1 /*
   2  * Copyright (c) 2003, 2011, 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 com.sun.management;
  27 
  28 import sun.management.VMManagement;
  29 
  30 /**
  31  * Implementation class for the operating system.
  32  * Standard and committed hotspot-specific metrics if any.
  33  *
  34  * ManagementFactory.getOperatingSystemMXBean() returns an instance
  35  * of this class.
  36  */
  37 class OperatingSystem
  38     extends    sun.management.OperatingSystemImpl
  39     implements OperatingSystemMXBean {
  40 
  41     // psapiLock is a lock to make sure only one thread loading
  42     // PSAPI DLL.
  43     private static Object psapiLock = new Object();
  44 
  45     OperatingSystem(VMManagement vm) {
  46         super(vm);
  47     }
  48 
  49     public long getCommittedVirtualMemorySize() {
  50         synchronized (psapiLock) {
  51             return getCommittedVirtualMemorySize0();
  52         }
  53     }
  54     private native long getCommittedVirtualMemorySize0();
  55 
  56     public native long getTotalSwapSpaceSize();
  57     public native long getFreeSwapSpaceSize();
  58     public native long getProcessCpuTime();
  59     public native long getFreePhysicalMemorySize();
  60     public native long getTotalPhysicalMemorySize();
  61     public native double getSystemCpuLoad();
  62     public native double getProcessCpuLoad();
  63 
  64     static {
  65         initialize();
  66     }
  67     private static native void initialize();
  68 }