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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 /** |
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18 * \file |
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19 * \brief Target platform dependent Java module for Symbian. |
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20 * |
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21 */ |
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22 |
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23 package com.nokia.microedition.m2g; |
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24 import javax.microedition.lcdui.Graphics; |
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25 import javax.microedition.lcdui.Image; |
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26 import org.eclipse.swt.widgets.Display; |
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27 |
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28 import com.nokia.mj.impl.nokialcdui.LCDUIInvoker; |
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29 import org.eclipse.swt.internal.extension.DisplayExtension; |
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30 import org.eclipse.swt.internal.extension.Toolkit; |
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31 |
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32 /** |
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33 * Implements platform-dependent functionality. At the moment, this |
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34 * includes native finalization and some helper methods for |
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35 * synchronizing 2D and 3D rendering. |
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36 */ |
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37 class Platform |
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38 { |
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39 /** |
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40 * eSWT display for ui thread access |
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41 */ |
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42 private static Display display = null; |
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43 private static boolean libraryLoaded = false; |
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44 |
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45 //------------------------------------------------------------------ |
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46 // Package private methods |
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47 //------------------------------------------------------------------ |
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48 |
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49 /** |
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50 * Executes given runnable in UI thread if caller thread is not UI thread |
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51 */ |
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52 static void executeInUIThread(M2GRunnableQt obj) |
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53 { |
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54 if (display == null) |
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55 { |
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56 if (!uiThreadAvailable()) |
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57 { |
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58 throw new Error("Ui thread not available"); |
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59 } |
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60 } |
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61 if (display.isDisposed()) |
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62 { |
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63 throw new Error("Display already disposed"); |
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64 } |
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65 |
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66 if (obj != null) |
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67 { |
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68 // If we are not in UI thread use display |
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69 if (Thread.currentThread() != display.getThread()) |
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70 { |
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71 display.syncExec(obj); |
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72 } |
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73 else |
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74 { |
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75 // In this case we are in UI thread so just execute directly |
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76 obj.run(); |
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77 } |
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78 // Check if any exceptions occured in execution |
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79 // and throw forward in caller thread |
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80 obj.checkAndThrow(); |
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81 } |
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82 } |
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83 |
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84 /** |
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85 * Check the UI thread / toolkit init status and store display if it is available |
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86 * @return true if either lcdui or eswt toolkit is initialized and ui thread is accessible |
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87 * otherwise false |
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88 */ |
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89 static boolean uiThreadAvailable() |
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90 { |
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91 if (display != null) |
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92 { |
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93 return true; |
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94 } |
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95 else |
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96 { |
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97 //display = DisplayExtension.getDisplayInstance(); |
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98 //As now the thread is always available we are taking it from Toolkit. |
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99 display = Toolkit. getInternalDisplay(); |
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100 |
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101 |
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102 if (display == null) |
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103 { |
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104 |
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105 return false; |
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106 } |
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107 else |
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108 { |
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109 |
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110 // UI thread is available, so load native library if not already loaded |
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111 if (!libraryLoaded) |
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112 { |
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113 |
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114 com.nokia.mj.impl.rt.support.Jvm.loadSystemLibrary("javam2g"); |
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115 libraryLoaded = true; |
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116 } |
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117 return true; |
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118 } |
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119 } |
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120 } |
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121 |
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122 /** |
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123 * Load Library if not already loaded |
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124 * |
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125 |
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126 static void loadLibarary() |
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127 { |
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128 if (!libraryLoaded) |
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129 { |
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130 |
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131 com.nokia.mj.impl.rt.support.Jvm.loadSystemLibrary("javam2g"); |
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132 libraryLoaded = true; |
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133 } |
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134 }*/ |
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135 |
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136 /** |
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137 * Registers an Object3D in the global handle-to-object map. The |
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138 * handle of the object must already be set at this point! |
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139 */ |
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140 // static final void registerFinalizer(Object3D obj) |
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141 // { |
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142 // //heuristicGC(); |
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143 // } |
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144 // |
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145 // /** |
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146 // * Registers a Graphics3D object (not derived from Object3D) for |
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147 // * finalization. |
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148 // */ |
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149 // static final void registerFinalizer(Graphics3D g3d) |
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150 // { |
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151 // //heuristicGC(); |
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152 // } |
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153 // |
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154 // /** |
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155 // * Registers an Interface object for finalization |
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156 // */ |
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157 // static final void registerFinalizer(Interface m2G) |
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158 // { |
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159 // } |
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160 // |
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161 // /** |
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162 // * Registers a Loader object for finalization |
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163 // */ |
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164 // static final void registerFinalizer(Loader loader) |
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165 // { |
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166 // } |
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167 // |
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168 // /** |
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169 // * Flushes all pending rendering to a Graphics context and blocks |
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170 // * until finished |
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171 // */ |
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172 // static final void sync(Graphics g) |
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173 // { |
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174 // //ToolkitInvoker invoker = ToolkitInvoker.getToolkitInvoker(); |
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175 // //invoker.toolkitSync(invoker.getToolkit()); |
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176 // } |
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177 // |
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178 // /** |
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179 // * Flushes all pending rendering to an Image object |
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180 // */ |
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181 // static final void sync(Image img) |
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182 // { |
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183 // //ToolkitInvoker invoker = ToolkitInvoker.getToolkitInvoker(); |
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184 // //invoker.toolkitSync(invoker.getToolkit()); |
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185 // } |
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186 // |
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187 // /** |
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188 // * Finalizes the native peer of an interface |
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189 // */ |
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190 // static final native void finalizeInterface(int handle); |
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191 // |
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192 // /** |
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193 // * Finalizes the native peer of an object |
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194 // * JCF: added this wrapper method so we could pass the toolkit handle to the native method. |
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195 // */ |
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196 static final void finalizeObject(int handle) |
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197 { |
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198 try |
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199 { |
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200 final int finalHandle = handle; |
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201 executeInUIThread( |
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202 new M2GRunnableQt() |
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203 { |
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204 void doRun() |
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205 { |
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206 _finalizeObject(finalHandle); |
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207 } |
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208 }); |
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209 } |
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210 catch (Exception e) |
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211 { |
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212 // do nothing |
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213 } |
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214 } |
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215 |
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216 /** |
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217 * Finalizes the native peer of an object associated with |
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218 * given Interface instance |
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219 */ |
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220 // static final void finalizeObject(int handle, Interface aInterface) |
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221 // { |
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222 // try |
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223 // { |
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224 // final int finalHandle = handle; |
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225 // executeInUIThread( |
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226 // new M2GRunnableQt() |
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227 // { |
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228 // public void doRun() |
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229 // { |
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230 // _finalizeObject(finalHandle); |
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231 // } |
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232 // }); |
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233 // } |
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234 // catch (Exception e) |
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235 // { |
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236 // // do nothing |
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237 // } |
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238 // } |
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239 |
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240 |
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241 //------------------------------------------------------------------ |
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242 // Private methods |
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243 //------------------------------------------------------------------ |
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244 |
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245 /** |
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246 * Trigger GC if minimum free memory limit has been exceeded in the native side |
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247 */ |
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248 static final void heuristicGC() |
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249 { |
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250 } |
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251 private static final native void _finalizeObject(int handle); |
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252 } |
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253 |