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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <boost/intrusive/list.hpp>
#include "common/assert.h"
#include "core/hle/kernel/slab_helpers.h"
namespace Kernel {
class KernelCore;
class KLinkedListNode : public boost::intrusive::list_base_hook<>,
public KSlabAllocated<KLinkedListNode> {
public:
explicit KLinkedListNode(KernelCore&) {}
KLinkedListNode() = default;
void Initialize(void* it) {
m_item = it;
}
void* GetItem() const {
return m_item;
}
private:
void* m_item = nullptr;
};
template <typename T>
class KLinkedList : private boost::intrusive::list<KLinkedListNode> {
private:
using BaseList = boost::intrusive::list<KLinkedListNode>;
public:
template <bool Const>
class Iterator;
using value_type = T;
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>;
using reverse_iterator = std::reverse_iterator<iterator>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
template <bool Const>
class Iterator {
private:
using BaseIterator = BaseList::iterator;
friend class KLinkedList;
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = typename KLinkedList::value_type;
using difference_type = typename KLinkedList::difference_type;
using pointer = std::conditional_t<Const, KLinkedList::const_pointer, KLinkedList::pointer>;
using reference =
std::conditional_t<Const, KLinkedList::const_reference, KLinkedList::reference>;
public:
explicit Iterator(BaseIterator it) : m_base_it(it) {}
pointer GetItem() const {
return static_cast<pointer>(m_base_it->GetItem());
}
bool operator==(const Iterator& rhs) const {
return m_base_it == rhs.m_base_it;
}
bool operator!=(const Iterator& rhs) const {
return !(*this == rhs);
}
pointer operator->() const {
return this->GetItem();
}
reference operator*() const {
return *this->GetItem();
}
Iterator& operator++() {
++m_base_it;
return *this;
}
Iterator& operator--() {
--m_base_it;
return *this;
}
Iterator operator++(int) {
const Iterator it{*this};
++(*this);
return it;
}
Iterator operator--(int) {
const Iterator it{*this};
--(*this);
return it;
}
operator Iterator<true>() const {
return Iterator<true>(m_base_it);
}
private:
BaseIterator m_base_it;
};
public:
constexpr KLinkedList(KernelCore& kernel_) : BaseList(), kernel{kernel_} {}
~KLinkedList() {
// Erase all elements.
for (auto it = begin(); it != end(); it = erase(it)) {
}
// Ensure we succeeded.
ASSERT(this->empty());
}
// Iterator accessors.
iterator begin() {
return iterator(BaseList::begin());
}
const_iterator begin() const {
return const_iterator(BaseList::begin());
}
iterator end() {
return iterator(BaseList::end());
}
const_iterator end() const {
return const_iterator(BaseList::end());
}
const_iterator cbegin() const {
return this->begin();
}
const_iterator cend() const {
return this->end();
}
reverse_iterator rbegin() {
return reverse_iterator(this->end());
}
const_reverse_iterator rbegin() const {
return const_reverse_iterator(this->end());
}
reverse_iterator rend() {
return reverse_iterator(this->begin());
}
const_reverse_iterator rend() const {
return const_reverse_iterator(this->begin());
}
const_reverse_iterator crbegin() const {
return this->rbegin();
}
const_reverse_iterator crend() const {
return this->rend();
}
// Content management.
using BaseList::empty;
using BaseList::size;
reference back() {
return *(--this->end());
}
const_reference back() const {
return *(--this->end());
}
reference front() {
return *this->begin();
}
const_reference front() const {
return *this->begin();
}
iterator insert(const_iterator pos, reference ref) {
KLinkedListNode* new_node = KLinkedListNode::Allocate(kernel);
ASSERT(new_node != nullptr);
new_node->Initialize(std::addressof(ref));
return iterator(BaseList::insert(pos.m_base_it, *new_node));
}
void push_back(reference ref) {
this->insert(this->end(), ref);
}
void push_front(reference ref) {
this->insert(this->begin(), ref);
}
void pop_back() {
this->erase(--this->end());
}
void pop_front() {
this->erase(this->begin());
}
iterator erase(const iterator pos) {
KLinkedListNode* freed_node = std::addressof(*pos.m_base_it);
iterator ret = iterator(BaseList::erase(pos.m_base_it));
KLinkedListNode::Free(kernel, freed_node);
return ret;
}
private:
KernelCore& kernel;
};
} // namespace Kernel
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