1 | /* |
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2 | * Copyright (c) 2015 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/score/threadimpl.h> |
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20 | #include <rtems/score/chainimpl.h> |
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21 | #include <rtems/score/rbtreeimpl.h> |
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22 | |
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23 | static void _Thread_queue_Do_nothing_priority_change( |
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24 | Thread_Control *the_thread, |
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25 | Priority_Control new_priority, |
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26 | Thread_queue_Queue *queue |
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27 | ) |
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28 | { |
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29 | /* Do nothing */ |
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30 | } |
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31 | |
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32 | static void _Thread_queue_Do_nothing_extract( |
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33 | Thread_queue_Queue *queue, |
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34 | Thread_Control *the_thread |
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35 | ) |
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36 | { |
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37 | /* Do nothing */ |
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38 | } |
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39 | |
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40 | static void _Thread_queue_FIFO_initialize( |
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41 | Thread_queue_Queue *queue |
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42 | ) |
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43 | { |
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44 | _Chain_Initialize_empty( &queue->Heads.Fifo ); |
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45 | } |
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46 | |
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47 | static void _Thread_queue_FIFO_enqueue( |
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48 | Thread_queue_Queue *queue, |
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49 | Thread_Control *the_thread |
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50 | ) |
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51 | { |
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52 | _Chain_Append_unprotected( |
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53 | &queue->Heads.Fifo, |
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54 | &the_thread->Wait.Node.Chain |
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55 | ); |
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56 | } |
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57 | |
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58 | static void _Thread_queue_FIFO_extract( |
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59 | Thread_queue_Queue *queue, |
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60 | Thread_Control *the_thread |
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61 | ) |
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62 | { |
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63 | _Chain_Extract_unprotected( &the_thread->Wait.Node.Chain ); |
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64 | } |
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65 | |
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66 | static Thread_Control *_Thread_queue_FIFO_first( |
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67 | Thread_queue_Queue *queue |
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68 | ) |
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69 | { |
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70 | Chain_Control *fifo = &queue->Heads.Fifo; |
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71 | |
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72 | return _Chain_Is_empty( fifo ) ? |
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73 | NULL : THREAD_CHAIN_NODE_TO_THREAD( _Chain_First( fifo ) ); |
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74 | } |
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75 | |
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76 | static void _Thread_queue_Priority_priority_change( |
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77 | Thread_Control *the_thread, |
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78 | Priority_Control new_priority, |
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79 | Thread_queue_Queue *queue |
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80 | ) |
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81 | { |
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82 | _RBTree_Extract( |
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83 | &queue->Heads.Priority, |
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84 | &the_thread->Wait.Node.RBTree |
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85 | ); |
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86 | _RBTree_Insert( |
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87 | &queue->Heads.Priority, |
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88 | &the_thread->Wait.Node.RBTree, |
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89 | _Thread_queue_Compare_priority, |
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90 | false |
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91 | ); |
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92 | } |
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93 | |
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94 | static void _Thread_queue_Priority_initialize( |
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95 | Thread_queue_Queue *queue |
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96 | ) |
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97 | { |
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98 | _RBTree_Initialize_empty( &queue->Heads.Priority ); |
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99 | } |
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100 | |
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101 | static void _Thread_queue_Priority_enqueue( |
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102 | Thread_queue_Queue *queue, |
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103 | Thread_Control *the_thread |
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104 | ) |
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105 | { |
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106 | _RBTree_Insert( |
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107 | &queue->Heads.Priority, |
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108 | &the_thread->Wait.Node.RBTree, |
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109 | _Thread_queue_Compare_priority, |
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110 | false |
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111 | ); |
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112 | } |
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113 | |
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114 | static void _Thread_queue_Priority_extract( |
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115 | Thread_queue_Queue *queue, |
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116 | Thread_Control *the_thread |
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117 | ) |
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118 | { |
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119 | _RBTree_Extract( |
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120 | &queue->Heads.Priority, |
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121 | &the_thread->Wait.Node.RBTree |
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122 | ); |
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123 | } |
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124 | |
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125 | static Thread_Control *_Thread_queue_Priority_first( |
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126 | Thread_queue_Queue *queue |
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127 | ) |
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128 | { |
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129 | RBTree_Node *first; |
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130 | |
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131 | first = _RBTree_First( &queue->Heads.Priority, RBT_LEFT ); |
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132 | |
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133 | return first != NULL ? THREAD_RBTREE_NODE_TO_THREAD( first ) : NULL; |
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134 | } |
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135 | |
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136 | const Thread_queue_Operations _Thread_queue_Operations_default = { |
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137 | .priority_change = _Thread_queue_Do_nothing_priority_change, |
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138 | .extract = _Thread_queue_Do_nothing_extract |
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139 | /* |
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140 | * The default operations are only used in _Thread_Change_priority() and |
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141 | * _Thread_Timeout() and don't have a thread queue associated with them, so |
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142 | * the enqueue and first operations are superfluous. |
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143 | */ |
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144 | }; |
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145 | |
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146 | const Thread_queue_Operations _Thread_queue_Operations_FIFO = { |
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147 | .priority_change = _Thread_queue_Do_nothing_priority_change, |
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148 | .initialize = _Thread_queue_FIFO_initialize, |
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149 | .enqueue = _Thread_queue_FIFO_enqueue, |
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150 | .extract = _Thread_queue_FIFO_extract, |
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151 | .first = _Thread_queue_FIFO_first |
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152 | }; |
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153 | |
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154 | const Thread_queue_Operations _Thread_queue_Operations_priority = { |
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155 | .priority_change = _Thread_queue_Priority_priority_change, |
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156 | .initialize = _Thread_queue_Priority_initialize, |
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157 | .enqueue = _Thread_queue_Priority_enqueue, |
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158 | .extract = _Thread_queue_Priority_extract, |
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159 | .first = _Thread_queue_Priority_first |
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160 | }; |
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