common: add intrusive list type
This commit is contained in:
Liam
parent
9bf19b04f6
commit
2afaa7aed7
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@ -0,0 +1,631 @@
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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include "common/common_funcs.h"
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#include "common/parent_of_member.h"
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namespace Common {
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// Forward declare implementation class for Node.
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namespace impl {
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class IntrusiveListImpl;
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}
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class IntrusiveListNode {
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YUZU_NON_COPYABLE(IntrusiveListNode);
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private:
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friend class impl::IntrusiveListImpl;
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IntrusiveListNode* m_prev;
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IntrusiveListNode* m_next;
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public:
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constexpr IntrusiveListNode() : m_prev(this), m_next(this) {}
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constexpr bool IsLinked() const {
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return m_next != this;
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}
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private:
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constexpr void LinkPrev(IntrusiveListNode* node) {
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// We can't link an already linked node.
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ASSERT(!node->IsLinked());
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this->SplicePrev(node, node);
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}
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constexpr void SplicePrev(IntrusiveListNode* first, IntrusiveListNode* last) {
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// Splice a range into the list.
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auto last_prev = last->m_prev;
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first->m_prev = m_prev;
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last_prev->m_next = this;
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m_prev->m_next = first;
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m_prev = last_prev;
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}
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constexpr void LinkNext(IntrusiveListNode* node) {
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// We can't link an already linked node.
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ASSERT(!node->IsLinked());
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return this->SpliceNext(node, node);
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}
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constexpr void SpliceNext(IntrusiveListNode* first, IntrusiveListNode* last) {
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// Splice a range into the list.
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auto last_prev = last->m_prev;
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first->m_prev = this;
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last_prev->m_next = m_next;
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m_next->m_prev = last_prev;
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m_next = first;
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}
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constexpr void Unlink() {
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this->Unlink(m_next);
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}
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constexpr void Unlink(IntrusiveListNode* last) {
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// Unlink a node from a next node.
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auto last_prev = last->m_prev;
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m_prev->m_next = last;
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last->m_prev = m_prev;
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last_prev->m_next = this;
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m_prev = last_prev;
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}
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constexpr IntrusiveListNode* GetPrev() {
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return m_prev;
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}
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constexpr const IntrusiveListNode* GetPrev() const {
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return m_prev;
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}
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constexpr IntrusiveListNode* GetNext() {
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return m_next;
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}
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constexpr const IntrusiveListNode* GetNext() const {
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return m_next;
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}
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};
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// DEPRECATED: static_assert(std::is_literal_type<IntrusiveListNode>::value);
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namespace impl {
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class IntrusiveListImpl {
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YUZU_NON_COPYABLE(IntrusiveListImpl);
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private:
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IntrusiveListNode m_root_node;
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public:
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template <bool Const>
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class Iterator;
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using value_type = IntrusiveListNode;
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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using pointer = value_type*;
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using const_pointer = const value_type*;
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using reference = value_type&;
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using const_reference = const value_type&;
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using iterator = Iterator<false>;
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using const_iterator = Iterator<true>;
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using reverse_iterator = std::reverse_iterator<iterator>;
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using const_reverse_iterator = std::reverse_iterator<const_iterator>;
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template <bool Const>
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class Iterator {
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public:
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = typename IntrusiveListImpl::value_type;
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using difference_type = typename IntrusiveListImpl::difference_type;
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using pointer =
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std::conditional_t<Const, IntrusiveListImpl::const_pointer, IntrusiveListImpl::pointer>;
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using reference = std::conditional_t<Const, IntrusiveListImpl::const_reference,
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IntrusiveListImpl::reference>;
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private:
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pointer m_node;
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public:
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constexpr explicit Iterator(pointer n) : m_node(n) {}
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constexpr bool operator==(const Iterator& rhs) const {
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return m_node == rhs.m_node;
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}
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constexpr pointer operator->() const {
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return m_node;
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}
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constexpr reference operator*() const {
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return *m_node;
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}
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constexpr Iterator& operator++() {
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m_node = m_node->m_next;
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return *this;
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}
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constexpr Iterator& operator--() {
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m_node = m_node->m_prev;
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return *this;
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}
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constexpr Iterator operator++(int) {
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const Iterator it{*this};
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++(*this);
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return it;
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}
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constexpr Iterator operator--(int) {
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const Iterator it{*this};
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--(*this);
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return it;
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}
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constexpr operator Iterator<true>() const {
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return Iterator<true>(m_node);
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}
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constexpr Iterator<false> GetNonConstIterator() const {
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return Iterator<false>(const_cast<IntrusiveListImpl::pointer>(m_node));
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}
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};
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public:
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constexpr IntrusiveListImpl() : m_root_node() {}
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// Iterator accessors.
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constexpr iterator begin() {
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return iterator(m_root_node.GetNext());
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}
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constexpr const_iterator begin() const {
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return const_iterator(m_root_node.GetNext());
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}
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constexpr iterator end() {
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return iterator(std::addressof(m_root_node));
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}
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constexpr const_iterator end() const {
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return const_iterator(std::addressof(m_root_node));
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}
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constexpr iterator iterator_to(reference v) {
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// Only allow iterator_to for values in lists.
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ASSERT(v.IsLinked());
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return iterator(std::addressof(v));
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}
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constexpr const_iterator iterator_to(const_reference v) const {
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// Only allow iterator_to for values in lists.
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ASSERT(v.IsLinked());
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return const_iterator(std::addressof(v));
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}
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// Content management.
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constexpr bool empty() const {
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return !m_root_node.IsLinked();
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}
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constexpr size_type size() const {
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return static_cast<size_type>(std::distance(this->begin(), this->end()));
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}
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constexpr reference back() {
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return *m_root_node.GetPrev();
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}
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constexpr const_reference back() const {
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return *m_root_node.GetPrev();
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}
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constexpr reference front() {
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return *m_root_node.GetNext();
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}
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constexpr const_reference front() const {
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return *m_root_node.GetNext();
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}
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constexpr void push_back(reference node) {
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m_root_node.LinkPrev(std::addressof(node));
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}
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constexpr void push_front(reference node) {
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m_root_node.LinkNext(std::addressof(node));
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}
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constexpr void pop_back() {
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m_root_node.GetPrev()->Unlink();
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}
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constexpr void pop_front() {
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m_root_node.GetNext()->Unlink();
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}
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constexpr iterator insert(const_iterator pos, reference node) {
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pos.GetNonConstIterator()->LinkPrev(std::addressof(node));
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return iterator(std::addressof(node));
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}
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constexpr void splice(const_iterator pos, IntrusiveListImpl& o) {
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splice_impl(pos, o.begin(), o.end());
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}
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constexpr void splice(const_iterator pos, IntrusiveListImpl& o, const_iterator first) {
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const_iterator last(first);
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std::advance(last, 1);
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splice_impl(pos, first, last);
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}
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constexpr void splice(const_iterator pos, IntrusiveListImpl& o, const_iterator first,
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const_iterator last) {
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splice_impl(pos, first, last);
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}
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constexpr iterator erase(const_iterator pos) {
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if (pos == this->end()) {
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return this->end();
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}
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iterator it(pos.GetNonConstIterator());
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(it++)->Unlink();
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return it;
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}
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constexpr void clear() {
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while (!this->empty()) {
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this->pop_front();
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}
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}
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private:
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constexpr void splice_impl(const_iterator _pos, const_iterator _first, const_iterator _last) {
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if (_first == _last) {
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return;
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}
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iterator pos(_pos.GetNonConstIterator());
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iterator first(_first.GetNonConstIterator());
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iterator last(_last.GetNonConstIterator());
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first->Unlink(std::addressof(*last));
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pos->SplicePrev(std::addressof(*first), std::addressof(*first));
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}
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};
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} // namespace impl
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template <class T, class Traits>
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class IntrusiveList {
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YUZU_NON_COPYABLE(IntrusiveList);
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private:
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impl::IntrusiveListImpl m_impl;
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public:
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template <bool Const>
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class Iterator;
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using value_type = T;
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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using pointer = value_type*;
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using const_pointer = const value_type*;
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using reference = value_type&;
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using const_reference = const value_type&;
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using iterator = Iterator<false>;
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using const_iterator = Iterator<true>;
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using reverse_iterator = std::reverse_iterator<iterator>;
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using const_reverse_iterator = std::reverse_iterator<const_iterator>;
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template <bool Const>
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class Iterator {
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public:
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friend class Common::IntrusiveList<T, Traits>;
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using ImplIterator =
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std::conditional_t<Const, Common::impl::IntrusiveListImpl::const_iterator,
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Common::impl::IntrusiveListImpl::iterator>;
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = typename IntrusiveList::value_type;
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using difference_type = typename IntrusiveList::difference_type;
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using pointer =
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std::conditional_t<Const, IntrusiveList::const_pointer, IntrusiveList::pointer>;
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using reference =
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std::conditional_t<Const, IntrusiveList::const_reference, IntrusiveList::reference>;
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private:
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ImplIterator m_iterator;
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private:
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constexpr explicit Iterator(ImplIterator it) : m_iterator(it) {}
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constexpr ImplIterator GetImplIterator() const {
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return m_iterator;
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}
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public:
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constexpr bool operator==(const Iterator& rhs) const {
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return m_iterator == rhs.m_iterator;
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}
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constexpr pointer operator->() const {
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return std::addressof(Traits::GetParent(*m_iterator));
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}
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constexpr reference operator*() const {
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return Traits::GetParent(*m_iterator);
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}
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constexpr Iterator& operator++() {
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++m_iterator;
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return *this;
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}
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constexpr Iterator& operator--() {
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--m_iterator;
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return *this;
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}
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constexpr Iterator operator++(int) {
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const Iterator it{*this};
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++m_iterator;
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return it;
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}
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constexpr Iterator operator--(int) {
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const Iterator it{*this};
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--m_iterator;
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return it;
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}
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constexpr operator Iterator<true>() const {
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return Iterator<true>(m_iterator);
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}
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};
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private:
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static constexpr IntrusiveListNode& GetNode(reference ref) {
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return Traits::GetNode(ref);
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}
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static constexpr IntrusiveListNode const& GetNode(const_reference ref) {
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return Traits::GetNode(ref);
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}
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static constexpr reference GetParent(IntrusiveListNode& node) {
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return Traits::GetParent(node);
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}
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static constexpr const_reference GetParent(IntrusiveListNode const& node) {
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return Traits::GetParent(node);
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}
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public:
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constexpr IntrusiveList() : m_impl() {}
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// Iterator accessors.
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constexpr iterator begin() {
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return iterator(m_impl.begin());
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}
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constexpr const_iterator begin() const {
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return const_iterator(m_impl.begin());
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}
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constexpr iterator end() {
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return iterator(m_impl.end());
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}
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constexpr const_iterator end() const {
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return const_iterator(m_impl.end());
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}
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constexpr const_iterator cbegin() const {
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return this->begin();
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}
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constexpr const_iterator cend() const {
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return this->end();
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}
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constexpr reverse_iterator rbegin() {
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return reverse_iterator(this->end());
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}
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constexpr const_reverse_iterator rbegin() const {
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return const_reverse_iterator(this->end());
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}
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constexpr reverse_iterator rend() {
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return reverse_iterator(this->begin());
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}
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constexpr const_reverse_iterator rend() const {
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return const_reverse_iterator(this->begin());
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}
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constexpr const_reverse_iterator crbegin() const {
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return this->rbegin();
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}
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constexpr const_reverse_iterator crend() const {
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return this->rend();
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}
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constexpr iterator iterator_to(reference v) {
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return iterator(m_impl.iterator_to(GetNode(v)));
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}
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constexpr const_iterator iterator_to(const_reference v) const {
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return const_iterator(m_impl.iterator_to(GetNode(v)));
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}
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// Content management.
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constexpr bool empty() const {
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return m_impl.empty();
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}
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constexpr size_type size() const {
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return m_impl.size();
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}
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constexpr reference back() {
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return GetParent(m_impl.back());
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}
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constexpr const_reference back() const {
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return GetParent(m_impl.back());
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}
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constexpr reference front() {
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return GetParent(m_impl.front());
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}
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constexpr const_reference front() const {
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return GetParent(m_impl.front());
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}
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constexpr void push_back(reference ref) {
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m_impl.push_back(GetNode(ref));
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}
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constexpr void push_front(reference ref) {
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m_impl.push_front(GetNode(ref));
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}
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constexpr void pop_back() {
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m_impl.pop_back();
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}
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constexpr void pop_front() {
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m_impl.pop_front();
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}
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constexpr iterator insert(const_iterator pos, reference ref) {
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return iterator(m_impl.insert(pos.GetImplIterator(), GetNode(ref)));
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}
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constexpr void splice(const_iterator pos, IntrusiveList& o) {
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m_impl.splice(pos.GetImplIterator(), o.m_impl);
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}
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constexpr void splice(const_iterator pos, IntrusiveList& o, const_iterator first) {
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m_impl.splice(pos.GetImplIterator(), o.m_impl, first.GetImplIterator());
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}
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constexpr void splice(const_iterator pos, IntrusiveList& o, const_iterator first,
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const_iterator last) {
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m_impl.splice(pos.GetImplIterator(), o.m_impl, first.GetImplIterator(),
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last.GetImplIterator());
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}
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constexpr iterator erase(const_iterator pos) {
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return iterator(m_impl.erase(pos.GetImplIterator()));
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}
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constexpr void clear() {
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m_impl.clear();
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}
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};
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template <auto T, class Derived = Common::impl::GetParentType<T>>
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class IntrusiveListMemberTraits;
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template <class Parent, IntrusiveListNode Parent::*Member, class Derived>
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class IntrusiveListMemberTraits<Member, Derived> {
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public:
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using ListType = IntrusiveList<Derived, IntrusiveListMemberTraits>;
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private:
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friend class IntrusiveList<Derived, IntrusiveListMemberTraits>;
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static constexpr IntrusiveListNode& GetNode(Derived& parent) {
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return parent.*Member;
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}
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|
||||
static constexpr IntrusiveListNode const& GetNode(Derived const& parent) {
|
||||
return parent.*Member;
|
||||
}
|
||||
|
||||
static Derived& GetParent(IntrusiveListNode& node) {
|
||||
return Common::GetParentReference<Member, Derived>(std::addressof(node));
|
||||
}
|
||||
|
||||
static Derived const& GetParent(IntrusiveListNode const& node) {
|
||||
return Common::GetParentReference<Member, Derived>(std::addressof(node));
|
||||
}
|
||||
};
|
||||
|
||||
template <auto T, class Derived = Common::impl::GetParentType<T>>
|
||||
class IntrusiveListMemberTraitsByNonConstexprOffsetOf;
|
||||
|
||||
template <class Parent, IntrusiveListNode Parent::*Member, class Derived>
|
||||
class IntrusiveListMemberTraitsByNonConstexprOffsetOf<Member, Derived> {
|
||||
public:
|
||||
using ListType = IntrusiveList<Derived, IntrusiveListMemberTraitsByNonConstexprOffsetOf>;
|
||||
|
||||
private:
|
||||
friend class IntrusiveList<Derived, IntrusiveListMemberTraitsByNonConstexprOffsetOf>;
|
||||
|
||||
static constexpr IntrusiveListNode& GetNode(Derived& parent) {
|
||||
return parent.*Member;
|
||||
}
|
||||
|
||||
static constexpr IntrusiveListNode const& GetNode(Derived const& parent) {
|
||||
return parent.*Member;
|
||||
}
|
||||
|
||||
static Derived& GetParent(IntrusiveListNode& node) {
|
||||
return *reinterpret_cast<Derived*>(reinterpret_cast<char*>(std::addressof(node)) -
|
||||
GetOffset());
|
||||
}
|
||||
|
||||
static Derived const& GetParent(IntrusiveListNode const& node) {
|
||||
return *reinterpret_cast<const Derived*>(
|
||||
reinterpret_cast<const char*>(std::addressof(node)) - GetOffset());
|
||||
}
|
||||
|
||||
static uintptr_t GetOffset() {
|
||||
return reinterpret_cast<uintptr_t>(std::addressof(reinterpret_cast<Derived*>(0)->*Member));
|
||||
}
|
||||
};
|
||||
|
||||
template <class Derived>
|
||||
class IntrusiveListBaseNode : public IntrusiveListNode {};
|
||||
|
||||
template <class Derived>
|
||||
class IntrusiveListBaseTraits {
|
||||
public:
|
||||
using ListType = IntrusiveList<Derived, IntrusiveListBaseTraits>;
|
||||
|
||||
private:
|
||||
friend class IntrusiveList<Derived, IntrusiveListBaseTraits>;
|
||||
|
||||
static constexpr IntrusiveListNode& GetNode(Derived& parent) {
|
||||
return static_cast<IntrusiveListNode&>(
|
||||
static_cast<IntrusiveListBaseNode<Derived>&>(parent));
|
||||
}
|
||||
|
||||
static constexpr IntrusiveListNode const& GetNode(Derived const& parent) {
|
||||
return static_cast<const IntrusiveListNode&>(
|
||||
static_cast<const IntrusiveListBaseNode<Derived>&>(parent));
|
||||
}
|
||||
|
||||
static constexpr Derived& GetParent(IntrusiveListNode& node) {
|
||||
return static_cast<Derived&>(static_cast<IntrusiveListBaseNode<Derived>&>(node));
|
||||
}
|
||||
|
||||
static constexpr Derived const& GetParent(IntrusiveListNode const& node) {
|
||||
return static_cast<const Derived&>(
|
||||
static_cast<const IntrusiveListBaseNode<Derived>&>(node));
|
||||
}
|
||||
};
|
||||
|
||||
} // namespace Common
|
||||
Loading…
Reference in New Issue