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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#include <gtest/gtest.h>
#include <Kokkos_Core.hpp>
#include <sstream>
#include <iostream>
namespace Test {
template <class Space>
struct NestedView {
Kokkos::View<int *, Space> member;
public:
KOKKOS_INLINE_FUNCTION
NestedView() : member() {}
KOKKOS_INLINE_FUNCTION
NestedView &operator=(const Kokkos::View<int *, Space> &lhs) {
member = lhs;
if (member.extent(0)) Kokkos::atomic_add(&member(0), 1);
return *this;
}
KOKKOS_INLINE_FUNCTION
~NestedView() {
if (member.extent(0)) {
Kokkos::atomic_add(&member(0), -1);
}
}
};
template <class Space>
struct NestedViewFunctor {
Kokkos::View<NestedView<Space> *, Space> nested;
Kokkos::View<int *, Space> array;
NestedViewFunctor(const Kokkos::View<NestedView<Space> *, Space> &arg_nested,
const Kokkos::View<int *, Space> &arg_array)
: nested(arg_nested), array(arg_array) {}
KOKKOS_INLINE_FUNCTION
void operator()(int i) const { nested[i] = array; }
};
template <class Space>
void view_nested_view() {
Kokkos::View<int *, Space> tracking("tracking", 1);
typename Kokkos::View<int *, Space>::HostMirror host_tracking =
Kokkos::create_mirror(tracking);
{
Kokkos::View<NestedView<Space> *, Space> a("a_nested_view", 2);
Kokkos::parallel_for(Kokkos::RangePolicy<Space>(0, 2),
NestedViewFunctor<Space>(a, tracking));
Kokkos::deep_copy(host_tracking, tracking);
ASSERT_EQ(2, host_tracking(0));
Kokkos::View<NestedView<Space> *, Space> b("b_nested_view", 2);
Kokkos::parallel_for(Kokkos::RangePolicy<Space>(0, 2),
NestedViewFunctor<Space>(b, tracking));
Kokkos::deep_copy(host_tracking, tracking);
ASSERT_EQ(4, host_tracking(0));
}
Kokkos::deep_copy(host_tracking, tracking);
ASSERT_EQ(0, host_tracking(0));
}
TEST(TEST_CATEGORY, view_nested_view) { view_nested_view<TEST_EXECSPACE>(); }
} // namespace Test
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