yuzu-fork/src/common/intrusive_red_black_tree.h
Morph 99ceb03a1c general: Convert source file copyright comments over to SPDX
This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
2022-04-23 05:55:32 -04:00

628 lines
19 KiB
C++

// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "common/common_funcs.h"
#include "common/parent_of_member.h"
#include "common/tree.h"
namespace Common {
namespace impl {
class IntrusiveRedBlackTreeImpl;
}
#pragma pack(push, 4)
struct IntrusiveRedBlackTreeNode {
YUZU_NON_COPYABLE(IntrusiveRedBlackTreeNode);
public:
using RBEntry = freebsd::RBEntry<IntrusiveRedBlackTreeNode>;
private:
RBEntry m_entry;
public:
explicit IntrusiveRedBlackTreeNode() = default;
[[nodiscard]] constexpr RBEntry& GetRBEntry() {
return m_entry;
}
[[nodiscard]] constexpr const RBEntry& GetRBEntry() const {
return m_entry;
}
constexpr void SetRBEntry(const RBEntry& entry) {
m_entry = entry;
}
};
static_assert(sizeof(IntrusiveRedBlackTreeNode) ==
3 * sizeof(void*) + std::max<size_t>(sizeof(freebsd::RBColor), 4));
#pragma pack(pop)
template <class T, class Traits, class Comparator>
class IntrusiveRedBlackTree;
namespace impl {
class IntrusiveRedBlackTreeImpl {
YUZU_NON_COPYABLE(IntrusiveRedBlackTreeImpl);
private:
template <class, class, class>
friend class ::Common::IntrusiveRedBlackTree;
private:
using RootType = freebsd::RBHead<IntrusiveRedBlackTreeNode>;
private:
RootType m_root;
public:
template <bool Const>
class Iterator;
using value_type = IntrusiveRedBlackTreeNode;
using size_type = size_t;
using difference_type = ptrdiff_t;
using pointer = value_type*;
using const_pointer = const value_type*;
using reference = value_type&;
using const_reference = const value_type&;
using iterator = Iterator<false>;
using const_iterator = Iterator<true>;
template <bool Const>
class Iterator {
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = typename IntrusiveRedBlackTreeImpl::value_type;
using difference_type = typename IntrusiveRedBlackTreeImpl::difference_type;
using pointer = std::conditional_t<Const, IntrusiveRedBlackTreeImpl::const_pointer,
IntrusiveRedBlackTreeImpl::pointer>;
using reference = std::conditional_t<Const, IntrusiveRedBlackTreeImpl::const_reference,
IntrusiveRedBlackTreeImpl::reference>;
private:
pointer m_node;
public:
constexpr explicit Iterator(pointer n) : m_node(n) {}
constexpr bool operator==(const Iterator& rhs) const {
return m_node == rhs.m_node;
}
constexpr bool operator!=(const Iterator& rhs) const {
return !(*this == rhs);
}
constexpr pointer operator->() const {
return m_node;
}
constexpr reference operator*() const {
return *m_node;
}
constexpr Iterator& operator++() {
m_node = GetNext(m_node);
return *this;
}
constexpr Iterator& operator--() {
m_node = GetPrev(m_node);
return *this;
}
constexpr Iterator operator++(int) {
const Iterator it{*this};
++(*this);
return it;
}
constexpr Iterator operator--(int) {
const Iterator it{*this};
--(*this);
return it;
}
constexpr operator Iterator<true>() const {
return Iterator<true>(m_node);
}
};
private:
constexpr bool EmptyImpl() const {
return m_root.IsEmpty();
}
constexpr IntrusiveRedBlackTreeNode* GetMinImpl() const {
return freebsd::RB_MIN(const_cast<RootType&>(m_root));
}
constexpr IntrusiveRedBlackTreeNode* GetMaxImpl() const {
return freebsd::RB_MAX(const_cast<RootType&>(m_root));
}
constexpr IntrusiveRedBlackTreeNode* RemoveImpl(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_REMOVE(m_root, node);
}
public:
static constexpr IntrusiveRedBlackTreeNode* GetNext(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_NEXT(node);
}
static constexpr IntrusiveRedBlackTreeNode* GetPrev(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_PREV(node);
}
static constexpr IntrusiveRedBlackTreeNode const* GetNext(
IntrusiveRedBlackTreeNode const* node) {
return static_cast<const IntrusiveRedBlackTreeNode*>(
GetNext(const_cast<IntrusiveRedBlackTreeNode*>(node)));
}
static constexpr IntrusiveRedBlackTreeNode const* GetPrev(
IntrusiveRedBlackTreeNode const* node) {
return static_cast<const IntrusiveRedBlackTreeNode*>(
GetPrev(const_cast<IntrusiveRedBlackTreeNode*>(node)));
}
public:
constexpr IntrusiveRedBlackTreeImpl() = default;
// Iterator accessors.
constexpr iterator begin() {
return iterator(this->GetMinImpl());
}
constexpr const_iterator begin() const {
return const_iterator(this->GetMinImpl());
}
constexpr iterator end() {
return iterator(static_cast<IntrusiveRedBlackTreeNode*>(nullptr));
}
constexpr const_iterator end() const {
return const_iterator(static_cast<const IntrusiveRedBlackTreeNode*>(nullptr));
}
constexpr const_iterator cbegin() const {
return this->begin();
}
constexpr const_iterator cend() const {
return this->end();
}
constexpr iterator iterator_to(reference ref) {
return iterator(std::addressof(ref));
}
constexpr const_iterator iterator_to(const_reference ref) const {
return const_iterator(std::addressof(ref));
}
// Content management.
constexpr bool empty() const {
return this->EmptyImpl();
}
constexpr reference back() {
return *this->GetMaxImpl();
}
constexpr const_reference back() const {
return *this->GetMaxImpl();
}
constexpr reference front() {
return *this->GetMinImpl();
}
constexpr const_reference front() const {
return *this->GetMinImpl();
}
constexpr iterator erase(iterator it) {
auto cur = std::addressof(*it);
auto next = GetNext(cur);
this->RemoveImpl(cur);
return iterator(next);
}
};
} // namespace impl
template <typename T>
concept HasRedBlackKeyType = requires {
{ std::is_same<typename T::RedBlackKeyType, void>::value } -> std::convertible_to<bool>;
};
namespace impl {
template <typename T, typename Default>
consteval auto* GetRedBlackKeyType() {
if constexpr (HasRedBlackKeyType<T>) {
return static_cast<typename T::RedBlackKeyType*>(nullptr);
} else {
return static_cast<Default*>(nullptr);
}
}
} // namespace impl
template <typename T, typename Default>
using RedBlackKeyType = std::remove_pointer_t<decltype(impl::GetRedBlackKeyType<T, Default>())>;
template <class T, class Traits, class Comparator>
class IntrusiveRedBlackTree {
YUZU_NON_COPYABLE(IntrusiveRedBlackTree);
public:
using ImplType = impl::IntrusiveRedBlackTreeImpl;
private:
ImplType m_impl;
public:
template <bool Const>
class Iterator;
using value_type = T;
using size_type = size_t;
using difference_type = ptrdiff_t;
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using iterator = Iterator<false>;
using const_iterator = Iterator<true>;
using key_type = RedBlackKeyType<Comparator, value_type>;
using const_key_pointer = const key_type*;
using const_key_reference = const key_type&;
template <bool Const>
class Iterator {
public:
friend class IntrusiveRedBlackTree<T, Traits, Comparator>;
using ImplIterator =
std::conditional_t<Const, ImplType::const_iterator, ImplType::iterator>;
using iterator_category = std::bidirectional_iterator_tag;
using value_type = typename IntrusiveRedBlackTree::value_type;
using difference_type = typename IntrusiveRedBlackTree::difference_type;
using pointer = std::conditional_t<Const, IntrusiveRedBlackTree::const_pointer,
IntrusiveRedBlackTree::pointer>;
using reference = std::conditional_t<Const, IntrusiveRedBlackTree::const_reference,
IntrusiveRedBlackTree::reference>;
private:
ImplIterator m_impl;
private:
constexpr explicit Iterator(ImplIterator it) : m_impl(it) {}
constexpr explicit Iterator(typename ImplIterator::pointer p) : m_impl(p) {}
constexpr ImplIterator GetImplIterator() const {
return m_impl;
}
public:
constexpr bool operator==(const Iterator& rhs) const {
return m_impl == rhs.m_impl;
}
constexpr bool operator!=(const Iterator& rhs) const {
return !(*this == rhs);
}
constexpr pointer operator->() const {
return Traits::GetParent(std::addressof(*m_impl));
}
constexpr reference operator*() const {
return *Traits::GetParent(std::addressof(*m_impl));
}
constexpr Iterator& operator++() {
++m_impl;
return *this;
}
constexpr Iterator& operator--() {
--m_impl;
return *this;
}
constexpr Iterator operator++(int) {
const Iterator it{*this};
++m_impl;
return it;
}
constexpr Iterator operator--(int) {
const Iterator it{*this};
--m_impl;
return it;
}
constexpr operator Iterator<true>() const {
return Iterator<true>(m_impl);
}
};
private:
static constexpr int CompareImpl(const IntrusiveRedBlackTreeNode* lhs,
const IntrusiveRedBlackTreeNode* rhs) {
return Comparator::Compare(*Traits::GetParent(lhs), *Traits::GetParent(rhs));
}
static constexpr int CompareKeyImpl(const_key_reference key,
const IntrusiveRedBlackTreeNode* rhs) {
return Comparator::Compare(key, *Traits::GetParent(rhs));
}
// Define accessors using RB_* functions.
constexpr IntrusiveRedBlackTreeNode* InsertImpl(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_INSERT(m_impl.m_root, node, CompareImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindImpl(IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_FIND(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
constexpr IntrusiveRedBlackTreeNode* NFindImpl(IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_NFIND(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindKeyImpl(const_key_reference key) const {
return freebsd::RB_FIND_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
constexpr IntrusiveRedBlackTreeNode* NFindKeyImpl(const_key_reference key) const {
return freebsd::RB_NFIND_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindExistingImpl(
IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_FIND_EXISTING(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindExistingKeyImpl(const_key_reference key) const {
return freebsd::RB_FIND_EXISTING_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
public:
constexpr IntrusiveRedBlackTree() = default;
// Iterator accessors.
constexpr iterator begin() {
return iterator(m_impl.begin());
}
constexpr const_iterator begin() const {
return const_iterator(m_impl.begin());
}
constexpr iterator end() {
return iterator(m_impl.end());
}
constexpr const_iterator end() const {
return const_iterator(m_impl.end());
}
constexpr const_iterator cbegin() const {
return this->begin();
}
constexpr const_iterator cend() const {
return this->end();
}
constexpr iterator iterator_to(reference ref) {
return iterator(m_impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
}
constexpr const_iterator iterator_to(const_reference ref) const {
return const_iterator(m_impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
}
// Content management.
constexpr bool empty() const {
return m_impl.empty();
}
constexpr reference back() {
return *Traits::GetParent(std::addressof(m_impl.back()));
}
constexpr const_reference back() const {
return *Traits::GetParent(std::addressof(m_impl.back()));
}
constexpr reference front() {
return *Traits::GetParent(std::addressof(m_impl.front()));
}
constexpr const_reference front() const {
return *Traits::GetParent(std::addressof(m_impl.front()));
}
constexpr iterator erase(iterator it) {
return iterator(m_impl.erase(it.GetImplIterator()));
}
constexpr iterator insert(reference ref) {
ImplType::pointer node = Traits::GetNode(std::addressof(ref));
this->InsertImpl(node);
return iterator(node);
}
constexpr iterator find(const_reference ref) const {
return iterator(this->FindImpl(Traits::GetNode(std::addressof(ref))));
}
constexpr iterator nfind(const_reference ref) const {
return iterator(this->NFindImpl(Traits::GetNode(std::addressof(ref))));
}
constexpr iterator find_key(const_key_reference ref) const {
return iterator(this->FindKeyImpl(ref));
}
constexpr iterator nfind_key(const_key_reference ref) const {
return iterator(this->NFindKeyImpl(ref));
}
constexpr iterator find_existing(const_reference ref) const {
return iterator(this->FindExistingImpl(Traits::GetNode(std::addressof(ref))));
}
constexpr iterator find_existing_key(const_key_reference ref) const {
return iterator(this->FindExistingKeyImpl(ref));
}
};
template <auto T, class Derived = Common::impl::GetParentType<T>>
class IntrusiveRedBlackTreeMemberTraits;
template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
class IntrusiveRedBlackTreeMemberTraits<Member, Derived> {
public:
template <class Comparator>
using TreeType = IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeMemberTraits, Comparator>;
using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
private:
template <class, class, class>
friend class IntrusiveRedBlackTree;
friend class impl::IntrusiveRedBlackTreeImpl;
static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
return std::addressof(parent->*Member);
}
static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
return std::addressof(parent->*Member);
}
static Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
static Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
};
template <auto T, class Derived = Common::impl::GetParentType<T>>
class IntrusiveRedBlackTreeMemberTraitsDeferredAssert;
template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
class IntrusiveRedBlackTreeMemberTraitsDeferredAssert<Member, Derived> {
public:
template <class Comparator>
using TreeType =
IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeMemberTraitsDeferredAssert, Comparator>;
using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
private:
template <class, class, class>
friend class IntrusiveRedBlackTree;
friend class impl::IntrusiveRedBlackTreeImpl;
static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
return std::addressof(parent->*Member);
}
static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
return std::addressof(parent->*Member);
}
static Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
static Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
};
template <class Derived>
class alignas(void*) IntrusiveRedBlackTreeBaseNode : public IntrusiveRedBlackTreeNode {
public:
using IntrusiveRedBlackTreeNode::IntrusiveRedBlackTreeNode;
constexpr Derived* GetPrev() {
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetPrev(this)));
}
constexpr const Derived* GetPrev() const {
return static_cast<const Derived*>(static_cast<const IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetPrev(this)));
}
constexpr Derived* GetNext() {
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetNext(this)));
}
constexpr const Derived* GetNext() const {
return static_cast<const Derived*>(static_cast<const IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetNext(this)));
}
};
template <class Derived>
class IntrusiveRedBlackTreeBaseTraits {
public:
template <class Comparator>
using TreeType = IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeBaseTraits, Comparator>;
using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
private:
template <class, class, class>
friend class IntrusiveRedBlackTree;
friend class impl::IntrusiveRedBlackTreeImpl;
static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
return static_cast<IntrusiveRedBlackTreeNode*>(
static_cast<IntrusiveRedBlackTreeBaseNode<Derived>*>(parent));
}
static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
return static_cast<const IntrusiveRedBlackTreeNode*>(
static_cast<const IntrusiveRedBlackTreeBaseNode<Derived>*>(parent));
}
static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode<Derived>*>(node));
}
static constexpr Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return static_cast<const Derived*>(
static_cast<const IntrusiveRedBlackTreeBaseNode<Derived>*>(node));
}
};
} // namespace Common