text: /*
  
   Copyright (c) 2014, Robin Raymond
   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 documentation
   and/or other materials provided with the distribution.
  
   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 OWNER 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.
  
   The views and conclusions contained in the software and documentation are those
   of the authors and should not be interpreted as representing official policies,
   either expressed or implied, of the FreeBSD Project.
   
   */
  
  #pragma once
  
  #ifndef ZSLIB_INTERNAL_MESSAGEQUEUETHREADPOOL_H_e140ea49aaff413fed9a0487ce58baa64fba5a51
  #define ZSLIB_INTERNAL_MESSAGEQUEUETHREADPOOL_H_e140ea49aaff413fed9a0487ce58baa64fba5a51
  
  #include <zsLib/IMessageQueueThreadPool.h>
  
  #include <queue>
  
  namespace zsLib
  {
    namespace internal
    {
      ZS_DECLARE_CLASS_PTR(MessageQueueThreadPoolDispatcherThread)
      ZS_DECLARE_CLASS_PTR(MessageQueueThreadPoolQueueNotifier)
  
      //-------------------------------------------------------------------------
      //-------------------------------------------------------------------------
      //-------------------------------------------------------------------------
      //-------------------------------------------------------------------------
      #pragma mark
      #pragma mark MessageQueueThreadPool
      #pragma mark
  
      class MessageQueueThreadPool : public IMessageQueueThreadPool
      {
      protected:
        friend interaction IMessageQueueThreadPool;
        friend MessageQueueThreadPoolQueueNotifier;
        friend MessageQueueThreadPoolDispatcherThread;
  
        struct make_private {};
  
        typedef std::list<MessageQueueThreadPoolDispatcherThreadPtr> DispatcherThreadList;
        typedef std::queue<MessageQueueThreadPoolDispatcherThreadPtr> DispatcherThreadQueue;
        typedef std::queue<MessageQueueThreadPoolQueueNotifierPtr> MessageNotifierQueue;
  
      protected:
  
      public:
        MessageQueueThreadPool(const make_private &) {}
        ~MessageQueueThreadPool() {}
  
      protected:
        static MessageQueueThreadPoolPtr create();
  
        virtual void createThread(
                                  const char *threadName = NULL,
                                  ThreadPriorities threadPriority = ThreadPriority_NormalPriority
                                  ) override;
  
        virtual void waitForShutdown() override;
  
        virtual bool hasPendingMessages() override;
  
        virtual IMessageQueuePtr createQueue() override;
  
        virtual void setThreadPriority(ThreadPriorities threadPriority) override;
  
      protected:
        void init();
  
        void notifyPosted(MessageQueueThreadPoolQueueNotifierPtr queue);
        void notifyIdle(MessageQueueThreadPoolDispatcherThreadPtr dispatcher);
        void processOneQueue();
  
      protected:
        MessageQueueThreadPoolWeakPtr mThisWeak;
        mutable Lock mLock;
  
        DispatcherThreadList mThreads;
        DispatcherThreadQueue mIdleThreads;
        MessageNotifierQueue mPendingQueues;
  
        size_t mMissingIdle {0};
      };
      
    }
  }
  
  #endif //ZSLIB_INTERNAL_MESSAGEQUEUETHREADPOOL_H_e140ea49aaff413fed9a0487ce58baa64fba5a51
  