1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Inlined Routines in the Object Handler |
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5 | * |
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6 | * This include file contains the static inline implementation of all |
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7 | * of the inlined routines in the Object Handler. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 1989-2011. |
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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.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifndef _RTEMS_SCORE_OBJECTIMPL_H |
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20 | #define _RTEMS_SCORE_OBJECTIMPL_H |
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21 | |
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22 | #include <rtems/score/object.h> |
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23 | #include <rtems/score/apimutex.h> |
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24 | #include <rtems/score/isrlock.h> |
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25 | #include <rtems/score/threaddispatch.h> |
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26 | |
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27 | #ifdef __cplusplus |
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28 | extern "C" { |
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29 | #endif |
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30 | |
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31 | /** |
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32 | * @addtogroup ScoreObject |
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33 | * |
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34 | * @{ |
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35 | */ |
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36 | |
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37 | /** |
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38 | * Functions which compare names are prototyped like this. |
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39 | */ |
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40 | typedef bool (*Objects_Name_comparators)( |
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41 | void * /* name_1 */, |
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42 | void * /* name_2 */, |
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43 | uint16_t /* length */ |
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44 | ); |
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45 | |
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46 | /** |
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47 | * This enumerated type is used in the class field of the object ID |
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48 | * for RTEMS internal object classes. |
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49 | */ |
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50 | typedef enum { |
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51 | OBJECTS_INTERNAL_NO_CLASS = 0, |
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52 | OBJECTS_INTERNAL_THREADS = 1, |
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53 | OBJECTS_INTERNAL_MUTEXES = 2 |
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54 | } Objects_Internal_API; |
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55 | |
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56 | /** This macro is used to generically specify the last API index. */ |
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57 | #define OBJECTS_INTERNAL_CLASSES_LAST OBJECTS_INTERNAL_MUTEXES |
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58 | |
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59 | /** |
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60 | * This enumerated type is used in the class field of the object ID |
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61 | * for the RTEMS Classic API. |
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62 | */ |
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63 | typedef enum { |
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64 | OBJECTS_CLASSIC_NO_CLASS = 0, |
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65 | OBJECTS_RTEMS_TASKS = 1, |
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66 | OBJECTS_RTEMS_TIMERS = 2, |
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67 | OBJECTS_RTEMS_SEMAPHORES = 3, |
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68 | OBJECTS_RTEMS_MESSAGE_QUEUES = 4, |
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69 | OBJECTS_RTEMS_PARTITIONS = 5, |
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70 | OBJECTS_RTEMS_REGIONS = 6, |
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71 | OBJECTS_RTEMS_PORTS = 7, |
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72 | OBJECTS_RTEMS_PERIODS = 8, |
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73 | OBJECTS_RTEMS_EXTENSIONS = 9, |
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74 | OBJECTS_RTEMS_BARRIERS = 10 |
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75 | } Objects_Classic_API; |
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76 | |
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77 | /** This macro is used to generically specify the last API index. */ |
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78 | #define OBJECTS_RTEMS_CLASSES_LAST OBJECTS_RTEMS_BARRIERS |
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79 | |
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80 | /** |
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81 | * This enumerated type is used in the class field of the object ID |
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82 | * for the POSIX API. |
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83 | */ |
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84 | typedef enum { |
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85 | OBJECTS_POSIX_NO_CLASS = 0, |
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86 | OBJECTS_POSIX_THREADS = 1, |
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87 | OBJECTS_POSIX_KEYS = 2, |
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88 | OBJECTS_POSIX_INTERRUPTS = 3, |
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89 | OBJECTS_POSIX_MESSAGE_QUEUE_FDS = 4, |
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90 | OBJECTS_POSIX_MESSAGE_QUEUES = 5, |
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91 | OBJECTS_POSIX_MUTEXES = 6, |
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92 | OBJECTS_POSIX_SEMAPHORES = 7, |
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93 | OBJECTS_POSIX_CONDITION_VARIABLES = 8, |
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94 | OBJECTS_POSIX_TIMERS = 9, |
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95 | OBJECTS_POSIX_BARRIERS = 10, |
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96 | OBJECTS_POSIX_SPINLOCKS = 11, |
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97 | OBJECTS_POSIX_RWLOCKS = 12 |
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98 | } Objects_POSIX_API; |
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99 | |
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100 | /** This macro is used to generically specify the last API index. */ |
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101 | #define OBJECTS_POSIX_CLASSES_LAST OBJECTS_POSIX_RWLOCKS |
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102 | |
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103 | /* |
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104 | * For fake objects, which have an object identifier, but no objects |
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105 | * information block. |
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106 | */ |
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107 | typedef enum { |
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108 | OBJECTS_FAKE_OBJECTS_NO_CLASS = 0, |
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109 | OBJECTS_FAKE_OBJECTS_SCHEDULERS = 1 |
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110 | } Objects_Fake_objects_API; |
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111 | |
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112 | /** |
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113 | * This enumerated type lists the locations which may be returned |
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114 | * by _Objects_Get. These codes indicate the success of locating |
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115 | * an object with the specified ID. |
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116 | */ |
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117 | typedef enum { |
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118 | #if defined(RTEMS_MULTIPROCESSING) |
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119 | OBJECTS_REMOTE = 2, /* object is remote */ |
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120 | #endif |
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121 | OBJECTS_LOCAL = 0, /* object is local */ |
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122 | OBJECTS_ERROR = 1 /* id was invalid */ |
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123 | } Objects_Locations; |
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124 | |
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125 | /** |
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126 | * The following type defines the callout used when a local task |
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127 | * is extracted from a remote thread queue (i.e. it's proxy must |
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128 | * extracted from the remote queue). |
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129 | */ |
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130 | typedef void ( *Objects_Thread_queue_Extract_callout )( void * ); |
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131 | |
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132 | /** |
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133 | * The following defines the structure for the information used to |
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134 | * manage each class of objects. |
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135 | */ |
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136 | typedef struct { |
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137 | /** This field indicates the API of this object class. */ |
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138 | Objects_APIs the_api; |
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139 | /** This is the class of this object set. */ |
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140 | uint16_t the_class; |
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141 | /** This is the minimum valid id of this object class. */ |
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142 | Objects_Id minimum_id; |
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143 | /** This is the maximum valid id of this object class. */ |
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144 | Objects_Id maximum_id; |
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145 | /** This is the maximum number of objects in this class. */ |
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146 | Objects_Maximum maximum; |
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147 | /** This is the true if unlimited objects in this class. */ |
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148 | bool auto_extend; |
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149 | /** This is the number of objects in a block. */ |
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150 | Objects_Maximum allocation_size; |
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151 | /** This is the size in bytes of each object instance. */ |
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152 | size_t size; |
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153 | /** This points to the table of local objects. */ |
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154 | Objects_Control **local_table; |
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155 | /** This is the chain of inactive control blocks. */ |
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156 | Chain_Control Inactive; |
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157 | /** This is the number of objects on the Inactive list. */ |
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158 | Objects_Maximum inactive; |
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159 | /** This is the number of inactive objects per block. */ |
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160 | uint32_t *inactive_per_block; |
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161 | /** This is a table to the chain of inactive object memory blocks. */ |
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162 | void **object_blocks; |
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163 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
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164 | /** This is true if names are strings. */ |
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165 | bool is_string; |
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166 | #endif |
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167 | /** This is the maximum length of names. */ |
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168 | uint16_t name_length; |
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169 | #if defined(RTEMS_MULTIPROCESSING) |
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170 | /** This is this object class' method called when extracting a thread. */ |
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171 | Objects_Thread_queue_Extract_callout extract; |
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172 | /** This is this object class' pointer to the global name table */ |
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173 | Chain_Control *global_table; |
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174 | #endif |
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175 | } Objects_Information; |
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176 | |
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177 | /** |
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178 | * The following is referenced to the node number of the local node. |
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179 | */ |
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180 | #if defined(RTEMS_MULTIPROCESSING) |
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181 | extern uint16_t _Objects_Local_node; |
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182 | #else |
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183 | #define _Objects_Local_node ((uint16_t)1) |
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184 | #endif |
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185 | |
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186 | /** |
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187 | * The following is referenced to the number of nodes in the system. |
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188 | */ |
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189 | #if defined(RTEMS_MULTIPROCESSING) |
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190 | extern uint16_t _Objects_Maximum_nodes; |
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191 | #else |
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192 | #define _Objects_Maximum_nodes 1 |
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193 | #endif |
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194 | |
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195 | /** |
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196 | * The following is the list of information blocks per API for each object |
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197 | * class. From the ID, we can go to one of these information blocks, |
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198 | * and obtain a pointer to the appropriate object control block. |
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199 | */ |
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200 | extern Objects_Information |
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201 | **_Objects_Information_table[OBJECTS_APIS_LAST + 1]; |
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202 | |
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203 | /** |
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204 | * This function extends an object class information record. |
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205 | * |
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206 | * @param[in] information points to an object class information block. |
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207 | */ |
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208 | void _Objects_Extend_information( |
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209 | Objects_Information *information |
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210 | ); |
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211 | |
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212 | /** |
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213 | * @brief Shrink an object class information record |
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214 | * |
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215 | * This function shrink an object class information record. |
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216 | * The object's name and object space are released. The local_table |
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217 | * etc block does not shrink. The InActive list needs to be scanned |
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218 | * to find the objects are remove them. |
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219 | * |
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220 | * @param[in] information points to an object class information block. |
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221 | */ |
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222 | void _Objects_Shrink_information( |
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223 | Objects_Information *information |
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224 | ); |
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225 | |
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226 | /** |
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227 | * @brief Initialize object Information |
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228 | * |
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229 | * This function initializes an object class information record. |
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230 | * SUPPORTS_GLOBAL is true if the object class supports global |
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231 | * objects, and false otherwise. Maximum indicates the number |
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232 | * of objects required in this class and size indicates the size |
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233 | * in bytes of each control block for this object class. The |
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234 | * name length and string designator are also set. In addition, |
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235 | * the class may be a task, therefore this information is also included. |
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236 | * |
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237 | * @param[in] information points to an object class information block. |
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238 | * @param[in] the_api indicates the API associated with this information block. |
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239 | * @param[in] the_class indicates the class of object being managed |
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240 | * by this information block. It is specific to @a the_api. |
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241 | * @param[in] maximum is the maximum number of instances of this object |
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242 | * class which may be concurrently active. |
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243 | * @param[in] size is the size of the data structure for this class. |
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244 | * @param[in] is_string is true if this object uses string style names. |
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245 | * @param[in] maximum_name_length is the maximum length of object names. |
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246 | */ |
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247 | void _Objects_Initialize_information ( |
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248 | Objects_Information *information, |
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249 | Objects_APIs the_api, |
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250 | uint16_t the_class, |
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251 | uint32_t maximum, |
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252 | uint16_t size, |
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253 | bool is_string, |
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254 | uint32_t maximum_name_length |
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255 | #if defined(RTEMS_MULTIPROCESSING) |
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256 | , |
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257 | bool supports_global, |
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258 | Objects_Thread_queue_Extract_callout extract |
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259 | #endif |
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260 | ); |
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261 | |
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262 | /** |
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263 | * @brief Object API Maximum Class |
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264 | * |
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265 | * This function returns the highest numeric value of a valid |
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266 | * API for the specified @a api. |
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267 | * |
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268 | * @param[in] api is the API of interest |
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269 | * |
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270 | * @retval A positive integer on success and 0 otherwise. |
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271 | */ |
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272 | unsigned int _Objects_API_maximum_class( |
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273 | uint32_t api |
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274 | ); |
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275 | |
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276 | /** |
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277 | * @brief Allocates an object without locking the allocator mutex. |
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278 | * |
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279 | * This function can be called in two contexts |
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280 | * - the executing thread is the owner of the object allocator mutex, or |
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281 | * - in case the system state is not up, e.g. during sequential system |
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282 | * initialization. |
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283 | * |
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284 | * @param[in] information The object information block. |
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285 | * |
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286 | * @retval NULL No object available. |
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287 | * @retval object The allocated object. |
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288 | * |
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289 | * @see _Objects_Allocate() and _Objects_Free(). |
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290 | */ |
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291 | Objects_Control *_Objects_Allocate_unprotected( |
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292 | Objects_Information *information |
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293 | ); |
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294 | |
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295 | /** |
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296 | * @brief Allocates an object. |
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297 | * |
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298 | * This function locks the object allocator mutex via |
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299 | * _Objects_Allocator_lock(). The caller must later unlock the object |
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300 | * allocator mutex via _Objects_Allocator_unlock(). The caller must unlock the |
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301 | * mutex in any case, even if the allocation failed due to resource shortage. |
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302 | * |
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303 | * A typical object allocation code looks like this: |
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304 | * @code |
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305 | * rtems_status_code some_create( rtems_id *id ) |
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306 | * { |
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307 | * rtems_status_code sc; |
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308 | * Some_Control *some; |
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309 | * |
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310 | * // The object allocator mutex protects the executing thread from |
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311 | * // asynchronous thread restart and deletion. |
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312 | * some = (Some_Control *) _Objects_Allocate( &_Some_Information ); |
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313 | * |
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314 | * if ( some != NULL ) { |
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315 | * _Some_Initialize( some ); |
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316 | * sc = RTEMS_SUCCESSFUL; |
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317 | * } else { |
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318 | * sc = RTEMS_TOO_MANY; |
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319 | * } |
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320 | * |
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321 | * _Objects_Allocator_unlock(); |
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322 | * |
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323 | * return sc; |
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324 | * } |
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325 | * @endcode |
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326 | * |
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327 | * @param[in] information The object information block. |
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328 | * |
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329 | * @retval NULL No object available. |
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330 | * @retval object The allocated object. |
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331 | * |
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332 | * @see _Objects_Free(). |
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333 | */ |
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334 | Objects_Control *_Objects_Allocate( Objects_Information *information ); |
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335 | |
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336 | /** |
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337 | * @brief Frees an object. |
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338 | * |
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339 | * Appends the object to the chain of inactive objects. |
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340 | * |
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341 | * @param[in] information The object information block. |
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342 | * @param[in] the_object The object to free. |
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343 | * |
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344 | * @see _Objects_Allocate(). |
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345 | * |
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346 | * A typical object deletion code looks like this: |
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347 | * @code |
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348 | * rtems_status_code some_delete( rtems_id id ) |
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349 | * { |
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350 | * rtems_status_code sc; |
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351 | * Some_Control *some; |
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352 | * Objects_Locations location; |
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353 | * |
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354 | * // The object allocator mutex protects the executing thread from |
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355 | * // asynchronous thread restart and deletion. |
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356 | * _Objects_Allocator_lock(); |
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357 | * |
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358 | * // This will disable thread dispatching, so this starts a thread dispatch |
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359 | * // critical section. |
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360 | * some = (Semaphore_Control *) |
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361 | * _Objects_Get( &_Some_Information, id, &location ); |
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362 | * |
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363 | * switch ( location ) { |
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364 | * case OBJECTS_LOCAL: |
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365 | * // After the object close an object get with this identifier will |
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366 | * // fail. |
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367 | * _Objects_Close( &_Some_Information, &some->Object ); |
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368 | * |
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369 | * _Some_Delete( some ); |
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370 | * |
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371 | * // This enables thread dispatching, so the thread dispatch critical |
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372 | * // section ends here. |
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373 | * _Objects_Put( &some->Object ); |
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374 | * |
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375 | * // Thread dispatching is enabled. The object free is only protected |
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376 | * // by the object allocator mutex. |
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377 | * _Objects_Free( &_Some_Information, &some->Object ); |
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378 | * |
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379 | * sc = RTEMS_SUCCESSFUL; |
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380 | * break; |
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381 | * default: |
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382 | * sc = RTEMS_INVALID_ID; |
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383 | * break; |
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384 | * } |
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385 | * |
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386 | * _Objects_Allocator_unlock(); |
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387 | * |
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388 | * return sc; |
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389 | * } |
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390 | * @endcode |
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391 | */ |
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392 | void _Objects_Free( |
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393 | Objects_Information *information, |
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394 | Objects_Control *the_object |
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395 | ); |
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396 | |
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397 | /** |
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398 | * This function implements the common portion of the object |
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399 | * identification directives. This directive returns the object |
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400 | * id associated with name. If more than one object of this class |
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401 | * is named name, then the object to which the id belongs is |
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402 | * arbitrary. Node indicates the extent of the search for the |
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403 | * id of the object named name. If the object class supports global |
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404 | * objects, then the search can be limited to a particular node |
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405 | * or allowed to encompass all nodes. |
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406 | */ |
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407 | typedef enum { |
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408 | OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL, |
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409 | OBJECTS_INVALID_NAME, |
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410 | OBJECTS_INVALID_ADDRESS, |
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411 | OBJECTS_INVALID_ID, |
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412 | OBJECTS_INVALID_NODE |
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413 | } Objects_Name_or_id_lookup_errors; |
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414 | |
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415 | /** |
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416 | * This macro defines the first entry in the |
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417 | * @ref Objects_Name_or_id_lookup_errors enumerated list. |
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418 | */ |
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419 | #define OBJECTS_NAME_ERRORS_FIRST OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL |
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420 | |
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421 | /** |
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422 | * This macro defines the last entry in the |
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423 | * @ref Objects_Name_or_id_lookup_errors enumerated list. |
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424 | */ |
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425 | #define OBJECTS_NAME_ERRORS_LAST OBJECTS_INVALID_NODE |
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426 | |
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427 | /** |
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428 | * @brief Converts an object name to an Id. |
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429 | * |
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430 | * This method converts an object name to an Id. It performs a look up |
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431 | * using the object information block for this object class. |
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432 | * |
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433 | * @param[in] information points to an object class information block. |
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434 | * @param[in] name is the name of the object to find. |
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435 | * @param[in] node is the set of nodes to search. |
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436 | * @param[in] id will contain the Id if the search is successful. |
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437 | * |
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438 | * @retval This method returns one of the values from the |
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439 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
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440 | * successful or failure. On success @a id will contain the Id of |
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441 | * the requested object. |
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442 | */ |
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443 | Objects_Name_or_id_lookup_errors _Objects_Name_to_id_u32( |
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444 | Objects_Information *information, |
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445 | uint32_t name, |
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446 | uint32_t node, |
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447 | Objects_Id *id |
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448 | ); |
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449 | |
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450 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
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451 | /** |
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452 | * @brief Converts an object name to an Id. |
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453 | * |
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454 | * This method converts an object name to an Id. It performs a look up |
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455 | * using the object information block for this object class. |
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456 | * |
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457 | * @param[in] information points to an object class information block. |
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458 | * @param[in] name is the name of the object to find. |
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459 | * @param[in] id will contain the Id if the search is successful. |
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460 | * |
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461 | * @retval This method returns one of the values from the |
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462 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
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463 | * successful or failure. On success @a id will contain the Id of |
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464 | * the requested object. |
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465 | */ |
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466 | Objects_Name_or_id_lookup_errors _Objects_Name_to_id_string( |
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467 | Objects_Information *information, |
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468 | const char *name, |
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469 | Objects_Id *id |
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470 | ); |
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471 | #endif |
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472 | |
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473 | /** |
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474 | * @brief Implements the common portion of the object Id to name directives. |
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475 | * |
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476 | * This function implements the common portion of the object Id |
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477 | * to name directives. This function returns the name |
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478 | * associated with object id. |
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479 | * |
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480 | * @param[in] id is the Id of the object whose name we are locating. |
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481 | * @param[in] name will contain the name of the object, if found. |
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482 | * |
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483 | * @retval This method returns one of the values from the |
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484 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
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485 | * successful or failure. On success @a name will contain the name of |
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486 | * the requested object. |
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487 | * |
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488 | * @note This function currently does not support string names. |
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489 | */ |
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490 | Objects_Name_or_id_lookup_errors _Objects_Id_to_name ( |
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491 | Objects_Id id, |
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492 | Objects_Name *name |
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493 | ); |
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494 | |
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495 | /** |
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496 | * @brief Maps object ids to object control blocks. |
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497 | * |
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498 | * This function maps object ids to object control blocks. |
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499 | * If id corresponds to a local object, then it returns |
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500 | * the_object control pointer which maps to id and location |
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501 | * is set to OBJECTS_LOCAL. If the object class supports global |
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502 | * objects and the object id is global and resides on a remote |
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503 | * node, then location is set to OBJECTS_REMOTE, and the_object |
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504 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
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505 | * and the_object is undefined. |
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506 | * |
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507 | * @param[in] information points to an object class information block. |
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508 | * @param[in] id is the Id of the object whose name we are locating. |
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509 | * @param[in] location will contain an indication of success or failure. |
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510 | * |
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511 | * @retval This method returns one of the values from the |
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512 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
513 | * successful or failure. On success @a id will contain the Id of |
---|
514 | * the requested object. |
---|
515 | * |
---|
516 | * @note _Objects_Get returns with dispatching disabled for |
---|
517 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
518 | * dispatching disabled for remote objects and interrupts for local |
---|
519 | * objects. |
---|
520 | */ |
---|
521 | Objects_Control *_Objects_Get ( |
---|
522 | Objects_Information *information, |
---|
523 | Objects_Id id, |
---|
524 | Objects_Locations *location |
---|
525 | ); |
---|
526 | |
---|
527 | /** |
---|
528 | * @brief Maps object ids to object control blocks. |
---|
529 | * |
---|
530 | * This function maps object ids to object control blocks. |
---|
531 | * If id corresponds to a local object, then it returns |
---|
532 | * the_object control pointer which maps to id and location |
---|
533 | * is set to OBJECTS_LOCAL. If the object class supports global |
---|
534 | * objects and the object id is global and resides on a remote |
---|
535 | * node, then location is set to OBJECTS_REMOTE, and the_object |
---|
536 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
---|
537 | * and the_object is undefined. |
---|
538 | * |
---|
539 | * @param[in] information points to an object class information block. |
---|
540 | * @param[in] id is the Id of the object whose name we are locating. |
---|
541 | * @param[in] location will contain an indication of success or failure. |
---|
542 | * @param[in] lock_context is the previous interrupt state being turned. |
---|
543 | * |
---|
544 | * @retval This method returns one of the values from the |
---|
545 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
546 | * successful or failure. On success @a name will contain the name of |
---|
547 | * the requested object. |
---|
548 | * |
---|
549 | * @note _Objects_Get returns with dispatching disabled for |
---|
550 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
551 | * dispatchng disabled for remote objects and interrupts for local |
---|
552 | * objects. |
---|
553 | */ |
---|
554 | Objects_Control *_Objects_Get_isr_disable( |
---|
555 | Objects_Information *information, |
---|
556 | Objects_Id id, |
---|
557 | Objects_Locations *location, |
---|
558 | ISR_lock_Context *lock_context |
---|
559 | ); |
---|
560 | |
---|
561 | /** |
---|
562 | * @brief Maps the specified object identifier to the associated local object |
---|
563 | * control block. |
---|
564 | * |
---|
565 | * In this function interrupts are disabled during the object lookup. In case |
---|
566 | * an associated object exists, then interrupts remain disabled, otherwise the |
---|
567 | * previous interrupt state is restored. |
---|
568 | * |
---|
569 | * @param information The object class information block. |
---|
570 | * @param[in] id The object identifier. |
---|
571 | * @param[in] lock_context The interrupt lock context. |
---|
572 | * |
---|
573 | * @retval NULL No associated object exists. |
---|
574 | * @retval other The pointer to the associated object control block. |
---|
575 | * Interrupts are now disabled and must be restored using the specified lock |
---|
576 | * context via _ISR_lock_ISR_enable() or _ISR_lock_Release_and_ISR_enable(). |
---|
577 | */ |
---|
578 | Objects_Control *_Objects_Get_local( |
---|
579 | const Objects_Information *information, |
---|
580 | Objects_Id id, |
---|
581 | ISR_lock_Context *lock_context |
---|
582 | ); |
---|
583 | |
---|
584 | /** |
---|
585 | * @brief Maps object ids to object control blocks. |
---|
586 | * |
---|
587 | * This function maps object ids to object control blocks. |
---|
588 | * If id corresponds to a local object, then it returns |
---|
589 | * the_object control pointer which maps to id and location |
---|
590 | * is set to OBJECTS_LOCAL. If the object class supports global |
---|
591 | * objects and the object id is global and resides on a remote |
---|
592 | * node, then location is set to OBJECTS_REMOTE, and the_object |
---|
593 | * is undefined. Otherwise, location is set to OBJECTS_ERROR |
---|
594 | * and the_object is undefined. |
---|
595 | * |
---|
596 | * @param[in] information points to an object class information block. |
---|
597 | * @param[in] id is the Id of the object whose name we are locating. |
---|
598 | * @param[in] location will contain an indication of success or failure. |
---|
599 | * |
---|
600 | * @retval This method returns one of the values from the |
---|
601 | * @ref Objects_Name_or_id_lookup_errors enumeration to indicate |
---|
602 | * successful or failure. On success @a id will contain the Id of |
---|
603 | * the requested object. |
---|
604 | * |
---|
605 | * @note _Objects_Get returns with dispatching disabled for |
---|
606 | * local and remote objects. _Objects_Get_isr_disable returns with |
---|
607 | * dispatching disabled for remote objects and interrupts for local |
---|
608 | * objects. |
---|
609 | */ |
---|
610 | Objects_Control *_Objects_Get_no_protection( |
---|
611 | Objects_Information *information, |
---|
612 | Objects_Id id, |
---|
613 | Objects_Locations *location |
---|
614 | ); |
---|
615 | |
---|
616 | /** |
---|
617 | * Like @ref _Objects_Get, but is used to find "next" open object. |
---|
618 | * |
---|
619 | * @param[in] information points to an object class information block. |
---|
620 | * @param[in] id is the Id of the object whose name we are locating. |
---|
621 | * @param[in] location_p will contain an indication of success or failure. |
---|
622 | * @param[in] next_id_p is the Id of the next object we will look at. |
---|
623 | * |
---|
624 | * @retval This method returns the pointer to the object located or |
---|
625 | * NULL on error. |
---|
626 | */ |
---|
627 | Objects_Control *_Objects_Get_next( |
---|
628 | Objects_Information *information, |
---|
629 | Objects_Id id, |
---|
630 | Objects_Locations *location_p, |
---|
631 | Objects_Id *next_id_p |
---|
632 | ); |
---|
633 | |
---|
634 | /** |
---|
635 | * @brief Get object information. |
---|
636 | * |
---|
637 | * This function return the information structure given |
---|
638 | * an the API and Class. This can be done independent of |
---|
639 | * the existence of any objects created by the API. |
---|
640 | * |
---|
641 | * @param[in] the_api indicates the API for the information we want |
---|
642 | * @param[in] the_class indicates the Class for the information we want |
---|
643 | * |
---|
644 | * @retval This method returns a pointer to the Object Information Table |
---|
645 | * for the class of objects which corresponds to this object ID. |
---|
646 | */ |
---|
647 | Objects_Information *_Objects_Get_information( |
---|
648 | Objects_APIs the_api, |
---|
649 | uint16_t the_class |
---|
650 | ); |
---|
651 | |
---|
652 | /** |
---|
653 | * @brief Get information of an object from an ID. |
---|
654 | * |
---|
655 | * This function return the information structure given |
---|
656 | * an @a id of an object. |
---|
657 | * |
---|
658 | * @param[in] id is the object ID to get the information from |
---|
659 | * |
---|
660 | * @retval This method returns a pointer to the Object Information Table |
---|
661 | * for the class of objects which corresponds to this object ID. |
---|
662 | */ |
---|
663 | Objects_Information *_Objects_Get_information_id( |
---|
664 | Objects_Id id |
---|
665 | ); |
---|
666 | |
---|
667 | /** |
---|
668 | * @brief Gets object name in the form of a C string. |
---|
669 | * |
---|
670 | * This method objects the name of an object and returns its name |
---|
671 | * in the form of a C string. It attempts to be careful about |
---|
672 | * overflowing the user's string and about returning unprintable characters. |
---|
673 | * |
---|
674 | * @param[in] id is the object to obtain the name of |
---|
675 | * @param[in] length indicates the length of the caller's buffer |
---|
676 | * @param[in] name points a string which will be filled in. |
---|
677 | * |
---|
678 | * @retval This method returns @a name or NULL on error. @a *name will |
---|
679 | * contain the name if successful. |
---|
680 | */ |
---|
681 | char *_Objects_Get_name_as_string( |
---|
682 | Objects_Id id, |
---|
683 | size_t length, |
---|
684 | char *name |
---|
685 | ); |
---|
686 | |
---|
687 | /** |
---|
688 | * @brief Set objects name. |
---|
689 | * |
---|
690 | * This method sets the object name to either a copy of a string |
---|
691 | * or up to the first four characters of the string based upon |
---|
692 | * whether this object class uses strings for names. |
---|
693 | * |
---|
694 | * @param[in] information points to the object information structure |
---|
695 | * @param[in] the_object is the object to operate upon |
---|
696 | * @param[in] name is a pointer to the name to use |
---|
697 | * |
---|
698 | * @retval If successful, true is returned. Otherwise false is returned. |
---|
699 | */ |
---|
700 | bool _Objects_Set_name( |
---|
701 | Objects_Information *information, |
---|
702 | Objects_Control *the_object, |
---|
703 | const char *name |
---|
704 | ); |
---|
705 | |
---|
706 | /** |
---|
707 | * @brief Removes object from namespace. |
---|
708 | * |
---|
709 | * This function removes @a the_object from the namespace. |
---|
710 | * |
---|
711 | * @param[in] information points to an Object Information Table. |
---|
712 | * @param[in] the_object is a pointer to an object. |
---|
713 | */ |
---|
714 | void _Objects_Namespace_remove( |
---|
715 | Objects_Information *information, |
---|
716 | Objects_Control *the_object |
---|
717 | ); |
---|
718 | |
---|
719 | /** |
---|
720 | * @brief Close object. |
---|
721 | * |
---|
722 | * This function removes the_object control pointer and object name |
---|
723 | * in the Local Pointer and Local Name Tables. |
---|
724 | * |
---|
725 | * @param[in] information points to an Object Information Table |
---|
726 | * @param[in] the_object is a pointer to an object |
---|
727 | */ |
---|
728 | void _Objects_Close( |
---|
729 | Objects_Information *information, |
---|
730 | Objects_Control *the_object |
---|
731 | ); |
---|
732 | |
---|
733 | /** |
---|
734 | * @brief Returns the count of active objects. |
---|
735 | * |
---|
736 | * @param[in] information The object information table. |
---|
737 | * |
---|
738 | * @retval The count of active objects. |
---|
739 | */ |
---|
740 | Objects_Maximum _Objects_Active_count( |
---|
741 | const Objects_Information *information |
---|
742 | ); |
---|
743 | |
---|
744 | RTEMS_INLINE_ROUTINE Objects_Maximum _Objects_Extend_size( |
---|
745 | const Objects_Information *information |
---|
746 | ) |
---|
747 | { |
---|
748 | return information->auto_extend ? information->allocation_size : 0; |
---|
749 | } |
---|
750 | |
---|
751 | /** |
---|
752 | * This function returns true if the api is valid. |
---|
753 | * |
---|
754 | * @param[in] the_api is the api portion of an object ID. |
---|
755 | * |
---|
756 | * @return This method returns true if the specified api value is valid |
---|
757 | * and false otherwise. |
---|
758 | */ |
---|
759 | RTEMS_INLINE_ROUTINE bool _Objects_Is_api_valid( |
---|
760 | uint32_t the_api |
---|
761 | ) |
---|
762 | { |
---|
763 | if ( !the_api || the_api > OBJECTS_APIS_LAST ) |
---|
764 | return false; |
---|
765 | return true; |
---|
766 | } |
---|
767 | |
---|
768 | /** |
---|
769 | * This function returns true if the node is of the local object, and |
---|
770 | * false otherwise. |
---|
771 | * |
---|
772 | * @param[in] node is the node number and corresponds to the node number |
---|
773 | * portion of an object ID. |
---|
774 | * |
---|
775 | * @return This method returns true if the specified node is the local node |
---|
776 | * and false otherwise. |
---|
777 | */ |
---|
778 | RTEMS_INLINE_ROUTINE bool _Objects_Is_local_node( |
---|
779 | uint32_t node |
---|
780 | ) |
---|
781 | { |
---|
782 | return ( node == _Objects_Local_node ); |
---|
783 | } |
---|
784 | |
---|
785 | /** |
---|
786 | * This function returns true if the id is of a local object, and |
---|
787 | * false otherwise. |
---|
788 | * |
---|
789 | * @param[in] id is an object ID |
---|
790 | * |
---|
791 | * @return This method returns true if the specified object Id is local |
---|
792 | * and false otherwise. |
---|
793 | * |
---|
794 | * @note On a single processor configuration, this always returns true. |
---|
795 | */ |
---|
796 | RTEMS_INLINE_ROUTINE bool _Objects_Is_local_id( |
---|
797 | #if defined(RTEMS_MULTIPROCESSING) |
---|
798 | Objects_Id id |
---|
799 | #else |
---|
800 | Objects_Id id RTEMS_UNUSED |
---|
801 | #endif |
---|
802 | ) |
---|
803 | { |
---|
804 | #if defined(RTEMS_MULTIPROCESSING) |
---|
805 | return _Objects_Is_local_node( _Objects_Get_node(id) ); |
---|
806 | #else |
---|
807 | return true; |
---|
808 | #endif |
---|
809 | } |
---|
810 | |
---|
811 | /** |
---|
812 | * This function returns true if left and right are equal, |
---|
813 | * and false otherwise. |
---|
814 | * |
---|
815 | * @param[in] left is the Id on the left hand side of the comparison |
---|
816 | * @param[in] right is the Id on the right hand side of the comparison |
---|
817 | * |
---|
818 | * @return This method returns true if the specified object IDs are equal |
---|
819 | * and false otherwise. |
---|
820 | */ |
---|
821 | RTEMS_INLINE_ROUTINE bool _Objects_Are_ids_equal( |
---|
822 | Objects_Id left, |
---|
823 | Objects_Id right |
---|
824 | ) |
---|
825 | { |
---|
826 | return ( left == right ); |
---|
827 | } |
---|
828 | |
---|
829 | /** |
---|
830 | * This function returns a pointer to the local_table object |
---|
831 | * referenced by the index. |
---|
832 | * |
---|
833 | * @param[in] information points to an Object Information Table |
---|
834 | * @param[in] index is the index of the object the caller wants to access |
---|
835 | * |
---|
836 | * @return This method returns a pointer to a local object or NULL if the |
---|
837 | * index is invalid and RTEMS_DEBUG is enabled. |
---|
838 | */ |
---|
839 | RTEMS_INLINE_ROUTINE Objects_Control *_Objects_Get_local_object( |
---|
840 | Objects_Information *information, |
---|
841 | uint16_t index |
---|
842 | ) |
---|
843 | { |
---|
844 | /* |
---|
845 | * This routine is ONLY to be called from places in the code |
---|
846 | * where the Id is known to be good. Therefore, this should NOT |
---|
847 | * occur in normal situations. |
---|
848 | */ |
---|
849 | #if defined(RTEMS_DEBUG) |
---|
850 | if ( index > information->maximum ) |
---|
851 | return NULL; |
---|
852 | #endif |
---|
853 | return information->local_table[ index ]; |
---|
854 | } |
---|
855 | |
---|
856 | /** |
---|
857 | * This function sets the pointer to the local_table object |
---|
858 | * referenced by the index. |
---|
859 | * |
---|
860 | * @param[in] information points to an Object Information Table |
---|
861 | * @param[in] index is the index of the object the caller wants to access |
---|
862 | * @param[in] the_object is the local object pointer |
---|
863 | * |
---|
864 | * @note This routine is ONLY to be called in places where the |
---|
865 | * index portion of the Id is known to be good. This is |
---|
866 | * OK since it is normally called from object create/init |
---|
867 | * or delete/destroy operations. |
---|
868 | */ |
---|
869 | |
---|
870 | RTEMS_INLINE_ROUTINE void _Objects_Set_local_object( |
---|
871 | Objects_Information *information, |
---|
872 | uint32_t index, |
---|
873 | Objects_Control *the_object |
---|
874 | ) |
---|
875 | { |
---|
876 | /* |
---|
877 | * This routine is ONLY to be called from places in the code |
---|
878 | * where the Id is known to be good. Therefore, this should NOT |
---|
879 | * occur in normal situations. |
---|
880 | */ |
---|
881 | #if defined(RTEMS_DEBUG) |
---|
882 | if ( index > information->maximum ) |
---|
883 | return; |
---|
884 | #endif |
---|
885 | |
---|
886 | information->local_table[ index ] = the_object; |
---|
887 | } |
---|
888 | |
---|
889 | /** |
---|
890 | * This function sets the pointer to the local_table object |
---|
891 | * referenced by the index to a NULL so the object Id is invalid |
---|
892 | * after this call. |
---|
893 | * |
---|
894 | * @param[in] information points to an Object Information Table |
---|
895 | * @param[in] the_object is the local object pointer |
---|
896 | * |
---|
897 | * @note This routine is ONLY to be called in places where the |
---|
898 | * index portion of the Id is known to be good. This is |
---|
899 | * OK since it is normally called from object create/init |
---|
900 | * or delete/destroy operations. |
---|
901 | */ |
---|
902 | |
---|
903 | RTEMS_INLINE_ROUTINE void _Objects_Invalidate_Id( |
---|
904 | Objects_Information *information, |
---|
905 | Objects_Control *the_object |
---|
906 | ) |
---|
907 | { |
---|
908 | _Assert( information != NULL ); |
---|
909 | _Assert( the_object != NULL ); |
---|
910 | |
---|
911 | _Objects_Set_local_object( |
---|
912 | information, |
---|
913 | _Objects_Get_index( the_object->id ), |
---|
914 | NULL |
---|
915 | ); |
---|
916 | } |
---|
917 | |
---|
918 | /** |
---|
919 | * This function places the_object control pointer and object name |
---|
920 | * in the Local Pointer and Local Name Tables, respectively. |
---|
921 | * |
---|
922 | * @param[in] information points to an Object Information Table |
---|
923 | * @param[in] the_object is a pointer to an object |
---|
924 | * @param[in] name is the name of the object to make accessible |
---|
925 | */ |
---|
926 | RTEMS_INLINE_ROUTINE void _Objects_Open( |
---|
927 | Objects_Information *information, |
---|
928 | Objects_Control *the_object, |
---|
929 | Objects_Name name |
---|
930 | ) |
---|
931 | { |
---|
932 | _Assert( information != NULL ); |
---|
933 | _Assert( the_object != NULL ); |
---|
934 | |
---|
935 | the_object->name = name; |
---|
936 | |
---|
937 | _Objects_Set_local_object( |
---|
938 | information, |
---|
939 | _Objects_Get_index( the_object->id ), |
---|
940 | the_object |
---|
941 | ); |
---|
942 | } |
---|
943 | |
---|
944 | /** |
---|
945 | * This function places the_object control pointer and object name |
---|
946 | * in the Local Pointer and Local Name Tables, respectively. |
---|
947 | * |
---|
948 | * @param[in] information points to an Object Information Table |
---|
949 | * @param[in] the_object is a pointer to an object |
---|
950 | * @param[in] name is the name of the object to make accessible |
---|
951 | */ |
---|
952 | RTEMS_INLINE_ROUTINE void _Objects_Open_u32( |
---|
953 | Objects_Information *information, |
---|
954 | Objects_Control *the_object, |
---|
955 | uint32_t name |
---|
956 | ) |
---|
957 | { |
---|
958 | /* ASSERT: information->is_string == false */ |
---|
959 | the_object->name.name_u32 = name; |
---|
960 | |
---|
961 | _Objects_Set_local_object( |
---|
962 | information, |
---|
963 | _Objects_Get_index( the_object->id ), |
---|
964 | the_object |
---|
965 | ); |
---|
966 | } |
---|
967 | |
---|
968 | /** |
---|
969 | * This function places the_object control pointer and object name |
---|
970 | * in the Local Pointer and Local Name Tables, respectively. |
---|
971 | * |
---|
972 | * @param[in] information points to an Object Information Table |
---|
973 | * @param[in] the_object is a pointer to an object |
---|
974 | * @param[in] name is the name of the object to make accessible |
---|
975 | */ |
---|
976 | RTEMS_INLINE_ROUTINE void _Objects_Open_string( |
---|
977 | Objects_Information *information, |
---|
978 | Objects_Control *the_object, |
---|
979 | const char *name |
---|
980 | ) |
---|
981 | { |
---|
982 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
---|
983 | /* ASSERT: information->is_string */ |
---|
984 | the_object->name.name_p = name; |
---|
985 | #endif |
---|
986 | |
---|
987 | _Objects_Set_local_object( |
---|
988 | information, |
---|
989 | _Objects_Get_index( the_object->id ), |
---|
990 | the_object |
---|
991 | ); |
---|
992 | } |
---|
993 | |
---|
994 | /** |
---|
995 | * @brief Puts back an object obtained with _Objects_Get(). |
---|
996 | * |
---|
997 | * This function decrements the thread dispatch disable level. The |
---|
998 | * _Thread_Dispatch() is called if the level reaches zero. |
---|
999 | */ |
---|
1000 | RTEMS_INLINE_ROUTINE void _Objects_Put( |
---|
1001 | Objects_Control *the_object |
---|
1002 | ) |
---|
1003 | { |
---|
1004 | (void) the_object; |
---|
1005 | _Thread_Enable_dispatch(); |
---|
1006 | } |
---|
1007 | |
---|
1008 | /** |
---|
1009 | * @brief Puts back an object obtained with _Objects_Get(). |
---|
1010 | * |
---|
1011 | * This function decrements the thread dispatch disable level. The |
---|
1012 | * _Thread_Dispatch() is not called if the level reaches zero, thus a thread |
---|
1013 | * dispatch will not take place immediately on the current processor. |
---|
1014 | */ |
---|
1015 | RTEMS_INLINE_ROUTINE void _Objects_Put_without_thread_dispatch( |
---|
1016 | Objects_Control *the_object |
---|
1017 | ) |
---|
1018 | { |
---|
1019 | (void) the_object; |
---|
1020 | _Thread_Unnest_dispatch(); |
---|
1021 | } |
---|
1022 | |
---|
1023 | /** |
---|
1024 | * @brief Locks the object allocator mutex. |
---|
1025 | * |
---|
1026 | * While holding the allocator mutex the executing thread is protected from |
---|
1027 | * asynchronous thread restart and deletion. |
---|
1028 | * |
---|
1029 | * The usage of the object allocator mutex with the thread life protection |
---|
1030 | * makes it possible to allocate and free objects without thread dispatching |
---|
1031 | * disabled. The usage of a unified workspace and unlimited objects may lead |
---|
1032 | * to heap fragmentation. Thus the execution time of the _Objects_Allocate() |
---|
1033 | * function may increase during system run-time. |
---|
1034 | * |
---|
1035 | * @see _Objects_Allocator_unlock() and _Objects_Allocate(). |
---|
1036 | */ |
---|
1037 | RTEMS_INLINE_ROUTINE void _Objects_Allocator_lock( void ) |
---|
1038 | { |
---|
1039 | _RTEMS_Lock_allocator(); |
---|
1040 | } |
---|
1041 | |
---|
1042 | /** |
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1043 | * @brief Unlocks the object allocator mutex. |
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1044 | * |
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1045 | * In case the mutex is fully unlocked, then this function restores the |
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1046 | * previous thread life protection state and thus may not return if the |
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1047 | * executing thread was restarted or deleted in the mean-time. |
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1048 | */ |
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1049 | RTEMS_INLINE_ROUTINE void _Objects_Allocator_unlock( void ) |
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1050 | { |
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1051 | _RTEMS_Unlock_allocator(); |
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1052 | } |
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1053 | |
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1054 | /** @} */ |
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1055 | |
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1056 | #ifdef __cplusplus |
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1057 | } |
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1058 | #endif |
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1059 | |
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1060 | #if defined(RTEMS_MULTIPROCESSING) |
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1061 | #include <rtems/score/objectmp.h> |
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1062 | #endif |
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1063 | |
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1064 | |
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1065 | #endif |
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1066 | /* end of include file */ |
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