jdk/src/share/classes/sun/nio/ch/AllocatedNativeObject.java

/*
 * Copyright 2000-2001 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 */

package sun.nio.ch;                                     // Formerly in sun.misc


// ## In the fullness of time, this class will be eliminated

class AllocatedNativeObject                             // package-private
    extends NativeObject
{

    /**
     * Allocates a memory area of at least <tt>size</tt> bytes outside of the
     * Java heap and creates a native object for that area.
     *
     * @param  size
     *         Number of bytes to allocate
     *
     * @param  pageAligned
     *         If <tt>true</tt> then the area will be aligned on a hardware
     *         page boundary
     *
     * @throws OutOfMemoryError
     *         If the request cannot be satisfied
     */
    AllocatedNativeObject(int size, boolean pageAligned) {
        super(size, pageAligned);
    }

    /**
     * Frees the native memory area associated with this object.
     */
    synchronized void free() {
        if (allocationAddress != 0) {
            unsafe.freeMemory(allocationAddress);
            allocationAddress = 0;
        }
    }

}