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Kokkos_View.hpp
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Kokkos_View.hpp
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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
#ifndef KOKKOS_IMPL_PUBLIC_INCLUDE
#include <Kokkos_Macros.hpp>
static_assert(false,
"Including non-public Kokkos header files is not allowed.");
#endif
#ifndef KOKKOS_VIEW_HPP
#define KOKKOS_VIEW_HPP
#include <type_traits>
#include <string>
#include <algorithm>
#include <initializer_list>
#include <Kokkos_Core_fwd.hpp>
#include <Kokkos_HostSpace.hpp>
#include <Kokkos_MemoryTraits.hpp>
#include <Kokkos_ExecPolicy.hpp>
#include <View/Hooks/Kokkos_ViewHooks.hpp>
#include <impl/Kokkos_Tools.hpp>
#include <impl/Kokkos_Utilities.hpp>
#ifdef KOKKOS_ENABLE_IMPL_MDSPAN
#include <View/MDSpan/Kokkos_MDSpan_Extents.hpp>
#include <View/MDSpan/Kokkos_MDSpan_Layout.hpp>
#endif
#include <Kokkos_MinMax.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
template <class DataType>
struct ViewArrayAnalysis;
template <class DataType, class ArrayLayout,
typename ValueType =
typename ViewArrayAnalysis<DataType>::non_const_value_type>
struct ViewDataAnalysis;
template <class, class...>
class ViewMapping {
public:
enum : bool { is_assignable_data_type = false };
enum : bool { is_assignable = false };
};
template <typename IntType>
constexpr KOKKOS_INLINE_FUNCTION std::size_t count_valid_integers(
const IntType i0, const IntType i1, const IntType i2, const IntType i3,
const IntType i4, const IntType i5, const IntType i6, const IntType i7) {
static_assert(std::is_integral<IntType>::value,
"count_valid_integers() must have integer arguments.");
return (i0 != KOKKOS_INVALID_INDEX) + (i1 != KOKKOS_INVALID_INDEX) +
(i2 != KOKKOS_INVALID_INDEX) + (i3 != KOKKOS_INVALID_INDEX) +
(i4 != KOKKOS_INVALID_INDEX) + (i5 != KOKKOS_INVALID_INDEX) +
(i6 != KOKKOS_INVALID_INDEX) + (i7 != KOKKOS_INVALID_INDEX);
}
// FIXME Ideally, we would not instantiate this function for every possible View
// type. We should be able to only pass "extent" when we use mdspan.
template <typename View>
KOKKOS_INLINE_FUNCTION void runtime_check_rank(
const View&, const bool is_void_spec, const size_t i0, const size_t i1,
const size_t i2, const size_t i3, const size_t i4, const size_t i5,
const size_t i6, const size_t i7, const char* label) {
(void)(label);
if (is_void_spec) {
const size_t num_passed_args =
count_valid_integers(i0, i1, i2, i3, i4, i5, i6, i7);
// We either allow to pass as many extents as the dynamic rank is, or
// as many extents as the total rank is. In the latter case, the given
// extents for the static dimensions must match the
// compile-time extents.
constexpr int rank = View::rank();
constexpr int dyn_rank = View::rank_dynamic();
const bool n_args_is_dyn_rank = num_passed_args == dyn_rank;
const bool n_args_is_rank = num_passed_args == rank;
if constexpr (rank != dyn_rank) {
if (n_args_is_rank) {
size_t new_extents[8] = {i0, i1, i2, i3, i4, i5, i6, i7};
for (int i = dyn_rank; i < rank; ++i)
if (new_extents[i] != View::static_extent(i)) {
KOKKOS_IF_ON_HOST(
const std::string message =
"The specified run-time extent for Kokkos::View '" +
std::string(label) +
"' does not match the compile-time extent in dimension " +
std::to_string(i) + ". The given extent is " +
std::to_string(new_extents[i]) + " but should be " +
std::to_string(View::static_extent(i)) + ".\n";
Kokkos::abort(message.c_str());)
KOKKOS_IF_ON_DEVICE(
Kokkos::abort(
"The specified run-time extents for a Kokkos::View "
"do not match the compile-time extents.");)
}
}
}
if (!n_args_is_dyn_rank && !n_args_is_rank) {
KOKKOS_IF_ON_HOST(
const std::string message =
"Constructor for Kokkos::View '" + std::string(label) +
"' has mismatched number of arguments. The number "
"of arguments = " +
std::to_string(num_passed_args) +
" neither matches the dynamic rank = " +
std::to_string(dyn_rank) +
" nor the total rank = " + std::to_string(rank) + "\n";
Kokkos::abort(message.c_str());)
KOKKOS_IF_ON_DEVICE(Kokkos::abort("Constructor for Kokkos View has "
"mismatched number of arguments.");)
}
}
}
} /* namespace Impl */
} /* namespace Kokkos */
// Class to provide a uniform type
namespace Kokkos {
namespace Impl {
template <class ViewType, int Traits = 0>
struct ViewUniformType;
}
} // namespace Kokkos
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
/** \class ViewTraits
* \brief Traits class for accessing attributes of a View.
*
* This is an implementation detail of View. It is only of interest
* to developers implementing a new specialization of View.
*
* Template argument options:
* - View< DataType >
* - View< DataType , Space >
* - View< DataType , Space , MemoryTraits >
* - View< DataType , ArrayLayout >
* - View< DataType , ArrayLayout , Space >
* - View< DataType , ArrayLayout , MemoryTraits >
* - View< DataType , ArrayLayout , Space , MemoryTraits >
* - View< DataType , MemoryTraits >
*/
template <class DataType, class... Properties>
struct ViewTraits;
template <>
struct ViewTraits<void> {
using execution_space = void;
using memory_space = void;
using HostMirrorSpace = void;
using array_layout = void;
using memory_traits = void;
using specialize = void;
using hooks_policy = void;
};
template <class... Prop>
struct ViewTraits<void, void, Prop...> {
// Ignore an extraneous 'void'
using execution_space = typename ViewTraits<void, Prop...>::execution_space;
using memory_space = typename ViewTraits<void, Prop...>::memory_space;
using HostMirrorSpace = typename ViewTraits<void, Prop...>::HostMirrorSpace;
using array_layout = typename ViewTraits<void, Prop...>::array_layout;
using memory_traits = typename ViewTraits<void, Prop...>::memory_traits;
using specialize = typename ViewTraits<void, Prop...>::specialize;
using hooks_policy = typename ViewTraits<void, Prop...>::hooks_policy;
};
template <class HooksPolicy, class... Prop>
struct ViewTraits<
std::enable_if_t<Kokkos::Experimental::is_hooks_policy<HooksPolicy>::value>,
HooksPolicy, Prop...> {
using execution_space = typename ViewTraits<void, Prop...>::execution_space;
using memory_space = typename ViewTraits<void, Prop...>::memory_space;
using HostMirrorSpace = typename ViewTraits<void, Prop...>::HostMirrorSpace;
using array_layout = typename ViewTraits<void, Prop...>::array_layout;
using memory_traits = typename ViewTraits<void, Prop...>::memory_traits;
using specialize = typename ViewTraits<void, Prop...>::specialize;
using hooks_policy = HooksPolicy;
};
template <class ArrayLayout, class... Prop>
struct ViewTraits<std::enable_if_t<Kokkos::is_array_layout<ArrayLayout>::value>,
ArrayLayout, Prop...> {
// Specify layout, keep subsequent space and memory traits arguments
using execution_space = typename ViewTraits<void, Prop...>::execution_space;
using memory_space = typename ViewTraits<void, Prop...>::memory_space;
using HostMirrorSpace = typename ViewTraits<void, Prop...>::HostMirrorSpace;
using array_layout = ArrayLayout;
using memory_traits = typename ViewTraits<void, Prop...>::memory_traits;
using specialize = typename ViewTraits<void, Prop...>::specialize;
using hooks_policy = typename ViewTraits<void, Prop...>::hooks_policy;
};
template <class Space, class... Prop>
struct ViewTraits<std::enable_if_t<Kokkos::is_space<Space>::value>, Space,
Prop...> {
// Specify Space, memory traits should be the only subsequent argument.
static_assert(
std::is_same<typename ViewTraits<void, Prop...>::execution_space,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::memory_space,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::HostMirrorSpace,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::array_layout,
void>::value,
"Only one View Execution or Memory Space template argument");
using execution_space = typename Space::execution_space;
using memory_space = typename Space::memory_space;
using HostMirrorSpace =
typename Kokkos::Impl::HostMirror<Space>::Space::memory_space;
using array_layout = typename execution_space::array_layout;
using memory_traits = typename ViewTraits<void, Prop...>::memory_traits;
using specialize = typename ViewTraits<void, Prop...>::specialize;
using hooks_policy = typename ViewTraits<void, Prop...>::hooks_policy;
};
template <class MemoryTraits, class... Prop>
struct ViewTraits<
std::enable_if_t<Kokkos::is_memory_traits<MemoryTraits>::value>,
MemoryTraits, Prop...> {
// Specify memory trait, should not be any subsequent arguments
static_assert(
std::is_same<typename ViewTraits<void, Prop...>::execution_space,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::memory_space,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::array_layout,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::memory_traits,
void>::value &&
std::is_same<typename ViewTraits<void, Prop...>::hooks_policy,
void>::value,
"MemoryTrait is the final optional template argument for a View");
using execution_space = void;
using memory_space = void;
using HostMirrorSpace = void;
using array_layout = void;
using memory_traits = MemoryTraits;
using specialize = void;
using hooks_policy = void;
};
template <class DataType, class... Properties>
struct ViewTraits {
private:
// Unpack the properties arguments
using prop = ViewTraits<void, Properties...>;
using ExecutionSpace =
std::conditional_t<!std::is_void<typename prop::execution_space>::value,
typename prop::execution_space,
Kokkos::DefaultExecutionSpace>;
using MemorySpace =
std::conditional_t<!std::is_void<typename prop::memory_space>::value,
typename prop::memory_space,
typename ExecutionSpace::memory_space>;
using ArrayLayout =
std::conditional_t<!std::is_void<typename prop::array_layout>::value,
typename prop::array_layout,
typename ExecutionSpace::array_layout>;
using HostMirrorSpace = std::conditional_t<
!std::is_void<typename prop::HostMirrorSpace>::value,
typename prop::HostMirrorSpace,
typename Kokkos::Impl::HostMirror<ExecutionSpace>::Space>;
using MemoryTraits =
std::conditional_t<!std::is_void<typename prop::memory_traits>::value,
typename prop::memory_traits,
typename Kokkos::MemoryManaged>;
using HooksPolicy =
std::conditional_t<!std::is_void<typename prop::hooks_policy>::value,
typename prop::hooks_policy,
Kokkos::Experimental::DefaultViewHooks>;
// Analyze data type's properties,
// May be specialized based upon the layout and value type
using data_analysis = Kokkos::Impl::ViewDataAnalysis<DataType, ArrayLayout>;
public:
//------------------------------------
// Data type traits:
using data_type = typename data_analysis::type;
using const_data_type = typename data_analysis::const_type;
using non_const_data_type = typename data_analysis::non_const_type;
//------------------------------------
// Compatible array of trivial type traits:
using scalar_array_type = typename data_analysis::scalar_array_type;
using const_scalar_array_type =
typename data_analysis::const_scalar_array_type;
using non_const_scalar_array_type =
typename data_analysis::non_const_scalar_array_type;
//------------------------------------
// Value type traits:
using value_type = typename data_analysis::value_type;
using const_value_type = typename data_analysis::const_value_type;
using non_const_value_type = typename data_analysis::non_const_value_type;
//------------------------------------
// Mapping traits:
using array_layout = ArrayLayout;
using dimension = typename data_analysis::dimension;
using specialize = std::conditional_t<
std::is_void<typename data_analysis::specialize>::value,
typename prop::specialize,
typename data_analysis::specialize>; /* mapping specialization tag */
static constexpr unsigned rank = dimension::rank;
static constexpr unsigned rank_dynamic = dimension::rank_dynamic;
//------------------------------------
// Execution space, memory space, memory access traits, and host mirror space.
using execution_space = ExecutionSpace;
using memory_space = MemorySpace;
using device_type = Kokkos::Device<ExecutionSpace, MemorySpace>;
using memory_traits = MemoryTraits;
using host_mirror_space = HostMirrorSpace;
using hooks_policy = HooksPolicy;
using size_type = typename MemorySpace::size_type;
enum { is_hostspace = std::is_same<MemorySpace, HostSpace>::value };
enum { is_managed = MemoryTraits::is_unmanaged == 0 };
enum { is_random_access = MemoryTraits::is_random_access == 1 };
//------------------------------------
};
#ifdef KOKKOS_ENABLE_IMPL_MDSPAN
namespace Experimental::Impl {
struct UnsupportedKokkosArrayLayout;
template <class Traits, class Enabled = void>
struct MDSpanViewTraits {
using mdspan_type = UnsupportedKokkosArrayLayout;
};
/**
* "Natural" mdspan for a view if the View's ArrayLayout is supported.
*/
template <class Traits>
struct MDSpanViewTraits<
Traits, std::void_t<typename Experimental::Impl::LayoutFromArrayLayout<
typename Traits::array_layout>::type>> {
using index_type = typename Traits::execution_space::size_type;
using extents_type = typename Experimental::Impl::ExtentsFromDataType<
index_type, typename Traits::data_type>::type;
using mdspan_layout_type = typename Experimental::Impl::LayoutFromArrayLayout<
typename Traits::array_layout>::type;
using mdspan_type =
mdspan<typename Traits::value_type, extents_type, mdspan_layout_type>;
};
} // namespace Experimental::Impl
#endif // KOKKOS_ENABLE_IMPL_MDSPAN
/** \class View
* \brief View to an array of data.
*
* A View represents an array of one or more dimensions.
* For details, please refer to Kokkos' tutorial materials.
*
* \section Kokkos_View_TemplateParameters Template parameters
*
* This class has both required and optional template parameters. The
* \c DataType parameter must always be provided, and must always be
* first. The parameters \c Arg1Type, \c Arg2Type, and \c Arg3Type are
* placeholders for different template parameters. The default value
* of the fifth template parameter \c Specialize suffices for most use
* cases. When explaining the template parameters, we won't refer to
* \c Arg1Type, \c Arg2Type, and \c Arg3Type; instead, we will refer
* to the valid categories of template parameters, in whatever order
* they may occur.
*
* Valid ways in which template arguments may be specified:
* - View< DataType >
* - View< DataType , Layout >
* - View< DataType , Layout , Space >
* - View< DataType , Layout , Space , MemoryTraits >
* - View< DataType , Space >
* - View< DataType , Space , MemoryTraits >
* - View< DataType , MemoryTraits >
*
* \tparam DataType (required) This indicates both the type of each
* entry of the array, and the combination of compile-time and
* run-time array dimension(s). For example, <tt>double*</tt>
* indicates a one-dimensional array of \c double with run-time
* dimension, and <tt>int*[3]</tt> a two-dimensional array of \c int
* with run-time first dimension and compile-time second dimension
* (of 3). In general, the run-time dimensions (if any) must go
* first, followed by zero or more compile-time dimensions. For
* more examples, please refer to the tutorial materials.
*
* \tparam Space (required) The memory space.
*
* \tparam Layout (optional) The array's layout in memory. For
* example, LayoutLeft indicates a column-major (Fortran style)
* layout, and LayoutRight a row-major (C style) layout. If not
* specified, this defaults to the preferred layout for the
* <tt>Space</tt>.
*
* \tparam MemoryTraits (optional) Assertion of the user's intended
* access behavior. For example, RandomAccess indicates read-only
* access with limited spatial locality, and Unmanaged lets users
* wrap externally allocated memory in a View without automatic
* deallocation.
*
* \section Kokkos_View_MT MemoryTraits discussion
*
* \subsection Kokkos_View_MT_Interp MemoryTraits interpretation depends on
* Space
*
* Some \c MemoryTraits options may have different interpretations for
* different \c Space types. For example, with the Cuda device,
* \c RandomAccess tells Kokkos to fetch the data through the texture
* cache, whereas the non-GPU devices have no such hardware construct.
*
* \subsection Kokkos_View_MT_PrefUse Preferred use of MemoryTraits
*
* Users should defer applying the optional \c MemoryTraits parameter
* until the point at which they actually plan to rely on it in a
* computational kernel. This minimizes the number of template
* parameters exposed in their code, which reduces the cost of
* compilation. Users may always assign a View without specified
* \c MemoryTraits to a compatible View with that specification.
* For example:
* \code
* // Pass in the simplest types of View possible.
* void
* doSomething (View<double*, Cuda> out,
* View<const double*, Cuda> in)
* {
* // Assign the "generic" View in to a RandomAccess View in_rr.
* // Note that RandomAccess View objects must have const data.
* View<const double*, Cuda, RandomAccess> in_rr = in;
* // ... do something with in_rr and out ...
* }
* \endcode
*/
} // namespace Kokkos
namespace Kokkos {
template <class T1, class T2>
struct is_always_assignable_impl;
template <class... ViewTDst, class... ViewTSrc>
struct is_always_assignable_impl<Kokkos::View<ViewTDst...>,
Kokkos::View<ViewTSrc...>> {
using mapping_type = Kokkos::Impl::ViewMapping<
typename Kokkos::View<ViewTDst...>::traits,
typename Kokkos::View<ViewTSrc...>::traits,
typename Kokkos::View<ViewTDst...>::traits::specialize>;
constexpr static bool value =
mapping_type::is_assignable &&
static_cast<int>(Kokkos::View<ViewTDst...>::rank_dynamic) >=
static_cast<int>(Kokkos::View<ViewTSrc...>::rank_dynamic);
};
template <class View1, class View2>
using is_always_assignable = is_always_assignable_impl<
std::remove_reference_t<View1>,
std::remove_const_t<std::remove_reference_t<View2>>>;
template <class T1, class T2>
inline constexpr bool is_always_assignable_v =
is_always_assignable<T1, T2>::value;
template <class... ViewTDst, class... ViewTSrc>
constexpr bool is_assignable(const Kokkos::View<ViewTDst...>& dst,
const Kokkos::View<ViewTSrc...>& src) {
using DstTraits = typename Kokkos::View<ViewTDst...>::traits;
using SrcTraits = typename Kokkos::View<ViewTSrc...>::traits;
using mapping_type =
Kokkos::Impl::ViewMapping<DstTraits, SrcTraits,
typename DstTraits::specialize>;
return is_always_assignable_v<Kokkos::View<ViewTDst...>,
Kokkos::View<ViewTSrc...>> ||
(mapping_type::is_assignable &&
((DstTraits::dimension::rank_dynamic >= 1) ||
(dst.static_extent(0) == src.extent(0))) &&
((DstTraits::dimension::rank_dynamic >= 2) ||
(dst.static_extent(1) == src.extent(1))) &&
((DstTraits::dimension::rank_dynamic >= 3) ||
(dst.static_extent(2) == src.extent(2))) &&
((DstTraits::dimension::rank_dynamic >= 4) ||
(dst.static_extent(3) == src.extent(3))) &&
((DstTraits::dimension::rank_dynamic >= 5) ||
(dst.static_extent(4) == src.extent(4))) &&
((DstTraits::dimension::rank_dynamic >= 6) ||
(dst.static_extent(5) == src.extent(5))) &&
((DstTraits::dimension::rank_dynamic >= 7) ||
(dst.static_extent(6) == src.extent(6))) &&
((DstTraits::dimension::rank_dynamic >= 8) ||
(dst.static_extent(7) == src.extent(7))));
}
} /* namespace Kokkos */
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
#include <impl/Kokkos_ViewMapping.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
// FIXME_OPENMPTARGET - The `declare target` is needed for the Intel GPUs with
// the OpenMPTarget backend
#if defined(KOKKOS_ENABLE_OPENMPTARGET) && defined(KOKKOS_COMPILER_INTEL_LLVM)
#pragma omp declare target
#endif
inline constexpr Kokkos::ALL_t ALL{};
#if defined(KOKKOS_ENABLE_OPENMPTARGET) && defined(KOKKOS_COMPILER_INTEL_LLVM)
#pragma omp end declare target
#endif
inline constexpr Kokkos::Impl::WithoutInitializing_t WithoutInitializing{};
inline constexpr Kokkos::Impl::AllowPadding_t AllowPadding{};
/** \brief Create View allocation parameter bundle from argument list.
*
* Valid argument list members are:
* 1) label as a "string" or std::string
* 2) memory space instance of the View::memory_space type
* 3) execution space instance compatible with the View::memory_space
* 4) Kokkos::WithoutInitializing to bypass initialization
* 4) Kokkos::AllowPadding to allow allocation to pad dimensions for memory
* alignment
*/
template <class... Args>
inline Impl::ViewCtorProp<typename Impl::ViewCtorProp<void, Args>::type...>
view_alloc(Args const&... args) {
using return_type =
Impl::ViewCtorProp<typename Impl::ViewCtorProp<void, Args>::type...>;
static_assert(!return_type::has_pointer,
"Cannot give pointer-to-memory for view allocation");
return return_type(args...);
}
template <class... Args>
KOKKOS_INLINE_FUNCTION
Impl::ViewCtorProp<typename Impl::ViewCtorProp<void, Args>::type...>
view_wrap(Args const&... args) {
using return_type =
Impl::ViewCtorProp<typename Impl::ViewCtorProp<void, Args>::type...>;
static_assert(!return_type::has_memory_space &&
!return_type::has_execution_space &&
!return_type::has_label && return_type::has_pointer,
"Must only give pointer-to-memory for view wrapping");
return return_type(args...);
}
} /* namespace Kokkos */
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
template <class DataType, class... Properties>
class View;
template <class>
struct is_view : public std::false_type {};
template <class D, class... P>
struct is_view<View<D, P...>> : public std::true_type {};
template <class D, class... P>
struct is_view<const View<D, P...>> : public std::true_type {};
template <class T>
inline constexpr bool is_view_v = is_view<T>::value;
template <class DataType, class... Properties>
class View : public ViewTraits<DataType, Properties...> {
private:
template <class, class...>
friend class View;
template <class, class...>
friend class Kokkos::Impl::ViewMapping;
using view_tracker_type = Kokkos::Impl::ViewTracker<View>;
public:
using traits = ViewTraits<DataType, Properties...>;
private:
using map_type =
Kokkos::Impl::ViewMapping<traits, typename traits::specialize>;
template <typename V>
friend struct Kokkos::Impl::ViewTracker;
using hooks_policy = typename traits::hooks_policy;
view_tracker_type m_track;
map_type m_map;
public:
//----------------------------------------
/** \brief Compatible view of array of scalar types */
using array_type =
View<typename traits::scalar_array_type, typename traits::array_layout,
typename traits::device_type, typename traits::hooks_policy,
typename traits::memory_traits>;
/** \brief Compatible view of const data type */
using const_type =
View<typename traits::const_data_type, typename traits::array_layout,
typename traits::device_type, typename traits::hooks_policy,
typename traits::memory_traits>;
/** \brief Compatible view of non-const data type */
using non_const_type =
View<typename traits::non_const_data_type, typename traits::array_layout,
typename traits::device_type, typename traits::hooks_policy,
typename traits::memory_traits>;
/** \brief Compatible HostMirror view */
using HostMirror =
View<typename traits::non_const_data_type, typename traits::array_layout,
Device<DefaultHostExecutionSpace,
typename traits::host_mirror_space::memory_space>,
typename traits::hooks_policy>;
/** \brief Compatible HostMirror view */
using host_mirror_type =
View<typename traits::non_const_data_type, typename traits::array_layout,
typename traits::host_mirror_space, typename traits::hooks_policy>;
/** \brief Unified types */
using uniform_type = typename Impl::ViewUniformType<View, 0>::type;
using uniform_const_type =
typename Impl::ViewUniformType<View, 0>::const_type;
using uniform_runtime_type =
typename Impl::ViewUniformType<View, 0>::runtime_type;
using uniform_runtime_const_type =
typename Impl::ViewUniformType<View, 0>::runtime_const_type;
using uniform_nomemspace_type =
typename Impl::ViewUniformType<View, 0>::nomemspace_type;
using uniform_const_nomemspace_type =
typename Impl::ViewUniformType<View, 0>::const_nomemspace_type;
using uniform_runtime_nomemspace_type =
typename Impl::ViewUniformType<View, 0>::runtime_nomemspace_type;
using uniform_runtime_const_nomemspace_type =
typename Impl::ViewUniformType<View, 0>::runtime_const_nomemspace_type;
//----------------------------------------
// Domain rank and extents
static constexpr Impl::integral_constant<size_t, traits::dimension::rank>
rank = {};
static constexpr Impl::integral_constant<size_t,
traits::dimension::rank_dynamic>
rank_dynamic = {};
#ifdef KOKKOS_ENABLE_DEPRECATED_CODE_4
enum {Rank KOKKOS_DEPRECATED_WITH_COMMENT("Use rank instead.") =
map_type::Rank};
#endif
template <typename iType>
KOKKOS_INLINE_FUNCTION constexpr std::enable_if_t<
std::is_integral<iType>::value, size_t>
extent(const iType& r) const noexcept {
return m_map.extent(r);
}
static KOKKOS_INLINE_FUNCTION constexpr size_t static_extent(
const unsigned r) noexcept {
return map_type::static_extent(r);
}
template <typename iType>
KOKKOS_INLINE_FUNCTION constexpr std::enable_if_t<
std::is_integral<iType>::value, int>
extent_int(const iType& r) const noexcept {
return static_cast<int>(m_map.extent(r));
}
KOKKOS_INLINE_FUNCTION constexpr typename traits::array_layout layout()
const {
return m_map.layout();
}
//----------------------------------------
/* Deprecate all 'dimension' functions in favor of
* ISO/C++ vocabulary 'extent'.
*/
KOKKOS_INLINE_FUNCTION constexpr size_t size() const {
return m_map.dimension_0() * m_map.dimension_1() * m_map.dimension_2() *
m_map.dimension_3() * m_map.dimension_4() * m_map.dimension_5() *
m_map.dimension_6() * m_map.dimension_7();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_0() const {
return m_map.stride_0();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_1() const {
return m_map.stride_1();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_2() const {
return m_map.stride_2();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_3() const {
return m_map.stride_3();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_4() const {
return m_map.stride_4();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_5() const {
return m_map.stride_5();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_6() const {
return m_map.stride_6();
}
KOKKOS_INLINE_FUNCTION constexpr size_t stride_7() const {
return m_map.stride_7();
}
template <typename iType>
KOKKOS_INLINE_FUNCTION constexpr std::enable_if_t<
std::is_integral<iType>::value, size_t>
stride(iType r) const {
return (
r == 0
? m_map.stride_0()
: (r == 1
? m_map.stride_1()
: (r == 2
? m_map.stride_2()
: (r == 3
? m_map.stride_3()
: (r == 4
? m_map.stride_4()
: (r == 5
? m_map.stride_5()
: (r == 6
? m_map.stride_6()
: m_map.stride_7())))))));
}
template <typename iType>
KOKKOS_INLINE_FUNCTION void stride(iType* const s) const {
m_map.stride(s);
}
//----------------------------------------
// Range span is the span which contains all members.
using reference_type = typename map_type::reference_type;
using pointer_type = typename map_type::pointer_type;
enum {
reference_type_is_lvalue_reference =
std::is_lvalue_reference<reference_type>::value
};
KOKKOS_INLINE_FUNCTION constexpr size_t span() const { return m_map.span(); }
KOKKOS_INLINE_FUNCTION bool span_is_contiguous() const {
return m_map.span_is_contiguous();
}
KOKKOS_INLINE_FUNCTION constexpr bool is_allocated() const {
return m_map.data() != nullptr;
}
KOKKOS_INLINE_FUNCTION constexpr pointer_type data() const {
return m_map.data();
}
//----------------------------------------
// Allow specializations to query their specialized map
KOKKOS_INLINE_FUNCTION
const Kokkos::Impl::ViewMapping<traits, typename traits::specialize>&
impl_map() const {
return m_map;
}
KOKKOS_INLINE_FUNCTION
const Kokkos::Impl::SharedAllocationTracker& impl_track() const {
return m_track.m_tracker;
}
//----------------------------------------
private:
static constexpr bool is_layout_left =
std::is_same<typename traits::array_layout, Kokkos::LayoutLeft>::value;
static constexpr bool is_layout_right =
std::is_same<typename traits::array_layout, Kokkos::LayoutRight>::value;
static constexpr bool is_layout_stride =
std::is_same<typename traits::array_layout, Kokkos::LayoutStride>::value;
static constexpr bool is_default_map =
std::is_void<typename traits::specialize>::value &&
(is_layout_left || is_layout_right || is_layout_stride);
#if defined(KOKKOS_ENABLE_DEBUG_BOUNDS_CHECK)
#define KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(...) \
Kokkos::Impl::runtime_check_memory_access_violation< \
typename traits::memory_space>( \
"Kokkos::View ERROR: attempt to access inaccessible memory space", \
__VA_ARGS__); \
Kokkos::Impl::view_verify_operator_bounds<typename traits::memory_space>( \
__VA_ARGS__);
#else
#define KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(...) \
Kokkos::Impl::runtime_check_memory_access_violation< \
typename traits::memory_space>( \
"Kokkos::View ERROR: attempt to access inaccessible memory space", \
__VA_ARGS__);
#endif
template <typename... Is>
static KOKKOS_FUNCTION void check_access_member_function_valid_args(Is...) {
static_assert(rank <= sizeof...(Is));
static_assert(sizeof...(Is) <= 8);
static_assert(Kokkos::Impl::are_integral<Is...>::value);
}
template <typename... Is>
static KOKKOS_FUNCTION void check_operator_parens_valid_args(Is...) {
static_assert(rank == sizeof...(Is));
static_assert(Kokkos::Impl::are_integral<Is...>::value);
}
public:
//------------------------------
// Rank 1 default map operator()
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::always_true<I0>::value && //
(1 == rank) && is_default_map && !is_layout_stride),
reference_type>
operator()(I0 i0) const {
check_operator_parens_valid_args(i0);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0)
return m_map.m_impl_handle[i0];
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::always_true<I0>::value && //
(1 == rank) && is_default_map && is_layout_stride),
reference_type>
operator()(I0 i0) const {
check_operator_parens_valid_args(i0);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0)
return m_map.m_impl_handle[m_map.m_impl_offset.m_stride.S0 * i0];
}
//------------------------------
// Rank 1 operator[]
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
((1 == rank) && Kokkos::Impl::are_integral<I0>::value && !is_default_map),
reference_type>
operator[](I0 i0) const {
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0)
return m_map.reference(i0);
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<((1 == rank) && Kokkos::Impl::are_integral<I0>::value &&
is_default_map && !is_layout_stride),
reference_type>
operator[](I0 i0) const {
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0)
return m_map.m_impl_handle[i0];
}
template <typename I0>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<((1 == rank) && Kokkos::Impl::are_integral<I0>::value &&
is_default_map && is_layout_stride),
reference_type>
operator[](I0 i0) const {
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0)
return m_map.m_impl_handle[m_map.m_impl_offset.m_stride.S0 * i0];
}
//------------------------------
// Rank 2 default map operator()
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::always_true<I0, I1>::value && //
(2 == rank) && is_default_map && is_layout_left && (rank_dynamic == 0)),
reference_type>
operator()(I0 i0, I1 i1) const {
check_operator_parens_valid_args(i0, i1);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0, i1)
return m_map.m_impl_handle[i0 + m_map.m_impl_offset.m_dim.N0 * i1];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::always_true<I0, I1>::value && //
(2 == rank) && is_default_map && is_layout_left && (rank_dynamic != 0)),
reference_type>
operator()(I0 i0, I1 i1) const {
check_operator_parens_valid_args(i0, i1);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0, i1)
return m_map.m_impl_handle[i0 + m_map.m_impl_offset.m_stride * i1];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::always_true<I0, I1>::value && //
(2 == rank) && is_default_map && is_layout_right && (rank_dynamic == 0)),
reference_type>
operator()(I0 i0, I1 i1) const {
check_operator_parens_valid_args(i0, i1);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0, i1)
return m_map.m_impl_handle[i1 + m_map.m_impl_offset.m_dim.N1 * i0];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION std::enable_if_t<
(Kokkos::Impl::always_true<I0, I1>::value && //
(2 == rank) && is_default_map && is_layout_right && (rank_dynamic != 0)),
reference_type>
operator()(I0 i0, I1 i1) const {
check_operator_parens_valid_args(i0, i1);
KOKKOS_IMPL_VIEW_OPERATOR_VERIFY(m_track, m_map, i0, i1)
return m_map.m_impl_handle[i1 + m_map.m_impl_offset.m_stride * i0];
}
template <typename I0, typename I1>
KOKKOS_FORCEINLINE_FUNCTION
std::enable_if_t<(Kokkos::Impl::always_true<I0, I1>::value && //
(2 == rank) && is_default_map && is_layout_stride),
reference_type>
operator()(I0 i0, I1 i1) const {
check_operator_parens_valid_args(i0, i1);