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#2240: DataHandler for Rabenseifner allreduce that provides common AP…
…I for various data types
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| /* | ||
| //@HEADER | ||
| // ***************************************************************************** | ||
| // | ||
| // data_handler.h | ||
| // DARMA/vt => Virtual Transport | ||
| // | ||
| // Copyright 2019-2021 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. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are met: | ||
| // | ||
| // * Redistributions of source code must retain the above copyright notice, | ||
| // this list of conditions and the following disclaimer. | ||
| // | ||
| // * Redistributions in binary form must reproduce the above copyright notice, | ||
| // this list of conditions and the following disclaimer in the documentation | ||
| // and/or other materials provided with the distribution. | ||
| // | ||
| // * Neither the name of the copyright holder nor the names of its | ||
| // contributors may be used to endorse or promote products derived from this | ||
| // software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
| // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| // POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Questions? Contact [email protected] | ||
| // | ||
| // ***************************************************************************** | ||
| //@HEADER | ||
| */ | ||
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| #if !defined INCLUDED_VT_COLLECTIVE_REDUCE_ALLREDUCE_DATA_HANDLER_H | ||
| #define INCLUDED_VT_COLLECTIVE_REDUCE_ALLREDUCE_DATA_HANDLER_H | ||
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| #include <vector> | ||
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| #ifdef VT_KOKKOS_ENABLED | ||
| #include <Kokkos_Core.hpp> | ||
| #endif | ||
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| template <typename Container> | ||
| class DataHandler { | ||
| public: | ||
| using Scalar = float; | ||
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| static size_t size(const Container& data); | ||
| static Scalar& at(Container& data, size_t idx); | ||
| static void set(Container& data, size_t idx, const Scalar& value); | ||
| static Container split(Container& data, size_t start, size_t end); | ||
| }; | ||
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| template <typename T> | ||
| class DataHandler<std::vector<T>> { | ||
| public: | ||
| using Scalar = T; | ||
| static size_t size(const std::vector<T>& data) { return data.size(); } | ||
| static T at(const std::vector<T>& data, size_t idx) { return data[idx]; } | ||
| static T& at(std::vector<T>& data, size_t idx) { return data[idx]; } | ||
| static void set(std::vector<T>& data, size_t idx, const T& value) { | ||
| data[idx] = value; | ||
| } | ||
| static std::vector<T> split(std::vector<T>& data, size_t start, size_t end) { | ||
| return std::vector<T>{data.begin() + start, data.begin() + end}; | ||
| } | ||
| }; | ||
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| #ifdef VT_KOKKOS_ENABLED | ||
| template <typename T, typename... Props> | ||
| class DataHandler<Kokkos::View<T*, Props...>> { | ||
| public: | ||
| static size_t size(const Kokkos::View<T*, Props...>& data) { | ||
| return data.extent(0); | ||
| } | ||
| static T at(const Kokkos::View<T*, Props...>& data, size_t idx) { | ||
| return data(idx); | ||
| } | ||
| static T& at(Kokkos::View<T*, Props...>& data, size_t idx) { | ||
| return data(idx); | ||
| } | ||
| static void | ||
| set(Kokkos::View<T*, Props...>& data, size_t idx, const T& value) { | ||
| data(idx) = value; | ||
| } | ||
| }; | ||
| #endif // VT_KOKKOS_ENABLED | ||
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| #endif /*INCLUDED_VT_COLLECTIVE_REDUCE_ALLREDUCE_DATA_HANDLER_H*/ |
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