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1 /* |
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2 * Copyright (c) 2006-2008 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: Sensor server channel implemetation |
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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 #ifndef SENSERVERCHANNEL_H |
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20 #define SENSERVERCHANNEL_H |
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21 |
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22 #include <e32base.h> |
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23 #include "sensrvtypes.h" |
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24 #include "sensrvchannelinfo.h" |
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25 #include "sensrvresourcechannelinfo.h" |
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26 #include "sensrvmessage.h" |
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27 #include "ssypropertyprovider.h" |
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28 #include "ssychanneldataprovider.h" |
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29 #include "sensrvgeneralproperties.h" |
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30 |
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31 class CSensrvTransaction; |
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32 class CSensrvPluginProxy; |
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33 class CSensrvTransactionQueue; |
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34 class CSensrvPropertyQueue; |
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35 class CSensrvChannelListener; |
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36 class CSensrvChannelBuffer; |
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37 class CSensrvConditionEvaluator; |
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38 |
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39 /** |
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40 * Implements channel related handling. |
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41 * |
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42 * @since S60 5.0 |
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43 */ |
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44 class CSensrvChannel : public CBase |
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45 { |
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46 public: |
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47 |
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48 /** |
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49 * Channel state. |
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50 */ |
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51 enum TSensrvChannelState |
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52 { |
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53 EChannelStateClosed, ///< Channel is closed |
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54 EChannelStateOpen, ///< Channel is open to at least one client |
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55 EChannelStateListening ///< Channel is listening for data |
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56 }; |
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57 |
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58 /** |
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59 * Two phase constructor |
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60 * |
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61 * @since S60 5.0 |
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62 * @param aInfo Channel info. |
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63 * @param aProxy Callback proxy. |
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64 * @return New CSensrvChannel instance |
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65 * @exception KErrNoMemory Out of memory |
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66 */ |
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67 static CSensrvChannel* NewL( const TSensrvResourceChannelInfo& aInfo, |
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68 CSensrvPluginProxy& aProxy ); |
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69 |
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70 /** |
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71 * Destructor. |
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72 */ |
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73 virtual ~CSensrvChannel(); |
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74 |
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75 /** |
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76 * Returns the channel id |
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77 * |
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78 * @since S60 5.0 |
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79 * @return Channel id. |
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80 */ |
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81 inline TSensrvChannelId Id() { return iId; }; |
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82 |
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83 /** |
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84 * Gets channel state. |
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85 * Called from both threads. |
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86 * |
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87 * @since S60 5.0 |
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88 * @return Current channel state |
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89 */ |
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90 inline TSensrvChannelState State() const { return iState; }; |
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91 |
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92 /** |
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93 * Gets parent proxy reference. |
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94 * Called from both threads. |
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95 * |
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96 * @since S60 5.0 |
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97 * @return Current channel state |
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98 */ |
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99 inline CSensrvPluginProxy& Proxy() { return iProxy; }; |
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100 |
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101 /** |
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102 * Gets data provider pointer. |
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103 * Called from SSY thread. |
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104 * |
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105 * @since S60 5.0 |
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106 * @return Current data provider pointer. Can be NULL. |
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107 */ |
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108 inline MSsyChannelDataProvider* DataProvider() { return iDataProvider; }; |
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109 |
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110 /** |
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111 * Gets property provider pointer. |
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112 * Called from SSY thread. |
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113 * |
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114 * @since S60 5.0 |
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115 * @return Current property provider pointer. Can be NULL. |
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116 */ |
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117 inline MSsyPropertyProvider* PropertyProvider() { return iPropertyProvider; }; |
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118 |
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119 /** |
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120 * Gets data buffer pointer. |
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121 * Called from SSY thread. |
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122 * |
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123 * @since S60 5.0 |
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124 * @return Data buffer pointer. Can be NULL. |
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125 */ |
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126 inline CSensrvChannelBuffer* Buffer() { return iChannelBuffer; }; |
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127 |
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128 /** |
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129 * Gets maximum allowed buffering count. |
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130 * Called from server thread. |
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131 * |
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132 * @since S60 5.0 |
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133 * @return Maximum allowed buffering count |
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134 */ |
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135 inline TInt MaxBufferingCount() { return iMaxBufferingCount; }; |
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136 |
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137 /** |
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138 * Gets the persistent ETransTypeMediatorNewDataAvailable transaction. |
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139 * Called from SSY thread. |
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140 * |
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141 * @since S60 5.0 |
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142 * @return ETransTypeMediatorNewDataAvailable transaction |
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143 */ |
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144 inline CSensrvTransaction* DataAvailableTransaction() const { return iDataAvailableTransaction; }; |
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145 |
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146 /** |
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147 * Gets the persistent ETransTypeMediatorPropertyChanged transaction. |
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148 * Called from SSY thread. |
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149 * |
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150 * @since S60 5.0 |
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151 * @return ETransTypeMediatorPropertyChanged transaction. |
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152 */ |
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153 inline CSensrvTransaction* PropertyChangedTransaction() const { return iPropertyChangedTransaction; }; |
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154 |
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155 /** |
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156 * Gets the persistent ETransTypeMediatorForceBufferFilled transaction. |
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157 * Called from server thread. |
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158 * |
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159 * @since S60 5.0 |
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160 * @return ETransTypeMediatorForceBufferFilled transaction |
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161 */ |
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162 inline CSensrvTransaction* ForceBufferFilledTransaction() const { return iForceBufferFilledTransaction; }; |
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163 |
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164 /** |
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165 * Gets the persistent ETransTypeMediatorForceChannelClose transaction. |
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166 * Called from SSY thread. |
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167 * |
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168 * @since S60 5.0 |
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169 * @return ETransTypeMediatorForceChannelClose transaction |
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170 */ |
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171 inline CSensrvTransaction* ForceChannelCloseTransaction() const { return iForceChannelCloseTransaction; }; |
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172 |
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173 /** |
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174 * Gets the listener count. |
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175 * Called from server thread. |
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176 * |
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177 * @since S60 5.0 |
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178 * @return Listener count. |
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179 */ |
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180 inline TInt ListenerCount() const { return iListenerList.Count(); }; |
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181 |
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182 /** |
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183 * Gets the data item size |
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184 * Called from server thread. |
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185 * |
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186 * @since S60 5.0 |
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187 * @return Data item size |
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188 */ |
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189 inline TInt DataItemSize() const { return iChannelInfo.iDataItemSize; }; |
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190 |
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191 /** |
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192 * Handles client message. |
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193 * Message completion responsibility transfers. |
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194 * Called only within server thread. |
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195 * |
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196 * @since S60 5.0 |
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197 * @param aMessage The message containing the client request. |
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198 */ |
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199 void DispatchMessage( CSensrvMessage& aMessage ); |
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200 |
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201 /** |
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202 * Indicates channel has been opened by SSY |
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203 * Called from SSY thread only. |
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204 * |
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205 * @since S60 5.0 |
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206 * @param aErrorCode Indicates any error that occurred during channel opening. |
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207 * @param aDataProvider Pointer to channel data provider instance |
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208 * @param aSensorPropertyProvider Pointer to sensor property provider instance |
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209 */ |
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210 void ChannelOpened( TInt aErrorCode, |
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211 MSsyChannelDataProvider* aDataProvider, |
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212 MSsyPropertyProvider* aSensorPropertyProvider ); |
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213 |
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214 /** |
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215 * Indicates channel has been closed by SSY |
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216 * Called from SSY thread only. |
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217 * |
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218 * @since S60 5.0 |
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219 */ |
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220 void ChannelClosed(); |
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221 |
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222 /** |
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223 * Store a changed property provided by SSY. |
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224 * Called from SSY thread only. |
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225 * |
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226 * @since S60 5.0 |
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227 * @param aProperty Property that has changed |
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228 * @param aIgnoreSession Do not store change for this session. Can be NULL. |
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229 * @return ETrue if property was stored to any listener. |
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230 */ |
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231 TBool StoreChangedProperty( const TSensrvProperty& aProperty, |
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232 const CSensrvSession* aIgnoreSession ); |
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233 |
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234 /** |
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235 * Completes transaction after it has been handled by SSY. |
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236 * Only called from server thread. |
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237 * |
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238 * @since S60 5.0 |
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239 * @param aTransaction The transaction to complete |
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240 */ |
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241 void CompleteTransaction( CSensrvTransaction* aTransaction ); |
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242 |
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243 /** |
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244 * Cleans up session related data. |
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245 * |
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246 * @since S60 5.0 |
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247 * @param aSession The session that was deleted |
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248 */ |
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249 void SessionTerminated( CSensrvSession* aSession ); |
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250 |
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251 /** |
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252 * Handles notify failure at SSY |
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253 * |
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254 * @since S60 5.0 |
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255 */ |
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256 void HandleSsyNotifyFailure(); |
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257 |
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258 /** |
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259 * Forces buffer filled at SSY |
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260 * |
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261 * @since S60 5.0 |
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262 */ |
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263 void ForceBufferFilled(); |
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264 |
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265 /** |
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266 * Recalculates buffering count, if there is more than one |
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267 * client. |
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268 * |
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269 * @since S60 5.0 |
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270 * @return The new buffering count. If returned value is zero, |
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271 * it means there are no listeners in channel. |
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272 */ |
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273 TInt RecalculateBufferingCount(); |
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274 |
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275 /** |
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276 * Creates a new condition evaluator or returns an existing one. |
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277 * |
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278 * @since S60 5.0 |
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279 * @return The condition evaluator reference. |
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280 */ |
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281 CSensrvConditionEvaluator* ConditionEvaluatorL(); |
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282 |
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283 /** |
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284 * Get clients of this channel. The client identified by aCallerSecureId |
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285 * is not added to the affected clients list. |
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286 * |
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287 * @since S60 5.0 |
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288 * @param[in,out] aAffectedClients On return contains client |
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289 * processes priorities for this channel. |
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290 * @param[in] aCallerSecureId Identifies the listener which is filtered away. |
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291 */ |
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292 void GetAffectedClients( RArray<TInt>& aAffectedClients, |
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293 TSecureId aCallerSecureId ); |
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294 |
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295 /** |
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296 * Gets listener for session. |
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297 * |
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298 * @since S60 5.0 |
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299 * @param aSession Session for which the listener is needed. |
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300 * @return Listener pointer or NULL if not found. |
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301 */ |
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302 CSensrvChannelListener* GetListener(CSensrvSession* aSession); |
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303 |
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304 /** |
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305 * Takes the property set control. |
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306 * Required priority checks must be done by client before using this method. |
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307 * |
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308 * @since S60 5.0 |
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309 * @param[in] aListener The listener that takes control or NULL if control is freed. |
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310 */ |
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311 void TakePropertySetControl( CSensrvChannelListener* aListener ); |
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312 |
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313 /** |
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314 * Gets the listener that has taken the property set control. |
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315 * |
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316 * @since S60 5.0 |
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317 * @return The listener that has taken the property set control or NULL if control has not been taken. |
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318 */ |
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319 inline CSensrvChannelListener* TakenPropertySetControl() const { return iCurrentSetPropertyControl; }; |
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320 |
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321 /** |
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322 * Gets the highest priority listener and its multiples from this channel. |
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323 * |
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324 * @since S60 5.0 |
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325 * @param[out] aHighestPriority Stores the highest priority. |
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326 * @return Multiples of highest listener priority |
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327 */ |
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328 TInt GetHighestListenerPriority( TInt& aHighestPriority ); |
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329 |
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330 /** |
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331 * Gets channel group |
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332 * Called from server thread. |
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333 * |
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334 * @since S60 5.0 |
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335 * @return Channel group. |
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336 */ |
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337 TSensrvResourceChannelInfo::TSensrvChannelGroup ChannelGroup(); |
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338 |
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339 private: |
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340 |
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341 /** |
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342 * C++ constructor |
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343 * |
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344 * @since S60 5.0 |
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345 * @param aInfo Channel info. |
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346 * @param aProxy Callback proxy. |
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347 */ |
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348 CSensrvChannel(const TSensrvChannelInfo& aInfo, |
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349 CSensrvPluginProxy& aProxy); |
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350 |
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351 /** |
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352 * 2nd phase of construction |
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353 * |
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354 * @since S60 5.0 |
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355 */ |
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356 void ConstructL(); |
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357 |
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358 /** |
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359 * Handles next transaction in queue. |
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360 * If first transaction is still executing |
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361 * or the queue is empty, does nothing. |
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362 * |
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363 * @since S60 5.0 |
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364 */ |
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365 void HandleNextTransaction(); |
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366 |
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367 /** |
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368 * Deletes a listener. |
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369 * |
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370 * @since S60 5.0 |
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371 * @param aSession Session for which the listener is deleted. |
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372 */ |
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373 void DeleteListener(CSensrvSession* aSession); |
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374 |
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375 /** |
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376 * Finds a listener by session. |
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377 * |
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378 * @since S60 5.0 |
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379 * @param aSession Session for which the listener is found. |
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380 */ |
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381 CSensrvChannelListener* FindListener( CSensrvSession* aSession ); |
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382 |
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383 /** |
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384 * Closes the channel to SSY if there are no listeners. |
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385 * |
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386 * @since S60 5.0 |
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387 */ |
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388 void CloseIfNeeded(); |
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389 |
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390 /** |
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391 * Handles start data and condition listening transactions |
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392 * |
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393 * @since S60 5.0 |
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394 * @param aTransaction Reference to the transaction. |
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395 * @return Error code |
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396 */ |
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397 TInt HandleStartListeningTransaction(CSensrvTransaction& aTransaction); |
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398 |
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399 /** |
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400 * Handles stop data and condition listening transactions |
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401 * |
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402 * @since S60 5.0 |
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403 * @param aTransaction Reference to the transaction. |
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404 * @param[out] aSsyTransactionNeeded Returns ETrue if SSY transaction is needed. |
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405 * @return Error code |
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406 */ |
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407 TInt HandleStopListeningTransaction(CSensrvTransaction& aTransaction, |
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408 TBool& aSsyTransactionNeeded); |
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409 |
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410 /** |
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411 * Gets the highest priority listener and its multiples from all affected channels. |
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412 * |
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413 * @since S60 5.0 |
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414 * @param[out] aHighestPriority Stores the highest priority. |
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415 * @return Multiples of highest listener priority |
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416 */ |
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417 TInt GetHighestListenerPriorityOfAffectedChannels( TInt& aHighestPriority ); |
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418 |
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419 /** |
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420 * Updated set property success indication to channel listeners |
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421 * |
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422 * @since S60 5.0 |
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423 * @param[in] aChannel Channel to update |
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424 * @param aHighestOfAffectedChannels Highest priority of affected channels |
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425 * @param aMultiplesOnAffectedChannels Multiples of highest priority listeners |
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426 */ |
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427 static void UpdateSetPropertySuccessIndToChannelListeners( |
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428 CSensrvChannel& aChannel, TInt aHighestOfAffectedChannels, TInt aMultiplesOnAffectedChannels ); |
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429 |
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430 /** |
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431 * Handles set property success indications on property change |
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432 * |
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433 * @since S60 5.0 |
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434 */ |
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435 void HandleSetPropertySuccessIndOnPropertyChange(); |
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436 |
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437 /** |
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438 * Handles set property success indications on listener creation or deletion |
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439 * |
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440 * @since S60 5.0 |
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441 */ |
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442 void HandleSetPropertySuccessIndOnCreateOrDelete(); |
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443 |
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444 |
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445 /** |
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446 * Handles dependent channels on channel open |
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447 * |
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448 * @since S60 5.0 |
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449 */ |
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450 void HandleDependencyOnOpen(); |
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451 |
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452 /** |
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453 * Handles dependent channels on channel close |
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454 * |
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455 * @since S60 5.0 |
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456 */ |
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457 void HandleDependencyOnClose( const TInt& aPriority ); |
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458 |
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459 /** |
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460 * Sets dependent channel availability |
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461 * |
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462 * @since S60 5.0 |
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463 */ |
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464 TInt SetAvailability( TSensrvChannelId aChannelId, TSensrvProperty& aProperty, TSensrvAvailability aValue, const TSecurityInfo& aSecurityInfo ); |
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465 |
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466 /** |
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467 * Sets dependent channel availability |
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468 * |
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469 * @since S60 5.0 |
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470 */ |
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471 TInt SetChannelAvailability( TSensrvChannelId aChannelIdToEnable, TSensrvChannelId aChannelIdToDisable, TSensrvProperty& aProperty ); |
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472 |
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473 /** |
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474 * Sets dependent channel availability |
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475 * |
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476 * @since S60 5.0 |
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477 */ |
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478 TInt SetChannelAvailability( TSensrvChannelId aChannelId, TSensrvProperty& aProperty, TSensrvAvailability aValue ); |
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479 |
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480 /** |
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481 * Get channel from affected channels list with the lowest priority |
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482 * |
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483 * @since S60 5.0 |
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484 */ |
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485 TInt GetLowestChannelPriority( const RSensrvChannelList* aAffectedChannelsList, TSensrvChannelId& aChannelId ); |
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486 |
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487 |
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488 /** |
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489 * Get channel from affected channels list with the highest priority |
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490 * |
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491 * @since S60 5.0 |
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492 */ |
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493 TInt GetHighestChannelPriority( const RSensrvChannelList* aAffectedChannelsList, TSensrvChannelId& aChannelId ); |
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494 |
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495 /** |
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496 * Gets the affected channel list from SSY |
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497 * |
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498 * @since S60 5.0 |
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499 * @return Affected channel list or NULL |
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500 */ |
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501 RSensrvChannelList* GetAffectedChannels() const; |
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502 |
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503 /** |
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504 * Gets the affected channel list from SSY |
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505 * |
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506 * @since S60 5.0 |
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507 * @return Affected channel list or NULL |
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508 */ |
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509 RSensrvChannelList* GetAvailabilityAffectedChannels( TSensrvAvailability aValue ) const; |
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510 |
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511 /** |
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512 * Reads channel group |
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513 * |
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514 * @since S60 5.0 |
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515 * @return Channel group. |
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516 */ |
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517 TSensrvResourceChannelInfo::TSensrvChannelGroup ReadChannelGroup(); |
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518 |
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519 /** |
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520 * Handles channel availability property change |
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521 * |
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522 * @since S60 5.0 |
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523 */ |
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524 void HandleAvailabilityChange( const TSensrvProperty& aProperty ); |
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525 |
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526 /** |
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527 * Handles channel availability property change |
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528 * |
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529 * @since S60 5.0 |
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530 */ |
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531 void HandleAvailabilityChange( const TSensrvAvailability& value ); |
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532 |
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533 /** |
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534 * Handles channel availability property change to unavailabe |
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535 * |
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536 * @since S60 5.0 |
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537 */ |
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538 void CSensrvChannel::SetChannelUnavailable( ); |
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539 |
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540 /** |
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541 * Handles channel availability property change to availabe |
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542 * |
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543 * @since S60 5.0 |
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544 */ |
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545 void CSensrvChannel::SetChannelAvailable( ); |
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546 |
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547 private: // Member variables |
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548 |
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549 /** |
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550 * Channel identifier of this channel. |
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551 */ |
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552 TSensrvChannelId iId; |
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553 |
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554 /** |
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555 * Transaction queue for transactions targeting this channel. |
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556 * Own. iChannelQueue owns the queued transactions. |
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557 */ |
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558 CSensrvTransactionQueue* iChannelQueue; |
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559 |
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560 /** |
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561 * Current channel state |
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562 */ |
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563 TSensrvChannelState iState; |
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564 |
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565 /** |
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566 * Callback proxy |
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567 */ |
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568 CSensrvPluginProxy& iProxy; |
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569 |
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570 /** |
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571 * Channel listener array for open clients |
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572 * Listed listeners are owned. |
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573 */ |
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574 RPointerArray<CSensrvChannelListener> iListenerList; |
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575 |
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576 /** |
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577 * Channel buffer. |
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578 * Own. |
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579 */ |
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580 CSensrvChannelBuffer* iChannelBuffer; |
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581 |
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582 /** |
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583 * Data provider residing in SSY thread heap. |
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584 * Can safely be accessed only from SSY thread. |
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585 * Not Own, owned by SSY. |
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586 */ |
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587 MSsyChannelDataProvider* iDataProvider; |
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588 |
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589 /** |
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590 * Sensor property provider residing in SSY thread heap. |
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591 * Can safely be accessed only from SSY thread. |
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592 * Not Own, owned by SSY. |
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593 */ |
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594 MSsyPropertyProvider* iPropertyProvider; |
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595 |
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596 /** |
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597 * Transaction for notifying new data from SSY to Server. |
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598 * It is stored and reused to both avoid repeatedly |
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599 * constructing and deleting it and to ensure it always |
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600 * exists, as the transaction is initiated by SSY. |
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601 * Own. |
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602 */ |
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603 CSensrvTransaction* iDataAvailableTransaction; |
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604 |
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605 /** |
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606 * Transaction for notifying buffer filled must be forced. |
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607 * It is stored and reused to avoid repeatedly |
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608 * constructing and deleting it. |
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609 * Own. |
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610 */ |
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611 CSensrvTransaction* iForceBufferFilledTransaction; |
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612 |
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613 /** |
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614 * Transaction for notifying channel close must be forced. |
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615 * It is stored and reused to ensure it always |
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616 * exists, as the transaction is initiated by SSY. |
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617 * Own. |
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618 */ |
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619 CSensrvTransaction* iForceChannelCloseTransaction; |
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620 |
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621 /** |
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622 * Indicates outstanding explicit buffer fill request. |
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623 */ |
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624 TBool iForcingBufferFilled; |
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625 |
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626 /** |
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627 * Indicates maximum buffering count. |
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628 */ |
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629 TInt iMaxBufferingCount; |
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630 |
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631 /** |
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632 * Transaction for notifying property change from SSY to Server |
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633 * Own. |
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634 */ |
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635 CSensrvTransaction* iPropertyChangedTransaction; |
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636 |
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637 /** |
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638 * Condition evaluator plugin. |
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639 * Own. |
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640 */ |
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641 CSensrvConditionEvaluator* iConditionEvaluator; |
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642 |
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643 /** |
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644 * Channel info of this channel. |
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645 */ |
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646 TSensrvResourceChannelInfo iChannelInfo; |
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647 |
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648 /** |
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649 * The channel listener that has taken the property set control. |
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650 * Not own. |
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651 */ |
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652 CSensrvChannelListener* iCurrentSetPropertyControl; |
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653 |
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654 /** |
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655 * Highest listener priority of the channel. |
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656 */ |
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657 TInt iHighestListenerPriority; |
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658 |
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659 /** |
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660 * Multiples of highest listener priority. |
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661 * If there are no listeners on this channel, value is zero. |
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662 * If there is single listener with the highest priority, value is one, etc. |
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663 */ |
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664 TInt iHighestListenerPriorityMultiples; |
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665 |
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666 }; |
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667 |
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668 |
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669 |
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670 #endif // SENSERVERCHANNEL_H |