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1   /*
2    * Copyright 2015 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    *   https://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.ObjectPool;
19  import io.netty.util.internal.ObjectPool.Handle;
20  import io.netty.util.internal.ObjectPool.ObjectCreator;
21  import io.netty.util.internal.PlatformDependent;
22  
23  final class PooledUnsafeHeapByteBuf extends PooledHeapByteBuf {
24  
25      private static final ObjectPool<PooledUnsafeHeapByteBuf> RECYCLER = ObjectPool.newPool(
26              new ObjectCreator<PooledUnsafeHeapByteBuf>() {
27          @Override
28          public PooledUnsafeHeapByteBuf newObject(Handle<PooledUnsafeHeapByteBuf> handle) {
29              return new PooledUnsafeHeapByteBuf(handle, 0);
30          }
31      });
32  
33      static PooledUnsafeHeapByteBuf newUnsafeInstance(int maxCapacity) {
34          PooledUnsafeHeapByteBuf buf = RECYCLER.get();
35          buf.reuse(maxCapacity);
36          return buf;
37      }
38  
39      private PooledUnsafeHeapByteBuf(Handle<PooledUnsafeHeapByteBuf> recyclerHandle, int maxCapacity) {
40          super(recyclerHandle, maxCapacity);
41      }
42  
43      @Override
44      protected byte _getByte(int index) {
45          return UnsafeByteBufUtil.getByte(memory, idx(index));
46      }
47  
48      @Override
49      protected short _getShort(int index) {
50          return UnsafeByteBufUtil.getShort(memory, idx(index));
51      }
52  
53      @Override
54      protected short _getShortLE(int index) {
55          return UnsafeByteBufUtil.getShortLE(memory, idx(index));
56      }
57  
58      @Override
59      protected int _getUnsignedMedium(int index) {
60          return UnsafeByteBufUtil.getUnsignedMedium(memory, idx(index));
61      }
62  
63      @Override
64      protected int _getUnsignedMediumLE(int index) {
65          return UnsafeByteBufUtil.getUnsignedMediumLE(memory, idx(index));
66      }
67  
68      @Override
69      protected int _getInt(int index) {
70          return UnsafeByteBufUtil.getInt(memory, idx(index));
71      }
72  
73      @Override
74      protected int _getIntLE(int index) {
75          return UnsafeByteBufUtil.getIntLE(memory, idx(index));
76      }
77  
78      @Override
79      protected long _getLong(int index) {
80          return UnsafeByteBufUtil.getLong(memory, idx(index));
81      }
82  
83      @Override
84      protected long _getLongLE(int index) {
85          return UnsafeByteBufUtil.getLongLE(memory, idx(index));
86      }
87  
88      @Override
89      protected void _setByte(int index, int value) {
90          UnsafeByteBufUtil.setByte(memory, idx(index), value);
91      }
92  
93      @Override
94      protected void _setShort(int index, int value) {
95          UnsafeByteBufUtil.setShort(memory, idx(index), value);
96      }
97  
98      @Override
99      protected void _setShortLE(int index, int value) {
100         UnsafeByteBufUtil.setShortLE(memory, idx(index), value);
101     }
102 
103     @Override
104     protected void _setMedium(int index, int value) {
105         UnsafeByteBufUtil.setMedium(memory, idx(index), value);
106     }
107 
108     @Override
109     protected void _setMediumLE(int index, int value) {
110         UnsafeByteBufUtil.setMediumLE(memory, idx(index), value);
111     }
112 
113     @Override
114     protected void _setInt(int index, int value) {
115         UnsafeByteBufUtil.setInt(memory, idx(index), value);
116     }
117 
118     @Override
119     protected void _setIntLE(int index, int value) {
120         UnsafeByteBufUtil.setIntLE(memory, idx(index), value);
121     }
122 
123     @Override
124     protected void _setLong(int index, long value) {
125         UnsafeByteBufUtil.setLong(memory, idx(index), value);
126     }
127 
128     @Override
129     protected void _setLongLE(int index, long value) {
130         UnsafeByteBufUtil.setLongLE(memory, idx(index), value);
131     }
132 
133     @Override
134     public ByteBuf setZero(int index, int length) {
135         if (PlatformDependent.javaVersion() >= 7) {
136             checkIndex(index, length);
137             // Only do on java7+ as the needed Unsafe call was only added there.
138             UnsafeByteBufUtil.setZero(memory, idx(index), length);
139             return this;
140         }
141         return super.setZero(index, length);
142     }
143 
144     @Override
145     public ByteBuf writeZero(int length) {
146         if (PlatformDependent.javaVersion() >= 7) {
147             // Only do on java7+ as the needed Unsafe call was only added there.
148             ensureWritable(length);
149             int wIndex = writerIndex;
150             UnsafeByteBufUtil.setZero(memory, idx(wIndex), length);
151             writerIndex = wIndex + length;
152             return this;
153         }
154         return super.writeZero(length);
155     }
156 
157     @Override
158     @Deprecated
159     protected SwappedByteBuf newSwappedByteBuf() {
160         if (PlatformDependent.isUnaligned()) {
161             // Only use if unaligned access is supported otherwise there is no gain.
162             return new UnsafeHeapSwappedByteBuf(this);
163         }
164         return super.newSwappedByteBuf();
165     }
166 }