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1 // Copyright (c) 1995-2009 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 the License "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 // e32\euser\epoc\up_utl.cpp |
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15 // |
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16 // |
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17 |
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18 #include <u32exec.h> |
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19 #include "up_std.h" |
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20 #include <e32svr.h> |
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21 #include <e32uid.h> |
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22 |
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23 #ifdef __EPOC32__ |
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24 #include <e32rom.h> |
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25 #endif |
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26 |
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27 #include <e32atomics.h> |
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28 |
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29 //#define __DEBUG_IMAGE__ 1 |
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30 #if defined(__DEBUG_IMAGE__) && defined (__EPOC32__) |
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31 extern RDebug debug; |
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32 #define __IF_DEBUG(t) {debug.t;} |
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33 #else |
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34 #define __IF_DEBUG(t) |
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35 #endif |
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36 |
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37 |
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38 /** |
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39 Atomically (i.e. in a manner which is safe against concurrent access by other |
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40 threads) increments a TInt value by 1. |
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41 |
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42 As an example of its use, the function is used in the implementation of |
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43 critical sections. |
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44 |
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45 @param aValue A reference to an integer whose value is to be incremented. |
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46 On return contains the incremented value. |
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47 |
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48 @return The value of aValue before it is incremented. |
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49 |
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50 @see User::LockedDec |
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51 @see RCrticalSection |
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52 */ |
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53 EXPORT_C TInt User::LockedInc(TInt& aValue) |
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54 { |
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55 return (TInt)__e32_atomic_add_ord32(&aValue, 1); |
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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 Atomically (i.e. in a manner which is safe against concurrent access by other |
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61 threads) decrements a TInt value by 1. |
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62 |
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63 As an example of its use, the function is used in the implementation of |
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64 critical sections. |
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65 |
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66 @param aValue A reference to an integer whose value is to be decremented. |
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67 On return contains the decremented value. |
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68 |
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69 @return The value of aValue before it is decremented. |
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70 |
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71 @see User::LockedInc |
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72 @see RCrticalSection |
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73 */ |
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74 EXPORT_C TInt User::LockedDec(TInt& aValue) |
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75 { |
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76 return (TInt)__e32_atomic_add_ord32(&aValue, 0xFFFFFFFF); |
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77 } |
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78 |
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79 |
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80 |
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81 |
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82 EXPORT_C TInt User::SafeInc(TInt& aValue) |
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83 /** |
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84 Atomically increments the specified value by 1, if the value is > 0. |
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85 |
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86 @param aValue The value to be incremented; on return the incremented value. |
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87 |
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88 @return The original value of aValue |
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89 */ |
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90 { |
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91 return __e32_atomic_tas_ord32(&aValue, 1, 1, 0); |
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92 } |
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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 EXPORT_C TInt User::SafeDec(TInt &aValue) |
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98 /** |
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99 Atomically decrements the specified value by 1, if the value is > 0. |
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100 |
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101 @param aValue The value to be decremented; on return the decremented value. |
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102 |
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103 @return The original value of aValue |
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104 */ |
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105 { |
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106 return __e32_atomic_tas_ord32(&aValue, 1, -1, 0); |
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107 } |
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108 |
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109 |
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110 EXPORT_C void UserSvr::WsRegisterThread() |
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111 // |
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112 // Register the window server thread. |
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113 // |
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114 { |
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115 |
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116 Exec::WsRegisterThread(); |
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117 } |
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118 |
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119 EXPORT_C void UserSvr::FsRegisterThread() |
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120 // |
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121 // Register the file server thread. |
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122 // |
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123 { |
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124 Exec::FsRegisterThread(); |
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125 } |
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126 |
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127 EXPORT_C void UserSvr::RegisterTrustedChunk(TInt aHandle) |
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128 /** |
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129 Registers file server's chunk intended for DMA transfer. |
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130 @internalComponent |
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131 @released |
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132 */ |
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133 { |
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134 Exec::RegisterTrustedChunk(aHandle); |
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135 } |
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136 |
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137 EXPORT_C TInt UserHeap::SetupThreadHeap(TBool, SStdEpocThreadCreateInfo& aInfo) |
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138 /** |
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139 @internalComponent |
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140 */ |
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141 { |
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142 TInt r = KErrNone; |
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143 if (!aInfo.iAllocator && aInfo.iHeapInitialSize>0) |
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144 { |
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145 // new heap required |
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146 RHeap* pH = NULL; |
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147 r = CreateThreadHeap(aInfo, pH); |
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148 } |
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149 else if (aInfo.iAllocator) |
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150 { |
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151 // sharing a heap |
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152 RAllocator* pA = aInfo.iAllocator; |
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153 pA->Open(); |
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154 User::SwitchAllocator(pA); |
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155 } |
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156 return r; |
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157 } |
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158 |
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159 |
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160 |
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161 |
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162 EXPORT_C void User::HandleException(TAny* aInfo) |
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163 /** |
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164 Enables the current thread to handle an exception. |
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165 |
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166 The function is called by the kernel. |
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167 |
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168 @param aInfo A pointer to a TExcType type containing the exception information. |
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169 |
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170 @see TExcType |
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171 */ |
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172 { |
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173 |
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174 const TUint32* p = (const TUint32*)aInfo; |
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175 TUint32 excType = p[0]; |
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176 TExceptionHandler f = Exec::ExceptionHandler(KCurrentThreadHandle); |
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177 TRAPD(r, (*f)(TExcType(excType)) ); |
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178 Exec::ThreadSetFlags(KCurrentThreadHandle,KThreadFlagLastChance,0); |
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179 if (r!=KErrNone) |
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180 User::Leave(r); |
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181 } |
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182 |
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183 |
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184 |
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185 |
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186 #ifdef __EPOC32__ |
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187 EXPORT_C TInt User::IsRomAddress(TBool &aBool, TAny *aPtr) |
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188 /** |
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189 Tests whether the specified address is in the ROM. |
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190 |
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191 @param aBool True, if the address at aPtr is within the ROM; false, |
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192 otherwise. |
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193 @param aPtr The address to be tested. |
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194 |
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195 @return Always KErrNone. |
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196 */ |
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197 { |
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198 |
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199 TUint a = (TUint)aPtr; |
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200 TUint main_start = UserSvr::RomHeaderAddress(); |
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201 TUint main_end = main_start + ((TRomHeader*)main_start)->iUncompressedSize; |
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202 aBool = (a>=main_start && a<main_end); |
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203 if (aBool) |
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204 return KErrNone; // address is in main ROM |
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205 |
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206 TUint rda = UserSvr::RomRootDirectoryAddress(); |
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207 |
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208 // We assume here, the primary rom starts a multiple of 4k. |
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209 if (rda > main_end) |
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210 { |
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211 // ASSUMPTIONS HERE |
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212 // 1. root directory is past the end of the main ROM so there must be an extension ROM |
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213 // 2. the ROM file system in the extension ROM is at the beginning of the ROM (similar to the |
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214 // main ROM) |
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215 // 3. the extension ROM is mapped starting at a megabyte boundary |
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216 // Thus the address of the extension ROM header may be obtained by rounding the root directory |
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217 // address down to the next megabyte boundary. |
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218 |
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219 TUint ext_start = rda &~ 0x000fffffu; |
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220 TUint ext_base = ((TExtensionRomHeader*)ext_start)->iRomBase; |
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221 TUint ext_end = ext_start + ((TExtensionRomHeader*)ext_start)->iUncompressedSize; |
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222 aBool = (ext_base==ext_start && a>=ext_start && a<ext_end); |
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223 } return KErrNone; |
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224 } |
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225 #endif |
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226 |
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227 |
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228 #ifdef __MARM__ |
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229 EXPORT_C void E32Loader::GetV7StubAddresses(TLinAddr& aExe, TLinAddr& aDll) |
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230 { |
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231 // Only need V7 support on ARM platforms |
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232 aExe = (TLinAddr)&E32Loader::V7ExeEntryStub; |
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233 aDll = (TLinAddr)&E32Loader::V7DllEntryStub; |
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234 } |
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235 #endif |
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236 |
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237 #ifdef __MARM__ |
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238 // Only need V7 support on ARM platforms |
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239 |
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240 _LIT(KEka1EntryStubName, "eka1_entry_stub.dll"); |
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241 extern "C" TLinAddr GetEka1ExeEntryPoint() |
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242 { |
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243 TLinAddr a = 0; |
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244 RLibrary l; |
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245 TInt r = l.Load(KEka1EntryStubName, KNullDesC, TUidType(KDynamicLibraryUid, KEka1EntryStubUid)); |
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246 if (r == KErrNone) |
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247 r = l.Duplicate(RThread(), EOwnerProcess); |
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248 if (r == KErrNone) |
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249 { |
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250 a = (TLinAddr)l.Lookup(1); |
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251 if (!a) |
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252 r = KErrNotSupported; |
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253 } |
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254 if (r != KErrNone) |
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255 RThread().Kill(r); |
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256 Exec::SetReentryPoint(a); |
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257 return a; |
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258 } |
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259 #endif |