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/*
* Copyright (C) 2025 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#pragma once
#include <memory>
template <typename T>
using ExtUniquePtrT = std::unique_ptr<T, void (*)(T *)>;
template <typename T>
void cloneExt(ExtUniquePtrT<T> &dst, const T &src);
template <typename T>
void allocateExt(ExtUniquePtrT<T> &dst);
template <typename T>
void destroyExt(T *dst);
namespace Impl {
template <typename ParentT>
struct UniquePtrWrapperOps {
auto operator*() const noexcept(noexcept(std::declval<decltype(ParentT::ptr)>().operator*())) {
return *static_cast<const ParentT *>(this)->ptr;
}
auto operator->() const noexcept {
return static_cast<const ParentT *>(this)->ptr.operator->();
}
explicit operator bool() const noexcept {
return static_cast<bool>(static_cast<const ParentT *>(this)->ptr);
}
template <typename Rhs>
friend bool operator==(const ParentT &lhs, const Rhs &rhs) {
return lhs.ptr == rhs;
}
template <typename Lhs>
friend bool operator==(const Lhs &lhs, const ParentT &rhs) {
return lhs == rhs.ptr;
}
friend bool operator==(const ParentT &lhs, const ParentT &rhs) {
return lhs.ptr == rhs.ptr;
}
};
} // namespace Impl
template <typename T, bool allocateAtInit = false>
struct Ext : Impl::UniquePtrWrapperOps<Ext<T>> {
Ext(T *ptr) : ptr(ptr, destroyExt) {}
Ext() {
if constexpr (allocateAtInit) {
allocateExt(ptr);
}
}
Ext(const Ext &rhs) {
if (rhs.ptr.get()) {
cloneExt(this->ptr, *rhs.ptr.get());
}
}
Ext &operator=(const Ext &rhs) {
if (this == &rhs) {
return *this;
}
if (rhs.ptr.get()) {
cloneExt(this->ptr, *rhs.ptr.get());
} else {
ptr.reset();
}
return *this;
}
~Ext() = default;
Ext(Ext &&rhs) noexcept = default;
Ext &operator=(Ext &&rhs) noexcept = default;
ExtUniquePtrT<T> ptr{nullptr, destroyExt};
};
template <typename T>
struct Clonable : Impl::UniquePtrWrapperOps<Clonable<Ext<T>>> {
Clonable(T *ptr) : ptr(ptr) {}
Clonable() = default;
Clonable(const Clonable &rhs) {
if (rhs.ptr != nullptr) {
this->ptr = std::make_unique<T>(*rhs.ptr);
}
}
Clonable &operator=(const Clonable &rhs) {
if (this == &rhs) {
return *this;
}
if (rhs.ptr == nullptr) {
ptr.reset();
return *this;
}
this->ptr = std::make_unique<T>(*rhs.ptr);
return *this;
}
~Clonable() = default;
Clonable(Clonable &&rhs) noexcept = default;
Clonable &operator=(Clonable &&rhs) noexcept = default;
std::unique_ptr<T> ptr;
};
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