1 | /* object.h |
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2 | * |
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3 | * This include file contains all the constants and structures associated |
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4 | * with the Object Handler. This Handler provides mechanisms which |
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5 | * can be used to initialize and manipulate all objects which have |
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6 | * ids. |
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7 | * |
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8 | * COPYRIGHT (c) 1989-1998. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * Copyright assigned to U.S. Government, 1994. |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.OARcorp.com/rtems/license.html. |
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15 | * |
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16 | * $Id$ |
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17 | */ |
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18 | |
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19 | #ifndef __OBJECTS_h |
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20 | #define __OBJECTS_h |
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21 | |
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22 | #ifdef __cplusplus |
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23 | extern "C" { |
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24 | #endif |
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25 | |
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26 | #include <rtems/score/chain.h> |
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27 | |
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28 | /* |
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29 | * The following type defines the control block used to manage |
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30 | * object names. |
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31 | */ |
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32 | |
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33 | typedef void * Objects_Name; |
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34 | |
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35 | /* |
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36 | * Space for object names is allocated in multiples of this. |
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37 | * |
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38 | * NOTE: Must be a power of 2. Matches the name manipulation routines. |
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39 | */ |
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40 | |
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41 | #define OBJECTS_NAME_ALIGNMENT sizeof( unsigned32 ) |
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42 | |
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43 | /* |
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44 | * Functions which compare names are prototyped like this. |
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45 | */ |
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46 | |
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47 | typedef boolean (*Objects_Name_comparators)( |
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48 | void * /* name_1 */, |
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49 | void * /* name_2 */, |
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50 | unsigned32 /* length */ |
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51 | ); |
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52 | |
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53 | /* |
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54 | * The following type defines the control block used to manage |
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55 | * object IDs. The format is as follows (0=LSB): |
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56 | * |
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57 | * Bits 0 .. 15 = index |
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58 | * Bits 16 .. 25 = node |
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59 | * Bits 26 .. 31 = class |
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60 | */ |
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61 | |
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62 | typedef unsigned32 Objects_Id; |
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63 | |
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64 | #define OBJECTS_INDEX_START_BIT 0 |
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65 | #define OBJECTS_NODE_START_BIT 16 |
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66 | #define OBJECTS_CLASS_START_BIT 26 |
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67 | |
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68 | #define OBJECTS_INDEX_MASK 0x0000ffff |
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69 | #define OBJECTS_NODE_MASK 0x03ff0000 |
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70 | #define OBJECTS_CLASS_MASK 0xfc000000 |
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71 | |
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72 | #define OBJECTS_INDEX_VALID_BITS 0x0000ffff |
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73 | #define OBJECTS_NODE_VALID_BITS 0x000003ff |
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74 | #define OBJECTS_CLASS_VALID_BITS 0x000000cf |
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75 | |
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76 | /* |
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77 | * This enumerated type is used in the class field of the object ID. |
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78 | */ |
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79 | |
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80 | typedef enum { |
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81 | OBJECTS_NO_CLASS = 0, |
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82 | OBJECTS_INTERNAL_THREADS = 1, |
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83 | OBJECTS_RTEMS_TASKS = 2, |
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84 | OBJECTS_POSIX_THREADS = 3, |
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85 | OBJECTS_RTEMS_TIMERS = 4, |
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86 | OBJECTS_RTEMS_SEMAPHORES = 5, |
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87 | OBJECTS_RTEMS_MESSAGE_QUEUES = 6, |
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88 | OBJECTS_RTEMS_PARTITIONS = 7, |
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89 | OBJECTS_RTEMS_REGIONS = 8, |
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90 | OBJECTS_RTEMS_PORTS = 9, |
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91 | OBJECTS_RTEMS_PERIODS = 10, |
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92 | OBJECTS_RTEMS_EXTENSIONS = 11, |
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93 | OBJECTS_POSIX_KEYS = 12, |
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94 | OBJECTS_POSIX_INTERRUPTS = 13, |
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95 | OBJECTS_POSIX_MESSAGE_QUEUES = 14, |
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96 | OBJECTS_POSIX_MUTEXES = 15, |
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97 | OBJECTS_POSIX_SEMAPHORES = 16, |
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98 | OBJECTS_POSIX_CONDITION_VARIABLES = 17 |
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99 | } Objects_Classes; |
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100 | |
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101 | #define OBJECTS_CLASSES_FIRST OBJECTS_NO_CLASS |
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102 | #define OBJECTS_CLASSES_LAST OBJECTS_POSIX_CONDITION_VARIABLES |
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103 | #define OBJECTS_CLASSES_FIRST_THREAD_CLASS OBJECTS_INTERNAL_THREADS |
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104 | #define OBJECTS_CLASSES_LAST_THREAD_CLASS OBJECTS_POSIX_THREADS |
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105 | |
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106 | /* |
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107 | * This enumerated type lists the locations which may be returned |
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108 | * by _Objects_Get. These codes indicate the success of locating |
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109 | * an object with the specified ID. |
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110 | */ |
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111 | |
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112 | typedef enum { |
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113 | OBJECTS_LOCAL = 0, /* object is local */ |
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114 | OBJECTS_REMOTE = 1, /* object is remote */ |
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115 | OBJECTS_ERROR = 2 /* id was invalid */ |
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116 | } Objects_Locations; |
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117 | |
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118 | /* |
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119 | * The following defines the Object Control Block used to manage |
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120 | * each object local to this node. |
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121 | */ |
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122 | |
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123 | typedef struct { |
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124 | Chain_Node Node; |
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125 | Objects_Id id; |
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126 | Objects_Name name; |
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127 | } Objects_Control; |
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128 | |
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129 | /* |
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130 | * The following defines the structure for the information used to |
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131 | * manage each class of objects. |
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132 | */ |
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133 | |
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134 | typedef struct { |
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135 | Objects_Classes the_class; /* Class of this object */ |
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136 | Objects_Id minimum_id; /* minimum valid id of this type */ |
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137 | Objects_Id maximum_id; /* maximum valid id of this type */ |
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138 | unsigned32 maximum; /* maximum number of objects */ |
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139 | Objects_Control **local_table; /* table of local object pointers */ |
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140 | Objects_Name *name_table; /* table of local object names */ |
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141 | Chain_Control *global_table; /* pointer to global table */ |
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142 | Chain_Control Inactive; /* chain of inactive ctl blocks */ |
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143 | boolean is_string; /* TRUE if names are strings */ |
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144 | unsigned32 name_length; /* maximum length of names */ |
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145 | boolean is_thread; /* TRUE if these are threads */ |
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146 | /* irregardless of API */ |
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147 | } Objects_Information; |
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148 | |
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149 | /* |
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150 | * The following defines the data storage which contains the |
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151 | * node number of the local node. |
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152 | */ |
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153 | |
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154 | SCORE_EXTERN unsigned32 _Objects_Local_node; |
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155 | SCORE_EXTERN unsigned32 _Objects_Maximum_nodes; |
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156 | |
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157 | /* |
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158 | * The following is the list of information blocks for each object |
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159 | * class. From the ID, we can go to one of these information blocks, |
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160 | * and obtain a pointer to the appropriate object control block. |
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161 | */ |
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162 | |
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163 | SCORE_EXTERN Objects_Information |
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164 | *_Objects_Information_table[OBJECTS_CLASSES_LAST + 1]; |
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165 | |
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166 | /* |
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167 | * The following defines the constant which may be used |
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168 | * with _Objects_Get to manipulate the calling task. |
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169 | * |
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170 | */ |
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171 | |
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172 | #define OBJECTS_ID_OF_SELF ((Objects_Id) 0) |
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173 | |
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174 | /* |
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175 | * The following define the constants which may be used in name searches. |
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176 | */ |
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177 | |
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178 | #define OBJECTS_SEARCH_ALL_NODES 0 |
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179 | #define OBJECTS_SEARCH_OTHER_NODES 0x7FFFFFFE |
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180 | #define OBJECTS_SEARCH_LOCAL_NODE 0x7FFFFFFF |
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181 | #define OBJECTS_WHO_AM_I 0 |
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182 | |
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183 | /* |
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184 | * Parameters and return id's for _Objects_Get_next |
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185 | */ |
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186 | |
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187 | #define OBJECTS_ID_INITIAL_INDEX (0) |
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188 | #define OBJECTS_ID_FINAL_INDEX (0xffff) |
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189 | |
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190 | #define OBJECTS_ID_INITIAL(_class, _node) \ |
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191 | _Objects_Build_id( (_class), (_node), OBJECTS_ID_INITIAL_INDEX ) |
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192 | |
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193 | #define OBJECTS_ID_FINAL ((Objects_Id)~0) |
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194 | |
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195 | /* |
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196 | * _Objects_Handler_initialization |
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197 | * |
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198 | * DESCRIPTION: |
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199 | * |
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200 | * This function performs the initialization necessary for this handler. |
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201 | * |
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202 | */ |
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203 | |
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204 | void _Objects_Handler_initialization( |
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205 | unsigned32 node, |
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206 | unsigned32 maximum_nodes, |
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207 | unsigned32 maximum_global_objects |
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208 | ); |
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209 | |
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210 | /* |
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211 | * _Objects_Initialize_information |
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212 | * |
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213 | * DESCRIPTION: |
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214 | * |
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215 | * This function initializes an object class information record. |
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216 | * SUPPORTS_GLOBAL is TRUE if the object class supports global |
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217 | * objects, and FALSE otherwise. Maximum indicates the number |
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218 | * of objects required in this class and size indicates the size |
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219 | * in bytes of each control block for this object class. The |
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220 | * name length and string designator are also set. In addition, |
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221 | * the class may be a task, therefore this information is also included. |
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222 | */ |
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223 | |
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224 | void _Objects_Initialize_information ( |
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225 | Objects_Information *information, |
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226 | Objects_Classes the_class, |
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227 | boolean supports_global, |
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228 | unsigned32 maximum, |
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229 | unsigned32 size, |
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230 | boolean is_string, |
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231 | unsigned32 maximum_name_length, |
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232 | boolean is_task |
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233 | ); |
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234 | |
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235 | /* |
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236 | * _Objects_Clear_name |
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237 | * |
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238 | * DESCRIPTION: |
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239 | * |
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240 | * XXX |
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241 | */ |
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242 | |
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243 | void _Objects_Clear_name( |
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244 | void *name, |
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245 | unsigned32 length |
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246 | ); |
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247 | |
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248 | /* |
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249 | * _Objects_Copy_name_string |
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250 | * |
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251 | * DESCRIPTION: |
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252 | * |
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253 | * XXX |
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254 | */ |
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255 | |
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256 | void _Objects_Copy_name_string( |
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257 | void *source, |
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258 | void *destination |
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259 | ); |
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260 | |
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261 | /* |
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262 | * _Objects_Copy_name_raw |
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263 | * |
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264 | * DESCRIPTION: |
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265 | * |
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266 | * XXX |
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267 | */ |
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268 | |
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269 | void _Objects_Copy_name_raw( |
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270 | void *source, |
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271 | void *destination, |
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272 | unsigned32 length |
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273 | ); |
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274 | |
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275 | /* |
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276 | * _Objects_Compare_name_string |
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277 | * |
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278 | * DESCRIPTION: |
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279 | * |
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280 | * XXX |
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281 | */ |
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282 | |
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283 | boolean _Objects_Compare_name_string( |
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284 | void *name_1, |
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285 | void *name_2, |
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286 | unsigned32 length |
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287 | ); |
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288 | |
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289 | /* |
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290 | * _Objects_Compare_name_raw |
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291 | * |
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292 | * DESCRIPTION: |
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293 | * |
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294 | * XXX |
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295 | */ |
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296 | |
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297 | boolean _Objects_Compare_name_raw( |
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298 | void *name_1, |
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299 | void *name_2, |
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300 | unsigned32 length |
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301 | ); |
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302 | /* |
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303 | * _Objects_Name_to_id |
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304 | * |
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305 | * DESCRIPTION: |
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306 | * |
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307 | * This function implements the common portion of the object |
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308 | * identification directives. This directive returns the object |
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309 | * id associated with name. If more than one object of this class |
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310 | * is named name, then the object to which the id belongs is |
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311 | * arbitrary. Node indicates the extent of the search for the |
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312 | * id of the object named name. If the object class supports global |
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313 | * objects, then the search can be limited to a particular node |
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314 | * or allowed to encompass all nodes. |
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315 | * |
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316 | */ |
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317 | |
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318 | typedef enum { |
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319 | OBJECTS_SUCCESSFUL, |
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320 | OBJECTS_INVALID_NAME, |
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321 | OBJECTS_INVALID_NODE |
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322 | } Objects_Name_to_id_errors; |
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323 | |
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324 | #define OBJECTS_NAME_ERRORS_FIRST OBJECTS_SUCCESSFUL |
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325 | #define OBJECTS_NAME_ERRORS_LAST OBJECTS_INVALID_NODE |
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326 | |
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327 | Objects_Name_to_id_errors _Objects_Name_to_id( |
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328 | Objects_Information *information, |
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329 | Objects_Name name, |
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330 | unsigned32 node, |
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331 | Objects_Id *id |
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332 | ); |
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333 | |
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334 | /* |
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335 | * _Objects_Get |
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336 | * |
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337 | * DESCRIPTION: |
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338 | * |
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339 | * This function maps object ids to object control blocks. |
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340 | * If id corresponds to a local object, then it returns |
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341 | * the_object control pointer which maps to id and location |
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342 | * is set to OBJECTS_LOCAL. If the object class supports global |
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343 | * objects and the object id is global and resides on a remote |
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344 | * node, then location is set to OBJECTS_REMOTE, and the_object |
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345 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
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346 | * and the_object is undefined. |
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347 | * |
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348 | */ |
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349 | |
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350 | Objects_Control *_Objects_Get ( |
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351 | Objects_Information *information, |
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352 | Objects_Id id, |
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353 | Objects_Locations *location |
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354 | ); |
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355 | |
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356 | /* |
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357 | * _Objects_Get_next |
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358 | * |
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359 | * DESCRIPTION: |
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360 | * |
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361 | * Like _Objects_Get, but is used to find "next" open object. |
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362 | * |
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363 | */ |
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364 | |
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365 | Objects_Control *_Objects_Get_next( |
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366 | Objects_Information *information, |
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367 | Objects_Id id, |
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368 | Objects_Locations *location_p, |
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369 | Objects_Id *next_id_p |
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370 | ); |
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371 | |
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372 | /* |
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373 | * _Objects_Get_information |
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374 | * |
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375 | * DESCRIPTION: |
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376 | * |
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377 | * Returns the information control block for the class of objects |
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378 | * corresponding to this id. |
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379 | */ |
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380 | |
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381 | Objects_Information *_Objects_Get_information( |
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382 | Objects_Id id |
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383 | ); |
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384 | |
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385 | /* |
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386 | * Pieces of object.inl are promoted out to the user |
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387 | */ |
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388 | |
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389 | #include <rtems/score/object.inl> |
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390 | #if defined(RTEMS_MULTIPROCESSING) |
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391 | #include <rtems/score/objectmp.h> |
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392 | #endif |
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393 | |
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394 | #ifdef __cplusplus |
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395 | } |
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396 | #endif |
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397 | |
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398 | #endif |
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399 | /* end of include file */ |
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