1 | /** |
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2 | * @file rtems/score/object.h |
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3 | */ |
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4 | |
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5 | /* |
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6 | * This include file contains all the constants and structures associated |
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7 | * with the Object Handler. This Handler provides mechanisms which |
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8 | * can be used to initialize and manipulate all objects which have |
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9 | * ids. |
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10 | * |
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11 | * COPYRIGHT (c) 1989-2004. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | * |
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18 | * $Id$ |
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19 | */ |
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20 | |
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21 | #ifndef __OBJECTS_h |
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22 | #define __OBJECTS_h |
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23 | |
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24 | #ifdef __cplusplus |
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25 | extern "C" { |
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26 | #endif |
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27 | |
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28 | #include <rtems/score/chain.h> |
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29 | #include <rtems/score/isr.h> |
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30 | |
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31 | /* |
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32 | * Mask to enable unlimited objects. This is used in the configuration |
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33 | * table when specifying the number of configured objects. |
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34 | */ |
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35 | |
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36 | #define OBJECTS_UNLIMITED_OBJECTS 0x80000000 |
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37 | |
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38 | /* |
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39 | * The following type defines the control block used to manage |
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40 | * object names. |
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41 | */ |
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42 | |
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43 | typedef void * Objects_Name; |
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44 | |
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45 | /* |
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46 | * Space for object names is allocated in multiples of this. |
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47 | * |
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48 | * NOTE: Must be a power of 2. Matches the name manipulation routines. |
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49 | */ |
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50 | |
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51 | #define OBJECTS_NAME_ALIGNMENT sizeof( uint32_t ) |
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52 | |
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53 | /* |
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54 | * Functions which compare names are prototyped like this. |
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55 | */ |
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56 | |
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57 | typedef boolean (*Objects_Name_comparators)( |
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58 | void * /* name_1 */, |
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59 | void * /* name_2 */, |
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60 | uint16_t /* length */ |
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61 | ); |
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62 | |
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63 | #if defined(RTEMS_USE_16_BIT_OBJECT) |
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64 | /* |
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65 | * The following type defines the control block used to manage |
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66 | * object IDs. The format is as follows (0=LSB): |
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67 | * |
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68 | * Bits 0 .. 7 = index (up to 254 objects of a type) |
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69 | * Bits 8 .. 10 = API (up to 7 API classes) |
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70 | * Bits 11 .. 15 = class (up to 31 object types per API) |
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71 | */ |
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72 | |
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73 | typedef uint16_t Objects_Id; |
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74 | typedef uint8_t Objects_Maximum; |
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75 | |
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76 | #define OBJECTS_INDEX_START_BIT 0 |
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77 | #define OBJECTS_API_START_BIT 8 |
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78 | #define OBJECTS_CLASS_START_BIT 11 |
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79 | |
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80 | #define OBJECTS_INDEX_MASK (Objects_Id)0x000000ff |
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81 | #define OBJECTS_API_MASK (Objects_Id)0x00000700 |
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82 | #define OBJECTS_CLASS_MASK (Objects_Id)0x0000F800 |
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83 | |
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84 | #else |
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85 | /* |
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86 | * The following type defines the control block used to manage |
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87 | * object IDs. The format is as follows (0=LSB): |
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88 | * |
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89 | * Bits 0 .. 15 = index (up to 65535 objects of a type) |
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90 | * Bits 16 .. 23 = node (up to 255 nodes) |
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91 | * Bits 24 .. 26 = API (up to 7 API classes) |
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92 | * Bits 27 .. 31 = class (up to 31 object types per API) |
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93 | */ |
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94 | |
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95 | typedef uint32_t Objects_Id; |
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96 | typedef uint16_t Objects_Maximum; |
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97 | |
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98 | #define OBJECTS_INDEX_START_BIT 0 |
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99 | #define OBJECTS_NODE_START_BIT 16 |
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100 | #define OBJECTS_API_START_BIT 24 |
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101 | #define OBJECTS_CLASS_START_BIT 27 |
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102 | |
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103 | #define OBJECTS_INDEX_MASK (Objects_Id)0x0000ffff |
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104 | #define OBJECTS_NODE_MASK (Objects_Id)0x00ff0000 |
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105 | #define OBJECTS_API_MASK (Objects_Id)0x07000000 |
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106 | #define OBJECTS_CLASS_MASK (Objects_Id)0xf8000000 |
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107 | |
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108 | #define OBJECTS_INDEX_VALID_BITS (Objects_Id)0x0000ffff |
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109 | #define OBJECTS_NODE_VALID_BITS (Objects_Id)0x000000ff |
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110 | #define OBJECTS_API_VALID_BITS (Objects_Id)0x00000007 |
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111 | #define OBJECTS_CLASS_VALID_BITS (Objects_Id)0x0000001f |
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112 | #endif |
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113 | |
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114 | /* |
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115 | * This enumerated type is used in the class field of the object ID. |
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116 | */ |
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117 | |
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118 | #define OBJECTS_NO_CLASS 0 |
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119 | |
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120 | typedef enum { |
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121 | OBJECTS_NO_API = 0, |
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122 | OBJECTS_INTERNAL_API = 1, |
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123 | OBJECTS_CLASSIC_API = 2, |
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124 | OBJECTS_POSIX_API = 3, |
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125 | OBJECTS_ITRON_API = 4 |
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126 | } Objects_APIs; |
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127 | |
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128 | #define OBJECTS_APIS_LAST OBJECTS_ITRON_API |
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129 | |
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130 | typedef enum { |
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131 | OBJECTS_INTERNAL_NO_CLASS = 0, |
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132 | OBJECTS_INTERNAL_THREADS = 1, |
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133 | OBJECTS_INTERNAL_MUTEXES = 2 |
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134 | } Objects_Internal_API; |
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135 | |
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136 | #define OBJECTS_INTERNAL_CLASSES_LAST OBJECTS_INTERNAL_MUTEXES |
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137 | |
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138 | typedef enum { |
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139 | OBJECTS_CLASSIC_NO_CLASS = 0, |
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140 | OBJECTS_RTEMS_TASKS = 1, |
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141 | OBJECTS_RTEMS_TIMERS = 2, |
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142 | OBJECTS_RTEMS_SEMAPHORES = 3, |
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143 | OBJECTS_RTEMS_MESSAGE_QUEUES = 4, |
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144 | OBJECTS_RTEMS_PARTITIONS = 5, |
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145 | OBJECTS_RTEMS_REGIONS = 6, |
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146 | OBJECTS_RTEMS_PORTS = 7, |
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147 | OBJECTS_RTEMS_PERIODS = 8, |
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148 | OBJECTS_RTEMS_EXTENSIONS = 9 |
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149 | } Objects_Classic_API; |
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150 | |
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151 | #define OBJECTS_RTEMS_CLASSES_LAST OBJECTS_RTEMS_EXTENSIONS |
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152 | |
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153 | typedef enum { |
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154 | OBJECTS_POSIX_NO_CLASS = 0, |
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155 | OBJECTS_POSIX_THREADS = 1, |
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156 | OBJECTS_POSIX_KEYS = 2, |
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157 | OBJECTS_POSIX_INTERRUPTS = 3, |
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158 | OBJECTS_POSIX_MESSAGE_QUEUE_FDS = 4, |
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159 | OBJECTS_POSIX_MESSAGE_QUEUES = 5, |
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160 | OBJECTS_POSIX_MUTEXES = 6, |
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161 | OBJECTS_POSIX_SEMAPHORES = 7, |
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162 | OBJECTS_POSIX_CONDITION_VARIABLES = 8 |
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163 | } Objects_POSIX_API; |
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164 | |
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165 | #define OBJECTS_POSIX_CLASSES_LAST OBJECTS_POSIX_CONDITION_VARIABLES |
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166 | |
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167 | typedef enum { |
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168 | OBJECTS_ITRON_NO_CLASS = 0, |
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169 | OBJECTS_ITRON_TASKS = 1, |
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170 | OBJECTS_ITRON_EVENTFLAGS = 2, |
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171 | OBJECTS_ITRON_MAILBOXES = 3, |
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172 | OBJECTS_ITRON_MESSAGE_BUFFERS = 4, |
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173 | OBJECTS_ITRON_PORTS = 5, |
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174 | OBJECTS_ITRON_SEMAPHORES = 6, |
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175 | OBJECTS_ITRON_VARIABLE_MEMORY_POOLS = 7, |
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176 | OBJECTS_ITRON_FIXED_MEMORY_POOLS = 8 |
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177 | } Objects_ITRON_API; |
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178 | |
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179 | #define OBJECTS_ITRON_CLASSES_LAST OBJECTS_ITRON_FIXED_MEMORY_POOLS |
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180 | |
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181 | /* |
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182 | * This enumerated type lists the locations which may be returned |
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183 | * by _Objects_Get. These codes indicate the success of locating |
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184 | * an object with the specified ID. |
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185 | */ |
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186 | |
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187 | typedef enum { |
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188 | OBJECTS_LOCAL = 0, /* object is local */ |
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189 | OBJECTS_REMOTE = 1, /* object is remote */ |
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190 | OBJECTS_ERROR = 2 /* id was invalid */ |
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191 | } Objects_Locations; |
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192 | |
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193 | /* |
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194 | * The following type defines the callout used when a local task |
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195 | * is extracted from a remote thread queue (i.e. it's proxy must |
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196 | * extracted from the remote queue). |
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197 | */ |
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198 | |
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199 | typedef void ( *Objects_Thread_queue_Extract_callout )( void * ); |
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200 | |
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201 | /* |
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202 | * The following defines the Object Control Block used to manage |
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203 | * each object local to this node. |
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204 | */ |
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205 | |
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206 | typedef struct { |
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207 | Chain_Node Node; |
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208 | Objects_Id id; |
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209 | Objects_Name name; |
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210 | } Objects_Control; |
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211 | |
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212 | /* |
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213 | * The following defines the structure for the information used to |
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214 | * manage each class of objects. |
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215 | */ |
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216 | |
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217 | typedef struct { |
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218 | Objects_APIs the_api; /* API of this object */ |
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219 | uint16_t the_class; /* class of this object */ |
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220 | Objects_Id minimum_id; /* minimum valid id of this type */ |
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221 | Objects_Id maximum_id; /* maximum valid id of this type */ |
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222 | Objects_Maximum maximum; /* maximum number of objects */ |
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223 | boolean auto_extend; /* TRUE if unlimited objects */ |
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224 | uint32_t allocation_size; /* number of objects in a block */ |
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225 | uint32_t size; /* size of the objects */ |
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226 | Objects_Control **local_table; |
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227 | Objects_Name *name_table; |
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228 | Chain_Control Inactive; /* chain of inactive ctl blocks */ |
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229 | Objects_Maximum inactive; /* number of objects on the InActive list */ |
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230 | uint32_t *inactive_per_block; /* used to release a block */ |
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231 | void **object_blocks; /* the object memory to remove */ |
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232 | boolean is_string; /* TRUE if names are strings */ |
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233 | uint16_t name_length; /* maximum length of names */ |
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234 | Objects_Thread_queue_Extract_callout extract; |
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235 | #if defined(RTEMS_MULTIPROCESSING) |
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236 | Chain_Control *global_table; /* pointer to global table */ |
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237 | #endif |
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238 | } Objects_Information; |
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239 | |
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240 | /* |
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241 | * The following defines the data storage which contains the |
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242 | * node number of the local node. |
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243 | */ |
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244 | |
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245 | #if defined(RTEMS_MULTIPROCESSING) |
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246 | SCORE_EXTERN uint16_t _Objects_Local_node; |
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247 | SCORE_EXTERN uint16_t _Objects_Maximum_nodes; |
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248 | #else |
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249 | #define _Objects_Local_node 1 |
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250 | #define _Objects_Maximum_nodes 1 |
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251 | #endif |
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252 | |
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253 | /* |
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254 | * The following is the list of information blocks per API for each object |
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255 | * class. From the ID, we can go to one of these information blocks, |
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256 | * and obtain a pointer to the appropriate object control block. |
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257 | */ |
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258 | |
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259 | SCORE_EXTERN Objects_Information |
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260 | **_Objects_Information_table[OBJECTS_APIS_LAST + 1]; |
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261 | |
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262 | /* |
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263 | * The following defines the constant which may be used |
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264 | * with _Objects_Get to manipulate the calling task. |
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265 | * |
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266 | */ |
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267 | |
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268 | #define OBJECTS_ID_OF_SELF ((Objects_Id) 0) |
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269 | |
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270 | /* |
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271 | * The following define the constants which may be used in name searches. |
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272 | */ |
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273 | |
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274 | #define OBJECTS_SEARCH_ALL_NODES 0 |
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275 | #define OBJECTS_SEARCH_OTHER_NODES 0x7FFFFFFE |
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276 | #define OBJECTS_SEARCH_LOCAL_NODE 0x7FFFFFFF |
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277 | #define OBJECTS_WHO_AM_I 0 |
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278 | |
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279 | /* |
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280 | * Parameters and return id's for _Objects_Get_next |
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281 | */ |
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282 | |
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283 | #define OBJECTS_ID_INITIAL_INDEX (0) |
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284 | #define OBJECTS_ID_FINAL_INDEX (0xffff) |
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285 | |
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286 | #define OBJECTS_ID_INITIAL(_api, _class, _node) \ |
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287 | _Objects_Build_id( (_api), (_class), (_node), OBJECTS_ID_INITIAL_INDEX ) |
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288 | #define OBJECTS_ID_FINAL ((Objects_Id)~0) |
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289 | |
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290 | /* |
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291 | * _Objects_Handler_initialization |
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292 | * |
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293 | * DESCRIPTION: |
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294 | * |
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295 | * This function performs the initialization necessary for this handler. |
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296 | * |
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297 | */ |
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298 | |
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299 | void _Objects_Handler_initialization( |
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300 | uint32_t node, |
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301 | uint32_t maximum_nodes, |
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302 | uint32_t maximum_global_objects |
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303 | ); |
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304 | |
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305 | /* |
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306 | * _Objects_Extend_information |
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307 | * |
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308 | * DESCRIPTION: |
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309 | * |
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310 | * This function extends an object class information record. |
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311 | */ |
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312 | |
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313 | void _Objects_Extend_information( |
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314 | Objects_Information *information |
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315 | ); |
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316 | |
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317 | /* |
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318 | * _Objects_Shrink_information |
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319 | * |
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320 | * DESCRIPTION: |
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321 | * |
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322 | * This function shrink an object class information record. |
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323 | */ |
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324 | |
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325 | void _Objects_Shrink_information( |
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326 | Objects_Information *information |
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327 | ); |
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328 | |
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329 | /* |
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330 | * _Objects_Initialize_information |
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331 | * |
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332 | * DESCRIPTION: |
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333 | * |
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334 | * This function initializes an object class information record. |
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335 | * SUPPORTS_GLOBAL is TRUE if the object class supports global |
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336 | * objects, and FALSE otherwise. Maximum indicates the number |
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337 | * of objects required in this class and size indicates the size |
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338 | * in bytes of each control block for this object class. The |
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339 | * name length and string designator are also set. In addition, |
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340 | * the class may be a task, therefore this information is also included. |
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341 | */ |
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342 | |
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343 | void _Objects_Initialize_information ( |
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344 | Objects_Information *information, |
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345 | Objects_APIs the_api, |
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346 | uint32_t the_class, |
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347 | Objects_Maximum maximum, |
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348 | uint16_t size, |
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349 | boolean is_string, |
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350 | uint32_t maximum_name_length |
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351 | #if defined(RTEMS_MULTIPROCESSING) |
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352 | , |
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353 | boolean supports_global, |
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354 | Objects_Thread_queue_Extract_callout extract |
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355 | #endif |
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356 | ); |
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357 | |
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358 | /*PAGE |
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359 | * |
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360 | * _Objects_Allocate |
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361 | * |
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362 | * DESCRIPTION: |
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363 | * |
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364 | * This function allocates a object control block from |
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365 | * the inactive chain of free object control blocks. |
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366 | */ |
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367 | |
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368 | Objects_Control *_Objects_Allocate( |
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369 | Objects_Information *information |
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370 | ); |
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371 | |
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372 | /* |
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373 | * _Objects_Allocate_by_index |
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374 | * |
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375 | * DESCRIPTION: |
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376 | * |
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377 | * This function allocates the object control block |
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378 | * specified by the index from the inactive chain of |
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379 | * free object control blocks. |
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380 | */ |
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381 | |
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382 | Objects_Control *_Objects_Allocate_by_index( |
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383 | Objects_Information *information, |
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384 | uint16_t index, |
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385 | uint16_t sizeof_control |
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386 | ); |
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387 | |
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388 | /*PAGE |
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389 | * |
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390 | * _Objects_Free |
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391 | * |
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392 | * DESCRIPTION: |
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393 | * |
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394 | * This function frees a object control block to the |
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395 | * inactive chain of free object control blocks. |
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396 | */ |
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397 | |
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398 | void _Objects_Free( |
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399 | Objects_Information *information, |
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400 | Objects_Control *the_object |
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401 | ); |
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402 | |
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403 | /* |
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404 | * _Objects_Clear_name |
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405 | * |
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406 | * DESCRIPTION: |
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407 | * |
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408 | * This method zeroes out the name. |
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409 | */ |
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410 | |
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411 | void _Objects_Clear_name( |
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412 | void *name, |
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413 | uint16_t length |
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414 | ); |
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415 | |
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416 | /* |
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417 | * _Objects_Copy_name_string |
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418 | * |
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419 | * DESCRIPTION: |
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420 | * |
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421 | * This method copies a string style object name from source to destination. |
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422 | */ |
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423 | |
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424 | void _Objects_Copy_name_string( |
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425 | void *source, |
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426 | void *destination, |
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427 | uint16_t length |
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428 | ); |
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429 | |
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430 | /* |
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431 | * _Objects_Copy_name_raw |
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432 | * |
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433 | * DESCRIPTION: |
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434 | * |
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435 | * This method copies a raw style object name from source to destination. |
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436 | */ |
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437 | |
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438 | void _Objects_Copy_name_raw( |
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439 | void *source, |
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440 | void *destination, |
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441 | uint16_t length |
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442 | ); |
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443 | |
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444 | /* |
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445 | * _Objects_Compare_name_string |
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446 | * |
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447 | * DESCRIPTION: |
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448 | * |
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449 | * This method compares two string style object names. |
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450 | */ |
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451 | |
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452 | boolean _Objects_Compare_name_string( |
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453 | void *name_1, |
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454 | void *name_2, |
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455 | uint16_t length |
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456 | ); |
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457 | |
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458 | /* |
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459 | * _Objects_Compare_name_raw |
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460 | * |
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461 | * DESCRIPTION: |
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462 | * |
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463 | * This method compares two raw style object names. |
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464 | */ |
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465 | |
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466 | boolean _Objects_Compare_name_raw( |
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467 | void *name_1, |
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468 | void *name_2, |
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469 | uint16_t length |
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470 | ); |
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471 | |
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472 | /* |
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473 | * _Objects_Name_to_id |
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474 | * |
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475 | * DESCRIPTION: |
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476 | * |
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477 | * This function implements the common portion of the object |
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478 | * identification directives. This directive returns the object |
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479 | * id associated with name. If more than one object of this class |
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480 | * is named name, then the object to which the id belongs is |
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481 | * arbitrary. Node indicates the extent of the search for the |
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482 | * id of the object named name. If the object class supports global |
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483 | * objects, then the search can be limited to a particular node |
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484 | * or allowed to encompass all nodes. |
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485 | * |
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486 | */ |
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487 | |
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488 | typedef enum { |
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489 | OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL, |
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490 | OBJECTS_INVALID_NAME, |
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491 | OBJECTS_INVALID_ADDRESS, |
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492 | OBJECTS_INVALID_ID, |
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493 | OBJECTS_INVALID_NODE |
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494 | } Objects_Name_or_id_lookup_errors; |
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495 | |
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496 | #define OBJECTS_NAME_ERRORS_FIRST OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL |
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497 | #define OBJECTS_NAME_ERRORS_LAST OBJECTS_INVALID_NODE |
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498 | |
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499 | Objects_Name_or_id_lookup_errors _Objects_Name_to_id( |
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500 | Objects_Information *information, |
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501 | Objects_Name name, |
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502 | uint32_t node, |
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503 | Objects_Id *id |
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504 | ); |
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505 | |
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506 | /* |
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507 | * _Objects_Id_to_Name |
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508 | * |
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509 | * DESCRIPTION: |
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510 | * |
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511 | * This function implements the common portion of the object Id |
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512 | * to name directives. This function returns the name |
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513 | * associated with object id. |
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514 | * |
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515 | * NOTE: |
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516 | * |
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517 | * This function currently does not support string names. |
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518 | */ |
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519 | |
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520 | Objects_Name_or_id_lookup_errors _Objects_Id_to_name ( |
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521 | Objects_Id id, |
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522 | Objects_Name *name |
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523 | ); |
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524 | |
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525 | /* |
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526 | * _Objects_Get |
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527 | * |
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528 | * DESCRIPTION: |
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529 | * |
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530 | * This function maps object ids to object control blocks. |
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531 | * If id corresponds to a local object, then it returns |
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532 | * the_object control pointer which maps to id and location |
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533 | * is set to OBJECTS_LOCAL. If the object class supports global |
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534 | * objects and the object id is global and resides on a remote |
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535 | * node, then location is set to OBJECTS_REMOTE, and the_object |
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536 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
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537 | * and the_object is undefined. |
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538 | * |
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539 | * NOTE: _Objects_Get returns with dispatching disabled for |
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540 | * local and remote objects. |
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541 | * _Objects_Get_isr_disable returns with dispatching |
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542 | * disabled for remote objects and interrupts for local |
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543 | * objects. |
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544 | */ |
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545 | |
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546 | Objects_Control *_Objects_Get ( |
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547 | Objects_Information *information, |
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548 | Objects_Id id, |
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549 | Objects_Locations *location |
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550 | ); |
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551 | |
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552 | Objects_Control *_Objects_Get_isr_disable( |
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553 | Objects_Information *information, |
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554 | Objects_Id id, |
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555 | Objects_Locations *location, |
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556 | ISR_Level *level |
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557 | ); |
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558 | |
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559 | Objects_Control *_Objects_Get_by_index ( |
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560 | Objects_Information *information, |
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561 | Objects_Id id, |
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562 | Objects_Locations *location |
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563 | ); |
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564 | |
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565 | Objects_Control *_Objects_Get_no_protection( |
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566 | Objects_Information *information, |
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567 | Objects_Id id, |
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568 | Objects_Locations *location |
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569 | ); |
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570 | |
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571 | /* |
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572 | * _Objects_Get_next |
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573 | * |
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574 | * DESCRIPTION: |
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575 | * |
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576 | * Like _Objects_Get, but is used to find "next" open object. |
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577 | * |
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578 | */ |
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579 | |
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580 | Objects_Control *_Objects_Get_next( |
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581 | Objects_Information *information, |
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582 | Objects_Id id, |
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583 | Objects_Locations *location_p, |
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584 | Objects_Id *next_id_p |
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585 | ); |
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586 | |
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587 | /* |
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588 | * Pieces of object.inl are promoted out to the user |
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589 | */ |
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590 | |
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591 | #include <rtems/score/object.inl> |
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592 | #if defined(RTEMS_MULTIPROCESSING) |
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593 | #include <rtems/score/objectmp.h> |
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594 | #endif |
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595 | |
---|
596 | #ifdef __cplusplus |
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597 | } |
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598 | #endif |
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599 | |
---|
600 | #endif |
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601 | /* end of include file */ |
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