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1 // Copyright (c) 1997-2009 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 // Buffer Manager for Protocols(Buffer) |
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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 @file |
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20 @internalComponent |
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21 */ |
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22 |
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23 #include <es_mbman.h> |
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24 |
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25 #include "MBufPoolChain.h" |
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26 #include "MBufPoolManager.h" |
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27 |
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28 // |
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29 // MBUF |
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30 // |
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31 |
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32 |
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33 TAny *RMBuf::operator new(TUint /*aSize*/, RMBuf* aPtr) |
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34 /** |
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35 Provide MBuf with a new in-place operator |
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36 */ |
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37 { |
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38 __ASSERT_DEBUG(aPtr, CMBufManager::Panic(EMBuf_BadNewInPlace)); |
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39 return aPtr; |
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40 } |
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41 |
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42 |
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43 void RMBuf::operator delete(TAny* /*aPtr*/) |
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44 /** |
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45 In place delete |
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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 void RMBuf::operator delete(TAny* /*aPtr*/, RMBuf*) |
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52 /** |
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53 extra delete operator for exception unwinding in Code Warrior |
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54 */ |
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55 { |
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56 } |
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57 |
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58 |
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59 RMBuf::RMBuf(TUint8* aBuffer, RMBufPoolChain* aPoolChain, TInt aSize) |
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60 : iBuffer(aBuffer), iSize(aSize), iPoolChain(aPoolChain) |
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61 /** |
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62 MBuf constructor initialiser |
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63 @param aBuffer A buffer |
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64 @param aPoolChain The poolchain that contains the MBuf |
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65 @param aSize Size |
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66 */ |
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67 { |
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68 Init(EMBufFree); |
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69 } |
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70 |
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71 |
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72 EXPORT_C void RMBuf::Init(TMBufType aType) |
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73 /** |
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74 Initialises MBuf's members |
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75 @param aType A MBuf type |
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76 */ |
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77 { |
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78 iType = aType; |
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79 iLength = iSize; |
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80 iOffset = 0; |
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81 iNext = NULL; |
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82 iRefCount = 0; |
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83 iNextPkt.Init(); |
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84 } |
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85 |
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86 |
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87 // allocates memory for a RMBuf object, return a pointer to the RMBuf object memory |
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88 // - the size of the mbuf to be allocatd will depend on the available pool chains, eg. 128, 1514, 9000, etc |
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89 EXPORT_C RMBuf* RMBuf::AllocL() |
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90 { |
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91 return CMBufManager::Context()->AllocL(KMBufSmallSize); // default size is specified within CMufManager implementation, guaranteed to be only 1 mbuf |
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92 } |
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93 EXPORT_C RMBuf* RMBuf::AllocL(TUint aSize) |
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94 { |
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95 RMBuf* mBuf = CMBufManager::Context()->Alloc(aSize, aSize); // min. size constraint to ensure only 1 mbuf is allocated |
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96 if (!mBuf) |
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97 { |
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98 User::Leave(KErrNoMBufs); |
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99 } |
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100 return mBuf; |
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101 } |
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102 EXPORT_C RMBuf* RMBuf::Alloc() |
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103 { |
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104 return CMBufManager::Context()->Alloc(KMBufSmallSize); // default size is specified within CMufManager implementation, guaranteed to be only 1 mbuf |
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105 } |
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106 EXPORT_C RMBuf* RMBuf::Alloc(TUint aSize) |
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107 { |
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108 return CMBufManager::Context()->Alloc(aSize, aSize); // min. size constraint to ensure only 1 mbuf is allocated |
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109 } |
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110 |
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111 // overloading for TLS |
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112 EXPORT_C RMBuf* RMBuf::AllocL(RMBufAllocator& aRMBufAllocator) |
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113 { |
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114 return aRMBufAllocator.MBufManager().AllocL(KMBufSmallSize); // default size is specified within CMufManager implementation, guaranteed to be only 1 mbuf |
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115 } |
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116 EXPORT_C RMBuf* RMBuf::AllocL(TUint aSize, RMBufAllocator& aRMBufAllocator) |
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117 { |
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118 RMBuf *mBuf = aRMBufAllocator.MBufManager().Alloc(aSize, aSize); // min. size constraint to ensure only 1 mbuf is allocated |
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119 if (!mBuf) |
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120 { |
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121 User::Leave(KErrNoMBufs); |
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122 } |
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123 return mBuf; |
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124 } |
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125 EXPORT_C RMBuf* RMBuf::Alloc(RMBufAllocator& aRMBufAllocator) |
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126 { |
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127 return aRMBufAllocator.MBufManager().Alloc(KMBufSmallSize); // default size is specified within CMufManager implementation, guaranteed to be only 1 mbuf |
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128 } |
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129 EXPORT_C RMBuf* RMBuf::Alloc(TUint aSize, RMBufAllocator& aRMBufAllocator) |
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130 { |
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131 return aRMBufAllocator.MBufManager().Alloc(aSize, aSize); // min. size constraint to ensure only 1 mbuf is allocated |
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132 } |
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133 |
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134 EXPORT_C void RMBuf::Free() |
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135 /** |
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136 Frees the allocated memory for the RMBuf object |
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137 */ |
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138 { |
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139 |
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140 // There is currently no support for reference counting, this check is to |
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141 // ensure that someone hasn't mistakenly tried to use the iRefCount member. |
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142 // The iRefCount member was introduced to allow reference counting to be |
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143 // implemented at a later without another BC break having to be raised. |
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144 __ASSERT_DEBUG(iRefCount==0, CMBufManager::Panic(EMBuf_InvalidRefCount)); |
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145 __ASSERT_DEBUG(iPoolChain != NULL, CMBufManager::Panic(EMBuf_NoPoolChain)); |
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146 ((RMBufPoolChain*)iPoolChain)->MBufPoolManager().Free(this, EFalse); |
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147 } |
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148 |
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149 |
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150 EXPORT_C RMBuf* RMBuf::Last() |
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151 /** |
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152 Last MBuf in a chain. |
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153 Not really supposed to be in RMBuf, |
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154 but putting it here allows the code to |
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155 be shared by RMBufChain and RMBufQ |
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156 @return A pointer to the last MBuf in the chain |
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157 */ |
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158 { |
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159 RMBuf* p = NULL; |
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160 TMBufIter m(this); |
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161 |
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162 while (m.More()) |
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163 { |
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164 p = m; |
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165 m++; |
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166 } |
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167 return p; |
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168 } |
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169 |
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170 EXPORT_C void RMBuf::__DbgPut(TUint8 aVal, TInt aOffset) |
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171 { |
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172 __ASSERT_ALWAYS(aOffset<(iOffset+iLength), CMBufManager::Panic(EMBuf_BadOffset)); |
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173 *(Ptr()+aOffset) = aVal; |
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174 } |
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175 |
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176 EXPORT_C TUint8 RMBuf::__DbgGet(TInt aOffset) const |
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177 { |
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178 __ASSERT_ALWAYS(aOffset<(iOffset+iLength), CMBufManager::Panic(EMBuf_BadOffset)); |
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179 return *(Ptr()+aOffset); |
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180 } |