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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, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.util;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.nio.ByteBuffer;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.nio.ByteOrder;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.unsafe.HBasePlatformDependent;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hbase.thirdparty.io.netty.util.internal.PlatformDependent;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>@InterfaceAudience.Private<a name="line.28"></a>
<span class="sourceLineNo">029</span>@InterfaceStability.Evolving<a name="line.29"></a>
<span class="sourceLineNo">030</span>public final class UnsafeAccess {<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span> /** The offset to the first element in a byte array. */<a name="line.32"></a>
<span class="sourceLineNo">033</span> public static final long BYTE_ARRAY_BASE_OFFSET;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span> public static final boolean LITTLE_ENDIAN =<a name="line.35"></a>
<span class="sourceLineNo">036</span> ByteOrder.nativeOrder().equals(ByteOrder.LITTLE_ENDIAN);<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span> // This number limits the number of bytes to copy per call to Unsafe's<a name="line.38"></a>
<span class="sourceLineNo">039</span> // copyMemory method. A limit is imposed to allow for safepoint polling<a name="line.39"></a>
<span class="sourceLineNo">040</span> // during a large copy<a name="line.40"></a>
<span class="sourceLineNo">041</span> static final long UNSAFE_COPY_THRESHOLD = 1024L * 1024L;<a name="line.41"></a>
<span class="sourceLineNo">042</span> static {<a name="line.42"></a>
<span class="sourceLineNo">043</span> if (HBasePlatformDependent.isUnsafeAvailable()) {<a name="line.43"></a>
<span class="sourceLineNo">044</span> BYTE_ARRAY_BASE_OFFSET = HBasePlatformDependent.arrayBaseOffset(byte[].class);<a name="line.44"></a>
<span class="sourceLineNo">045</span> } else {<a name="line.45"></a>
<span class="sourceLineNo">046</span> BYTE_ARRAY_BASE_OFFSET = -1;<a name="line.46"></a>
<span class="sourceLineNo">047</span> }<a name="line.47"></a>
<span class="sourceLineNo">048</span> }<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> private UnsafeAccess() {<a name="line.50"></a>
<span class="sourceLineNo">051</span> }<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span> // APIs to read primitive data from a byte[] using Unsafe way<a name="line.53"></a>
<span class="sourceLineNo">054</span> /**<a name="line.54"></a>
<span class="sourceLineNo">055</span> * Converts a byte array to a short value considering it was written in big-endian format.<a name="line.55"></a>
<span class="sourceLineNo">056</span> * @param bytes byte array<a name="line.56"></a>
<span class="sourceLineNo">057</span> * @param offset offset into array<a name="line.57"></a>
<span class="sourceLineNo">058</span> * @return the short value<a name="line.58"></a>
<span class="sourceLineNo">059</span> */<a name="line.59"></a>
<span class="sourceLineNo">060</span> public static short toShort(byte[] bytes, int offset) {<a name="line.60"></a>
<span class="sourceLineNo">061</span> if (LITTLE_ENDIAN) {<a name="line.61"></a>
<span class="sourceLineNo">062</span> return Short<a name="line.62"></a>
<span class="sourceLineNo">063</span> .reverseBytes(HBasePlatformDependent.getShort(bytes, offset + BYTE_ARRAY_BASE_OFFSET));<a name="line.63"></a>
<span class="sourceLineNo">064</span> } else {<a name="line.64"></a>
<span class="sourceLineNo">065</span> return HBasePlatformDependent.getShort(bytes, offset + BYTE_ARRAY_BASE_OFFSET);<a name="line.65"></a>
<span class="sourceLineNo">066</span> }<a name="line.66"></a>
<span class="sourceLineNo">067</span> }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span> /**<a name="line.69"></a>
<span class="sourceLineNo">070</span> * Converts a byte array to an int value considering it was written in big-endian format.<a name="line.70"></a>
<span class="sourceLineNo">071</span> * @param bytes byte array<a name="line.71"></a>
<span class="sourceLineNo">072</span> * @param offset offset into array<a name="line.72"></a>
<span class="sourceLineNo">073</span> * @return the int value<a name="line.73"></a>
<span class="sourceLineNo">074</span> */<a name="line.74"></a>
<span class="sourceLineNo">075</span> public static int toInt(byte[] bytes, int offset) {<a name="line.75"></a>
<span class="sourceLineNo">076</span> if (LITTLE_ENDIAN) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> return Integer<a name="line.77"></a>
<span class="sourceLineNo">078</span> .reverseBytes(HBasePlatformDependent.getInt(bytes, offset + BYTE_ARRAY_BASE_OFFSET));<a name="line.78"></a>
<span class="sourceLineNo">079</span> } else {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return HBasePlatformDependent.getInt(bytes, offset + BYTE_ARRAY_BASE_OFFSET);<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><a name="line.83"></a>
<span class="sourceLineNo">084</span> /**<a name="line.84"></a>
<span class="sourceLineNo">085</span> * Converts a byte array to a long value considering it was written in big-endian format.<a name="line.85"></a>
<span class="sourceLineNo">086</span> * @param bytes byte array<a name="line.86"></a>
<span class="sourceLineNo">087</span> * @param offset offset into array<a name="line.87"></a>
<span class="sourceLineNo">088</span> * @return the long value<a name="line.88"></a>
<span class="sourceLineNo">089</span> */<a name="line.89"></a>
<span class="sourceLineNo">090</span> public static long toLong(byte[] bytes, int offset) {<a name="line.90"></a>
<span class="sourceLineNo">091</span> if (LITTLE_ENDIAN) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> return Long<a name="line.92"></a>
<span class="sourceLineNo">093</span> .reverseBytes(HBasePlatformDependent.getLong(bytes, offset + BYTE_ARRAY_BASE_OFFSET));<a name="line.93"></a>
<span class="sourceLineNo">094</span> } else {<a name="line.94"></a>
<span class="sourceLineNo">095</span> return HBasePlatformDependent.getLong(bytes, offset + BYTE_ARRAY_BASE_OFFSET);<a name="line.95"></a>
<span class="sourceLineNo">096</span> }<a name="line.96"></a>
<span class="sourceLineNo">097</span> }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span> // APIs to write primitive data to a byte[] using Unsafe way<a name="line.99"></a>
<span class="sourceLineNo">100</span> /**<a name="line.100"></a>
<span class="sourceLineNo">101</span> * Put a short value out to the specified byte array position in big-endian format.<a name="line.101"></a>
<span class="sourceLineNo">102</span> * @param bytes the byte array<a name="line.102"></a>
<span class="sourceLineNo">103</span> * @param offset position in the array<a name="line.103"></a>
<span class="sourceLineNo">104</span> * @param val short to write out<a name="line.104"></a>
<span class="sourceLineNo">105</span> * @return incremented offset<a name="line.105"></a>
<span class="sourceLineNo">106</span> */<a name="line.106"></a>
<span class="sourceLineNo">107</span> public static int putShort(byte[] bytes, int offset, short val) {<a name="line.107"></a>
<span class="sourceLineNo">108</span> if (LITTLE_ENDIAN) {<a name="line.108"></a>
<span class="sourceLineNo">109</span> val = Short.reverseBytes(val);<a name="line.109"></a>
<span class="sourceLineNo">110</span> }<a name="line.110"></a>
<span class="sourceLineNo">111</span> HBasePlatformDependent.putShort(bytes, offset + BYTE_ARRAY_BASE_OFFSET, val);<a name="line.111"></a>
<span class="sourceLineNo">112</span> return offset + Bytes.SIZEOF_SHORT;<a name="line.112"></a>
<span class="sourceLineNo">113</span> }<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> * Put an int value out to the specified byte array position in big-endian format.<a name="line.116"></a>
<span class="sourceLineNo">117</span> * @param bytes the byte array<a name="line.117"></a>
<span class="sourceLineNo">118</span> * @param offset position in the array<a name="line.118"></a>
<span class="sourceLineNo">119</span> * @param val int to write out<a name="line.119"></a>
<span class="sourceLineNo">120</span> * @return incremented offset<a name="line.120"></a>
<span class="sourceLineNo">121</span> */<a name="line.121"></a>
<span class="sourceLineNo">122</span> public static int putInt(byte[] bytes, int offset, int val) {<a name="line.122"></a>
<span class="sourceLineNo">123</span> if (LITTLE_ENDIAN) {<a name="line.123"></a>
<span class="sourceLineNo">124</span> val = Integer.reverseBytes(val);<a name="line.124"></a>
<span class="sourceLineNo">125</span> }<a name="line.125"></a>
<span class="sourceLineNo">126</span> HBasePlatformDependent.putInt(bytes, offset + BYTE_ARRAY_BASE_OFFSET, val);<a name="line.126"></a>
<span class="sourceLineNo">127</span> return offset + Bytes.SIZEOF_INT;<a name="line.127"></a>
<span class="sourceLineNo">128</span> }<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>
<span class="sourceLineNo">130</span> /**<a name="line.130"></a>
<span class="sourceLineNo">131</span> * Put a long value out to the specified byte array position in big-endian format.<a name="line.131"></a>
<span class="sourceLineNo">132</span> * @param bytes the byte array<a name="line.132"></a>
<span class="sourceLineNo">133</span> * @param offset position in the array<a name="line.133"></a>
<span class="sourceLineNo">134</span> * @param val long to write out<a name="line.134"></a>
<span class="sourceLineNo">135</span> * @return incremented offset<a name="line.135"></a>
<span class="sourceLineNo">136</span> */<a name="line.136"></a>
<span class="sourceLineNo">137</span> public static int putLong(byte[] bytes, int offset, long val) {<a name="line.137"></a>
<span class="sourceLineNo">138</span> if (LITTLE_ENDIAN) {<a name="line.138"></a>
<span class="sourceLineNo">139</span> val = Long.reverseBytes(val);<a name="line.139"></a>
<span class="sourceLineNo">140</span> }<a name="line.140"></a>
<span class="sourceLineNo">141</span> HBasePlatformDependent.putLong(bytes, offset + BYTE_ARRAY_BASE_OFFSET, val);<a name="line.141"></a>
<span class="sourceLineNo">142</span> return offset + Bytes.SIZEOF_LONG;<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> // APIs to read primitive data from a ByteBuffer using Unsafe way<a name="line.145"></a>
<span class="sourceLineNo">146</span> /**<a name="line.146"></a>
<span class="sourceLineNo">147</span> * Reads a short value at the given buffer's offset considering it was written in big-endian<a name="line.147"></a>
<span class="sourceLineNo">148</span> * format.<a name="line.148"></a>
<span class="sourceLineNo">149</span> * @return short value at offset<a name="line.149"></a>
<span class="sourceLineNo">150</span> */<a name="line.150"></a>
<span class="sourceLineNo">151</span> public static short toShort(ByteBuffer buf, int offset) {<a name="line.151"></a>
<span class="sourceLineNo">152</span> if (LITTLE_ENDIAN) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> return Short.reverseBytes(getAsShort(buf, offset));<a name="line.153"></a>
<span class="sourceLineNo">154</span> }<a name="line.154"></a>
<span class="sourceLineNo">155</span> return getAsShort(buf, offset);<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span><a name="line.157"></a>
<span class="sourceLineNo">158</span> /**<a name="line.158"></a>
<span class="sourceLineNo">159</span> * Reads a short value at the given Object's offset considering it was written in big-endian<a name="line.159"></a>
<span class="sourceLineNo">160</span> * format.<a name="line.160"></a>
<span class="sourceLineNo">161</span> * @return short value at offset<a name="line.161"></a>
<span class="sourceLineNo">162</span> */<a name="line.162"></a>
<span class="sourceLineNo">163</span> public static short toShort(Object ref, long offset) {<a name="line.163"></a>
<span class="sourceLineNo">164</span> if (LITTLE_ENDIAN) {<a name="line.164"></a>
<span class="sourceLineNo">165</span> return Short.reverseBytes(HBasePlatformDependent.getShort(ref, offset));<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span> return HBasePlatformDependent.getShort(ref, offset);<a name="line.167"></a>
<span class="sourceLineNo">168</span> }<a name="line.168"></a>
<span class="sourceLineNo">169</span><a name="line.169"></a>
<span class="sourceLineNo">170</span> /**<a name="line.170"></a>
<span class="sourceLineNo">171</span> * Reads bytes at the given offset as a short value.<a name="line.171"></a>
<span class="sourceLineNo">172</span> * @return short value at offset<a name="line.172"></a>
<span class="sourceLineNo">173</span> */<a name="line.173"></a>
<span class="sourceLineNo">174</span> private static short getAsShort(ByteBuffer buf, int offset) {<a name="line.174"></a>
<span class="sourceLineNo">175</span> if (buf.isDirect()) {<a name="line.175"></a>
<span class="sourceLineNo">176</span> return HBasePlatformDependent.getShort(directBufferAddress(buf) + offset);<a name="line.176"></a>
<span class="sourceLineNo">177</span> }<a name="line.177"></a>
<span class="sourceLineNo">178</span> return HBasePlatformDependent.getShort(buf.array(),<a name="line.178"></a>
<span class="sourceLineNo">179</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset);<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> * Reads an int value at the given buffer's offset considering it was written in big-endian<a name="line.183"></a>
<span class="sourceLineNo">184</span> * format.<a name="line.184"></a>
<span class="sourceLineNo">185</span> * @return int value at offset<a name="line.185"></a>
<span class="sourceLineNo">186</span> */<a name="line.186"></a>
<span class="sourceLineNo">187</span> public static int toInt(ByteBuffer buf, int offset) {<a name="line.187"></a>
<span class="sourceLineNo">188</span> if (LITTLE_ENDIAN) {<a name="line.188"></a>
<span class="sourceLineNo">189</span> return Integer.reverseBytes(getAsInt(buf, offset));<a name="line.189"></a>
<span class="sourceLineNo">190</span> }<a name="line.190"></a>
<span class="sourceLineNo">191</span> return getAsInt(buf, offset);<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<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> * Reads a int value at the given Object's offset considering it was written in big-endian format.<a name="line.195"></a>
<span class="sourceLineNo">196</span> * nn * @return int value at offset<a name="line.196"></a>
<span class="sourceLineNo">197</span> */<a name="line.197"></a>
<span class="sourceLineNo">198</span> public static int toInt(Object ref, long offset) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> if (LITTLE_ENDIAN) {<a name="line.199"></a>
<span class="sourceLineNo">200</span> return Integer.reverseBytes(HBasePlatformDependent.getInt(ref, offset));<a name="line.200"></a>
<span class="sourceLineNo">201</span> }<a name="line.201"></a>
<span class="sourceLineNo">202</span> return HBasePlatformDependent.getInt(ref, offset);<a name="line.202"></a>
<span class="sourceLineNo">203</span> }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span> /**<a name="line.205"></a>
<span class="sourceLineNo">206</span> * Reads bytes at the given offset as an int value.<a name="line.206"></a>
<span class="sourceLineNo">207</span> * @return int value at offset<a name="line.207"></a>
<span class="sourceLineNo">208</span> */<a name="line.208"></a>
<span class="sourceLineNo">209</span> private static int getAsInt(ByteBuffer buf, int offset) {<a name="line.209"></a>
<span class="sourceLineNo">210</span> if (buf.isDirect()) {<a name="line.210"></a>
<span class="sourceLineNo">211</span> return HBasePlatformDependent.getInt(directBufferAddress(buf) + offset);<a name="line.211"></a>
<span class="sourceLineNo">212</span> }<a name="line.212"></a>
<span class="sourceLineNo">213</span> return HBasePlatformDependent.getInt(buf.array(),<a name="line.213"></a>
<span class="sourceLineNo">214</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset);<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> /**<a name="line.217"></a>
<span class="sourceLineNo">218</span> * Reads a long value at the given buffer's offset considering it was written in big-endian<a name="line.218"></a>
<span class="sourceLineNo">219</span> * format.<a name="line.219"></a>
<span class="sourceLineNo">220</span> * @return long value at offset<a name="line.220"></a>
<span class="sourceLineNo">221</span> */<a name="line.221"></a>
<span class="sourceLineNo">222</span> public static long toLong(ByteBuffer buf, int offset) {<a name="line.222"></a>
<span class="sourceLineNo">223</span> if (LITTLE_ENDIAN) {<a name="line.223"></a>
<span class="sourceLineNo">224</span> return Long.reverseBytes(getAsLong(buf, offset));<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span> return getAsLong(buf, offset);<a name="line.226"></a>
<span class="sourceLineNo">227</span> }<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span> /**<a name="line.229"></a>
<span class="sourceLineNo">230</span> * Reads a long value at the given Object's offset considering it was written in big-endian<a name="line.230"></a>
<span class="sourceLineNo">231</span> * format.<a name="line.231"></a>
<span class="sourceLineNo">232</span> * @return long value at offset<a name="line.232"></a>
<span class="sourceLineNo">233</span> */<a name="line.233"></a>
<span class="sourceLineNo">234</span> public static long toLong(Object ref, long offset) {<a name="line.234"></a>
<span class="sourceLineNo">235</span> if (LITTLE_ENDIAN) {<a name="line.235"></a>
<span class="sourceLineNo">236</span> return Long.reverseBytes(HBasePlatformDependent.getLong(ref, offset));<a name="line.236"></a>
<span class="sourceLineNo">237</span> }<a name="line.237"></a>
<span class="sourceLineNo">238</span> return HBasePlatformDependent.getLong(ref, offset);<a name="line.238"></a>
<span class="sourceLineNo">239</span> }<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> * Reads bytes at the given offset as a long value.<a name="line.242"></a>
<span class="sourceLineNo">243</span> * @return long value at offset<a name="line.243"></a>
<span class="sourceLineNo">244</span> */<a name="line.244"></a>
<span class="sourceLineNo">245</span> private static long getAsLong(ByteBuffer buf, int offset) {<a name="line.245"></a>
<span class="sourceLineNo">246</span> if (buf.isDirect()) {<a name="line.246"></a>
<span class="sourceLineNo">247</span> return HBasePlatformDependent.getLong(directBufferAddress(buf) + offset);<a name="line.247"></a>
<span class="sourceLineNo">248</span> }<a name="line.248"></a>
<span class="sourceLineNo">249</span> return HBasePlatformDependent.getLong(buf.array(),<a name="line.249"></a>
<span class="sourceLineNo">250</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset);<a name="line.250"></a>
<span class="sourceLineNo">251</span> }<a name="line.251"></a>
<span class="sourceLineNo">252</span><a name="line.252"></a>
<span class="sourceLineNo">253</span> /**<a name="line.253"></a>
<span class="sourceLineNo">254</span> * Returns the byte at the given offset<a name="line.254"></a>
<span class="sourceLineNo">255</span> * @param buf the buffer to read<a name="line.255"></a>
<span class="sourceLineNo">256</span> * @param offset the offset at which the byte has to be read<a name="line.256"></a>
<span class="sourceLineNo">257</span> * @return the byte at the given offset<a name="line.257"></a>
<span class="sourceLineNo">258</span> */<a name="line.258"></a>
<span class="sourceLineNo">259</span> public static byte toByte(ByteBuffer buf, int offset) {<a name="line.259"></a>
<span class="sourceLineNo">260</span> if (buf.isDirect()) {<a name="line.260"></a>
<span class="sourceLineNo">261</span> return HBasePlatformDependent.getByte(directBufferAddress(buf) + offset);<a name="line.261"></a>
<span class="sourceLineNo">262</span> } else {<a name="line.262"></a>
<span class="sourceLineNo">263</span> return HBasePlatformDependent.getByte(buf.array(),<a name="line.263"></a>
<span class="sourceLineNo">264</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset);<a name="line.264"></a>
<span class="sourceLineNo">265</span> }<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> /**<a name="line.268"></a>
<span class="sourceLineNo">269</span> * Returns the byte at the given offset of the object<a name="line.269"></a>
<span class="sourceLineNo">270</span> * @return the byte at the given offset<a name="line.270"></a>
<span class="sourceLineNo">271</span> */<a name="line.271"></a>
<span class="sourceLineNo">272</span> public static byte toByte(Object ref, long offset) {<a name="line.272"></a>
<span class="sourceLineNo">273</span> return HBasePlatformDependent.getByte(ref, offset);<a name="line.273"></a>
<span class="sourceLineNo">274</span> }<a name="line.274"></a>
<span class="sourceLineNo">275</span><a name="line.275"></a>
<span class="sourceLineNo">276</span> /**<a name="line.276"></a>
<span class="sourceLineNo">277</span> * Put an int value out to the specified ByteBuffer offset in big-endian format.<a name="line.277"></a>
<span class="sourceLineNo">278</span> * @param buf the ByteBuffer to write to<a name="line.278"></a>
<span class="sourceLineNo">279</span> * @param offset offset in the ByteBuffer<a name="line.279"></a>
<span class="sourceLineNo">280</span> * @param val int to write out<a name="line.280"></a>
<span class="sourceLineNo">281</span> * @return incremented offset<a name="line.281"></a>
<span class="sourceLineNo">282</span> */<a name="line.282"></a>
<span class="sourceLineNo">283</span> public static int putInt(ByteBuffer buf, int offset, int val) {<a name="line.283"></a>
<span class="sourceLineNo">284</span> if (LITTLE_ENDIAN) {<a name="line.284"></a>
<span class="sourceLineNo">285</span> val = Integer.reverseBytes(val);<a name="line.285"></a>
<span class="sourceLineNo">286</span> }<a name="line.286"></a>
<span class="sourceLineNo">287</span> if (buf.isDirect()) {<a name="line.287"></a>
<span class="sourceLineNo">288</span> HBasePlatformDependent.putInt(directBufferAddress(buf) + offset, val);<a name="line.288"></a>
<span class="sourceLineNo">289</span> } else {<a name="line.289"></a>
<span class="sourceLineNo">290</span> HBasePlatformDependent.putInt(buf.array(),<a name="line.290"></a>
<span class="sourceLineNo">291</span> offset + buf.arrayOffset() + BYTE_ARRAY_BASE_OFFSET, val);<a name="line.291"></a>
<span class="sourceLineNo">292</span> }<a name="line.292"></a>
<span class="sourceLineNo">293</span> return offset + Bytes.SIZEOF_INT;<a name="line.293"></a>
<span class="sourceLineNo">294</span> }<a name="line.294"></a>
<span class="sourceLineNo">295</span><a name="line.295"></a>
<span class="sourceLineNo">296</span> // APIs to copy data. This will be direct memory location copy and will be much faster<a name="line.296"></a>
<span class="sourceLineNo">297</span> /**<a name="line.297"></a>
<span class="sourceLineNo">298</span> * Copies the bytes from given array's offset to length part into the given buffer.<a name="line.298"></a>
<span class="sourceLineNo">299</span> * @param src source array<a name="line.299"></a>
<span class="sourceLineNo">300</span> * @param srcOffset offset into source buffer<a name="line.300"></a>
<span class="sourceLineNo">301</span> * @param dest destination buffer<a name="line.301"></a>
<span class="sourceLineNo">302</span> * @param destOffset offset into destination buffer<a name="line.302"></a>
<span class="sourceLineNo">303</span> * @param length length of data to copy<a name="line.303"></a>
<span class="sourceLineNo">304</span> */<a name="line.304"></a>
<span class="sourceLineNo">305</span> public static void copy(byte[] src, int srcOffset, ByteBuffer dest, int destOffset, int length) {<a name="line.305"></a>
<span class="sourceLineNo">306</span> long destAddress = destOffset;<a name="line.306"></a>
<span class="sourceLineNo">307</span> Object destBase = null;<a name="line.307"></a>
<span class="sourceLineNo">308</span> if (dest.isDirect()) {<a name="line.308"></a>
<span class="sourceLineNo">309</span> destAddress = destAddress + directBufferAddress(dest);<a name="line.309"></a>
<span class="sourceLineNo">310</span> } else {<a name="line.310"></a>
<span class="sourceLineNo">311</span> destAddress = destAddress + BYTE_ARRAY_BASE_OFFSET + dest.arrayOffset();<a name="line.311"></a>
<span class="sourceLineNo">312</span> destBase = dest.array();<a name="line.312"></a>
<span class="sourceLineNo">313</span> }<a name="line.313"></a>
<span class="sourceLineNo">314</span> long srcAddress = srcOffset + BYTE_ARRAY_BASE_OFFSET;<a name="line.314"></a>
<span class="sourceLineNo">315</span> unsafeCopy(src, srcAddress, destBase, destAddress, length);<a name="line.315"></a>
<span class="sourceLineNo">316</span> }<a name="line.316"></a>
<span class="sourceLineNo">317</span><a name="line.317"></a>
<span class="sourceLineNo">318</span> private static void unsafeCopy(Object src, long srcAddr, Object dst, long destAddr, long len) {<a name="line.318"></a>
<span class="sourceLineNo">319</span> while (len &gt; 0) {<a name="line.319"></a>
<span class="sourceLineNo">320</span> long size = (len &gt; UNSAFE_COPY_THRESHOLD) ? UNSAFE_COPY_THRESHOLD : len;<a name="line.320"></a>
<span class="sourceLineNo">321</span> HBasePlatformDependent.copyMemory(src, srcAddr, dst, destAddr, size);<a name="line.321"></a>
<span class="sourceLineNo">322</span> len -= size;<a name="line.322"></a>
<span class="sourceLineNo">323</span> srcAddr += size;<a name="line.323"></a>
<span class="sourceLineNo">324</span> destAddr += size;<a name="line.324"></a>
<span class="sourceLineNo">325</span> }<a name="line.325"></a>
<span class="sourceLineNo">326</span> }<a name="line.326"></a>
<span class="sourceLineNo">327</span><a name="line.327"></a>
<span class="sourceLineNo">328</span> /**<a name="line.328"></a>
<span class="sourceLineNo">329</span> * Copies specified number of bytes from given offset of {@code src} ByteBuffer to the<a name="line.329"></a>
<span class="sourceLineNo">330</span> * {@code dest} array.<a name="line.330"></a>
<span class="sourceLineNo">331</span> * @param src source buffer<a name="line.331"></a>
<span class="sourceLineNo">332</span> * @param srcOffset offset into source buffer<a name="line.332"></a>
<span class="sourceLineNo">333</span> * @param dest destination array<a name="line.333"></a>
<span class="sourceLineNo">334</span> * @param destOffset offset into destination buffer<a name="line.334"></a>
<span class="sourceLineNo">335</span> * @param length length of data to copy<a name="line.335"></a>
<span class="sourceLineNo">336</span> */<a name="line.336"></a>
<span class="sourceLineNo">337</span> public static void copy(ByteBuffer src, int srcOffset, byte[] dest, int destOffset, int length) {<a name="line.337"></a>
<span class="sourceLineNo">338</span> long srcAddress = srcOffset;<a name="line.338"></a>
<span class="sourceLineNo">339</span> Object srcBase = null;<a name="line.339"></a>
<span class="sourceLineNo">340</span> if (src.isDirect()) {<a name="line.340"></a>
<span class="sourceLineNo">341</span> srcAddress = srcAddress + directBufferAddress(src);<a name="line.341"></a>
<span class="sourceLineNo">342</span> } else {<a name="line.342"></a>
<span class="sourceLineNo">343</span> srcAddress = srcAddress + BYTE_ARRAY_BASE_OFFSET + src.arrayOffset();<a name="line.343"></a>
<span class="sourceLineNo">344</span> srcBase = src.array();<a name="line.344"></a>
<span class="sourceLineNo">345</span> }<a name="line.345"></a>
<span class="sourceLineNo">346</span> long destAddress = destOffset + BYTE_ARRAY_BASE_OFFSET;<a name="line.346"></a>
<span class="sourceLineNo">347</span> unsafeCopy(srcBase, srcAddress, dest, destAddress, length);<a name="line.347"></a>
<span class="sourceLineNo">348</span> }<a name="line.348"></a>
<span class="sourceLineNo">349</span><a name="line.349"></a>
<span class="sourceLineNo">350</span> /**<a name="line.350"></a>
<span class="sourceLineNo">351</span> * Copies specified number of bytes from given offset of {@code src} buffer into the {@code dest}<a name="line.351"></a>
<span class="sourceLineNo">352</span> * buffer.<a name="line.352"></a>
<span class="sourceLineNo">353</span> * @param src source buffer<a name="line.353"></a>
<span class="sourceLineNo">354</span> * @param srcOffset offset into source buffer<a name="line.354"></a>
<span class="sourceLineNo">355</span> * @param dest destination buffer<a name="line.355"></a>
<span class="sourceLineNo">356</span> * @param destOffset offset into destination buffer<a name="line.356"></a>
<span class="sourceLineNo">357</span> * @param length length of data to copy<a name="line.357"></a>
<span class="sourceLineNo">358</span> */<a name="line.358"></a>
<span class="sourceLineNo">359</span> public static void copy(ByteBuffer src, int srcOffset, ByteBuffer dest, int destOffset,<a name="line.359"></a>
<span class="sourceLineNo">360</span> int length) {<a name="line.360"></a>
<span class="sourceLineNo">361</span> long srcAddress, destAddress;<a name="line.361"></a>
<span class="sourceLineNo">362</span> Object srcBase = null, destBase = null;<a name="line.362"></a>
<span class="sourceLineNo">363</span> if (src.isDirect()) {<a name="line.363"></a>
<span class="sourceLineNo">364</span> srcAddress = srcOffset + directBufferAddress(src);<a name="line.364"></a>
<span class="sourceLineNo">365</span> } else {<a name="line.365"></a>
<span class="sourceLineNo">366</span> srcAddress = (long) srcOffset + src.arrayOffset() + BYTE_ARRAY_BASE_OFFSET;<a name="line.366"></a>
<span class="sourceLineNo">367</span> srcBase = src.array();<a name="line.367"></a>
<span class="sourceLineNo">368</span> }<a name="line.368"></a>
<span class="sourceLineNo">369</span> if (dest.isDirect()) {<a name="line.369"></a>
<span class="sourceLineNo">370</span> destAddress = destOffset + directBufferAddress(dest);<a name="line.370"></a>
<span class="sourceLineNo">371</span> } else {<a name="line.371"></a>
<span class="sourceLineNo">372</span> destAddress = destOffset + BYTE_ARRAY_BASE_OFFSET + dest.arrayOffset();<a name="line.372"></a>
<span class="sourceLineNo">373</span> destBase = dest.array();<a name="line.373"></a>
<span class="sourceLineNo">374</span> }<a name="line.374"></a>
<span class="sourceLineNo">375</span> unsafeCopy(srcBase, srcAddress, destBase, destAddress, length);<a name="line.375"></a>
<span class="sourceLineNo">376</span> }<a name="line.376"></a>
<span class="sourceLineNo">377</span><a name="line.377"></a>
<span class="sourceLineNo">378</span> // APIs to add primitives to BBs<a name="line.378"></a>
<span class="sourceLineNo">379</span> /**<a name="line.379"></a>
<span class="sourceLineNo">380</span> * Put a short value out to the specified BB position in big-endian format.<a name="line.380"></a>
<span class="sourceLineNo">381</span> * @param buf the byte buffer<a name="line.381"></a>
<span class="sourceLineNo">382</span> * @param offset position in the buffer<a name="line.382"></a>
<span class="sourceLineNo">383</span> * @param val short to write out<a name="line.383"></a>
<span class="sourceLineNo">384</span> * @return incremented offset<a name="line.384"></a>
<span class="sourceLineNo">385</span> */<a name="line.385"></a>
<span class="sourceLineNo">386</span> public static int putShort(ByteBuffer buf, int offset, short val) {<a name="line.386"></a>
<span class="sourceLineNo">387</span> if (LITTLE_ENDIAN) {<a name="line.387"></a>
<span class="sourceLineNo">388</span> val = Short.reverseBytes(val);<a name="line.388"></a>
<span class="sourceLineNo">389</span> }<a name="line.389"></a>
<span class="sourceLineNo">390</span> if (buf.isDirect()) {<a name="line.390"></a>
<span class="sourceLineNo">391</span> HBasePlatformDependent.putShort(directBufferAddress(buf) + offset, val);<a name="line.391"></a>
<span class="sourceLineNo">392</span> } else {<a name="line.392"></a>
<span class="sourceLineNo">393</span> HBasePlatformDependent.putShort(buf.array(),<a name="line.393"></a>
<span class="sourceLineNo">394</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset, val);<a name="line.394"></a>
<span class="sourceLineNo">395</span> }<a name="line.395"></a>
<span class="sourceLineNo">396</span> return offset + Bytes.SIZEOF_SHORT;<a name="line.396"></a>
<span class="sourceLineNo">397</span> }<a name="line.397"></a>
<span class="sourceLineNo">398</span><a name="line.398"></a>
<span class="sourceLineNo">399</span> /**<a name="line.399"></a>
<span class="sourceLineNo">400</span> * Put a long value out to the specified BB position in big-endian format.<a name="line.400"></a>
<span class="sourceLineNo">401</span> * @param buf the byte buffer<a name="line.401"></a>
<span class="sourceLineNo">402</span> * @param offset position in the buffer<a name="line.402"></a>
<span class="sourceLineNo">403</span> * @param val long to write out<a name="line.403"></a>
<span class="sourceLineNo">404</span> * @return incremented offset<a name="line.404"></a>
<span class="sourceLineNo">405</span> */<a name="line.405"></a>
<span class="sourceLineNo">406</span> public static int putLong(ByteBuffer buf, int offset, long val) {<a name="line.406"></a>
<span class="sourceLineNo">407</span> if (LITTLE_ENDIAN) {<a name="line.407"></a>
<span class="sourceLineNo">408</span> val = Long.reverseBytes(val);<a name="line.408"></a>
<span class="sourceLineNo">409</span> }<a name="line.409"></a>
<span class="sourceLineNo">410</span> if (buf.isDirect()) {<a name="line.410"></a>
<span class="sourceLineNo">411</span> HBasePlatformDependent.putLong(directBufferAddress(buf) + offset, val);<a name="line.411"></a>
<span class="sourceLineNo">412</span> } else {<a name="line.412"></a>
<span class="sourceLineNo">413</span> HBasePlatformDependent.putLong(buf.array(),<a name="line.413"></a>
<span class="sourceLineNo">414</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset, val);<a name="line.414"></a>
<span class="sourceLineNo">415</span> }<a name="line.415"></a>
<span class="sourceLineNo">416</span> return offset + Bytes.SIZEOF_LONG;<a name="line.416"></a>
<span class="sourceLineNo">417</span> }<a name="line.417"></a>
<span class="sourceLineNo">418</span><a name="line.418"></a>
<span class="sourceLineNo">419</span> /**<a name="line.419"></a>
<span class="sourceLineNo">420</span> * Put a byte value out to the specified BB position in big-endian format.<a name="line.420"></a>
<span class="sourceLineNo">421</span> * @param buf the byte buffer<a name="line.421"></a>
<span class="sourceLineNo">422</span> * @param offset position in the buffer<a name="line.422"></a>
<span class="sourceLineNo">423</span> * @param b byte to write out<a name="line.423"></a>
<span class="sourceLineNo">424</span> * @return incremented offset<a name="line.424"></a>
<span class="sourceLineNo">425</span> */<a name="line.425"></a>
<span class="sourceLineNo">426</span> public static int putByte(ByteBuffer buf, int offset, byte b) {<a name="line.426"></a>
<span class="sourceLineNo">427</span> if (buf.isDirect()) {<a name="line.427"></a>
<span class="sourceLineNo">428</span> HBasePlatformDependent.putByte(directBufferAddress(buf) + offset, b);<a name="line.428"></a>
<span class="sourceLineNo">429</span> } else {<a name="line.429"></a>
<span class="sourceLineNo">430</span> HBasePlatformDependent.putByte(buf.array(),<a name="line.430"></a>
<span class="sourceLineNo">431</span> BYTE_ARRAY_BASE_OFFSET + buf.arrayOffset() + offset, b);<a name="line.431"></a>
<span class="sourceLineNo">432</span> }<a name="line.432"></a>
<span class="sourceLineNo">433</span> return offset + 1;<a name="line.433"></a>
<span class="sourceLineNo">434</span> }<a name="line.434"></a>
<span class="sourceLineNo">435</span><a name="line.435"></a>
<span class="sourceLineNo">436</span> public static long directBufferAddress(ByteBuffer buf) {<a name="line.436"></a>
<span class="sourceLineNo">437</span> return PlatformDependent.directBufferAddress(buf);<a name="line.437"></a>
<span class="sourceLineNo">438</span> }<a name="line.438"></a>
<span class="sourceLineNo">439</span><a name="line.439"></a>
<span class="sourceLineNo">440</span> public static void freeDirectBuffer(ByteBuffer buffer) {<a name="line.440"></a>
<span class="sourceLineNo">441</span> // here we just use the method in netty<a name="line.441"></a>
<span class="sourceLineNo">442</span> PlatformDependent.freeDirectBuffer(buffer);<a name="line.442"></a>
<span class="sourceLineNo">443</span> }<a name="line.443"></a>
<span class="sourceLineNo">444</span>}<a name="line.444"></a>
</pre>
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