1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Objects MP Support |
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5 | * @ingroup ScoreObjectMP |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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10 | * On-Line Applications Research Corporation (OAR). |
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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.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/objectimpl.h> |
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22 | #include <rtems/score/interr.h> |
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23 | #include <rtems/score/isrlock.h> |
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24 | #include <rtems/score/wkspace.h> |
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25 | #include <rtems/config.h> |
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26 | |
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27 | #define OBJECTS_MP_CONTROL_OF_ID_LOOKUP_NODE( node ) \ |
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28 | RTEMS_CONTAINER_OF( node, Objects_MP_Control, Nodes.Active.Id_lookup ) |
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29 | |
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30 | #define OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( node ) \ |
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31 | RTEMS_CONTAINER_OF( node, Objects_MP_Control, Nodes.Active.Name_lookup ) |
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32 | |
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33 | typedef struct { |
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34 | uint32_t name; |
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35 | uint32_t node; |
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36 | } Objects_MP_Name_and_node; |
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37 | |
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38 | uint16_t _Objects_Local_node; |
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39 | |
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40 | uint16_t _Objects_Maximum_nodes; |
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41 | |
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42 | uint32_t _Objects_MP_Maximum_global_objects; |
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43 | |
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44 | static CHAIN_DEFINE_EMPTY( _Objects_MP_Inactive_global_objects ); |
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45 | |
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46 | ISR_LOCK_DEFINE( static, _Objects_MP_Global_lock, "MP Objects" ) |
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47 | |
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48 | static void _Objects_MP_Global_acquire( ISR_lock_Context *lock_context ) |
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49 | { |
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50 | _ISR_lock_ISR_disable_and_acquire( &_Objects_MP_Global_lock, lock_context ); |
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51 | } |
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52 | |
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53 | static void _Objects_MP_Global_release( ISR_lock_Context *lock_context ) |
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54 | { |
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55 | _ISR_lock_Release_and_ISR_enable( &_Objects_MP_Global_lock, lock_context ); |
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56 | } |
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57 | |
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58 | static bool _Objects_MP_Id_equal( |
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59 | const void *left, |
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60 | const RBTree_Node *right |
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61 | ) |
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62 | { |
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63 | const Objects_Id *the_left; |
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64 | const Objects_MP_Control *the_right; |
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65 | |
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66 | the_left = left; |
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67 | the_right = OBJECTS_MP_CONTROL_OF_ID_LOOKUP_NODE( right ); |
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68 | |
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69 | return *the_left == the_right->id; |
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70 | } |
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71 | |
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72 | static bool _Objects_MP_Id_less( |
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73 | const void *left, |
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74 | const RBTree_Node *right |
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75 | ) |
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76 | { |
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77 | const Objects_Id *the_left; |
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78 | const Objects_MP_Control *the_right; |
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79 | |
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80 | the_left = left; |
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81 | the_right = OBJECTS_MP_CONTROL_OF_ID_LOOKUP_NODE( right ); |
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82 | |
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83 | return *the_left < the_right->id; |
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84 | } |
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85 | |
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86 | static void *_Objects_MP_Id_map( RBTree_Node *node ) |
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87 | { |
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88 | return OBJECTS_MP_CONTROL_OF_ID_LOOKUP_NODE( node ); |
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89 | } |
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90 | |
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91 | static bool _Objects_MP_Name_equal( |
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92 | const void *left, |
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93 | const RBTree_Node *right |
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94 | ) |
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95 | { |
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96 | const uint32_t *the_left; |
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97 | const Objects_MP_Control *the_right; |
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98 | |
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99 | the_left = left; |
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100 | the_right = OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( right ); |
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101 | |
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102 | return *the_left == the_right->name; |
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103 | } |
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104 | |
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105 | static bool _Objects_MP_Name_less( |
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106 | const void *left, |
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107 | const RBTree_Node *right |
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108 | ) |
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109 | { |
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110 | const uint32_t *the_left; |
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111 | const Objects_MP_Control *the_right; |
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112 | |
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113 | the_left = left; |
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114 | the_right = OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( right ); |
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115 | |
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116 | return *the_left < the_right->name; |
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117 | } |
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118 | |
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119 | static void *_Objects_MP_Name_map( RBTree_Node *node ) |
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120 | { |
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121 | return OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( node ); |
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122 | } |
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123 | |
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124 | static bool _Objects_MP_Name_and_node_equal( |
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125 | const void *left, |
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126 | const RBTree_Node *right |
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127 | ) |
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128 | { |
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129 | const Objects_MP_Name_and_node *the_left; |
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130 | const Objects_MP_Control *the_right; |
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131 | |
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132 | the_left = left; |
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133 | the_right = OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( right ); |
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134 | |
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135 | return the_left->name == the_right->name |
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136 | && the_left->node == _Objects_Get_node( the_right->id ); |
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137 | } |
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138 | |
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139 | static bool _Objects_MP_Name_and_node_less( |
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140 | const void *left, |
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141 | const RBTree_Node *right |
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142 | ) |
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143 | { |
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144 | const Objects_MP_Name_and_node *the_left; |
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145 | const Objects_MP_Control *the_right; |
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146 | |
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147 | the_left = left; |
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148 | the_right = OBJECTS_MP_CONTROL_OF_NAME_LOOKUP_NODE( right ); |
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149 | |
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150 | /* |
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151 | * Use > for the node to find smaller numbered nodes first in case of equal |
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152 | * names. |
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153 | */ |
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154 | return the_left->name < the_right->name |
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155 | || ( the_left->name == the_right->name |
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156 | && the_left->node > _Objects_Get_node( the_right->id ) ); |
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157 | } |
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158 | |
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159 | void _Objects_MP_Handler_early_initialization(void) |
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160 | { |
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161 | uint32_t node; |
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162 | uint32_t maximum_nodes; |
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163 | |
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164 | node = _Configuration_MP_table->node; |
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165 | maximum_nodes = _Configuration_MP_table->maximum_nodes; |
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166 | |
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167 | if ( node < 1 || node > maximum_nodes ) |
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168 | _Internal_error( INTERNAL_ERROR_INVALID_NODE ); |
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169 | |
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170 | _Objects_Local_node = node; |
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171 | _Objects_Maximum_nodes = maximum_nodes; |
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172 | } |
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173 | |
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174 | void _Objects_MP_Handler_initialization( void ) |
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175 | { |
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176 | uint32_t maximum_global_objects; |
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177 | |
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178 | maximum_global_objects = _Configuration_MP_table->maximum_global_objects; |
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179 | |
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180 | _Objects_MP_Maximum_global_objects = maximum_global_objects; |
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181 | |
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182 | if ( maximum_global_objects == 0 ) { |
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183 | return; |
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184 | } |
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185 | |
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186 | _Chain_Initialize( |
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187 | &_Objects_MP_Inactive_global_objects, |
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188 | _Workspace_Allocate_or_fatal_error( |
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189 | maximum_global_objects * sizeof( Objects_MP_Control ) |
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190 | ), |
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191 | maximum_global_objects, |
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192 | sizeof( Objects_MP_Control ) |
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193 | ); |
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194 | } |
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195 | |
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196 | void _Objects_MP_Open ( |
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197 | Objects_Information *information, |
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198 | Objects_MP_Control *the_global_object, |
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199 | uint32_t the_name, /* XXX -- wrong for variable */ |
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200 | Objects_Id the_id |
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201 | ) |
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202 | { |
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203 | Objects_MP_Name_and_node name_and_node; |
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204 | ISR_lock_Context lock_context; |
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205 | |
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206 | the_global_object->id = the_id; |
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207 | the_global_object->name = the_name; |
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208 | |
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209 | name_and_node.name = the_name; |
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210 | name_and_node.node = _Objects_Get_node( the_id ); |
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211 | |
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212 | _Objects_MP_Global_acquire( &lock_context ); |
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213 | |
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214 | _RBTree_Insert_inline( |
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215 | &information->Global_by_id, |
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216 | &the_global_object->Nodes.Active.Id_lookup, |
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217 | &the_id, |
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218 | _Objects_MP_Id_less |
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219 | ); |
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220 | _RBTree_Insert_inline( |
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221 | &information->Global_by_name, |
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222 | &the_global_object->Nodes.Active.Name_lookup, |
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223 | &name_and_node, |
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224 | _Objects_MP_Name_and_node_less |
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225 | ); |
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226 | |
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227 | _Objects_MP_Global_release( &lock_context ); |
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228 | } |
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229 | |
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230 | bool _Objects_MP_Allocate_and_open ( |
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231 | Objects_Information *information, |
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232 | uint32_t the_name, /* XXX -- wrong for variable */ |
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233 | Objects_Id the_id, |
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234 | bool is_fatal_error |
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235 | ) |
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236 | { |
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237 | Objects_MP_Control *the_global_object; |
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238 | |
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239 | the_global_object = _Objects_MP_Allocate_global_object(); |
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240 | if ( _Objects_MP_Is_null_global_object( the_global_object ) ) { |
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241 | |
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242 | if ( is_fatal_error == false ) |
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243 | return false; |
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244 | |
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245 | _Internal_error( INTERNAL_ERROR_OUT_OF_GLOBAL_OBJECTS ); |
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246 | } |
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247 | |
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248 | _Objects_MP_Open( information, the_global_object, the_name, the_id ); |
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249 | |
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250 | return true; |
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251 | } |
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252 | |
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253 | void _Objects_MP_Close ( |
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254 | Objects_Information *information, |
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255 | Objects_Id the_id |
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256 | ) |
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257 | { |
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258 | Objects_MP_Control *the_global_object; |
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259 | ISR_lock_Context lock_context; |
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260 | |
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261 | _Objects_MP_Global_acquire( &lock_context ); |
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262 | |
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263 | the_global_object = _RBTree_Find_inline( |
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264 | &information->Global_by_id, |
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265 | &the_id, |
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266 | _Objects_MP_Id_equal, |
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267 | _Objects_MP_Id_less, |
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268 | _Objects_MP_Id_map |
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269 | ); |
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270 | |
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271 | if ( the_global_object != NULL ) { |
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272 | _RBTree_Extract( |
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273 | &information->Global_by_id, |
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274 | &the_global_object->Nodes.Active.Id_lookup |
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275 | ); |
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276 | _RBTree_Extract( |
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277 | &information->Global_by_name, |
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278 | &the_global_object->Nodes.Active.Name_lookup |
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279 | ); |
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280 | _Objects_MP_Free_global_object( the_global_object ); |
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281 | _Objects_MP_Global_release( &lock_context ); |
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282 | } else { |
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283 | _Objects_MP_Global_release( &lock_context ); |
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284 | |
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285 | _Internal_error( INTERNAL_ERROR_INVALID_GLOBAL_ID ); |
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286 | } |
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287 | } |
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288 | |
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289 | Objects_Name_or_id_lookup_errors _Objects_MP_Global_name_search( |
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290 | Objects_Information *information, |
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291 | Objects_Name the_name, |
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292 | uint32_t nodes_to_search, |
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293 | Objects_Id *the_id |
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294 | ) |
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295 | { |
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296 | Objects_Name_or_id_lookup_errors status; |
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297 | Objects_MP_Control *the_global_object; |
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298 | ISR_lock_Context lock_context; |
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299 | |
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300 | if ( nodes_to_search > _Objects_Maximum_nodes ) { |
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301 | return OBJECTS_INVALID_NODE; |
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302 | } |
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303 | |
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304 | _Objects_MP_Global_acquire( &lock_context ); |
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305 | |
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306 | if ( nodes_to_search == OBJECTS_SEARCH_ALL_NODES ) { |
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307 | the_global_object = _RBTree_Find_inline( |
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308 | &information->Global_by_name, |
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309 | &the_name.name_u32, |
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310 | _Objects_MP_Name_equal, |
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311 | _Objects_MP_Name_less, |
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312 | _Objects_MP_Name_map |
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313 | ); |
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314 | } else { |
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315 | Objects_MP_Name_and_node name_and_node; |
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316 | |
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317 | name_and_node.name = the_name.name_u32; |
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318 | name_and_node.node = nodes_to_search; |
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319 | |
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320 | the_global_object = _RBTree_Find_inline( |
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321 | &information->Global_by_name, |
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322 | &name_and_node, |
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323 | _Objects_MP_Name_and_node_equal, |
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324 | _Objects_MP_Name_and_node_less, |
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325 | _Objects_MP_Name_map |
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326 | ); |
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327 | } |
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328 | |
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329 | if ( the_global_object != NULL ) { |
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330 | *the_id = the_global_object->id; |
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331 | status = OBJECTS_NAME_OR_ID_LOOKUP_SUCCESSFUL; |
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332 | } else { |
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333 | status = OBJECTS_INVALID_NAME; |
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334 | } |
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335 | |
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336 | _Objects_MP_Global_release( &lock_context ); |
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337 | |
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338 | return status; |
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339 | } |
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340 | |
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341 | bool _Objects_MP_Is_remote( |
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342 | Objects_Id the_id, |
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343 | const Objects_Information *information |
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344 | ) |
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345 | { |
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346 | Objects_MP_Control *the_global_object; |
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347 | ISR_lock_Context lock_context; |
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348 | |
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349 | _Objects_MP_Global_acquire( &lock_context ); |
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350 | |
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351 | the_global_object = _RBTree_Find_inline( |
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352 | &information->Global_by_id, |
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353 | &the_id, |
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354 | _Objects_MP_Id_equal, |
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355 | _Objects_MP_Id_less, |
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356 | _Objects_MP_Id_map |
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357 | ); |
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358 | |
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359 | _Objects_MP_Global_release( &lock_context ); |
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360 | |
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361 | return the_global_object != NULL; |
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362 | } |
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363 | |
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364 | Objects_MP_Control *_Objects_MP_Allocate_global_object( void ) |
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365 | { |
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366 | Objects_MP_Control *the_global_object; |
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367 | ISR_lock_Context lock_context; |
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368 | |
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369 | _Objects_MP_Global_acquire( &lock_context ); |
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370 | |
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371 | the_global_object = (Objects_MP_Control *) |
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372 | _Chain_Get_unprotected( &_Objects_MP_Inactive_global_objects ); |
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373 | |
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374 | _Objects_MP_Global_release( &lock_context ); |
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375 | return the_global_object; |
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376 | } |
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377 | |
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378 | void _Objects_MP_Free_global_object( Objects_MP_Control *the_global_object ) |
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379 | { |
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380 | ISR_lock_Context lock_context; |
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381 | |
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382 | _Objects_MP_Global_acquire( &lock_context ); |
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383 | |
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384 | _Chain_Initialize_node( &the_global_object->Nodes.Inactive ); |
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385 | _Chain_Append_unprotected( |
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386 | &_Objects_MP_Inactive_global_objects, |
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387 | &the_global_object->Nodes.Inactive |
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388 | ); |
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389 | |
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390 | _Objects_MP_Global_release( &lock_context ); |
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391 | } |
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