1 /* |
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2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implementation of DIscBufferQueue class |
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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 <IscDefinitions.h> |
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23 #include "IscBufferQueue.h" |
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24 #include "IscQueue.h" |
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25 #include "IscTrace.h" |
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26 |
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27 #ifdef __WINS__ |
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28 #include <windows.h> |
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29 #endif |
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30 |
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31 // EXTERNAL DATA STRUCTURES |
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32 #ifdef __WINS__ |
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33 extern CRITICAL_SECTION g_IscDTBCriticalSection; |
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34 #endif |
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35 |
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36 // EXTERNAL FUNCTION PROTOTYPES |
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37 |
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38 // CONSTANTS |
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39 const TInt KIscInterruptLevelTwo( 2 ); |
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40 |
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41 // MACROS |
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42 |
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43 // LOCAL CONSTANTS AND MACROS |
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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 |
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51 // ============================ MEMBER FUNCTIONS =============================== |
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52 |
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53 // ----------------------------------------------------------------------------- |
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54 // DIscBufferQueue::DIscBufferQueue |
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55 // C++ default constructor can NOT contain any code, that |
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56 // might leave. |
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57 // ----------------------------------------------------------------------------- |
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58 // |
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59 DIscBufferQueue::DIscBufferQueue() |
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60 : iCount( NULL ), |
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61 iBuffers( NULL ), |
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62 iBuffersQueue( NULL ) |
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63 { |
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64 } |
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65 |
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66 |
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67 // ----------------------------------------------------------------------------- |
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68 // DIscBufferQueue::Construct |
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69 // Symbian 2nd phase constructor can leave. |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 TInt DIscBufferQueue::Construct( |
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73 TUint16 aSize, |
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74 TUint16 aCount, |
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75 TUint8* &aCurrentAddress ) |
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76 { |
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77 C_TRACE( ( _T( "DIscBufferQueue::Construct(0x%x, 0x%x, 0x%x) 0x%x, 0x%x" ), aSize, aCount, &aCurrentAddress, iBuffers, iBuffersQueue ) ); |
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78 |
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79 TInt r = KErrNone; |
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80 if ( aSize == 0 || aCount == 0 ) |
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81 return KErrArgument; |
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82 |
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83 iCount = aCount; |
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84 iBuffers = new TUint32*[aCount]; |
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85 ASSERT_RESET_ALWAYS( iBuffers, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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86 iBuffersQueue = new DIscQueue( iBuffers, aCount ); |
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87 ASSERT_RESET_ALWAYS( iBuffersQueue, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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88 |
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89 for ( TInt i = 0; i < aCount; i++ ) |
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90 { |
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91 TPtr8* pTmp; |
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92 #ifndef __WINS__ |
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93 pTmp = new TPtr8 ( ( TUint8* )aCurrentAddress, aSize ); |
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94 ASSERT_RESET_ALWAYS( pTmp, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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95 #else |
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96 TAny* ptr = Kern::Alloc( aSize ); |
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97 ASSERT_RESET_ALWAYS( ptr, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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98 pTmp = new TPtr8( ( TUint8* )ptr, 0, aSize ); |
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99 ASSERT_RESET_ALWAYS( pTmp, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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100 #endif // __WINS__ |
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101 |
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102 // Put the buffer into RX resource queue. |
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103 r = iBuffersQueue->Add( pTmp ); |
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104 |
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105 aCurrentAddress += aSize; |
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106 } |
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107 |
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108 C_TRACE( ( _T( "DIscBufferQueue::Construct - return 0x%x" ),r ) ); |
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109 |
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110 return r; |
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111 } |
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112 |
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113 |
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114 // ----------------------------------------------------------------------------- |
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115 // DIscBufferQueue::New |
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116 // Construct a new queue |
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117 // ( other items were commented in a header ). |
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118 // ----------------------------------------------------------------------------- |
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119 // |
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120 DIscBufferQueue* DIscBufferQueue::New( |
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121 TUint16 aSize, |
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122 TUint16 aCount, |
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123 TUint8*& aCurrentAddress ) |
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124 { |
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125 C_TRACE( ( _T( "DIscBufferQueue::New(0x%x, 0x%x, 0x%x)" ), aSize, aCount, aCurrentAddress) ); |
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126 |
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127 DIscBufferQueue* self = new DIscBufferQueue(); |
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128 ASSERT_RESET_ALWAYS( self, "ISCDataTransmissionBase",EIscMemoryAllocationFailure ); |
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129 if ( self->Construct( aSize, aCount, aCurrentAddress ) != KErrNone ) |
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130 { |
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131 delete self; |
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132 self = NULL; |
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133 } |
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134 else |
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135 { |
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136 } |
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137 |
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138 C_TRACE( ( _T( "DIscBufferQueue::New - return 0x%x" ),self ) ); |
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139 return self; |
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140 } |
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141 |
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142 |
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143 // ----------------------------------------------------------------------------- |
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144 // DIscBufferQueue::~DIscBufferQueue |
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145 // Destructor |
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146 // ( other items were commented in a header ). |
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147 // ----------------------------------------------------------------------------- |
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148 // |
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149 DIscBufferQueue::~DIscBufferQueue() |
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150 { |
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151 C_TRACE( ( _T( "DIscBufferQueue::~DIscBufferQueue()" ) ) ); |
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152 if ( iBuffersQueue ) |
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153 { |
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154 /* release all buffers */ |
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155 for ( TInt i = 0; i < iBuffersQueue->Count(); i++ ) |
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156 { |
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157 // destroy allocated buffer |
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158 TPtr8* delBuf = ( TPtr8* )iBuffersQueue->RemoveFirst(); |
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159 |
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160 if ( delBuf ) |
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161 { |
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162 #ifdef __WINS__ |
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163 Kern::Free( ( TAny* )delBuf->Ptr() ); |
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164 delete delBuf; |
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165 #else |
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166 delete delBuf; |
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167 #endif |
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168 } |
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169 else |
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170 { |
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171 } |
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172 } |
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173 delete iBuffersQueue; |
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174 delete []iBuffers; |
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175 } |
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176 C_TRACE( ( _T( "DIscBufferQueue::~DIscBufferQueue - return void" ) ) ); |
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177 } |
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178 |
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179 // ----------------------------------------------------------------------------- |
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180 // DIscBufferQueue::Reserve |
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181 // Reserves first element from the queue |
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182 // ( other items were commented in a header ). |
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183 // ----------------------------------------------------------------------------- |
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184 // |
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185 TDes8* DIscBufferQueue::Reserve() |
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186 { |
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187 |
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188 if ( iBuffersQueue ) |
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189 { |
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190 TDes8* temp = ( TDes8* )iBuffersQueue->RemoveFirst(); |
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191 if ( temp ) |
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192 { |
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193 TInt irqLevel = DisableIrqs(); |
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194 iCount--; |
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195 RestoreIrqs( irqLevel ); |
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196 } |
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197 return temp; |
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198 } |
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199 else |
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200 { |
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201 return NULL; |
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202 } |
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203 |
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204 } |
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205 |
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206 // ----------------------------------------------------------------------------- |
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207 // DIscBufferQueue::Release |
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208 // Releases element from the queue |
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209 // ( other items were commented in a header ). |
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210 // ----------------------------------------------------------------------------- |
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211 // |
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212 void DIscBufferQueue::Release( |
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213 TDes8* aPtr ) |
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214 { |
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215 |
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216 if ( iBuffersQueue ) |
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217 { |
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218 aPtr->Zero(); |
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219 TInt err = iBuffersQueue->Add( aPtr ); |
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220 ASSERT_RESET_ALWAYS( err == KErrNone, "ISCDataTransmissionBase",EIscBufferAllocationFailure ); |
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221 TInt irqLevel = DisableIrqs(); |
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222 iCount++; |
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223 RestoreIrqs( irqLevel ); |
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224 } |
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225 |
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226 } |
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227 |
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228 // ----------------------------------------------------------------------------- |
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229 // DIscBufferQueue::DisableIrqs |
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230 // Function to disable interrupts |
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231 // ( other items were commented in a header ). |
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232 // ----------------------------------------------------------------------------- |
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233 // |
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234 TInt DIscBufferQueue::DisableIrqs() |
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235 { |
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236 #ifndef __WINS__ |
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237 return NKern::DisableInterrupts( KIscInterruptLevelTwo ); |
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238 #else //__WINS__ |
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239 EnterCriticalSection( &g_IscDTBCriticalSection ); |
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240 return KErrNone; |
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241 #endif//__WINS__ |
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242 } |
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243 |
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244 // ----------------------------------------------------------------------------- |
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245 // DIscBufferQueue::RestoreIrqs |
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246 // Function to restore interrupts |
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247 // ( other items were commented in a header ). |
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248 // ----------------------------------------------------------------------------- |
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249 // |
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250 |
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251 #ifndef __WINS__ |
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252 void DIscBufferQueue::RestoreIrqs( |
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253 TInt aLevel ) |
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254 { |
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255 NKern::RestoreInterrupts( aLevel ); |
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256 #else //__WINS__ |
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257 void DIscBufferQueue::RestoreIrqs( |
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258 TInt ) |
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259 { |
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260 LeaveCriticalSection( &g_IscDTBCriticalSection ); |
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261 #endif//__WINS__ |
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262 } |
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263 // End of File |
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