lldb/DataFormatters/FormatCache.h

0001 //===-- FormatCache.h ---------------------------------------------*- C++
0002 //-*-===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef LLDB_DATAFORMATTERS_FORMATCACHE_H
0011 #define LLDB_DATAFORMATTERS_FORMATCACHE_H
0012
0013 #include <map>
0014 #include <mutex>
0015
0016 #include "lldb/Utility/ConstString.h"
0017 #include "lldb/lldb-public.h"
0018
0019 namespace lldb_private {
0020 class FormatCache {
0021 private:
0022   struct Entry {
0023   private:
0024     bool m_format_cached : 1;
0025     bool m_summary_cached : 1;
0026     bool m_synthetic_cached : 1;
0027
0028     lldb::TypeFormatImplSP m_format_sp;
0029     lldb::TypeSummaryImplSP m_summary_sp;
0030     lldb::SyntheticChildrenSP m_synthetic_sp;
0031
0032   public:
0033     Entry();
0034
0035     template<typename ImplSP> bool IsCached();
0036     bool IsFormatCached();
0037     bool IsSummaryCached();
0038     bool IsSyntheticCached();
0039
0040     void Get(lldb::TypeFormatImplSP &);
0041     void Get(lldb::TypeSummaryImplSP &);
0042     void Get(lldb::SyntheticChildrenSP &);
0043
0044     void Set(lldb::TypeFormatImplSP);
0045     void Set(lldb::TypeSummaryImplSP);
0046     void Set(lldb::SyntheticChildrenSP);
0047   };
0048   std::map<ConstString, Entry> m_entries;
0049   std::recursive_mutex m_mutex;
0050
0051   uint64_t m_cache_hits = 0;
0052   uint64_t m_cache_misses = 0;
0053
0054 public:
0055   FormatCache() = default;
0056
0057   template <typename ImplSP> bool Get(ConstString type, ImplSP &format_impl_sp);
0058   void Set(ConstString type, lldb::TypeFormatImplSP &format_sp);
0059   void Set(ConstString type, lldb::TypeSummaryImplSP &summary_sp);
0060   void Set(ConstString type, lldb::SyntheticChildrenSP &synthetic_sp);
0061
0062   void Clear();
0063
0064   uint64_t GetCacheHits() { return m_cache_hits; }
0065
0066   uint64_t GetCacheMisses() { return m_cache_misses; }
0067 };
0068
0069 } // namespace lldb_private
0070
0071 #endif // LLDB_DATAFORMATTERS_FORMATCACHE_H