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1 /* |
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2 * Copyright (c) 2007-2008 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: Implementation of the base class of signal level handler |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 #include "vccsignallevelhandler.h" |
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21 #include "vccsignallevelobserver.h" |
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22 #include "rubydebug.h" |
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23 |
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24 |
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25 // Min. signal strength in absolut dBm, i.e. the value |
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26 // in real world is -110 dBm (so quite weak). |
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27 static const TInt32 KStrengthMin = 110; |
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28 |
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29 // --------------------------------------------------------------------------- |
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30 // C++ destructor. |
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31 // --------------------------------------------------------------------------- |
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32 // |
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33 CVccSignalLevelHandler::~CVccSignalLevelHandler() |
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34 { |
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35 // Cancel any outstanding requests. |
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36 Cancel(); |
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37 |
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38 iStrength = 0; |
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39 } |
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40 |
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41 // --------------------------------------------------------------------------- |
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42 // Symbian second-phase constructor. |
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43 // --------------------------------------------------------------------------- |
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44 // |
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45 void CVccSignalLevelHandler::ConstructL() |
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46 { |
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47 CTimer::ConstructL(); |
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48 } |
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49 |
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50 // --------------------------------------------------------------------------- |
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51 // C++ constructor. |
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52 // --------------------------------------------------------------------------- |
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53 // |
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54 CVccSignalLevelHandler::CVccSignalLevelHandler( |
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55 MVccSignalLevelObserver& aObserver, |
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56 const TSignalLevelParams& aParams ) |
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57 : CTimer( EPriorityStandard ), |
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58 iObserver( aObserver ), |
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59 iParams( aParams ) |
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60 { |
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61 CActiveScheduler::Add( this ); |
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62 } |
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63 |
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64 // --------------------------------------------------------------------------- |
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65 // Star signal level observing. |
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66 // --------------------------------------------------------------------------- |
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67 // |
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68 void CVccSignalLevelHandler::StartL() |
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69 { |
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70 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StartL" ); |
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71 |
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72 if ( !iNotificationsOn ) |
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73 { |
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74 EnableNotificationsL(); |
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75 iNotificationsOn = ETrue; |
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76 } |
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77 |
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78 RUBY_DEBUG0( " -call Cancel()" ); |
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79 Cancel(); |
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80 |
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81 RUBY_DEBUG0( " -call GetStrength()" ); |
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82 GetStrength(); |
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83 |
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84 RUBY_DEBUG1( " -iStrength = %d, set op = EOperationGet \ |
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85 state = EStrengthUnknown", iStrength ); |
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86 |
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87 iOperation = EOperationGet; |
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88 |
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89 iState = EStrengthUnknown; |
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90 |
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91 RUBY_DEBUG0( " -call SetActive()" ); |
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92 SetActive(); |
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93 } |
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94 |
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95 // --------------------------------------------------------------------------- |
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96 // Stop signal level observing. |
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97 // --------------------------------------------------------------------------- |
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98 // |
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99 void CVccSignalLevelHandler::Stop() |
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100 { |
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101 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::Stop "); |
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102 |
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103 DisableNotifications(); |
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104 |
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105 iNotificationsOn = EFalse; |
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106 |
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107 iStrength = 0; |
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108 |
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109 Cancel(); |
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110 } |
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111 |
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112 // --------------------------------------------------------------------------- |
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113 // Set new parameters. |
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114 // --------------------------------------------------------------------------- |
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115 // |
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116 void CVccSignalLevelHandler::SetParams( const TSignalLevelParams& aParams ) |
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117 { |
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118 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::SetParams" ); |
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119 iParams = aParams; |
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120 } |
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121 |
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122 // --------------------------------------------------------------------------- |
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123 // Handles getting the signal strength and notifying the observer about |
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124 // strength changes. |
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125 // --------------------------------------------------------------------------- |
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126 // |
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127 void CVccSignalLevelHandler::RunL() |
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128 { |
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129 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::RunL" ); |
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130 |
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131 // Zero (0) is not acceptable. |
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132 if ( !iStrength ) |
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133 { |
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134 RUBY_DEBUG0( " -0 strength not acceptable, setting to KStrengthMin"); |
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135 iStrength = KStrengthMin; |
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136 } |
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137 |
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138 RUBY_DEBUG3( " -iStrength = %d iState = %d iOp = %d", iStrength, iState, iOperation ); |
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139 |
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140 switch ( iOperation ) |
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141 { |
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142 case EOperationGet: |
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143 { |
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144 |
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145 // We are in the Get-mode to get the signal strength. |
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146 // If the strength is < than the high level (== the strength |
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147 // is good), start timer to check if we are still in good level |
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148 // after the timer completes. |
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149 // The same is done if we have a low level (== bad). |
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150 |
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151 RUBY_DEBUG0( " -EOperationGet"); |
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152 |
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153 if ( iStrength <= iParams.iHighLevel && iStrength > 0 ) |
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154 { |
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155 RUBY_DEBUG0( " set state = EStrengthHigh, op = EOperationWait" ); |
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156 |
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157 After( iParams.iHighTimeout ); |
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158 iState = EStrengthHigh; |
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159 iOperation = EOperationWait; |
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160 } |
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161 else if ( iStrength >= iParams.iLowLevel ) |
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162 { |
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163 RUBY_DEBUG0( " set state = EStrengtLow, op = EOperationWait" ); |
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164 After( iParams.iLowTimeout ); |
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165 iState = EStrengthLow; |
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166 iOperation = EOperationWait; |
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167 } |
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168 else |
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169 { |
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170 RUBY_DEBUG0( " strength between low and high, set op = EOperationNone" ); |
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171 |
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172 iOperation = EOperationNone; |
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173 // PCLint |
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174 } |
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175 break; |
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176 } |
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177 |
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178 case EOperationWait: |
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179 { |
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180 |
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181 // Timer has completed. Check the signal level again. |
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182 |
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183 RUBY_DEBUG0( " -EOperationWait" ); |
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184 RUBY_DEBUG0( " set op = EOperationComplete" ); |
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185 GetStrength(); |
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186 |
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187 SetActive(); |
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188 |
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189 iOperation = EOperationComplete; |
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190 |
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191 break; |
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192 } |
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193 |
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194 case EOperationComplete: |
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195 { |
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196 // Checking signal strength is now done. |
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197 // Notify our observer (if needed). |
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198 |
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199 RUBY_DEBUG1( " -EOperationComplete, iStrength = %d", iStrength ); |
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200 |
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201 // Do we have a good signal level? |
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202 if ( iStrength <= iParams.iHighLevel && iStrength > 0 && iState == EStrengthHigh ) |
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203 { |
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204 RUBY_DEBUG0( " -if ( iStrength <= iParams.iHighLevel" ); |
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205 NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassNormal ); |
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206 } |
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207 // Or do we have a bad signal level? |
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208 else if ( iStrength >= iParams.iHighLevel && iState == EStrengthLow ) |
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209 { |
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210 RUBY_DEBUG0( " -else if ( iStrength >= iParams.iHighLevel" ); |
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211 NotifyChanges( iStrength, MVccSignalLevelObserver::ESignalClassWeak ); |
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212 } |
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213 else |
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214 { |
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215 // PCLint |
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216 } |
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217 |
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218 iOperation = EOperationNone; |
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219 |
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220 break; |
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221 } |
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222 |
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223 default: |
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224 { |
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225 break; |
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226 } |
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227 } |
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228 } |
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229 |
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230 // --------------------------------------------------------------------------- |
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231 // Handles signal strength changes notified by the subsystem |
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232 // (either the WLAN or the GSM). |
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233 // --------------------------------------------------------------------------- |
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234 // |
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235 void CVccSignalLevelHandler::StrengthChanged() |
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236 { |
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237 |
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238 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::StrengthChanged" ); |
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239 |
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240 // The zero (0) is not good. |
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241 if ( !iStrength ) |
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242 { |
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243 iStrength = KStrengthMin; |
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244 } |
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245 |
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246 RUBY_DEBUG3( " -iStrength = %d, iState = %d, iOp = %d", |
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247 iStrength, iState, iOperation); |
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248 |
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249 // Check in which direction the signal strength changed |
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250 // and start the timeout timer to see if the signal level |
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251 // stays at that (new) level. |
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252 |
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253 RUBY_DEBUG1( " -iHighLevel = %d", iParams.iHighLevel ); |
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254 RUBY_DEBUG1( " -iLowLevel = %d", iParams.iLowLevel ); |
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255 if ( iStrength <= iParams.iHighLevel && iStrength > 0 ) // && |
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256 //( iState == EStrengthLow || iState == EStrengthUnknown ) ) |
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257 { |
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258 // Cancel outstanding timer in all the cases |
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259 Cancel(); |
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260 // We have a good level after a bad one. |
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261 |
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262 RUBY_DEBUG0( " -call After( hightimeout ), set state = High, op = Wait"); |
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263 After( iParams.iHighTimeout ); |
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264 iState = EStrengthHigh; |
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265 iOperation = EOperationWait; |
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266 } |
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267 else if ( iStrength >= iParams.iLowLevel ) //&& |
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268 //( iState == EStrengthHigh || iState == EStrengthUnknown ) ) |
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269 { |
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270 // Cancel outstanding timer in all the cases |
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271 Cancel(); |
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272 // We have a bad level after a good one. |
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273 |
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274 RUBY_DEBUG0( " -call After( lowtimeout ), set state = Low, op = Wait"); |
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275 |
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276 After ( iParams.iLowTimeout ); |
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277 iState = EStrengthLow; |
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278 iOperation = EOperationWait; |
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279 } |
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280 else |
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281 { |
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282 RUBY_DEBUG0( "-EOperationNone "); |
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283 iOperation = EOperationNone; |
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284 } |
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285 } |
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286 |
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287 // --------------------------------------------------------------------------- |
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288 // Cancel outstanding requests. |
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289 // --------------------------------------------------------------------------- |
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290 // |
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291 void CVccSignalLevelHandler::DoCancel() |
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292 { |
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293 RUBY_DEBUG_BLOCK( "CVccSignalLevelHandler::DoCancel" ); |
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294 switch ( iOperation ) |
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295 { |
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296 case EOperationWait: |
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297 { |
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298 RUBY_DEBUG0( "EOperationWait" ); |
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299 CTimer::DoCancel(); |
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300 |
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301 break; |
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302 } |
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303 |
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304 case EOperationGet: |
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305 // fall-through intended here |
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306 case EOperationComplete: |
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307 { |
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308 RUBY_DEBUG0( "EOperationGet / EOperationComplete" ); |
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309 CancelGetStrength(); |
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310 |
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311 break; |
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312 } |
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313 |
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314 default: |
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315 { |
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316 break; |
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317 } |
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318 } |
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319 } |