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<h2><a name="content"></a>libkdepim</h2>
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<h1>weaver.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- C++ -*-</span>
<a name="l00002"></a>00002 <span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment"> This file implements the Weaver, Job and Thread classes.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> $ Author: Mirko Boehm $</span>
<a name="l00006"></a>00006 <span class="comment"> $ Copyright: (C) 2004, Mirko Boehm $</span>
<a name="l00007"></a>00007 <span class="comment"> $ Contact: mirko@kde.org</span>
<a name="l00008"></a>00008 <span class="comment"> http://www.kde.org</span>
<a name="l00009"></a>00009 <span class="comment"> http://www.hackerbuero.org $</span>
<a name="l00010"></a>00010 <span class="comment"> $ License: LGPL with the following explicit clarification:</span>
<a name="l00011"></a>00011 <span class="comment"> This code may be linked against any version of the Qt toolkit</span>
<a name="l00012"></a>00012 <span class="comment"> from Troll Tech, Norway. $</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">*/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00017"></a>00017 <span class="preprocessor">#include <signal.h></span>
<a name="l00018"></a>00018 }
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#include <qevent.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <qapplication.h></span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "weaver.h"</span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keyword">namespace </span>KPIM {
<a name="l00026"></a>00026 <span class="keyword">namespace </span>ThreadWeaver {
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keywordtype">bool</span> Debug = <span class="keyword">true</span>;
<a name="l00029"></a>00029 <span class="keywordtype">int</span> DebugLevel = 2;
<a name="l00030"></a>00030
<a name="l00031"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#874a9d6fc036d251a0d6f5f326c7ec11">00031</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#874a9d6fc036d251a0d6f5f326c7ec11" title="Construct a Job object.">Job::Job</a> (QObject* parent, <span class="keyword">const</span> <span class="keywordtype">char</span>* name)
<a name="l00032"></a>00032 : QObject (parent, name),
<a name="l00033"></a>00033 m_finished (false),
<a name="l00034"></a>00034 m_mutex (new QMutex (true) ),
<a name="l00035"></a>00035 m_thread (0)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038
<a name="l00039"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#1b80dd9f9f701faf7371b0f9454a6ff3">00039</a> Job::~Job()
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#6c8282747346502f39392eeb8dc8fa21">00043</a> <span class="keywordtype">void</span> Job::lock()
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 m_mutex->lock();
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#38d69f1cdd1d6af2ce68d9c2fd48a802">00048</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#38d69f1cdd1d6af2ce68d9c2fd48a802" title="Unlock this Job&#39;s mutex.">Job::unlock</a>()
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 m_mutex->unlock();
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00053"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#03cc7b24aafe5207d0a071698d4f64bd">00053</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#03cc7b24aafe5207d0a071698d4f64bd" title="Perform the job.">Job::execute</a>(<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a> *th)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 m_mutex->lock();
<a name="l00056"></a>00056 m_thread = th;
<a name="l00057"></a>00057 m_mutex->unlock();
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#924335cfaa9292b3800944014e723a5a" title="The method that actually performs the job.">run</a> ();
<a name="l00060"></a>00060
<a name="l00061"></a>00061 m_mutex->lock();
<a name="l00062"></a>00062 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#bfab027fbf4cab468c38df3ab4fcbc2e" title="Call with status = true to mark this job as done.">setFinished</a> (<span class="keyword">true</span>);
<a name="l00063"></a>00063 m_thread = 0;
<a name="l00064"></a>00064 m_mutex->unlock();
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fb3f8da44198996b698ca116fb1f77a9">00067</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a> *<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fb3f8da44198996b698ca116fb1f77a9" title="Return the thread that executes this job.">Job::thread</a> ()
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 QMutexLocker l (m_mutex);
<a name="l00070"></a>00070 <span class="keywordflow">return</span> m_thread;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#c091ff3320beb8dcb26a645f9c014c9a">00073</a> <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#c091ff3320beb8dcb26a645f9c014c9a" title="Returns true if the jobs&#39;s execute method finished.">Job::isFinished</a>()<span class="keyword"> const</span>
<a name="l00074"></a>00074 <span class="keyword"> </span>{
<a name="l00075"></a>00075 QMutexLocker l (m_mutex);
<a name="l00076"></a>00076 <span class="keywordflow">return</span> m_finished;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00079"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#bfab027fbf4cab468c38df3ab4fcbc2e">00079</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#bfab027fbf4cab468c38df3ab4fcbc2e" title="Call with status = true to mark this job as done.">Job::setFinished</a>(<span class="keywordtype">bool</span> status)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 QMutexLocker l (m_mutex);
<a name="l00082"></a>00082 m_finished = status;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#9dd6234e536c271e233bb68fb6731449">00085</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#9dd6234e536c271e233bb68fb6731449" title="Process events related to this job (created by the processing thread or the weaver...">Job::processEvent</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html" title="A class to represent the events threads generate and send to the Weaver object.">Event</a> *e)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="keywordflow">switch</span> ( e-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#155d1edcea3f4b14c08905b646e80602" title="The action.">action</a>() )
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keywordflow">case</span> Event::JobStarted:
<a name="l00090"></a>00090 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#b3563a8af66f6d50c3e7eef13c18b3b3" title="This signal is emitted when a thread starts to process a job.">started</a>() );
<a name="l00091"></a>00091 <span class="keywordflow">break</span>;
<a name="l00092"></a>00092 <span class="keywordflow">case</span> Event::JobFinished:
<a name="l00093"></a>00093 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fa42f9bbb5669b5666c85070ba4d9426" title="This signal is emitted when a job has been finished.">done</a>() );
<a name="l00094"></a>00094 <span class="keywordflow">break</span>;
<a name="l00095"></a>00095 <span class="keywordflow">case</span> Event::JobSPR:
<a name="l00096"></a>00096 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#563f82e8575865c11351c69e8a41196b" title="This signal is emitted when the job needs some operation done by the main thread...">SPR</a> () );
<a name="l00097"></a>00097 m_wc->wakeOne ();
<a name="l00098"></a>00098 <span class="keywordflow">break</span>;
<a name="l00099"></a>00099 <span class="keywordflow">case</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219e3af2049f9cdf149ebc5522b0b1c4a8a" title="Synchronous Process Request.">Event::JobAPR</a>:
<a name="l00100"></a>00100 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#a3b49932b24d6dc6b6063388e90a3464" title="Perform an Asynchronous Process Request.">APR</a> () );
<a name="l00101"></a>00101 <span class="comment">// no wake here !</span>
<a name="l00102"></a>00102 <span class="keywordflow">break</span>;
<a name="l00103"></a>00103 <span class="keywordflow">default</span>:
<a name="l00104"></a>00104 <span class="keywordflow">break</span>;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#027450461e5239c8db945d6f88685723">00108</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#027450461e5239c8db945d6f88685723" title="Trigger a SPR.">Job::triggerSPR</a> ()
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 m_mutex->lock ();
<a name="l00111"></a>00111 m_wc = <span class="keyword">new</span> QWaitCondition;
<a name="l00112"></a>00112 m_mutex->unlock ();
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fb3f8da44198996b698ca116fb1f77a9" title="Return the thread that executes this job.">thread</a>()-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> (KPIM::ThreadWeaver::Event::JobSPR, <span class="keyword">this</span>);
<a name="l00115"></a>00115 m_wc->wait ();
<a name="l00116"></a>00116
<a name="l00117"></a>00117 m_mutex->lock ();
<a name="l00118"></a>00118 <span class="keyword">delete</span> m_wc;
<a name="l00119"></a>00119 m_wc = 0;
<a name="l00120"></a>00120 m_mutex->unlock ();
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#a598da4fedc4fe9b5bdf48e5684eb4b4">00123</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#a598da4fedc4fe9b5bdf48e5684eb4b4" title="Trigger an APR.">Job::triggerAPR</a> ()
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 m_mutex->lock ();
<a name="l00126"></a>00126 m_wc = <span class="keyword">new</span> QWaitCondition;
<a name="l00127"></a>00127 m_mutex->unlock ();
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fb3f8da44198996b698ca116fb1f77a9" title="Return the thread that executes this job.">thread</a>()-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219e3af2049f9cdf149ebc5522b0b1c4a8a" title="Synchronous Process Request.">KPIM::ThreadWeaver::Event::JobAPR</a>, <span class="keyword">this</span>);
<a name="l00130"></a>00130 m_wc->wait ();
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#e45201dff3b442dc7475bcec4339dad9">00133</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#e45201dff3b442dc7475bcec4339dad9" title="Wake the thread after an APR has been processed.">Job::wakeAPR</a> ()
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 QMutexLocker l(m_mutex);
<a name="l00136"></a>00136 <span class="keywordflow">if</span> ( m_wc!=0 )
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 m_wc->wakeOne ();
<a name="l00139"></a>00139 <span class="keyword">delete</span> m_wc;
<a name="l00140"></a>00140 m_wc = 0;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keyword">const</span> <span class="keywordtype">int</span> Event::Type = QEvent::User + 1000;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 Event::Event ( Action action, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a> *<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#fb3f8da44198996b698ca116fb1f77a9" title="Return the thread that executes this job.">thread</a>, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a> *job)
<a name="l00147"></a>00147 : QCustomEvent ( type () ),
<a name="l00148"></a>00148 m_action (action),
<a name="l00149"></a>00149 m_thread (thread),
<a name="l00150"></a>00150 m_job (job)
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#4d2fecc43aab6e9b297515360b4d09ee">00154</a> <span class="keywordtype">int</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#4d2fecc43aab6e9b297515360b4d09ee" title="Return the (custom defined) event type.">Event::type</a> ()
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="keywordflow">return</span> Type;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158
<a name="l00159"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#0a8483e7d4197489b07f7f42b43ef4c4">00159</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a>* <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#0a8483e7d4197489b07f7f42b43ef4c4" title="The ID of the sender thread.">Event::thread</a> ()<span class="keyword"> const</span>
<a name="l00160"></a>00160 <span class="keyword"> </span>{
<a name="l00161"></a>00161 <span class="keywordflow">if</span> ( m_thread != 0)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 <span class="keywordflow">return</span> m_thread;
<a name="l00164"></a>00164 } <span class="keywordflow">else</span> {
<a name="l00165"></a>00165 <span class="keywordflow">return</span> 0;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168
<a name="l00169"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#acc29a2113b9d9f42d49e329504d5c93">00169</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#acc29a2113b9d9f42d49e329504d5c93" title="The associated job.">Event::job</a> ()<span class="keyword"> const</span>
<a name="l00170"></a>00170 <span class="keyword"> </span>{
<a name="l00171"></a>00171 <span class="keywordflow">return</span> m_job;
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#155d1edcea3f4b14c08905b646e80602">00174</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219">Event::Action</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#155d1edcea3f4b14c08905b646e80602" title="The action.">Event::action</a> ()<span class="keyword"> const</span>
<a name="l00175"></a>00175 <span class="keyword"> </span>{
<a name="l00176"></a>00176 <span class="keywordflow">return</span> m_action;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Thread::sm_Id;
<a name="l00180"></a>00180
<a name="l00181"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#31e631ae6d49af500c73f5de317e0830">00181</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#31e631ae6d49af500c73f5de317e0830" title="Create a thread.">Thread::Thread</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html" title="A weaver is the manager of worker threads (Thread objects) to which it assigns jobs...">Weaver</a> *parent)
<a name="l00182"></a>00182 : QThread (),
<a name="l00183"></a>00183 m_parent ( parent ),
<a name="l00184"></a>00184 m_id ( makeId() )
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#c0c94012e2d8b176d92bc14588b91469">00188</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#c0c94012e2d8b176d92bc14588b91469" title="The destructor.">Thread::~Thread</a>()
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Thread::makeId()
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 <span class="keyword">static</span> QMutex mutex;
<a name="l00195"></a>00195 QMutexLocker l (&mutex);
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="keywordflow">return</span> ++sm_Id;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199
<a name="l00200"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#429599fda21981785b09c2c3100ce001">00200</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#429599fda21981785b09c2c3100ce001" title="Returns the thread id.">Thread::id</a>()<span class="keyword"> const</span>
<a name="l00201"></a>00201 <span class="keyword"> </span>{
<a name="l00202"></a>00202 <span class="keywordflow">return</span> m_id;
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00205"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#8d7972953a2f94e81127cb7cbb4f659e">00205</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#8d7972953a2f94e81127cb7cbb4f659e" title="Overloaded to execute the assigned job.">Thread::run</a>()
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a> *job = 0;
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219603bbc02d6a89a8e7e866ef540b0eeba" title="Thread queueing halted.">Event::ThreadStarted</a> );
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keywordflow">while</span> (<span class="keyword">true</span>)
<a name="l00212"></a>00212 {
<a name="l00213"></a>00213 debug ( 3, <span class="stringliteral">"Thread::run [%u]: trying to execute the next job.\n"</span>, <span class="keywordtype">id</span>() );
<a name="l00214"></a>00214
<a name="l00215"></a>00215 job = m_parent-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#716fe21beb0c65750f5c0fa990178d25" title="Assign a job to the calling thread.">applyForWork</a> ( <span class="keyword">this</span>, job );
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (job == 0)
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 <span class="keywordflow">break</span>;
<a name="l00220"></a>00220 } <span class="keywordflow">else</span> {
<a name="l00221"></a>00221 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> ( Event::JobStarted, job );
<a name="l00222"></a>00222 job-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html#03cc7b24aafe5207d0a071698d4f64bd" title="Perform the job.">execute</a> (<span class="keyword">this</span>);
<a name="l00223"></a>00223 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> ( Event::JobFinished, job );
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">post</a> ( Event::ThreadExiting );
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229
<a name="l00230"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6">00230</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#a4970687383e115237fb02de469034f6" title="Post an event, will be received and processed by the Weaver.">Thread::post</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219">Event::Action</a> a, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a> *j)
<a name="l00231"></a>00231 {
<a name="l00232"></a>00232 m_parent-><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> ( a, <span class="keyword">this</span>, j);
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="keywordtype">void</span> Thread::msleep(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> msec)
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 QThread::msleep(msec);
<a name="l00238"></a>00238 }
<a name="l00239"></a>00239
<a name="l00240"></a>00240 Weaver::Weaver(QObject* parent, <span class="keyword">const</span> <span class="keywordtype">char</span>* name,
<a name="l00241"></a>00241 <span class="keywordtype">int</span> inventoryMin, <span class="keywordtype">int</span> inventoryMax)
<a name="l00242"></a>00242 : QObject(parent, name),
<a name="l00243"></a>00243 m_active(0),
<a name="l00244"></a>00244 m_inventoryMin(inventoryMin),
<a name="l00245"></a>00245 m_inventoryMax(inventoryMax),
<a name="l00246"></a>00246 m_shuttingDown(false),
<a name="l00247"></a>00247 m_running (false),
<a name="l00248"></a>00248 m_suspend (false),
<a name="l00249"></a>00249 m_mutex ( new QMutex(true) )
<a name="l00250"></a>00250 {
<a name="l00251"></a>00251 lock();
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> count = 0; count < m_inventoryMin; ++count)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#31e631ae6d49af500c73f5de317e0830" title="Create a thread.">Thread</a> *th = <span class="keyword">new</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#31e631ae6d49af500c73f5de317e0830" title="Create a thread.">Thread</a>(<span class="keyword">this</span>);
<a name="l00256"></a>00256 m_inventory.append(th);
<a name="l00257"></a>00257 <span class="comment">// this will idle the thread, waiting for a job</span>
<a name="l00258"></a>00258 th->start();
<a name="l00259"></a>00259
<a name="l00260"></a>00260 emit (threadCreated (th) );
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262
<a name="l00263"></a>00263 unlock();
<a name="l00264"></a>00264 }
<a name="l00265"></a>00265
<a name="l00266"></a>00266 Weaver::~Weaver()
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 lock();
<a name="l00269"></a>00269
<a name="l00270"></a>00270 debug ( 1, <span class="stringliteral">"Weaver dtor: destroying inventory.\n"</span> );
<a name="l00271"></a>00271
<a name="l00272"></a>00272 m_shuttingDown = <span class="keyword">true</span>;
<a name="l00273"></a>00273
<a name="l00274"></a>00274 unlock();
<a name="l00275"></a>00275
<a name="l00276"></a>00276 m_jobAvailable.wakeAll();
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="comment">// problem: Some threads might not be asleep yet, just finding</span>
<a name="l00279"></a>00279 <span class="comment">// out if a job is available. Those threads will suspend</span>
<a name="l00280"></a>00280 <span class="comment">// waiting for their next job (a rare case, but not impossible).</span>
<a name="l00281"></a>00281 <span class="comment">// Therefore, if we encounter a thread that has not exited, we</span>
<a name="l00282"></a>00282 <span class="comment">// have to wake it again (which we do in the following for</span>
<a name="l00283"></a>00283 <span class="comment">// loop).</span>
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="keywordflow">for</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html#31e631ae6d49af500c73f5de317e0830" title="Create a thread.">Thread</a> *th = m_inventory.first(); th; th = m_inventory.next() )
<a name="l00286"></a>00286 {
<a name="l00287"></a>00287 <span class="keywordflow">if</span> ( !th->finished() )
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 m_jobAvailable.wakeAll();
<a name="l00290"></a>00290 th->wait();
<a name="l00291"></a>00291 }
<a name="l00292"></a>00292
<a name="l00293"></a>00293 emit (threadDestroyed (th) );
<a name="l00294"></a>00294 <span class="keyword">delete</span> th;
<a name="l00295"></a>00295
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 m_inventory.clear();
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="keyword">delete</span> m_mutex;
<a name="l00301"></a>00301
<a name="l00302"></a>00302 debug ( 1, <span class="stringliteral">"Weaver dtor: done\n"</span> );
<a name="l00303"></a>00303
<a name="l00304"></a>00304 }
<a name="l00305"></a>00305
<a name="l00306"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b">00306</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b" title="Lock the mutex for this weaver.">Weaver::lock</a>()
<a name="l00307"></a>00307 {
<a name="l00308"></a>00308 debug ( 3 , <span class="stringliteral">"Weaver::lock: lock (mutex is %s).\n"</span>,
<a name="l00309"></a>00309 ( m_mutex->locked() ? <span class="stringliteral">"locked"</span> : <span class="stringliteral">"not locked"</span> ) );
<a name="l00310"></a>00310 m_mutex->lock();
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00313"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d">00313</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">Weaver::unlock</a>()
<a name="l00314"></a>00314 {
<a name="l00315"></a>00315 m_mutex->unlock();
<a name="l00316"></a>00316
<a name="l00317"></a>00317 debug ( 3 , <span class="stringliteral">"Weaver::unlock: unlock (mutex is %s).\n"</span>,
<a name="l00318"></a>00318 ( m_mutex->locked() ? <span class="stringliteral">"locked"</span> : <span class="stringliteral">"not locked"</span> ) );
<a name="l00319"></a>00319 }
<a name="l00320"></a>00320
<a name="l00321"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#a6be4b2670fefdb0407009a050b1a9b9">00321</a> <span class="keywordtype">int</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#a6be4b2670fefdb0407009a050b1a9b9" title="Returns the current number of threads in the inventory.">Weaver::threads</a> ()<span class="keyword"> const</span>
<a name="l00322"></a>00322 <span class="keyword"> </span>{
<a name="l00323"></a>00323 QMutexLocker l (m_mutex);
<a name="l00324"></a>00324 <span class="keywordflow">return</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#af7fa53f4b80be41238831a923cfb355" title="The thread inventory.">m_inventory</a>.count ();
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326
<a name="l00327"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2a4be318b5d3f5bc44d11c90c716e828">00327</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2a4be318b5d3f5bc44d11c90c716e828" title="Add a job to be executed.">Weaver::enqueue</a>(<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* job)
<a name="l00328"></a>00328 {
<a name="l00329"></a>00329 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b" title="Lock the mutex for this weaver.">lock</a>();
<a name="l00330"></a>00330
<a name="l00331"></a>00331 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.append(job);
<a name="l00332"></a>00332 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#46885facf2d244b1b4fa94e7ccf54174" title="m_running is set to true when a job is enqueued and set to false when the job finishes...">m_running</a> = <span class="keyword">true</span>;
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#1a5453dded29ad5166ec1a3fc227ae80" title="Schedule enqueued jobs to be executed by idle threads.">assignJobs</a>();
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338
<a name="l00339"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#e88b025530e7a8ce333344a27b55b531">00339</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2a4be318b5d3f5bc44d11c90c716e828" title="Add a job to be executed.">Weaver::enqueue</a> (QPtrList <Job> jobs)
<a name="l00340"></a>00340 {
<a name="l00341"></a>00341 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b" title="Lock the mutex for this weaver.">lock</a>();
<a name="l00342"></a>00342
<a name="l00343"></a>00343 <span class="keywordflow">for</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a> * job = jobs.first(); job; job = jobs.next() )
<a name="l00344"></a>00344 {
<a name="l00345"></a>00345 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.append (job);
<a name="l00346"></a>00346 }
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#1a5453dded29ad5166ec1a3fc227ae80" title="Schedule enqueued jobs to be executed by idle threads.">assignJobs</a>();
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#0c79957799c62bc99ec80116fd35de0e">00353</a> <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2651bba7b113bfd33b89340243669fac" title="Remove all queued jobs.">Weaver::dequeue</a> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* job )
<a name="l00354"></a>00354 {
<a name="l00355"></a>00355 QMutexLocker l (m_mutex);
<a name="l00356"></a>00356 <span class="keywordflow">return</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.remove (job);
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358
<a name="l00359"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2651bba7b113bfd33b89340243669fac">00359</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2651bba7b113bfd33b89340243669fac" title="Remove all queued jobs.">Weaver::dequeue</a> ()
<a name="l00360"></a>00360 {
<a name="l00361"></a>00361 QMutexLocker l (m_mutex);
<a name="l00362"></a>00362 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.clear();
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#55452448656b939d765b282a8f2f2f7c">00365</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#55452448656b939d765b282a8f2f2f7c" title="Suspend job execution if state = true, otherwise resume job execution if it was suspended...">Weaver::suspend</a> (<span class="keywordtype">bool</span> state)
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b" title="Lock the mutex for this weaver.">lock</a>();
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="keywordflow">if</span> (state)
<a name="l00370"></a>00370 {
<a name="l00371"></a>00371 <span class="comment">// no need to wake any threads here</span>
<a name="l00372"></a>00372 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#45db086873432be4797d22cd339a15b1" title="If m_suspend is true, no new jobs will be assigned to threads.">m_suspend</a> = <span class="keyword">true</span>;
<a name="l00373"></a>00373 <span class="keywordflow">if</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> == 0 && <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87" title="Is the queue empty?">isEmpty</a>() )
<a name="l00374"></a>00374 { <span class="comment">// instead of waking up threads:</span>
<a name="l00375"></a>00375 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c2194a835a687797486823c64e6cfaf4c2df" title="All jobs in the queue are done.">Event::Suspended</a>);
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377 } <span class="keywordflow">else</span> {
<a name="l00378"></a>00378 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#45db086873432be4797d22cd339a15b1" title="If m_suspend is true, no new jobs will be assigned to threads.">m_suspend</a> = <span class="keyword">false</span>;
<a name="l00379"></a>00379 <span class="comment">// make sure we emit suspended () even if all threads are sleeping:</span>
<a name="l00380"></a>00380 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#1a5453dded29ad5166ec1a3fc227ae80" title="Schedule enqueued jobs to be executed by idle threads.">assignJobs</a> ();
<a name="l00381"></a>00381 debug (2, <span class="stringliteral">"Weaver::suspend: queueing resumed.\n"</span> );
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00384"></a>00384 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00385"></a>00385 }
<a name="l00386"></a>00386
<a name="l00387"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#1a5453dded29ad5166ec1a3fc227ae80">00387</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#1a5453dded29ad5166ec1a3fc227ae80" title="Schedule enqueued jobs to be executed by idle threads.">Weaver::assignJobs</a>()
<a name="l00388"></a>00388 {
<a name="l00389"></a>00389 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#8420bc62fd80965ef584ddca692e2244" title="Wait condition all idle or done threads wait for.">m_jobAvailable</a>.wakeAll();
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00392"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d">00392</a> <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">Weaver::event</a> (QEvent *e )
<a name="l00393"></a>00393 {
<a name="l00394"></a>00394 <span class="keywordflow">if</span> ( e->type() >= QEvent::User )
<a name="l00395"></a>00395 {
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="keywordflow">if</span> ( e->type() == <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#4d2fecc43aab6e9b297515360b4d09ee" title="Return the (custom defined) event type.">Event::type</a>() )
<a name="l00398"></a>00398 {
<a name="l00399"></a>00399 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html" title="A class to represent the events threads generate and send to the Weaver object.">Event</a> *<span class="keyword">event</span> = (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html" title="A class to represent the events threads generate and send to the Weaver object.">Event</a>*) e;
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="keywordflow">switch</span> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->action() )
<a name="l00402"></a>00402 {
<a name="l00403"></a>00403 <span class="keywordflow">case</span> Event::JobFinished:
<a name="l00404"></a>00404 <span class="keywordflow">if</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->job() !=0 )
<a name="l00405"></a>00405 {
<a name="l00406"></a>00406 emit (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#18a7c06744c800f26afc6ff59747d7fb" title="This signal is emitted when a job is done.">jobDone</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->job() ) );
<a name="l00407"></a>00407 }
<a name="l00408"></a>00408 <span class="keywordflow">break</span>;
<a name="l00409"></a>00409 <span class="keywordflow">case</span> Event::Finished:
<a name="l00410"></a>00410 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c83a86a17666f3021e4ba41204d9bd45" title="This signal is emitted when the Weaver has finished ALL currently queued jobs.">finished</a>() );
<a name="l00411"></a>00411 <span class="keywordflow">break</span>;
<a name="l00412"></a>00412 <span class="keywordflow">case</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c2194a835a687797486823c64e6cfaf4c2df" title="All jobs in the queue are done.">Event::Suspended</a>:
<a name="l00413"></a>00413 emit ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#ffb8077099de149aa1ae9f71b62a10b9" title="Thread queueing has been suspended.">suspended</a>() );
<a name="l00414"></a>00414 <span class="keywordflow">break</span>;
<a name="l00415"></a>00415 <span class="keywordflow">case</span> Event::ThreadSuspended:
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (!<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c4e7a4f5f63c6308157f696c369750b2" title="Indicates if the weaver is shutting down and exiting it&#39;s threads.">m_shuttingDown</a> )
<a name="l00417"></a>00417 {
<a name="l00418"></a>00418 emit (threadSuspended ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->thread() ) );
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420 <span class="keywordflow">break</span>;
<a name="l00421"></a>00421 <span class="keywordflow">case</span> Event::ThreadBusy:
<a name="l00422"></a>00422 <span class="keywordflow">if</span> (!<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c4e7a4f5f63c6308157f696c369750b2" title="Indicates if the weaver is shutting down and exiting it&#39;s threads.">m_shuttingDown</a> )
<a name="l00423"></a>00423 {
<a name="l00424"></a>00424 emit (threadBusy (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->thread() ) );
<a name="l00425"></a>00425 }
<a name="l00426"></a>00426 <span class="keywordflow">break</span>;
<a name="l00427"></a>00427 <span class="keywordflow">default</span>:
<a name="l00428"></a>00428 <span class="keywordflow">break</span>;
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <span class="keywordflow">if</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>->job() !=0 )
<a name="l00432"></a>00432 {
<a name="l00433"></a>00433 <span class="keyword">event</span>->job()->processEvent (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#92feccd3db8b3ec1373a78139e411c5d" title="Check incoming events for user defined ones.">event</a>);
<a name="l00434"></a>00434 }
<a name="l00435"></a>00435 } <span class="keywordflow">else</span> {
<a name="l00436"></a>00436 debug ( 0, <span class="stringliteral">"Weaver::event: Strange: received unknown user event.\n"</span> );
<a name="l00437"></a>00437 }
<a name="l00438"></a>00438 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00439"></a>00439 } <span class="keywordflow">else</span> {
<a name="l00440"></a>00440 <span class="comment">// others - please make sure we are a QObject!</span>
<a name="l00441"></a>00441 <span class="keywordflow">return</span> QObject::event ( e );
<a name="l00442"></a>00442 }
<a name="l00443"></a>00443 }
<a name="l00444"></a>00444
<a name="l00445"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4">00445</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">Weaver::post</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c219">Event::Action</a> a, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a>* t, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* j)
<a name="l00446"></a>00446 {
<a name="l00447"></a>00447 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html" title="A class to represent the events threads generate and send to the Weaver object.">Event</a> *e = <span class="keyword">new</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html" title="A class to represent the events threads generate and send to the Weaver object.">Event</a> ( a, t, j);
<a name="l00448"></a>00448 QApplication::postEvent (<span class="keyword">this</span>, e);
<a name="l00449"></a>00449 }
<a name="l00450"></a>00450
<a name="l00451"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87">00451</a> <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87" title="Is the queue empty?">Weaver::isEmpty</a>()<span class="keyword"> const</span>
<a name="l00452"></a>00452 <span class="keyword"> </span>{
<a name="l00453"></a>00453 QMutexLocker l (m_mutex);
<a name="l00454"></a>00454 <span class="keywordflow">return</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.count()==0;
<a name="l00455"></a>00455 }
<a name="l00456"></a>00456
<a name="l00457"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#716fe21beb0c65750f5c0fa990178d25">00457</a> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#716fe21beb0c65750f5c0fa990178d25" title="Assign a job to the calling thread.">Weaver::applyForWork</a>(<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Thread.html" title="The class Thread is used to represent the worker threads in the weaver&#39;s inventory...">Thread</a> *th, <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a>* previous)
<a name="l00458"></a>00458 {
<a name="l00459"></a>00459 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Job.html" title="A Job is a simple abstraction of an action that is to be executed in a thread context...">Job</a> *rc = 0;
<a name="l00460"></a>00460 <span class="keywordtype">bool</span> lastjob = <span class="keyword">false</span>;
<a name="l00461"></a>00461 <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#ffb8077099de149aa1ae9f71b62a10b9" title="Thread queueing has been suspended.">suspended</a> = <span class="keyword">false</span>;
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="keywordflow">while</span> (<span class="keyword">true</span>)
<a name="l00464"></a>00464 {
<a name="l00465"></a>00465 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#58a96b8f350ae6c54f6197eed0d2851b" title="Lock the mutex for this weaver.">lock</a>();
<a name="l00466"></a>00466
<a name="l00467"></a>00467 <span class="keywordflow">if</span> (previous != 0)
<a name="l00468"></a>00468 { <span class="comment">// cleanup and send events:</span>
<a name="l00469"></a>00469 --<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a>;
<a name="l00470"></a>00470
<a name="l00471"></a>00471 debug ( 3, <span class="stringliteral">"Weaver::applyForWork: job done, %i jobs left, "</span>
<a name="l00472"></a>00472 <span class="stringliteral">"%i active jobs left.\n"</span>,
<a name="l00473"></a>00473 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#cd31f105a0dedf2375cc999a006303b7" title="Returns the number of pending jobs.">queueLength</a>(), <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> );
<a name="l00474"></a>00474
<a name="l00475"></a>00475 <span class="keywordflow">if</span> ( <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> == 0 && <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87" title="Is the queue empty?">isEmpty</a>() )
<a name="l00476"></a>00476 {
<a name="l00477"></a>00477 lastjob = <span class="keyword">true</span>;
<a name="l00478"></a>00478 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#46885facf2d244b1b4fa94e7ccf54174" title="m_running is set to true when a job is enqueued and set to false when the job finishes...">m_running</a> = <span class="keyword">false</span>;
<a name="l00479"></a>00479 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> (Event::Finished);
<a name="l00480"></a>00480 debug ( 3, <span class="stringliteral">"Weaver::applyForWork: last job.\n"</span> );
<a name="l00481"></a>00481 }
<a name="l00482"></a>00482
<a name="l00483"></a>00483 <span class="keywordflow">if</span> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> == 0 && <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#45db086873432be4797d22cd339a15b1" title="If m_suspend is true, no new jobs will be assigned to threads.">m_suspend</a> == <span class="keyword">true</span>)
<a name="l00484"></a>00484 {
<a name="l00485"></a>00485 suspended = <span class="keyword">true</span>;
<a name="l00486"></a>00486 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Event.html#a9901c5a6c6973f42722a32b13a3c2194a835a687797486823c64e6cfaf4c2df" title="All jobs in the queue are done.">Event::Suspended</a>);
<a name="l00487"></a>00487 debug ( 2, <span class="stringliteral">"Weaver::applyForWork: queueing suspended.\n"</span> );
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489
<a name="l00490"></a>00490 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#66e8a94ea6dab32b8361a7a8768411eb" title="Wait for a job to finish.">m_jobFinished</a>.wakeOne();
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492
<a name="l00493"></a>00493 previous = 0;
<a name="l00494"></a>00494
<a name="l00495"></a>00495 <span class="keywordflow">if</span> (<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c4e7a4f5f63c6308157f696c369750b2" title="Indicates if the weaver is shutting down and exiting it&#39;s threads.">m_shuttingDown</a> == <span class="keyword">true</span>)
<a name="l00496"></a>00496 {
<a name="l00497"></a>00497 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00498"></a>00498
<a name="l00499"></a>00499 <span class="keywordflow">return</span> 0;
<a name="l00500"></a>00500 } <span class="keywordflow">else</span> {
<a name="l00501"></a>00501 <span class="keywordflow">if</span> ( !<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87" title="Is the queue empty?">isEmpty</a>() && <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#45db086873432be4797d22cd339a15b1" title="If m_suspend is true, no new jobs will be assigned to threads.">m_suspend</a> == <span class="keyword">false</span> )
<a name="l00502"></a>00502 {
<a name="l00503"></a>00503 rc = <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.getFirst();
<a name="l00504"></a>00504 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.removeFirst ();
<a name="l00505"></a>00505 ++<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a>;
<a name="l00506"></a>00506
<a name="l00507"></a>00507 debug ( 3, <span class="stringliteral">"Weaver::applyForWork: job assigned, "</span>
<a name="l00508"></a>00508 <span class="stringliteral">"%i jobs in queue (%i active).\n"</span>,
<a name="l00509"></a>00509 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.count(), <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> );
<a name="l00510"></a>00510 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00511"></a>00511
<a name="l00512"></a>00512 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> (Event::ThreadBusy, th);
<a name="l00513"></a>00513
<a name="l00514"></a>00514 <span class="keywordflow">return</span> rc;
<a name="l00515"></a>00515 } <span class="keywordflow">else</span> {
<a name="l00516"></a>00516 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#c0ac0d7e21d3b78f79bc2e82aff4c29d" title="Unlock.">unlock</a>();
<a name="l00517"></a>00517
<a name="l00518"></a>00518 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#5bba55fc51ac1036522befc9c469b4e4" title="Post an event that is handled by this object, but in the main (GUI) thread.">post</a> (Event::ThreadSuspended, th);
<a name="l00519"></a>00519 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#8420bc62fd80965ef584ddca692e2244" title="Wait condition all idle or done threads wait for.">m_jobAvailable</a>.wait();
<a name="l00520"></a>00520 }
<a name="l00521"></a>00521 }
<a name="l00522"></a>00522 }
<a name="l00523"></a>00523 }
<a name="l00524"></a>00524
<a name="l00525"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#cd31f105a0dedf2375cc999a006303b7">00525</a> <span class="keywordtype">int</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#cd31f105a0dedf2375cc999a006303b7" title="Returns the number of pending jobs.">Weaver::queueLength</a>()
<a name="l00526"></a>00526 {
<a name="l00527"></a>00527 QMutexLocker l (m_mutex);
<a name="l00528"></a>00528 <span class="keywordflow">return</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#7ff1159de91e03d2dde19cf453ae0b61" title="The job queue.">m_assignments</a>.count();
<a name="l00529"></a>00529 }
<a name="l00530"></a>00530
<a name="l00531"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#a5bc93b83df29e17304cede7d3f9661b">00531</a> <span class="keywordtype">bool</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#a5bc93b83df29e17304cede7d3f9661b" title="Is the weaver idle? The weaver is idle if no jobs are queued and no jobs are processed...">Weaver::isIdle</a> ()<span class="keyword"> const</span>
<a name="l00532"></a>00532 <span class="keyword"> </span>{
<a name="l00533"></a>00533 QMutexLocker l (m_mutex);
<a name="l00534"></a>00534 <span class="keywordflow">return</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#4145ef3689e847c65830ed1848d78e87" title="Is the queue empty?">isEmpty</a>() && <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#b52ea52d66a2edd8afcb6d385741c2bd" title="The number of jobs that are assigned to the worker threads, but not finished.">m_active</a> == 0;
<a name="l00535"></a>00535 }
<a name="l00536"></a>00536
<a name="l00537"></a><a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2b4aac62a05f989002548068107f313a">00537</a> <span class="keywordtype">void</span> <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#2b4aac62a05f989002548068107f313a" title="Get notified when a thread has finished a job.">Weaver::finish</a>()
<a name="l00538"></a>00538 {
<a name="l00539"></a>00539 <span class="keywordflow">while</span> ( !<a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#a5bc93b83df29e17304cede7d3f9661b" title="Is the weaver idle? The weaver is idle if no jobs are queued and no jobs are processed...">isIdle</a>() )
<a name="l00540"></a>00540 {
<a name="l00541"></a>00541 debug (2, <span class="stringliteral">"Weaver::finish: not done, waiting.\n"</span> );
<a name="l00542"></a>00542 <a class="code" href="classKPIM_1_1ThreadWeaver_1_1Weaver.html#66e8a94ea6dab32b8361a7a8768411eb" title="Wait for a job to finish.">m_jobFinished</a>.wait();
<a name="l00543"></a>00543 }
<a name="l00544"></a>00544 debug (1, <span class="stringliteral">"Weaver::finish: done.\n\n\n"</span> );
<a name="l00545"></a>00545 }
<a name="l00546"></a>00546
<a name="l00547"></a>00547 }
<a name="l00548"></a>00548 }
<a name="l00549"></a>00549
<a name="l00550"></a>00550 <span class="preprocessor">#include "weaver.moc"</span>
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