author | lbourges |
Wed, 23 Mar 2016 21:20:25 +0100 | |
changeset 36902 | bb30d89aa00e |
parent 35688 | 744b6cf60397 |
child 39519 | 21bfc4452441 |
permissions | -rw-r--r-- |
34417 | 1 |
/* |
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* Copyright (c) 2007, 2016, 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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package sun.java2d.marlin; |
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import static sun.java2d.marlin.MarlinConst.logUnsafeMalloc; |
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import jdk.internal.misc.Unsafe; |
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import jdk.internal.ref.CleanerFactory; |
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/** |
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* |
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* @author bourgesl |
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*/ |
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final class OffHeapArray { |
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// unsafe reference |
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static final Unsafe unsafe; |
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// size of int / float |
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static final int SIZE_INT; |
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static { |
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unsafe = Unsafe.getUnsafe(); |
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SIZE_INT = Unsafe.ARRAY_INT_INDEX_SCALE; |
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} |
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/* members */ |
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long address; |
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long length; |
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int used; |
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OffHeapArray(final Object parent, final long len) { |
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// note: may throw OOME: |
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this.address = unsafe.allocateMemory(len); |
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this.length = len; |
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this.used = 0; |
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if (logUnsafeMalloc) { |
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MarlinUtils.logInfo(System.currentTimeMillis() |
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+ ": OffHeapArray.allocateMemory = " |
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+ len + " to addr = " + this.address); |
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} |
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parents:
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diff
changeset
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// Register a cleaning function to ensure freeing off-heap memory: |
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CleanerFactory.cleaner().register(parent, () -> this.free()); |
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} |
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/* |
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* As realloc may change the address, updating address is MANDATORY |
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* @param len new array length |
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* @throws OutOfMemoryError if the allocation is refused by the system |
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*/ |
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void resize(final long len) { |
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// note: may throw OOME: |
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this.address = unsafe.reallocateMemory(address, len); |
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this.length = len; |
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if (logUnsafeMalloc) { |
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MarlinUtils.logInfo(System.currentTimeMillis() |
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+ ": OffHeapArray.reallocateMemory = " |
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+ len + " to addr = " + this.address); |
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} |
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} |
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void free() { |
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unsafe.freeMemory(this.address); |
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if (logUnsafeMalloc) { |
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MarlinUtils.logInfo(System.currentTimeMillis() |
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+ ": OffHeapArray.freeMemory = " |
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+ this.length |
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+ " at addr = " + this.address); |
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} |
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} |
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void fill(final byte val) { |
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unsafe.setMemory(this.address, this.length, val); |
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} |
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} |