DenseVector/OpenMP/Morpheus_Reduction_Impl.hpp

 
#ifndef MORPHEUS_DENSEVECTOR_OPENMP_REDUCTION_IMPL_HPP
#define MORPHEUS_DENSEVECTOR_OPENMP_REDUCTION_IMPL_HPP
 
#if defined(MORPHEUS_ENABLE_OPENMP)
 
#include <Morpheus_SpaceTraits.hpp>
#include <Morpheus_FormatTraits.hpp>
#include <Morpheus_FormatTags.hpp>
#include <Morpheus_Spaces.hpp>
 
namespace Morpheus {
namespace Impl {
 
template <typename ExecSpace, typename Vector>
typename Vector::value_type reduce(
    const Vector& in, typename Vector::size_type size,
    typename std::enable_if_t<
        Morpheus::is_dense_vector_format_container_v<Vector> &&
        Morpheus::has_custom_backend_v<ExecSpace> &&
        Morpheus::has_openmp_execution_space_v<ExecSpace> &&
        Morpheus::has_access_v<ExecSpace, Vector>>* = nullptr) {
  using value_type = typename Vector::value_type;
  using size_type  = typename Vector::size_type;
 
  value_type sum = value_type(0);
 
#pragma omp parallel for reduction(+ : sum)
  for (size_type i = 0; i < size; i++) sum += in[i];
 
  return sum;
}
 
}  // namespace Impl
}  // namespace Morpheus
 
#endif  // MORPHEUS_ENABLE_OPENMP
 
#endif  // MORPHEUS_DENSEVECTOR_OPENMP_REDUCTION_IMPL_HPP