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1 | /* |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | ||
18 | package org.apache.arrow.memory; | |
19 | ||
20 | import org.apache.arrow.memory.util.MemoryUtil; | |
21 | ||
22 | /** | |
23 | * The default Allocation Manager Factory for a module. | |
24 | * | |
25 | * This is only used by tests and contains only a simplistic allocator method. | |
26 | * | |
27 | */ | |
28 | public class DefaultAllocationManagerFactory implements AllocationManager.Factory { | |
29 | ||
30 | public static final AllocationManager.Factory FACTORY = new DefaultAllocationManagerFactory(); | |
31 | private static final ArrowBuf EMPTY = new ArrowBuf(ReferenceManager.NO_OP, | |
32 | null, | |
33 | 0, | |
34 | MemoryUtil.UNSAFE.allocateMemory(0)); | |
35 | ||
36 | @Override | |
37 | public AllocationManager create(BufferAllocator accountingAllocator, long size) { | |
38 | return new AllocationManager(accountingAllocator) { | |
39 | private final long allocatedSize = size; | |
40 | private final long address = MemoryUtil.UNSAFE.allocateMemory(size); | |
41 | ||
42 | @Override | |
43 | public long getSize() { | |
44 | return allocatedSize; | |
45 | } | |
46 | ||
47 | @Override | |
48 | protected long memoryAddress() { | |
49 | return address; | |
50 | } | |
51 | ||
52 | @Override | |
53 | protected void release0() { | |
54 | MemoryUtil.UNSAFE.freeMemory(address); | |
55 | } | |
56 | }; | |
57 | } | |
58 | ||
59 | @Override | |
60 | public ArrowBuf empty() { | |
61 | return EMPTY; | |
62 | } | |
63 | } |