text: //
  // Copyright (c) 2008-2020 the Urho3D project.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #pragma once
  
  #include <EASTL/unique_ptr.h>
  
  #include "../Container/Str.h"
  #include "../Core/Variant.h"
  #include "../Math/StringHash.h"
  
  namespace Urho3D
  {
  
  class Mutex;
  class StringHash;
  
  /// Helper class used for StringHash reversing.
  class URHO3D_API StringHashRegister
  {
  public:
      /// Construct. threadSafe controls whether the RegisterString and GetStringCopy are thread-safe.
      StringHashRegister(bool threadSafe);
      /// Destruct.
      ~StringHashRegister();
  
      /// Register string for hash reverse mapping. Could be used from StringHash ctor.
      StringHash RegisterString(const StringHash& hash, const char* string);
      /// Register string for hash reverse mapping.
      StringHash RegisterString(const char* string);
      /// Return string for given StringHash. Return empty string if not found.
      ea::string GetStringCopy(const StringHash& hash) const;
      /// Return whether the string in contained in the register.
      bool Contains(const StringHash& hash) const;
  
      /// Return String for given StringHash. Return value is unsafe to use if RegisterString is called from other threads.
      const ea::string& GetString(const StringHash& hash) const;
      /// Return map of hashes. Return value is unsafe to use if RegisterString is called from other threads.
      const StringMap& GetInternalMap() const { return map_; }
  
  private:
      /// Hash to string map.
      StringMap map_;
      /// Mutex.
      ea::unique_ptr<Mutex> mutex_;
  };
  
  }
  