1 /* 2 * Copyright (c) 2020, 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 jdk.internal.loader; 27 28 /** 29 * NativeLibrary represents a loaded native library instance. 30 */ 31 public interface NativeLibrary { 32 String name(); 33 34 /** 35 * Finds the address of the entry of the given name. Returns 0 36 * if not found. 37 * 38 * @param name the name of the symbol to be found 39 */ 40 long find(String name); 41 42 /** 43 * Finds the address of the entry of the given name. 44 * 45 * @param name the name of the symbol to be found 46 * @throws NoSuchMethodException if the named entry is not found. 47 */ 48 default long lookup(String name) throws NoSuchMethodException { 49 long addr = find(name); 50 if (0 == addr) { 51 throw new NoSuchMethodException("Cannot find symbol " + name + " in library " + name()); 52 } 53 return addr; 54 } 55 }