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1 // Copyright (c) 1995-2009 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 // e32\euser\us_ref.cpp |
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15 // |
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16 // |
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17 |
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18 #include "us_std.h" |
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19 |
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20 |
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21 |
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22 /** |
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23 Frees the memory holding the contained object. |
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24 */ |
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25 EXPORT_C void RRefBase::Free() |
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26 { |
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27 |
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28 if (iPtr) |
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29 { |
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30 if (--iPtr[-1]==0) |
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31 User::Free(iPtr-1); |
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32 iPtr=NULL; |
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33 } |
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34 } |
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35 |
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36 |
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37 |
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38 |
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39 /** |
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40 Creates a copy of an object, which is to be contained by |
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41 this reference object. |
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42 |
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43 @param aPtr A pointer to memory holding a copy of the object. |
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44 @param aSize The size of the memory required to hold the object. |
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45 */ |
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46 EXPORT_C void RRefBase::DoAlloc(const TAny *aPtr,TInt aSize) |
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47 { |
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48 |
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49 __ASSERT_ALWAYS(aSize>=0,Panic(ERefAllocSizeNegative)); |
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50 Free(); |
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51 iPtr=(TInt *)User::Alloc(aSize+sizeof(TInt)); |
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52 if (iPtr!=NULL) |
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53 { |
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54 iPtr++; |
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55 iPtr[-1]=1; |
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56 Mem::Copy(iPtr,aPtr,aSize); |
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57 } |
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58 } |
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59 |
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60 |
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61 |
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62 |
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63 /** |
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64 Creates a copy of an object, which is to be contained by |
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65 this reference object, and leaves on error. |
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66 |
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67 @param aPtr A pointer to memory holding a copy of the object. |
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68 @param aSize The size of the memory required to hold the object. |
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69 */ |
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70 EXPORT_C void RRefBase::DoAllocL(const TAny *aPtr,TInt aSize) |
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71 { |
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72 |
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73 DoAlloc(aPtr,aSize); |
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74 User::LeaveIfNull(iPtr); |
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75 } |
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76 |
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77 |
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78 |
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79 |
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80 /** |
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81 Provides an implementation for the RRef class copy |
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82 constructor and assignment operator. |
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83 |
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84 @param aRef The reference object to be copied. |
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85 |
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86 @see RRef |
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87 */ |
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88 EXPORT_C void RRefBase::Copy(const RRefBase &aRef) |
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89 { |
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90 |
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91 if (this!=(&aRef)) |
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92 { |
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93 Free(); |
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94 iPtr=aRef.iPtr; |
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95 iPtr[-1]++; |
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96 } |
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97 } |
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98 |