1 | /** |
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2 | * @file rtems/score/object.h |
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3 | * |
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4 | * This include file contains all the constants and structures associated |
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5 | * with the Object Handler. This Handler provides mechanisms which |
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6 | * can be used to initialize and manipulate all objects which have ids. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * COPYRIGHT (c) 1989-2011. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #ifndef _RTEMS_SCORE_OBJECT_H |
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19 | #define _RTEMS_SCORE_OBJECT_H |
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20 | |
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21 | #include <rtems/score/chain.h> |
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22 | #include <rtems/score/isr.h> |
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23 | |
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24 | #if defined(RTEMS_POSIX_API) |
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25 | /** |
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26 | * This macro is defined when an API is enabled that requires the |
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27 | * use of strings for object names. Since the Classic API uses |
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28 | * 32-bit unsigned integers and not strings, this allows us to |
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29 | * disable this in the smallest RTEMS configuratinos. |
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30 | */ |
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31 | #define RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES |
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32 | #endif |
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33 | |
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34 | #ifdef __cplusplus |
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35 | extern "C" { |
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36 | #endif |
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37 | |
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38 | /** |
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39 | * @defgroup Score SuperCore |
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40 | * |
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41 | * @brief Provides services for all APIs. |
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42 | */ |
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43 | |
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44 | /** |
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45 | * @defgroup ScoreCPU CPU Architecture Support |
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46 | * |
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47 | * @ingroup Score |
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48 | * |
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49 | * @brief Provides CPU architecture dependent services. |
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50 | */ |
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51 | |
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52 | /** |
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53 | * @defgroup ScoreObject Object Handler |
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54 | * |
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55 | * @ingroup Score |
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56 | */ |
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57 | |
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58 | /** |
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59 | * The following type defines the control block used to manage |
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60 | * object names. |
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61 | */ |
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62 | typedef union { |
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63 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
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64 | /** This is a pointer to a string name. */ |
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65 | const char *name_p; |
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66 | #endif |
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67 | /** This is the actual 32-bit "raw" integer name. */ |
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68 | uint32_t name_u32; |
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69 | } Objects_Name; |
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70 | |
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71 | /** |
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72 | * Functions which compare names are prototyped like this. |
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73 | */ |
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74 | typedef bool (*Objects_Name_comparators)( |
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75 | void * /* name_1 */, |
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76 | void * /* name_2 */, |
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77 | uint16_t /* length */ |
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78 | ); |
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79 | |
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80 | #if defined(RTEMS_USE_16_BIT_OBJECT) |
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81 | /** |
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82 | * The following type defines the control block used to manage |
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83 | * object IDs. The format is as follows (0=LSB): |
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84 | * |
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85 | * Bits 0 .. 7 = index (up to 254 objects of a type) |
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86 | * Bits 8 .. 10 = API (up to 7 API classes) |
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87 | * Bits 11 .. 15 = class (up to 31 object types per API) |
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88 | */ |
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89 | typedef uint16_t Objects_Id; |
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90 | |
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91 | /** |
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92 | * This type is used to store the maximum number of allowed objects |
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93 | * of each type. |
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94 | */ |
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95 | typedef uint8_t Objects_Maximum; |
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96 | |
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97 | #define OBJECTS_INDEX_START_BIT 0U |
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98 | #define OBJECTS_API_START_BIT 8U |
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99 | #define OBJECTS_CLASS_START_BIT 11U |
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100 | |
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101 | #define OBJECTS_INDEX_MASK (Objects_Id)0x00ffU |
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102 | #define OBJECTS_API_MASK (Objects_Id)0x0700U |
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103 | #define OBJECTS_CLASS_MASK (Objects_Id)0xF800U |
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104 | |
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105 | #define OBJECTS_INDEX_VALID_BITS (Objects_Id)0x00ffU |
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106 | #define OBJECTS_API_VALID_BITS (Objects_Id)0x0007U |
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107 | /* OBJECTS_NODE_VALID_BITS should not be used with 16 bit Ids */ |
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108 | #define OBJECTS_CLASS_VALID_BITS (Objects_Id)0x001fU |
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109 | |
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110 | #define OBJECTS_UNLIMITED_OBJECTS 0x8000U |
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111 | |
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112 | #define OBJECTS_ID_INITIAL_INDEX (0) |
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113 | #define OBJECTS_ID_FINAL_INDEX (0xff) |
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114 | |
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115 | #else |
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116 | /** |
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117 | * The following type defines the control block used to manage |
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118 | * object IDs. The format is as follows (0=LSB): |
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119 | * |
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120 | * Bits 0 .. 15 = index (up to 65535 objects of a type) |
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121 | * Bits 16 .. 23 = node (up to 255 nodes) |
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122 | * Bits 24 .. 26 = API (up to 7 API classes) |
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123 | * Bits 27 .. 31 = class (up to 31 object types per API) |
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124 | */ |
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125 | typedef uint32_t Objects_Id; |
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126 | |
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127 | /** |
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128 | * This type is used to store the maximum number of allowed objects |
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129 | * of each type. |
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130 | */ |
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131 | typedef uint16_t Objects_Maximum; |
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132 | |
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133 | /** |
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134 | * This is the bit position of the starting bit of the index portion of |
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135 | * the object Id. |
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136 | */ |
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137 | #define OBJECTS_INDEX_START_BIT 0U |
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138 | |
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139 | |
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140 | /** |
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141 | * This is the bit position of the starting bit of the node portion of |
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142 | * the object Id. |
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143 | */ |
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144 | #define OBJECTS_NODE_START_BIT 16U |
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145 | |
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146 | /** |
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147 | * This is the bit position of the starting bit of the API portion of |
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148 | * the object Id. |
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149 | */ |
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150 | #define OBJECTS_API_START_BIT 24U |
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151 | |
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152 | /** |
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153 | * This is the bit position of the starting bit of the class portion of |
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154 | * the object Id. |
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155 | */ |
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156 | #define OBJECTS_CLASS_START_BIT 27U |
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157 | |
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158 | /** |
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159 | * This mask is used to extract the index portion of an object Id. |
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160 | */ |
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161 | #define OBJECTS_INDEX_MASK (Objects_Id)0x0000ffffU |
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162 | |
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163 | /** |
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164 | * This mask is used to extract the node portion of an object Id. |
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165 | */ |
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166 | #define OBJECTS_NODE_MASK (Objects_Id)0x00ff0000U |
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167 | |
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168 | /** |
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169 | * This mask is used to extract the API portion of an object Id. |
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170 | */ |
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171 | #define OBJECTS_API_MASK (Objects_Id)0x07000000U |
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172 | |
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173 | /** |
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174 | * This mask is used to extract the class portion of an object Id. |
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175 | */ |
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176 | #define OBJECTS_CLASS_MASK (Objects_Id)0xf8000000U |
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177 | |
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178 | /** |
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179 | * This mask represents the bits that is used to ensure no extra bits |
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180 | * are set after shifting to extract the index portion of an object Id. |
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181 | */ |
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182 | #define OBJECTS_INDEX_VALID_BITS (Objects_Id)0x0000ffffU |
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183 | |
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184 | /** |
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185 | * This mask represents the bits that is used to ensure no extra bits |
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186 | * are set after shifting to extract the node portion of an object Id. |
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187 | */ |
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188 | #define OBJECTS_NODE_VALID_BITS (Objects_Id)0x000000ffU |
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189 | |
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190 | /** |
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191 | * This mask represents the bits that is used to ensure no extra bits |
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192 | * are set after shifting to extract the API portion of an object Id. |
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193 | */ |
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194 | #define OBJECTS_API_VALID_BITS (Objects_Id)0x00000007U |
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195 | |
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196 | /** |
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197 | * This mask represents the bits that is used to ensure no extra bits |
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198 | * are set after shifting to extract the class portion of an object Id. |
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199 | */ |
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200 | #define OBJECTS_CLASS_VALID_BITS (Objects_Id)0x0000001fU |
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201 | |
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202 | /** |
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203 | * Mask to enable unlimited objects. This is used in the configuration |
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204 | * table when specifying the number of configured objects. |
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205 | */ |
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206 | #define OBJECTS_UNLIMITED_OBJECTS 0x80000000U |
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207 | |
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208 | /** |
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209 | * This is the lowest value for the index portion of an object Id. |
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210 | */ |
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211 | #define OBJECTS_ID_INITIAL_INDEX (0) |
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212 | |
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213 | /** |
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214 | * This is the highest value for the index portion of an object Id. |
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215 | */ |
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216 | #define OBJECTS_ID_FINAL_INDEX (0xffffU) |
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217 | #endif |
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218 | |
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219 | /** |
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220 | * This enumerated type is used in the class field of the object ID. |
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221 | */ |
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222 | typedef enum { |
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223 | OBJECTS_NO_API = 0, |
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224 | OBJECTS_INTERNAL_API = 1, |
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225 | OBJECTS_CLASSIC_API = 2, |
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226 | OBJECTS_POSIX_API = 3 |
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227 | } Objects_APIs; |
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228 | |
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229 | /** This macro is used to generically specify the last API index. */ |
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230 | #define OBJECTS_APIS_LAST OBJECTS_POSIX_API |
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231 | |
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232 | /** |
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233 | * This enumerated type is used in the class field of the object ID |
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234 | * for RTEMS internal object classes. |
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235 | */ |
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236 | typedef enum { |
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237 | OBJECTS_INTERNAL_NO_CLASS = 0, |
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238 | OBJECTS_INTERNAL_THREADS = 1, |
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239 | OBJECTS_INTERNAL_MUTEXES = 2 |
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240 | } Objects_Internal_API; |
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241 | |
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242 | /** This macro is used to generically specify the last API index. */ |
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243 | #define OBJECTS_INTERNAL_CLASSES_LAST OBJECTS_INTERNAL_MUTEXES |
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244 | |
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245 | /** |
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246 | * This enumerated type is used in the class field of the object ID |
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247 | * for the RTEMS Classic API. |
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248 | */ |
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249 | typedef enum { |
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250 | OBJECTS_CLASSIC_NO_CLASS = 0, |
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251 | OBJECTS_RTEMS_TASKS = 1, |
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252 | OBJECTS_RTEMS_TIMERS = 2, |
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253 | OBJECTS_RTEMS_SEMAPHORES = 3, |
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254 | OBJECTS_RTEMS_MESSAGE_QUEUES = 4, |
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255 | OBJECTS_RTEMS_PARTITIONS = 5, |
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256 | OBJECTS_RTEMS_REGIONS = 6, |
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257 | OBJECTS_RTEMS_PORTS = 7, |
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258 | OBJECTS_RTEMS_PERIODS = 8, |
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259 | OBJECTS_RTEMS_EXTENSIONS = 9, |
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260 | OBJECTS_RTEMS_BARRIERS = 10 |
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261 | } Objects_Classic_API; |
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262 | |
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263 | /** This macro is used to generically specify the last API index. */ |
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264 | #define OBJECTS_RTEMS_CLASSES_LAST OBJECTS_RTEMS_BARRIERS |
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265 | |
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266 | /** |
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267 | * This enumerated type is used in the class field of the object ID |
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268 | * for the POSIX API. |
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269 | */ |
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270 | typedef enum { |
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271 | OBJECTS_POSIX_NO_CLASS = 0, |
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272 | OBJECTS_POSIX_THREADS = 1, |
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273 | OBJECTS_POSIX_KEYS = 2, |
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274 | OBJECTS_POSIX_INTERRUPTS = 3, |
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275 | OBJECTS_POSIX_MESSAGE_QUEUE_FDS = 4, |
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276 | OBJECTS_POSIX_MESSAGE_QUEUES = 5, |
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277 | OBJECTS_POSIX_MUTEXES = 6, |
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278 | OBJECTS_POSIX_SEMAPHORES = 7, |
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279 | OBJECTS_POSIX_CONDITION_VARIABLES = 8, |
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280 | OBJECTS_POSIX_TIMERS = 9, |
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281 | OBJECTS_POSIX_BARRIERS = 10, |
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282 | OBJECTS_POSIX_SPINLOCKS = 11, |
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283 | OBJECTS_POSIX_RWLOCKS = 12 |
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284 | } Objects_POSIX_API; |
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285 | |
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286 | /** This macro is used to generically specify the last API index. */ |
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287 | #define OBJECTS_POSIX_CLASSES_LAST OBJECTS_POSIX_RWLOCKS |
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288 | |
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289 | /** |
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290 | * This enumerated type lists the locations which may be returned |
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291 | * by _Objects_Get. These codes indicate the success of locating |
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292 | * an object with the specified ID. |
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293 | */ |
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294 | typedef enum { |
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295 | #if defined(RTEMS_MULTIPROCESSING) |
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296 | OBJECTS_REMOTE = 2, /* object is remote */ |
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297 | #endif |
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298 | OBJECTS_LOCAL = 0, /* object is local */ |
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299 | OBJECTS_ERROR = 1 /* id was invalid */ |
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300 | } Objects_Locations; |
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301 | |
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302 | /** |
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303 | * The following type defines the callout used when a local task |
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304 | * is extracted from a remote thread queue (i.e. it's proxy must |
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305 | * extracted from the remote queue). |
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306 | */ |
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307 | typedef void ( *Objects_Thread_queue_Extract_callout )( void * ); |
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308 | |
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309 | /** |
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310 | * The following defines the Object Control Block used to manage |
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311 | * each object local to this node. |
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312 | */ |
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313 | typedef struct { |
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314 | /** This is the chain node portion of an object. */ |
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315 | Chain_Node Node; |
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316 | /** This is the object's ID. */ |
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317 | Objects_Id id; |
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318 | /** This is the object's name. */ |
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319 | Objects_Name name; |
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320 | } Objects_Control; |
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321 | |
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322 | /** |
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323 | * The following defines the structure for the information used to |
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324 | * manage each class of objects. |
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325 | */ |
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326 | typedef struct { |
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327 | /** This field indicates the API of this object class. */ |
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328 | Objects_APIs the_api; |
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329 | /** This is the class of this object set. */ |
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330 | uint16_t the_class; |
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331 | /** This is the minimum valid id of this object class. */ |
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332 | Objects_Id minimum_id; |
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333 | /** This is the maximum valid id of this object class. */ |
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334 | Objects_Id maximum_id; |
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335 | /** This is the maximum number of objects in this class. */ |
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336 | Objects_Maximum maximum; |
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337 | /** This is the true if unlimited objects in this class. */ |
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338 | bool auto_extend; |
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339 | /** This is the number of objects in a block. */ |
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340 | Objects_Maximum allocation_size; |
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341 | /** This is the size in bytes of each object instance. */ |
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342 | size_t size; |
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343 | /** This points to the table of local objects. */ |
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344 | Objects_Control **local_table; |
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345 | /** This is the chain of inactive control blocks. */ |
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346 | Chain_Control Inactive; |
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347 | /** This is the number of objects on the Inactive list. */ |
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348 | Objects_Maximum inactive; |
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349 | /** This is the number of inactive objects per block. */ |
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350 | uint32_t *inactive_per_block; |
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351 | /** This is a table to the chain of inactive object memory blocks. */ |
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352 | void **object_blocks; |
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353 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
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354 | /** This is true if names are strings. */ |
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355 | bool is_string; |
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356 | #endif |
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357 | /** This is the maximum length of names. */ |
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358 | uint16_t name_length; |
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359 | /** This is this object class' method called when extracting a thread. */ |
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360 | Objects_Thread_queue_Extract_callout extract; |
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361 | #if defined(RTEMS_MULTIPROCESSING) |
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362 | /** This is this object class' pointer to the global name table */ |
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363 | Chain_Control *global_table; |
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364 | #endif |
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365 | } Objects_Information; |
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366 | |
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367 | /** |
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368 | * The following is referenced to the node number of the local node. |
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369 | */ |
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370 | #if defined(RTEMS_MULTIPROCESSING) |
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371 | SCORE_EXTERN uint16_t _Objects_Local_node; |
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372 | #else |
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373 | #define _Objects_Local_node ((uint16_t)1) |
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374 | #endif |
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375 | |
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376 | /** |
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377 | * The following is referenced to the number of nodes in the system. |
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378 | */ |
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379 | #if defined(RTEMS_MULTIPROCESSING) |
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380 | SCORE_EXTERN uint16_t _Objects_Maximum_nodes; |
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381 | #else |
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382 | #define _Objects_Maximum_nodes 1 |
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383 | #endif |
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384 | |
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385 | /** |
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386 | * The following is the list of information blocks per API for each object |
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387 | * class. From the ID, we can go to one of these information blocks, |
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388 | * and obtain a pointer to the appropriate object control block. |
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389 | */ |
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390 | SCORE_EXTERN Objects_Information |
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391 | **_Objects_Information_table[OBJECTS_APIS_LAST + 1]; |
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392 | |
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393 | /** |
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394 | * No object can have this ID. |
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395 | */ |
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396 | #define OBJECTS_ID_NONE 0 |
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397 | |
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398 | /** |
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399 | * The following defines the constant which may be used |
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400 | * with _Objects_Get to manipulate the calling task. |
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401 | */ |
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402 | #define OBJECTS_ID_OF_SELF ((Objects_Id) 0) |
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403 | |
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404 | /** |
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405 | * The following constant is used to specify that a name to ID search |
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406 | * should search through all nodes. |
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407 | */ |
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408 | #define OBJECTS_SEARCH_ALL_NODES 0 |
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409 | |
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410 | /** |
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411 | * The following constant is used to specify that a name to ID search |
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412 | * should search through all nodes except the current node. |
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413 | */ |
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414 | #define OBJECTS_SEARCH_OTHER_NODES 0x7FFFFFFE |
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415 | |
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416 | /** |
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417 | * The following constant is used to specify that a name to ID search |
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418 | * should search only on this node. |
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419 | */ |
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420 | #define OBJECTS_SEARCH_LOCAL_NODE 0x7FFFFFFF |
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421 | |
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422 | /** |
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423 | * The following constant is used to specify that a name to ID search |
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424 | * is being asked for the ID of the currently executing task. |
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425 | */ |
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426 | #define OBJECTS_WHO_AM_I 0 |
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427 | |
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428 | /** |
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429 | * This macros calculates the lowest ID for the specified api, class, |
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430 | * and node. |
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431 | */ |
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432 | #define OBJECTS_ID_INITIAL(_api, _class, _node) \ |
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433 | _Objects_Build_id( (_api), (_class), (_node), OBJECTS_ID_INITIAL_INDEX ) |
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434 | |
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435 | /** |
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436 | * This macro specifies the highest object ID value |
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437 | */ |
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438 | #define OBJECTS_ID_FINAL ((Objects_Id)~0) |
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439 | |
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440 | /** |
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441 | * This function extends an object class information record. |
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442 | * |
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443 | * @param[in] information points to an object class information block. |
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444 | */ |
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445 | void _Objects_Extend_information( |
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446 | Objects_Information *information |
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447 | ); |
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448 | |
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449 | /** |
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450 | * This function shrink an object class information record. |
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451 | * |
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452 | * @param[in] information points to an object class information block. |
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453 | */ |
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454 | void _Objects_Shrink_information( |
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455 | Objects_Information *information |
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456 | ); |
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457 | |
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458 | /** |
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459 | * @brief Initialize object Information |
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460 | * |
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461 | * This function initializes an object class information record. |
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462 | * SUPPORTS_GLOBAL is true if the object class supports global |
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463 | * objects, and false otherwise. Maximum indicates the number |
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464 | * of objects required in this class and size indicates the size |
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465 | * in bytes of each control block for this object class. The |
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466 | * name length and string designator are also set. In addition, |
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467 | * the class may be a task, therefore this information is also included. |
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468 | * |
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469 | * @param[in] information points to an object class information block. |
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470 | * @param[in] the_api indicates the API associated with this information block. |
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471 | * @param[in] the_class indicates the class of object being managed |
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472 | * by this information block. It is specific to @a the_api. |
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473 | * @param[in] maximum is the maximum number of instances of this object |
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474 | * class which may be concurrently active. |
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475 | * @param[in] size is the size of the data structure for this class. |
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476 | * @param[in] is_string is true if this object uses string style names. |
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477 | * @param[in] maximum_name_length is the maximum length of object names. |
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478 | */ |
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479 | void _Objects_Initialize_information ( |
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480 | Objects_Information *information, |
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481 | Objects_APIs the_api, |
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482 | uint16_t the_class, |
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483 | uint32_t maximum, |
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484 | uint16_t size, |
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485 | bool is_string, |
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486 | uint32_t maximum_name_length |
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487 | #if defined(RTEMS_MULTIPROCESSING) |
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488 | , |
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489 | bool supports_global, |
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490 | Objects_Thread_queue_Extract_callout extract |
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491 | #endif |
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492 | ); |
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493 | |
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494 | /** |
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495 | * This function returns the highest numeric value of a valid |
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496 | * API for the specified @a api. |
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497 | * |
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498 | * @param[in] api is the API of interest |
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499 | * |
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500 | * @return A positive integer on success and 0 otherwise. |
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501 | */ |
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502 | unsigned int _Objects_API_maximum_class( |
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503 | uint32_t api |
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504 | ); |
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505 | |
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506 | /** |
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507 | * This function allocates a object control block from |
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508 | * the inactive chain of free object control blocks. |
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509 | * |
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510 | * @param[in] information points to an object class information block. |
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511 | */ |
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512 | Objects_Control *_Objects_Allocate( |
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513 | Objects_Information *information |
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514 | ); |
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515 | |
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516 | /** |
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517 | * |
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518 | * This function frees a object control block to the |
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519 | * inactive chain of free object control blocks. |
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520 | * |
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521 | * @param[in] information points to an object class information block. |
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522 | * @param[in] the_object points to the object to deallocate. |
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523 | */ |
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524 | void _Objects_Free( |
---|
525 | Objects_Information *information, |
---|
526 | Objects_Control *the_object |
---|
527 | ); |
---|
528 | |
---|
529 | /** |
---|
530 | * This macro is used to build a thirty-two bit style name from |
---|
531 | * four characters. The most significant byte will be the |
---|
532 | * character @a _C1. |
---|
533 | * |
---|
534 | * @param[in] _C1 is the first character of the name |
---|
535 | * @param[in] _C2 is the second character of the name |
---|
536 | * @param[in] _C3 is the third character of the name |
---|
537 | * @param[in] _C4 is the fourth character of the name |
---|
538 | */ |
---|
539 | #define _Objects_Build_name( _C1, _C2, _C3, _C4 ) \ |
---|
540 | ( (uint32_t)(_C1) << 24 | \ |
---|
541 | (uint32_t)(_C2) << 16 | \ |
---|
542 | (uint32_t)(_C3) << 8 | \ |
---|
543 | (uint32_t)(_C4) ) |
---|
544 | |
---|
545 | /** |
---|
546 | * This function implements the common portion of the object |
---|
547 | * identification directives. This directive returns the object |
---|
548 | * id associated with name. If more than one object of this class |
---|
549 | * is named name, then the object to which the id belongs is |
---|
550 | * arbitrary. Node indicates the extent of the search for the |
---|
551 | * id of the object named name. If the object class supports global |
---|
552 | * objects, then the search can be limited to a particular node |
---|
553 | * or allowed to encompass all nodes. |
---|
554 | */ |
---|
555 | typedef enum { |
---|
556 | OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL, |
---|
557 | OBJECTS_INVALID_NAME, |
---|
558 | OBJECTS_INVALID_ADDRESS, |
---|
559 | OBJECTS_INVALID_ID, |
---|
560 | OBJECTS_INVALID_NODE |
---|
561 | } Objects_Name_or_id_lookup_errors; |
---|
562 | |
---|
563 | /** |
---|
564 | * This macro defines the first entry in the |
---|
565 | * @ref Objects_Name_or_id_lookup_errors enumerated list. |
---|
566 | */ |
---|
567 | #define OBJECTS_NAME_ERRORS_FIRST OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL |
---|
568 | |
---|
569 | /** |
---|
570 | * This macro defines the last entry in the |
---|
571 | * @ref Objects_Name_or_id_lookup_errors enumerated list. |
---|
572 | */ |
---|
573 | #define OBJECTS_NAME_ERRORS_LAST OBJECTS_INVALID_NODE |
---|
574 | |
---|
575 | /** |
---|
576 | * This method converts an object name to an Id. It performs a look up |
---|
577 | * using the object information block for this object class. |
---|
578 | * |
---|
579 | * @param[in] information points to an object class information block. |
---|
580 | * @param[in] name is the name of the object to find. |
---|
581 | * @param[in] node is the set of nodes to search. |
---|
582 | * @param[in] id will contain the Id if the search is successful. |
---|
583 | * |
---|
584 | * @return This method returns one of the values from the |
---|
585 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
586 | * successful or failure. On success @a id will contain the Id of |
---|
587 | * the requested object. |
---|
588 | */ |
---|
589 | Objects_Name_or_id_lookup_errors _Objects_Name_to_id_u32( |
---|
590 | Objects_Information *information, |
---|
591 | uint32_t name, |
---|
592 | uint32_t node, |
---|
593 | Objects_Id *id |
---|
594 | ); |
---|
595 | |
---|
596 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
---|
597 | /** |
---|
598 | * This method converts an object name to an Id. It performs a look up |
---|
599 | * using the object information block for this object class. |
---|
600 | * |
---|
601 | * @param[in] information points to an object class information block. |
---|
602 | * @param[in] name is the name of the object to find. |
---|
603 | * @param[in] id will contain the Id if the search is successful. |
---|
604 | * |
---|
605 | * @return This method returns one of the values from the |
---|
606 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
607 | * successful or failure. On success @a id will contain the Id of |
---|
608 | * the requested object. |
---|
609 | */ |
---|
610 | Objects_Name_or_id_lookup_errors _Objects_Name_to_id_string( |
---|
611 | Objects_Information *information, |
---|
612 | const char *name, |
---|
613 | Objects_Id *id |
---|
614 | ); |
---|
615 | #endif |
---|
616 | |
---|
617 | /** |
---|
618 | * This function implements the common portion of the object Id |
---|
619 | * to name directives. This function returns the name |
---|
620 | * associated with object id. |
---|
621 | * |
---|
622 | * @param[in] id is the Id of the object whose name we are locating. |
---|
623 | * @param[in] name will contain the name of the object, if found. |
---|
624 | * |
---|
625 | * @return This method returns one of the values from the |
---|
626 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
627 | * successful or failure. On success @a name will contain the name of |
---|
628 | * the requested object. |
---|
629 | * |
---|
630 | * @note This function currently does not support string names. |
---|
631 | */ |
---|
632 | Objects_Name_or_id_lookup_errors _Objects_Id_to_name ( |
---|
633 | Objects_Id id, |
---|
634 | Objects_Name *name |
---|
635 | ); |
---|
636 | |
---|
637 | /** |
---|
638 | * This function maps object ids to object control blocks. |
---|
639 | * If id corresponds to a local object, then it returns |
---|
640 | * the_object control pointer which maps to id and location |
---|
641 | * is set to OBJECTS_LOCAL. If the object class supports global |
---|
642 | * objects and the object id is global and resides on a remote |
---|
643 | * node, then location is set to OBJECTS_REMOTE, and the_object |
---|
644 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
---|
645 | * and the_object is undefined. |
---|
646 | * |
---|
647 | * @param[in] information points to an object class information block. |
---|
648 | * @param[in] id is the Id of the object whose name we are locating. |
---|
649 | * @param[in] location will contain an indication of success or failure. |
---|
650 | * |
---|
651 | * @return This method returns one of the values from the |
---|
652 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
653 | * successful or failure. On success @a id will contain the Id of |
---|
654 | * the requested object. |
---|
655 | * |
---|
656 | * @note _Objects_Get returns with dispatching disabled for |
---|
657 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
658 | * dispatching disabled for remote objects and interrupts for local |
---|
659 | * objects. |
---|
660 | */ |
---|
661 | Objects_Control *_Objects_Get ( |
---|
662 | Objects_Information *information, |
---|
663 | Objects_Id id, |
---|
664 | Objects_Locations *location |
---|
665 | ); |
---|
666 | |
---|
667 | /** |
---|
668 | * This function maps object ids to object control blocks. |
---|
669 | * If id corresponds to a local object, then it returns |
---|
670 | * the_object control pointer which maps to id and location |
---|
671 | * is set to OBJECTS_LOCAL. If the object class supports global |
---|
672 | * objects and the object id is global and resides on a remote |
---|
673 | * node, then location is set to OBJECTS_REMOTE, and the_object |
---|
674 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
---|
675 | * and the_object is undefined. |
---|
676 | * |
---|
677 | * @param[in] information points to an object class information block. |
---|
678 | * @param[in] id is the Id of the object whose name we are locating. |
---|
679 | * @param[in] location will contain an indication of success or failure. |
---|
680 | * @param[in] level is the interrupt level being turned. |
---|
681 | * |
---|
682 | * @return This method returns one of the values from the |
---|
683 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
684 | * successful or failure. On success @a name will contain the name of |
---|
685 | * the requested object. |
---|
686 | * |
---|
687 | * @note _Objects_Get returns with dispatching disabled for |
---|
688 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
689 | * dispatchng disabled for remote objects and interrupts for local |
---|
690 | * objects. |
---|
691 | */ |
---|
692 | Objects_Control *_Objects_Get_isr_disable( |
---|
693 | Objects_Information *information, |
---|
694 | Objects_Id id, |
---|
695 | Objects_Locations *location, |
---|
696 | ISR_Level *level |
---|
697 | ); |
---|
698 | |
---|
699 | /** |
---|
700 | * This function maps object ids to object control blocks. |
---|
701 | * If id corresponds to a local object, then it returns |
---|
702 | * the_object control pointer which maps to id and location |
---|
703 | * is set to OBJECTS_LOCAL. If the object class supports global |
---|
704 | * objects and the object id is global and resides on a remote |
---|
705 | * node, then location is set to OBJECTS_REMOTE, and the_object |
---|
706 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
---|
707 | * and the_object is undefined. |
---|
708 | * |
---|
709 | * @param[in] information points to an object class information block. |
---|
710 | * @param[in] id is the Id of the object whose name we are locating. |
---|
711 | * @param[in] location will contain an indication of success or failure. |
---|
712 | * |
---|
713 | * @return This method returns one of the values from the |
---|
714 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
715 | * successful or failure. On success @a id will contain the Id of |
---|
716 | * the requested object. |
---|
717 | * |
---|
718 | * @note _Objects_Get returns with dispatching disabled for |
---|
719 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
720 | * dispatching disabled for remote objects and interrupts for local |
---|
721 | * objects. |
---|
722 | */ |
---|
723 | Objects_Control *_Objects_Get_no_protection( |
---|
724 | Objects_Information *information, |
---|
725 | Objects_Id id, |
---|
726 | Objects_Locations *location |
---|
727 | ); |
---|
728 | |
---|
729 | /** |
---|
730 | * Like @ref _Objects_Get, but is used to find "next" open object. |
---|
731 | * |
---|
732 | * @param[in] information points to an object class information block. |
---|
733 | * @param[in] id is the Id of the object whose name we are locating. |
---|
734 | * @param[in] location_p will contain an indication of success or failure. |
---|
735 | * @param[in] next_id_p is the Id of the next object we will look at. |
---|
736 | * |
---|
737 | * @return This method returns the pointer to the object located or |
---|
738 | * NULL on error. |
---|
739 | */ |
---|
740 | Objects_Control *_Objects_Get_next( |
---|
741 | Objects_Information *information, |
---|
742 | Objects_Id id, |
---|
743 | Objects_Locations *location_p, |
---|
744 | Objects_Id *next_id_p |
---|
745 | ); |
---|
746 | |
---|
747 | /** |
---|
748 | * This function return the information structure given |
---|
749 | * an the API and Class. This can be done independent of |
---|
750 | * the existence of any objects created by the API. |
---|
751 | * |
---|
752 | * @param[in] the_api indicates the API for the information we want |
---|
753 | * @param[in] the_class indicates the Class for the information we want |
---|
754 | * |
---|
755 | * @return This method returns a pointer to the Object Information Table |
---|
756 | * for the class of objects which corresponds to this object ID. |
---|
757 | */ |
---|
758 | Objects_Information *_Objects_Get_information( |
---|
759 | Objects_APIs the_api, |
---|
760 | uint16_t the_class |
---|
761 | ); |
---|
762 | |
---|
763 | /** |
---|
764 | * This function return the information structure given |
---|
765 | * an id of an object. |
---|
766 | * |
---|
767 | * @param[in] id is an object ID |
---|
768 | * |
---|
769 | * @return This method returns a pointer to the Object Information Table |
---|
770 | * for the class of objects which corresponds to this object ID. |
---|
771 | */ |
---|
772 | Objects_Information *_Objects_Get_information_id( |
---|
773 | Objects_Id id |
---|
774 | ); |
---|
775 | |
---|
776 | /** |
---|
777 | * This method objects the name of an object and returns its name |
---|
778 | * in the form of a C string. It attempts to be careful about |
---|
779 | * overflowing the user's string and about returning unprintable characters. |
---|
780 | * |
---|
781 | * @param[in] id is the object to obtain the name of |
---|
782 | * @param[in] length indicates the length of the caller's buffer |
---|
783 | * @param[in] name points a string which will be filled in. |
---|
784 | * |
---|
785 | * @return This method returns @a name or NULL on error. @a *name will |
---|
786 | * contain the name if successful. |
---|
787 | */ |
---|
788 | char *_Objects_Get_name_as_string( |
---|
789 | Objects_Id id, |
---|
790 | size_t length, |
---|
791 | char *name |
---|
792 | ); |
---|
793 | |
---|
794 | /** |
---|
795 | * This method sets the object name to either a copy of a string |
---|
796 | * or up to the first four characters of the string based upon |
---|
797 | * whether this object class uses strings for names. |
---|
798 | * |
---|
799 | * @param[in] information points to the object information structure |
---|
800 | * @param[in] the_object is the object to operate upon |
---|
801 | * @param[in] name is a pointer to the name to use |
---|
802 | * |
---|
803 | * @return If successful, true is returned. Otherwise false is returned. |
---|
804 | */ |
---|
805 | bool _Objects_Set_name( |
---|
806 | Objects_Information *information, |
---|
807 | Objects_Control *the_object, |
---|
808 | const char *name |
---|
809 | ); |
---|
810 | |
---|
811 | /** |
---|
812 | * This function removes the_object from the namespace. |
---|
813 | * |
---|
814 | * @param[in] information points to an Object Information Table |
---|
815 | * @param[in] the_object is a pointer to an object |
---|
816 | */ |
---|
817 | void _Objects_Namespace_remove( |
---|
818 | Objects_Information *information, |
---|
819 | Objects_Control *the_object |
---|
820 | ); |
---|
821 | |
---|
822 | /** |
---|
823 | * This function removes the_object control pointer and object name |
---|
824 | * in the Local Pointer and Local Name Tables. |
---|
825 | * |
---|
826 | * @param[in] information points to an Object Information Table |
---|
827 | * @param[in] the_object is a pointer to an object |
---|
828 | */ |
---|
829 | void _Objects_Close( |
---|
830 | Objects_Information *information, |
---|
831 | Objects_Control *the_object |
---|
832 | ); |
---|
833 | |
---|
834 | /* |
---|
835 | * Pieces of object.inl are promoted out to the user |
---|
836 | */ |
---|
837 | |
---|
838 | #include <rtems/score/object.inl> |
---|
839 | #if defined(RTEMS_MULTIPROCESSING) |
---|
840 | #include <rtems/score/objectmp.h> |
---|
841 | #endif |
---|
842 | |
---|
843 | #ifdef __cplusplus |
---|
844 | } |
---|
845 | #endif |
---|
846 | |
---|
847 | #endif |
---|
848 | /* end of include file */ |
---|