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library / src / main / java / org / distorted / library / main / InternalMaster.java @ fb001aff

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski                                                               //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// Distorted is free software: you can redistribute it and/or modify                             //
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// it under the terms of the GNU General Public License as published by                          //
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// the Free Software Foundation, either version 2 of the License, or                             //
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// (at your option) any later version.                                                           //
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//                                                                                               //
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// Distorted is distributed in the hope that it will be useful,                                  //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //
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// GNU General Public License for more details.                                                  //
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//                                                                                               //
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// You should have received a copy of the GNU General Public License                             //
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// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.main;
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import java.util.ArrayList;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * This static class handles assigning jobs to other classes. It does it once, at the beginning of
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 * each frame.
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 * <p>
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 * Not part of public API, do not document (public only because has to be used in PostprocessEffects)
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 *
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 * @y.exclude
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 */
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public class InternalMaster
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  {
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  public interface Slave
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    {
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    void doWork();
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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  private InternalMaster()
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    {
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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  static boolean toDo()
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    {
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    Slave slave;
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    ArrayList<Slave> list = InternalStackFrameList.getSet();
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    int numSlaves = list.size();
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    try
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      {
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      for(int i=0; i<numSlaves; i++)
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        {
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        slave = list.remove(0);
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        if( slave!=null ) slave.doWork();
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        }
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      }
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    catch(IndexOutOfBoundsException ie)
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      {
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      // onDestroy must have been called, ignore
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      }
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    return numSlaves>0;
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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  public static void newSlave(Slave s)
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    {
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    ArrayList<Slave> list = InternalStackFrameList.getSet();
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    int num = list.size();
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    boolean found = false;
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    Slave tmp;
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    try
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      {
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      for(int i=0; i<num; i++)
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        {
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        tmp = list.get(i);
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        if( tmp==s )
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          {
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          found = true;
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          break;
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          }
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        }
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      }
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    catch(IndexOutOfBoundsException ie)
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      {
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      // onDestroy must have been called, ignore
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      }
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    if( !found ) list.add(s);
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    }
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  }
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