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      1 //===-- FormatCache.h ---------------------------------------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef lldb_FormatCache_h_
     11 #define lldb_FormatCache_h_
     12 
     13 // C Includes
     14 // C++ Includes
     15 #include <map>
     16 
     17 // Other libraries and framework includes
     18 // Project includes
     19 #include "lldb/lldb-public.h"
     20 #include "lldb/Core/ConstString.h"
     21 #include "lldb/DataFormatters/FormatClasses.h"
     22 
     23 namespace lldb_private {
     24 class FormatCache
     25 {
     26 private:
     27     struct Entry
     28     {
     29     private:
     30         bool m_summary_cached : 1;
     31         bool m_synthetic_cached : 1;
     32 
     33         lldb::TypeSummaryImplSP m_summary_sp;
     34         lldb::SyntheticChildrenSP m_synthetic_sp;
     35     public:
     36         Entry ();
     37         Entry (const Entry& rhs);
     38         Entry (lldb::TypeSummaryImplSP);
     39         Entry (lldb::SyntheticChildrenSP);
     40         Entry (lldb::TypeSummaryImplSP,lldb::SyntheticChildrenSP);
     41 
     42         Entry& operator= (const Entry& rhs);
     43 
     44         bool
     45         IsSummaryCached ();
     46 
     47         bool
     48         IsSyntheticCached ();
     49 
     50         lldb::TypeSummaryImplSP
     51         GetSummary ();
     52 
     53         lldb::SyntheticChildrenSP
     54         GetSynthetic ();
     55 
     56         void
     57         SetSummary (lldb::TypeSummaryImplSP);
     58 
     59         void
     60         SetSynthetic (lldb::SyntheticChildrenSP);
     61     };
     62     typedef std::map<ConstString,Entry> CacheMap;
     63     CacheMap m_map;
     64     Mutex m_mutex;
     65 
     66     uint64_t m_cache_hits;
     67     uint64_t m_cache_misses;
     68 
     69     Entry&
     70     GetEntry (const ConstString& type);
     71 
     72 public:
     73     FormatCache ();
     74 
     75     bool
     76     GetSummary (const ConstString& type,lldb::TypeSummaryImplSP& summary_sp);
     77 
     78     bool
     79     GetSynthetic (const ConstString& type,lldb::SyntheticChildrenSP& synthetic_sp);
     80 
     81     void
     82     SetSummary (const ConstString& type,lldb::TypeSummaryImplSP& summary_sp);
     83 
     84     void
     85     SetSynthetic (const ConstString& type,lldb::SyntheticChildrenSP& synthetic_sp);
     86 
     87     void
     88     Clear ();
     89 
     90     uint64_t
     91     GetCacheHits ()
     92     {
     93         return m_cache_hits;
     94     }
     95 
     96     uint64_t
     97     GetCacheMisses ()
     98     {
     99         return m_cache_misses;
    100     }
    101 };
    102 } // namespace lldb_private
    103 
    104 #endif	// lldb_FormatCache_h_
    105