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<li class="navelem"><a class="el" href="dir_1efe588324fc547683bba4a3f1bac847.html">core</a></li><li class="navelem"><a class="el" href="dir_0fd6a22b48ba7ca96d8c1554e5fff3e1.html">Store</a></li> </ul>
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<div class="title">MMapDirectory.cs</div> </div>
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<a href="_m_map_directory_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/* </span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * this work for additional information regarding copyright ownership.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * (the &quot;License&quot;); you may not use this file except in compliance with</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_m_map_directory_8cs.html#a4d21c5a1cd18c33bc4f3633bd17d823b"> 20</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_documents_writer_8cs.html#a4d21c5a1cd18c33bc4f3633bd17d823b">Constants</a> = Lucene.Net.Util.Constants;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Store</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;{</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html"> 62</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a>:<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_f_s_directory.html" title=" Base class for Directory implementations that store index files in the file system. There are currently three core subclasses:">FSDirectory</a></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">private</span> <span class="keyword">class </span>AnonymousClassPrivilegedExceptionAction <span class="comment">// : SupportClass.IPriviligedAction // {{Aroush-2.9}}</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">public</span> AnonymousClassPrivilegedExceptionAction(byte[] buffer, <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a> enclosingInstance)</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; InitBlock(buffer, enclosingInstance);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock(byte[] buffer, <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a> enclosingInstance)</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; this.buffer = buffer;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; this.enclosingInstance = enclosingInstance;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; }</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">private</span> byte[] buffer;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keyword">private</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a> enclosingInstance;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a> Enclosing_Instance</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keyword">get</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">return</span> enclosingInstance;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; }</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; }</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">public</span> <span class="keyword">virtual</span> System.Object Run()</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="comment">// {{Aroush-2.9</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="comment"> System.Reflection.MethodInfo getCleanerMethod = buffer.GetType().GetMethod(&quot;cleaner&quot;, (Lucene.Net.Store.MMapDirectory.NO_PARAM_TYPES == null)?new System.Type[0]:(System.Type[]) Lucene.Net.Store.MMapDirectory.NO_PARAM_TYPES);</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;<span class="comment"> getCleanerMethod.SetAccessible(true);</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;<span class="comment"> System.Object cleaner = getCleanerMethod.Invoke(buffer, (System.Object[]) Lucene.Net.Store.MMapDirectory.NO_PARAMS);</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;<span class="comment"> if (cleaner != null)</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;<span class="comment"> {</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;<span class="comment"> cleaner.GetType().GetMethod(&quot;clean&quot;, (Lucene.Net.Store.MMapDirectory.NO_PARAM_TYPES == null)?new System.Type[0]:(System.Type[]) Lucene.Net.Store.MMapDirectory.NO_PARAM_TYPES).Invoke(cleaner, (System.Object[]) Lucene.Net.Store.MMapDirectory.NO_PARAMS);</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="comment"> }</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="comment">//System.Diagnostics.Debug.Fail(&quot;Port issue:&quot;, &quot;sun.misc.Cleaner()&quot;); // {{Aroush-2.9}}</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> NotImplementedException(<span class="stringliteral">&quot;Port issue: sun.misc.Cleaner()&quot;</span>);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="comment">// Aroush-2.9}}</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="comment">//return null; </span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; }</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock()</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; maxBBuf = <a class="code" href="_documents_writer_8cs.html#a4d21c5a1cd18c33bc4f3633bd17d823b">Constants</a>.JRE_IS_64BIT?System.Int32.MaxValue:(256 * 1024 * 1024);</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; </div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#ace2b588ce491beeb9461d7c9afe26440"> 116</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a>(System.IO.DirectoryInfo path, <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_lock_factory.html" title="Base class for Locking implementation. Directory uses instances of this class to implement locking...">LockFactory</a> lockFactory)</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; : base(path, lockFactory)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; InitBlock();</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;</div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#a5ae614a0518d4e247f2ba2bb901434c9"> 128</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a>(System.IO.DirectoryInfo path)</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; : base(path, null)</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; InitBlock();</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> useUnmapHack = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> maxBBuf;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; </div>
<div class="line"><a name="l00138"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#af4873ed3df417f1c01dc3e3ca05386fb"> 138</a></span>&#160; <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#af4873ed3df417f1c01dc3e3ca05386fb" title="true, if this platform supports unmapping mmaped files.">UNMAP_SUPPORTED</a>;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">bool</span> UseUnmap</div>
<div class="line"><a name="l00153"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#a30ad4d157e6a9d157f53e027fd9daac9"> 153</a></span>&#160; {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> useUnmapHack; }</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keyword">set</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordflow">if</span> (value &amp;&amp; !UNMAP_SUPPORTED)</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.ArgumentException(<span class="stringliteral">&quot;Unmap hack not supported on this platform!&quot;</span>);</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; this.useUnmapHack = value;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; }</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">void</span> CleanMapping(System.IO.MemoryStream buffer)</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="keywordflow">if</span> (useUnmapHack)</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="comment">// {{Aroush-2.9}} Not converted: java.security.AccessController.doPrivileged()</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="comment">//System.Diagnostics.Debug.Fail(&quot;Port issue:&quot;, &quot;java.security.AccessController.doPrivileged()&quot;); // {{Aroush-2.9}}</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> NotImplementedException(<span class="stringliteral">&quot;Port issue: java.security.AccessController.doPrivileged()&quot;</span>);</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <span class="comment">// AccessController.DoPrivileged(new AnonymousClassPrivilegedExceptionAction(buffer, this));</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; <span class="keywordflow">catch</span> (System.Exception e)</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; {</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; System.IO.IOException ioe = <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;unable to unmap the mapped buffer&quot;</span>, e.InnerException);</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="keywordflow">throw</span> ioe;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; }</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; }</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> MaxChunkSize</div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#a2d37be4664c6dd0ac070ae271b76d736"> 197</a></span>&#160; {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> maxBBuf; }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="keyword">set</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; <span class="keywordflow">if</span> (value &lt;= 0)</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.ArgumentException(<span class="stringliteral">&quot;Maximum chunk size for mmap must be &gt;0&quot;</span>);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; this.maxBBuf = value;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keyword">private</span> <span class="keyword">class </span>MMapIndexInput : <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_input.html" title="Abstract base class for input from a file in a Directory. A random-access input stream. Used for all Lucene index input operations. ">IndexInput</a></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; {</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock(<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a> enclosingInstance)</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; this.enclosingInstance = enclosingInstance;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; }</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <span class="keyword">private</span> MMapDirectory enclosingInstance;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="keyword">public</span> MMapDirectory Enclosing_Instance</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="keyword">get</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; {</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="keywordflow">return</span> enclosingInstance;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; }</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; }</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="keyword">private</span> System.IO.MemoryStream buffer;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="keyword">private</span> <span class="keywordtype">long</span> length;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isClone;</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="keyword">internal</span> MMapIndexInput(MMapDirectory enclosingInstance, System.IO.FileStream raf)</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; {</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; byte[] data = <span class="keyword">new</span> byte[raf.Length];</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; raf.Read(data, 0, (<span class="keywordtype">int</span>) raf.Length);</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; InitBlock(enclosingInstance);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; this.length = raf.Length;</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; this.buffer = <span class="keyword">new</span> System.IO.MemoryStream(data);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; }</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> byte ReadByte()</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; {</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="keywordflow">return</span> (byte) buffer.ReadByte();</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; }</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="keywordflow">catch</span> (ObjectDisposedException)</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;read past EOF&quot;</span>);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; }</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> ReadBytes(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> len)</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; {</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; {</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; buffer.Read(b, offset, len);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="keywordflow">catch</span> (ObjectDisposedException)</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; {</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;read past EOF&quot;</span>);</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; }</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; }</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> FilePointer</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; {</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="keyword">get</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; {</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordflow">return</span> buffer.Position;</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; }</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; }</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Seek(<span class="keywordtype">long</span> pos)</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; {</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; buffer.Seek(pos, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length()</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; {</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; <span class="keywordflow">return</span> length;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; }</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> System.Object Clone()</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; {</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; <span class="keywordflow">if</span> (buffer == null)</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> <a class="code" href="_documents_writer_8cs.html#a3bd6418bcbeb676f7dad24a00a2d6903">AlreadyClosedException</a>(<span class="stringliteral">&quot;MMapIndexInput already closed&quot;</span>);</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; MMapIndexInput clone = (MMapIndexInput) base.Clone();</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; clone.isClone = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; <span class="comment">// clone.buffer = buffer.duplicate(); // {{Aroush-1.9}}</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; <span class="keywordflow">return</span> clone;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; }</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> isDisposing)</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160;</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; <span class="keywordflow">if</span> (isDisposing)</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; {</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; <span class="keywordflow">if</span> (isClone || buffer == null)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="comment">// unmap the buffer (if enabled) and at least unset it for GC</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; {</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; Enclosing_Instance.CleanMapping(buffer);</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; }</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; {</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; buffer = null;</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160;</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; }</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; <span class="comment">// Because Java&#39;s ByteBuffer uses an int to address the</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; <span class="comment">// values, it&#39;s necessary to access a file &gt;</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="comment">// Integer.MAX_VALUE in size using multiple byte buffers.</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">class </span>MultiMMapIndexInput:<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>, System.ICloneable</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; {</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> InitBlock(MMapDirectory enclosingInstance)</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; {</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; this.enclosingInstance = enclosingInstance;</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; }</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; <span class="keyword">private</span> MMapDirectory enclosingInstance;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <span class="keyword">public</span> MMapDirectory Enclosing_Instance</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; {</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; <span class="keyword">get</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; {</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; <span class="keywordflow">return</span> enclosingInstance;</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; }</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160; }</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; </div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <span class="keyword">private</span> System.IO.MemoryStream[] buffers;</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span>[] bufSizes; <span class="comment">// keep here, ByteBuffer.size() method is optional</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; <span class="keyword">private</span> <span class="keywordtype">long</span> length;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isDisposed;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> curBufIndex;</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> maxBufSize;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; <span class="keyword">private</span> System.IO.MemoryStream curBuf; <span class="comment">// redundant for speed: buffers[curBufIndex]</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; <span class="keyword">private</span> <span class="keywordtype">int</span> curAvail; <span class="comment">// redundant for speed: (bufSizes[curBufIndex] - curBuf.position())</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160; </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> isClone = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160; <span class="keyword">public</span> MultiMMapIndexInput(MMapDirectory enclosingInstance, System.IO.FileStream raf, <span class="keywordtype">int</span> maxBufSize)</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; {</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; InitBlock(enclosingInstance);</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; this.length = raf.Length;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; this.maxBufSize = maxBufSize;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; </div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160; <span class="keywordflow">if</span> (maxBufSize &lt;= 0)</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.ArgumentException(<span class="stringliteral">&quot;Non positive maxBufSize: &quot;</span> + maxBufSize);</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>&#160; </div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>&#160; <span class="keywordflow">if</span> ((length / maxBufSize) &gt; System.Int32.MaxValue)</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>&#160; {</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.ArgumentException(<span class="stringliteral">&quot;RandomAccessFile too big for maximum buffer size: &quot;</span> + raf.ToString());</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>&#160; }</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>&#160; </div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>&#160; <span class="keywordtype">int</span> nrBuffers = (int) (length / maxBufSize);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>&#160; <span class="keywordflow">if</span> (((<span class="keywordtype">long</span>) nrBuffers * maxBufSize) &lt; length)</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>&#160; nrBuffers++;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>&#160; </div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>&#160; this.buffers = <span class="keyword">new</span> System.IO.MemoryStream[nrBuffers];</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>&#160; this.bufSizes = <span class="keyword">new</span> <span class="keywordtype">int</span>[nrBuffers];</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>&#160; </div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>&#160; <span class="keywordtype">long</span> bufferStart = 0;</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>&#160; System.IO.FileStream rafc = raf;</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> bufNr = 0; bufNr &lt; nrBuffers; bufNr++)</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>&#160; {</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>&#160; byte[] data = <span class="keyword">new</span> byte[rafc.Length];</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>&#160; raf.Read(data, 0, (<span class="keywordtype">int</span>) rafc.Length);</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>&#160;</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>&#160; <span class="keywordtype">int</span> bufSize = (length &gt; (bufferStart + maxBufSize))?maxBufSize:(int) (length - bufferStart);</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>&#160; this.buffers[bufNr] = <span class="keyword">new</span> System.IO.MemoryStream(data);</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>&#160; this.bufSizes[bufNr] = bufSize;</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>&#160; bufferStart += bufSize;</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>&#160; }</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>&#160; Seek(0L);</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>&#160; }</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>&#160; </div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> byte ReadByte()</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>&#160; {</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>&#160; <span class="comment">// Performance might be improved by reading ahead into an array of</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>&#160; <span class="comment">// e.g. 128 bytes and readByte() from there.</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>&#160; <span class="keywordflow">if</span> (curAvail == 0)</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>&#160; {</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>&#160; curBufIndex++;</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>&#160; <span class="keywordflow">if</span> (curBufIndex &gt;= buffers.Length)</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;read past EOF&quot;</span>);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>&#160; curBuf = buffers[curBufIndex];</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>&#160; curBuf.Seek(0, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>&#160; curAvail = bufSizes[curBufIndex];</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>&#160; }</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>&#160; curAvail--;</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>&#160; <span class="keywordflow">return</span> (byte) curBuf.ReadByte();</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>&#160; }</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>&#160; </div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> ReadBytes(byte[] b, <span class="keywordtype">int</span> offset, <span class="keywordtype">int</span> len)</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>&#160; {</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>&#160; <span class="keywordflow">while</span> (len &gt; curAvail)</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>&#160; {</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>&#160; curBuf.Read(b, offset, curAvail);</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>&#160; len -= curAvail;</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>&#160; offset += curAvail;</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>&#160; curBufIndex++;</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>&#160; <span class="keywordflow">if</span> (curBufIndex &gt;= buffers.Length)</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;read past EOF&quot;</span>);</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>&#160; curBuf = buffers[curBufIndex];</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>&#160; curBuf.Seek(0, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>&#160; curAvail = bufSizes[curBufIndex];</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>&#160; }</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>&#160; curBuf.Read(b, offset, len);</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>&#160; curAvail -= len;</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>&#160; }</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>&#160;</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> FilePointer</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>&#160; {</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> ((<span class="keywordtype">long</span>) curBufIndex*maxBufSize) + curBuf.Position; }</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>&#160; }</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>&#160;</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Seek(<span class="keywordtype">long</span> pos)</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>&#160; {</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>&#160; curBufIndex = (int) (pos / maxBufSize);</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>&#160; curBuf = buffers[curBufIndex];</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>&#160; <span class="keywordtype">int</span> bufOffset = (int) (pos - ((<span class="keywordtype">long</span>) curBufIndex * maxBufSize));</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>&#160; curBuf.Seek(bufOffset, System.IO.SeekOrigin.Begin);</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&#160; curAvail = bufSizes[curBufIndex] - bufOffset;</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>&#160; }</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>&#160; </div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Length()</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>&#160; {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>&#160; <span class="keywordflow">return</span> length;</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>&#160; }</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>&#160; </div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> System.Object Clone()</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>&#160; {</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>&#160; MultiMMapIndexInput clone = (MultiMMapIndexInput) base.Clone();</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>&#160; clone.isClone = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>&#160; clone.buffers = <span class="keyword">new</span> System.IO.MemoryStream[buffers.Length];</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>&#160; <span class="comment">// No need to clone bufSizes.</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>&#160; <span class="comment">// Since most clones will use only one buffer, duplicate() could also be</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>&#160; <span class="comment">// done lazy in clones, e.g. when adapting curBuf.</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> bufNr = 0; bufNr &lt; buffers.Length; bufNr++)</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>&#160; {</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>&#160; clone.buffers[bufNr] = buffers[bufNr]; <span class="comment">// clone.buffers[bufNr] = buffers[bufNr].duplicate(); // {{Aroush-1.9}} how do we clone?!</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>&#160; }</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>&#160; {</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>&#160; clone.Seek(FilePointer);</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>&#160; }</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>&#160; <span class="keywordflow">catch</span> (System.IO.IOException ioe)</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>&#160; {</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>&#160; System.SystemException newException = <span class="keyword">new</span> System.SystemException(ioe.Message, ioe);</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>&#160; <span class="keywordflow">throw</span> newException;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>&#160; }</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>&#160; <span class="keywordflow">return</span> clone;</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>&#160; }</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>&#160;</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>&#160; <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>&#160; {</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>&#160; <span class="keywordflow">if</span> (isDisposed) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>&#160; <span class="keywordflow">if</span> (isClone || buffers == null)</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>&#160; <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>&#160; {</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> bufNr = 0; bufNr &lt; buffers.Length; bufNr++)</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>&#160; {</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>&#160; <span class="comment">// unmap the buffer (if enabled) and at least unset it for GC</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>&#160; {</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>&#160; Enclosing_Instance.CleanMapping(buffers[bufNr]);</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>&#160; }</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>&#160; {</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>&#160; buffers[bufNr] = null;</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>&#160; }</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>&#160; }</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>&#160; }</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>&#160; {</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>&#160; buffers = null;</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>&#160; }</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>&#160; isDisposed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>&#160; }</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>&#160; }</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>&#160; </div>
<div class="line"><a name="l00490"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#ac56071555f9bc3b4948bd2c396952378"> 490</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_input.html" title="Abstract base class for input from a file in a Directory. A random-access input stream. Used for all Lucene index input operations. ">IndexInput</a> OpenInput(System.String name, <span class="keywordtype">int</span> bufferSize)</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>&#160; {</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>&#160; EnsureOpen();</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>&#160; System.String path = System.IO.Path.Combine(<a class="code" href="class_lucene_1_1_net_1_1_store_1_1_directory.html" title="A Directory is a flat list of files. Files may be written once, when they are created. Once a file is created it may only be opened for read, or deleted. Random access is permitted both when reading and writing.">Directory</a>.FullName, name);</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>&#160; System.IO.FileStream raf = <span class="keyword">new</span> System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read);</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>&#160; {</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>&#160; <span class="keywordflow">return</span> (raf.Length &lt;= (<span class="keywordtype">long</span>) maxBBuf)?(<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>) <span class="keyword">new</span> MMapIndexInput(<span class="keyword">this</span>, raf):(<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a>) <span class="keyword">new</span> MultiMMapIndexInput(<span class="keyword">this</span>, raf, maxBBuf);</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>&#160; }</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>&#160; {</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>&#160; raf.Close();</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>&#160; }</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>&#160; }</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>&#160; </div>
<div class="line"><a name="l00506"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html#ad420384aa67b5b39141ac46f754f21a9"> 506</a></span>&#160; <span class="keyword">public</span> <span class="keyword">override</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_index_output.html" title="Abstract base class for output to a file in a Directory. A random-access output stream. Used for all Lucene index output operations. ">IndexOutput</a> CreateOutput(System.String name)</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>&#160; {</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>&#160; InitOutput(name);</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>&#160; <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_simple_f_s_directory.html" title="A straightforward implementation of FSDirectory using java.io.RandomAccessFile. However, this class has poor concurrent performance (multiple threads will bottleneck) as it synchronizes when multiple threads read from the same file. It&#39;s usually better to use NIOFSDirectory or MMapDirectory instead. ">SimpleFSDirectory</a>.SimpleFSIndexOutput(<span class="keyword">new</span> System.IO.FileInfo(System.IO.Path.Combine(internalDirectory.FullName, name)));</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>&#160; }</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>&#160; <span class="keyword">static</span> <a class="code" href="class_lucene_1_1_net_1_1_store_1_1_m_map_directory.html" title="File-based Directory implementation that uses mmap for reading, and SimpleFSDirectory.SimpleFSIndexOutput for writing.">MMapDirectory</a>()</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>&#160; {</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>&#160; {</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>&#160; <span class="keywordtype">bool</span> v;</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>&#160; {</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>&#160; <span class="comment">// {{Aroush-2.9</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>&#160; <span class="comment">/*</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>&#160;<span class="comment"> System.Type.GetType(&quot;sun.misc.Cleaner&quot;); // {{Aroush-2.9}} port issue?</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>&#160;<span class="comment"> System.Type.GetType(&quot;java.nio.DirectByteBuffer&quot;).GetMethod(&quot;cleaner&quot;, (NO_PARAM_TYPES == null)?new System.Type[0]:(System.Type[]) NO_PARAM_TYPES);</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>&#160; <span class="comment">//System.Diagnostics.Debug.Fail(&quot;Port issue:&quot;, &quot;sun.misc.Cleaner.clean()&quot;); // {{Aroush-2.9}}</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> NotImplementedException(<span class="stringliteral">&quot;Port issue: sun.misc.Cleaner.clean()&quot;</span>);</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>&#160; <span class="comment">// Aroush-2.9}}</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>&#160; <span class="comment">//v = true;</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>&#160; }</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>&#160; <span class="keywordflow">catch</span> (System.Exception)</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>&#160; {</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>&#160; v = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>&#160; }</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>&#160; UNMAP_SUPPORTED = v;</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>&#160; }</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>&#160; }</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>&#160; }</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>&#160;}</div>
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