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1 /* |
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2 * Copyright (c) 2002-2003 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 "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: |
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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 #ifndef __E32PROPERTY_H__ |
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20 #define __E32PROPERTY_H__ |
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21 |
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22 #include <e32cmn.h> |
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23 |
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24 /** |
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25 @publishedAll |
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26 @released |
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27 |
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28 Property category UID value reserved for System services. |
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29 */ |
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30 static const TInt32 KUidSystemCategoryValue=0x101f75b6; |
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31 |
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32 |
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33 /** |
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34 @publishedAll |
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35 @released |
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36 |
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37 Property category UID reserved for System services |
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38 */ |
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39 static const TUid KUidSystemCategory={KUidSystemCategoryValue}; |
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40 |
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41 |
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42 /** |
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43 @publishedAll |
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44 @released |
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45 |
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46 The lowest value for Property categories at which additional |
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47 security restrictions are applied when defining properties. |
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48 |
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49 Properties with category values above this threshold may only be defined |
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50 if the category matches the defining process's Secure ID. |
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51 |
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52 Below this threashold, properties may be defined either by processes with |
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53 a matching Secure ID, or by processes with the WriteDeviceData capability. |
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54 */ |
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55 static const TInt32 KUidSecurityThresholdCategoryValue=0x10273357; |
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56 |
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57 |
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58 /** |
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59 @publishedAll |
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60 @released |
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61 |
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62 User side interface to Publish & Subscribe. |
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63 |
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64 The class defines a handle to a property, a single data value representing |
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65 an item of state information. Threads can publish (change) a property value |
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66 through this handle. Threads can also subscribe |
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67 (request notification of changes) to a property value through this handle; |
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68 they can also retrieve the current property value. |
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69 */ |
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70 class RProperty : public RHandleBase |
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71 { |
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72 public: |
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73 /** |
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74 The largest supported property value, in bytes, for byte-array (binary) |
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75 types and text types. |
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76 */ |
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77 enum { KMaxPropertySize = 512 }; |
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78 /** |
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79 The largest supported property value, in bytes, for large byte-array (binary) |
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80 types and large text types. |
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81 */ |
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82 enum { KMaxLargePropertySize = 65535 }; |
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83 |
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84 |
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85 /** |
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86 Property type attribute. |
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87 */ |
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88 enum TType |
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89 { |
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90 /** |
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91 Integral property type. |
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92 */ |
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93 EInt, |
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94 |
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95 |
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96 /** |
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97 Byte-array (binary data) property type. |
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98 This type provides real-time guarantees but is limited to a maximum size |
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99 of 512 bytes. |
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100 |
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101 @see KMaxPropertySize |
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102 */ |
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103 EByteArray, |
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104 |
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105 |
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106 /** |
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107 Text property type. |
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108 This is just a programmer friendly view of a byte-array property, and |
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109 is implemented in the same way as EByteArray. |
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110 */ |
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111 EText = EByteArray, |
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112 |
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113 |
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114 /** |
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115 Large byte-array (binary data) property type. |
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116 This type provides no real-time guarantees but supports properties |
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117 of up to 65536 bytes. |
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118 |
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119 @see KMaxLargePropertySize |
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120 */ |
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121 ELargeByteArray, |
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122 |
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123 |
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124 /** |
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125 Large text property type. |
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126 This is just a programmer friendly view of a byte-array property, and |
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127 is implemented in the same way as EByteArray. |
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128 */ |
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129 ELargeText = ELargeByteArray, |
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130 |
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131 |
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132 /** |
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133 Upper limit for TType values. |
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134 It is the maximal legal TType value plus 1. |
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135 */ |
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136 ETypeLimit, |
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137 |
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138 |
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139 /** |
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140 Bitmask for TType values coded within TInt attributes. |
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141 */ |
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142 ETypeMask = 0xff |
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143 }; |
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144 |
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145 |
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146 public: |
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147 IMPORT_C static TInt Define(TUid aCategory, TUint aKey, TInt aAttr, TInt aPreallocate=0); |
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148 IMPORT_C static TInt Define(TUid aCategory, TUint aKey, TInt aAttr, const TSecurityPolicy& aReadPolicy, const TSecurityPolicy& aWritePolicy, TInt aPreallocated=0); |
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149 IMPORT_C static TInt Define(TUint aKey, TInt aAttr, const TSecurityPolicy& aReadPolicy, const TSecurityPolicy& aWritePolicy, TInt aPreallocated=0); |
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150 IMPORT_C static TInt Delete(TUid aCategory, TUint aKey); |
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151 IMPORT_C static TInt Delete(TUint aKey); |
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152 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TInt& aValue); |
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153 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TDes8& aValue); |
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154 #ifndef __KERNEL_MODE__ |
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155 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TDes16& aValue); |
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156 #endif |
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157 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, TInt aValue); |
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158 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, const TDesC8& aValue); |
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159 #ifndef __KERNEL_MODE__ |
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160 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, const TDesC16& aValue); |
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161 #endif |
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162 |
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163 IMPORT_C TInt Attach(TUid aCategory, TUint aKey, TOwnerType aType = EOwnerProcess); |
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164 |
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165 IMPORT_C void Subscribe(TRequestStatus& aRequest); |
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166 IMPORT_C void Cancel(); |
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167 |
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168 IMPORT_C TInt Get(TInt& aValue); |
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169 IMPORT_C TInt Get(TDes8& aValue); |
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170 #ifndef __KERNEL_MODE__ |
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171 IMPORT_C TInt Get(TDes16& aValue); |
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172 #endif |
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173 IMPORT_C TInt Set(TInt aValue); |
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174 IMPORT_C TInt Set(const TDesC8& aValue); |
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175 #ifndef __KERNEL_MODE__ |
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176 IMPORT_C TInt Set(const TDesC16& aValue); |
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177 #endif |
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178 }; |
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179 |
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180 #endif |