Experimental CompressibleString UMA

third_party/WebKit/Source/wtf/WTFThreadData.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #define WTFThreadData_h
 
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/ThreadSpecific.h"
 #include "wtf/Threading.h"
 #include "wtf/WTFExport.h"
 #include "wtf/text/StringHash.h"
 
+namespace blink {
+
+// TODO(hajimehoshi): CompressibleStringTable should be moved from blink to WTF
+// namespace. Fix this forward declaration when we do this.
+class CompressibleStringTable;
+
+typedef void (*CompressibleStringTableDestructor)(CompressibleStringTable*);
+
+}
+
 namespace WTF {
 
 class AtomicStringTable;
 struct ICUConverterWrapper;
 
 typedef void (*AtomicStringTableDestructor)(AtomicStringTable*);
 
 class WTF_EXPORT WTFThreadData {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     WTF_MAKE_NONCOPYABLE(WTFThreadData);
 public:
     WTFThreadData();
     ~WTFThreadData();
 
     AtomicStringTable* atomicStringTable()
     {
         return m_atomicStringTable;
     }
 
+    blink::CompressibleStringTable* compressibleStringTable()
+    {
+        return m_compressibleStringTable;
+    }
+
     ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
 
 private:
     AtomicStringTable* m_atomicStringTable;
     AtomicStringTableDestructor m_atomicStringTableDestructor;
+    blink::CompressibleStringTable* m_compressibleStringTable;
+    blink::CompressibleStringTableDestructor m_compressibleStringTableDestructor;
     OwnPtr<ICUConverterWrapper> m_cachedConverterICU;
 
     static ThreadSpecific<WTFThreadData>* staticData;
     friend WTFThreadData& wtfThreadData();
     friend class AtomicStringTable;
+    friend class blink::CompressibleStringTable;
 };
 
 inline WTFThreadData& wtfThreadData()
 {
     // WRT WebCore:
     //    WTFThreadData is used on main thread before it could possibly be used
     //    on secondary ones, so there is no need for synchronization here.
     // WRT JavaScriptCore:
     //    wtfThreadData() is initially called from initializeThreading(), ensuring
     //    this is initially called in a pthread_once locked context.
     if (!WTFThreadData::staticData)
         WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
     return **WTFThreadData::staticData;
 }
 
 } // namespace WTF
 
 using WTF::WTFThreadData;
 using WTF::wtfThreadData;
 
 #endif // WTFThreadData_h