StringPool.h

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//===- StringPool.h ---------------------------------------------*- 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_DWARFLINKER_STRINGPOOL_H
#define LLVM_DWARFLINKER_STRINGPOOL_H
 
#include "llvm/ADT/ConcurrentHashtable.h"
#include "llvm/CodeGen/DwarfStringPoolEntry.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/PerThreadBumpPtrAllocator.h"
#include <string_view>
 
namespace llvm {
namespace dwarf_linker {
 
/// StringEntry keeps data of the string: the length, external offset
/// and a string body which is placed right after StringEntry.
using StringEntry = StringMapEntry<EmptyStringSetTag>;
 
class StringPool
    : public ConcurrentHashTableByPtr<
          StringRef, StringEntry, llvm::parallel::PerThreadBumpPtrAllocator> {
public:
  StringPool()
      : ConcurrentHashTableByPtr<StringRef, StringEntry,
                                 llvm::parallel::PerThreadBumpPtrAllocator>(
            Allocator) {}
 
  StringPool(size_t InitialSize)
      : ConcurrentHashTableByPtr<StringRef, StringEntry,
                                 llvm::parallel::PerThreadBumpPtrAllocator>(
            Allocator, InitialSize) {}
 
  llvm::parallel::PerThreadBumpPtrAllocator &getAllocatorRef() {
    return Allocator;
  }
 
  void clear() { Allocator.Reset(); }
 
private:
  llvm::parallel::PerThreadBumpPtrAllocator Allocator;
};
 
} // namespace dwarf_linker
} // end namespace llvm
 
#endif // LLVM_DWARFLINKER_STRINGPOOL_H