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8 <h1>examples/Base/IPC/Async/RunComplete/RunComplete.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 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">// Demonstrates asynchronous keyboard processing with messenger program.</span> |
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22 <a name="l00015"></a>00015 <span class="comment">// Uses a single CMessageTimer active object which runs until completion.</span> |
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23 <a name="l00016"></a>00016 <span class="comment">//</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 "CommonFramework.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">// panics</span> |
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28 <a name="l00021"></a>00021 <span class="keyword">enum</span> |
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29 <a name="l00022"></a>00022 { |
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30 <a name="l00023"></a>00023 EPanicAlreadyActive=1000, |
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31 <a name="l00024"></a>00024 }; |
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32 <a name="l00025"></a>00025 |
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33 <a name="l00026"></a>00026 |
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34 <a name="l00028"></a>00028 <span class="comment">//</span> |
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35 <a name="l00029"></a>00029 <span class="comment">// -----> CTimedMessenger (definition)</span> |
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36 <a name="l00030"></a>00030 <span class="comment">//</span> |
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37 <a name="l00032"></a>00032 <span class="comment"></span><span class="keyword">class </span>CTimedMessenger : <span class="keyword">public</span> CTimer |
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38 <a name="l00033"></a>00033 { |
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39 <a name="l00034"></a>00034 <span class="keyword">public</span>: |
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40 <a name="l00035"></a>00035 <span class="comment">// Construction</span> |
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41 <a name="l00036"></a>00036 CTimedMessenger(); |
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42 <a name="l00037"></a>00037 <span class="comment">// Destruction</span> |
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43 <a name="l00038"></a>00038 ~CTimedMessenger(); |
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44 <a name="l00039"></a>00039 |
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45 <a name="l00040"></a>00040 <span class="keyword">public</span>: |
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46 <a name="l00041"></a>00041 <span class="comment">// Static construction</span> |
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47 <a name="l00042"></a>00042 <span class="keyword">static</span> CTimedMessenger* NewLC(<span class="keyword">const</span> TDesC& aGreeting, |
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48 <a name="l00043"></a>00043 TInt aTicksRequested, |
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49 <a name="l00044"></a>00044 TInt aTicksInterval |
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50 <a name="l00045"></a>00045 ); |
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51 <a name="l00046"></a>00046 <span class="keyword">static</span> CTimedMessenger* NewL(<span class="keyword">const</span> TDesC& aGreeting, |
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52 <a name="l00047"></a>00047 TInt aTicksRequested, |
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53 <a name="l00048"></a>00048 TInt aTicksInterval |
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54 <a name="l00049"></a>00049 ); |
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55 <a name="l00050"></a>00050 |
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56 <a name="l00051"></a>00051 <span class="keyword">public</span>: |
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57 <a name="l00052"></a>00052 <span class="comment">// Second phase construction</span> |
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58 <a name="l00053"></a>00053 <span class="keywordtype">void</span> ConstructL(<span class="keyword">const</span> TDesC& aGreeting, |
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59 <a name="l00054"></a>00054 TInt aTicksRequested, |
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60 <a name="l00055"></a>00055 TInt aTicksInterval |
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61 <a name="l00056"></a>00056 ); |
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62 <a name="l00057"></a>00057 |
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63 <a name="l00058"></a>00058 <span class="comment">// issue request</span> |
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64 <a name="l00059"></a>00059 <span class="keywordtype">void</span> IssueRequest(); |
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65 <a name="l00060"></a>00060 |
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66 <a name="l00061"></a>00061 <span class="comment">// Cancel request</span> |
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67 <a name="l00062"></a>00062 <span class="comment">// Defined as pure virtual by CActive;</span> |
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68 <a name="l00063"></a>00063 <span class="comment">// implementation provided by this class.</span> |
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69 <a name="l00064"></a>00064 <span class="keywordtype">void</span> DoCancel(); |
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70 <a name="l00065"></a>00065 |
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71 <a name="l00066"></a>00066 <span class="comment">// service completed request.</span> |
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72 <a name="l00067"></a>00067 <span class="comment">// Defined as pure virtual by CActive;</span> |
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73 <a name="l00068"></a>00068 <span class="comment">// implementation provided by this class.</span> |
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74 <a name="l00069"></a>00069 <span class="keywordtype">void</span> RunL(); |
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75 <a name="l00070"></a>00070 |
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76 <a name="l00071"></a>00071 <span class="keyword">public</span>: |
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77 <a name="l00072"></a>00072 <span class="comment">// data members defined by this class</span> |
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78 <a name="l00073"></a>00073 TBufC<20> iGreeting; <span class="comment">// Text of the greeting.</span> |
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79 <a name="l00074"></a>00074 TInt iTicksRequested; <span class="comment">// Total number of greetings CTimedMessenger</span> |
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80 <a name="l00075"></a>00075 <span class="comment">// will emit.</span> |
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81 <a name="l00076"></a>00076 TInt iTicksInterval; <span class="comment">// Number of seconds between each greeting.</span> |
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82 <a name="l00077"></a>00077 TInt iTicksDone; <span class="comment">// Number of greetings issued so far.</span> |
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83 <a name="l00078"></a>00078 }; |
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84 <a name="l00079"></a>00079 |
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85 <a name="l00080"></a>00080 |
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86 <a name="l00082"></a>00082 <span class="comment">//</span> |
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87 <a name="l00083"></a>00083 <span class="comment">// -----> CExampleScheduler (definition)</span> |
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88 <a name="l00084"></a>00084 <span class="comment">//</span> |
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89 <a name="l00086"></a>00086 <span class="comment"></span><span class="keyword">class </span>CExampleScheduler : <span class="keyword">public</span> CActiveScheduler |
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90 <a name="l00087"></a>00087 { |
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91 <a name="l00088"></a>00088 <span class="keyword">public</span>: |
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92 <a name="l00089"></a>00089 <span class="keywordtype">void</span> Error (TInt aError) <span class="keyword">const</span>; |
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93 <a name="l00090"></a>00090 }; |
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94 <a name="l00091"></a>00091 |
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95 <a name="l00092"></a>00092 |
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96 <a name="l00094"></a>00094 <span class="comment">//</span> |
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97 <a name="l00095"></a>00095 <span class="comment">// -----> CTimedMessenger (implementation)</span> |
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98 <a name="l00096"></a>00096 <span class="comment">//</span> |
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99 <a name="l00098"></a>00098 <span class="comment"></span>CTimedMessenger::CTimedMessenger() |
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100 <a name="l00099"></a>00099 : CTimer(CActive::EPriorityStandard) |
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101 <a name="l00100"></a>00100 <span class="comment">// Construct standard-priority active object</span> |
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102 <a name="l00101"></a>00101 {}; |
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103 <a name="l00102"></a>00102 |
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104 <a name="l00103"></a>00103 CTimedMessenger* CTimedMessenger::NewLC(<span class="keyword">const</span> TDesC& aGreeting, |
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105 <a name="l00104"></a>00104 TInt aTicksRequested, |
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106 <a name="l00105"></a>00105 TInt aTicksInterval |
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107 <a name="l00106"></a>00106 ) |
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108 <a name="l00107"></a>00107 { |
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109 <a name="l00108"></a>00108 CTimedMessenger* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CTimedMessenger; |
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110 <a name="l00109"></a>00109 CleanupStack::PushL(<span class="keyword">self</span>); |
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111 <a name="l00110"></a>00110 <span class="keyword">self</span>->ConstructL(aGreeting,aTicksRequested,aTicksInterval); |
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112 <a name="l00111"></a>00111 <span class="keywordflow">return</span> <span class="keyword">self</span>; |
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113 <a name="l00112"></a>00112 } |
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114 <a name="l00113"></a>00113 |
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115 <a name="l00114"></a>00114 CTimedMessenger* CTimedMessenger::NewL(<span class="keyword">const</span> TDesC& aGreeting, |
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116 <a name="l00115"></a>00115 TInt aTicksRequested, |
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117 <a name="l00116"></a>00116 TInt aTicksInterval |
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118 <a name="l00117"></a>00117 ) |
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119 <a name="l00118"></a>00118 { |
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120 <a name="l00119"></a>00119 CTimedMessenger* <span class="keyword">self</span> = <a class="code" href="class_c_thread_server.html#7c41592480f2c412599c332f52a61347">NewLC</a>(aGreeting,aTicksRequested,aTicksInterval); |
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121 <a name="l00120"></a>00120 CleanupStack::Pop(); |
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122 <a name="l00121"></a>00121 <span class="keywordflow">return</span> <span class="keyword">self</span>; |
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123 <a name="l00122"></a>00122 } |
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124 <a name="l00123"></a>00123 |
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125 <a name="l00124"></a>00124 <span class="keywordtype">void</span> CTimedMessenger::ConstructL(<span class="keyword">const</span> TDesC& aGreeting, |
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126 <a name="l00125"></a>00125 TInt aTicksRequested, |
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127 <a name="l00126"></a>00126 TInt aTicksInterval |
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128 <a name="l00127"></a>00127 ) |
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129 <a name="l00128"></a>00128 { |
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130 <a name="l00129"></a>00129 <span class="comment">// Base class second-phase construction.</span> |
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131 <a name="l00130"></a>00130 CTimer::ConstructL(); |
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132 <a name="l00131"></a>00131 <span class="comment">// Set members from arguments</span> |
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133 <a name="l00132"></a>00132 iGreeting = aGreeting; <span class="comment">// Set greeting text.</span> |
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134 <a name="l00133"></a>00133 iTicksRequested = aTicksRequested; <span class="comment">// Ticks requested</span> |
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135 <a name="l00134"></a>00134 iTicksInterval = aTicksInterval; <span class="comment">// Interval between ticks</span> |
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136 <a name="l00135"></a>00135 <span class="comment">// Add active object to active scheduler</span> |
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137 <a name="l00136"></a>00136 CActiveScheduler::Add(<span class="keyword">this</span>); |
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138 <a name="l00137"></a>00137 } |
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139 <a name="l00138"></a>00138 |
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140 <a name="l00139"></a>00139 |
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141 <a name="l00140"></a>00140 CTimedMessenger::~CTimedMessenger() |
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142 <a name="l00141"></a>00141 { |
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143 <a name="l00142"></a>00142 <span class="comment">// Make sure we're cancelled</span> |
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144 <a name="l00143"></a>00143 Cancel(); |
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145 <a name="l00144"></a>00144 } |
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146 <a name="l00145"></a>00145 |
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147 <a name="l00146"></a>00146 <span class="keywordtype">void</span> CTimedMessenger::DoCancel() |
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148 <a name="l00147"></a>00147 { |
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149 <a name="l00148"></a>00148 <span class="comment">// Base class</span> |
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150 <a name="l00149"></a>00149 CTimer::DoCancel(); |
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151 <a name="l00150"></a>00150 <span class="comment">// Reset this variable - needed if the object is re-activated later</span> |
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152 <a name="l00151"></a>00151 iTicksDone = 0; |
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153 <a name="l00152"></a>00152 <span class="comment">// Tell user</span> |
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154 <a name="l00153"></a>00153 _LIT(KMsgCancelled,<span class="stringliteral">"Outstanding Messenger request cancelled\n"</span>); |
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155 <a name="l00154"></a>00154 <a class="code" href="dbllist_8cpp.html#d789d40251baeb2f60e118de4856583d">console</a>->Printf(KMsgCancelled); |
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156 <a name="l00155"></a>00155 } |
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157 <a name="l00156"></a>00156 |
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158 <a name="l00157"></a>00157 <span class="keywordtype">void</span> CTimedMessenger::IssueRequest() |
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159 <a name="l00158"></a>00158 { |
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160 <a name="l00159"></a>00159 <span class="comment">// There should never be an outstanding request at this point.</span> |
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161 <a name="l00160"></a>00160 _LIT(KMsgAlreadyActive,<span class="stringliteral">"Is already Active"</span>); |
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162 <a name="l00161"></a>00161 __ASSERT_ALWAYS(!IsActive(),User::Panic(KMsgAlreadyActive,EPanicAlreadyActive)); |
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163 <a name="l00162"></a>00162 <span class="comment">// Request another wait</span> |
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164 <a name="l00163"></a>00163 CTimer::After( iTicksInterval*1000000); |
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165 <a name="l00164"></a>00164 } |
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166 <a name="l00165"></a>00165 |
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167 <a name="l00166"></a>00166 <span class="keywordtype">void</span> CTimedMessenger::RunL() |
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168 <a name="l00167"></a>00167 { |
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169 <a name="l00168"></a>00168 <span class="comment">// Handle request completion</span> |
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170 <a name="l00169"></a>00169 <span class="comment">// One more tick done</span> |
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171 <a name="l00170"></a>00170 iTicksDone++; |
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172 <a name="l00171"></a>00171 <span class="comment">// Print greeting</span> |
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173 <a name="l00172"></a>00172 _LIT(KFormatString,<span class="stringliteral">"%S \n"</span>); |
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174 <a name="l00173"></a>00173 <a class="code" href="dbllist_8cpp.html#d789d40251baeb2f60e118de4856583d">console</a>->Printf(KFormatString,&iGreeting); |
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175 <a name="l00174"></a>00174 <span class="comment">// Issue new request, or stop if we have reached the limit</span> |
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176 <a name="l00175"></a>00175 <span class="keywordflow">if</span> (iTicksDone < iTicksRequested) |
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177 <a name="l00176"></a>00176 { |
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178 <a name="l00177"></a>00177 IssueRequest(); |
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179 <a name="l00178"></a>00178 } |
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180 <a name="l00179"></a>00179 <span class="keywordflow">else</span> |
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181 <a name="l00180"></a>00180 { |
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182 <a name="l00181"></a>00181 _LIT(KMsgFinished,<span class="stringliteral">"Messenger finished \n"</span>); |
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183 <a name="l00182"></a>00182 <a class="code" href="dbllist_8cpp.html#d789d40251baeb2f60e118de4856583d">console</a>->Printf(KMsgFinished); |
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184 <a name="l00183"></a>00183 <span class="comment">// Reset this variable - needed if the object is re-activated later</span> |
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185 <a name="l00184"></a>00184 iTicksDone=0; |
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186 <a name="l00185"></a>00185 <span class="comment">// Can now stop the active scheduler</span> |
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187 <a name="l00186"></a>00186 CActiveScheduler::Stop(); |
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188 <a name="l00187"></a>00187 } |
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189 <a name="l00188"></a>00188 } |
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190 <a name="l00189"></a>00189 |
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191 <a name="l00190"></a>00190 |
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192 <a name="l00192"></a>00192 <span class="comment">//</span> |
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193 <a name="l00193"></a>00193 <span class="comment">// -----> CExampleScheduler (implementation)</span> |
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194 <a name="l00194"></a>00194 <span class="comment">//</span> |
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195 <a name="l00196"></a>00196 <span class="comment"></span><span class="keywordtype">void</span> CExampleScheduler::Error(TInt aError)<span class="keyword"> const</span> |
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196 <a name="l00197"></a>00197 <span class="keyword"> </span>{ |
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197 <a name="l00198"></a>00198 _LIT(KMsgSchedErr,<span class="stringliteral">"CExampleScheduler-error"</span>); |
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198 <a name="l00199"></a>00199 User::Panic(KMsgSchedErr,aError); |
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199 <a name="l00200"></a>00200 } |
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200 <a name="l00201"></a>00201 |
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201 <a name="l00202"></a>00202 |
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202 <a name="l00204"></a>00204 <span class="comment">//</span> |
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203 <a name="l00205"></a>00205 <span class="comment">// Do the example</span> |
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204 <a name="l00206"></a>00206 <span class="comment">//</span> |
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205 <a name="l00208"></a>00208 <span class="comment"></span>LOCAL_C <span class="keywordtype">void</span> doExampleL() |
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206 <a name="l00209"></a>00209 { |
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207 <a name="l00210"></a>00210 <span class="comment">// Construct and install the active scheduler</span> |
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208 <a name="l00211"></a>00211 CExampleScheduler* exampleScheduler = <span class="keyword">new</span> (ELeave) CExampleScheduler; |
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209 <a name="l00212"></a>00212 |
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210 <a name="l00213"></a>00213 <span class="comment">// Push onto the cleanup stack</span> |
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211 <a name="l00214"></a>00214 CleanupStack::PushL(exampleScheduler); |
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212 <a name="l00215"></a>00215 |
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213 <a name="l00216"></a>00216 <span class="comment">// Install as the active scheduler</span> |
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214 <a name="l00217"></a>00217 CActiveScheduler::Install(exampleScheduler); |
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215 <a name="l00218"></a>00218 |
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216 <a name="l00219"></a>00219 <span class="comment">// Create a CTimedMessenger active object which will emit 3 messages</span> |
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217 <a name="l00220"></a>00220 <span class="comment">// with an interval of 2 seconds between messages</span> |
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218 <a name="l00221"></a>00221 _LIT(KMsgExplanation,<span class="stringliteral">"A single CMessageTimer active object which runs until completion\n\n"</span>); |
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219 <a name="l00222"></a>00222 <a class="code" href="dbllist_8cpp.html#d789d40251baeb2f60e118de4856583d">console</a>->Printf(KMsgExplanation); |
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220 <a name="l00223"></a>00223 _LIT(KMsgGoodMorning,<span class="stringliteral">"Good Morning!"</span>); |
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221 <a name="l00224"></a>00224 CTimedMessenger* myTimedMessage = CTimedMessenger::NewLC(KMsgGoodMorning,3,2); |
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222 <a name="l00225"></a>00225 |
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223 <a name="l00226"></a>00226 <span class="comment">// Issue the first request</span> |
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224 <a name="l00227"></a>00227 myTimedMessage->IssueRequest(); |
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225 <a name="l00228"></a>00228 |
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226 <a name="l00229"></a>00229 <span class="comment">// Main part of program is a wait loop</span> |
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227 <a name="l00230"></a>00230 <span class="comment">// This function completes when the scheduler stops</span> |
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228 <a name="l00231"></a>00231 CActiveScheduler::Start(); |
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229 <a name="l00232"></a>00232 |
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230 <a name="l00233"></a>00233 <span class="comment">// Remove from the cleanup stack and destroy:</span> |
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231 <a name="l00234"></a>00234 <span class="comment">// 1. the CTimedMessenger active object</span> |
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232 <a name="l00235"></a>00235 <span class="comment">// 2. exampleScheduler</span> |
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233 <a name="l00236"></a>00236 CleanupStack::PopAndDestroy(2); |
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234 <a name="l00237"></a>00237 } |
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235 <a name="l00238"></a>00238 |
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236 </pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Thu Jan 21 10:32:56 2010 for TB10.1 Example Applications by |
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237 <a href="http://www.doxygen.org/index.html"> |
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238 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.3 </small></address> |
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239 </body> |
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240 </html> |