1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief EDF SMP Scheduler Implementation |
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5 | * |
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6 | * @ingroup ScoreSchedulerSMPEDF |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2017 embedded brains GmbH. |
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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/scheduleredfsmp.h> |
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22 | #include <rtems/score/schedulersmpimpl.h> |
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23 | |
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24 | static Scheduler_EDF_SMP_Context * |
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25 | _Scheduler_EDF_SMP_Get_context( const Scheduler_Control *scheduler ) |
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26 | { |
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27 | return (Scheduler_EDF_SMP_Context *) _Scheduler_Get_context( scheduler ); |
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28 | } |
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29 | |
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30 | static Scheduler_EDF_SMP_Context * |
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31 | _Scheduler_EDF_SMP_Get_self( Scheduler_Context *context ) |
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32 | { |
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33 | return (Scheduler_EDF_SMP_Context *) context; |
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34 | } |
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35 | |
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36 | static inline Scheduler_EDF_SMP_Node * |
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37 | _Scheduler_EDF_SMP_Node_downcast( Scheduler_Node *node ) |
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38 | { |
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39 | return (Scheduler_EDF_SMP_Node *) node; |
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40 | } |
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41 | |
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42 | static inline bool _Scheduler_EDF_SMP_Less( |
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43 | const void *left, |
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44 | const RBTree_Node *right |
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45 | ) |
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46 | { |
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47 | const Priority_Control *the_left; |
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48 | const Scheduler_SMP_Node *the_right; |
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49 | Priority_Control prio_left; |
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50 | Priority_Control prio_right; |
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51 | |
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52 | the_left = left; |
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53 | the_right = RTEMS_CONTAINER_OF( right, Scheduler_SMP_Node, Base.Node.RBTree ); |
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54 | |
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55 | prio_left = *the_left; |
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56 | prio_right = the_right->priority; |
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57 | |
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58 | return prio_left < prio_right; |
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59 | } |
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60 | |
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61 | static inline bool _Scheduler_EDF_SMP_Less_or_equal( |
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62 | const void *left, |
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63 | const RBTree_Node *right |
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64 | ) |
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65 | { |
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66 | const Priority_Control *the_left; |
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67 | const Scheduler_SMP_Node *the_right; |
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68 | Priority_Control prio_left; |
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69 | Priority_Control prio_right; |
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70 | |
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71 | the_left = left; |
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72 | the_right = RTEMS_CONTAINER_OF( right, Scheduler_SMP_Node, Base.Node.RBTree ); |
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73 | |
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74 | prio_left = *the_left; |
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75 | prio_right = the_right->priority; |
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76 | |
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77 | return prio_left <= prio_right; |
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78 | } |
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79 | |
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80 | void _Scheduler_EDF_SMP_Initialize( const Scheduler_Control *scheduler ) |
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81 | { |
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82 | Scheduler_EDF_SMP_Context *self = |
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83 | _Scheduler_EDF_SMP_Get_context( scheduler ); |
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84 | |
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85 | _Scheduler_SMP_Initialize( &self->Base ); |
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86 | _RBTree_Initialize_empty( &self->Ready ); |
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87 | } |
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88 | |
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89 | void _Scheduler_EDF_SMP_Node_initialize( |
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90 | const Scheduler_Control *scheduler, |
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91 | Scheduler_Node *node, |
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92 | Thread_Control *the_thread, |
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93 | Priority_Control priority |
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94 | ) |
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95 | { |
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96 | Scheduler_SMP_Node *smp_node; |
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97 | |
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98 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
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99 | _Scheduler_SMP_Node_initialize( scheduler, smp_node, the_thread, priority ); |
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100 | } |
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101 | |
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102 | static void _Scheduler_EDF_SMP_Do_update( |
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103 | Scheduler_Context *context, |
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104 | Scheduler_Node *node, |
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105 | Priority_Control new_priority |
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106 | ) |
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107 | { |
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108 | Scheduler_SMP_Node *smp_node; |
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109 | |
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110 | (void) context; |
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111 | |
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112 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
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113 | _Scheduler_SMP_Node_update_priority( smp_node, new_priority ); |
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114 | } |
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115 | |
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116 | static bool _Scheduler_EDF_SMP_Has_ready( Scheduler_Context *context ) |
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117 | { |
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118 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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119 | |
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120 | return !_RBTree_Is_empty( &self->Ready ); |
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121 | } |
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122 | |
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123 | static Scheduler_Node *_Scheduler_EDF_SMP_Get_highest_ready( |
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124 | Scheduler_Context *context, |
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125 | Scheduler_Node *node |
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126 | ) |
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127 | { |
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128 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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129 | Scheduler_Node *first = (Scheduler_Node *) _RBTree_Minimum( &self->Ready ); |
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130 | |
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131 | (void) node; |
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132 | |
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133 | _Assert( &first->Node != NULL ); |
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134 | |
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135 | return first; |
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136 | } |
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137 | |
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138 | static void _Scheduler_EDF_SMP_Move_from_scheduled_to_ready( |
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139 | Scheduler_Context *context, |
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140 | Scheduler_Node *scheduled_to_ready |
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141 | ) |
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142 | { |
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143 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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144 | Scheduler_EDF_SMP_Node *node = |
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145 | _Scheduler_EDF_SMP_Node_downcast( scheduled_to_ready ); |
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146 | |
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147 | _Chain_Extract_unprotected( &node->Base.Base.Node.Chain ); |
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148 | _RBTree_Initialize_node( &node->Base.Base.Node.RBTree ); |
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149 | _RBTree_Insert_inline( |
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150 | &self->Ready, |
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151 | &node->Base.Base.Node.RBTree, |
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152 | &node->Base.priority, |
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153 | _Scheduler_EDF_SMP_Less |
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154 | ); |
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155 | } |
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156 | |
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157 | static void _Scheduler_EDF_SMP_Move_from_ready_to_scheduled( |
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158 | Scheduler_Context *context, |
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159 | Scheduler_Node *ready_to_scheduled |
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160 | ) |
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161 | { |
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162 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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163 | Scheduler_EDF_SMP_Node *node = |
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164 | _Scheduler_EDF_SMP_Node_downcast( ready_to_scheduled ); |
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165 | |
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166 | _RBTree_Extract( &self->Ready, &node->Base.Base.Node.RBTree ); |
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167 | _Chain_Initialize_node( &node->Base.Base.Node.Chain ); |
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168 | _Chain_Insert_ordered_unprotected( |
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169 | &self->Base.Scheduled, |
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170 | &node->Base.Base.Node.Chain, |
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171 | _Scheduler_SMP_Insert_priority_fifo_order |
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172 | ); |
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173 | } |
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174 | |
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175 | static void _Scheduler_EDF_SMP_Insert_ready_lifo( |
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176 | Scheduler_Context *context, |
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177 | Scheduler_Node *node_to_insert |
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178 | ) |
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179 | { |
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180 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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181 | Scheduler_EDF_SMP_Node *node = |
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182 | _Scheduler_EDF_SMP_Node_downcast( node_to_insert ); |
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183 | |
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184 | _RBTree_Initialize_node( &node->Base.Base.Node.RBTree ); |
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185 | _RBTree_Insert_inline( |
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186 | &self->Ready, |
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187 | &node->Base.Base.Node.RBTree, |
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188 | &node->Base.priority, |
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189 | _Scheduler_EDF_SMP_Less_or_equal |
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190 | ); |
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191 | } |
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192 | |
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193 | static void _Scheduler_EDF_SMP_Insert_ready_fifo( |
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194 | Scheduler_Context *context, |
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195 | Scheduler_Node *node_to_insert |
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196 | ) |
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197 | { |
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198 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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199 | Scheduler_EDF_SMP_Node *node = |
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200 | _Scheduler_EDF_SMP_Node_downcast( node_to_insert ); |
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201 | |
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202 | _RBTree_Initialize_node( &node->Base.Base.Node.RBTree ); |
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203 | _RBTree_Insert_inline( |
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204 | &self->Ready, |
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205 | &node->Base.Base.Node.RBTree, |
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206 | &node->Base.priority, |
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207 | _Scheduler_EDF_SMP_Less |
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208 | ); |
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209 | } |
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210 | |
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211 | static void _Scheduler_EDF_SMP_Extract_from_ready( |
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212 | Scheduler_Context *context, |
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213 | Scheduler_Node *node_to_extract |
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214 | ) |
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215 | { |
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216 | Scheduler_EDF_SMP_Context *self = _Scheduler_EDF_SMP_Get_self( context ); |
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217 | Scheduler_EDF_SMP_Node *node = |
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218 | _Scheduler_EDF_SMP_Node_downcast( node_to_extract ); |
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219 | |
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220 | _RBTree_Extract( &self->Ready, &node->Base.Base.Node.RBTree ); |
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221 | _Chain_Initialize_node( &node->Base.Base.Node.Chain ); |
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222 | } |
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223 | |
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224 | void _Scheduler_EDF_SMP_Block( |
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225 | const Scheduler_Control *scheduler, |
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226 | Thread_Control *thread, |
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227 | Scheduler_Node *node |
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228 | ) |
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229 | { |
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230 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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231 | |
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232 | _Scheduler_SMP_Block( |
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233 | context, |
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234 | thread, |
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235 | node, |
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236 | _Scheduler_EDF_SMP_Extract_from_ready, |
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237 | _Scheduler_EDF_SMP_Get_highest_ready, |
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238 | _Scheduler_EDF_SMP_Move_from_ready_to_scheduled, |
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239 | _Scheduler_SMP_Allocate_processor_lazy |
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240 | ); |
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241 | } |
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242 | |
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243 | static bool _Scheduler_EDF_SMP_Enqueue_ordered( |
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244 | Scheduler_Context *context, |
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245 | Scheduler_Node *node, |
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246 | Chain_Node_order order, |
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247 | Scheduler_SMP_Insert insert_ready, |
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248 | Scheduler_SMP_Insert insert_scheduled |
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249 | ) |
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250 | { |
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251 | return _Scheduler_SMP_Enqueue_ordered( |
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252 | context, |
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253 | node, |
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254 | order, |
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255 | insert_ready, |
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256 | insert_scheduled, |
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257 | _Scheduler_EDF_SMP_Move_from_scheduled_to_ready, |
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258 | _Scheduler_SMP_Get_lowest_scheduled, |
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259 | _Scheduler_SMP_Allocate_processor_lazy |
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260 | ); |
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261 | } |
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262 | |
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263 | static bool _Scheduler_EDF_SMP_Enqueue_lifo( |
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264 | Scheduler_Context *context, |
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265 | Scheduler_Node *node |
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266 | ) |
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267 | { |
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268 | return _Scheduler_EDF_SMP_Enqueue_ordered( |
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269 | context, |
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270 | node, |
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271 | _Scheduler_SMP_Insert_priority_lifo_order, |
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272 | _Scheduler_EDF_SMP_Insert_ready_lifo, |
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273 | _Scheduler_SMP_Insert_scheduled_lifo |
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274 | ); |
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275 | } |
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276 | |
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277 | static bool _Scheduler_EDF_SMP_Enqueue_fifo( |
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278 | Scheduler_Context *context, |
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279 | Scheduler_Node *node |
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280 | ) |
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281 | { |
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282 | return _Scheduler_EDF_SMP_Enqueue_ordered( |
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283 | context, |
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284 | node, |
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285 | _Scheduler_SMP_Insert_priority_fifo_order, |
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286 | _Scheduler_EDF_SMP_Insert_ready_fifo, |
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287 | _Scheduler_SMP_Insert_scheduled_fifo |
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288 | ); |
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289 | } |
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290 | |
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291 | static bool _Scheduler_EDF_SMP_Enqueue_scheduled_ordered( |
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292 | Scheduler_Context *context, |
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293 | Scheduler_Node *node, |
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294 | Chain_Node_order order, |
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295 | Scheduler_SMP_Insert insert_ready, |
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296 | Scheduler_SMP_Insert insert_scheduled |
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297 | ) |
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298 | { |
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299 | return _Scheduler_SMP_Enqueue_scheduled_ordered( |
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300 | context, |
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301 | node, |
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302 | order, |
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303 | _Scheduler_EDF_SMP_Extract_from_ready, |
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304 | _Scheduler_EDF_SMP_Get_highest_ready, |
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305 | insert_ready, |
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306 | insert_scheduled, |
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307 | _Scheduler_EDF_SMP_Move_from_ready_to_scheduled, |
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308 | _Scheduler_SMP_Allocate_processor_lazy |
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309 | ); |
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310 | } |
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311 | |
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312 | static bool _Scheduler_EDF_SMP_Enqueue_scheduled_lifo( |
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313 | Scheduler_Context *context, |
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314 | Scheduler_Node *node |
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315 | ) |
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316 | { |
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317 | return _Scheduler_EDF_SMP_Enqueue_scheduled_ordered( |
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318 | context, |
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319 | node, |
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320 | _Scheduler_SMP_Insert_priority_lifo_order, |
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321 | _Scheduler_EDF_SMP_Insert_ready_lifo, |
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322 | _Scheduler_SMP_Insert_scheduled_lifo |
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323 | ); |
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324 | } |
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325 | |
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326 | static bool _Scheduler_EDF_SMP_Enqueue_scheduled_fifo( |
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327 | Scheduler_Context *context, |
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328 | Scheduler_Node *node |
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329 | ) |
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330 | { |
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331 | return _Scheduler_EDF_SMP_Enqueue_scheduled_ordered( |
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332 | context, |
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333 | node, |
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334 | _Scheduler_SMP_Insert_priority_fifo_order, |
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335 | _Scheduler_EDF_SMP_Insert_ready_fifo, |
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336 | _Scheduler_SMP_Insert_scheduled_fifo |
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337 | ); |
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338 | } |
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339 | |
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340 | void _Scheduler_EDF_SMP_Unblock( |
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341 | const Scheduler_Control *scheduler, |
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342 | Thread_Control *thread, |
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343 | Scheduler_Node *node |
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344 | ) |
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345 | { |
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346 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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347 | |
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348 | _Scheduler_SMP_Unblock( |
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349 | context, |
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350 | thread, |
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351 | node, |
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352 | _Scheduler_EDF_SMP_Do_update, |
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353 | _Scheduler_EDF_SMP_Enqueue_fifo |
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354 | ); |
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355 | } |
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356 | |
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357 | static bool _Scheduler_EDF_SMP_Do_ask_for_help( |
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358 | Scheduler_Context *context, |
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359 | Thread_Control *the_thread, |
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360 | Scheduler_Node *node |
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361 | ) |
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362 | { |
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363 | return _Scheduler_SMP_Ask_for_help( |
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364 | context, |
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365 | the_thread, |
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366 | node, |
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367 | _Scheduler_SMP_Insert_priority_lifo_order, |
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368 | _Scheduler_EDF_SMP_Insert_ready_lifo, |
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369 | _Scheduler_SMP_Insert_scheduled_lifo, |
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370 | _Scheduler_EDF_SMP_Move_from_scheduled_to_ready, |
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371 | _Scheduler_SMP_Get_lowest_scheduled, |
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372 | _Scheduler_SMP_Allocate_processor_lazy |
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373 | ); |
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374 | } |
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375 | |
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376 | void _Scheduler_EDF_SMP_Update_priority( |
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377 | const Scheduler_Control *scheduler, |
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378 | Thread_Control *thread, |
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379 | Scheduler_Node *node |
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380 | ) |
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381 | { |
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382 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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383 | |
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384 | _Scheduler_SMP_Update_priority( |
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385 | context, |
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386 | thread, |
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387 | node, |
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388 | _Scheduler_EDF_SMP_Extract_from_ready, |
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389 | _Scheduler_EDF_SMP_Do_update, |
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390 | _Scheduler_EDF_SMP_Enqueue_fifo, |
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391 | _Scheduler_EDF_SMP_Enqueue_lifo, |
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392 | _Scheduler_EDF_SMP_Enqueue_scheduled_fifo, |
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393 | _Scheduler_EDF_SMP_Enqueue_scheduled_lifo, |
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394 | _Scheduler_EDF_SMP_Do_ask_for_help |
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395 | ); |
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396 | } |
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397 | |
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398 | bool _Scheduler_EDF_SMP_Ask_for_help( |
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399 | const Scheduler_Control *scheduler, |
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400 | Thread_Control *the_thread, |
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401 | Scheduler_Node *node |
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402 | ) |
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403 | { |
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404 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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405 | |
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406 | return _Scheduler_EDF_SMP_Do_ask_for_help( context, the_thread, node ); |
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407 | } |
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408 | |
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409 | void _Scheduler_EDF_SMP_Reconsider_help_request( |
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410 | const Scheduler_Control *scheduler, |
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411 | Thread_Control *the_thread, |
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412 | Scheduler_Node *node |
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413 | ) |
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414 | { |
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415 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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416 | |
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417 | _Scheduler_SMP_Reconsider_help_request( |
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418 | context, |
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419 | the_thread, |
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420 | node, |
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421 | _Scheduler_EDF_SMP_Extract_from_ready |
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422 | ); |
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423 | } |
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424 | |
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425 | void _Scheduler_EDF_SMP_Withdraw_node( |
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426 | const Scheduler_Control *scheduler, |
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427 | Thread_Control *the_thread, |
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428 | Scheduler_Node *node, |
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429 | Thread_Scheduler_state next_state |
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430 | ) |
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431 | { |
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432 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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433 | |
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434 | _Scheduler_SMP_Withdraw_node( |
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435 | context, |
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436 | the_thread, |
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437 | node, |
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438 | next_state, |
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439 | _Scheduler_EDF_SMP_Extract_from_ready, |
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440 | _Scheduler_EDF_SMP_Get_highest_ready, |
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441 | _Scheduler_EDF_SMP_Move_from_ready_to_scheduled, |
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442 | _Scheduler_SMP_Allocate_processor_lazy |
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443 | ); |
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444 | } |
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445 | |
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446 | void _Scheduler_EDF_SMP_Add_processor( |
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447 | const Scheduler_Control *scheduler, |
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448 | Thread_Control *idle |
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449 | ) |
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450 | { |
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451 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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452 | |
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453 | _Scheduler_SMP_Add_processor( |
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454 | context, |
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455 | idle, |
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456 | _Scheduler_EDF_SMP_Has_ready, |
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457 | _Scheduler_EDF_SMP_Enqueue_scheduled_fifo |
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458 | ); |
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459 | } |
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460 | |
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461 | Thread_Control *_Scheduler_EDF_SMP_Remove_processor( |
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462 | const Scheduler_Control *scheduler, |
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463 | Per_CPU_Control *cpu |
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464 | ) |
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465 | { |
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466 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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467 | |
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468 | return _Scheduler_SMP_Remove_processor( |
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469 | context, |
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470 | cpu, |
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471 | _Scheduler_EDF_SMP_Extract_from_ready, |
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472 | _Scheduler_EDF_SMP_Enqueue_fifo |
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473 | ); |
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474 | } |
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475 | |
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476 | void _Scheduler_EDF_SMP_Yield( |
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477 | const Scheduler_Control *scheduler, |
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478 | Thread_Control *thread, |
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479 | Scheduler_Node *node |
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480 | ) |
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481 | { |
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482 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
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483 | |
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484 | _Scheduler_SMP_Yield( |
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485 | context, |
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486 | thread, |
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487 | node, |
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488 | _Scheduler_EDF_SMP_Extract_from_ready, |
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489 | _Scheduler_EDF_SMP_Enqueue_fifo, |
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490 | _Scheduler_EDF_SMP_Enqueue_scheduled_fifo |
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491 | ); |
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492 | } |
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