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1 /* |
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2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Class used to implement nested active object used to handle |
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15 * deletion of large number of messages by breaking them into smaller chunks |
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16 * |
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17 */ |
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18 |
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19 #ifndef __NESTED_AO_H__ |
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20 #define __NESTED_AO_H__ |
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21 |
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22 // Include Files |
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23 |
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24 |
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25 #include <e32base.h> |
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26 |
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27 |
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28 class MDeletionHandler |
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29 { |
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30 public: |
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31 enum TState |
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32 { |
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33 EInProgress, |
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34 EFree |
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35 }; |
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36 //Deletes messages from aStartIndex KSizeOfChunk at a time |
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37 virtual TBool DeleteMessagesInChunksL( TInt aStartIndex ) = 0; |
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38 }; |
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39 //Time interval between issuing 2 requests to delete messages |
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40 const TInt KWaitIntervalInMicroSecs=500; |
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41 //Maximum number of messages deleted in one go |
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42 const TInt KSizeOfChunk=10; |
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43 |
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44 NONSHARABLE_CLASS ( CNestedAO ) : public CTimer |
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45 { |
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46 public: |
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47 |
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48 static CNestedAO* NewL( MDeletionHandler& aDeletionHandler ); |
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49 virtual ~CNestedAO(); |
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50 // -------------------------------------------------------------------------- |
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51 // CNestedAO::DeleteMessagesAsync |
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52 // Used to delete messages asynchronously |
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53 // Deleting a small number of messages at a time |
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54 // ------------ |
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55 void DeleteMessagesAsync(); |
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56 // -------------------------------------------------------------------------- |
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57 // CNestedAO::Rc |
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58 // Used to return the iStatus return value |
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59 // ------------ |
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60 TInt Rc() { return iRc; } |
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61 |
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62 private: |
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63 CNestedAO( MDeletionHandler& aDeletionHandler ); |
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64 void ConstructL(); |
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65 |
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66 // inherited from CActive |
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67 virtual void RunL(); |
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68 virtual void DoCancel(); |
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69 // -------------------------------------------------------------------------- |
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70 // CNestedAO::Stop |
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71 // Stops the scheduler from running |
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72 // Called after all messages are processed |
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73 // or in error condition |
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74 // ------------ |
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75 void Stop(); |
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76 |
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77 private: |
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78 CActiveSchedulerWait* iNestedWait; |
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79 MDeletionHandler& iDeletionHandler; |
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80 TInt iDeletionIndex; |
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81 TInt iRc; |
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82 }; |
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83 |
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84 |
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85 #endif //__NESTED_AO_H__ |