Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/producerconsumer_8c_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/PIPS/opencproducerconsumerex/src/producerconsumer.c</h1><a href="producerconsumer_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00016"></a>00016 <span class="comment">/* INCLUDE FILES */</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <pthread.h></span>
<a name="l00018"></a>00018 <span class="preprocessor">#include <errno.h></span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <unistd.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <fcntl.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <sys/stat.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <sys/ioctl.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <stdio.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00026"></a>00026 <span class="comment">//#include <staticlibinit_gcce.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "CommanHeader.h"</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keywordtype">int</span> <a class="code" href="redirectprintf_8c.html#a840291bc02cba5474a4cb46a9b9566fe">main</a>()
<a name="l00030"></a>00030 {
<a name="l00031"></a>00031 <a class="code" href="struct_thread_param.html">ThreadParam</a> threadParams[MAX_CLIENTS + 1];
<a name="l00032"></a>00032 pthread_t threadID[MAX_CLIENTS + 1];
<a name="l00033"></a>00033 <span class="keywordtype">int</span> i = 0;
<a name="l00034"></a>00034 <span class="keywordtype">int</span> noOfConsumers = 0;
<a name="l00035"></a>00035 <span class="keywordtype">int</span> noOfItems = 0;
<a name="l00036"></a>00036 <span class="keywordtype">int</span> totalItems = 0;
<a name="l00037"></a>00037 <span class="keywordtype">int</span> ret = 0;
<a name="l00038"></a>00038 <span class="keywordtype">int</span> exitReason = 0;
<a name="l00039"></a>00039 sem_t semLock;
<a name="l00040"></a>00040 pthread_attr_t threadAttr;
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keywordflow">if</span>( sem_init( &semLock, 0, 1 ) != 0 )
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 printf(<span class="stringliteral">"Error Creating semaphore"</span>);
<a name="l00045"></a>00045 exit(-1);
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="comment">/* Read all the inputs needed */</span>
<a name="l00049"></a>00049 printf(<span class="stringliteral">"Enter Number of Consumers : "</span>);
<a name="l00050"></a>00050 scanf(<span class="stringliteral">"%d"</span>, &noOfConsumers);
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordflow">if</span>(MAX_CLIENTS < noOfConsumers)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 noOfConsumers = MAX_CLIENTS;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keywordflow">for</span>(i=1; i<=noOfConsumers; i++)
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 printf(<span class="stringliteral">"Items Needed by Consumer-%d : "</span>, i);
<a name="l00060"></a>00060 scanf(<span class="stringliteral">"%d"</span>, &noOfItems);
<a name="l00061"></a>00061 totalItems += noOfItems;
<a name="l00062"></a>00062
<a name="l00063"></a>00063 threadParams[i].noOfItems = noOfItems;
<a name="l00064"></a>00064 threadParams[i].itemLock = semLock;
<a name="l00065"></a>00065 threadParams[i].noOfConsumers = i;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="comment">/* For the Producer */</span>
<a name="l00069"></a>00069 threadParams[0].noOfItems = totalItems;
<a name="l00070"></a>00070 threadParams[0].noOfConsumers = noOfConsumers;
<a name="l00071"></a>00071 threadParams[0].itemLock = semLock;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 pthread_attr_init( &threadAttr );
<a name="l00074"></a>00074 pthread_attr_setdetachstate( &threadAttr, PTHREAD_CREATE_JOINABLE );
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="comment">/* Create a Producer thread now */</span>
<a name="l00077"></a>00077 ret = pthread_create( &threadID[0], &threadAttr, <a class="code" href="producer_8c.html#a9ba1d3d3c7c4fefedf72684e9abdc8ee">ProducerThreadEntryPoint</a>,
<a name="l00078"></a>00078 (<span class="keywordtype">void</span>*)&threadParams[0] );
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keywordflow">if</span>(ret != 0)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 printf(<span class="stringliteral">"Error Creating Producer Thread"</span>);
<a name="l00083"></a>00083 exit(-1);
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">/* Create a Consumer Threads now */</span>
<a name="l00087"></a>00087 <span class="keywordflow">for</span>(i=1; i <= noOfConsumers; i++)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 ret = pthread_create( &threadID[i], &threadAttr, <a class="code" href="consumer_8c.html#aeb7daec86aaf17cff923e4e69e1ca964">ConsumerThreadEntryPoint</a>,
<a name="l00090"></a>00090 (<span class="keywordtype">void</span>*)&threadParams[i] );
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keywordflow">if</span>(ret != 0)
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 printf(<span class="stringliteral">"Error Creating Consumer Thread %d"</span>, i);
<a name="l00095"></a>00095 exit(-1);
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">/* Call C++ function that creats Observer Thread */</span>
<a name="l00100"></a>00100 <a class="code" href="observer_8cpp.html#abe25ac9eb42087610e2949b201e2f0b5">CreateObserverThread</a> (totalItems * 2);
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment">/* Wait for the completion of all the threads */</span>
<a name="l00103"></a>00103 <span class="keywordflow">for</span>(i=0; i<=noOfConsumers; i++)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 ret = pthread_join(threadID[i], (<span class="keywordtype">void</span>**)&exitReason );
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">/* Destroy the semaphore */</span>
<a name="l00109"></a>00109 sem_destroy( &semLock );
<a name="l00110"></a>00110 printf(<span class="stringliteral">"Completed the Production/Consumption..\n Press Any Key to Exit"</span>);
<a name="l00111"></a>00111 getchar();
<a name="l00112"></a>00112 getchar();
<a name="l00113"></a>00113 <span class="keywordflow">return</span> 0;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">/* End of File */</span>
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