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35 lines
1.2 KiB
C++
35 lines
1.2 KiB
C++
/**
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* @file libpmr/memory_resource.h
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* @author mutouyun (orz@orzz.org)
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* @brief Implement memory allocation strategies that can be used by pmr::allocator.
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* @date 2022-11-13
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*/
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#pragma once
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#include <cstddef> // std::size_t, std::max_align_t
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#include "libimp/export.h"
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#include "libpmr/def.h"
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LIBPMR_NAMESPACE_BEG_
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/**
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* @brief A memory resource that uses the
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* global operator new and operator delete to allocate memory.
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*
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* @see https://en.cppreference.com/w/cpp/memory/new_delete_resource
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*/
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class LIBIMP_EXPORT new_delete_resource {
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public:
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/// @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
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/// @remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
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/// @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
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void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
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/// @brief Deallocates the storage pointed to by p.
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/// @see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
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void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
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};
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LIBPMR_NAMESPACE_END_
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