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: Messenger Request Manager. |
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15 * The stub version of this file can be found from file |
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16 * CPhSrvMessengerRequestManagerStub.cpp |
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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 // INCLUDES |
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23 #include "cphsrvmessengerrequestmanager.h" |
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24 #include "cphsrvmessengerobject.h" |
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25 #include "cphsrvsubsessionbase.h" |
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26 #include "phsrvutils.h" |
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27 #include "phsrvmessengertypes.h" |
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28 #include "phsrvdebuginfo.h" |
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29 |
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30 |
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31 // CONSTANTS |
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32 |
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33 // The default size of the Messenger object storage. |
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34 const TInt KPhSrvMessengerObjectGranularity = 4; |
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35 |
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36 // The size of the Sent message's storage. |
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37 const TInt KPhSrvMessengerPendingSendRequestGranularity |
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38 = KPhSrvMessengerObjectGranularity; |
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39 |
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40 |
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41 |
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42 |
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43 // ============================ MEMBER FUNCTIONS =============================== |
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44 |
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45 // ----------------------------------------------------------------------------- |
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46 // CPhSrvMessengerRequestManager::CPhSrvMessengerRequestManager |
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47 // |
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48 // Constructor. |
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49 // ----------------------------------------------------------------------------- |
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50 // |
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51 CPhSrvMessengerRequestManager::CPhSrvMessengerRequestManager( |
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52 CPhSrvServer& aServer ) |
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53 : iServer( aServer ), |
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54 iSentDataIdGenerator( 1 ), // Is never 0. |
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55 iSendProcessOngoing( EFalse ) |
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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 // ----------------------------------------------------------------------------- |
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61 // CPhSrvMessengerRequestManager::~CPhSrvMessengerRequestManager |
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62 // |
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63 // Destructor. |
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64 // ----------------------------------------------------------------------------- |
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65 // |
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66 CPhSrvMessengerRequestManager::~CPhSrvMessengerRequestManager() |
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67 { |
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68 delete iDefaultSizeBuffer; |
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69 |
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70 RMessengerArray* array = SendChain(); |
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71 if ( array ) |
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72 { |
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73 // Objects not deleted, because they are not owned. |
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74 array->Reset(); |
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75 array->Close(); |
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76 delete array; |
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77 } |
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78 |
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79 array = MessengerArray(); |
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80 if ( array ) |
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81 { |
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82 array->ResetAndDestroy(); |
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83 array->Close(); |
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84 |
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85 delete array; |
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86 } |
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87 } |
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88 |
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89 |
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90 // ----------------------------------------------------------------------------- |
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91 // CPhSrvMessengerRequestManager::ConstructL |
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92 // |
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93 // Complete construction. |
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94 // ----------------------------------------------------------------------------- |
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95 // |
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96 void CPhSrvMessengerRequestManager::ConstructL() |
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97 { |
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98 iDefaultSizeBuffer = HBufC8::NewMaxL( KPhCltDefMesSize ); |
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99 |
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100 // Space for messenger objects (clients) |
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101 iMessengerObjects = new ( ELeave ) RPointerArray< |
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102 CPhSrvMessengerObject >( KPhSrvMessengerObjectGranularity ); |
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103 |
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104 // Space for the Send queue. |
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105 iSendChain = new ( ELeave ) RPointerArray< CPhSrvMessengerObject >( |
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106 KPhSrvMessengerPendingSendRequestGranularity ); |
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107 } |
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108 |
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109 |
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110 // ----------------------------------------------------------------------------- |
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111 // CPhSrvMessengerRequestManager::NegotiatorRequest |
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112 // |
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113 // Initiate a messenger request - called by the external messenger interface. |
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114 // ----------------------------------------------------------------------------- |
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115 // |
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116 void CPhSrvMessengerRequestManager::NegotiatorRequest( |
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117 CPhSrvSubSessionBase& aSubSession, |
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118 const TPhCltMessengerParameters& aParameters, |
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119 const RMessage2& aMessage ) |
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120 { |
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121 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequest START" ); // debug print |
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122 |
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123 // Panic if this is not the only request from this subsession. |
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124 if ( RequestAlreadyExists( |
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125 aSubSession, |
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126 aParameters, |
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127 aMessage ) ) |
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128 { |
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129 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequest PANIC" ); // debug print |
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130 |
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131 // First delete all data related to this object. |
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132 NegotiatorRequestDelete( aSubSession ); |
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133 |
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134 PhoneServerUtils::PanicClient( |
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135 EPhoneServerPanicTooManyRequestsOngoing, |
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136 aMessage ); |
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137 } |
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138 else |
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139 { |
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140 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequest HANDLE" ); // debug print |
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141 |
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142 // Request was set successfully, so handle it. |
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143 TPhCltMessengerCommand command = aParameters.iMessengerCommand; |
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144 |
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145 // Update the messenger chain. |
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146 UpdateMessengerChain( iRequestObject, command ); |
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147 |
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148 // Clear the request object. |
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149 iRequestObject = NULL; |
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150 |
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151 // Complete Skip request. |
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152 if ( command == EPhCltMesCommandSkip ) |
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153 { |
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154 aMessage.Complete( KErrNone ); |
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155 } |
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156 } |
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157 |
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158 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequest END" ); // debug print |
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159 } |
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160 |
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161 |
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162 // ----------------------------------------------------------------------------- |
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163 // CPhSrvMessengerRequestManager::NegotiatorRequestCancel |
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164 // |
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165 // Cancel a messenger request handling. |
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166 // ----------------------------------------------------------------------------- |
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167 // |
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168 void CPhSrvMessengerRequestManager::NegotiatorRequestCancel( |
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169 CPhSrvSubSessionBase& aSubSession, |
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170 const TPhCltMessengerCommand aRequestType ) |
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171 { |
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172 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestCancel START" ); // debug print |
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173 |
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174 RMessengerArray* messengerObjects = MessengerArray(); |
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175 |
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176 if ( aRequestType == EPhCltMesCommandSend || |
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177 aRequestType == EPhCltMesCommandReceive ) |
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178 { |
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179 // Obtain the subsession's handle |
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180 const TInt handle = aSubSession.SubSessionUniqueHandle(); |
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181 |
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182 // Now look for any object that match. |
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183 const TInt count = messengerObjects->Count(); |
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184 for( TInt i = 0; i < count; i++ ) |
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185 { |
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186 CPhSrvMessengerObject* entry = ( *messengerObjects )[i]; |
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187 if ( entry->SubSessionHandle() == handle ) |
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188 { |
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189 // Found matching entry, so cancel it's request. |
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190 entry->InformOfMessengerRequest( KErrCancel, aRequestType ); |
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191 |
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192 |
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193 TPhCltMessengerCommand request = aRequestType; |
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194 if ( aRequestType == EPhCltMesCommandSend ) |
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195 { |
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196 // Send request is canceled. |
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197 request = EPhCltMesCommandCancelSend; |
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198 } |
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199 else |
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200 { |
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201 // Receive request is canceled. |
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202 request = EPhCltMesCommandCancelReceive; |
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203 } |
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204 |
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205 // Update the messenger chain. |
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206 UpdateMessengerChain( entry, request ); |
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207 } |
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208 } |
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209 } |
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210 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestCancel STOP" ); // debug print |
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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 // CPhSrvMessengerRequestManager::NegotiatorRequestConstructL |
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216 // |
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217 // Reserve all space needed for the subsession given as parameter. |
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218 // ----------------------------------------------------------------------------- |
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219 // |
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220 void CPhSrvMessengerRequestManager::NegotiatorRequestConstructL( |
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221 CPhSrvSubSessionBase& aSubSession, |
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222 const TPhCltMessengerParameters& aParameters, |
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223 const RMessage2& aMessage ) |
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224 { |
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225 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestConstructL START" ); // debug print |
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226 |
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227 // Create pending request |
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228 CPhSrvMessengerObject* object = CPhSrvMessengerObject::NewLC( |
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229 aSubSession, |
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230 aParameters ); |
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231 |
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232 RMessengerArray* sendArray = SendChain(); |
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233 RMessengerArray* messengerObjects = MessengerArray(); |
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234 |
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235 ///////////////////////////////////////////////////////////////// |
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236 // First try that there is enough space in send array. |
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237 ///////////////////////////////////////////////////////////////// |
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238 const CPhSrvMessengerObject* entry = NULL; |
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239 TInt err = KErrNone; |
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240 // The number of existing messenger objects + the new one. |
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241 const TInt count = ( messengerObjects->Count() + 1 ); |
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242 |
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243 TInt i = 0; |
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244 for ( i = 0; ( i < count ) && ( err == KErrNone ); i++ ) |
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245 { |
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246 // If Append failed, there is not enough memory and err != KErrNone. |
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247 err = sendArray->Append( entry ); |
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248 } |
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249 |
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250 // Remove now the added objects -> Buffer remains reserved for them. |
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251 const TInt sendChainCount = ( sendArray->Count() - 1 ); |
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252 for( i = sendChainCount; i >= 0; i-- ) |
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253 { |
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254 if( ( * sendArray )[i] == NULL ) |
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255 { |
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256 // This object was added, so remove it. |
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257 sendArray->Remove( i ); |
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258 } |
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259 } |
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260 |
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261 // Leave if addition to send chain were not successful. |
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262 User::LeaveIfError( err ); |
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263 |
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264 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestConstructL MIDDLE" ); // debug print |
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265 |
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266 ///////////////////////////////////////////////////////////////// |
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267 // There was enough space in send array, so next try to append the |
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268 // object to the object array. |
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269 ///////////////////////////////////////////////////////////////// |
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270 User::LeaveIfError( |
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271 messengerObjects->Append( object ) ); |
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272 CleanupStack::Pop( object ); |
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273 |
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274 aMessage.Complete( KErrNone ); |
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275 |
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276 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestConstructL STOP" ); // debug print |
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277 } |
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278 |
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279 |
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280 // ----------------------------------------------------------------------------- |
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281 // CPhSrvMessengerRequestManager::NegotiatorRequestDelete |
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282 // |
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283 // Delete all space reserved for the subsession given as parameter. |
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284 // ----------------------------------------------------------------------------- |
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285 // |
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286 void CPhSrvMessengerRequestManager::NegotiatorRequestDelete( |
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287 CPhSrvSubSessionBase& aSubSession ) |
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288 { |
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289 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestDelete START" ); // debug print |
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290 |
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291 // Obtain the subsessions handle |
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292 const TInt handle = aSubSession.SubSessionUniqueHandle(); |
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293 |
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294 RMessengerArray* messengerObjects = MessengerArray(); |
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295 |
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296 // Now look for any object that match. |
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297 TInt count = messengerObjects->Count() - 1; |
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298 for( TInt i = count; i >= 0; i-- ) |
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299 { |
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300 CPhSrvMessengerObject* entry = ( *messengerObjects )[i]; |
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301 if ( entry->SubSessionHandle() == handle ) |
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302 { |
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303 // Found matching entry, so cancel it and clean up. |
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304 |
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305 // This object is not in handled objects anymore. |
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306 // This means also that objects receive is also canceled. |
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307 messengerObjects->Remove( i ); |
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308 |
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309 // Update the messenger chain, cancel Send. |
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310 UpdateMessengerChain( entry, EPhCltMesCommandCancelSend ); |
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311 |
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312 // Send and receive were canceled, so this entry can be destroyed. |
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313 delete entry; |
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314 } |
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315 } |
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316 _DPRINT( 4, "PhSrv.MRM.NegotiatorRequestDelete STOP" ); // debug print |
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317 } |
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318 |
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319 |
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320 // ----------------------------------------------------------------------------- |
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321 // CPhSrvMessengerRequestManager::UpdateMessengerChain |
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322 // |
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323 // Update the request objects. |
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324 // ----------------------------------------------------------------------------- |
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325 // |
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326 void CPhSrvMessengerRequestManager::UpdateMessengerChain( |
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327 CPhSrvMessengerObject* aEntry, |
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328 TPhCltMessengerCommand aCommand ) |
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329 { |
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330 _DPRINT( 4, "PhSrv.MRM.Negotiator.Update START" ); // debug print |
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331 |
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332 TInt err = KErrNone; |
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333 RMessengerArray* sendArray = SendChain(); |
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334 |
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335 |
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336 if ( aEntry ) |
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337 { |
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338 switch ( aCommand ) |
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339 { |
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340 case EPhCltMesCommandSend: |
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341 { |
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342 // If this is new request, append it to send queue. |
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343 if( sendArray->Find( aEntry ) == KErrNotFound ) |
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344 { |
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345 err = sendArray->Append( aEntry ); |
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346 if ( err ) |
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347 { |
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348 // Should never happen because of space pre-reservation |
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349 // in construction phase. However, recover. |
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350 |
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351 // If Append did not succeed, inform Sender of failure. |
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352 aEntry->InformOfMessengerRequest( |
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353 err, |
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354 EPhCltMesCommandSend ); |
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355 } |
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356 } |
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357 |
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358 // If Append was not performed or if it was successful. |
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359 if ( !err ) |
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360 { |
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361 // Handle all Send requests that exist. |
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362 HandleAllSendRequests( aEntry, sendArray ); |
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363 } |
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364 break; |
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365 } |
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366 case EPhCltMesCommandReceive: |
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367 case EPhCltMesCommandSkip: |
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368 case EPhCltMesCommandCancelReceive: |
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369 { |
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370 // Handle all Send requests that exist. |
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371 HandleAllSendRequests( NULL, sendArray ); |
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372 break; |
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373 } |
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374 |
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375 case EPhCltMesCommandCancelSend: |
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376 { |
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377 // Remove this Send object from chain. |
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378 // Pending Receive requests not completed. |
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379 TInt location = sendArray->Find( aEntry ); |
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380 if ( location >= 0 ) |
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381 { |
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382 // If this is the first object in Send chain, then |
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383 // Send request processing is canceled. |
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384 if( aEntry == ( *sendArray )[0] ) |
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385 { |
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386 iSendProcessOngoing = EFalse; |
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387 } |
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388 sendArray->Remove( location ); |
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389 } |
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390 |
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391 // Handle all other Send requests that exist. |
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392 HandleAllSendRequests( NULL, sendArray ); |
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393 break; |
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394 } |
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395 |
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396 default: |
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397 // Should never happen! |
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398 break; |
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399 } |
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400 } |
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401 _DPRINT( 4, "PhSrv.MRM.Negotiator.Update STOP" ); // debug print |
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402 } |
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403 |
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404 |
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405 // ----------------------------------------------------------------------------- |
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406 // CPhSrvMessengerRequestManager::HandleAllSendRequests |
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407 // |
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408 // |
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409 // ----------------------------------------------------------------------------- |
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410 // |
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411 void CPhSrvMessengerRequestManager::HandleAllSendRequests( |
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412 CPhSrvMessengerObject* aEntry, |
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413 RMessengerArray* aSendArray ) |
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414 { |
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415 CPhSrvMessengerObject* entry = aEntry; |
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416 |
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417 // If aEntry is NULL, try to set it as valid object. |
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418 if ( !entry ) |
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419 { |
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420 if ( aSendArray->Count() ) |
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421 { |
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422 entry = ( *aSendArray )[0]; // Take the first object in send chain. |
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423 } |
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424 } |
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425 |
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426 // Handle all Send requests that exists. |
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427 while ( HandleSendRequest( entry, aSendArray ) ) |
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428 { |
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429 entry = NULL; |
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430 if ( aSendArray->Count() ) |
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431 { |
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432 entry = ( *aSendArray )[0]; // Take the first object in send chain. |
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433 } |
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434 } |
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435 } |
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436 |
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437 |
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438 // ----------------------------------------------------------------------------- |
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439 // CPhSrvMessengerRequestManager::HandleSendRequest |
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440 // |
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441 // |
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442 // ----------------------------------------------------------------------------- |
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443 // |
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444 TBool CPhSrvMessengerRequestManager::HandleSendRequest( |
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445 CPhSrvMessengerObject* aEntry, |
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446 RMessengerArray* aSendArray ) |
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447 { |
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448 TBool ret = EFalse; |
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449 RMessengerArray* messengerObjects = MessengerArray(); |
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450 |
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451 |
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452 // Handling is done only if there is Send request and |
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453 // aEntry is valid object. |
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454 if( aSendArray->Count() && aEntry ) |
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455 { |
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456 if ( aEntry == ( *aSendArray )[0] ) |
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457 { |
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458 // This was the first Send operation so complete Receives. |
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459 |
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460 // Some pre-work needs to be done if this Send has not been |
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461 // handled before. |
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462 if( !iSendProcessOngoing ) |
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463 { |
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464 // Now this Send request process is ongoing. |
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465 iSendProcessOngoing = ETrue; |
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466 |
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467 const TInt sentDataLength = aEntry->GetSendDataLength(); |
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468 |
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469 if ( sentDataLength > |
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470 iDefaultSizeBuffer->Des().MaxLength() ) |
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471 { |
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472 // The sent data is longer than the default buffer. |
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473 // We need to try reserve bigger buffer. If this does not |
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474 // succeed, then only the current size buffer is used in |
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475 // sending. |
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476 |
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477 HBufC8* variableSizeBuffer = NULL; |
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478 variableSizeBuffer = HBufC8::New( sentDataLength ); |
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479 if ( variableSizeBuffer != NULL ) |
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480 { |
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481 // Reservation was successful, so use reserved buffer |
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482 // as a new default buffer. |
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483 // But first delete the old buffer. |
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484 if( iDefaultSizeBuffer ) |
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485 { |
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486 delete iDefaultSizeBuffer; |
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487 iDefaultSizeBuffer = NULL; |
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488 } |
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489 iDefaultSizeBuffer = variableSizeBuffer; |
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490 } |
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491 } |
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492 // Read the sent message. |
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493 TPtr8 ptr = iDefaultSizeBuffer->Des(); |
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494 aEntry->GetSendData( ptr ); |
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495 } |
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496 |
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497 |
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498 const TDesC8& sendData = *iDefaultSizeBuffer; |
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499 const TUid& senderUid = aEntry->GetUid(); |
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500 const TUint sentDataId = aEntry->SentDataId(); |
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501 |
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502 TBool completeSend = ETrue; |
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503 TInt interested = 0; |
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504 |
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505 TInt count = messengerObjects->Count(); |
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506 |
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507 //////////////////////////////////////////////////////// |
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508 // Check that all the objects are ready to receive. |
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509 //////////////////////////////////////////////////////// |
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510 for( TInt i = 0; i < count; i++ ) |
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511 { |
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512 CPhSrvMessengerObject* entry = ( *messengerObjects )[i]; |
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513 |
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514 // Check only other objects. |
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515 if ( aEntry->SubSessionHandle() != entry->SubSessionHandle() ) |
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516 { |
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517 // We need to care only of those objects that want to |
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518 // listen messages same type as the sent was. |
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519 if( senderUid == entry->GetUid() ) |
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520 { |
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521 // This object wants to receive this sent message. |
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522 interested++; |
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523 |
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524 if ( !entry->IsReadyToReceive( sendData, sentDataId ) ) |
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525 { |
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526 // The object was not ready to receive, so Send can |
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527 // not be completed yet. |
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528 completeSend = EFalse; |
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529 } |
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530 } |
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531 } |
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532 } |
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533 |
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534 |
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535 //////////////////////////////////////////////////////// |
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536 // If all objects were ready to receive, complete them. |
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537 // If there were no objects interested of the sent message, |
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538 // do nothing. |
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539 //////////////////////////////////////////////////////// |
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540 if ( completeSend && interested ) |
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541 { |
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542 for( TInt i = 0; i < count; i++ ) |
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543 { |
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544 CPhSrvMessengerObject* entry = ( *messengerObjects )[i]; |
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545 |
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546 // Complete only other's Receive requests. |
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547 if ( aEntry->SubSessionHandle() != |
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548 entry->SubSessionHandle() ) |
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549 { |
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550 // We complete only those object's receives that have |
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551 // the same category UID as the sent was. |
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552 if( senderUid == entry->GetUid() ) |
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553 { |
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554 TInt err = entry->CompleteReceive( |
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555 sendData, |
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556 sentDataId ); |
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557 if( err ) |
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558 { |
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559 // This should never fail because pre-check was |
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560 // successful. However, you can try to recover. |
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561 } |
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562 } |
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563 } |
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564 } |
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565 // All receives were compeled, so complete Send. |
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566 aEntry->InformOfMessengerRequest( |
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567 KErrNone, |
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568 EPhCltMesCommandSend ); |
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569 // Remove the object whose Send was handled from chain. |
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570 aSendArray->Remove( 0 ); |
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571 |
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572 // The send process was completed. |
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573 iSendProcessOngoing = EFalse; |
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574 |
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575 // Send was fully handled. |
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576 ret = ETrue; |
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577 } |
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578 } |
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579 } |
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580 return ret; |
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581 } |
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582 |
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583 |
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584 // ----------------------------------------------------------------------------- |
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585 // CPhSrvMessengerRequestManager::RequestAlreadyExists |
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586 // |
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587 // Check whether there already is request(s) for the subsession given as |
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588 // parameter. If not, then sets it active. |
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589 // ----------------------------------------------------------------------------- |
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590 // |
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591 TBool CPhSrvMessengerRequestManager::RequestAlreadyExists( |
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592 const CPhSrvSubSessionBase& aSubSession, |
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593 const TPhCltMessengerParameters& aParameters, |
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594 const RMessage2& aMessage ) |
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595 { |
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596 TBool isThereRequest = EFalse; |
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597 const TPhCltMessengerCommand command = aParameters.iMessengerCommand; |
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598 |
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599 // Check is only done for Send and Receive and Skip. |
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600 if ( command == EPhCltMesCommandSend || |
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601 command == EPhCltMesCommandReceive || |
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602 command == EPhCltMesCommandSkip ) |
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603 { |
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604 // Obtain the subsessions handle |
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605 const TInt handle = aSubSession.SubSessionUniqueHandle(); |
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606 |
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607 RMessengerArray* messengerObjects = MessengerArray(); |
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608 |
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609 // Look for any pending requests that match the handle. |
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610 TInt i = 0; |
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611 for( i = 0; i < messengerObjects->Count(); i++ ) |
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612 { |
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613 CPhSrvMessengerObject* entry = ( *messengerObjects )[i]; |
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614 if ( entry->SubSessionHandle() == handle ) |
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615 { |
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616 isThereRequest = entry->IsRequestActive( command ); |
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617 if ( !isThereRequest ) |
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618 { |
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619 TUint sentDataId = 0; |
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620 if( command == EPhCltMesCommandSend ) |
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621 { |
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622 // This was sent command, so set ID for it. |
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623 sentDataId = iSentDataIdGenerator; |
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624 // New Id for next sent message, must never be 0! |
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625 iSentDataIdGenerator++; |
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626 if( !iSentDataIdGenerator ) |
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627 { |
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628 // Value was 0, so set to 1. |
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629 iSentDataIdGenerator++; |
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630 } |
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631 } |
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632 // Request was not active, so set it active. |
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633 entry->SetActive( aParameters, aMessage, sentDataId ); |
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634 } |
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635 |
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636 // Set the object who initiated this request. |
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637 iRequestObject = entry; |
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638 break; |
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639 } |
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640 } |
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641 } |
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642 return isThereRequest; |
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643 } |
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644 |
|
645 |
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646 |
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647 // ----------------------------------------------------------------------------- |
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648 // CPhSrvMessengerRequestManager::MessengerArray |
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649 // |
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650 // |
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651 // ----------------------------------------------------------------------------- |
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652 // |
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653 RMessengerArray* CPhSrvMessengerRequestManager::MessengerArray() |
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654 { |
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655 return iMessengerObjects; |
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656 } |
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657 |
|
658 |
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659 // ----------------------------------------------------------------------------- |
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660 // CPhSrvMessengerRequestManager::SendChain |
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661 // |
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662 // |
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663 // ----------------------------------------------------------------------------- |
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664 // |
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665 RMessengerArray* CPhSrvMessengerRequestManager::SendChain() |
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666 { |
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667 return iSendChain; |
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668 } |
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669 |
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670 |
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671 // End of File |
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