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fix shared allocation by using a unique ID
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| /** | ||
| * \file | ||
| * Copyright 2015 Benjamin Worpitz | ||
| * | ||
| * This file is part of alpaka. | ||
| * | ||
| * alpaka is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * alpaka is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with alpaka. | ||
| * If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #pragma once | ||
|
|
||
| #include <boost/predef.h> // workarounds | ||
|
|
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| #include <cstddef> // std::size_t | ||
|
|
||
| namespace alpaka | ||
| { | ||
| namespace core | ||
| { | ||
| namespace detail | ||
| { | ||
| //############################################################################# | ||
| // Based on the code from Filip Roséen at http://b.atch.se/posts/constexpr-counter/ | ||
| //############################################################################# | ||
| /*template< | ||
| std::size_t N> | ||
| struct flag; | ||
| //----------------------------------------------------------------------------- | ||
| // | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N> | ||
| constexpr int adl_flag(flag<N>);*/ | ||
|
|
||
| //############################################################################# | ||
| // | ||
| //############################################################################# | ||
| template< | ||
| std::size_t N> | ||
| struct flag | ||
| { | ||
| friend constexpr std::size_t adl_flag(flag<N>); | ||
| }; | ||
|
|
||
| //############################################################################# | ||
| // | ||
| //############################################################################# | ||
| template< | ||
| std::size_t N> | ||
| struct writer | ||
| { | ||
| //----------------------------------------------------------------------------- | ||
| // | ||
| //----------------------------------------------------------------------------- | ||
| friend constexpr std::size_t adl_flag(flag<N>) | ||
| { | ||
| return N; | ||
| } | ||
|
|
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| static constexpr std::size_t value = N; | ||
| }; | ||
|
|
||
| #ifdef BOOST_COMP_MSVC | ||
| //----------------------------------------------------------------------------- | ||
| //! The matcher. | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N, | ||
| class = char[noexcept(adl_flag(flag<N>{})) ? +1u : -1u]> | ||
| auto constexpr reader(std::size_t, flag<N>) | ||
| -> std::size_t | ||
| { | ||
| return N; | ||
| } | ||
| #else | ||
| //----------------------------------------------------------------------------- | ||
| //! The matcher. | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N, | ||
| std::size_t = adl_flag(flag<N>{})> | ||
| auto constexpr reader( | ||
| std::size_t, | ||
| flag<N>) | ||
| -> std::size_t | ||
| { | ||
| return N; | ||
| } | ||
| #endif | ||
| //----------------------------------------------------------------------------- | ||
| //! The searcher. | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N> | ||
| auto constexpr reader( | ||
| float, | ||
| flag<N>, | ||
| std::size_t R = reader(std::size_t{0u}, flag<N-1u>{})) | ||
| -> std::size_t | ||
| { | ||
| return R; | ||
| } | ||
| //----------------------------------------------------------------------------- | ||
| //! Reader base case. | ||
| //----------------------------------------------------------------------------- | ||
| std::size_t constexpr reader(float, flag<0u>) | ||
| { | ||
| return 0u; | ||
| } | ||
|
|
||
| #ifdef BOOST_COMP_MSVC | ||
| //----------------------------------------------------------------------------- | ||
| //! \return An unique compile time ID. | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N = 1u, | ||
| std::size_t C = reader(std::size_t{0u}, flag<64u>{})> | ||
| auto constexpr uniqueId( | ||
| std::size_t R = writer<C + N>::value) | ||
| -> std::size_t | ||
| { | ||
| return R; | ||
| } | ||
| #else | ||
| //----------------------------------------------------------------------------- | ||
| //! \return An unique compile time ID. | ||
| //----------------------------------------------------------------------------- | ||
| template< | ||
| std::size_t N = 1u> | ||
| auto constexpr uniqueId( | ||
| std::size_t R = writer<reader(std::size_t{0u}, flag<64u>{}) + N>::value) | ||
| -> std::size_t | ||
| { | ||
| return R; | ||
| } | ||
| #endif | ||
| } | ||
| } | ||
| } |