Lucene.Net  3.0.3
Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users.
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Properties Pages
CharBlockPool.cs
Go to the documentation of this file.
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 using System;
19 
20 namespace Lucene.Net.Index
21 {
22 
23  sealed class CharBlockPool
24  {
25  private void InitBlock()
26  {
27  charUpto = DocumentsWriter.CHAR_BLOCK_SIZE;
28  }
29 
30  public char[][] buffers = new char[10][];
31  internal int numBuffer;
32 
33  internal int bufferUpto = - 1; // Which buffer we are upto
34  public int charUpto; // Where we are in head buffer
35 
36  public char[] buffer; // Current head buffer
37  public int charOffset = - DocumentsWriter.CHAR_BLOCK_SIZE; // Current head offset
38  private readonly DocumentsWriter docWriter;
39 
40  public CharBlockPool(DocumentsWriter docWriter)
41  {
42  InitBlock();
43  this.docWriter = docWriter;
44  }
45 
46  public void Reset()
47  {
48  docWriter.RecycleCharBlocks(buffers, 1 + bufferUpto);
49  bufferUpto = - 1;
50  charUpto = DocumentsWriter.CHAR_BLOCK_SIZE;
51  charOffset = - DocumentsWriter.CHAR_BLOCK_SIZE;
52  }
53 
54  public void NextBuffer()
55  {
56  if (1 + bufferUpto == buffers.Length)
57  {
58  var newBuffers = new char[(int) (buffers.Length * 1.5)][];
59  Array.Copy(buffers, 0, newBuffers, 0, buffers.Length);
60  buffers = newBuffers;
61  }
62  buffer = buffers[1 + bufferUpto] = docWriter.GetCharBlock();
63  bufferUpto++;
64 
65  charUpto = 0;
66  charOffset += DocumentsWriter.CHAR_BLOCK_SIZE;
67  }
68  }
69 }