1 /* 2 * Copyright (c) 2018, 2019, 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.platform.cgroupv1; 27 28 import jdk.internal.platform.CgroupSubsystemController; 29 30 public class CgroupV1SubsystemController implements CgroupSubsystemController { 31 32 // Values returned larger than this number are unlimited. 33 static long UNLIMITED_MIN = 0x7FFFFFFFFF000000L; 34 String root; 35 String mountPoint; 36 String path; 37 38 public CgroupV1SubsystemController(String root, String mountPoint) { 39 this.root = root; 40 this.mountPoint = mountPoint; 41 } 42 43 public void setPath(String cgroupPath) { 44 if (root != null && cgroupPath != null) { 45 if (root.equals("/")) { 46 if (!cgroupPath.equals("/")) { 47 path = mountPoint + cgroupPath; 48 } 49 else { 50 path = mountPoint; 51 } 52 } 53 else { 54 if (root.equals(cgroupPath)) { 55 path = mountPoint; 56 } 57 else { 58 if (cgroupPath.startsWith(root)) { 59 if (cgroupPath.length() > root.length()) { 60 String cgroupSubstr = cgroupPath.substring(root.length()); 61 path = mountPoint + cgroupSubstr; 62 } 63 } 64 } 65 } 66 } 67 } 68 69 @Override 70 public String path() { 71 return path; 72 } 73 74 public static long convertStringToLong(String strval) { 75 return CgroupSubsystemController.convertStringToLong(strval, Long.MAX_VALUE); 76 } 77 78 public static long longValOrUnlimited(long value) { 79 return value > UNLIMITED_MIN ? CgroupSubsystemController.RETVAL_UNLIMITED : value; 80 } 81 }