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1   /*
2    * Copyright 2012 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  /**
21   * Simplistic {@link ByteBufAllocator} implementation that does not pool anything.
22   */
23  public final class UnpooledByteBufAllocator extends AbstractByteBufAllocator {
24  
25      /**
26       * Default instance
27       */
28      public static final UnpooledByteBufAllocator DEFAULT =
29              new UnpooledByteBufAllocator(PlatformDependent.directBufferPreferred());
30  
31      /**
32       * Create a new instance
33       *
34       * @param preferDirect {@code true} if {@link #buffer(int)} should try to allocate a direct buffer rather than
35       *                     a heap buffer
36       */
37      public UnpooledByteBufAllocator(boolean preferDirect) {
38          super(preferDirect);
39      }
40  
41      @Override
42      protected ByteBuf newHeapBuffer(int initialCapacity, int maxCapacity) {
43          return new UnpooledHeapByteBuf(this, initialCapacity, maxCapacity);
44      }
45  
46      @Override
47      protected ByteBuf newDirectBuffer(int initialCapacity, int maxCapacity) {
48          ByteBuf buf;
49          if (PlatformDependent.hasUnsafe()) {
50              buf = new UnpooledUnsafeDirectByteBuf(this, initialCapacity, maxCapacity);
51          } else {
52              buf = new UnpooledDirectByteBuf(this, initialCapacity, maxCapacity);
53          }
54  
55          return toLeakAwareBuffer(buf);
56      }
57  
58      @Override
59      public boolean isDirectBufferPooled() {
60          return false;
61      }
62  }