| /* |
| * 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.memory; |
| |
| /** |
| * Code ported from Apache Spark {org.apache.spark.unsafe.memory} package |
| * A simple {@link MemoryAllocator} that uses {@code Unsafe} to allocate off-heap memory. |
| */ |
| public class UnsafeMemoryAllocator implements MemoryAllocator { |
| |
| @Override |
| public MemoryBlock allocate(long size) throws OutOfMemoryError { |
| long address = CarbonUnsafe.getUnsafe().allocateMemory(size); |
| // initializing memory with zero |
| CarbonUnsafe.getUnsafe().setMemory(null, address, size, (byte) 0); |
| return new MemoryBlock(null, address, size, MemoryType.OFFHEAP); |
| } |
| |
| @Override |
| public void free(MemoryBlock memory) { |
| assert (memory.obj == null) : |
| "baseObject not null; are you trying to use the off-heap allocator to free on-heap memory?"; |
| CarbonUnsafe.getUnsafe().freeMemory(memory.offset); |
| memory.setFreedStatus(true); |
| } |
| } |