1 /* 2 * Copyright (c) 2020, Red Hat Inc. 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; 27 28 /** 29 * Data structure to hold info from /proc/self/cgroup 30 * 31 * man 7 cgroups 32 * 33 * @see CgroupSubsystemFactory 34 */ 35 class CgroupInfo { 36 37 private final String name; 38 private final int hierarchyId; 39 private final boolean enabled; 40 41 private CgroupInfo(String name, int hierarchyId, boolean enabled) { 42 this.name = name; 43 this.hierarchyId = hierarchyId; 44 this.enabled = enabled; 45 } 46 47 String getName() { 48 return name; 49 } 50 51 int getHierarchyId() { 52 return hierarchyId; 53 } 54 55 boolean isEnabled() { 56 return enabled; 57 } 58 59 static CgroupInfo fromCgroupsLine(String line) { 60 String[] tokens = line.split("\\s+"); 61 if (tokens.length != 4) { 62 return null; 63 } 64 // discard 3'rd field, num_cgroups 65 return new CgroupInfo(tokens[0] /* name */, 66 Integer.parseInt(tokens[1]) /* hierarchyId */, 67 (Integer.parseInt(tokens[3]) == 1) /* enabled */); 68 } 69 70 }