text: // win32_message_queue.hpp
  /*
   *  Copyright (c) 2007 Leigh Johnston.
   *
   *  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 Leigh Johnston nor the names of any
   *       other contributors to this software 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 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.
  */
  
  #pragma once
  
  #include <neolib/neolib.hpp>
  #include <deque>
  #include <optional>
  #include <neolib/task/async_task.hpp>
  #include <neolib/task/i_message_queue.hpp>
  
  namespace neolib
  {
      class win32_message_queue : public i_message_queue
      {
      public:
          win32_message_queue(async_task& aIoTask, std::function<bool()> aIdleFunction, bool aCreateTimer = true);
          ~win32_message_queue();
      public:
          bool have_message() const override;
          int get_message() const override;
          void bump() override;
  		bool in_idle() const override;
          void idle() override;
      private:
          static void CALLBACK timer_proc(HWND, UINT, UINT_PTR, DWORD);
      private:
          async_task& iIoTask;
          std::function<bool()> iIdleFunction;
          static std::map<UINT_PTR, win32_message_queue*> sTimerMap;
          UINT_PTR iTimer;
  		bool iInIdle;
      };
  }
  
  