1 /* |
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2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: An example implementation for ISC Driver Reference |
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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 FILES |
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21 |
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22 #include <kernel.h> |
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23 #include <IscDefinitions.h> |
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24 #include "IscChannel.h" |
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25 #include "IscChannelContainer.h" |
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26 #include "IscTrace.h" |
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27 |
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28 #ifdef __WINS__ |
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29 #include <windows.h> |
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30 #endif |
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31 |
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32 // EXTERNAL DATA STRUCTURES |
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33 |
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34 // EXTERNAL FUNCTION PROTOTYPES |
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35 |
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36 // CONSTANTS |
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37 const TInt KChannelComplitionDfcPriority( 2 ); |
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38 |
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39 // MACROS |
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40 |
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41 // LOCAL CONSTANTS AND MACROS |
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42 DIscChannel* IscChannelContainer::iIscChannels[KIscNumberOfUnits][KIscMaxNumberOfChannelSharers]; |
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43 TDfc* IscChannelContainer::iDfc = NULL; |
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44 |
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45 // MODULE DATA STRUCTURES |
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46 |
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47 // LOCAL FUNCTION PROTOTYPES |
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48 |
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49 // FORWARD DECLARATIONS |
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50 #ifdef __WINS__ |
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51 CRITICAL_SECTION g_IscCriticalSection; |
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52 #endif |
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53 |
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54 // ============================ MEMBER FUNCTIONS =============================== |
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55 |
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56 |
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57 // ----------------------------------------------------------------------------- |
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58 // IscChannelContainer::SetChannel |
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59 // Set pointer to channel |
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60 // ( other items were commented in a header ). |
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61 // ----------------------------------------------------------------------------- |
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62 // |
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63 EXPORT_C TInt IscChannelContainer::SetChannel( |
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64 DIscChannel* aChannel, |
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65 const TUint16 aUnit ) |
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66 { |
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67 C_TRACE( ( _T( "IscChannelContainer::SetChannel(0x%x, 0x%x)" ), aChannel, aUnit ) ); |
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68 TInt error( KErrNoMemory ); |
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69 |
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70 //check values |
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71 if ( aUnit < KIscNumberOfUnits ) |
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72 { |
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73 for ( TInt i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ ) |
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74 { |
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75 if ( !iIscChannels[aUnit][i] ) |
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76 { |
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77 iIscChannels[aUnit][i] = aChannel; |
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78 error = KErrNone; |
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79 break; |
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80 } |
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81 } |
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82 } |
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83 else |
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84 { |
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85 ASSERT_RESET_ALWAYS( 0, "IscDriver",EIscPanicSetChannel ); |
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86 } |
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87 |
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88 C_TRACE( ( _T( "IscChannelContainer::SetChannel - return 0x%x" ), error ) ); |
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89 return error; |
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90 } |
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91 |
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92 // ----------------------------------------------------------------------------- |
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93 // IscChannelContainer::Channel |
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94 // Return pointer to channel |
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95 // ( other items were commented in a header ). |
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96 // ----------------------------------------------------------------------------- |
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97 // |
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98 DIscChannel* IscChannelContainer::Channel( |
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99 const TUint16 aChannel, |
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100 const TUint16 aChannelSharingIndex ) |
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101 { |
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102 TRACE_ASSERT( aChannel < KIscNumberOfUnits ); |
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103 TRACE_ASSERT( aChannelSharingIndex < KIscMaxNumberOfChannelSharers ); |
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104 return( iIscChannels[ aChannel ][ aChannelSharingIndex ] ); |
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105 } |
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106 |
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107 // ----------------------------------------------------------------------------- |
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108 // IscChannelContainer::RemoveChannel |
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109 // |
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110 // ( other items were commented in a header ). |
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111 // ----------------------------------------------------------------------------- |
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112 // |
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113 TInt IscChannelContainer::RemoveChannel |
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114 ( |
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115 DIscChannel* aChannel |
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116 ) |
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117 { |
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118 |
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119 TRACE_ASSERT( aChannel ); |
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120 C_TRACE( ( _T( "IscChannelContainer::RemoveChannel(0x%x)" ), aChannel ) ); |
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121 TUint16 channelNumber = aChannel->GetChannelNumber(); |
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122 |
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123 TInt error( KErrNotFound ); |
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124 for ( TInt i( KErrNone ); ( i < KIscMaxNumberOfChannelSharers ) && ( KErrNone != error ); i++ ) |
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125 { |
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126 if ( iIscChannels[channelNumber][i] == aChannel ) |
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127 { |
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128 iIscChannels[channelNumber][i] = NULL; |
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129 error = KErrNone; |
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130 } |
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131 } |
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132 |
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133 C_TRACE( ( _T( "IscChannelContainer::RemoveChannel - return %d" ), error ) ); |
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134 return error; |
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135 |
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136 } |
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137 |
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138 // ----------------------------------------------------------------------------- |
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139 // IscChannelContainer::ChannelComplition |
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140 // Goes through channels and open ones are emptied |
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141 // ( other items were commented in a header ). |
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142 // ----------------------------------------------------------------------------- |
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143 // |
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144 void IscChannelContainer::ChannelComplition( |
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145 TAny* /*a*/ ) |
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146 { |
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147 C_TRACE( ( _T( "IscChannelContainer::ChannelComplition()" ) ) ); |
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148 #ifdef __WINS__ |
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149 EnterCriticalSection( &g_IscCriticalSection ); |
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150 #endif |
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151 |
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152 DIscChannel* channelPtr = NULL; |
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153 |
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154 for ( TUint16 channel( KIscFirstChannel ) ; channel < KIscNumberOfUnits; channel++ ) |
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155 { |
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156 for ( TUint16 i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ ) |
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157 { |
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158 channelPtr = iIscChannels[channel][i]; |
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159 if ( channelPtr ) |
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160 { |
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161 channelPtr->EmptyBuffers(); |
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162 } |
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163 } |
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164 } |
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165 #ifdef __WINS__ |
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166 LeaveCriticalSection( &g_IscCriticalSection ); |
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167 #endif |
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168 |
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169 C_TRACE( ( _T( "IscChannelContainer::ChannelComplition - return 0x%x" ), KErrNone ) ); |
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170 |
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171 } |
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172 |
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173 // ----------------------------------------------------------------------------- |
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174 // IscChannelContainer::AddDfc |
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175 // Adds ChannelComplition Dfc |
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176 // ( other items were commented in a header ). |
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177 // ----------------------------------------------------------------------------- |
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178 // |
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179 void IscChannelContainer::AddDfc() |
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180 { |
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181 C_TRACE( ( _T( "IscChannelContainer::AddDfc()" ) ) ); |
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182 |
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183 if ( NKern::CurrentContext() == NKern::EInterrupt ) |
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184 { |
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185 iDfc->Add(); |
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186 } |
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187 else |
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188 { |
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189 iDfc->Enque(); |
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190 } |
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191 |
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192 } |
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193 |
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194 // ----------------------------------------------------------------------------- |
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195 // IscChannelContainer::Initialize |
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196 // Allocates Dfc function dynamically and formats data tables. |
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197 // ( other items were commented in a header ). |
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198 // ----------------------------------------------------------------------------- |
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199 // |
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200 void IscChannelContainer::Initialize() |
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201 { |
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202 C_TRACE( ( _T( "IscChannelContainer::Initialize()" ) ) ); |
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203 |
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204 if ( !iDfc ) |
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205 { |
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206 iDfc = new TDfc( IscChannelContainer::ChannelComplition, NULL, Kern::DfcQue0(), |
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207 KChannelComplitionDfcPriority ); |
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208 ASSERT_RESET_ALWAYS( iDfc, "IscDriver",EIscMemoryAllocationFailure ); |
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209 } |
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210 |
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211 for ( TUint16 channel( 0 ); channel < KIscNumberOfUnits; channel++ ) |
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212 { |
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213 for ( TUint16 i( 0 ); i < KIscMaxNumberOfChannelSharers; i++ ) |
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214 { |
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215 iIscChannels[channel][i] = NULL; |
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216 } |
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217 } |
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218 |
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219 #ifdef __WINS__ |
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220 InitializeCriticalSection( &g_IscCriticalSection ); |
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221 #endif |
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222 } |
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223 |
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224 // ----------------------------------------------------------------------------- |
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225 // IscChannelContainer::DeActivate |
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226 // Deallocates Dfc function |
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227 // ( other items were commented in a header ). |
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228 // ----------------------------------------------------------------------------- |
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229 // |
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230 void IscChannelContainer::DeActivate() |
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231 { |
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232 if ( iDfc ) |
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233 { |
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234 delete iDfc; |
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235 iDfc = NULL; |
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236 } |
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237 #ifdef __WINS__ |
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238 DeleteCriticalSection( &g_IscCriticalSection ); |
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239 #endif |
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240 |
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241 } |
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242 |
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243 // ----------------------------------------------------------------------------- |
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244 // IscChannelContainer::ValidateChannel |
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245 // |
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246 // (other items were commented in a header). |
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247 // ----------------------------------------------------------------------------- |
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248 // |
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249 TInt IscChannelContainer::ValidateChannel( |
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250 DIscChannel* aChannelPtr ) |
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251 { |
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252 C_TRACE( ( _T( "IscChannelContainer::ValidateChannel(0x%x)" ), aChannelPtr ) ); |
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253 TInt error( KErrNotFound ); |
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254 if( !aChannelPtr ) |
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255 { |
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256 C_TRACE( ( _T( "IscChannelContainer::ValidateChannel aChannelPtr was NULL" ) ) ); |
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257 error = KErrArgument; |
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258 } |
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259 else |
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260 { |
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261 for ( TUint16 channelNumber( 0 ); channelNumber < KIscNumberOfUnits ; channelNumber++ ) |
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262 { |
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263 for ( TInt i( KErrNone ); i < KIscMaxNumberOfChannelSharers ; i++ ) |
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264 { |
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265 if ( iIscChannels[channelNumber][i] == aChannelPtr ) |
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266 { |
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267 error = KErrNone; |
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268 break; |
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269 } |
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270 } |
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271 } |
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272 } |
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273 |
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274 C_TRACE( ( _T( "IscChannelContainer::ValidateChannel - return %d" ), error ) ); |
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275 return error; |
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276 |
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277 } |
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278 |
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279 // End of File |
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