| /* |
| * 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.carbondata.core.datastore.page; |
| |
| import org.apache.carbondata.core.datastore.page.encoding.ColumnPageEncoderMeta; |
| import org.apache.carbondata.core.memory.CarbonUnsafe; |
| import org.apache.carbondata.core.memory.MemoryBlock; |
| import org.apache.carbondata.core.memory.UnsafeMemoryManager; |
| |
| public abstract class UnsafeVarLengthColumnPageBase extends VarLengthColumnPageBase { |
| |
| // memory allocated by Unsafe |
| protected MemoryBlock memoryBlock; |
| |
| // base address of memoryBlock |
| protected Object baseAddress; |
| |
| // base offset of memoryBlock |
| protected long baseOffset; |
| |
| // size of the allocated memory, in bytes |
| protected int capacity; |
| |
| UnsafeVarLengthColumnPageBase(ColumnPageEncoderMeta columnPageEncoderMeta, int pageSize) { |
| super(columnPageEncoderMeta, pageSize); |
| } |
| |
| /** |
| * reallocate memory if capacity length than current size + request size |
| */ |
| protected void ensureMemory(int requestSize) { |
| if (totalLength + requestSize > capacity) { |
| int newSize = Math.max(2 * capacity, totalLength + requestSize); |
| MemoryBlock newBlock = UnsafeMemoryManager.allocateMemoryWithRetry(taskId, newSize); |
| CarbonUnsafe.getUnsafe().copyMemory(baseAddress, baseOffset, |
| newBlock.getBaseObject(), newBlock.getBaseOffset(), capacity); |
| UnsafeMemoryManager.INSTANCE.freeMemory(taskId, memoryBlock); |
| memoryBlock = newBlock; |
| baseAddress = newBlock.getBaseObject(); |
| baseOffset = newBlock.getBaseOffset(); |
| capacity = newSize; |
| } |
| } |
| |
| } |