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#ifndef HeterogeneousCore_AlpakaInterface_interface_memory_h
#define HeterogeneousCore_AlpakaInterface_interface_memory_h
#include <type_traits>
#include <alpaka/alpaka.hpp>
#include "HeterogeneousCore/AlpakaInterface/interface/AllocatorPolicy.h"
#include "HeterogeneousCore/AlpakaInterface/interface/CachedBufAlloc.h"
#include "HeterogeneousCore/AlpakaInterface/interface/config.h"
#include "HeterogeneousCore/AlpakaInterface/interface/devices.h"
#include "HeterogeneousCore/AlpakaInterface/interface/traits.h"
namespace cms::alpakatools {
// for Extent, Dim1D, Idx
using namespace alpaka_common;
// type deduction helpers
namespace detail {
template <typename TDev, typename T, typename = std::enable_if_t<alpaka::isDevice<TDev>>>
struct buffer_type {
using type = alpaka::Buf<TDev, T, Dim0D, Idx>;
};
template <typename TDev, typename T>
struct buffer_type<TDev, T[]> {
using type = alpaka::Buf<TDev, T, Dim1D, Idx>;
};
template <typename TDev, typename T, int N>
struct buffer_type<TDev, T[N]> {
using type = alpaka::Buf<TDev, T, Dim1D, Idx>;
};
template <typename TDev, typename T, typename = std::enable_if_t<alpaka::isDevice<TDev>>>
struct view_type {
using type = alpaka::ViewPlainPtr<TDev, T, Dim0D, Idx>;
};
template <typename TDev, typename T>
struct view_type<TDev, T[]> {
using type = alpaka::ViewPlainPtr<TDev, T, Dim1D, Idx>;
};
template <typename TDev, typename T, int N>
struct view_type<TDev, T[N]> {
using type = alpaka::ViewPlainPtr<TDev, T, Dim1D, Idx>;
};
} // namespace detail
// scalar and 1-dimensional host buffers
template <typename T>
using host_buffer = typename detail::buffer_type<DevHost, T>::type;
template <typename T>
using const_host_buffer = alpaka::ViewConst<host_buffer<T>>;
// non-cached, non-pinned, scalar and 1-dimensional host buffers
template <typename T>
std::enable_if_t<not std::is_array_v<T>, host_buffer<T>> make_host_buffer() {
return alpaka::allocBuf<T, Idx>(host(), Scalar{});
}
template <typename T>
std::enable_if_t<cms::is_unbounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_buffer<T>>
make_host_buffer(Extent extent) {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(host(), Vec1D{extent});
}
template <typename T>
std::enable_if_t<cms::is_bounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_buffer<T>>
make_host_buffer() {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(host(), Vec1D{std::extent_v<T>});
}
// non-cached, pinned, scalar and 1-dimensional host buffers
// the memory is pinned according to the device associated to the platform
template <typename T, typename TPlatform>
std::enable_if_t<not std::is_array_v<T>, host_buffer<T>> make_host_buffer() {
using Platform = TPlatform;
return alpaka::allocMappedBuf<T, Idx>(host(), platform<Platform>(), Scalar{});
}
template <typename T, typename TPlatform>
std::enable_if_t<cms::is_unbounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_buffer<T>>
make_host_buffer(Extent extent) {
using Platform = TPlatform;
return alpaka::allocMappedBuf<std::remove_extent_t<T>, Idx>(host(), platform<Platform>(), Vec1D{extent});
}
template <typename T, typename TPlatform>
std::enable_if_t<cms::is_bounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_buffer<T>>
make_host_buffer() {
using Platform = TPlatform;
return alpaka::allocMappedBuf<std::remove_extent_t<T>, Idx>(host(), platform<Platform>(), Vec1D{std::extent_v<T>});
}
// potentially cached, pinned, scalar and 1-dimensional host buffers, associated to a work queue
// the memory is pinned according to the device associated to the queue
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and not std::is_array_v<T>, host_buffer<T>> make_host_buffer(
TQueue const& queue) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<T, Idx>(host(), queue, Scalar{});
} else {
using Platform = alpaka::Platform<alpaka::Dev<TQueue>>;
return alpaka::allocMappedBuf<T, Idx>(host(), platform<Platform>(), Scalar{});
}
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_unbounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
host_buffer<T>>
make_host_buffer(TQueue const& queue, Extent extent) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<std::remove_extent_t<T>, Idx>(host(), queue, Vec1D{extent});
} else {
using Platform = alpaka::Platform<alpaka::Dev<TQueue>>;
return alpaka::allocMappedBuf<std::remove_extent_t<T>, Idx>(host(), platform<Platform>(), Vec1D{extent});
}
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_bounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
host_buffer<T>>
make_host_buffer(TQueue const& queue) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<std::remove_extent_t<T>, Idx>(host(), queue, Vec1D{std::extent_v<T>});
} else {
using Platform = alpaka::Platform<alpaka::Dev<TQueue>>;
return alpaka::allocMappedBuf<std::remove_extent_t<T>, Idx>(
host(), platform<Platform>(), Vec1D{std::extent_v<T>});
}
}
// scalar and 1-dimensional host views
template <typename T>
using host_view = typename detail::view_type<DevHost, T>::type;
template <typename T>
std::enable_if_t<not std::is_array_v<T>, host_view<T>> make_host_view(T& data) {
return alpaka::ViewPlainPtr<DevHost, T, Dim0D, Idx>(&data, host(), Scalar{});
}
template <typename T>
host_view<T[]> make_host_view(T* data, Extent extent) {
return alpaka::ViewPlainPtr<DevHost, T, Dim1D, Idx>(data, host(), Vec1D{extent});
}
template <typename T>
std::enable_if_t<cms::is_unbounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_view<T>>
make_host_view(T& data, Extent extent) {
return alpaka::ViewPlainPtr<DevHost, std::remove_extent_t<T>, Dim1D, Idx>(data, host(), Vec1D{extent});
}
template <typename T>
std::enable_if_t<cms::is_bounded_array_v<T> and not std::is_array_v<std::remove_extent_t<T>>, host_view<T>>
make_host_view(T& data) {
return alpaka::ViewPlainPtr<DevHost, std::remove_extent_t<T>, Dim1D, Idx>(data, host(), Vec1D{std::extent_v<T>});
}
// scalar and 1-dimensional device buffers
template <typename TDev, typename T, typename = std::enable_if_t<alpaka::isDevice<TDev>>>
using device_buffer = typename detail::buffer_type<TDev, T>::type;
template <typename TDev, typename T, typename = std::enable_if_t<alpaka::isDevice<TDev>>>
using const_device_buffer = alpaka::ViewConst<device_buffer<TDev, T>>;
// non-cached, scalar and 1-dimensional device buffers
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and not std::is_array_v<T>, device_buffer<TDev, T>> make_device_buffer(
TDev const& device) {
return alpaka::allocBuf<T, Idx>(device, Scalar{});
}
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and cms::is_unbounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_buffer<TDev, T>>
make_device_buffer(TDev const& device, Extent extent) {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(device, Vec1D{extent});
}
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and cms::is_bounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_buffer<TDev, T>>
make_device_buffer(TDev const& device) {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(device, Vec1D{std::extent_v<T>});
}
// potentially-cached, scalar and 1-dimensional device buffers with queue-ordered semantic
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and not std::is_array_v<T>, device_buffer<alpaka::Dev<TQueue>, T>>
make_device_buffer(TQueue const& queue) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<T, Idx>(alpaka::getDev(queue), queue, Scalar{});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Asynchronous) {
return alpaka::allocAsyncBuf<T, Idx>(queue, Scalar{});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Synchronous) {
return alpaka::allocBuf<T, Idx>(alpaka::getDev(queue), Scalar{});
}
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_unbounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_buffer<alpaka::Dev<TQueue>, T>>
make_device_buffer(TQueue const& queue, Extent extent) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<std::remove_extent_t<T>, Idx>(alpaka::getDev(queue), queue, Vec1D{extent});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Asynchronous) {
return alpaka::allocAsyncBuf<std::remove_extent_t<T>, Idx>(queue, Vec1D{extent});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Synchronous) {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(alpaka::getDev(queue), Vec1D{extent});
}
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_bounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_buffer<alpaka::Dev<TQueue>, T>>
make_device_buffer(TQueue const& queue) {
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Caching) {
return allocCachedBuf<std::remove_extent_t<T>, Idx>(alpaka::getDev(queue), queue, Vec1D{std::extent_v<T>});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Asynchronous) {
return alpaka::allocAsyncBuf<std::remove_extent_t<T>, Idx>(queue, Vec1D{std::extent_v<T>});
}
if constexpr (allocator_policy<alpaka::Dev<TQueue>> == AllocatorPolicy::Synchronous) {
return alpaka::allocBuf<std::remove_extent_t<T>, Idx>(alpaka::getDev(queue), Vec1D{std::extent_v<T>});
}
}
// scalar and 1-dimensional device views
template <typename TDev, typename T, typename = std::enable_if_t<alpaka::isDevice<TDev>>>
using device_view = typename detail::view_type<TDev, T>::type;
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and not std::is_array_v<T>, device_view<TDev, T>> make_device_view(
TDev const& device, T& data) {
return alpaka::ViewPlainPtr<TDev, T, Dim0D, Idx>(&data, device, Scalar{});
}
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev>, device_view<TDev, T[]>> make_device_view(TDev const& device,
T* data,
Extent extent) {
return alpaka::ViewPlainPtr<TDev, T, Dim1D, Idx>(data, device, Vec1D{extent});
}
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and cms::is_unbounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_view<TDev, T>>
make_device_view(TDev const& device, T& data, Extent extent) {
return alpaka::ViewPlainPtr<TDev, std::remove_extent_t<T>, Dim1D, Idx>(data, device, Vec1D{extent});
}
template <typename T, typename TDev>
std::enable_if_t<alpaka::isDevice<TDev> and cms::is_bounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_view<TDev, T>>
make_device_view(TDev const& device, T& data) {
return alpaka::ViewPlainPtr<TDev, std::remove_extent_t<T>, Dim1D, Idx>(data, device, Vec1D{std::extent_v<T>});
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and not std::is_array_v<T>, device_view<alpaka::Dev<TQueue>, T>>
make_device_view(TQueue const& queue, T& data) {
return alpaka::ViewPlainPtr<alpaka::Dev<TQueue>, T, Dim0D, Idx>(&data, alpaka::getDev(queue), Scalar{});
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue>, device_view<alpaka::Dev<TQueue>, T[]>> make_device_view(TQueue const& queue,
T* data,
Extent extent) {
return alpaka::ViewPlainPtr<alpaka::Dev<TQueue>, T, Dim1D, Idx>(data, alpaka::getDev(queue), Vec1D{extent});
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_unbounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_view<alpaka::Dev<TQueue>, T>>
make_device_view(TQueue const& queue, T& data, Extent extent) {
return alpaka::ViewPlainPtr<alpaka::Dev<TQueue>, std::remove_extent_t<T>, Dim1D, Idx>(
data, alpaka::getDev(queue), Vec1D{extent});
}
template <typename T, typename TQueue>
std::enable_if_t<alpaka::isQueue<TQueue> and cms::is_bounded_array_v<T> and
not std::is_array_v<std::remove_extent_t<T>>,
device_view<alpaka::Dev<TQueue>, T>>
make_device_view(TQueue const& queue, T& data) {
return alpaka::ViewPlainPtr<alpaka::Dev<TQueue>, std::remove_extent_t<T>, Dim1D, Idx>(
data, alpaka::getDev(queue), Vec1D{std::extent_v<T>});
}
} // namespace cms::alpakatools
#endif // HeterogeneousCore_AlpakaInterface_interface_memory_h
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