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Theodosius/dependencies/asmjit/core/zonelist.h

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// AsmJit - Machine code generation for C++
//
// * Official AsmJit Home Page: https://asmjit.com
// * Official Github Repository: https://github.com/asmjit/asmjit
//
// Copyright (c) 2008-2020 The AsmJit Authors
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
#ifndef ASMJIT_CORE_ZONELIST_H_INCLUDED
#define ASMJIT_CORE_ZONELIST_H_INCLUDED
#include "../core/support.h"
ASMJIT_BEGIN_NAMESPACE
//! \addtogroup asmjit_zone
//! \{
// ============================================================================
// [asmjit::ZoneListNode]
// ============================================================================
//! Node used by \ref ZoneList template.
template<typename NodeT>
class ZoneListNode {
public:
ASMJIT_NONCOPYABLE(ZoneListNode)
NodeT* _listNodes[Globals::kLinkCount];
//! \name Construction & Destruction
//! \{
inline ZoneListNode() noexcept
: _listNodes { nullptr, nullptr } {}
inline ZoneListNode(ZoneListNode&& other) noexcept
: _listNodes { other._listNodes[0], other._listNodes[1] } {}
//! \}
//! \name Accessors
//! \{
inline bool hasPrev() const noexcept { return _listNodes[Globals::kLinkPrev] != nullptr; }
inline bool hasNext() const noexcept { return _listNodes[Globals::kLinkNext] != nullptr; }
inline NodeT* prev() const noexcept { return _listNodes[Globals::kLinkPrev]; }
inline NodeT* next() const noexcept { return _listNodes[Globals::kLinkNext]; }
//! \}
};
// ============================================================================
// [asmjit::ZoneList<T>]
// ============================================================================
//! Zone allocated list container that uses nodes of `NodeT` type.
template <typename NodeT>
class ZoneList {
public:
ASMJIT_NONCOPYABLE(ZoneList)
NodeT* _nodes[Globals::kLinkCount];
//! \name Construction & Destruction
//! \{
inline ZoneList() noexcept
: _nodes { nullptr, nullptr } {}
inline ZoneList(ZoneList&& other) noexcept
: _nodes { other._nodes[0], other._nodes[1] } {}
inline void reset() noexcept {
_nodes[0] = nullptr;
_nodes[1] = nullptr;
}
//! \}
//! \name Accessors
//! \{
inline bool empty() const noexcept { return _nodes[0] == nullptr; }
inline NodeT* first() const noexcept { return _nodes[Globals::kLinkFirst]; }
inline NodeT* last() const noexcept { return _nodes[Globals::kLinkLast]; }
//! \}
//! \name Utilities
//! \{
inline void swap(ZoneList& other) noexcept {
std::swap(_nodes[0], other._nodes[0]);
std::swap(_nodes[1], other._nodes[1]);
}
// Can be used to both append and prepend.
inline void _addNode(NodeT* node, size_t dir) noexcept {
NodeT* prev = _nodes[dir];
node->_listNodes[!dir] = prev;
_nodes[dir] = node;
if (prev)
prev->_listNodes[dir] = node;
else
_nodes[!dir] = node;
}
// Can be used to both append and prepend.
inline void _insertNode(NodeT* ref, NodeT* node, size_t dir) noexcept {
ASMJIT_ASSERT(ref != nullptr);
NodeT* prev = ref;
NodeT* next = ref->_listNodes[dir];
prev->_listNodes[dir] = node;
if (next)
next->_listNodes[!dir] = node;
else
_nodes[dir] = node;
node->_listNodes[!dir] = prev;
node->_listNodes[ dir] = next;
}
inline void append(NodeT* node) noexcept { _addNode(node, Globals::kLinkLast); }
inline void prepend(NodeT* node) noexcept { _addNode(node, Globals::kLinkFirst); }
inline void insertAfter(NodeT* ref, NodeT* node) noexcept { _insertNode(ref, node, Globals::kLinkNext); }
inline void insertBefore(NodeT* ref, NodeT* node) noexcept { _insertNode(ref, node, Globals::kLinkPrev); }
inline NodeT* unlink(NodeT* node) noexcept {
NodeT* prev = node->prev();
NodeT* next = node->next();
if (prev) { prev->_listNodes[1] = next; node->_listNodes[0] = nullptr; } else { _nodes[0] = next; }
if (next) { next->_listNodes[0] = prev; node->_listNodes[1] = nullptr; } else { _nodes[1] = prev; }
node->_listNodes[0] = nullptr;
node->_listNodes[1] = nullptr;
return node;
}
inline NodeT* popFirst() noexcept {
NodeT* node = _nodes[0];
ASMJIT_ASSERT(node != nullptr);
NodeT* next = node->next();
_nodes[0] = next;
if (next) {
next->_listNodes[0] = nullptr;
node->_listNodes[1] = nullptr;
}
else {
_nodes[1] = nullptr;
}
return node;
}
inline NodeT* pop() noexcept {
NodeT* node = _nodes[1];
ASMJIT_ASSERT(node != nullptr);
NodeT* prev = node->prev();
_nodes[1] = prev;
if (prev) {
prev->_listNodes[1] = nullptr;
node->_listNodes[0] = nullptr;
}
else {
_nodes[0] = nullptr;
}
return node;
}
//! \}
};
//! \}
ASMJIT_END_NAMESPACE
#endif // ASMJIT_CORE_ZONELIST_H_INCLUDED