/*

 * 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.

 *

 * 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

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package sun.jvm.hotspot.gc.z;

import sun.jvm.hotspot.debugger.Address;

import sun.jvm.hotspot.runtime.VM;

import sun.jvm.hotspot.runtime.VMObject;

import sun.jvm.hotspot.runtime.VMObjectFactory;

import sun.jvm.hotspot.types.AddressField;

import sun.jvm.hotspot.types.CIntegerField;

import sun.jvm.hotspot.types.Type;

import sun.jvm.hotspot.types.TypeDataBase;

// Mirror class for ZPageAllocator

public class ZPageAllocator extends VMObject {

    private static CIntegerField usedField;

    static {

        VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));

    }

    static private synchronized void initialize(TypeDataBase db) {

        Type type = db.lookupType("ZPageAllocator");

        usedField = type.getCIntegerField("_used");

    }

    private ZPhysicalMemoryManager physical() {

      return (ZPhysicalMemoryManager)VMObjectFactory.newObject(ZPhysicalMemoryManager.class, physicalAddr);

    }

    public long maxCapacity() {

        return physical().maxCapacity();

    }

    public long capacity() {

        return physical().capacity();

    }

    public long used() {

        return usedField.getValue(addr);

    }

    public ZPageAllocator(Address addr) {

        super(addr);

    }

}