/*

 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.management;

import java.lang.management.OperatingSystemMXBean;

import java.lang.management.ManagementFactory;

import javax.management.ObjectName;

import sun.misc.Unsafe;

/**

 * Implementation class for the operating system.

 * Standard and committed hotspot-specific metrics if any.

 *

 * ManagementFactory.getOperatingSystemMXBean() returns an instance

 * of this class.

 */

public class BaseOperatingSystemImpl implements OperatingSystemMXBean {

    private final VMManagement jvm;

    /**

     * Constructor of BaseOperatingSystemImpl class.

     */

    protected BaseOperatingSystemImpl(VMManagement vm) {

        this.jvm = vm;

    }

    public String getName() {

        return jvm.getOsName();

    }

    public String getArch() {

        return jvm.getOsArch();

    }

    public String getVersion() {

        return jvm.getOsVersion();

    }

    public int getAvailableProcessors() {

        return jvm.getAvailableProcessors();

    }

    private static final Unsafe unsafe = Unsafe.getUnsafe();

    private double[] loadavg = new double[1];

    public double getSystemLoadAverage() {

        if (unsafe.getLoadAverage(loadavg, 1) == 1) {

             return loadavg[0];

        } else {

             return -1.0;

        }

    }

    public ObjectName getObjectName() {

        return Util.newObjectName(ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME);

    }

}