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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @internalComponent |
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19 */ |
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20 |
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21 #include <bluetooth/logger.h> |
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22 #include "CBnepLink.h" |
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23 #include "CSocketWriter.h" |
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24 #include "bneputils.h" |
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25 |
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26 #ifdef __FLOG_ACTIVE |
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27 _LIT8(KLogComponent, LOG_COMPONENT_PAN_BNEP); |
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28 #endif |
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29 |
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30 CSocketWriter::CSocketWriter (RInternalSocket& aSocket, CBnepLink& aOwner) |
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31 : CActive(EPriorityHigh), iSocket(aSocket), iBnepLink(aOwner) |
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32 { |
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33 LOG_FUNC |
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34 CActiveScheduler::Add(this); |
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35 } |
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36 |
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37 /** |
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38 Cancels any pending writes. |
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39 @internalComponent |
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40 */ |
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41 CSocketWriter::~CSocketWriter() |
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42 { |
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43 LOG_FUNC |
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44 Cancel(); |
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45 |
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46 iPendingWriteData.Free(); |
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47 } |
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48 |
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49 /** |
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50 Create the socket writer |
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51 @internalComponent |
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52 */ |
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53 CSocketWriter* CSocketWriter::NewL (RInternalSocket& aSocket, CBnepLink& aOwner) |
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54 { |
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55 LOG_STATIC_FUNC |
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56 CSocketWriter* self = new(ELeave) CSocketWriter(aSocket, aOwner); |
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57 CleanupStack::PushL(self); |
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58 self->ConstructL(); |
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59 CleanupStack::Pop(self); |
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60 return self; |
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61 } |
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62 |
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63 /** |
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64 Attempt to write a buffer. |
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65 @return KErrNone if successful or a system-wide error code |
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66 @internalComponent |
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67 */ |
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68 TInt CSocketWriter::Write (RMBufChain& aChain) |
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69 { |
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70 LOG_FUNC |
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71 if (aChain.Length() > KBnepMTU) |
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72 { |
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73 LOG(_L8("Length greater than expected MTU!")); |
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74 aChain.Free(); |
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75 return KErrTooBig; |
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76 } |
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77 if (IsActive()) |
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78 { |
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79 if(iQueueSize < KMaxSocketWriterQueueSize) |
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80 { |
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81 iQueue.Append(aChain); |
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82 iQueueSize++; |
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83 return KErrNone; |
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84 } |
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85 else |
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86 { |
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87 LOG(_L8("Bnep::ESocketWriterQueueOverflow")); |
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88 aChain.Free(); |
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89 return KErrOverflow; |
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90 } |
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91 } |
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92 LOG1(_L8("Length %d"), aChain.Length()); |
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93 |
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94 __ASSERT_DEBUG(iPendingWriteData.IsEmpty(), BnepUtils::Panic(Bnep::ESocketWriterQueueOverflow)); |
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95 iPendingWriteData.Assign(aChain); |
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96 iSocket.Write(iPendingWriteData, iStatus); |
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97 |
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98 SetActive(); |
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99 return KErrNone; |
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100 } |
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101 |
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102 /** |
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103 Does nothing |
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104 @internalComponent |
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105 */ |
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106 void CSocketWriter::ConstructL () |
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107 { |
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108 LOG_FUNC |
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109 } |
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110 |
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111 /** |
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112 Checks iQueue for outstanding buffers and writes the first |
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113 if it exists. |
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114 @internalComponent |
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115 */ |
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116 void CSocketWriter::RunL () |
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117 { |
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118 LOG_FUNC |
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119 // Check if the completed write was a success. |
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120 if(iStatus.Int() != KErrNone) |
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121 { |
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122 // The write failed - clear the pending write data. |
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123 LOG1(_L8("CSocketWriter::RunL completed with error: %d"), iStatus.Int()); |
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124 iPendingWriteData.Free(); |
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125 } |
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126 |
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127 __ASSERT_DEBUG(iPendingWriteData.IsEmpty(), BnepUtils::Panic(Bnep::ESocketWriterQueueOverflow)); |
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128 |
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129 if(!iQueue.IsEmpty()) |
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130 { |
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131 RMBufChain item; |
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132 //Check on return value of iQueue.Remove() is unnecessary, since we've checked iQueue.IsEmpty() |
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133 static_cast<void>(iQueue.Remove(item)); |
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134 iQueueSize--; |
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135 Write(item); |
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136 } |
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137 else |
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138 { |
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139 iQueueSize = 0; // To make sure that we are always in sync |
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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 Cancel write. |
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145 @internalComponent |
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146 */ |
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147 void CSocketWriter::DoCancel () |
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148 { |
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149 LOG_FUNC |
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150 iSocket.CancelWrite(); |
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151 |
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152 // Free the pending data buffer to aviod asserting when the next Write operation |
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153 // is performed. |
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154 |
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155 iPendingWriteData.Free(); |
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156 } |