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1 /* |
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2 * Copyright (c) 2007 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 "mnatfwpluginobserver.h" |
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22 #include "cturnasynccallback.h" |
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23 |
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24 |
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25 // --------------------------------------------------------------------------- |
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26 // CTurnAsyncCallback::NewL |
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27 // --------------------------------------------------------------------------- |
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28 // |
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29 CTurnAsyncCallback* CTurnAsyncCallback::NewL( |
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30 const CNATFWPluginApi& aTurnPlugin, |
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31 MNATFWPluginObserver& aObserver ) |
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32 { |
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33 CTurnAsyncCallback* self |
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34 = new (ELeave) CTurnAsyncCallback( aTurnPlugin, aObserver ); |
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35 CActiveScheduler::Add( self ); |
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36 self->WaitForRequestsL(); |
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37 return self; |
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38 } |
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39 |
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40 // --------------------------------------------------------------------------- |
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41 // CTurnAsyncCallback::CTurnAsyncCallback |
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42 // --------------------------------------------------------------------------- |
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43 // |
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44 CTurnAsyncCallback::CTurnAsyncCallback( |
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45 const CNATFWPluginApi& aTurnPlugin, |
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46 MNATFWPluginObserver& aObserver ) |
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47 : |
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48 CActive( EPriorityStandard ), |
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49 iTurnPlugin( aTurnPlugin ), |
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50 iObserver( aObserver ), |
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51 iPendingCallbacks( _FOFF( TTurnPluginCallbackInfo, iLink ) ) |
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52 { |
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53 } |
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54 |
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55 // --------------------------------------------------------------------------- |
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56 // CTurnAsyncCallback::CTurnAsyncCallback |
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57 // Dummy implementation. Default constructor is declared private and not used. |
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58 // --------------------------------------------------------------------------- |
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59 // |
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60 CTurnAsyncCallback::CTurnAsyncCallback() : |
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61 CActive( EPriorityStandard ), |
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62 iTurnPlugin( *( CNATFWPluginApi* )0x1 ), |
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63 iObserver( *( MNATFWPluginObserver* )0x1 ) |
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64 { |
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65 } |
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66 |
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67 // --------------------------------------------------------------------------- |
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68 // CTurnAsyncCallback::CTurnAsyncCallback |
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69 // Dummy implementation, as copy constructor is declared private and not used. |
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70 // --------------------------------------------------------------------------- |
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71 // |
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72 CTurnAsyncCallback::CTurnAsyncCallback( |
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73 const CTurnAsyncCallback& aAsyncCallback ) : |
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74 CActive( EPriorityStandard ), |
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75 iTurnPlugin( *( CNATFWPluginApi* )0x1 ), |
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76 iObserver( aAsyncCallback.iObserver ) |
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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 // CTurnAsyncCallback::~CTurnAsyncCallback |
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82 // --------------------------------------------------------------------------- |
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83 // |
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84 CTurnAsyncCallback::~CTurnAsyncCallback() |
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85 { |
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86 Cancel(); |
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87 |
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88 TTurnPluginCallbackInfo* callback = iPendingCallbacks.First(); |
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89 while ( iPendingCallbacks.IsFirst( callback ) && |
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90 !iPendingCallbacks.IsEmpty() ) |
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91 { |
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92 iPendingCallbacks.Remove( *callback ); |
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93 delete callback; |
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94 callback = iPendingCallbacks.First(); |
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95 } |
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96 } |
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97 |
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98 // --------------------------------------------------------------------------- |
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99 // CTurnAsyncCallback::DoCancel |
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100 // --------------------------------------------------------------------------- |
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101 // |
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102 void CTurnAsyncCallback::DoCancel() |
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103 { |
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104 if ( iStatus == KRequestPending ) |
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105 { |
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106 TRequestStatus* status = &iStatus; |
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107 User::RequestComplete( status, KErrCancel ); |
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108 } |
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109 } |
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110 |
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111 // --------------------------------------------------------------------------- |
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112 // CTurnAsyncCallback::RunL |
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113 // --------------------------------------------------------------------------- |
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114 // |
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115 void CTurnAsyncCallback::RunL() |
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116 { |
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117 WaitForRequestsL(); |
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118 ExecuteFirstCallback(); |
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119 } |
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120 |
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121 // --------------------------------------------------------------------------- |
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122 // CTurnAsyncCallback::RunError |
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123 // Currently RunL cannot leave. |
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124 // --------------------------------------------------------------------------- |
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125 // |
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126 TInt CTurnAsyncCallback::RunError( TInt aError ) |
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127 { |
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128 if ( aError == KErrNoMemory ) |
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129 { |
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130 return aError; |
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131 } |
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132 return KErrNone; |
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133 } |
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134 |
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135 // --------------------------------------------------------------------------- |
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136 // CTurnAsyncCallback::MakeCallbackL |
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137 // --------------------------------------------------------------------------- |
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138 // |
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139 void CTurnAsyncCallback::MakeCallbackL( |
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140 TTurnPluginCallbackInfo::TFunction aFunction, |
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141 TUint aStreamId, |
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142 TInt aErrorCode, |
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143 TAny* aEventData ) |
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144 { |
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145 TTurnPluginCallbackInfo* callback = |
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146 new ( ELeave ) TTurnPluginCallbackInfo( iTurnPlugin, |
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147 iObserver, |
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148 aFunction, |
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149 aStreamId, |
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150 aErrorCode, |
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151 aEventData ); |
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152 CleanupStack::PushL( callback ); |
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153 __ASSERT_ALWAYS( callback->Validate(), User::Leave( KErrArgument ) ); |
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154 CleanupStack::Pop( callback ); |
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155 |
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156 // CActive::iActive won't tell whether User::RequestComplete has already |
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157 // been called, so iStatus is inspected to see whether a previous call |
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158 // to AddDeleteRequestL has already called User::RequestComplete. |
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159 |
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160 if ( iStatus == KRequestPending ) |
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161 { |
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162 Wakeup(); |
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163 } |
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164 |
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165 iPendingCallbacks.AddLast( *callback ); |
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166 } |
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167 |
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168 // --------------------------------------------------------------------------- |
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169 // CTurnAsyncCallback::CancelCallback |
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170 // --------------------------------------------------------------------------- |
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171 // |
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172 void CTurnAsyncCallback::CancelCallback( TUint aStreamId ) |
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173 { |
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174 TSglQueIter<TTurnPluginCallbackInfo> iter( iPendingCallbacks ); |
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175 |
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176 for ( TTurnPluginCallbackInfo* callback = iter++; |
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177 callback; callback = iter++ ) |
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178 { |
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179 if ( callback->iStreamId == aStreamId ) |
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180 { |
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181 iPendingCallbacks.Remove( *callback ); |
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182 delete callback; |
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183 } |
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184 } |
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185 } |
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186 |
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187 // --------------------------------------------------------------------------- |
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188 // CTurnAsyncCallback::ExecuteFirstCallback |
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189 // Handle one callback request and wait for the next one. If there are more |
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190 // callbacks, complete the asynchronous request so that RunL will soon be |
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191 // called again. Don't call more than one callback, since upper layer |
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192 // might've deleted STUN plugin, causing CTurnAsyncCallback to be deleted too. |
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193 // For the same reason nothing is done after executing the callback. |
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194 // --------------------------------------------------------------------------- |
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195 // |
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196 void CTurnAsyncCallback::ExecuteFirstCallback() |
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197 { |
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198 TTurnPluginCallbackInfo* callback = iPendingCallbacks.First(); |
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199 if ( iPendingCallbacks.IsFirst( callback ) && |
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200 !iPendingCallbacks.IsEmpty() ) |
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201 { |
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202 iPendingCallbacks.Remove( *callback ); |
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203 |
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204 if ( !iPendingCallbacks.IsEmpty() ) |
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205 { |
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206 Wakeup(); |
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207 } |
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208 |
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209 callback->Execute(); |
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210 delete callback; |
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211 } |
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212 } |
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213 |
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214 // --------------------------------------------------------------------------- |
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215 // CTurnAsyncCallback::WaitForRequestsL |
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216 // --------------------------------------------------------------------------- |
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217 // |
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218 void CTurnAsyncCallback::WaitForRequestsL() |
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219 { |
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220 __ASSERT_ALWAYS( !IsActive(), User::Leave( KErrNotReady ) ); |
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221 |
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222 iStatus = KRequestPending; |
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223 SetActive(); |
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224 } |
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225 |
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226 // --------------------------------------------------------------------------- |
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227 // CTurnAsyncCallback::Wakeup |
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228 // --------------------------------------------------------------------------- |
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229 // |
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230 void CTurnAsyncCallback::Wakeup() |
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231 { |
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232 TRequestStatus* status = &iStatus; |
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233 User::RequestComplete( status, KErrNone ); |
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234 } |
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235 |
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236 // End of file |