Rawat, Swati
97b7a6315d
* Update LICENSE * Update conf.py * Update copyright year * [fix] Update copyright year * Update copyright year "ROCm Developer Tools" * Add license headers to c++ files * Add license to *.py * Update licenses in rocdecode sources --------- Co-authored-by: srawat <120587655+SwRaw@users.noreply.github.com> Co-authored-by: Mythreya <mythreya.kuricheti@amd.com> Co-authored-by: Jonathan R. Madsen <jonathanrmadsen@gmail.com>
118 line
4.3 KiB
C++
118 line
4.3 KiB
C++
// MIT License
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//
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// Copyright (c) 2023-2025 Advanced Micro Devices, Inc.
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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
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// all 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
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// THE SOFTWARE.
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#pragma once
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#include "lib/common/defines.hpp"
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#include "lib/common/logging.hpp"
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#include "lib/common/static_object.hpp"
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#include <array>
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#include <cstddef>
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#include <functional>
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#include <mutex>
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#include <type_traits>
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namespace rocprofiler
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{
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namespace common
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{
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void
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destroy_static_tl_objects();
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/**
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* @brief This struct is used to create static singleton objects which have the properties of a
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* heap-allocated static object without a memory leak.
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*
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* @tparam Tp Data type of singleton
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* @tparam ContextT Use to differentiate singletons in different translation units (if using default
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* parameter) or ensure the singleton can be accessed in different translation units (not
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* recommended) as long as this type is not in an anonymous namespace
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*
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* This template works by creating a buffer of at least `sizeof(Tp)` bytes in the binary and does a
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* placement new into that buffer. The object created is NOT heap allocated, the address of the
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* object is an address in between the library load address and the load address + size of library.
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*/
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template <typename Tp, typename ContextT = anonymous>
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struct static_tl_object
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{
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static_tl_object() = delete;
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~static_tl_object() = delete;
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static_tl_object(const static_tl_object&) = delete;
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static_tl_object(static_tl_object&&) noexcept = delete;
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static_tl_object& operator=(const static_tl_object&) = delete;
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static_tl_object& operator=(static_tl_object&&) noexcept = delete;
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template <typename... Args>
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static Tp*& construct(Args&&... args);
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static Tp* get() { return m_object; }
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static constexpr bool is_trivial_standard_layout();
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private:
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static thread_local Tp* m_object;
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static thread_local std::array<std::byte, static_buffer_size<Tp>()> m_buffer;
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};
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template <typename Tp, typename ContextT>
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thread_local Tp* static_tl_object<Tp, ContextT>::m_object = nullptr;
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template <typename Tp, typename ContextT>
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thread_local std::array<std::byte, static_buffer_size<Tp>()>
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static_tl_object<Tp, ContextT>::m_buffer = {};
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template <typename Tp, typename ContextT>
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constexpr bool
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static_tl_object<Tp, ContextT>::is_trivial_standard_layout()
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{
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return (std::is_standard_layout<Tp>::value && std::is_trivially_destructible<Tp>::value);
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}
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template <typename Tp, typename ContextT>
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template <typename... Args>
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Tp*&
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static_tl_object<Tp, ContextT>::construct(Args&&... args)
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{
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if constexpr(!is_trivial_standard_layout())
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{
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static thread_local auto _once = std::once_flag{};
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std::call_once(_once, []() {
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register_static_dtor([]() {
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if(static_tl_object<Tp, ContextT>::m_object)
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{
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static_tl_object<Tp, ContextT>::m_object->~Tp();
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static_tl_object<Tp, ContextT>::m_object = nullptr;
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}
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});
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});
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}
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ROCP_FATAL_IF(m_object)
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<< "reconstructing static object. Use get() function to retrieve pointer";
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m_object = new(m_buffer.data()) Tp{std::forward<Args>(args)...};
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return m_object;
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}
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} // namespace common
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} // namespace rocprofiler
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