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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> *<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> */<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>package org.apache.mina.core.buffer;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.nio.ByteBuffer;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.nio.ByteOrder;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.HashMap;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Map;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Queue;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.concurrent.ConcurrentLinkedQueue;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>/**<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * An {@link IoBufferAllocator} that caches the buffers which are likely to<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * be reused during auto-expansion of the buffers.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * <p><a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * In {@link SimpleBufferAllocator}, the underlying {@link ByteBuffer} of<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * the {@link IoBuffer} is reallocated on its capacity change, which means<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * the newly allocated bigger {@link ByteBuffer} replaces the old small<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * {@link ByteBuffer}. Consequently, the old {@link ByteBuffer} is marked<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * for garbage collection.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * <p><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * It's not a problem in most cases as long as the capacity change doesn't<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * happen frequently. However, once it happens too often, it burdens the<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * VM and the cost of filling the newly allocated {@link ByteBuffer} with<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * {@code NUL} surpass the cost of accessing the cache. In 2 dual-core<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Opteron Italy 270 processors, {@link CachedBufferAllocator} outperformed<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * {@link SimpleBufferAllocator} in the following situation:<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * <ul><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * <li>when a 32 bytes buffer is expanded 4 or more times,</li> <a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * <li>when a 64 bytes buffer is expanded 4 or more times,</li><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * <li>when a 128 bytes buffer is expanded 2 or more times,</li><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * <li>and when a 256 bytes or bigger buffer is expanded 1 or more times.</li><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * </ul><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * Please note the observation above is subject to change in a different<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * environment.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * <p><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * {@link CachedBufferAllocator} uses {@link ThreadLocal} to store the cached<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * buffer, allocates buffers whose capacity is power of 2 only and provides<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * performance advantage if {@link IoBuffer#free()} is called properly.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> *<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> */<a name="line.59"></a> |
| <span class="sourceLineNo">060</span>public class CachedBufferAllocator implements IoBufferAllocator {<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> private static final int DEFAULT_MAX_POOL_SIZE = 8;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> private static final int DEFAULT_MAX_CACHED_BUFFER_SIZE = 1 << 18; // 256KB<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private final int maxPoolSize;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private final int maxCachedBufferSize;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> private final ThreadLocal<Map<Integer, Queue<CachedBuffer>>> heapBuffers;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span><a name="line.71"></a> |
| <span class="sourceLineNo">072</span> private final ThreadLocal<Map<Integer, Queue<CachedBuffer>>> directBuffers;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> /**<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * Creates a new instance with the default parameters<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * ({@literal #DEFAULT_MAX_POOL_SIZE} and {@literal #DEFAULT_MAX_CACHED_BUFFER_SIZE}). <a name="line.76"></a> |
| <span class="sourceLineNo">077</span> */<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> public CachedBufferAllocator() {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> this(DEFAULT_MAX_POOL_SIZE, DEFAULT_MAX_CACHED_BUFFER_SIZE);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> /**<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * Creates a new instance.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> * <a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * @param maxPoolSize the maximum number of buffers with the same capacity per thread.<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * <tt>0</tt> disables this limitation.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> * @param maxCachedBufferSize the maximum capacity of a cached buffer.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * A buffer whose capacity is bigger than this value is<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * not pooled. <tt>0</tt> disables this limitation.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> */<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> public CachedBufferAllocator(int maxPoolSize, int maxCachedBufferSize) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (maxPoolSize < 0) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> throw new IllegalArgumentException("maxPoolSize: " + maxPoolSize);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span><a name="line.95"></a> |
| <span class="sourceLineNo">096</span> if (maxCachedBufferSize < 0) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> throw new IllegalArgumentException("maxCachedBufferSize: " + maxCachedBufferSize);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> this.maxPoolSize = maxPoolSize;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> this.maxCachedBufferSize = maxCachedBufferSize;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span><a name="line.102"></a> |
| <span class="sourceLineNo">103</span> this.heapBuffers = new ThreadLocal<Map<Integer, Queue<CachedBuffer>>>() {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> @Override<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> protected Map<Integer, Queue<CachedBuffer>> initialValue() {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> return newPoolMap();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> }<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> };<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> this.directBuffers = new ThreadLocal<Map<Integer, Queue<CachedBuffer>>>() {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> @Override<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> protected Map<Integer, Queue<CachedBuffer>> initialValue() {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> return newPoolMap();<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> };<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> /**<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> * @return the maximum number of buffers with the same capacity per thread.<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * <tt>0</tt> means 'no limitation'.<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> */<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> public int getMaxPoolSize() {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> return maxPoolSize;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span><a name="line.125"></a> |
| <span class="sourceLineNo">126</span> /**<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> * @return the maximum capacity of a cached buffer. A buffer whose<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * capacity is bigger than this value is not pooled. <tt>0</tt> means<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> * 'no limitation'.<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> */<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> public int getMaxCachedBufferSize() {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> return maxCachedBufferSize;<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> Map<Integer, Queue<CachedBuffer>> newPoolMap() {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> Map<Integer, Queue<CachedBuffer>> poolMap = new HashMap<Integer, Queue<CachedBuffer>>();<a name="line.136"></a> |
| <span class="sourceLineNo">137</span><a name="line.137"></a> |
| <span class="sourceLineNo">138</span> for (int i = 0; i < 31; i++) {<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> poolMap.put(1 << i, new ConcurrentLinkedQueue<CachedBuffer>());<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> poolMap.put(0, new ConcurrentLinkedQueue<CachedBuffer>());<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> poolMap.put(Integer.MAX_VALUE, new ConcurrentLinkedQueue<CachedBuffer>());<a name="line.143"></a> |
| <span class="sourceLineNo">144</span><a name="line.144"></a> |
| <span class="sourceLineNo">145</span> return poolMap;<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> public IoBuffer allocate(int requestedCapacity, boolean direct) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> int actualCapacity = IoBuffer.normalizeCapacity(requestedCapacity);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> IoBuffer buf;<a name="line.150"></a> |
| <span class="sourceLineNo">151</span><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> if ((maxCachedBufferSize != 0) && (actualCapacity > maxCachedBufferSize)) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> if (direct) {<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> buf = wrap(ByteBuffer.allocateDirect(actualCapacity));<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> } else {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> buf = wrap(ByteBuffer.allocate(actualCapacity));<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> }<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> } else {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> Queue<CachedBuffer> pool;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span><a name="line.160"></a> |
| <span class="sourceLineNo">161</span> if (direct) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> pool = directBuffers.get().get(actualCapacity);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> } else {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> pool = heapBuffers.get().get(actualCapacity);<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> }<a name="line.165"></a> |
| <span class="sourceLineNo">166</span><a name="line.166"></a> |
| <span class="sourceLineNo">167</span> // Recycle if possible.<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> buf = pool.poll();<a name="line.168"></a> |
| <span class="sourceLineNo">169</span><a name="line.169"></a> |
| <span class="sourceLineNo">170</span> if (buf != null) {<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> buf.clear();<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> buf.setAutoExpand(false);<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> buf.order(ByteOrder.BIG_ENDIAN);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> } else {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> if (direct) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> buf = wrap(ByteBuffer.allocateDirect(actualCapacity));<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> } else {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> buf = wrap(ByteBuffer.allocate(actualCapacity));<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> }<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> }<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span><a name="line.182"></a> |
| <span class="sourceLineNo">183</span> buf.limit(requestedCapacity);<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> return buf;<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span><a name="line.186"></a> |
| <span class="sourceLineNo">187</span> public ByteBuffer allocateNioBuffer(int capacity, boolean direct) {<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> return allocate(capacity, direct).buf();<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> }<a name="line.189"></a> |
| <span class="sourceLineNo">190</span><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> public IoBuffer wrap(ByteBuffer nioBuffer) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> return new CachedBuffer(nioBuffer);<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> }<a name="line.193"></a> |
| <span class="sourceLineNo">194</span><a name="line.194"></a> |
| <span class="sourceLineNo">195</span> public void dispose() {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // Do nothing<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> private class CachedBuffer extends AbstractIoBuffer {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> private final Thread ownerThread;<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> private ByteBuffer buf;<a name="line.202"></a> |
| <span class="sourceLineNo">203</span><a name="line.203"></a> |
| <span class="sourceLineNo">204</span> protected CachedBuffer(ByteBuffer buf) {<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> super(CachedBufferAllocator.this, buf.capacity());<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> this.ownerThread = Thread.currentThread();<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> this.buf = buf;<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> buf.order(ByteOrder.BIG_ENDIAN);<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> }<a name="line.209"></a> |
| <span class="sourceLineNo">210</span><a name="line.210"></a> |
| <span class="sourceLineNo">211</span> protected CachedBuffer(CachedBuffer parent, ByteBuffer buf) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> super(parent);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> this.ownerThread = Thread.currentThread();<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> this.buf = buf;<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> @Override<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> public ByteBuffer buf() {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> if (buf == null) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> throw new IllegalStateException("Buffer has been freed already.");<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> }<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> return buf;<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> }<a name="line.223"></a> |
| <span class="sourceLineNo">224</span><a name="line.224"></a> |
| <span class="sourceLineNo">225</span> @Override<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> protected void buf(ByteBuffer buf) {<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> ByteBuffer oldBuf = this.buf;<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> this.buf = buf;<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> free(oldBuf);<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span><a name="line.231"></a> |
| <span class="sourceLineNo">232</span> @Override<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> protected IoBuffer duplicate0() {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> return new CachedBuffer(this, buf().duplicate());<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> }<a name="line.235"></a> |
| <span class="sourceLineNo">236</span><a name="line.236"></a> |
| <span class="sourceLineNo">237</span> @Override<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> protected IoBuffer slice0() {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> return new CachedBuffer(this, buf().slice());<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> }<a name="line.240"></a> |
| <span class="sourceLineNo">241</span><a name="line.241"></a> |
| <span class="sourceLineNo">242</span> @Override<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> protected IoBuffer asReadOnlyBuffer0() {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> return new CachedBuffer(this, buf().asReadOnlyBuffer());<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span><a name="line.246"></a> |
| <span class="sourceLineNo">247</span> @Override<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> public byte[] array() {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> return buf().array();<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> }<a name="line.250"></a> |
| <span class="sourceLineNo">251</span><a name="line.251"></a> |
| <span class="sourceLineNo">252</span> @Override<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> public int arrayOffset() {<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> return buf().arrayOffset();<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> }<a name="line.255"></a> |
| <span class="sourceLineNo">256</span><a name="line.256"></a> |
| <span class="sourceLineNo">257</span> @Override<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> public boolean hasArray() {<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> return buf().hasArray();<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span><a name="line.261"></a> |
| <span class="sourceLineNo">262</span> @Override<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> public void free() {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> free(buf);<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> buf = null;<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> }<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> private void free(ByteBuffer oldBuf) {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> if ((oldBuf == null) || ((maxCachedBufferSize != 0) && (oldBuf.capacity() > maxCachedBufferSize))<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> || oldBuf.isReadOnly() || isDerived() || (Thread.currentThread() != ownerThread)) {<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> return;<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> }<a name="line.272"></a> |
| <span class="sourceLineNo">273</span><a name="line.273"></a> |
| <span class="sourceLineNo">274</span> // Add to the cache.<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> Queue<CachedBuffer> pool;<a name="line.275"></a> |
| <span class="sourceLineNo">276</span><a name="line.276"></a> |
| <span class="sourceLineNo">277</span> if (oldBuf.isDirect()) {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> pool = directBuffers.get().get(oldBuf.capacity());<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> } else {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> pool = heapBuffers.get().get(oldBuf.capacity());<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span><a name="line.282"></a> |
| <span class="sourceLineNo">283</span> if (pool == null) {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> return;<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> }<a name="line.285"></a> |
| <span class="sourceLineNo">286</span><a name="line.286"></a> |
| <span class="sourceLineNo">287</span> // Restrict the size of the pool to prevent OOM.<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> if ((maxPoolSize == 0) || (pool.size() < maxPoolSize)) {<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> pool.offer(new CachedBuffer(oldBuf));<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> }<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> }<a name="line.292"></a> |
| <span class="sourceLineNo">293</span>}<a name="line.293"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
