1 /* 2 * Copyright (c) 2009, 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 26 package java.util.zip; 27 28 import java.util.function.LongConsumer; 29 import java.util.function.LongSupplier; 30 import java.lang.ref.Cleaner.Cleanable; 31 import jdk.internal.ref.CleanerFactory; 32 33 /** 34 * A reference to the native zlib's z_stream structure. It also 35 * serves as the "cleaner" to clean up the native resource when 36 * the deflater or infalter is ended, closed or cleaned. 37 */ 38 class ZStreamRef implements Runnable { 39 40 private LongConsumer end; 41 private long address; 42 private final Cleanable cleanable; 43 44 ZStreamRef (Object owner, LongSupplier addr, LongConsumer end) { 45 this.cleanable = CleanerFactory.cleaner().register(owner, this); 46 this.end = end; 47 this.address = addr.getAsLong(); 48 } 49 50 long address() { 51 assert Thread.holdsLock(this); 52 return address; 53 } 54 55 void clean() { 56 cleanable.clean(); 57 } 58 59 public synchronized void run() { 60 long addr = address; 61 address = 0; 62 if (addr != 0) { 63 end.accept(addr); 64 } 65 } 66 }