1 /* 2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package com.apple.jobjc; 26 27 import java.lang.reflect.Field; 28 import java.nio.ByteOrder; 29 import java.util.ArrayList; 30 import java.util.List; 31 32 import sun.misc.Unsafe; 33 34 35 public final class JObjCRuntime { 36 static { System.loadLibrary("JObjC"); } 37 38 public static enum Arch{ ppc, i386, x86_64 }; 39 public static enum Width{ W32, W64 }; 40 41 public static final Arch ARCH = getArch(); 42 public static final Width WIDTH = getWidth(); 43 44 private static Arch getArch(){ 45 String arch = System.getProperty("os.arch"); 46 if("ppc".equals(arch)) return Arch.ppc; 47 if("i386".equals(arch)) return Arch.i386; 48 if("x86_64".equals(arch)) return Arch.x86_64; 49 if("amd64".equals(arch)) return Arch.x86_64; 50 if("universal".equals(arch)) return Arch.x86_64; 51 throw new RuntimeException("Did not recognize os.arch system property: '" + arch + "'"); 52 } 53 54 private static Width getWidth(){ 55 String width = System.getProperty("sun.arch.data.model"); 56 if("32".equals(width)) return Width.W32; 57 if("64".equals(width)) return Width.W64; 58 throw new RuntimeException("Did not recognize sun.arch.data.model system property: '" + width + "'"); 59 } 60 61 public static final boolean IS32 = System.getProperty("sun.arch.data.model").equals("32"); 62 public static final boolean IS64 = System.getProperty("sun.arch.data.model").equals("64"); 63 public static final int PTR_LEN = IS64 ? 8 : 4; 64 public static final boolean IS_BIG_ENDIAN = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN; 65 static final boolean DEBUG = Boolean.parseBoolean(System.getProperty("JObjC.debug")); 66 67 static void checkPermission(){ 68 final SecurityManager security = System.getSecurityManager(); 69 if (security != null) security.checkPermission(new RuntimePermission("canProcessApplicationEvents")); 70 } 71 72 public final void assertOK(){ 73 if(this != instance) 74 throw new SecurityException("runtime"); 75 } 76 77 private JObjCRuntime(){} 78 79 private static JObjCRuntime instance; 80 static JObjCRuntime inst() { 81 if (instance == null) instance = new JObjCRuntime(); 82 return instance; 83 } 84 85 public static JObjCRuntime getInstance() { 86 checkPermission(); 87 return inst(); 88 } 89 90 public final NativeArgumentBuffer getThreadLocalState() { 91 return NativeArgumentBuffer.getThreadLocalBuffer(this); 92 } 93 94 final Unsafe unsafe = getUnsafe(); 95 final Subclassing subclassing = new Subclassing(this); 96 final List<String> registeredPackages = new ArrayList<String>(); 97 98 @SuppressWarnings("unchecked") 99 Class<? extends ID> getClassForNativeClassName(final String className) { 100 for (final String pkg : registeredPackages) { 101 try { 102 final Class<?> clazz = Class.forName(pkg + "." + className); 103 if (clazz != null) return (Class<? extends ID>)clazz; 104 } catch (final ClassNotFoundException e) { } 105 } 106 107 return null; 108 } 109 110 private final static Unsafe getUnsafe() { 111 Unsafe inst = null; 112 try { 113 Field f = Unsafe.class.getDeclaredField("theUnsafe"); 114 f.setAccessible(true); 115 inst = (Unsafe) f.get(null); 116 if(inst == null) throw new NullPointerException("Unsafe.theUnsafe == null"); 117 } catch (Exception e) { 118 throw new RuntimeException("Unable to get instance of Unsafe.", e); 119 } 120 return inst; 121 } 122 123 public void registerPackage(final String pkg) { 124 registeredPackages.add(pkg); 125 } 126 127 /** 128 * Register a subclass of NSObject to allow the native side to send 129 * messages which in turn call java methods declared on the class. 130 * If a native class by the same name already exists, registerClass 131 * will simply return without doing anything. 132 * 133 * For a usage example, see the SubclassingTest. 134 */ 135 public boolean registerUserClass(Class<? extends ID> clazz, Class<? extends NSClass> clazzClazz) { 136 return subclassing.registerUserClass(clazz, clazzClazz); 137 } 138 139 }