) const

Returns: range over an entire concurrent_vector that permits read-only access.