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5 <title>TB9.2 Example Applications: examples/PIPS/opencproducerconsumerex/src/producerconsumer.c Source File</title> |
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11 <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 |
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12 <a name="l00016"></a>00016 <span class="comment">/* INCLUDE FILES */</span> |
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13 <a name="l00017"></a>00017 <span class="preprocessor">#include <pthread.h></span> |
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14 <a name="l00018"></a>00018 <span class="preprocessor">#include <errno.h></span> |
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15 <a name="l00019"></a>00019 <span class="preprocessor">#include <unistd.h></span> |
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16 <a name="l00020"></a>00020 <span class="preprocessor">#include <fcntl.h></span> |
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17 <a name="l00021"></a>00021 <span class="preprocessor">#include <sys/stat.h></span> |
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18 <a name="l00022"></a>00022 <span class="preprocessor">#include <sys/types.h></span> |
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19 <a name="l00023"></a>00023 <span class="preprocessor">#include <sys/ioctl.h></span> |
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20 <a name="l00024"></a>00024 <span class="preprocessor">#include <stdio.h></span> |
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21 <a name="l00025"></a>00025 <span class="preprocessor">#include <stdlib.h></span> |
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22 <a name="l00026"></a>00026 <span class="comment">//#include <staticlibinit_gcce.h></span> |
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23 <a name="l00027"></a>00027 <span class="preprocessor">#include "CommanHeader.h"</span> |
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24 <a name="l00028"></a>00028 |
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25 <a name="l00029"></a>00029 <span class="keywordtype">int</span> <a class="code" href="redirectprintf_8c.html#a840291bc02cba5474a4cb46a9b9566fe">main</a>() |
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26 <a name="l00030"></a>00030 { |
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27 <a name="l00031"></a>00031 <a class="code" href="struct_thread_param.html">ThreadParam</a> threadParams[MAX_CLIENTS + 1]; |
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28 <a name="l00032"></a>00032 pthread_t threadID[MAX_CLIENTS + 1]; |
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29 <a name="l00033"></a>00033 <span class="keywordtype">int</span> i = 0; |
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30 <a name="l00034"></a>00034 <span class="keywordtype">int</span> noOfConsumers = 0; |
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31 <a name="l00035"></a>00035 <span class="keywordtype">int</span> noOfItems = 0; |
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32 <a name="l00036"></a>00036 <span class="keywordtype">int</span> totalItems = 0; |
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33 <a name="l00037"></a>00037 <span class="keywordtype">int</span> ret = 0; |
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34 <a name="l00038"></a>00038 <span class="keywordtype">int</span> exitReason = 0; |
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35 <a name="l00039"></a>00039 sem_t semLock; |
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36 <a name="l00040"></a>00040 pthread_attr_t threadAttr; |
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37 <a name="l00041"></a>00041 |
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38 <a name="l00042"></a>00042 <span class="keywordflow">if</span>( sem_init( &semLock, 0, 1 ) != 0 ) |
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39 <a name="l00043"></a>00043 { |
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40 <a name="l00044"></a>00044 printf(<span class="stringliteral">"Error Creating semaphore"</span>); |
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41 <a name="l00045"></a>00045 exit(-1); |
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42 <a name="l00046"></a>00046 } |
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43 <a name="l00047"></a>00047 |
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44 <a name="l00048"></a>00048 <span class="comment">/* Read all the inputs needed */</span> |
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45 <a name="l00049"></a>00049 printf(<span class="stringliteral">"Enter Number of Consumers : "</span>); |
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46 <a name="l00050"></a>00050 scanf(<span class="stringliteral">"%d"</span>, &noOfConsumers); |
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47 <a name="l00051"></a>00051 |
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48 <a name="l00052"></a>00052 <span class="keywordflow">if</span>(MAX_CLIENTS < noOfConsumers) |
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49 <a name="l00053"></a>00053 { |
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50 <a name="l00054"></a>00054 noOfConsumers = MAX_CLIENTS; |
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51 <a name="l00055"></a>00055 } |
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52 <a name="l00056"></a>00056 |
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53 <a name="l00057"></a>00057 <span class="keywordflow">for</span>(i=1; i<=noOfConsumers; i++) |
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54 <a name="l00058"></a>00058 { |
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55 <a name="l00059"></a>00059 printf(<span class="stringliteral">"Items Needed by Consumer-%d : "</span>, i); |
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56 <a name="l00060"></a>00060 scanf(<span class="stringliteral">"%d"</span>, &noOfItems); |
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57 <a name="l00061"></a>00061 totalItems += noOfItems; |
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58 <a name="l00062"></a>00062 |
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59 <a name="l00063"></a>00063 threadParams[i].noOfItems = noOfItems; |
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60 <a name="l00064"></a>00064 threadParams[i].itemLock = semLock; |
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61 <a name="l00065"></a>00065 threadParams[i].noOfConsumers = i; |
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62 <a name="l00066"></a>00066 } |
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63 <a name="l00067"></a>00067 |
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64 <a name="l00068"></a>00068 <span class="comment">/* For the Producer */</span> |
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65 <a name="l00069"></a>00069 threadParams[0].noOfItems = totalItems; |
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66 <a name="l00070"></a>00070 threadParams[0].noOfConsumers = noOfConsumers; |
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67 <a name="l00071"></a>00071 threadParams[0].itemLock = semLock; |
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68 <a name="l00072"></a>00072 |
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69 <a name="l00073"></a>00073 pthread_attr_init( &threadAttr ); |
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70 <a name="l00074"></a>00074 pthread_attr_setdetachstate( &threadAttr, PTHREAD_CREATE_JOINABLE ); |
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71 <a name="l00075"></a>00075 |
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72 <a name="l00076"></a>00076 <span class="comment">/* Create a Producer thread now */</span> |
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73 <a name="l00077"></a>00077 ret = pthread_create( &threadID[0], &threadAttr, <a class="code" href="producer_8c.html#a9ba1d3d3c7c4fefedf72684e9abdc8ee">ProducerThreadEntryPoint</a>, |
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74 <a name="l00078"></a>00078 (<span class="keywordtype">void</span>*)&threadParams[0] ); |
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75 <a name="l00079"></a>00079 |
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76 <a name="l00080"></a>00080 <span class="keywordflow">if</span>(ret != 0) |
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77 <a name="l00081"></a>00081 { |
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78 <a name="l00082"></a>00082 printf(<span class="stringliteral">"Error Creating Producer Thread"</span>); |
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79 <a name="l00083"></a>00083 exit(-1); |
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80 <a name="l00084"></a>00084 } |
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81 <a name="l00085"></a>00085 |
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82 <a name="l00086"></a>00086 <span class="comment">/* Create a Consumer Threads now */</span> |
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83 <a name="l00087"></a>00087 <span class="keywordflow">for</span>(i=1; i <= noOfConsumers; i++) |
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84 <a name="l00088"></a>00088 { |
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85 <a name="l00089"></a>00089 ret = pthread_create( &threadID[i], &threadAttr, <a class="code" href="consumer_8c.html#aeb7daec86aaf17cff923e4e69e1ca964">ConsumerThreadEntryPoint</a>, |
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86 <a name="l00090"></a>00090 (<span class="keywordtype">void</span>*)&threadParams[i] ); |
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87 <a name="l00091"></a>00091 |
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88 <a name="l00092"></a>00092 <span class="keywordflow">if</span>(ret != 0) |
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89 <a name="l00093"></a>00093 { |
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90 <a name="l00094"></a>00094 printf(<span class="stringliteral">"Error Creating Consumer Thread %d"</span>, i); |
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91 <a name="l00095"></a>00095 exit(-1); |
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92 <a name="l00096"></a>00096 } |
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93 <a name="l00097"></a>00097 } |
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94 <a name="l00098"></a>00098 |
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95 <a name="l00099"></a>00099 <span class="comment">/* Call C++ function that creats Observer Thread */</span> |
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96 <a name="l00100"></a>00100 <a class="code" href="observer_8cpp.html#abe25ac9eb42087610e2949b201e2f0b5">CreateObserverThread</a> (totalItems * 2); |
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97 <a name="l00101"></a>00101 |
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98 <a name="l00102"></a>00102 <span class="comment">/* Wait for the completion of all the threads */</span> |
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99 <a name="l00103"></a>00103 <span class="keywordflow">for</span>(i=0; i<=noOfConsumers; i++) |
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100 <a name="l00104"></a>00104 { |
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101 <a name="l00105"></a>00105 ret = pthread_join(threadID[i], (<span class="keywordtype">void</span>**)&exitReason ); |
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102 <a name="l00106"></a>00106 } |
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103 <a name="l00107"></a>00107 |
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104 <a name="l00108"></a>00108 <span class="comment">/* Destroy the semaphore */</span> |
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105 <a name="l00109"></a>00109 sem_destroy( &semLock ); |
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106 <a name="l00110"></a>00110 printf(<span class="stringliteral">"Completed the Production/Consumption..\n Press Any Key to Exit"</span>); |
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107 <a name="l00111"></a>00111 getchar(); |
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108 <a name="l00112"></a>00112 getchar(); |
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109 <a name="l00113"></a>00113 <span class="keywordflow">return</span> 0; |
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110 <a name="l00114"></a>00114 } |
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111 <a name="l00115"></a>00115 |
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112 <a name="l00116"></a>00116 <span class="comment">/* End of File */</span> |
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113 </pre></div></div> |
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