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1 /* |
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2 * Copyright (c) 2007-2008 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: Thin callback wrapper |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 |
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21 // include guard for the whole file content |
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22 #ifndef __SHWAUTOPTR_H__ |
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23 #define __SHWAUTOPTR_H__ |
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24 |
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25 /** |
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26 * TShwAutoPtr, implementation of auto_ptr |
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27 */ |
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28 template< class T > |
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29 class TShwAutoPtr |
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30 { |
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31 public: |
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32 |
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33 /** |
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34 * Default constructor |
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35 */ |
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36 TShwAutoPtr() |
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37 : iPtr( NULL ) |
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38 {} |
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39 |
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40 /** |
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41 * Constructor |
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42 * @param aPtr the pointer to own |
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43 */ |
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44 TShwAutoPtr( T* aPtr = 0 ) |
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45 : iPtr( aPtr ) |
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46 {} |
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47 |
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48 /** |
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49 * Copy constructor, transfers ownership |
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50 * @param aPtr the pointer to transfer |
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51 */ |
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52 TShwAutoPtr( TShwAutoPtr< T >& aPtr ) |
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53 : iPtr( aPtr.Release() ) |
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54 {} |
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55 |
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56 /** |
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57 * Destructor, releases the pointer |
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58 */ |
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59 ~TShwAutoPtr() |
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60 { |
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61 delete iPtr; |
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62 } |
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63 |
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64 /** |
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65 * Dereference |
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66 */ |
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67 T& operator*() const |
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68 { |
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69 return *iPtr; |
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70 } |
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71 |
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72 /** |
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73 * Take address of pointed class |
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74 */ |
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75 T* operator &() |
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76 { |
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77 return iPtr; |
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78 } |
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79 |
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80 /** |
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81 * Dereference |
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82 */ |
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83 T* operator->() const |
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84 { |
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85 return iPtr; |
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86 } |
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87 |
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88 /** |
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89 * Gives the pointer to the caller, ownership stays |
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90 * @return the pointer held, ownership does not transfer |
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91 */ |
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92 T* Pointer() const |
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93 { |
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94 return iPtr; |
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95 } |
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96 |
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97 /** |
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98 * Assignment from one pointer to another, ownership transfers |
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99 * @param the auto pointer to hold |
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100 * @return reference to this so that assignments can be chained |
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101 */ |
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102 TShwAutoPtr<T>& operator=( TShwAutoPtr<T>& aCopy ) |
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103 { |
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104 if( this != &aCopy ) |
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105 { |
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106 // transfer the pointer |
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107 SetPointer( aCopy.Release() ); |
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108 } |
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109 return *this; |
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110 } |
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111 |
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112 /** |
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113 * Sets the pointer, ownership is taken |
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114 * @param the pointer to hold |
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115 */ |
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116 void SetPointer( T* aPointer ) |
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117 { |
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118 // release the old (possible) pointer |
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119 delete iPtr; |
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120 iPtr = aPointer; |
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121 } |
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122 |
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123 /** |
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124 * Release, returns the ownership to the caller |
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125 * @return the pointer held, ownership transfers |
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126 */ |
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127 T* Release() |
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128 { |
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129 T* temp = iPtr; |
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130 iPtr = 0; |
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131 return temp; |
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132 } |
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133 |
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134 private: |
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135 |
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136 /// Own: the pointer to hold |
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137 T* iPtr; |
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138 |
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139 }; |
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140 |
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141 #endif // __SHWAUTOPTR_H__ |