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3 <title>TB10.1 Example Applications: examples/Base/SemaphoreExample/src/CDatabase.cpp Source File</title> |
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8 <h1>examples/Base/SemaphoreExample/src/CDatabase.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).</span> |
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9 <a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span> |
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10 <a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span> |
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11 <a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span> |
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12 <a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span> |
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13 <a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span> |
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14 <a name="l00007"></a>00007 <span class="comment">//</span> |
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15 <a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span> |
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16 <a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span> |
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17 <a name="l00010"></a>00010 <span class="comment">//</span> |
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18 <a name="l00011"></a>00011 <span class="comment">// Contributors:</span> |
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19 <a name="l00012"></a>00012 <span class="comment">//</span> |
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20 <a name="l00013"></a>00013 <span class="comment">// Description:</span> |
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21 <a name="l00014"></a>00014 <span class="comment">// This class contains methods to create a database of integers and periodically read /write integers</span> |
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22 <a name="l00015"></a>00015 <span class="comment">// from/ to the database. The macro USE_SEMAPHORE is used at various places to show thread synchronization</span> |
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23 <a name="l00016"></a>00016 <span class="comment">// using a semaphore. </span> |
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24 <a name="l00017"></a>00017 |
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25 <a name="l00018"></a>00018 <span class="preprocessor">#include "CDatabase.h"</span> |
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26 <a name="l00019"></a>00019 |
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27 <a name="l00020"></a>00020 <span class="comment">//Declare a delay of 1000000 microseconds i.e. 1 sec for the periodic functions. </span> |
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28 <a name="l00021"></a>00021 <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="transparent_8h.html#c2252065f9b9ad3eb46336220d1672ae">KDelay</a> = 1000000; |
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29 <a name="l00022"></a>00022 |
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30 <a name="l00023"></a>00023 <span class="comment">//The last number in the database.</span> |
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31 <a name="l00024"></a>00024 <span class="keyword">const</span> <span class="keywordtype">int</span> KLastNum = 50; |
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32 <a name="l00025"></a>00025 |
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33 <a name="l00029"></a><a class="code" href="class_c_database.html#ab355b9be127debd7a5d54e5ac8f9021">00029</a> <a class="code" href="class_c_database.html">CDatabase</a>* <a class="code" href="class_c_database.html#ab355b9be127debd7a5d54e5ac8f9021">CDatabase::NewL</a>() |
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34 <a name="l00030"></a>00030 { |
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35 <a name="l00031"></a>00031 <a class="code" href="class_c_database.html">CDatabase</a>* <span class="keyword">self</span>=<span class="keyword">new</span>(ELeave)<a class="code" href="class_c_database.html">CDatabase</a>(); |
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36 <a name="l00032"></a>00032 CleanupStack::PushL(<span class="keyword">self</span>); |
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37 <a name="l00033"></a>00033 <span class="keyword">self</span>->ConstructL(); |
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38 <a name="l00034"></a>00034 CleanupStack::Pop(<span class="keyword">self</span>); |
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39 <a name="l00035"></a>00035 <span class="keywordflow">return</span> <span class="keyword">self</span>; |
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40 <a name="l00036"></a>00036 } |
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41 <a name="l00037"></a>00037 |
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42 <a name="l00041"></a><a class="code" href="class_c_database.html#9a3adb67c04d4f1432556aab4149841e">00041</a> <a class="code" href="class_c_database.html#9a3adb67c04d4f1432556aab4149841e">CDatabase::~CDatabase</a>() |
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43 <a name="l00042"></a>00042 { |
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44 <a name="l00043"></a>00043 iFsSession.Close(); <span class="comment">//close the file server session. </span> |
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45 <a name="l00044"></a>00044 <span class="keyword">delete</span> iPeriodic; <span class="comment">//delete the periodic object.</span> |
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46 <a name="l00045"></a>00045 <span class="keyword">delete</span> iConsole; <span class="comment">//delete the console. </span> |
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47 <a name="l00046"></a>00046 <span class="preprocessor"> #ifdef USE_SEMAPHORE</span> |
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48 <a name="l00047"></a>00047 <span class="preprocessor"></span> iSemWrite.Close(); |
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49 <a name="l00048"></a>00048 <span class="preprocessor"> #endif</span> |
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50 <a name="l00049"></a>00049 <span class="preprocessor"></span> } |
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51 <a name="l00050"></a>00050 |
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52 <a name="l00054"></a><a class="code" href="class_c_database.html#d3d6215a0fa65e7ead3533065905a747">00054</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#d3d6215a0fa65e7ead3533065905a747">CDatabase::ConstructL</a>() |
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53 <a name="l00055"></a>00055 { |
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54 <a name="l00056"></a>00056 iPeriodic = CPeriodic::NewL(CActive::EPriorityUserInput); |
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55 <a name="l00057"></a>00057 |
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56 <a name="l00058"></a>00058 _LIT(KDbCreateDb,<span class="stringliteral">"exampleDatabase.db"</span>); |
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57 <a name="l00059"></a>00059 |
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58 <a name="l00060"></a>00060 iFsSession.Connect(); |
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59 <a name="l00061"></a>00061 |
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60 <a name="l00062"></a>00062 <span class="comment">//The database exampleDatabase.db is created as a permanent file store </span> |
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61 <a name="l00063"></a>00063 <span class="comment">//in the app's private directory.</span> |
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62 <a name="l00064"></a>00064 User::LeaveIfError(iFsSession.CreatePrivatePath(RFs::GetSystemDrive())); |
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63 <a name="l00065"></a>00065 |
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64 <a name="l00066"></a>00066 User::LeaveIfError(iFsSession.PrivatePath(iDbname)); |
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65 <a name="l00067"></a>00067 iDbname.Append(KDbCreateDb); |
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66 <a name="l00068"></a>00068 |
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67 <a name="l00069"></a>00069 <span class="preprocessor"> #ifdef USE_SEMAPHORE</span> |
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68 <a name="l00070"></a>00070 <span class="preprocessor"></span> <span class="comment">//Open the global semaphore which was created in CSemaphoreExample. </span> |
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69 <a name="l00071"></a>00071 _LIT(KSemaphoreWrite, <span class="stringliteral">"WriteSemaphore"</span>); |
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70 <a name="l00072"></a>00072 User::LeaveIfError(iSemWrite.OpenGlobal(KSemaphoreWrite, EOwnerProcess)); |
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71 <a name="l00073"></a>00073 <span class="preprocessor"> #endif</span> |
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72 <a name="l00074"></a>00074 <span class="preprocessor"></span> } |
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73 <a name="l00075"></a>00075 |
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74 <a name="l00079"></a><a class="code" href="class_c_database.html#89047671e6c027e4551a8b7a276add96">00079</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#89047671e6c027e4551a8b7a276add96">CDatabase::CreateDatabaseL</a>() |
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75 <a name="l00080"></a>00080 { |
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76 <a name="l00081"></a>00081 <span class="comment">//Construct a file store object - the file to contain the</span> |
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77 <a name="l00082"></a>00082 <span class="comment">//database replaces any existing file of the same name.</span> |
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78 <a name="l00083"></a>00083 CFileStore* store = CPermanentFileStore::ReplaceLC(iFsSession, iDbname, EFileRead|EFileWrite); |
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79 <a name="l00084"></a>00084 <span class="comment">//Complete file store creation.</span> |
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80 <a name="l00085"></a>00085 store->SetTypeL(store->Layout()); |
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81 <a name="l00086"></a>00086 |
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82 <a name="l00087"></a>00087 <span class="comment">//Create a database in the store. </span> |
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83 <a name="l00088"></a>00088 TStreamId <span class="keywordtype">id</span>= iDatabase.CreateL(store); |
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84 <a name="l00089"></a>00089 |
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85 <a name="l00090"></a>00090 <span class="comment">//Keep database id as root of store.</span> |
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86 <a name="l00091"></a>00091 store->SetRootL(<span class="keywordtype">id</span>); |
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87 <a name="l00092"></a>00092 |
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88 <a name="l00093"></a>00093 <span class="comment">//Complete database creation by commiting the store.</span> |
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89 <a name="l00094"></a>00094 store->CommitL(); |
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90 <a name="l00095"></a>00095 |
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91 <a name="l00096"></a>00096 |
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92 <a name="l00097"></a>00097 <span class="comment">//Create a table definition.</span> |
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93 <a name="l00098"></a>00098 CDbColSet* columns=CDbColSet::NewLC(); |
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94 <a name="l00099"></a>00099 |
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95 <a name="l00100"></a>00100 <span class="comment">//Add three columns each containing Int32 values. </span> |
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96 <a name="l00101"></a>00101 _LIT(KCol1, <span class="stringliteral">"Number1"</span>); |
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97 <a name="l00102"></a>00102 _LIT(KCol2, <span class="stringliteral">"Number2"</span>); |
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98 <a name="l00103"></a>00103 _LIT(KCol3, <span class="stringliteral">"Number3"</span>); |
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99 <a name="l00104"></a>00104 columns->AddL(TDbCol(KCol1,EDbColInt32)); |
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100 <a name="l00105"></a>00105 columns->AddL(TDbCol(KCol2,EDbColInt32)); |
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101 <a name="l00106"></a>00106 columns->AddL(TDbCol(KCol3,EDbColInt32)); |
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102 <a name="l00107"></a>00107 |
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103 <a name="l00108"></a>00108 |
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104 <a name="l00109"></a>00109 <span class="comment">//Create the table, table name is "Numbers" and add the columns to it.</span> |
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105 <a name="l00110"></a>00110 _LIT(KTable, <span class="stringliteral">"Numbers"</span>); |
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106 <a name="l00111"></a>00111 User::LeaveIfError(iDatabase.CreateTable(KTable,*columns)); |
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107 <a name="l00112"></a>00112 |
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108 <a name="l00113"></a>00113 CDbKey* key=CDbKey::NewLC(); |
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109 <a name="l00114"></a>00114 |
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110 <a name="l00115"></a>00115 <span class="comment">//Add the key columns.</span> |
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111 <a name="l00116"></a>00116 TDbKeyCol number1(KCol1); |
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112 <a name="l00117"></a>00117 key->AddL(number1); |
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113 <a name="l00118"></a>00118 TDbKeyCol number2(KCol2); |
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114 <a name="l00119"></a>00119 key->AddL(number2); |
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115 <a name="l00120"></a>00120 TDbKeyCol number3(KCol3); |
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116 <a name="l00121"></a>00121 key->AddL(number3); |
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117 <a name="l00122"></a>00122 User::LeaveIfError(iDatabase.CreateIndex(KTable,KTable,*key)); |
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118 <a name="l00123"></a>00123 |
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119 <a name="l00124"></a>00124 iDatabase.Close(); |
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120 <a name="l00125"></a>00125 <span class="comment">//Cleanup the column set. </span> |
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121 <a name="l00126"></a>00126 CleanupStack::PopAndDestroy(key); |
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122 <a name="l00127"></a>00127 CleanupStack::PopAndDestroy(columns); |
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123 <a name="l00128"></a>00128 CleanupStack::PopAndDestroy(store); |
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124 <a name="l00129"></a>00129 } |
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125 <a name="l00130"></a>00130 |
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126 <a name="l00135"></a><a class="code" href="class_c_database.html#5df7d7393cfb36c850d562df4f35a0f6">00135</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#5df7d7393cfb36c850d562df4f35a0f6">CDatabase::WritetoDatabaseL</a>() |
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127 <a name="l00136"></a>00136 { |
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128 <a name="l00137"></a>00137 iPeriodic->Start(0, <a class="code" href="transparent_8h.html#c2252065f9b9ad3eb46336220d1672ae">KDelay</a>, TCallBack(<a class="code" href="class_c_database.html#726242c03596e80a98deeef4c5c1681c">PeriodicWriteL</a>, <span class="keyword">this</span>)); |
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129 <a name="l00138"></a>00138 CActiveScheduler::Start(); |
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130 <a name="l00139"></a>00139 } |
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131 <a name="l00140"></a>00140 |
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132 <a name="l00145"></a><a class="code" href="class_c_database.html#726242c03596e80a98deeef4c5c1681c">00145</a> TInt <a class="code" href="class_c_database.html#726242c03596e80a98deeef4c5c1681c">CDatabase::PeriodicWriteL</a>(TAny* aPtr) |
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133 <a name="l00146"></a>00146 { |
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134 <a name="l00147"></a>00147 <a class="code" href="class_c_database.html">CDatabase</a>* ptr = <span class="keyword">static_cast<</span><a class="code" href="class_c_database.html">CDatabase</a>*<span class="keyword">></span> (aPtr); |
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135 <a name="l00148"></a>00148 <span class="comment">//Invoke the RThread::Resume() function on the consumer thread repeatedly.</span> |
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136 <a name="l00149"></a>00149 ptr-><a class="code" href="class_c_database.html#4a0f7606f98a6db98addb52a7ca2b881">PeriodicWriteFuncL</a>(); |
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137 <a name="l00150"></a>00150 <span class="keywordflow">return</span> KErrNone; |
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138 <a name="l00151"></a>00151 } |
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139 <a name="l00152"></a>00152 |
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140 <a name="l00157"></a><a class="code" href="class_c_database.html#4a0f7606f98a6db98addb52a7ca2b881">00157</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#4a0f7606f98a6db98addb52a7ca2b881">CDatabase::PeriodicWriteFuncL</a>() |
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141 <a name="l00158"></a>00158 { |
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142 <a name="l00159"></a>00159 <span class="comment">//Declare an integer which is used to fill numbers in the database. </span> |
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143 <a name="l00160"></a>00160 <span class="keyword">static</span> <span class="keywordtype">int</span> num = 0 ; |
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144 <a name="l00161"></a>00161 |
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145 <a name="l00162"></a>00162 <span class="comment">//Open the file store.</span> |
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146 <a name="l00163"></a>00163 _LIT(KSQLStatement,<span class="stringliteral">"select Number1, Number2, Number3 from Numbers order by Number1,Number2,Number3"</span>); |
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147 <a name="l00164"></a>00164 CFileStore* store = CFileStore::OpenLC(iFsSession,iDbname,EFileRead|EFileWrite); |
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148 <a name="l00165"></a>00165 |
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149 <a name="l00166"></a>00166 |
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150 <a name="l00167"></a>00167 <span class="comment">//Open the database from the root stream.</span> |
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151 <a name="l00168"></a>00168 iDatabase.OpenL(store,store->Root()); |
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152 <a name="l00169"></a>00169 |
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153 <a name="l00170"></a>00170 <span class="comment">//Lock the database before use. </span> |
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154 <a name="l00171"></a>00171 iDatabase.Begin(); |
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155 <a name="l00172"></a>00172 |
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156 <a name="l00173"></a>00173 <span class="comment">//Create a view on the database view to read/write numbers into it. </span> |
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157 <a name="l00174"></a>00174 RDbView view; |
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158 <a name="l00175"></a>00175 User::LeaveIfError(view.Prepare(iDatabase,TDbQuery(KSQLStatement,EDbCompareNormal))); |
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159 <a name="l00176"></a>00176 User::LeaveIfError(view.EvaluateAll()); |
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160 <a name="l00177"></a>00177 |
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161 <a name="l00178"></a>00178 |
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162 <a name="l00179"></a>00179 <span class="comment">//Insert a new row at the end of the database. </span> |
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163 <a name="l00180"></a>00180 view.InsertL(); |
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164 <a name="l00181"></a>00181 |
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165 <a name="l00182"></a>00182 <span class="comment">//Fill three coloumns with numbers.</span> |
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166 <a name="l00183"></a>00183 view.SetColL(1, num++); |
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167 <a name="l00184"></a>00184 view.SetColL(2, num++); |
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168 <a name="l00185"></a>00185 view.SetColL(3, num++); |
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169 <a name="l00186"></a>00186 view.PutL(); |
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170 <a name="l00187"></a>00187 |
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171 <a name="l00188"></a>00188 <span class="comment">//Close the view. </span> |
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172 <a name="l00189"></a>00189 view.Close(); |
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173 <a name="l00190"></a>00190 |
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174 <a name="l00191"></a>00191 <span class="comment">//Unlock the database after writing. </span> |
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175 <a name="l00192"></a>00192 iDatabase.Commit(); |
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176 <a name="l00193"></a>00193 |
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177 <a name="l00194"></a>00194 <span class="comment">// close the database.</span> |
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178 <a name="l00195"></a>00195 iDatabase.Close(); |
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179 <a name="l00196"></a>00196 |
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180 <a name="l00197"></a>00197 <span class="comment">//Do not commit store: database has taken control of commit.</span> |
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181 <a name="l00198"></a>00198 CleanupStack::PopAndDestroy(store); |
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182 <a name="l00199"></a>00199 |
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183 <a name="l00200"></a>00200 <span class="comment">//Cancel the periodic function once 50 numbers have been written to the database.</span> |
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184 <a name="l00201"></a>00201 <span class="keywordflow">if</span>(num > KLastNum ) |
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185 <a name="l00202"></a>00202 { |
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186 <a name="l00203"></a>00203 iPeriodic->Cancel(); |
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187 <a name="l00204"></a>00204 CActiveScheduler::Stop(); |
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188 <a name="l00205"></a>00205 } |
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189 <a name="l00206"></a>00206 |
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190 <a name="l00207"></a>00207 <span class="preprocessor"> #ifdef USE_SEMAPHORE</span> |
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191 <a name="l00208"></a>00208 <span class="preprocessor"></span> <span class="comment">/*Signal the semaphore and the PeriodicReadFunc() which was </span> |
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192 <a name="l00209"></a>00209 <span class="comment"> waiting on the semaphore is scheduled to run. </span> |
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193 <a name="l00210"></a>00210 <span class="comment"> */</span> |
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194 <a name="l00211"></a>00211 iSemWrite.Signal(); |
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195 <a name="l00212"></a>00212 <span class="preprocessor"> #endif</span> |
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196 <a name="l00213"></a>00213 <span class="preprocessor"></span> } |
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197 <a name="l00214"></a>00214 |
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198 <a name="l00220"></a><a class="code" href="class_c_database.html#e9fea33b26bf2ba7cdad59361ee45221">00220</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#e9fea33b26bf2ba7cdad59361ee45221">CDatabase::ReadfromDatabaseL</a>() |
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199 <a name="l00221"></a>00221 { |
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200 <a name="l00222"></a>00222 _LIT(KTextConsoleTitle, <span class="stringliteral">"ReaderThread"</span>); |
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201 <a name="l00223"></a>00223 <span class="keywordflow">if</span>(!iConsole) |
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202 <a name="l00224"></a>00224 { |
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203 <a name="l00225"></a>00225 iConsole = Console::NewL(KTextConsoleTitle, TSize(KConsFullScreen,KConsFullScreen)); |
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204 <a name="l00226"></a>00226 _LIT(KReading, <span class="stringliteral">"Reading the database.\n"</span>); |
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205 <a name="l00227"></a>00227 iConsole->Printf(KReading); |
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206 <a name="l00228"></a>00228 } |
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207 <a name="l00229"></a>00229 iPeriodic->Start(0, <a class="code" href="transparent_8h.html#c2252065f9b9ad3eb46336220d1672ae">KDelay</a>, TCallBack(<a class="code" href="class_c_database.html#26f8d942e0dc5c8050afd5cbb0d80f18">PeriodicReadL</a>,<span class="keyword">this</span>)); |
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208 <a name="l00230"></a>00230 CActiveScheduler::Start(); |
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209 <a name="l00231"></a>00231 } |
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210 <a name="l00232"></a>00232 |
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211 <a name="l00237"></a><a class="code" href="class_c_database.html#26f8d942e0dc5c8050afd5cbb0d80f18">00237</a> TInt <a class="code" href="class_c_database.html#26f8d942e0dc5c8050afd5cbb0d80f18">CDatabase::PeriodicReadL</a>(TAny* aPtr) |
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212 <a name="l00238"></a>00238 { |
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213 <a name="l00239"></a>00239 <a class="code" href="class_c_database.html">CDatabase</a>* ptr = <span class="keyword">static_cast<</span><a class="code" href="class_c_database.html">CDatabase</a>*<span class="keyword">></span> (aPtr); |
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214 <a name="l00240"></a>00240 ptr-><a class="code" href="class_c_database.html#3546e400216858a7ae560808a9d1465e">PeriodicReadFuncL</a>(); |
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215 <a name="l00241"></a>00241 <span class="keywordflow">return</span> KErrNone; |
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216 <a name="l00242"></a>00242 } |
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217 <a name="l00243"></a>00243 |
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218 <a name="l00248"></a><a class="code" href="class_c_database.html#3546e400216858a7ae560808a9d1465e">00248</a> <span class="keywordtype">void</span> <a class="code" href="class_c_database.html#3546e400216858a7ae560808a9d1465e">CDatabase::PeriodicReadFuncL</a>() |
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219 <a name="l00249"></a>00249 { |
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220 <a name="l00250"></a>00250 <span class="preprocessor"> #ifdef USE_SEMAPHORE</span> |
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221 <a name="l00251"></a>00251 <span class="preprocessor"></span> <span class="comment">//Semaphore waits till it gets a signal from the PeriodicWrite() function. </span> |
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222 <a name="l00252"></a>00252 iSemWrite.Wait(); |
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223 <a name="l00253"></a>00253 <span class="preprocessor"> #endif</span> |
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224 <a name="l00254"></a>00254 <span class="preprocessor"></span> |
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225 <a name="l00255"></a>00255 CFileStore* store = CFileStore::OpenLC(iFsSession,iDbname,EFileRead); |
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226 <a name="l00256"></a>00256 |
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227 <a name="l00257"></a>00257 <span class="comment">//Open the database from the root stream.</span> |
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228 <a name="l00258"></a>00258 iDatabase.OpenL(store,store->Root()); |
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229 <a name="l00259"></a>00259 |
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230 <a name="l00260"></a>00260 <span class="comment">//Lock the database.</span> |
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231 <a name="l00261"></a>00261 iDatabase.Begin(); |
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232 <a name="l00262"></a>00262 |
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233 <a name="l00263"></a>00263 <span class="comment">//Prepare an SQL query to read three numbers from the database. </span> |
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234 <a name="l00264"></a>00264 _LIT(KSQLStatement,<span class="stringliteral">"select Number1,Number2,Number3 from Numbers order by Number1,Number2, Number3"</span>); |
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235 <a name="l00265"></a>00265 |
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236 <a name="l00266"></a>00266 <span class="comment">//Create a view on the database.</span> |
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237 <a name="l00267"></a>00267 RDbView view; |
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238 <a name="l00268"></a>00268 User::LeaveIfError(view.Prepare(iDatabase,TDbQuery(KSQLStatement,EDbCompareNormal))); |
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239 <a name="l00269"></a>00269 User::LeaveIfError(view.EvaluateAll()); |
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240 <a name="l00270"></a>00270 |
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241 <a name="l00271"></a>00271 <span class="comment">//Declare integers to iterate through the database rows. </span> |
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242 <a name="l00272"></a>00272 <span class="keyword">static</span> <span class="keywordtype">int</span> count = 0; |
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243 <a name="l00273"></a>00273 TInt iter = 0; |
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244 <a name="l00274"></a>00274 |
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245 <a name="l00275"></a>00275 <span class="comment">/*Iterate through the database to read only the row which was most recently </span> |
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246 <a name="l00276"></a>00276 <span class="comment"> written by the PeriodicWriteFunc.</span> |
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247 <a name="l00277"></a>00277 <span class="comment"> */</span> |
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248 <a name="l00278"></a>00278 view.FirstL(); |
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249 <a name="l00279"></a>00279 <span class="keywordflow">while</span>( iter < count) |
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250 <a name="l00280"></a>00280 { |
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251 <a name="l00281"></a>00281 view.NextL(); |
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252 <a name="l00282"></a>00282 iter++; |
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253 <a name="l00283"></a>00283 } |
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254 <a name="l00284"></a>00284 count ++ ; |
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255 <a name="l00285"></a>00285 |
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256 <a name="l00286"></a>00286 <span class="comment">//Read the integers from the view and display in console. </span> |
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257 <a name="l00287"></a>00287 view.GetL(); |
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258 <a name="l00288"></a>00288 TInt number1 = view.ColInt(1); |
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259 <a name="l00289"></a>00289 TInt number2 = view.ColInt(2); |
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260 <a name="l00290"></a>00290 TInt number3 = view.ColInt(3); |
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261 <a name="l00291"></a>00291 <span class="comment">//Prepare a row formatter to print the numbers to the console. </span> |
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262 <a name="l00292"></a>00292 _LIT(KRowFormatter, <span class="stringliteral">"\n reading %d \t%d\t%d"</span>); |
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263 <a name="l00293"></a>00293 |
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264 <a name="l00294"></a>00294 iConsole->Printf(KRowFormatter,number1,number2, number3); |
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265 <a name="l00295"></a>00295 |
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266 <a name="l00296"></a>00296 <span class="comment">//Cancel the periodic function after it has read the last number in the database. </span> |
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267 <a name="l00297"></a>00297 <span class="keywordflow">if</span>(number3 >= KLastNum) |
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268 <a name="l00298"></a>00298 { |
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269 <a name="l00299"></a>00299 iPeriodic->Cancel(); |
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270 <a name="l00300"></a>00300 CActiveScheduler::Stop(); |
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271 <a name="l00301"></a>00301 _LIT(KAllRead, <span class="stringliteral">"\nAll the numbers in the database have been read\n"</span>); |
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272 <a name="l00302"></a>00302 iConsole->Printf(KAllRead); |
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273 <a name="l00303"></a>00303 _LIT(KExit, <span class="stringliteral">"Press a key to exit\n"</span>); |
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274 <a name="l00304"></a>00304 iConsole->Printf(KExit); |
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275 <a name="l00305"></a>00305 iConsole->Getch(); |
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276 <a name="l00306"></a>00306 } |
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277 <a name="l00307"></a>00307 <span class="comment">//Close the view. </span> |
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278 <a name="l00308"></a>00308 view.Close(); |
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279 <a name="l00309"></a>00309 |
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280 <a name="l00310"></a>00310 <span class="comment">//Unlock the database. </span> |
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281 <a name="l00311"></a>00311 iDatabase.Commit(); |
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282 <a name="l00312"></a>00312 |
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283 <a name="l00313"></a>00313 iDatabase.Close(); |
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284 <a name="l00314"></a>00314 CleanupStack::PopAndDestroy(store); |
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285 <a name="l00315"></a>00315 } |
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286 </pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Thu Jan 21 10:32:57 2010 for TB10.1 Example Applications by |
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287 <a href="http://www.doxygen.org/index.html"> |
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288 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.3 </small></address> |
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289 </body> |
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290 </html> |