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1   /*
2    * Copyright 2016 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.buffer;
17  
18  import io.netty.util.internal.PlatformDependent;
19  
20  import java.nio.ByteBuffer;
21  
22  class UnpooledUnsafeNoCleanerDirectByteBuf extends UnpooledUnsafeDirectByteBuf {
23  
24      UnpooledUnsafeNoCleanerDirectByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
25          super(alloc, initialCapacity, maxCapacity);
26      }
27  
28      @Override
29      protected ByteBuffer allocateDirect(int initialCapacity) {
30          return PlatformDependent.allocateDirectNoCleaner(initialCapacity);
31      }
32  
33      ByteBuffer reallocateDirect(ByteBuffer oldBuffer, int initialCapacity) {
34          return PlatformDependent.reallocateDirectNoCleaner(oldBuffer, initialCapacity);
35      }
36  
37      @Override
38      protected void freeDirect(ByteBuffer buffer) {
39          PlatformDependent.freeDirectNoCleaner(buffer);
40      }
41  
42      @Override
43      public ByteBuf capacity(int newCapacity) {
44          checkNewCapacity(newCapacity);
45  
46          int oldCapacity = capacity();
47          if (newCapacity == oldCapacity) {
48              return this;
49          }
50  
51          ByteBuffer newBuffer = reallocateDirect(buffer, newCapacity);
52  
53          if (newCapacity < oldCapacity) {
54              if (readerIndex() < newCapacity) {
55                  if (writerIndex() > newCapacity) {
56                      writerIndex(newCapacity);
57                  }
58              } else {
59                  setIndex(newCapacity, newCapacity);
60              }
61          }
62          setByteBuffer(newBuffer, false);
63          return this;
64      }
65  }