Jonathan R. Madsen
086218c2eb
* Update LICENSE - fix inconsistencies * Revert lib/rocprofiler/counters/parser/scanner.cpp * Update lib/rocprofiler/counters/tests/dimension.cpp - revert ending curly brace * Revert missing curly braces - missing curly braces when file did not end with a new line
110 wiersze
3.0 KiB
C++
110 wiersze
3.0 KiB
C++
// MIT License
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//
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// Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#pragma once
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#include <array>
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#include <atomic>
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#include <cstddef>
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#include <utility>
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namespace rocprofiler
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{
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namespace context
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{
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template <typename Tp, size_t N = 8>
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struct locality_allocator
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{
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void construct(Tp* const _p, const Tp& _v) const { ::new((void*) _p) Tp{_v}; }
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void construct(Tp* const _p, Tp&& _v) const { ::new((void*) _p) Tp{std::move(_v)}; }
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void destroy(Tp* const _p) const { _p->~Tp(); }
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static constexpr auto size = sizeof(Tp);
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using buffer_value_t = char[size];
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struct buffer_entry
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{
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std::atomic_flag flag = ATOMIC_FLAG_INIT;
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buffer_value_t value = {};
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void* get()
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{
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if(flag.test_and_set())
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{
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return &value[0];
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}
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return nullptr;
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}
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bool reset(void* p)
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{
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if(static_cast<void*>(&value[0]) == p)
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{
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flag.clear();
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return true;
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}
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return false;
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}
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};
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static auto& get_buffer()
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{
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static auto _v = std::array<buffer_entry, N>{};
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return _v;
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}
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Tp* allocate(const size_t n) const
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{
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if(n == 0) return nullptr;
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if(n == 1)
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{
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// try an find in buffer for data locality
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for(auto& itr : get_buffer())
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{
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auto* _p = itr.get();
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if(_p) return static_cast<Tp*>(_p);
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}
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}
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auto* _p = new char[n * size];
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return reinterpret_cast<Tp*>(_p);
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}
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void deallocate(Tp* const ptr, const size_t /*unused*/) const
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{
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for(auto& itr : get_buffer())
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{
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if(itr.reset(ptr)) return;
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}
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delete ptr;
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}
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Tp* allocate(const size_t n, const void* const /* hint */) const { return allocate(n); }
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void reserve(const size_t) {}
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};
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} // namespace context
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} // namespace rocprofiler
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