Scalar views don't work with Kokkos::Atomic memory trait

[crtrott]

The following code doesn't work:

#include <cstdio>

#include <Kokkos_Core.hpp>

int main(int argc, char* argv[]) {

  Kokkos::initialize();

  typedef Kokkos::View<unsigned int, Kokkos::OpenMP,
                       Kokkos::MemoryTraits<Kokkos::Atomic> > AtomicScalar;

  AtomicScalar atomicScalar("atomicScalar");

  const unsigned int numberOfTasks = 1000;
  Kokkos::parallel_for(Kokkos::RangePolicy<Kokkos::OpenMP>(0, numberOfTasks),
                       KOKKOS_LAMBDA (const unsigned int i) {
                         ++atomicScalar();
                       });

  const unsigned int value = atomicScalar();

  printf("scalar is %u, should be %u\n", value, numberOfTasks);

  Kokkos::finalize();
  return 0;
}

It does work when replacing atomicScalar with a 1D view of length 1.

[crtrott]

Pushed to master.