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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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/**
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* \file
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* \brief Target platform dependent Java module for Symbian.
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*
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*/
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package com.nokia.microedition.m2g;
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import javax.microedition.lcdui.Graphics;
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import javax.microedition.lcdui.Image;
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import org.eclipse.swt.widgets.Display;
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import com.nokia.mj.impl.nokialcdui.LCDUIInvoker;
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import org.eclipse.swt.internal.extension.DisplayExtension;
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import org.eclipse.swt.internal.extension.Toolkit;
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/**
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* Implements platform-dependent functionality. At the moment, this
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* includes native finalization and some helper methods for
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* synchronizing 2D and 3D rendering.
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*/
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class Platform
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{
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/**
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* eSWT display for ui thread access
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*/
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private static Display display = null;
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private static boolean libraryLoaded = false;
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//------------------------------------------------------------------
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// Package private methods
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//------------------------------------------------------------------
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/**
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* Executes given runnable in UI thread if caller thread is not UI thread
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*/
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static void executeInUIThread(M2GRunnableQt obj)
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{
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if (display == null)
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{
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if (!uiThreadAvailable())
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{
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throw new Error("Ui thread not available");
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}
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}
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if (display.isDisposed())
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{
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throw new Error("Display already disposed");
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}
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if (obj != null)
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{
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// If we are not in UI thread use display
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if (Thread.currentThread() != display.getThread())
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{
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display.syncExec(obj);
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}
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else
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{
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// In this case we are in UI thread so just execute directly
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obj.run();
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}
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// Check if any exceptions occured in execution
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// and throw forward in caller thread
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obj.checkAndThrow();
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}
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}
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/**
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* Check the UI thread / toolkit init status and store display if it is available
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* @return true if either lcdui or eswt toolkit is initialized and ui thread is accessible
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* otherwise false
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*/
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static boolean uiThreadAvailable()
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{
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if (display != null)
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{
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return true;
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}
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else
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{
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//display = DisplayExtension.getDisplayInstance();
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//As now the thread is always available we are taking it from Toolkit.
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display = Toolkit. getInternalDisplay();
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if (display == null)
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{
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return false;
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}
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else
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{
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// UI thread is available, so load native library if not already loaded
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if (!libraryLoaded)
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{
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com.nokia.mj.impl.rt.support.Jvm.loadSystemLibrary("javam2g");
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libraryLoaded = true;
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}
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return true;
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}
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}
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}
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/**
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* Load Library if not already loaded
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*
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static void loadLibarary()
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{
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if (!libraryLoaded)
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{
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com.nokia.mj.impl.rt.support.Jvm.loadSystemLibrary("javam2g");
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libraryLoaded = true;
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}
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}*/
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/**
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* Registers an Object3D in the global handle-to-object map. The
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* handle of the object must already be set at this point!
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*/
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// static final void registerFinalizer(Object3D obj)
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// {
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// //heuristicGC();
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// }
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//
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// /**
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// * Registers a Graphics3D object (not derived from Object3D) for
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// * finalization.
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// */
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// static final void registerFinalizer(Graphics3D g3d)
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// {
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// //heuristicGC();
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// }
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//
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// /**
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// * Registers an Interface object for finalization
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// */
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// static final void registerFinalizer(Interface m2G)
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// {
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// }
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//
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// /**
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// * Registers a Loader object for finalization
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// */
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// static final void registerFinalizer(Loader loader)
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// {
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// }
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//
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// /**
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// * Flushes all pending rendering to a Graphics context and blocks
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// * until finished
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// */
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// static final void sync(Graphics g)
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// {
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// //ToolkitInvoker invoker = ToolkitInvoker.getToolkitInvoker();
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// //invoker.toolkitSync(invoker.getToolkit());
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// }
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//
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// /**
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// * Flushes all pending rendering to an Image object
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// */
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// static final void sync(Image img)
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// {
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// //ToolkitInvoker invoker = ToolkitInvoker.getToolkitInvoker();
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// //invoker.toolkitSync(invoker.getToolkit());
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// }
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//
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// /**
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// * Finalizes the native peer of an interface
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// */
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// static final native void finalizeInterface(int handle);
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//
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// /**
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// * Finalizes the native peer of an object
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// * JCF: added this wrapper method so we could pass the toolkit handle to the native method.
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// */
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static final void finalizeObject(int handle)
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{
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try
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{
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final int finalHandle = handle;
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executeInUIThread(
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new M2GRunnableQt()
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{
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void doRun()
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{
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_finalizeObject(finalHandle);
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}
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});
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}
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catch (Exception e)
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{
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// do nothing
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}
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}
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/**
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* Finalizes the native peer of an object associated with
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* given Interface instance
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*/
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// static final void finalizeObject(int handle, Interface aInterface)
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// {
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// try
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// {
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// final int finalHandle = handle;
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// executeInUIThread(
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// new M2GRunnableQt()
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// {
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// public void doRun()
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// {
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// _finalizeObject(finalHandle);
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// }
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// });
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// }
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// catch (Exception e)
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// {
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// // do nothing
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// }
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// }
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//------------------------------------------------------------------
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// Private methods
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//------------------------------------------------------------------
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/**
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* Trigger GC if minimum free memory limit has been exceeded in the native side
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*/
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static final void heuristicGC()
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{
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}
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private static final native void _finalizeObject(int handle);
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}
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