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1 /* |
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2 * Copyright (c) 2004-2009 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 the License "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: |
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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 #include "cafpanic.h" |
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21 #include "contentIterator.h" |
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22 #include "FileContentIterator.h" |
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23 #include "contentiteratordata.h" |
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24 |
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25 using ContentAccess::CContentIterator; |
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26 using ContentAccess::TVirtualPathPtr; |
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27 |
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28 _LIT(KIteratorThread,"ContentIterator"); |
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29 EXPORT_C CContentIterator* CContentIterator::NewL(const TDesC& aPath, TBool aRecursive, const TDesC8& aMimeType) |
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30 { |
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31 CContentIterator* self = new (ELeave) CContentIterator(); |
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32 CleanupStack::PushL(self); |
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33 self->ConstructL(aPath, aRecursive, aMimeType); |
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34 CleanupStack::Pop(); |
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35 return self; |
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36 } |
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37 |
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38 CContentIterator::CContentIterator() : CActive(EPriorityStandard) |
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39 { |
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40 } |
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41 |
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42 CContentIterator::~CContentIterator() |
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43 { |
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44 // tell thread to cancel and shutdown |
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45 Cancel(); |
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46 |
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47 // close thread handle |
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48 iWorkerThread.Close(); |
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49 delete info; |
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50 } |
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51 |
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52 void CContentIterator::ConstructL(const TDesC& aPath, TBool aRecursive, const TDesC8& aMimeType) |
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53 { |
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54 // This data buffer will be shared between the client and the worker thread |
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55 info = CContentIteratorData::NewL(aPath,aRecursive,aMimeType); |
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56 |
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57 // create the thread, need a big heap and stack for recursively searching through directories |
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58 User::LeaveIfError(iWorkerThread.Create(KIteratorThread(),CContentIterator::ThreadEntry,32768, KMinHeapSize, 131072, (void *) info , EOwnerProcess)); |
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59 |
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60 // add ourselves to active scheduler |
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61 CActiveScheduler::Add(this); |
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62 |
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63 // Set up notification in case the thread panics etc |
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64 iStatus = KRequestPending; |
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65 iWorkerThread.Logon(iStatus); |
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66 SetActive(); |
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67 |
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68 // start the thread |
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69 iWorkerThread.Resume(); |
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70 } |
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71 |
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72 |
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73 void CContentIterator::DoCancel() |
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74 { |
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75 // Wait until thread finishes whatever it's doing |
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76 info->Lock(); |
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77 |
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78 // Signal for the thread to close |
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79 info->RunThreadFunction(EIteratorShutdownThread); |
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80 } |
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81 |
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82 void CContentIterator::RunL() |
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83 { |
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84 // Thread must have completed |
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85 if(iWorkerThread.ExitType() == EExitPanic) |
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86 { |
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87 // Thread panicd, better panic our thread |
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88 User::Panic(KCafPanicString, ECafPanicContentIteratorThreadPanic); |
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89 } |
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90 } |
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91 |
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92 EXPORT_C TVirtualPathPtr CContentIterator::VirtualPath() |
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93 { |
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94 // Wait until thread finishes whatever it's doing |
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95 info->Lock(); |
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96 iFileName.Copy(info->Path()); |
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97 iUniqueId.Copy(info->UniqueId()); |
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98 info->Unlock(); |
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99 return TVirtualPathPtr(iFileName, iUniqueId); |
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100 } |
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101 |
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102 EXPORT_C const TDesC& CContentIterator::Name() |
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103 { |
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104 // Wait until thread finishes whatever it's doing |
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105 info->Lock(); |
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106 iName.Copy(info->Name()); |
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107 info->Unlock(); |
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108 return iName; |
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109 } |
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110 |
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111 EXPORT_C const TDesC8& CContentIterator::MimeType() |
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112 { |
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113 // Wait until thread finishes whatever it's doing |
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114 info->Lock(); |
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115 iMimeType.Copy(info->MimeType()); |
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116 info->Unlock(); |
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117 return iMimeType; |
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118 } |
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119 |
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120 EXPORT_C void CContentIterator::Next(TRequestStatus &aStatus) |
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121 { |
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122 // Wait until thread finishes whatever it's doing |
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123 info->Lock(); |
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124 |
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125 // Remember which thread and TRequestStatus to notify |
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126 TThreadId id = RThread().Id(); |
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127 info->SetClientRequest(id, aStatus); |
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128 |
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129 // Tell it to find the next iteration |
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130 info->RunThreadFunction(EIteratorFindNextContentObject); |
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131 } |
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132 |
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133 |
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134 TInt CContentIterator::ThreadEntry(TAny* aAny) |
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135 { |
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136 TBool exitNow = EFalse; |
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137 TInt err; |
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138 CFileContentIterator* iterator = NULL; |
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139 RThread clientThread; |
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140 CContentIteratorData* info = reinterpret_cast <CContentIteratorData *> (aAny); |
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141 |
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142 // create a trap handler |
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143 CTrapCleanup* cleanup = CTrapCleanup::New(); |
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144 |
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145 while(!exitNow) |
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146 { |
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147 // Thread will wait here until signaled by other CContentIterator functions |
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148 switch(info->ThreadWait()) |
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149 { |
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150 // Client thread has asked us to shutdown, exit loop |
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151 case EIteratorShutdownThread: |
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152 exitNow = ETrue; |
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153 break; |
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154 // Client thread is asking us to find the next object |
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155 case EIteratorFindNextContentObject: |
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156 if(!iterator) |
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157 { |
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158 TRAP(err, iterator = CFileContentIterator::NewL(info->Path(), info->IsRecursive(), info->MimeType())); |
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159 info->SetData(KNullDesC(), KNullDesC(), KNullDesC(), KNullDesC8()); |
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160 } |
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161 else |
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162 { |
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163 err = iterator->Next(); |
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164 } |
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165 |
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166 if(err == KErrNone) |
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167 { |
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168 // If a content object was found, write the value back |
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169 // into the other thread while the info is still locked |
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170 info->SetData(iterator->FileName(),iterator->UniqueId(), iterator->Name(), iterator->MimeType()); |
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171 } |
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172 |
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173 // Complete the clients asynchronous request |
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174 info->CompleteClientRequest(err); |
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175 break; |
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176 default: |
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177 User::Panic(KCafPanicString, ECafPanicContentIteratorUnknownRequest); |
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178 break; |
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179 }; |
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180 |
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181 // Allow the client to post a new request |
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182 info->Unlock(); |
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183 } |
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184 delete iterator; |
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185 delete cleanup; |
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186 return KErrNone; |
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187 } |
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188 |