| /*** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.tajo.util; |
| |
| import com.google.common.base.Preconditions; |
| import sun.misc.Cleaner; |
| import sun.misc.Unsafe; |
| import sun.nio.ch.DirectBuffer; |
| |
| import java.lang.reflect.Field; |
| import java.nio.ByteBuffer; |
| |
| public class UnsafeUtil { |
| public static final Unsafe unsafe; |
| |
| // offsets |
| public static final int ARRAY_BOOLEAN_BASE_OFFSET; |
| public static final int ARRAY_BYTE_BASE_OFFSET; |
| public static final int ARRAY_SHORT_BASE_OFFSET; |
| public static final int ARRAY_CHAR_BASE_OFFSET; |
| public static final int ARRAY_INT_BASE_OFFSET; |
| public static final int ARRAY_LONG_BASE_OFFSET; |
| public static final int ARRAY_FLOAT_BASE_OFFSET; |
| public static final int ARRAY_DOUBLE_BASE_OFFSET; |
| public static final int ARRAY_OBJECT_BASE_OFFSET; |
| |
| // scale |
| public static final int ARRAY_BOOLEAN_INDEX_SCALE; |
| public static final int ARRAY_BYTE_INDEX_SCALE; |
| public static final int ARRAY_SHORT_INDEX_SCALE; |
| public static final int ARRAY_CHAR_INDEX_SCALE; |
| public static final int ARRAY_INT_INDEX_SCALE; |
| public static final int ARRAY_LONG_INDEX_SCALE; |
| public static final int ARRAY_FLOAT_INDEX_SCALE; |
| public static final int ARRAY_DOUBLE_INDEX_SCALE; |
| public static final int ARRAY_OBJECT_INDEX_SCALE; |
| |
| static { |
| Field field; |
| try { |
| field = Unsafe.class.getDeclaredField("theUnsafe"); |
| |
| field.setAccessible(true); |
| unsafe = (Unsafe) field.get(null); |
| if (unsafe == null) { |
| throw new RuntimeException("Unsafe access not available"); |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| ARRAY_BOOLEAN_BASE_OFFSET = unsafe.arrayBaseOffset(boolean[].class); |
| ARRAY_BYTE_BASE_OFFSET = unsafe.arrayBaseOffset(byte[].class); |
| ARRAY_SHORT_BASE_OFFSET = unsafe.arrayBaseOffset(short[].class); |
| ARRAY_CHAR_BASE_OFFSET = unsafe.arrayBaseOffset(char[].class); |
| ARRAY_INT_BASE_OFFSET = unsafe.arrayBaseOffset(int[].class); |
| ARRAY_LONG_BASE_OFFSET = unsafe.arrayBaseOffset(long[].class); |
| ARRAY_FLOAT_BASE_OFFSET = unsafe.arrayBaseOffset(float[].class); |
| ARRAY_DOUBLE_BASE_OFFSET = unsafe.arrayBaseOffset(double[].class); |
| ARRAY_OBJECT_BASE_OFFSET = unsafe.arrayBaseOffset(Object[].class); |
| |
| ARRAY_BOOLEAN_INDEX_SCALE = unsafe.arrayIndexScale(boolean[].class); |
| ARRAY_BYTE_INDEX_SCALE = unsafe.arrayIndexScale(byte[].class); |
| ARRAY_SHORT_INDEX_SCALE = unsafe.arrayIndexScale(short[].class); |
| ARRAY_CHAR_INDEX_SCALE = unsafe.arrayIndexScale(char[].class); |
| ARRAY_INT_INDEX_SCALE = unsafe.arrayIndexScale(int[].class); |
| ARRAY_LONG_INDEX_SCALE = unsafe.arrayIndexScale(long[].class); |
| ARRAY_FLOAT_INDEX_SCALE = unsafe.arrayIndexScale(float[].class); |
| ARRAY_DOUBLE_INDEX_SCALE = unsafe.arrayIndexScale(double[].class); |
| ARRAY_OBJECT_INDEX_SCALE = unsafe.arrayIndexScale(Object[].class); |
| } |
| |
| public static int alignedSize(int size) { |
| int remain = size % SizeOf.BYTES_PER_WORD; |
| if (remain > 0) { |
| return size + (SizeOf.BYTES_PER_WORD - remain); |
| } else { |
| return size; |
| } |
| } |
| |
| public static long getAddress(ByteBuffer buffer) { |
| Preconditions.checkArgument(buffer.isDirect(), "ByteBuffer must be DirectBuffer"); |
| return ((DirectBuffer)buffer).address(); |
| } |
| |
| public static void free(Deallocatable obj) { |
| obj.release(); |
| } |
| |
| public static void free(ByteBuffer bb) { |
| Preconditions.checkNotNull(bb); |
| Preconditions.checkState(bb.isDirect()); |
| |
| Cleaner cleaner = ((DirectBuffer) bb).cleaner(); |
| if (cleaner != null) { |
| cleaner.clean(); |
| } |
| } |
| } |