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1 // Copyright (c) 2002-2009 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\include\e32property.h |
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15 // |
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16 // |
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17 |
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18 #ifndef __E32PROPERTY_H__ |
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19 #define __E32PROPERTY_H__ |
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20 |
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21 #include <e32cmn.h> |
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22 |
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23 /** |
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24 @publishedAll |
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25 @released |
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26 |
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27 Property category UID value reserved for System services. |
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28 */ |
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29 static const TInt32 KUidSystemCategoryValue=0x101f75b6; |
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30 |
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31 |
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32 /** |
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33 @publishedAll |
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34 @released |
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35 |
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36 Property category UID reserved for System services |
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37 */ |
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38 static const TUid KUidSystemCategory={KUidSystemCategoryValue}; |
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39 |
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40 |
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41 /** |
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42 @publishedAll |
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43 @released |
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44 |
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45 The lowest value for Property categories at which additional |
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46 security restrictions are applied when defining properties. |
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47 |
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48 Properties with category values above this threshold may only be defined |
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49 if the category matches the defining process's Secure ID. |
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50 |
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51 Below this threashold, properties may be defined either by processes with |
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52 a matching Secure ID, or by processes with the WriteDeviceData capability. |
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53 */ |
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54 static const TInt32 KUidSecurityThresholdCategoryValue=0x10273357; |
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55 |
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56 |
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57 /** |
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58 @publishedAll |
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59 @released |
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60 |
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61 User side interface to Publish & Subscribe. |
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62 |
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63 The class defines a handle to a property, a single data value representing |
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64 an item of state information. Threads can publish (change) a property value |
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65 through this handle. Threads can also subscribe |
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66 (request notification of changes) to a property value through this handle; |
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67 they can also retrieve the current property value. |
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68 */ |
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69 class RProperty : public RHandleBase |
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70 { |
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71 public: |
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72 /** |
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73 The largest supported property value, in bytes, for byte-array (binary) |
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74 types and text types. |
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75 */ |
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76 enum { KMaxPropertySize = 512 }; |
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77 /** |
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78 The largest supported property value, in bytes, for large byte-array (binary) |
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79 types and large text types. |
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80 */ |
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81 enum { KMaxLargePropertySize = 65535 }; |
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82 |
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83 |
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84 /** |
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85 Property type attribute. |
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86 */ |
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87 enum TType |
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88 { |
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89 /** |
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90 Integral property type. |
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91 */ |
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92 EInt, |
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93 |
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94 |
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95 /** |
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96 Byte-array (binary data) property type. |
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97 This type provides real-time guarantees but is limited to a maximum size |
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98 of 512 bytes. |
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99 |
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100 @see KMaxPropertySize |
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101 */ |
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102 EByteArray, |
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103 |
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104 |
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105 /** |
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106 Text property type. |
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107 This is just a programmer friendly view of a byte-array property, and |
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108 is implemented in the same way as EByteArray. |
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109 */ |
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110 EText = EByteArray, |
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111 |
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112 |
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113 /** |
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114 Large byte-array (binary data) property type. |
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115 This type provides no real-time guarantees but supports properties |
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116 of up to 65536 bytes. |
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117 |
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118 @see KMaxLargePropertySize |
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119 */ |
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120 ELargeByteArray, |
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121 |
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122 |
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123 /** |
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124 Large text property type. |
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125 This is just a programmer friendly view of a byte-array property, and |
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126 is implemented in the same way as EByteArray. |
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127 */ |
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128 ELargeText = ELargeByteArray, |
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129 |
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130 |
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131 /** |
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132 Upper limit for TType values. |
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133 It is the maximal legal TType value plus 1. |
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134 */ |
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135 ETypeLimit, |
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136 |
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137 |
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138 /** |
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139 Bitmask for TType values coded within TInt attributes. |
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140 */ |
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141 ETypeMask = 0xff |
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142 }; |
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143 |
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144 |
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145 public: |
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146 IMPORT_C static TInt Define(TUid aCategory, TUint aKey, TInt aAttr, TInt aPreallocate=0); |
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147 IMPORT_C static TInt Define(TUid aCategory, TUint aKey, TInt aAttr, const TSecurityPolicy& aReadPolicy, const TSecurityPolicy& aWritePolicy, TInt aPreallocated=0); |
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148 IMPORT_C static TInt Define(TUint aKey, TInt aAttr, const TSecurityPolicy& aReadPolicy, const TSecurityPolicy& aWritePolicy, TInt aPreallocated=0); |
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149 IMPORT_C static TInt Delete(TUid aCategory, TUint aKey); |
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150 IMPORT_C static TInt Delete(TUint aKey); |
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151 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TInt& aValue); |
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152 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TDes8& aValue); |
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153 #ifndef __KERNEL_MODE__ |
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154 IMPORT_C static TInt Get(TUid aCategory, TUint aKey, TDes16& aValue); |
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155 #endif |
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156 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, TInt aValue); |
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157 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, const TDesC8& aValue); |
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158 #ifndef __KERNEL_MODE__ |
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159 IMPORT_C static TInt Set(TUid aCategory, TUint aKey, const TDesC16& aValue); |
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160 #endif |
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161 |
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162 IMPORT_C TInt Attach(TUid aCategory, TUint aKey, TOwnerType aType = EOwnerProcess); |
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163 |
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164 IMPORT_C void Subscribe(TRequestStatus& aRequest); |
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165 IMPORT_C void Cancel(); |
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166 |
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167 IMPORT_C TInt Get(TInt& aValue); |
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168 IMPORT_C TInt Get(TDes8& aValue); |
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169 #ifndef __KERNEL_MODE__ |
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170 IMPORT_C TInt Get(TDes16& aValue); |
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171 #endif |
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172 IMPORT_C TInt Set(TInt aValue); |
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173 IMPORT_C TInt Set(const TDesC8& aValue); |
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174 #ifndef __KERNEL_MODE__ |
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175 IMPORT_C TInt Set(const TDesC16& aValue); |
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176 #endif |
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177 }; |
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178 |
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179 #endif |