1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief User Extension Iteration Helpers |
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5 | * |
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6 | * @ingroup ScoreUserExt |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2012, 2017 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Dornierstr. 4 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * The license and distribution terms for this file may be |
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19 | * found in the file LICENSE in this distribution or at |
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20 | * http://www.rtems.org/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #if HAVE_CONFIG_H |
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24 | #include "config.h" |
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25 | #endif |
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26 | |
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27 | #include <rtems/config.h> |
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28 | #include <rtems/score/userextimpl.h> |
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29 | |
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30 | #include <pthread.h> |
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31 | |
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32 | User_extensions_List _User_extensions_List = { |
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33 | CHAIN_INITIALIZER_EMPTY( _User_extensions_List.Active ), |
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34 | CHAIN_ITERATOR_REGISTRY_INITIALIZER( _User_extensions_List.Iterators ) |
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35 | #if defined(RTEMS_SMP) |
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36 | , |
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37 | ISR_LOCK_INITIALIZER( "User Extensions List" ) |
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38 | #endif |
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39 | }; |
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40 | |
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41 | void _User_extensions_Thread_create_visitor( |
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42 | Thread_Control *executing, |
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43 | void *arg, |
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44 | const User_extensions_Table *callouts |
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45 | ) |
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46 | { |
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47 | User_extensions_thread_create_extension callout = callouts->thread_create; |
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48 | |
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49 | if ( callout != NULL ) { |
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50 | User_extensions_Thread_create_context *ctx = arg; |
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51 | |
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52 | ctx->ok = ctx->ok && (*callout)( executing, ctx->created ); |
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53 | } |
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54 | } |
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55 | |
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56 | void _User_extensions_Thread_delete_visitor( |
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57 | Thread_Control *executing, |
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58 | void *arg, |
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59 | const User_extensions_Table *callouts |
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60 | ) |
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61 | { |
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62 | User_extensions_thread_delete_extension callout = callouts->thread_delete; |
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63 | |
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64 | if ( callout != NULL ) { |
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65 | (*callout)( executing, arg ); |
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66 | } |
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67 | } |
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68 | |
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69 | void _User_extensions_Thread_start_visitor( |
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70 | Thread_Control *executing, |
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71 | void *arg, |
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72 | const User_extensions_Table *callouts |
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73 | ) |
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74 | { |
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75 | User_extensions_thread_start_extension callout = callouts->thread_start; |
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76 | |
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77 | if ( callout != NULL ) { |
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78 | (*callout)( executing, arg ); |
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79 | } |
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80 | } |
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81 | |
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82 | void _User_extensions_Thread_restart_visitor( |
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83 | Thread_Control *executing, |
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84 | void *arg, |
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85 | const User_extensions_Table *callouts |
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86 | ) |
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87 | { |
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88 | User_extensions_thread_restart_extension callout = callouts->thread_restart; |
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89 | |
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90 | if ( callout != NULL ) { |
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91 | (*callout)( executing, arg ); |
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92 | } |
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93 | } |
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94 | |
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95 | void _User_extensions_Thread_begin_visitor( |
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96 | Thread_Control *executing, |
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97 | void *arg, |
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98 | const User_extensions_Table *callouts |
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99 | ) |
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100 | { |
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101 | User_extensions_thread_begin_extension callout = callouts->thread_begin; |
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102 | |
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103 | if ( callout != NULL ) { |
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104 | (*callout)( executing ); |
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105 | } |
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106 | } |
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107 | |
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108 | void _User_extensions_Thread_exitted_visitor( |
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109 | Thread_Control *executing, |
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110 | void *arg, |
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111 | const User_extensions_Table *callouts |
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112 | ) |
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113 | { |
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114 | User_extensions_thread_exitted_extension callout = callouts->thread_exitted; |
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115 | |
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116 | if ( callout != NULL ) { |
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117 | (*callout)( executing ); |
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118 | } |
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119 | } |
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120 | |
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121 | void _User_extensions_Fatal_visitor( |
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122 | Thread_Control *executing, |
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123 | void *arg, |
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124 | const User_extensions_Table *callouts |
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125 | ) |
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126 | { |
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127 | User_extensions_fatal_extension callout = callouts->fatal; |
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128 | |
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129 | if ( callout != NULL ) { |
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130 | const User_extensions_Fatal_context *ctx = arg; |
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131 | |
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132 | (*callout)( ctx->source, false, ctx->error ); |
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133 | } |
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134 | } |
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135 | |
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136 | void _User_extensions_Thread_terminate_visitor( |
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137 | Thread_Control *executing, |
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138 | void *arg, |
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139 | const User_extensions_Table *callouts |
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140 | ) |
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141 | { |
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142 | User_extensions_thread_terminate_extension callout = |
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143 | callouts->thread_terminate; |
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144 | |
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145 | if ( callout != NULL ) { |
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146 | (*callout)( executing ); |
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147 | } |
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148 | } |
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149 | |
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150 | void _User_extensions_Iterate( |
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151 | void *arg, |
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152 | User_extensions_Visitor visitor, |
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153 | Chain_Iterator_direction direction |
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154 | ) |
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155 | { |
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156 | Thread_Control *executing; |
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157 | const User_extensions_Table *initial_current; |
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158 | const User_extensions_Table *initial_begin; |
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159 | const User_extensions_Table *initial_end; |
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160 | const Chain_Node *end; |
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161 | Chain_Node *node; |
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162 | User_extensions_Iterator iter; |
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163 | ISR_lock_Context lock_context; |
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164 | |
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165 | executing = _Thread_Get_executing(); |
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166 | |
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167 | initial_begin = rtems_configuration_get_user_extension_table(); |
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168 | initial_end = |
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169 | initial_begin + rtems_configuration_get_number_of_initial_extensions(); |
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170 | |
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171 | if ( direction == CHAIN_ITERATOR_FORWARD ) { |
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172 | initial_current = initial_begin; |
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173 | |
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174 | while ( initial_current != initial_end ) { |
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175 | (*visitor)( executing, arg, initial_current ); |
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176 | ++initial_current; |
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177 | } |
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178 | |
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179 | end = _Chain_Immutable_tail( &_User_extensions_List.Active ); |
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180 | } else { |
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181 | end = _Chain_Immutable_head( &_User_extensions_List.Active ); |
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182 | } |
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183 | |
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184 | _User_extensions_Acquire( &lock_context ); |
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185 | |
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186 | _Chain_Iterator_initialize( |
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187 | &_User_extensions_List.Active, |
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188 | &_User_extensions_List.Iterators, |
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189 | &iter.Iterator, |
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190 | direction |
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191 | ); |
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192 | |
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193 | if ( executing != NULL ) { |
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194 | iter.previous = executing->last_user_extensions_iterator; |
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195 | executing->last_user_extensions_iterator = &iter; |
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196 | } |
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197 | |
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198 | while ( ( node = _Chain_Iterator_next( &iter.Iterator ) ) != end ) { |
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199 | const User_extensions_Control *extension; |
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200 | |
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201 | _Chain_Iterator_set_position( &iter.Iterator, node ); |
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202 | |
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203 | _User_extensions_Release( &lock_context ); |
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204 | |
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205 | extension = (const User_extensions_Control *) node; |
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206 | ( *visitor )( executing, arg, &extension->Callouts ); |
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207 | |
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208 | _User_extensions_Acquire( &lock_context ); |
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209 | } |
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210 | |
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211 | if ( executing != NULL ) { |
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212 | executing->last_user_extensions_iterator = iter.previous; |
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213 | } |
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214 | |
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215 | _Chain_Iterator_destroy( &iter.Iterator ); |
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216 | |
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217 | _User_extensions_Release( &lock_context ); |
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218 | |
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219 | if ( direction == CHAIN_ITERATOR_BACKWARD ) { |
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220 | initial_current = initial_end; |
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221 | |
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222 | while ( initial_current != initial_begin ) { |
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223 | --initial_current; |
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224 | (*visitor)( executing, arg, initial_current ); |
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225 | } |
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226 | } |
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227 | } |
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