6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===- StringPool.h ---------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DWARFLINKER_STRINGPOOL_H
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#define LLVM_DWARFLINKER_STRINGPOOL_H
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#include "llvm/ADT/ConcurrentHashtable.h"
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#include "llvm/CodeGen/DwarfStringPoolEntry.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/PerThreadBumpPtrAllocator.h"
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#include <string_view>
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namespace llvm {
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namespace dwarf_linker {
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/// StringEntry keeps data of the string: the length, external offset
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/// and a string body which is placed right after StringEntry.
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using StringEntry = StringMapEntry<std::nullopt_t>;
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class StringPoolEntryInfo {
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public:
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/// \returns Hash value for the specified \p Key.
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static inline uint64_t getHashValue(const StringRef &Key) {
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return xxh3_64bits(Key);
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}
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/// \returns true if both \p LHS and \p RHS are equal.
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static inline bool isEqual(const StringRef &LHS, const StringRef &RHS) {
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return LHS == RHS;
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}
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/// \returns key for the specified \p KeyData.
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static inline StringRef getKey(const StringEntry &KeyData) {
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return KeyData.getKey();
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}
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/// \returns newly created object of KeyDataTy type.
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static inline StringEntry *
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create(const StringRef &Key,
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llvm::parallel::PerThreadBumpPtrAllocator &Allocator) {
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return StringEntry::create(Key, Allocator);
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}
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};
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class StringPool
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: public ConcurrentHashTableByPtr<StringRef, StringEntry,
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llvm::parallel::PerThreadBumpPtrAllocator,
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StringPoolEntryInfo> {
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public:
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StringPool()
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: ConcurrentHashTableByPtr<StringRef, StringEntry,
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llvm::parallel::PerThreadBumpPtrAllocator,
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StringPoolEntryInfo>(Allocator) {}
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StringPool(size_t InitialSize)
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: ConcurrentHashTableByPtr<StringRef, StringEntry,
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llvm::parallel::PerThreadBumpPtrAllocator,
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StringPoolEntryInfo>(Allocator, InitialSize) {}
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llvm::parallel::PerThreadBumpPtrAllocator &getAllocatorRef() {
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return Allocator;
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}
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void clear() { Allocator.Reset(); }
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private:
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llvm::parallel::PerThreadBumpPtrAllocator Allocator;
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};
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} // namespace dwarf_linker
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} // end namespace llvm
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#endif // LLVM_DWARFLINKER_STRINGPOOL_H
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