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<h1>dox/Common/vtkMultiThreader.h</h1><a href="a02077.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*=========================================================================</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment">  Program:   Visualization Toolkit</span>
<a name="l00004"></a>00004 <span class="comment">  Module:    $RCSfile: vtkMultiThreader.h,v $</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment">  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen</span>
<a name="l00007"></a>00007 <span class="comment">  All rights reserved.</span>
<a name="l00008"></a>00008 <span class="comment">  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment">     This software is distributed WITHOUT ANY WARRANTY; without even</span>
<a name="l00011"></a>00011 <span class="comment">     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR</span>
<a name="l00012"></a>00012 <span class="comment">     PURPOSE.  See the above copyright notice for more information.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">=========================================================================*/</span>
<a name="l00027"></a>00027 <span class="preprocessor">#ifndef __vtkMultiThreader_h</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#define __vtkMultiThreader_h</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="a02079.html">vtkObject.h</a>"</span>
<a name="l00031"></a>00031 
<a name="l00032"></a>00032 <span class="preprocessor">#ifdef VTK_USE_SPROC</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#include &lt;sys/types.h&gt;</span> <span class="comment">// Needed for unix implementation of sproc</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include &lt;unistd.h&gt;</span> <span class="comment">// Needed for unix implementation of sproc</span>
<a name="l00035"></a>00035 <span class="preprocessor">#endif</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a>00037 <span class="preprocessor">#if defined(VTK_USE_PTHREADS) || defined(VTK_HP_PTHREADS)</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#include &lt;pthread.h&gt;</span> <span class="comment">// Needed for PTHREAD implementation of mutex</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include &lt;sys/types.h&gt;</span> <span class="comment">// Needed for unix implementation of pthreads</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;unistd.h&gt;</span> <span class="comment">// Needed for unix implementation of pthreads</span>
<a name="l00041"></a>00041 <span class="preprocessor">#endif</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>
<a name="l00043"></a>00043 <span class="comment">// If VTK_USE_SPROC is defined, then sproc() will be used to create</span>
<a name="l00044"></a>00044 <span class="comment">// multiple threads on an SGI. If VTK_USE_PTHREADS is defined, then</span>
<a name="l00045"></a>00045 <span class="comment">// pthread_create() will be used to create multiple threads (on</span>
<a name="l00046"></a>00046 <span class="comment">// a sun, for example)</span>
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 <span class="comment">// Defined in vtkSystemIncludes.h:</span>
<a name="l00049"></a>00049 <span class="comment">//   VTK_MAX_THREADS</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="comment">// If VTK_USE_PTHREADS is defined, then the multithreaded</span>
<a name="l00052"></a>00052 <span class="comment">// function is of type void *, and returns NULL</span>
<a name="l00053"></a>00053 <span class="comment">// Otherwise the type is void which is correct for WIN32</span>
<a name="l00054"></a>00054 <span class="comment">// and SPROC</span>
<a name="l00055"></a>00055 <span class="comment">//BTX</span>
<a name="l00056"></a>00056 <span class="preprocessor">#ifdef VTK_USE_SPROC</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">int</span> <a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">vtkThreadProcessIDType</a>;
<a name="l00058"></a>00058 <span class="keyword">typedef</span> <span class="keywordtype">int</span> <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a>;
<a name="l00059"></a>00059 <span class="preprocessor">#endif</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span>
<a name="l00061"></a>00061 <span class="comment">// Defined in vtkSystemIncludes.h:</span>
<a name="l00062"></a>00062 <span class="comment">//   VTK_THREAD_RETURN_VALUE</span>
<a name="l00063"></a>00063 <span class="comment">//   VTK_THREAD_RETURN_TYPE</span>
<a name="l00064"></a>00064 
<a name="l00065"></a>00065 <span class="preprocessor">#ifdef VTK_USE_PTHREADS</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keywordtype">void</span> *(*vtkThreadFunctionType)(<span class="keywordtype">void</span> *);
<a name="l00067"></a>00067 <span class="keyword">typedef</span> pthread_t <a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">vtkThreadProcessIDType</a>;
<a name="l00068"></a>00068 <span class="comment">// #define VTK_THREAD_RETURN_VALUE  NULL</span>
<a name="l00069"></a>00069 <span class="comment">// #define VTK_THREAD_RETURN_TYPE   void *</span>
<a name="l00070"></a>00070 <span class="keyword">typedef</span> pthread_t <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a>;
<a name="l00071"></a>00071 <span class="preprocessor">#endif</span>
<a name="l00072"></a>00072 <span class="preprocessor"></span>
<a name="l00073"></a>00073 <span class="preprocessor">#ifdef VTK_USE_WIN32_THREADS</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span><span class="keyword">typedef</span> vtkWindowsLPTHREAD_START_ROUTINE <a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>;
<a name="l00075"></a>00075 <span class="keyword">typedef</span> vtkWindowsHANDLE <a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">vtkThreadProcessIDType</a>;
<a name="l00076"></a>00076 <span class="comment">// #define VTK_THREAD_RETURN_VALUE 0</span>
<a name="l00077"></a>00077 <span class="comment">// #define VTK_THREAD_RETURN_TYPE DWORD __stdcall</span>
<a name="l00078"></a>00078 <span class="keyword">typedef</span> vtkWindowsDWORD <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a>;
<a name="l00079"></a>00079 <span class="preprocessor">#endif</span>
<a name="l00080"></a>00080 <span class="preprocessor"></span>
<a name="l00081"></a>00081 <span class="preprocessor">#if !defined(VTK_USE_PTHREADS) &amp;&amp; !defined(VTK_USE_WIN32_THREADS)</span>
<a name="l00082"></a><a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">00082</a> <span class="preprocessor"></span><span class="keyword">typedef</span> void (*<a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>)(<span class="keywordtype">void</span> *);
<a name="l00083"></a><a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">00083</a> <span class="keyword">typedef</span> <span class="keywordtype">int</span> <a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">vtkThreadProcessIDType</a>;
<a name="l00084"></a>00084 <span class="comment">// #define VTK_THREAD_RETURN_VALUE</span>
<a name="l00085"></a>00085 <span class="comment">// #define VTK_THREAD_RETURN_TYPE void</span>
<a name="l00086"></a><a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">00086</a> <span class="keyword">typedef</span> <span class="keywordtype">int</span> <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a>;
<a name="l00087"></a>00087 <span class="preprocessor">#endif</span>
<a name="l00088"></a>00088 <span class="preprocessor"></span><span class="comment">//ETX</span>
<a name="l00089"></a>00089 
<a name="l00090"></a>00090 <span class="keyword">class </span><a class="code" href="a01074.html" title="mutual exclusion locking class">vtkMutexLock</a>;
<a name="l00091"></a>00091 
<a name="l00092"></a><a class="code" href="a01064.html">00092</a> <span class="keyword">class </span><a class="code" href="a02170.html#873ca0b83d0838a1df577536068a1730">VTK_COMMON_EXPORT</a> <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a> : <span class="keyword">public</span> <a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a> 
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <span class="keyword">public</span>:
<a name="l00095"></a>00095   <span class="keyword">static</span> <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a> *<a class="code" href="a01084.html#4d5b227267c076d6f9e38483370b6612">New</a>();
<a name="l00096"></a>00096 
<a name="l00097"></a><a class="code" href="a01064.html#e8f0f7305a9c9a2889650925e114e6ef">00097</a>   vtkTypeRevisionMacro(<a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>,<a class="code" href="a01084.html" title="abstract base class for most VTK objects">vtkObject</a>);
<a name="l00098"></a>00098   <span class="keywordtype">void</span> <a class="code" href="a01084.html#bf3dbb4154289b56a12483eee3866263">PrintSelf</a>(ostream&amp; os, <a class="code" href="a00869.html" title="a simple class to control print indentation">vtkIndent</a> indent);
<a name="l00099"></a>00099 
<a name="l00111"></a>00111   <span class="comment">//BTX</span>
<a name="l00112"></a><a class="code" href="a02077.html#975272f39ace1821fd3c61acdb0823ed">00112</a> <span class="preprocessor">#define ThreadInfoStruct vtkMultiThreader::ThreadInfo</span>
<a name="l00113"></a><a class="code" href="a01065.html">00113</a> <span class="preprocessor"></span>  <span class="keyword">class </span><a class="code" href="a01065.html">ThreadInfo</a>
<a name="l00114"></a>00114   {
<a name="l00115"></a>00115   <span class="keyword">public</span>:
<a name="l00116"></a><a class="code" href="a01065.html#16dfffdcd339b90af11df0069a1436be">00116</a>     <span class="keywordtype">int</span>                 ThreadID;
<a name="l00117"></a><a class="code" href="a01065.html#ae744824cb562d2bb79a913bb9f756e1">00117</a>     <span class="keywordtype">int</span>                 NumberOfThreads;
<a name="l00118"></a><a class="code" href="a01065.html#0ea9e62bef591e81fa055a38ddeff808">00118</a>     <span class="keywordtype">int</span>                 *ActiveFlag;
<a name="l00119"></a><a class="code" href="a01065.html#add5e8b17547ddbdbac7e0acd4d9e762">00119</a>     <a class="code" href="a01074.html" title="mutual exclusion locking class">vtkMutexLock</a>        *ActiveFlagLock;
<a name="l00120"></a><a class="code" href="a01065.html#3d080567042d762e9d3d2b6fa068de23">00120</a>     <span class="keywordtype">void</span>                *UserData;
<a name="l00121"></a>00121   };
<a name="l00122"></a>00122   <span class="comment">//ETX</span>
<a name="l00123"></a>00123 
<a name="l00125"></a>00125 
<a name="l00128"></a>00128   vtkSetClampMacro( NumberOfThreads, <span class="keywordtype">int</span>, 1, <a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a> );
<a name="l00129"></a>00129   <span class="keyword">virtual</span> <span class="keywordtype">int</span> GetNumberOfThreads();
<a name="l00131"></a>00131 
<a name="l00133"></a>00133 
<a name="l00136"></a>00136   <span class="keyword">static</span> <span class="keywordtype">void</span> SetGlobalMaximumNumberOfThreads(<span class="keywordtype">int</span> val);
<a name="l00137"></a>00137   <span class="keyword">static</span> <span class="keywordtype">int</span>  GetGlobalMaximumNumberOfThreads();
<a name="l00139"></a>00139 
<a name="l00141"></a>00141 
<a name="l00144"></a>00144   <span class="keyword">static</span> <span class="keywordtype">void</span> SetGlobalDefaultNumberOfThreads(<span class="keywordtype">int</span> val);
<a name="l00145"></a>00145   <span class="keyword">static</span> <span class="keywordtype">int</span>  GetGlobalDefaultNumberOfThreads();
<a name="l00147"></a>00147 
<a name="l00148"></a>00148   <span class="comment">// These methods are excluded from Tcl wrapping 1) because the</span>
<a name="l00149"></a>00149   <span class="comment">// wrapper gives up on them and 2) because they really shouldn't be</span>
<a name="l00150"></a>00150   <span class="comment">// called from a script anyway.</span>
<a name="l00151"></a>00151   <span class="comment">//BTX </span>
<a name="l00152"></a>00152   
<a name="l00155"></a>00155   <span class="keywordtype">void</span> SingleMethodExecute();
<a name="l00156"></a>00156 
<a name="l00160"></a>00160   <span class="keywordtype">void</span> MultipleMethodExecute();
<a name="l00161"></a>00161   
<a name="l00166"></a>00166   <span class="keywordtype">void</span> SetSingleMethod(<a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>, <span class="keywordtype">void</span> *<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210eb708a412c0730a6b5f3215b36474a1e">data</a> );
<a name="l00167"></a>00167  
<a name="l00170"></a>00170   <span class="keywordtype">void</span> SetMultipleMethod( <span class="keywordtype">int</span> <a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210e519c5019582479480124c44722a451f">index</a>, <a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>, <span class="keywordtype">void</span> *<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210eb708a412c0730a6b5f3215b36474a1e">data</a> ); 
<a name="l00171"></a>00171 
<a name="l00175"></a>00175   <span class="keywordtype">int</span> SpawnThread( <a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>, <span class="keywordtype">void</span> *<a class="code" href="a03761.html#c6551f7bf833e8254b2b3ecdaea0d210eb708a412c0730a6b5f3215b36474a1e">data</a> );
<a name="l00176"></a>00176 
<a name="l00178"></a>00178   <span class="keywordtype">void</span> TerminateThread( <span class="keywordtype">int</span> thread_id );
<a name="l00179"></a>00179 
<a name="l00181"></a>00181   <span class="keywordtype">int</span> IsThreadActive( <span class="keywordtype">int</span> threadID );
<a name="l00182"></a>00182   
<a name="l00184"></a>00184   <span class="keyword">static</span> <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a> GetCurrentThreadID();
<a name="l00185"></a>00185 
<a name="l00187"></a>00187 
<a name="l00188"></a>00188   <span class="keyword">static</span> <span class="keywordtype">int</span> ThreadsEqual(<a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a> t1,
<a name="l00189"></a>00189                           <a class="code" href="a02077.html#0138e0597dfcd71eb7636901c96e27e4">vtkMultiThreaderIDType</a> t2);
<a name="l00191"></a>00191 
<a name="l00192"></a>00192 <span class="keyword">protected</span>:
<a name="l00193"></a>00193   <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>();
<a name="l00194"></a>00194   ~<a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>();
<a name="l00195"></a>00195 
<a name="l00196"></a>00196   <span class="comment">// The number of threads to use</span>
<a name="l00197"></a><a class="code" href="a01064.html#d937f844da5781fd31e8bd6bf8adc72a">00197</a>   <span class="keywordtype">int</span>                        NumberOfThreads;
<a name="l00198"></a>00198 
<a name="l00199"></a>00199   <span class="comment">// An array of thread info containing a thread id</span>
<a name="l00200"></a>00200   <span class="comment">// (0, 1, 2, .. VTK_MAX_THREADS-1), the thread count, and a pointer</span>
<a name="l00201"></a>00201   <span class="comment">// to void so that user data can be passed to each thread</span>
<a name="l00202"></a><a class="code" href="a01064.html#1494a3fe0502f5e5cb97a512cf2f55ac">00202</a>   <a class="code" href="a01065.html">ThreadInfo</a>                 ThreadInfoArray[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00203"></a>00203 
<a name="l00204"></a>00204   <span class="comment">// The methods</span>
<a name="l00205"></a><a class="code" href="a01064.html#485669763015dd87577a05aea89f26fb">00205</a>   <a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>      SingleMethod;
<a name="l00206"></a><a class="code" href="a01064.html#c9f7d6eb0b4cca2cca5ffd5361c1a1f8">00206</a>   <a class="code" href="a02077.html#1a4a360ecf4efc17d1e2ea057636ec48">vtkThreadFunctionType</a>      MultipleMethod[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00207"></a>00207 
<a name="l00208"></a>00208   <span class="comment">// Storage of MutexFunctions and ints used to control spawned </span>
<a name="l00209"></a>00209   <span class="comment">// threads and the spawned thread ids</span>
<a name="l00210"></a><a class="code" href="a01064.html#d98bba7b07f6a58adaab356af8cc9ee6">00210</a>   <span class="keywordtype">int</span>                        SpawnedThreadActiveFlag[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00211"></a><a class="code" href="a01064.html#7f0fe59d3d88ba2b558b45754af7a61c">00211</a>   <a class="code" href="a01074.html" title="mutual exclusion locking class">vtkMutexLock</a>               *SpawnedThreadActiveFlagLock[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00212"></a><a class="code" href="a01064.html#0b19e5f8dfbb066855854f4268537818">00212</a>   <a class="code" href="a02077.html#7eb266a71ebc6d86a0b1d57d021f0b21">vtkThreadProcessIDType</a>     SpawnedThreadProcessID[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00213"></a><a class="code" href="a01064.html#e06117c3bf5a8aa81c72d288be6e211f">00213</a>   <a class="code" href="a01065.html">ThreadInfo</a>                 SpawnedThreadInfoArray[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00214"></a>00214 
<a name="l00215"></a>00215 <span class="comment">//ETX</span>
<a name="l00216"></a>00216 
<a name="l00217"></a>00217   <span class="comment">// Internal storage of the data</span>
<a name="l00218"></a><a class="code" href="a01064.html#89874000b4c1932e098a7291de1c4a20">00218</a>   <span class="keywordtype">void</span>                       *SingleData;
<a name="l00219"></a><a class="code" href="a01064.html#e116d6f211bd6e2356996f3f01a55829">00219</a>   <span class="keywordtype">void</span>                       *MultipleData[<a class="code" href="a02139.html#804fbb60e0f29e0e0a3d5706c85ef921">VTK_MAX_THREADS</a>];
<a name="l00220"></a>00220 
<a name="l00221"></a>00221 <span class="keyword">private</span>:
<a name="l00222"></a>00222   <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>(<span class="keyword">const</span> <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>&amp;);  <span class="comment">// Not implemented.</span>
<a name="l00223"></a>00223   <span class="keywordtype">void</span> operator=(<span class="keyword">const</span> <a class="code" href="a01064.html" title="A class for performing multithreaded execution.">vtkMultiThreader</a>&amp;);  <span class="comment">// Not implemented.</span>
<a name="l00224"></a>00224 };
<a name="l00225"></a>00225 
<a name="l00226"></a>00226 <span class="preprocessor">#endif</span>
<a name="l00227"></a>00227 <span class="preprocessor"></span>
<a name="l00228"></a>00228 
<a name="l00229"></a>00229 
<a name="l00230"></a>00230 
<a name="l00231"></a>00231 
</pre></div></div>
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