1 /*

     2  * Copyright (c) 2003, 2013, 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 sun.management;

    27 

    28 import com.sun.management.OperatingSystemMXBean;

    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 OperatingSystemImpl extends BaseOperatingSystemImpl

    38     implements OperatingSystemMXBean {

    39 

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

    41     // PSAPI DLL.

    42     private static Object psapiLock = new Object();

    43 

    44     OperatingSystemImpl(VMManagement vm) {

    45         super(vm);

    46     }

    47 

    48     public long getCommittedVirtualMemorySize() {

    49         synchronized (psapiLock) {

    50             return getCommittedVirtualMemorySize0();

    51         }

    52     }

    53 

    54     public long getTotalSwapSpaceSize() {

    55         return getTotalSwapSpaceSize0();

    56     }

    57 

    58     public long getFreeSwapSpaceSize() {

    59         return getFreeSwapSpaceSize0();

    60     }

    61 

    62     public long getProcessCpuTime() {

    63         return getProcessCpuTime0();

    64     }

    65 

    66     public long getFreePhysicalMemorySize() {

    67         return getFreePhysicalMemorySize0();

    68     }

    69 

    70     public long getTotalPhysicalMemorySize() {

    71         return getTotalPhysicalMemorySize0();

    72     }

    73 

    74     public double getSystemCpuLoad() {

    75         return getSystemCpuLoad0();

    76     }

    77 

    78     public double getProcessCpuLoad() {

    79         return getProcessCpuLoad0();

    80     }

    81 

    82     /* native methods */

    83     private native long getCommittedVirtualMemorySize0();

    84     private native long getFreePhysicalMemorySize0();

    85     private native long getFreeSwapSpaceSize0();

    86     private native double getProcessCpuLoad0();

    87     private native long getProcessCpuTime0();

    88     private native double getSystemCpuLoad0();

    89     private native long getTotalPhysicalMemorySize0();

    90     private native long getTotalSwapSpaceSize0();

    91 

    92     static {

    93         initialize0();

    94     }

    95 

    96     private static native void initialize0();

    97 }