77 lines
3.3 KiB
C++
77 lines
3.3 KiB
C++
/** @file IAllocator_Xfer.hpp
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*
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* @author Roland Conybeare, Dec 2025
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**/
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#pragma once
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#include "AAllocator.hpp"
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namespace xo {
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namespace mm {
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/** @class IAllocator_Xfer
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*
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* Adapts typed allocator implementation @tparam IAllocator_DRepr
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* to type-erased @ref AAllocator interface
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**/
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template <typename DRepr, typename IAllocator_DRepr>
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struct IAllocator_Xfer : public AAllocator {
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// parallel interface to AAllocator, with specific data type
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using Impl = IAllocator_DRepr;
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using size_type = AAllocator::size_type;
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using value_type = AAllocator::value_type;
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static const DRepr & _dcast(Copaque d) { return *(const DRepr *)d; }
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static DRepr & _dcast(Opaque d) { return *(DRepr *)d; }
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// from AAllocator
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// const methods
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int32_t _typeseq() const noexcept override { return s_typeseq; }
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std::string_view name(Copaque d) const noexcept override { return I::name(_dcast(d)); }
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size_type reserved(Copaque d) const noexcept override { return I::reserved(_dcast(d)); }
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size_type size(Copaque d) const noexcept override { return I::size(_dcast(d)); }
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size_type committed(Copaque d) const noexcept override { return I::committed(_dcast(d)); }
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size_type available(Copaque d) const noexcept override { return I::available(_dcast(d)); }
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size_type allocated(Copaque d) const noexcept override { return I::allocated(_dcast(d)); }
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bool contains(Copaque d, const void * p) const noexcept override {
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return I::contains(_dcast(d), p);
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}
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AllocatorError last_error(Copaque d) const noexcept override { return I::last_error(_dcast(d)); }
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// non-const methods
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bool expand(Opaque d,
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std::size_t z) const noexcept override { return I::expand(_dcast(d), z); }
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value_type alloc(Opaque d,
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std::size_t z) const override { return I::alloc(_dcast(d), z); }
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value_type super_alloc(Opaque d,
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std::size_t z) const override { return I::super_alloc(_dcast(d), z); }
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value_type sub_alloc(Opaque d,
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std::size_t z,
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bool complete_flag) const override {
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return I::sub_alloc(_dcast(d), z, complete_flag);
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}
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void clear(Opaque d) const override { return I::clear(_dcast(d)); }
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void destruct_data(Opaque d) const override { return I::destruct_data(_dcast(d)); }
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private:
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using I = Impl;
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public:
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static int32_t s_typeseq;
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static bool _valid;
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};
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template <typename DRepr, typename IAllocator_DRepr>
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int32_t
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IAllocator_Xfer<DRepr, IAllocator_DRepr>::s_typeseq = facet::typeseq::id<DRepr>();
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template <typename DRepr, typename IAllocator_DRepr>
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bool
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IAllocator_Xfer<DRepr, IAllocator_DRepr>::_valid = facet::valid_facet_implementation<AAllocator, IAllocator_Xfer>();
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} /*namespace mm*/
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} /*namespace xo*/
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/* end IAllocator_Xfer.hpp */
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