FormatCache.h

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//===-- FormatCache.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 LLDB_DATAFORMATTERS_FORMATCACHE_H
#define LLDB_DATAFORMATTERS_FORMATCACHE_H
 
#include <map>
#include <mutex>
 
#include "lldb/Utility/ConstString.h"
#include "lldb/lldb-public.h"
 
namespace lldb_private {
class FormatCache {
private:
  struct Entry {
  private:
    bool m_format_cached : 1;
    bool m_summary_cached : 1;
    bool m_synthetic_cached : 1;
 
    lldb::TypeFormatImplSP m_format_sp;
    lldb::TypeSummaryImplSP m_summary_sp;
    lldb::SyntheticChildrenSP m_synthetic_sp;
 
  public:
    Entry();
 
    template<typename ImplSP> bool IsCached();
    bool IsFormatCached();
    bool IsSummaryCached();
    bool IsSyntheticCached();
 
    void Get(lldb::TypeFormatImplSP &);
    void Get(lldb::TypeSummaryImplSP &);
    void Get(lldb::SyntheticChildrenSP &);
 
    void Set(lldb::TypeFormatImplSP);
    void Set(lldb::TypeSummaryImplSP);
    void Set(lldb::SyntheticChildrenSP);
  };
  typedef std::map<ConstString, Entry> CacheMap;
  CacheMap m_map;
  std::recursive_mutex m_mutex;
 
  uint64_t m_cache_hits = 0;
  uint64_t m_cache_misses = 0;
 
  Entry &GetEntry(ConstString type);
 
public:
  FormatCache() = default;
 
  template <typename ImplSP> bool Get(ConstString type, ImplSP &format_impl_sp);
  void Set(ConstString type, lldb::TypeFormatImplSP &format_sp);
  void Set(ConstString type, lldb::TypeSummaryImplSP &summary_sp);
  void Set(ConstString type, lldb::SyntheticChildrenSP &synthetic_sp);
 
  void Clear();
 
  uint64_t GetCacheHits() { return m_cache_hits; }
 
  uint64_t GetCacheMisses() { return m_cache_misses; }
};
 
} // namespace lldb_private
 
#endif // LLDB_DATAFORMATTERS_FORMATCACHE_H