6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
//===- llvm/ADT/ilist_node_base.h - Intrusive List Node Base -----*- C++ -*-==//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ADT_ILIST_NODE_BASE_H
|
|
#define LLVM_ADT_ILIST_NODE_BASE_H
|
|
|
|
#include "llvm/ADT/PointerIntPair.h"
|
|
|
|
namespace llvm {
|
|
|
|
namespace ilist_detail {
|
|
|
|
template <class NodeBase, bool EnableSentinelTracking> class node_base_prevnext;
|
|
|
|
template <class NodeBase> class node_base_prevnext<NodeBase, false> {
|
|
NodeBase *Prev = nullptr;
|
|
NodeBase *Next = nullptr;
|
|
|
|
public:
|
|
void setPrev(NodeBase *Prev) { this->Prev = Prev; }
|
|
void setNext(NodeBase *Next) { this->Next = Next; }
|
|
NodeBase *getPrev() const { return Prev; }
|
|
NodeBase *getNext() const { return Next; }
|
|
|
|
bool isKnownSentinel() const { return false; }
|
|
void initializeSentinel() {}
|
|
};
|
|
|
|
template <class NodeBase> class node_base_prevnext<NodeBase, true> {
|
|
PointerIntPair<NodeBase *, 1> PrevAndSentinel;
|
|
NodeBase *Next = nullptr;
|
|
|
|
public:
|
|
void setPrev(NodeBase *Prev) { PrevAndSentinel.setPointer(Prev); }
|
|
void setNext(NodeBase *Next) { this->Next = Next; }
|
|
NodeBase *getPrev() const { return PrevAndSentinel.getPointer(); }
|
|
NodeBase *getNext() const { return Next; }
|
|
|
|
bool isSentinel() const { return PrevAndSentinel.getInt(); }
|
|
bool isKnownSentinel() const { return isSentinel(); }
|
|
void initializeSentinel() { PrevAndSentinel.setInt(true); }
|
|
};
|
|
|
|
template <class ParentTy> class node_base_parent {
|
|
ParentTy *Parent = nullptr;
|
|
|
|
public:
|
|
void setNodeBaseParent(ParentTy *Parent) { this->Parent = Parent; }
|
|
inline const ParentTy *getNodeBaseParent() const { return Parent; }
|
|
inline ParentTy *getNodeBaseParent() { return Parent; }
|
|
};
|
|
template <> class node_base_parent<void> {};
|
|
|
|
} // end namespace ilist_detail
|
|
|
|
/// Base class for ilist nodes.
|
|
///
|
|
/// Optionally tracks whether this node is the sentinel.
|
|
template <bool EnableSentinelTracking, class ParentTy>
|
|
class ilist_node_base : public ilist_detail::node_base_prevnext<
|
|
ilist_node_base<EnableSentinelTracking, ParentTy>,
|
|
EnableSentinelTracking>,
|
|
public ilist_detail::node_base_parent<ParentTy> {};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_ADT_ILIST_NODE_BASE_H
|