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1 /* |
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2 * Copyright (c) 2007-2009 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 * Implements the UPS database handle manager. See class and function |
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16 * definitions for more information. |
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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 /** |
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22 @file |
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23 */ |
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24 #include <f32file.h> |
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25 #include "upscommon.h" |
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26 #include "policycache.h" |
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27 #include "upspolicycachehandle.h" |
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28 |
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29 namespace UserPromptService |
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30 { |
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31 |
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32 NONSHARABLE_CLASS(CPolicyCacheContainer) : public CBase |
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33 { |
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34 public: |
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35 static CPolicyCacheContainer *NewL(RFs &aFs); |
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36 |
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37 void IncrementReferenceCount(); |
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38 void DecrementReferenceCount(); |
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39 inline CPolicyCache *PolicyCache(); |
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40 |
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41 TInt ReferenceCount() const; |
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42 |
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43 void NotifyOnRef1(TRequestStatus &aStatus); |
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44 void CancelNotifyOnRef1(); |
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45 |
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46 private: |
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47 void ConstructL(RFs &aFs); |
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48 ~CPolicyCacheContainer(); |
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49 |
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50 TInt iReferenceCount; |
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51 CPolicyCache *iPolicyCache; |
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52 TRequestStatus *iClientRequest; |
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53 }; |
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54 |
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55 inline CPolicyCache *CPolicyCacheContainer::PolicyCache() |
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56 { |
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57 ASSERT(iPolicyCache != 0); |
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58 return iPolicyCache; |
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59 } |
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60 |
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61 inline TInt CPolicyCacheContainer::ReferenceCount() const |
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62 { |
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63 return iReferenceCount; |
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64 } |
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65 |
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66 RPolicyCacheCountedHandle::RPolicyCacheCountedHandle(RFs &aFs) |
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67 : iFs(aFs), iContainer(0) |
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68 { |
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69 } |
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70 |
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71 RPolicyCacheCountedHandle::RPolicyCacheCountedHandle(RPolicyCacheCountedHandle &aPolicyCacheManager) |
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72 : iFs(aPolicyCacheManager.iFs), iContainer(0) |
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73 { |
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74 *this = aPolicyCacheManager; |
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75 } |
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76 |
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77 RPolicyCacheCountedHandle &RPolicyCacheCountedHandle::operator=(const RPolicyCacheCountedHandle &aRhs) |
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78 { |
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79 if(this == &aRhs) return *this; |
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80 |
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81 Release(); |
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82 |
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83 if(aRhs.iContainer) |
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84 { |
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85 iContainer = aRhs.iContainer; |
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86 iContainer->IncrementReferenceCount(); |
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87 } |
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88 |
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89 return *this; |
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90 } |
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91 |
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92 RPolicyCacheCountedHandle::~RPolicyCacheCountedHandle() |
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93 /** |
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94 Destructor - make sure cache container is released. |
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95 */ |
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96 { |
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97 Release(); |
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98 } |
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99 |
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100 void RPolicyCacheCountedHandle::OpenL() |
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101 /** |
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102 Create/Open a new policy cache. If this manager is already opened then the existing cache is |
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103 released first (see Release()). |
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104 */ |
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105 { |
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106 // First release any existing container/policy cache. |
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107 Release(); |
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108 |
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109 // Now create a new one |
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110 iContainer = CPolicyCacheContainer::NewL(iFs); |
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111 } |
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112 |
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113 void RPolicyCacheCountedHandle::Release() |
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114 /** |
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115 Release the current policy cache container. If this decreases its reference count to 0, it will be |
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116 deleted. |
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117 */ |
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118 { |
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119 if(iContainer) |
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120 { |
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121 iContainer->DecrementReferenceCount(); |
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122 iContainer = 0; |
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123 } |
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124 } |
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125 |
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126 TBool RPolicyCacheCountedHandle::IsOpen() const |
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127 { |
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128 return iContainer != 0; |
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129 } |
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130 |
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131 CPolicyCache *RPolicyCacheCountedHandle::operator->() |
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132 /** |
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133 Returns the CPolicyCache ptr so -> can be used to call policy cache functions. |
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134 |
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135 If the class is not already open, then we will attempt to open ourself using OpenL(). |
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136 |
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137 Note that this operator can leave... |
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138 */ |
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139 { |
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140 if(iContainer == 0) |
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141 { |
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142 OpenL(); |
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143 ASSERT(iContainer); |
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144 } |
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145 return iContainer->PolicyCache(); |
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146 } |
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147 |
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148 void RPolicyCacheCountedHandle::NotifyOnRef1(TRequestStatus &aStatus) |
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149 /** |
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150 Register for notifcation when the underlying CPolicyCacheContainer reference |
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151 count reaches 1, presumably when the client holds the only reference. |
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152 |
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153 Only one client is allowed to register against a single CPolicyCacheContainer. |
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154 */ |
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155 { |
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156 if((iContainer == 0) || (iContainer->ReferenceCount() <= 1)) |
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157 { |
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158 // No container or ref count is 1, so complete now. |
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159 TRequestStatus *rs = &aStatus; |
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160 *rs = KRequestPending; |
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161 User::RequestComplete(rs, KErrNone); |
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162 return; |
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163 } |
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164 iContainer->NotifyOnRef1(aStatus); |
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165 } |
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166 |
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167 void RPolicyCacheCountedHandle::CancelNotifyOnRef1() |
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168 /** |
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169 Cancel the call to NotifyOnRef1. The request will be completed immediately. |
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170 */ |
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171 { |
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172 if(!iContainer) |
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173 { |
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174 return; |
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175 } |
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176 iContainer->CancelNotifyOnRef1(); |
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177 } |
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178 |
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179 CPolicyCacheContainer *CPolicyCacheContainer::NewL(RFs &aFs) |
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180 /** |
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181 Create a CPolicyCacheContainer containing a CPolicyCache with a reference count of 1. |
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182 */ |
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183 { |
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184 CPolicyCacheContainer *self = new(ELeave) CPolicyCacheContainer(); |
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185 CleanupStack::PushL(self); |
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186 self->ConstructL(aFs); |
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187 CleanupStack::Pop(self); |
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188 return self; |
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189 } |
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190 |
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191 void CPolicyCacheContainer::IncrementReferenceCount() |
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192 /** |
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193 Increment the reference count. |
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194 */ |
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195 { |
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196 ASSERT(iReferenceCount > 0); |
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197 ++iReferenceCount; |
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198 } |
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199 |
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200 void CPolicyCacheContainer::DecrementReferenceCount() |
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201 /** |
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202 Decrement the reference count and delete self if it reaches 0. |
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203 */ |
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204 { |
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205 --iReferenceCount; |
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206 if(iReferenceCount <= 1) |
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207 { |
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208 if(iClientRequest && iClientRequest->Int() == KRequestPending) |
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209 { |
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210 User::RequestComplete(iClientRequest, KErrNone); |
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211 } |
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212 } |
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213 |
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214 if(iReferenceCount <= 0) |
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215 { |
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216 delete this; |
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217 } |
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218 } |
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219 |
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220 void CPolicyCacheContainer::NotifyOnRef1(TRequestStatus &aStatus) |
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221 /** |
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222 Register for notifcation when the reference count reduces to 1, presumably |
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223 when the client holds the only reference. |
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224 |
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225 Only one client is allowed to register against a single CPolicyCacheContainer. |
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226 */ |
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227 { |
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228 BULLSEYE_OFF |
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229 if(iClientRequest != 0) |
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230 { |
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231 TRequestStatus *rs = &aStatus; |
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232 *rs = KRequestPending; |
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233 User::RequestComplete(rs, KErrServerBusy); |
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234 return; |
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235 } |
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236 BULLSEYE_RESTORE |
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237 |
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238 // Initialise client request |
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239 iClientRequest = &aStatus; |
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240 *iClientRequest = KRequestPending; |
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241 |
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242 // Are we already at ref 1? |
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243 if(iReferenceCount <= 1) |
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244 { |
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245 User::RequestComplete(iClientRequest, KErrNone); |
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246 } |
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247 } |
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248 |
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249 void CPolicyCacheContainer::CancelNotifyOnRef1() |
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250 /** |
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251 Cancel the previous call to NotifyOnRef1. |
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252 */ |
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253 { |
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254 if((iClientRequest != 0) && (iClientRequest->Int() == KRequestPending)) |
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255 { |
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256 User::RequestComplete(iClientRequest, KErrCancel); |
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257 return; |
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258 } |
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259 } |
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260 |
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261 void CPolicyCacheContainer::ConstructL(RFs &aFs) |
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262 { |
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263 _LIT(KPolicyDir,"\\private\\10283558\\policies\\"); |
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264 iPolicyCache = CPolicyCache::NewL(aFs, KPolicyDir()); |
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265 iReferenceCount = 1; |
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266 } |
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267 |
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268 CPolicyCacheContainer::~CPolicyCacheContainer() |
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269 { |
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270 delete iPolicyCache; |
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271 iPolicyCache = 0; |
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272 |
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273 if(iClientRequest && iClientRequest->Int() == KRequestPending) |
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274 { |
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275 User::RequestComplete(iClientRequest, KErrNone); |
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276 iClientRequest = 0; |
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277 } |
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278 } |
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279 |
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280 } // End of UserPromptService namespace |
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281 |
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282 // End of file |
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283 |