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1 /* |
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2 * Copyright (c) 2009 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 the License "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 RWlanCircularBuffer inline methods. |
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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 * %version: 2 % |
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20 */ |
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21 |
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22 #include <kernel.h> // for Kern::SystemTime() |
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23 |
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24 // ----------------------------------------------------------------------------- |
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25 // |
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26 // ----------------------------------------------------------------------------- |
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27 // |
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28 template <TUint size> |
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29 inline void RWlanCircularBuffer<size>::DoInit() |
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30 { |
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31 iSize = size; |
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32 iPacketAmount = 0; |
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33 iGetIndex = 0; |
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34 iPutIndex = 0; |
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35 iBecameEmptyAt = 0; |
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36 } |
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37 |
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38 // ----------------------------------------------------------------------------- |
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39 // |
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40 // ----------------------------------------------------------------------------- |
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41 // |
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42 template <TUint size> |
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43 inline void RWlanCircularBuffer<size>::Release() |
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44 { |
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45 // Do nothing |
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46 } |
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47 |
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48 // ----------------------------------------------------------------------------- |
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49 // |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 template <TUint size> |
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53 inline TBool RWlanCircularBuffer<size>::IsEmpty() const |
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54 { |
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55 return iPacketAmount == 0 ? ETrue : EFalse; |
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56 } |
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57 |
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58 // ----------------------------------------------------------------------------- |
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59 // |
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60 // ----------------------------------------------------------------------------- |
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61 // |
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62 template <TUint size> |
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63 inline TBool RWlanCircularBuffer<size>::IsFull() const |
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64 { |
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65 return iPacketAmount == iSize ? ETrue : EFalse; |
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66 } |
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67 |
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68 // ----------------------------------------------------------------------------- |
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69 // |
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70 // ----------------------------------------------------------------------------- |
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71 // |
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72 template <TUint size> |
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73 inline TDataBuffer* RWlanCircularBuffer<size>::GetPacket() |
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74 { |
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75 TDataBuffer* packet = NULL; |
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76 |
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77 if ( !IsEmpty() ) |
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78 { |
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79 packet = iBuffer[iGetIndex]; |
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80 |
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81 if ( ++iGetIndex == iSize ) |
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82 { |
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83 iGetIndex = 0; |
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84 } |
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85 |
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86 if ( --iPacketAmount == 0 ) |
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87 { |
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88 iBecameEmptyAt = Kern::SystemTime(); |
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89 } |
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90 } |
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91 |
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92 return packet; |
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93 } |
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94 |
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95 // ----------------------------------------------------------------------------- |
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96 // |
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97 // ----------------------------------------------------------------------------- |
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98 // |
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99 template <TUint size> |
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100 inline TBool RWlanCircularBuffer<size>::PutPacket( TDataBuffer* aPacket ) |
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101 { |
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102 TBool ret( EFalse ); |
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103 |
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104 if ( !IsFull() ) |
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105 { |
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106 iBuffer[iPutIndex] = aPacket; |
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107 |
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108 if ( ++iPutIndex == iSize ) |
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109 { |
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110 iPutIndex = 0; |
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111 } |
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112 |
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113 ++iPacketAmount; |
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114 ret = ETrue; |
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115 } |
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116 |
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117 return ret; |
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118 } |
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119 |
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120 // ----------------------------------------------------------------------------- |
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121 // |
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122 // ----------------------------------------------------------------------------- |
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123 // |
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124 template <TUint size> |
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125 inline TDataBuffer* RWlanCircularBuffer<size>::PeekPacket() |
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126 { |
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127 TDataBuffer* packet = NULL; |
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128 |
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129 if ( !IsEmpty() ) |
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130 { |
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131 packet = iBuffer[iGetIndex]; |
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132 } |
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133 |
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134 return packet; |
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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 // ----------------------------------------------------------------------------- |
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140 // |
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141 template <TUint size> |
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142 inline TUint RWlanCircularBuffer<size>::GetLength() const |
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143 { |
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144 return iPacketAmount; |
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145 } |
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146 |
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147 // ----------------------------------------------------------------------------- |
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148 // |
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149 // ----------------------------------------------------------------------------- |
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150 // |
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151 template <TUint size> |
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152 inline TBool RWlanCircularBuffer<size>::IsActive( TInt64 aTimeNow ) const |
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153 { |
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154 const TInt64 KActivityThreshold ( 25000 ); // microseconds |
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155 |
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156 if ( !IsEmpty() ) |
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157 { |
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158 return ETrue; |
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159 } |
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160 else |
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161 { |
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162 if ( aTimeNow - iBecameEmptyAt > KActivityThreshold ) |
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163 { |
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164 return EFalse; |
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165 } |
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166 else |
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167 { |
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168 return ETrue; |
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169 } |
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170 } |
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171 } |