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1 // Copyright (c) 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 the License "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 // f32\sfile\sf_pool.cpp |
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15 // |
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16 // |
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17 |
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18 #include "sf_pool.h" |
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19 #ifdef SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION |
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20 #include "sf_notifier.h" |
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21 #endif //SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION |
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22 |
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23 //=====CFsPool============================= |
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24 |
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25 template <class T> |
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26 CFsPool<T>* CFsPool<T>::New(TInt aPoolSize) |
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27 { |
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28 CFsPool<T>* pool = new CFsPool<T>(); |
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29 if(!pool) |
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30 return NULL; |
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31 |
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32 TInt r = pool->Construct(aPoolSize); |
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33 if(r!=KErrNone) |
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34 { |
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35 delete pool; |
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36 return NULL; |
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37 } |
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38 else |
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39 return pool; |
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40 } |
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41 |
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42 |
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43 template <class T> |
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44 CFsPool<T>::CFsPool() |
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45 { |
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46 } |
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47 |
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48 template <class T> |
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49 TInt CFsPool<T>::Construct(TInt aPoolSize) |
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50 { |
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51 TInt r = iPoolLock.CreateLocal(KNotificationPoolSize); |
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52 if(r != KErrNone) |
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53 return r; |
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54 |
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55 r = iFreeList.Reserve(KNotificationPoolSize); |
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56 if(r != KErrNone) |
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57 return r; |
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58 |
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59 TInt i = 0; |
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60 while(i < aPoolSize) |
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61 { |
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62 T* t = T::New(); |
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63 if(!t) |
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64 { |
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65 return KErrNoMemory; |
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66 } |
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67 iFreeList.Append(t); |
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68 i++; |
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69 } |
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70 |
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71 return KErrNone; |
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72 } |
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73 |
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74 //This should only be called by the Manager when it holds |
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75 //the manager's write lock meaning that all of the |
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76 //blocks should be unallocated |
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77 template <class T> |
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78 CFsPool<T>::~CFsPool() |
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79 { |
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80 for(TInt i=0; i < iFreeList.Count(); i++) |
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81 { |
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82 delete iFreeList[i]; |
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83 } |
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84 iFreeList.Close(); |
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85 } |
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86 |
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87 |
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88 template <class T> |
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89 T* CFsPool<T>::Allocate() |
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90 { |
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91 Lock(); //Waits when there are no free blocks left |
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92 |
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93 TInt lastIndex = iFreeList.Count()-1; |
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94 T* t = iFreeList[lastIndex]; |
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95 iFreeList.Remove(lastIndex); |
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96 |
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97 return t; |
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98 } |
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99 |
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100 template <class T> |
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101 void CFsPool<T>::Free(T* aBlock) |
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102 { |
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103 iFreeList.Append(aBlock); |
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104 Unlock(); |
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105 } |
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106 |
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107 template <class T> |
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108 void CFsPool<T>::Lock() |
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109 { |
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110 iPoolLock.Wait(); |
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111 } |
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112 |
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113 template <class T> |
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114 void CFsPool<T>::Unlock() |
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115 { |
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116 iPoolLock.Signal(); |
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117 } |
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118 |
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119 #ifdef SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION |
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120 //This is needed here because the compiler needs to know which types will be |
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121 //instantiating the template (because it's in a separate file) |
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122 template class CFsPool<CFsNotificationBlock>; |
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123 #endif //SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION |
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124 |