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1 /* |
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2 * Copyright (c) 2005 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: |
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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 "natfwstunclientobserver.h" |
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22 #include "casynccallback.h" |
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23 #include "stunassert.h" |
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24 |
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25 // ----------------------------------------------------------------------------- |
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26 // CAsyncCallback::NewL |
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27 // ----------------------------------------------------------------------------- |
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28 // |
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29 CAsyncCallback* CAsyncCallback::NewL( MSTUNClientObserver& aObserver ) |
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30 { |
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31 CAsyncCallback* self = new (ELeave) CAsyncCallback( aObserver ); |
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32 CActiveScheduler::Add( self ); |
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33 self->WaitForRequests(); |
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34 return self; |
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35 } |
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36 |
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37 // ----------------------------------------------------------------------------- |
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38 // CAsyncCallback::CAsyncCallback |
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39 // ----------------------------------------------------------------------------- |
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40 // |
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41 CAsyncCallback::CAsyncCallback( MSTUNClientObserver& aObserver ) : |
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42 CActive( EPriorityStandard ), |
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43 iObserver( aObserver ), |
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44 iPendingCallbacks( _FOFF( TSTUNCallbackInfo, iLink ) ) |
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45 { |
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46 } |
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47 |
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48 // --------------------------------------------------------------------------- |
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49 // CAsyncCallback::CAsyncCallback |
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50 // Dummy implementation. Default constructor is declared private and not used. |
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51 // --------------------------------------------------------------------------- |
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52 // |
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53 CAsyncCallback::CAsyncCallback() : |
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54 CActive( EPriorityStandard ), |
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55 iObserver( *( MSTUNClientObserver* )0x1 ) |
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56 { |
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57 } |
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58 |
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59 // --------------------------------------------------------------------------- |
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60 // CAsyncCallback::CAsyncCallback |
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61 // Dummy implementation, as copy constructor is declared private and not used. |
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62 // --------------------------------------------------------------------------- |
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63 // |
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64 CAsyncCallback::CAsyncCallback( const CAsyncCallback& aAsyncCallback ) : |
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65 CActive( EPriorityStandard ), |
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66 iObserver( aAsyncCallback.iObserver ) |
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67 { |
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68 } |
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69 |
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70 // ----------------------------------------------------------------------------- |
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71 // CAsyncCallback::~CAsyncCallback |
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72 // ----------------------------------------------------------------------------- |
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73 // |
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74 CAsyncCallback::~CAsyncCallback() |
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75 { |
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76 Cancel(); |
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77 |
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78 TSTUNCallbackInfo* callback = iPendingCallbacks.First(); |
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79 while ( iPendingCallbacks.IsFirst( callback ) && |
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80 !iPendingCallbacks.IsEmpty() ) |
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81 { |
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82 iPendingCallbacks.Remove( *callback ); |
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83 delete callback; |
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84 callback = iPendingCallbacks.First(); |
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85 } |
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86 } |
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87 |
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88 // ----------------------------------------------------------------------------- |
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89 // CAsyncCallback::DoCancel |
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90 // ----------------------------------------------------------------------------- |
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91 // |
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92 void CAsyncCallback::DoCancel() |
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93 { |
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94 if ( iStatus == KRequestPending ) |
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95 { |
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96 TRequestStatus* status = &iStatus; |
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97 User::RequestComplete( status, KErrCancel ); |
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98 } |
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99 } |
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100 |
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101 // ----------------------------------------------------------------------------- |
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102 // CAsyncCallback::RunL |
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103 // ----------------------------------------------------------------------------- |
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104 // |
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105 void CAsyncCallback::RunL() |
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106 { |
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107 WaitForRequests(); |
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108 ExecuteFirstCallback(); |
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109 } |
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110 |
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111 // ----------------------------------------------------------------------------- |
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112 // CAsyncCallback::RunError |
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113 // Currently RunL cannot leave. |
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114 // ----------------------------------------------------------------------------- |
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115 // |
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116 TInt CAsyncCallback::RunError( TInt aError ) |
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117 { |
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118 if ( aError == KErrNoMemory ) |
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119 { |
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120 return aError; |
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121 } |
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122 return KErrNone; |
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123 } |
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124 |
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125 // ----------------------------------------------------------------------------- |
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126 // CAsyncCallback::MakeCallbackL |
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127 // ----------------------------------------------------------------------------- |
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128 // |
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129 void CAsyncCallback::MakeCallbackL( TSTUNCallbackInfo::TFunction aFunction, |
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130 const CBinding* aBinding, |
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131 TInt aErrorCode, |
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132 const CSTUNClient* aClient ) |
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133 { |
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134 TSTUNCallbackInfo* callback = new ( ELeave ) TSTUNCallbackInfo( aFunction, |
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135 aBinding, |
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136 aErrorCode, |
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137 aClient ); |
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138 CleanupStack::PushL( callback ); |
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139 __STUN_ASSERT_L( callback->Validate(), KErrArgument ); |
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140 CleanupStack::Pop( callback ); |
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141 |
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142 //CActive::iActive won't tell whether User::RequestComplete has already |
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143 //been called, so iStatus is inspected to see whether a previous call to |
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144 //AddDeleteRequestL has already called User::RequestComplete. |
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145 if ( iStatus == KRequestPending ) |
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146 { |
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147 Wakeup(); |
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148 } |
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149 |
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150 iPendingCallbacks.AddLast( *callback ); |
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151 } |
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152 |
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153 // ----------------------------------------------------------------------------- |
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154 // CAsyncCallback::CancelCallback |
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155 // ----------------------------------------------------------------------------- |
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156 // |
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157 void CAsyncCallback::CancelCallback( const CBinding& aBinding ) |
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158 { |
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159 TSglQueIter<TSTUNCallbackInfo> iter( iPendingCallbacks ); |
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160 |
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161 for ( TSTUNCallbackInfo* callback = iter++; callback; callback = iter++ ) |
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162 { |
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163 if ( callback->iBinding == &aBinding ) |
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164 { |
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165 iPendingCallbacks.Remove( *callback ); |
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166 delete callback; |
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167 } |
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168 } |
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169 } |
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170 |
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171 // ----------------------------------------------------------------------------- |
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172 // CAsyncCallback::ExecuteFirstCallback |
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173 // Handle one callback request and wait for the next one. If there are more |
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174 // callbacks, complete the asynchronous request so that RunL will soon be called |
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175 // again. Don't call more than one callback, since upper layer might've deleted |
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176 // STUN client, causing CAsyncCallback to be deleted too. For the same reason |
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177 // nothing is done after executing the callback. |
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178 // ----------------------------------------------------------------------------- |
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179 // |
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180 void CAsyncCallback::ExecuteFirstCallback() |
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181 { |
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182 TSTUNCallbackInfo* callback = iPendingCallbacks.First(); |
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183 if ( iPendingCallbacks.IsFirst( callback ) && |
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184 !iPendingCallbacks.IsEmpty() ) |
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185 { |
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186 iPendingCallbacks.Remove( *callback ); |
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187 |
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188 if ( !iPendingCallbacks.IsEmpty() ) |
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189 { |
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190 Wakeup(); |
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191 } |
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192 |
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193 callback->Execute( iObserver ); |
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194 delete callback; |
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195 } |
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196 } |
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197 |
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198 // ----------------------------------------------------------------------------- |
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199 // CAsyncCallback::WaitForRequests |
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200 // ----------------------------------------------------------------------------- |
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201 // |
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202 void CAsyncCallback::WaitForRequests() |
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203 { |
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204 __STUN_ASSERT_RETURN( !IsActive(), KErrNotReady ); |
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205 |
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206 iStatus = KRequestPending; |
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207 SetActive(); |
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208 } |
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209 |
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210 // ----------------------------------------------------------------------------- |
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211 // CAsyncCallback::Wakeup |
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212 // ----------------------------------------------------------------------------- |
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213 // |
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214 void CAsyncCallback::Wakeup() |
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215 { |
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216 TRequestStatus* status = &iStatus; |
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217 User::RequestComplete( status, KErrNone ); |
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218 } |