1 /* |
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2 * Copyright (c) 2004 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: Progressive Download Utility |
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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 #ifndef __MMFFILEPRIV_H_ |
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20 #define __MMFFILEPRIV_H_ |
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21 |
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22 #include <f32file.h> |
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23 |
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24 #include <mmf/server/mmfclip.h> |
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25 #include <mmf/server/mmfdatabuffer.h> |
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26 |
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27 |
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28 /** |
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29 * @publishedAll |
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30 * |
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31 * Represents a copy of a KUidMmfTransferBuffer used for reading/writting to the file server |
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32 */ |
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33 |
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34 class CTransferBufferCopy : public CBase |
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35 { |
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36 public: |
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37 static CTransferBufferCopy* NewL(TInt aMaxLength); |
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38 |
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39 virtual ~CTransferBufferCopy() |
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40 {delete iBuffer;} |
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41 |
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42 |
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43 TDes8& Des() {return iBufferDes;} |
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44 |
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45 TInt MaxLength() {return iBufferDes.MaxLength();} |
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46 |
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47 void ReUse(TInt aMaxLength) {iBufferDes.Set(iBuffer,0, Min(aMaxLength, iMaxLength));} |
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48 |
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49 TBool InUse() {return iInUse;} |
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50 |
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51 void SetInUse(TBool aInUse) {iInUse=aInUse;} |
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52 |
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53 private: |
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54 CTransferBufferCopy(TInt aMaxLength) : CBase(), iMaxLength(aMaxLength), iBufferDes(0,0,0), iInUse(EFalse){} |
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55 |
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56 void ConstructL(); |
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57 |
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58 private: |
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59 TUint8* iBuffer; |
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60 |
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61 //Holds the original MaxLength when class constructed. |
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62 //May be larger than MaxLength of iBufferDes |
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63 TInt iMaxLength; |
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64 |
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65 TPtr8 iBufferDes; |
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66 |
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67 TBool iInUse; |
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68 }; |
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69 |
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70 |
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71 |
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72 |
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73 /** |
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74 * @internalComponent |
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75 * |
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76 * A request is created when an external object requests or supplies data. Calls to the File Server are |
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77 * made asynchronously and a CReadWriteRequest created to notify the caller on completion. |
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78 * |
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79 * CReadWriteRequest is an abstract class. Concrete instances are of CReadRequest & CWriteRequest. |
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80 * Concrete instances need to know whether to call MDataSink::BufferFilledL() or MDataSource::BufferEmptiedL() |
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81 */ |
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82 class CReadWriteRequest : public CActive |
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83 { |
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84 public: |
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85 CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer,MAsyncEventHandler* aEventHandler) |
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86 : CActive(EPriorityStandard), |
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87 iSinkOrSource(aSinkOrSource), |
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88 iBuffer(aBuffer), |
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89 iEventHandler(aEventHandler) |
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90 { |
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91 CActiveScheduler::Add( this ); |
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92 } |
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93 |
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94 CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, MAsyncEventHandler* aEventHandler) |
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95 : CActive(EPriorityStandard), |
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96 iSinkOrSource(aSinkOrSource), |
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97 iBuffer(aBuffer), |
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98 iTransferBufferCopy(aOptionalDataBuffer), |
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99 iEventHandler(aEventHandler) |
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100 { |
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101 CActiveScheduler::Add( this ); |
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102 iTransferBufferCopy->SetInUse(ETrue); |
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103 } |
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104 |
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105 CReadWriteRequest(CReadWriteRequest& aRequest) |
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106 : CActive(EPriorityStandard), |
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107 iSinkOrSource(aRequest.iSinkOrSource), |
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108 iBuffer(aRequest.iBuffer), |
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109 iTransferBufferCopy(aRequest.iTransferBufferCopy), |
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110 iEventHandler(aRequest.iEventHandler) |
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111 { |
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112 CActiveScheduler::Add( this ); |
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113 iTransferBufferCopy->SetInUse(ETrue); |
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114 } |
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115 |
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116 |
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117 TBool Completed() ; |
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118 TDes8& BufferDes() ; |
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119 const TDesC8& BufferDesC() ; |
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120 |
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121 ~CReadWriteRequest() ; |
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122 |
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123 |
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124 // CActive functions. |
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125 // |
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126 void SetActive() ; |
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127 void DoCancel() ; |
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128 virtual void RunL() = 0 ; |
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129 virtual TInt RunError( TInt aError ) ; |
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130 |
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131 |
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132 protected : |
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133 TAny* iSinkOrSource; |
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134 CMMFBuffer* iBuffer; |
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135 CTransferBufferCopy* iTransferBufferCopy; |
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136 |
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137 MAsyncEventHandler* iEventHandler; |
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138 TBool iCompleted ; |
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139 TDes8* iBufferDes ; |
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140 TInt iError ; |
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141 TBool iUseTransferBuffer ; |
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142 void SetTransferBuffer (TBool aTBuffer) ; |
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143 TBool CanUseTransferBuffer () ; |
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144 } ; |
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145 |
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146 /** |
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147 * @internalComponent |
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148 */ |
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149 class CReadRequest : public CReadWriteRequest |
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150 { |
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151 public : |
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152 CReadRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, TUint aPosition, TUint aFileSize, TInt aBytesDownloaded,MAsyncEventHandler* aEventHandler) |
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153 : CReadWriteRequest(aSinkOrSource, aBuffer, aEventHandler), |
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154 iPosition(aPosition), iFileSize(aFileSize),iBytesDownloaded(aBytesDownloaded) |
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155 { } |
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156 |
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157 CReadRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, TUint aPosition, TUint aFileSize,TInt aBytesDownloaded, MAsyncEventHandler* aEventHandler) |
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158 : CReadWriteRequest(aSinkOrSource, aBuffer, aOptionalDataBuffer,aEventHandler), |
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159 iPosition(aPosition), iFileSize(aFileSize),iBytesDownloaded(aBytesDownloaded) |
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160 { } |
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161 |
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162 void RunL(); |
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163 private: |
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164 TUint iPosition; |
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165 TUint iFileSize; |
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166 TInt iBytesDownloaded; |
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167 }; |
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168 |
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169 /** |
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170 * @internalComponent |
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171 */ |
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172 class CWriteRequest : public CReadWriteRequest |
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173 { |
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174 public : |
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175 CWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, MAsyncEventHandler* aEventHandler) |
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176 : CReadWriteRequest(aSinkOrSource, aBuffer, aEventHandler) |
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177 { } |
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178 |
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179 CWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, MAsyncEventHandler* aEventHandler) |
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180 : CReadWriteRequest(aSinkOrSource, aBuffer, aOptionalDataBuffer, aEventHandler) |
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181 { } |
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182 |
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183 void RunL(); |
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184 }; |
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185 |
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186 |
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187 #endif |
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188 |
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