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1 // Copyright (c) 2003-2009 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 // Defines the avdtp allocators |
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15 // These classes help track values that are selected from a pool |
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16 // The values are released as R-classes to reflect the "resource ownership" |
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17 // that is conferred upon the owner. |
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18 // |
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19 // |
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20 |
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21 /** |
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22 @file |
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23 @internalComponent |
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24 */ |
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25 |
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26 |
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27 #ifndef _AVDTPALLOCATORS_H |
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28 #define _AVDTPALLOCATORS_H |
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29 |
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30 #include <bluetoothav.h> |
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31 #include "gavdpinterface.h" |
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32 |
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33 NONSHARABLE_CLASS(TBitFieldAllocator) |
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34 /* |
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35 abstract base for types that need to use a bit field to handle their values |
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36 */ |
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37 { |
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38 friend class RTrackedValue; |
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39 protected: |
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40 inline TBitFieldAllocator() : iBitField(0) {}; |
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41 TInt Get(TInt& aResult, TInt aMax, TInt aMin=0); |
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42 void Free(TInt aVal); |
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43 protected: |
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44 TUint64 iBitField; |
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45 TInt iMin; |
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46 }; |
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47 |
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48 |
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49 NONSHARABLE_CLASS(RTrackedValue) |
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50 { |
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51 public: |
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52 inline void Close(); |
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53 inline void Acquire(RTrackedValue& aTrackedValue); // this takes ownership |
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54 protected: |
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55 inline RTrackedValue(); |
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56 inline void Set(TBitFieldAllocator& aAllocator, TUint32 aValue); |
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57 protected: |
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58 TBitFieldAllocator* iAllocator; //non-owned |
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59 TUint32 iValue; |
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60 private: |
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61 RTrackedValue(const RTrackedValue&); // forbid copying |
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62 RTrackedValue& operator=(const RTrackedValue&); |
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63 }; |
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64 |
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65 inline RTrackedValue::RTrackedValue() |
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66 : iAllocator(NULL), iValue(0) |
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67 { |
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68 } |
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69 |
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70 inline void RTrackedValue::Set(TBitFieldAllocator& aAllocator, TUint32 aValue) |
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71 { |
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72 iAllocator=&aAllocator; |
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73 iValue=aValue; |
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74 } |
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75 |
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76 inline void RTrackedValue::Close() |
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77 { |
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78 if (iAllocator) |
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79 { |
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80 iAllocator->Free(iValue); |
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81 } |
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82 } |
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83 |
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84 inline void RTrackedValue::Acquire(RTrackedValue& aValue) |
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85 { |
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86 Set(*aValue.iAllocator, aValue.iValue); |
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87 // to transfer ownership: |
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88 new (&aValue) RTrackedValue; |
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89 } |
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90 |
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91 NONSHARABLE_CLASS(RAvdtpTransactionLabel) : public RTrackedValue |
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92 { |
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93 friend class TTransactionLabelManager; |
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94 public: |
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95 inline TAvdtpTransactionLabel TransactionLabel() const; |
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96 }; |
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97 |
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98 NONSHARABLE_CLASS(RTSID) : public RTrackedValue |
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99 { |
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100 friend class TTSIDManager; |
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101 public: |
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102 inline TTSID TSID() const; |
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103 }; |
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104 |
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105 NONSHARABLE_CLASS(RTCID) : public RTrackedValue |
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106 { |
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107 friend class TTCIDManager; |
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108 public: |
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109 inline TTCID TCID() const; |
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110 }; |
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111 |
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112 NONSHARABLE_CLASS(RSEID) : public RTrackedValue |
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113 { |
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114 friend class TSEIDManager; |
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115 public: |
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116 inline TSEID SEID() const; |
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117 }; |
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118 |
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119 inline TAvdtpTransactionLabel RAvdtpTransactionLabel::TransactionLabel() const |
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120 { |
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121 return static_cast<TAvdtpTransactionLabel>(iValue); |
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122 } |
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123 |
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124 inline TTCID RTCID::TCID() const |
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125 { |
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126 return static_cast<TTCID>(iValue); |
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127 } |
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128 |
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129 inline TTSID RTSID::TSID() const |
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130 { |
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131 return static_cast<TTSID>(iValue); |
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132 } |
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133 |
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134 inline TSEID RSEID::SEID() const |
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135 { |
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136 return static_cast<TSEID>(iValue); |
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137 } |
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138 |
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139 NONSHARABLE_CLASS(TTransactionLabelManager) : public TBitFieldAllocator |
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140 { |
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141 public: |
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142 inline TInt GetLabel(RAvdtpTransactionLabel& aLabel); |
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143 }; |
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144 |
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145 |
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146 NONSHARABLE_CLASS(TTCIDManager) : public TBitFieldAllocator |
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147 { |
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148 public: |
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149 inline TInt GetTCID(RTCID& aTCID); |
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150 inline TInt GrabTCID(RTCID& aTCID, TTCID aAssignedTCID); |
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151 }; |
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152 |
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153 NONSHARABLE_CLASS(TTSIDManager) : public TBitFieldAllocator |
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154 { |
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155 public: |
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156 inline TInt GetTSID(RTSID& aTSID); |
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157 }; |
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158 |
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159 NONSHARABLE_CLASS(TSEIDManager) : public TBitFieldAllocator |
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160 { |
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161 public: |
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162 inline TInt GetSEID(RSEID& aSEID); |
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163 }; |
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164 |
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165 inline TInt TTransactionLabelManager::GetLabel(RAvdtpTransactionLabel& aLabel) |
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166 { |
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167 TInt val, res; |
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168 res = Get(val, KMaxTUint5); |
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169 if (res==KErrNone) |
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170 { |
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171 aLabel.Set(*this, val); |
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172 } |
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173 return res; |
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174 } |
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175 |
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176 inline TInt TTCIDManager::GetTCID(RTCID& aTCID) |
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177 { |
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178 TInt val, res; |
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179 res = Get(val, KMaxTUint5-1, KMinimumRealTCID); // cannot use top bit as RFD in spec |
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180 if (res==KErrNone) |
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181 { |
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182 aTCID.Set(*this, val); |
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183 } |
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184 return res; |
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185 } |
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186 |
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187 inline TInt TTCIDManager::GrabTCID(RTCID& aTCID, TTCID aAssignedTCID) |
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188 { |
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189 // during muxing the remote can "assign" a TCID from our pool |
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190 // if things are going ok with remote it should be a free TCID |
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191 // but the return allows for an error just in case |
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192 // constrain the range to reuse case-class code :o) |
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193 TInt val, res; |
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194 res = Get(val, aAssignedTCID, aAssignedTCID); |
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195 if (res==KErrNone) |
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196 { |
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197 aTCID.Set(*this, val); |
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198 } |
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199 return res; |
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200 } |
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201 |
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202 inline TInt TTSIDManager::GetTSID(RTSID& aTSID) |
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203 { |
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204 TInt val, res; |
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205 res = Get(val, KMaxTUint5-1, KMinimumRealTSID); // cannot use top bit as RFD in spec |
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206 if (res==KErrNone) |
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207 { |
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208 aTSID.Set(*this, val); |
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209 } |
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210 return res; |
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211 } |
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212 |
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213 inline TInt TSEIDManager::GetSEID(RSEID& aSEID) |
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214 { |
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215 TInt val, res; |
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216 // to make agnostic to implementation of local/remote seids |
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217 // remembering this only allocates semantically local seids... |
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218 TSEID min(KMinimumRealSEID, ETrue); |
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219 TSEID max(KMaxTUint6-1, ETrue); // 0x3f is RFD, see 8.18 |
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220 __ASSERT_COMPILE(KMinimumRealSEID<KMaxTUint6); |
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221 res = Get(val, max.Value(), min.Value()); |
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222 if (res==KErrNone) |
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223 { |
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224 aSEID.Set(*this, val); |
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225 } |
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226 return res; |
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227 } |
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228 |
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229 #endif //_AVDTPALLOCATORS_H |