text: #ifndef FSLDEMOHOST_BASE_SERVICE_EVENTS_EVENTSSERVICE_HPP
  #define FSLDEMOHOST_BASE_SERVICE_EVENTS_EVENTSSERVICE_HPP
  /****************************************************************************************************************************************************
   * Copyright (c) 2014 Freescale Semiconductor, 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:
   *
   *    * Redistributions of source code must retain the above copyright notice,
   *      this list of conditions and the following disclaimer.
   *
   *    * Redistributions in binary form must reproduce the above copyright notice,
   *      this list of conditions and the following disclaimer in the documentation
   *      and/or other materials provided with the distribution.
   *
   *    * Neither the name of the Freescale Semiconductor, Inc. nor the names of
   *      its contributors may be used to endorse or promote products derived from
   *      this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************************************************************************************/
  
  #include <FslDemoApp/Base/Service/Events/IEventService.hpp>
  #include <FslDemoHost/Base/Service/Events/IEventPoster.hpp>
  #include <FslService/Consumer/ServiceProvider.hpp>
  #include <FslService/Impl/ServiceType/Local/ThreadLocalService.hpp>
  #include <list>
  #include <queue>
  #include <utility>
  
  namespace Fsl
  {
    class EventsService final
      : public ThreadLocalService
      , public IEventService
      , public IEventPoster
    {
      struct EventRecord
      {
        std::shared_ptr<IEvent> ComplexEvent;
        BasicEvent Event;
  
        explicit EventRecord(std::shared_ptr<IEvent> event)
          : ComplexEvent(std::move(event))
        {
        }
  
        explicit EventRecord(BasicEvent event)
          : Event(std::move(event))
        {
        }
      };
  
      using IEventListenerWeakPtr = std::weak_ptr<IEventListener>;
      using EventListenerList = std::list<IEventListenerWeakPtr>;
      using EventQueue = std::queue<EventRecord>;
      EventListenerList m_listeners;
      EventQueue m_eventQueue1;
      EventQueue m_eventQueue2;
      EventQueue* m_pEventQueue;
      bool m_isLocked;
  
    public:
      explicit EventsService(const ServiceProvider& serviceProvider);
  
      void Update() final;
  
      // From IEventService
      void Register(const std::weak_ptr<IEventListener>& subscriber) final;
      void Unregister(const std::weak_ptr<IEventListener>& subscriber) final;
      // From IEventPoster
      void Post(const std::shared_ptr<IEvent>& event) final;
      void Post(const BasicEvent& event) final;
  
    private:
      void SendEvent(const EventRecord& eventRecord);
    };
  }
  
  #endif
  