1 /* 2 * Copyright (c) 2011, 2012, 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 javax.tools.annotation.GenerateNativeHeader; 28 29 /* No native methods here, but the constants are needed in the supporting JNI code */ 30 @GenerateNativeHeader 31 public class Pointer <T> implements Comparable<Pointer<T>>{ 32 long ptr; 33 34 protected Pointer(final long ptr) { 35 this.ptr = ptr; 36 getNativeObjectLifecycleManager().begin(ptr); 37 } 38 39 @Override protected final synchronized void finalize() throws Throwable { 40 long pptr = ptr; 41 ptr = 0; 42 if (pptr != 0) getNativeObjectLifecycleManager().end(pptr); 43 } 44 45 protected NativeObjectLifecycleManager getNativeObjectLifecycleManager() { 46 return NativeObjectLifecycleManager.Nothing.INST; 47 } 48 49 @Override public boolean equals(Object o) { 50 return o instanceof Pointer && ptr == ((Pointer) o).ptr; 51 } 52 53 @Override public int hashCode() { return (int)(ptr^(ptr>>>32)); } 54 55 public int compareTo(Pointer<T> o) { 56 if(this==o || ptr==o.ptr) return 0; 57 if(ptr < o.ptr) return -1; 58 return 1; 59 } 60 }