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5 <title>TB9.2 Example Applications: examples/Base/ArraysAndLists/linkedlist/deltaque/src/deltaque.cpp Source File</title> |
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11 <h1>examples/Base/ArraysAndLists/linkedlist/deltaque/src/deltaque.cpp</h1><a href="deltaque_8cpp.html">Go to the documentation of this file.</a><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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12 <a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span> |
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13 <a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span> |
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14 <a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span> |
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15 <a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span> |
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16 <a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span> |
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17 <a name="l00007"></a>00007 <span class="comment">//</span> |
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18 <a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span> |
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19 <a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span> |
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20 <a name="l00010"></a>00010 <span class="comment">//</span> |
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21 <a name="l00011"></a>00011 <span class="comment">// Contributors:</span> |
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22 <a name="l00012"></a>00012 <span class="comment">//</span> |
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23 <a name="l00013"></a>00013 <span class="comment">// Description:</span> |
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24 <a name="l00014"></a>00014 <span class="comment">// Contains the E32Main() function, which executes the example.</span> |
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25 <a name="l00015"></a>00015 <span class="comment">// The example demonstrates the use of the TDeltaQue class, which represents</span> |
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26 <a name="l00016"></a>00016 <span class="comment">// a delta queue.</span> |
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27 <a name="l00017"></a>00017 <span class="comment">// An object of the CPeriodic class generates periodic timer events.</span> |
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28 <a name="l00018"></a>00018 <span class="comment">// Either the tick count is added to the delta queue or</span> |
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29 <a name="l00019"></a>00019 <span class="comment">// elements are removed from the list, depending on the state of the queue.</span> |
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30 <a name="l00020"></a>00020 <span class="comment">// The user can stop the generation of timer events by pressing a key.</span> |
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31 <a name="l00021"></a>00021 <span class="comment">//</span> |
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32 <a name="l00022"></a>00022 |
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33 <a name="l00023"></a>00023 |
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34 <a name="l00024"></a>00024 |
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35 <a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="_i_p_c_2condvar_2condvarlocal_2inc_2userinterface_8h.html">userinterface.h</a>"</span> |
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36 <a name="l00030"></a>00030 |
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37 <a name="l00031"></a>00031 LOCAL_D CConsoleBase* console; |
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38 <a name="l00032"></a>00032 |
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39 <a name="l00033"></a>00033 LOCAL_C <span class="keywordtype">void</span> DoStartL(); |
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40 <a name="l00034"></a>00034 LOCAL_C <span class="keywordtype">void</span> CallExampleL(); |
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41 <a name="l00035"></a>00035 |
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42 <a name="l00036"></a>00036 LOCAL_C <span class="keywordtype">void</span> DoStartL() |
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43 <a name="l00037"></a>00037 { |
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44 <a name="l00038"></a>00038 <span class="comment">// Create and install the active scheduler.</span> |
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45 <a name="l00039"></a>00039 CActiveScheduler* scheduler = <span class="keyword">new</span> (ELeave) CActiveScheduler(); |
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46 <a name="l00040"></a>00040 CleanupStack::PushL(scheduler); |
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47 <a name="l00041"></a>00041 CActiveScheduler::Install(scheduler); |
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48 <a name="l00042"></a>00042 |
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49 <a name="l00043"></a>00043 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextExample, <span class="stringliteral">"Delta Queue Example\nCreating and starting timer object\n"</span>); |
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50 <a name="l00044"></a>00044 console->Printf(KTextExample); |
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51 <a name="l00045"></a>00045 |
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52 <a name="l00046"></a>00046 <span class="comment">// Create an object of the CTimerEntry class.</span> |
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53 <a name="l00047"></a>00047 <a class="code" href="class_c_timer_entry.html">CTimerEntry</a>* entry = <a class="code" href="class_c_timer_entry.html#ae9239b3945aa446c00506024551a8268">CTimerEntry::NewL</a>(console); |
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54 <a name="l00048"></a>00048 CleanupStack::PushL(entry); |
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55 <a name="l00049"></a>00049 |
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56 <a name="l00050"></a>00050 <span class="comment">// Create an object of the CUserInterface class.</span> |
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57 <a name="l00051"></a>00051 <a class="code" href="class_c_user_interface.html">CUserInterface</a>* interface = <a class="code" href="class_c_user_interface.html#acb29c660858994d24137bb413fee4af8">CUserInterface::NewL</a>(console,entry); |
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58 <a name="l00052"></a>00052 CleanupStack::PushL(interface); |
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59 <a name="l00053"></a>00053 |
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60 <a name="l00054"></a>00054 <span class="comment">// Wait for a key press from the user.</span> |
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61 <a name="l00055"></a>00055 <span class="comment">// Generate an asynchronous read request.</span> |
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62 <a name="l00056"></a>00056 interface-><a class="code" href="class_c_user_interface.html#a9f9158c56f74b7c8da6c527f346c9952">ReadFunc</a>(); |
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63 <a name="l00057"></a>00057 |
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64 <a name="l00058"></a>00058 <span class="comment">// Start the active scheduler.</span> |
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65 <a name="l00059"></a>00059 CActiveScheduler::Start(); |
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66 <a name="l00060"></a>00060 |
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67 <a name="l00061"></a>00061 <span class="comment">// Destroy the objects in the cleanup stack.</span> |
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68 <a name="l00062"></a>00062 CleanupStack::PopAndDestroy(3,scheduler); <span class="comment">// interface, entry, scheduler.</span> |
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69 <a name="l00063"></a>00063 } |
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70 <a name="l00064"></a>00064 |
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71 <a name="l00065"></a>00065 GLDEF_C TInt E32Main() <span class="comment">// main function called by E32</span> |
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72 <a name="l00066"></a>00066 { |
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73 <a name="l00067"></a>00067 __UHEAP_MARK; |
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74 <a name="l00068"></a>00068 CTrapCleanup* cleanup=CTrapCleanup::New(); <span class="comment">// get clean-up stack</span> |
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75 <a name="l00069"></a>00069 TRAPD(error, CallExampleL()); <span class="comment">// more initialization, then do example</span> |
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76 <a name="l00070"></a>00070 <span class="keyword">delete</span> cleanup; <span class="comment">// destroy clean-up stack</span> |
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77 <a name="l00071"></a>00071 __ASSERT_ALWAYS(!error, User::Panic(KTxtEPOC32EX, error)); |
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78 <a name="l00072"></a>00072 __UHEAP_MARKEND; |
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79 <a name="l00073"></a>00073 <span class="keywordflow">return</span> 0; <span class="comment">// and return</span> |
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80 <a name="l00074"></a>00074 } |
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81 <a name="l00075"></a>00075 |
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82 <a name="l00076"></a>00076 LOCAL_C <span class="keywordtype">void</span> CallExampleL() <span class="comment">// initialize and call example code under cleanup stack</span> |
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83 <a name="l00077"></a>00077 { |
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84 <a name="l00078"></a>00078 console=Console::NewL(KTxtExampleCode, TSize(KConsFullScreen, KConsFullScreen)); |
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85 <a name="l00079"></a>00079 CleanupStack::PushL(console); |
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86 <a name="l00080"></a>00080 TRAPD(error, DoStartL()); <span class="comment">// perform example function</span> |
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87 <a name="l00081"></a>00081 <span class="keywordflow">if</span> (error) |
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88 <a name="l00082"></a>00082 console->Printf(KFormatFailed, error); |
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89 <a name="l00083"></a>00083 <span class="keywordflow">else</span> |
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90 <a name="l00084"></a>00084 console->Printf(KTxtOK); |
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91 <a name="l00085"></a>00085 console->Printf(KTextPressAnyKey); |
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92 <a name="l00086"></a>00086 console->Getch(); <span class="comment">// get and ignore character</span> |
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93 <a name="l00087"></a>00087 CleanupStack::PopAndDestroy(); <span class="comment">// close console</span> |
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94 <a name="l00088"></a>00088 } |
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95 </pre></div></div> |
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