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2600ca8b3f
This time there is no additional include of llvm/Config/config.h at all. Instead I use a hard-coded preprecessor symbol: LLVM_COMPACTIFY_SENTINELS (should this work on the self-hosting buildbot, then cleanups come next) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80035 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
//==-- llvm/ADT/ilist_node.h - Intrusive Linked List Helper ------*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the ilist_node class template, which is a convenient
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// base class for creating classes that can be used with ilists.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_ILIST_NODE_H
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#define LLVM_ADT_ILIST_NODE_H
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#undef LLVM_COMPACTIFY_SENTINELS
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/// @brief activate small sentinel structs
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/// Comment out if you want better debuggability
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/// of ilist<> end() iterators.
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/// See also llvm/ADT/ilist.h, where the
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/// same change must be made.
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///
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#define LLVM_COMPACTIFY_SENTINELS 1
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namespace llvm {
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template<typename NodeTy>
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struct ilist_traits;
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/// ilist_half_node - Base class that provides prev services for sentinels.
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///
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template<typename NodeTy>
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class ilist_half_node {
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friend struct ilist_traits<NodeTy>;
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NodeTy *Prev;
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protected:
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NodeTy *getPrev() { return Prev; }
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const NodeTy *getPrev() const { return Prev; }
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void setPrev(NodeTy *P) { Prev = P; }
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ilist_half_node() : Prev(0) {}
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};
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template<typename NodeTy>
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struct ilist_nextprev_traits;
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/// ilist_node - Base class that provides next/prev services for nodes
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/// that use ilist_nextprev_traits or ilist_default_traits.
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///
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template<typename NodeTy>
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class ilist_node : ilist_half_node<NodeTy> {
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friend struct ilist_nextprev_traits<NodeTy>;
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friend struct ilist_traits<NodeTy>;
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NodeTy *Next;
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NodeTy *getNext() { return Next; }
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const NodeTy *getNext() const { return Next; }
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void setNext(NodeTy *N) { Next = N; }
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protected:
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ilist_node() : Next(0) {}
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};
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/// When assertions are off, the Next field of sentinels
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/// will not be accessed. So it is not necessary to allocate
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/// space for it. The following macro selects the most
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/// efficient traits class. The LLVM_COMPACTIFY_SENTINELS
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/// preprocessor symbol controls this.
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///
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#if defined(LLVM_COMPACTIFY_SENTINELS) && LLVM_COMPACTIFY_SENTINELS
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# define ILIST_NODE ilist_half_node
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#else
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# define ILIST_NODE ilist_node
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#endif
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} // End llvm namespace
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#endif
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