107 lines
6.3 KiB
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107 lines
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<h1>scheduler.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// "sched_thread.cpp"</span>
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<a name="l00002"></a>00002
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<a name="l00003"></a>00003 <span class="comment">// (c) OPAC Team, LIFL, August 2005</span>
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<a name="l00004"></a>00004
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<a name="l00005"></a>00005 <span class="comment">/* </span>
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<a name="l00006"></a>00006 <span class="comment"> Contact: paradiseo-help@lists.gforge.inria.fr</span>
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<a name="l00007"></a>00007 <span class="comment">*/</span>
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<a name="l00008"></a>00008
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<a name="l00009"></a>00009 <span class="preprocessor">#include <queue></span>
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<a name="l00010"></a>00010
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<a name="l00011"></a>00011 <span class="preprocessor">#include "scheduler.h"</span>
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<a name="l00012"></a>00012 <span class="preprocessor">#include "tags.h"</span>
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<a name="l00013"></a>00013 <span class="preprocessor">#include "mess.h"</span>
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<a name="l00014"></a>00014 <span class="preprocessor">#include "../../core/peo_debug.h"</span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016 <span class="keyword">static</span> std :: queue <SCHED_RESOURCE> resources; <span class="comment">/* Free resources */</span>
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="keyword">static</span> std :: queue <SCHED_REQUEST> requests; <span class="comment">/* Requests */</span>
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<a name="l00019"></a>00019
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<a name="l00020"></a>00020 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> initNumberOfRes = 0;
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<a name="l00021"></a>00021
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<a name="l00022"></a>00022 <span class="keywordtype">void</span> initScheduler () {
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<a name="l00023"></a>00023
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<a name="l00024"></a>00024 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < the_schema.size (); i ++) {
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 <span class="keyword">const</span> <a class="code" href="structNode.html">Node</a> & node = the_schema [i];
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<a name="l00027"></a>00027
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<a name="l00028"></a>00028 <span class="keywordflow">if</span> (node.rk_sched == my_node -> rk)
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<a name="l00029"></a>00029 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; j < node.num_workers; j ++)
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<a name="l00030"></a>00030 resources.push (std :: pair <RANK_ID, WORKER_ID> (i, j + 1));
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<a name="l00031"></a>00031 }
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<a name="l00032"></a>00032 initNumberOfRes = resources.size ();
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<a name="l00033"></a>00033 }
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035 <span class="keywordtype">bool</span> allResourcesFree () {
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<a name="l00036"></a>00036
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<a name="l00037"></a>00037 <span class="keywordflow">return</span> resources.size () == initNumberOfRes;
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<a name="l00038"></a>00038 }
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<a name="l00039"></a>00039
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<a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keywordtype">void</span> update () {
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<a name="l00041"></a>00041
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<a name="l00042"></a>00042 <span class="keywordtype">unsigned</span> num_alloc = std :: min (resources.size (), requests.size ());
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<a name="l00043"></a>00043
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<a name="l00044"></a>00044 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < num_alloc; i ++) {
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<a name="l00045"></a>00045
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<a name="l00046"></a>00046 SCHED_REQUEST req = requests.front ();
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<a name="l00047"></a>00047 requests.pop ();
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049 SCHED_RESOURCE res = resources.front ();
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<a name="l00050"></a>00050 resources.pop ();
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<a name="l00051"></a>00051
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<a name="l00052"></a>00052 printDebugMessage (<span class="stringliteral">"allocating a resource."</span>);
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<a name="l00053"></a>00053 initMessage ();
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<a name="l00054"></a>00054 pack (req.second);
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<a name="l00055"></a>00055 pack (res);
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<a name="l00056"></a>00056 sendMessage (req.first, SCHED_RESULT_TAG);
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<a name="l00057"></a>00057 }
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<a name="l00058"></a>00058 }
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<a name="l00059"></a>00059
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<a name="l00060"></a>00060 <span class="keywordtype">void</span> unpackResourceRequest () {
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<a name="l00061"></a>00061
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<a name="l00062"></a>00062 printDebugMessage (<span class="stringliteral">"queuing a resource request."</span>);
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<a name="l00063"></a>00063 SCHED_REQUEST req;
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<a name="l00064"></a>00064 unpack (req);
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<a name="l00065"></a>00065 requests.push (req);
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<a name="l00066"></a>00066 update ();
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<a name="l00067"></a>00067 }
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<a name="l00068"></a>00068
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<a name="l00069"></a>00069 <span class="keywordtype">void</span> unpackTaskDone () {
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<a name="l00070"></a>00070
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<a name="l00071"></a>00071 printDebugMessage (<span class="stringliteral">"I'm notified a worker is now idle."</span>);
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<a name="l00072"></a>00072 SCHED_RESOURCE res;
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<a name="l00073"></a>00073 unpack (res);
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<a name="l00074"></a>00074 resources.push (res);
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<a name="l00075"></a>00075 <span class="keywordflow">if</span> (resources.size () == initNumberOfRes)
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<a name="l00076"></a>00076 printDebugMessage (<span class="stringliteral">"all the resources are now free."</span>);
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<a name="l00077"></a>00077 update ();
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<a name="l00078"></a>00078 }
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jan 9 15:47:38 2007 for ParadisEO-PEO by
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.7 </small></address>
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