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79 lines
2.7 KiB
79 lines
2.7 KiB
/****************************************************************************
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Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
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http://www.cocos.com
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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 to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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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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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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****************************************************************************/
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#pragma once
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#include <boost/container/pmr/global_resource.hpp>
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#include <boost/container/pmr/polymorphic_allocator.hpp>
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#include <boost/container/pmr/unsynchronized_pool_resource.hpp>
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#include <memory>
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namespace cc {
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namespace render {
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template <class T>
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struct PmrDeallocator {
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void operator()(T* ptr) noexcept {
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mAllocator.deallocate(ptr, 1);
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}
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boost::container::pmr::polymorphic_allocator<T> mAllocator;
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};
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template <class T, class... Args>
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[[nodiscard]] T*
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newPmr(boost::container::pmr::memory_resource* mr, Args&&... args) {
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boost::container::pmr::polymorphic_allocator<T> alloc(mr);
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std::unique_ptr<T, PmrDeallocator<T>> ptr{
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alloc.allocate(1), PmrDeallocator<T>{alloc}};
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// construct, might throw
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alloc.construct(ptr.get(), std::forward<Args>(args)...);
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return ptr.release();
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}
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struct PmrDeleter {
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template <class T>
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void operator()(T* ptr) const noexcept {
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if (ptr) {
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boost::container::pmr::polymorphic_allocator<T> alloc(ptr->get_allocator());
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ptr->~T();
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alloc.deallocate(ptr, 1);
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}
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}
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};
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template <class T>
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using PmrUniquePtr = std::unique_ptr<T, PmrDeleter>;
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template <class T, class... Args>
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PmrUniquePtr<T>
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allocatePmrUniquePtr(const boost::container::pmr::polymorphic_allocator<std::byte>& alloc, Args&&... args) {
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return PmrUniquePtr<T>(newPmr<T>(alloc.resource(), std::forward<Args>(args)...));
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}
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} // namespace render
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} // namespace cc
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