1 /*

     2  * Copyright (c) 2003, 2015, 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.internal;

    27 

    28 import com.sun.management.OperatingSystemMXBean;

    29 import sun.management.BaseOperatingSystemImpl;

    30 import sun.management.VMManagement;

    31 

    32 /**

    33  * Implementation class for the operating system.

    34  * Standard and committed hotspot-specific metrics if any.

    35  *

    36  * ManagementFactory.getOperatingSystemMXBean() returns an instance

    37  * of this class.

    38  */

    39 class OperatingSystemImpl extends BaseOperatingSystemImpl

    40     implements OperatingSystemMXBean {

    41 

    42     // psapiLock is a lock to make sure only one thread loading

    43     // PSAPI DLL.

    44     private static Object psapiLock = new Object();

    45 

    46     OperatingSystemImpl(VMManagement vm) {

    47         super(vm);

    48     }

    49 

    50     @Override

    51     public long getCommittedVirtualMemorySize() {

    52         synchronized (psapiLock) {

    53             return getCommittedVirtualMemorySize0();

    54         }

    55     }

    56 

    57     @Override

    58     public long getTotalSwapSpaceSize() {

    59         return getTotalSwapSpaceSize0();

    60     }

    61 

    62     @Override

    63     public long getFreeSwapSpaceSize() {

    64         return getFreeSwapSpaceSize0();

    65     }

    66 

    67     @Override

    68     public long getProcessCpuTime() {

    69         return getProcessCpuTime0();

    70     }

    71 

    72     @Override

    73     public long getFreePhysicalMemorySize() {

    74         return getFreePhysicalMemorySize0();

    75     }

    76 

    77     @Override

    78     public long getTotalPhysicalMemorySize() {

    79         return getTotalPhysicalMemorySize0();

    80     }

    81 

    82     @Override

    83     public double getSystemCpuLoad() {

    84         return getSystemCpuLoad0();

    85     }

    86 

    87     @Override

    88     public double getProcessCpuLoad() {

    89         return getProcessCpuLoad0();

    90     }

    91 

    92     /* native methods */

    93     private native long getCommittedVirtualMemorySize0();

    94     private native long getFreePhysicalMemorySize0();

    95     private native long getFreeSwapSpaceSize0();

    96     private native double getProcessCpuLoad0();

    97     private native long getProcessCpuTime0();

    98     private native double getSystemCpuLoad0();

    99     private native long getTotalPhysicalMemorySize0();

   100     private native long getTotalSwapSpaceSize0();

   101 

   102     static {

   103         initialize0();

   104     }

   105 

   106     private static native void initialize0();

   107 }