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1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #ifndef __MMFFIFO_H_ |
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17 #define __MMFFIFO_H_ |
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18 |
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19 // standard EPOC include header files |
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20 #include <e32base.h> |
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21 #include <e32std.h> |
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22 |
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23 |
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24 /** |
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25 Class for storing stream data |
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26 */ |
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27 class TMMFFifoItemBase |
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28 { |
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29 public: |
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30 static const TInt iOffset; |
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31 private: |
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32 TSglQueLink iSlink; |
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33 }; |
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34 |
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35 template<class T> |
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36 class TMMFFifoItem : public TMMFFifoItemBase |
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37 { |
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38 public: |
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39 inline TMMFFifoItem(T& aData); |
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40 inline T& GetData(); |
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41 private: |
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42 T& iData; |
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43 }; |
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44 |
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45 /** |
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46 Class for processing stream data queue (add, get, remove etc) |
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47 */ |
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48 class CMMFFifoBase : public CBase |
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49 { |
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50 public: |
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51 virtual ~CMMFFifoBase(); |
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52 TBool IsEmpty(); |
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53 void AddToFifo(TMMFFifoItemBase& aItem); |
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54 protected: |
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55 CMMFFifoBase(); |
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56 void RemoveFirstItemBase(); |
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57 TMMFFifoItemBase* GetBase(); |
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58 private: |
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59 TSglQue<TMMFFifoItemBase> iFifo; |
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60 TSglQueIter<TMMFFifoItemBase> iFifoIter; |
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61 }; |
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62 |
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63 template<class T> |
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64 class CMMFFifo : public CMMFFifoBase |
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65 { |
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66 public: |
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67 inline void RemoveFirstItem(); |
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68 inline TMMFFifoItem<T>* Get(); |
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69 }; |
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70 |
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71 |
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72 template <class T> |
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73 TMMFFifoItem<T>::TMMFFifoItem(T& aData) |
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74 : iData(aData) |
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75 {} |
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76 |
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77 template <class T> |
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78 T& TMMFFifoItem<T>::GetData() |
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79 { return iData; } |
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80 |
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81 // |
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82 |
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83 template <class T> |
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84 void CMMFFifo<T>::RemoveFirstItem() |
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85 { RemoveFirstItemBase(); } |
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86 |
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87 template <class T> |
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88 inline TMMFFifoItem<T>* CMMFFifo<T>::Get() |
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89 { return STATIC_CAST(TMMFFifoItem<T>*, GetBase()); } |
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90 |
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91 |
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92 #endif |