src/java.base/share/classes/sun/nio/ch/AllocatedNativeObject.java
author alanb
Sat, 30 Nov 2019 16:21:19 +0000
changeset 59329 289000934908
parent 47216 71c04702a3d5
permissions -rw-r--r--
8234805: (dc) Remove JNI upcall from DatagramChannel.receive implementation Reviewed-by: dfuchs, chegar
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/*
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 * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 */
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package sun.nio.ch;                                     // Formerly in sun.misc
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// ## In the fullness of time, this class will be eliminated
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class AllocatedNativeObject                             // package-private
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    extends NativeObject
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{
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    /**
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     * Allocates a memory area of at least {@code size} bytes outside of the
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     * Java heap and creates a native object for that area.
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     *
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     * @param  size
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     *         Number of bytes to allocate
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     *
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     * @param  pageAligned
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     *         If {@code true} then the area will be aligned on a hardware
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     *         page boundary
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     *
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     * @throws OutOfMemoryError
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     *         If the request cannot be satisfied
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     */
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    AllocatedNativeObject(int size, boolean pageAligned) {
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        super(size, pageAligned);
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    }
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    /**
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     * Frees the native memory area associated with this object.
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     */
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    synchronized void free() {
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        if (allocationAddress != 0) {
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            unsafe.freeMemory(allocationAddress);
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            allocationAddress = 0;
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        }
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    }
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}