/*
* Copyright (c) 2009, 2011, 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.
*
* 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 com.sun.max.memory;
import com.sun.max.unsafe.*;
import com.sun.max.vm.runtime.*;
/**
* Immortal memory region can be used to allocate objects at runtime that are not collected by the GC.
*/
public class ImmortalMemoryRegion extends LinearAllocationMemoryRegion {
public ImmortalMemoryRegion(String name) {
super(name);
}
public void initialize(Size size) {
Pointer region = VirtualMemory.allocate(size, VirtualMemory.Type.HEAP);
if (region.equals(Pointer.zero())) {
FatalError.unexpected("Initialization of immortal memory region failed");
}
this.size = size;
this.start = region;
this.mark.set(region);
}
public void initialize(MemoryRegion memoryRegion) {
setStart(memoryRegion.start());
setSize(memoryRegion.size());
mark.set(memoryRegion.start());
}
}