1 | /** |
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2 | * @file rtems/rbtree.inl |
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3 | * |
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4 | * This include file contains all the constants and structures associated |
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5 | * with the RBTree API in RTEMS. The rbtree is a Red Black Tree that |
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6 | * is part of the Super Core. This is the published interface to that |
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7 | * code. |
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8 | * |
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9 | */ |
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10 | |
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11 | /* |
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12 | * Copyright (c) 2010 Gedare Bloom. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | * |
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18 | * $Id$ |
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19 | */ |
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20 | |
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21 | #ifndef _RTEMS_RBTREE_H |
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22 | # error "Never use <rtems/rbtree.inl> directly; include <rtems/rbtree.h> instead." |
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23 | #endif |
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24 | |
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25 | #ifndef _RTEMS_RBTREE_INL |
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26 | #define _RTEMS_RBTREE_INL |
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27 | |
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28 | #include <rtems/score/rbtree.inl> |
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29 | |
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30 | /** |
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31 | * @brief Initialize a RBTree Header |
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32 | * |
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33 | * This routine initializes @a the_rbtree structure to manage the |
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34 | * contiguous array of @a number_nodes nodes which starts at |
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35 | * @a starting_address. Each node is of @a node_size bytes. |
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36 | */ |
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37 | RTEMS_INLINE_ROUTINE void rtems_rbtree_initialize( |
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38 | rtems_rbtree_control *the_rbtree, |
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39 | void *starting_address, |
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40 | size_t number_nodes, |
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41 | size_t node_size |
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42 | ) |
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43 | { |
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44 | _RBTree_Initialize( the_rbtree, starting_address, number_nodes, node_size); |
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45 | } |
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46 | |
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47 | /** |
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48 | * @brief Initialize this RBTree as Empty |
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49 | * |
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50 | * This routine initializes @a the_rbtree to contain zero nodes. |
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51 | */ |
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52 | RTEMS_INLINE_ROUTINE void rtems_rbtree_initialize_empty( |
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53 | rtems_rbtree_control *the_rbtree |
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54 | ) |
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55 | { |
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56 | _RBTree_Initialize_empty( the_rbtree ); |
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57 | } |
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58 | |
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59 | /** |
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60 | * @brief Set off rbtree |
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61 | * |
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62 | * This function sets the next and previous fields of the @a node to NULL |
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63 | * indicating the @a node is not part of any rbtree. |
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64 | */ |
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65 | RTEMS_INLINE_ROUTINE void rtems_rbtree_set_off_rbtree( |
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66 | rtems_rbtree_node *node |
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67 | ) |
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68 | { |
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69 | _RBTree_Set_off_rbtree( node ); |
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70 | } |
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71 | |
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72 | /** |
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73 | * @brief Is the Node off RBTree |
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74 | * |
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75 | * This function returns true if the @a node is not on a rbtree. A @a node is |
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76 | * off rbtree if the next and previous fields are set to NULL. |
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77 | */ |
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78 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_node_off_rbtree( |
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79 | const rtems_rbtree_node *node |
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80 | ) |
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81 | { |
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82 | return _RBTree_Is_node_off_rbtree( node ); |
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83 | } |
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84 | |
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85 | /** |
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86 | * @brief Is the RBTree Node Pointer NULL |
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87 | * |
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88 | * This function returns true if @a the_node is NULL and false otherwise. |
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89 | */ |
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90 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_null_node( |
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91 | const rtems_rbtree_node *the_node |
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92 | ) |
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93 | { |
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94 | return _RBTree_Is_null_node( the_node ); |
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95 | } |
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96 | |
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97 | /** |
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98 | * @brief Return pointer to RBTree Root |
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99 | * |
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100 | * This function returns a pointer to the root node of @a the_rbtree. |
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101 | */ |
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102 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_root( |
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103 | rtems_rbtree_control *the_rbtree |
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104 | ) |
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105 | { |
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106 | return _RBTree_Root( the_rbtree ); |
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107 | } |
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108 | |
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109 | /** |
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110 | * @brief Return pointer to RBTree Minimum |
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111 | * |
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112 | * This function returns a pointer to the minimum node of @a the_rbtree. |
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113 | */ |
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114 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_min( |
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115 | rtems_rbtree_control *the_rbtree |
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116 | ) |
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117 | { |
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118 | return _RBTree_First( the_rbtree, RBT_LEFT ); |
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119 | } |
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120 | |
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121 | /** |
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122 | * @brief Return pointer to RBTree Maximum |
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123 | * |
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124 | * This function returns a pointer to the maximum node of @a the_rbtree. |
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125 | */ |
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126 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_max( |
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127 | rtems_rbtree_control *the_rbtree |
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128 | ) |
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129 | { |
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130 | return _RBTree_First( the_rbtree, RBT_RIGHT ); |
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131 | } |
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132 | |
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133 | /** |
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134 | * @brief Return pointer to the left child node from this node |
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135 | * |
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136 | * This function returns a pointer to the left child node of @a the_node. |
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137 | */ |
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138 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_left( |
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139 | rtems_rbtree_node *the_node |
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140 | ) |
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141 | { |
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142 | return _RBTree_Left( the_node ); |
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143 | } |
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144 | |
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145 | /** |
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146 | * @brief Return pointer to the right child node from this node |
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147 | * |
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148 | * This function returns a pointer to the right child node of @a the_node. |
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149 | */ |
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150 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_right( |
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151 | rtems_rbtree_node *the_node |
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152 | ) |
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153 | { |
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154 | return _RBTree_Right( the_node ); |
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155 | } |
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156 | |
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157 | /** |
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158 | * @brief Return pointer to the parent child node from this node |
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159 | * |
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160 | * This function returns a pointer to the parent node of @a the_node. |
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161 | */ |
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162 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_parent( |
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163 | rtems_rbtree_node *the_node |
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164 | ) |
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165 | { |
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166 | return _RBTree_Parent( the_node ); |
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167 | } |
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168 | |
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169 | /** |
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170 | * @brief Are Two Nodes Equal |
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171 | * |
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172 | * This function returns true if @a left and @a right are equal, |
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173 | * and false otherwise. |
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174 | */ |
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175 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_are_nodes_equal( |
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176 | const rtems_rbtree_node *left, |
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177 | const rtems_rbtree_node *right |
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178 | ) |
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179 | { |
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180 | return _RBTree_Are_nodes_equal( left, right ); |
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181 | } |
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182 | |
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183 | /** |
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184 | * @brief Is the RBTree Empty |
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185 | * |
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186 | * This function returns true if there a no nodes on @a the_rbtree and |
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187 | * false otherwise. |
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188 | */ |
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189 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_empty( |
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190 | rtems_rbtree_control *the_rbtree |
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191 | ) |
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192 | { |
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193 | return _RBTree_Is_empty( the_rbtree ); |
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194 | } |
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195 | |
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196 | /** |
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197 | * @brief Is this the Minimum Node on the RBTree |
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198 | * |
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199 | * This function returns true if @a the_node is the min node on @a the_rbtree |
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200 | * and false otherwise. |
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201 | */ |
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202 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_min( |
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203 | rtems_rbtree_control *the_rbtree, |
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204 | const rtems_rbtree_node *the_node |
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205 | ) |
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206 | { |
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207 | return _RBTree_Is_first( the_rbtree, the_node, RBT_LEFT ); |
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208 | } |
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209 | |
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210 | /** |
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211 | * @brief Is this the Maximum Node on the RBTree |
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212 | * |
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213 | * This function returns true if @a the_node is the max node on @a the_rbtree |
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214 | * and false otherwise. |
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215 | */ |
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216 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_max( |
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217 | rtems_rbtree_control *the_rbtree, |
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218 | const rtems_rbtree_node *the_node |
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219 | ) |
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220 | { |
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221 | return _RBTree_Is_first( the_rbtree, the_node, RBT_RIGHT ); |
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222 | } |
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223 | |
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224 | |
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225 | /** |
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226 | * @brief Does this RBTree have only One Node |
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227 | * |
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228 | * This function returns true if there is only one node on @a the_rbtree and |
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229 | * false otherwise. |
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230 | */ |
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231 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_has_only_one_node( |
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232 | const rtems_rbtree_control *the_rbtree |
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233 | ) |
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234 | { |
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235 | return _RBTree_Has_only_one_node( the_rbtree ); |
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236 | } |
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237 | |
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238 | /** |
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239 | * @brief Is this Node the RBTree Root |
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240 | * |
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241 | * This function returns true if @a the_node is the root of @a the_rbtree and |
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242 | * false otherwise. |
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243 | */ |
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244 | RTEMS_INLINE_ROUTINE bool rtems_rbtree_is_root( |
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245 | rtems_rbtree_control *the_rbtree, |
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246 | const rtems_rbtree_node *the_node |
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247 | ) |
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248 | { |
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249 | return _RBTree_Is_root( the_rbtree, the_node ); |
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250 | } |
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251 | |
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252 | /** @brief Find the node with given value in the tree |
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253 | * |
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254 | * This function returns a pointer to the node having value equal to @a value |
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255 | * if it exists within @a the_rbtree, and NULL if not. |
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256 | */ |
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257 | RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_find( |
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258 | rtems_rbtree_control *the_rbtree, |
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259 | unsigned int value |
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260 | ) |
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261 | { |
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262 | return _RBTree_Find( the_rbtree, value ); |
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263 | } |
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264 | |
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265 | /** @brief Find the node's in-order predecessor |
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266 | * |
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267 | * This function returns a pointer to the in-order predecessor |
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268 | * of @a the_node if it exists, and NULL if not. |
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269 | */ |
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270 | RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_predecessor( |
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271 | rtems_rbtree_node *the_node |
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272 | ) |
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273 | { |
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274 | return _RBTree_Predecessor( the_node ); |
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275 | } |
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276 | |
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277 | /** @brief Find the node's in-order successor |
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278 | * |
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279 | * This function returns a pointer to the in-order successor |
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280 | * of @a the_node if it exists, and NULL if not. |
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281 | */ |
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282 | RTEMS_INLINE_ROUTINE rtems_rbtree_node* rtems_rbtree_successor( |
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283 | rtems_rbtree_node *the_node |
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284 | ) |
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285 | { |
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286 | return _RBTree_Successor( the_node ); |
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287 | } |
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288 | |
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289 | /** |
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290 | * @brief Extract the specified node from a rbtree |
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291 | * |
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292 | * This routine extracts @a the_node from @a the_rbtree on which it resides. |
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293 | * It disables interrupts to ensure the atomicity of the extract operation. |
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294 | */ |
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295 | RTEMS_INLINE_ROUTINE void rtems_rbtree_extract( |
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296 | rtems_rbtree_control *the_rbtree, |
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297 | rtems_rbtree_node *the_node |
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298 | ) |
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299 | { |
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300 | _RBTree_Extract( the_rbtree, the_node ); |
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301 | } |
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302 | |
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303 | /** |
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304 | * @brief Obtain the min node on a rbtree |
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305 | * |
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306 | * This function removes the min node from @a the_rbtree and returns |
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307 | * a pointer to that node. If @a the_rbtree is empty, then NULL is returned. |
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308 | * It disables interrupts to ensure the atomicity of the get operation. |
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309 | */ |
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310 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_get_min( |
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311 | rtems_rbtree_control *the_rbtree |
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312 | ) |
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313 | { |
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314 | return _RBTree_Get( the_rbtree, RBT_LEFT ); |
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315 | } |
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316 | |
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317 | /** |
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318 | * @brief Obtain the max node on a rbtree |
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319 | * |
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320 | * This function removes the max node from @a the_rbtree and returns |
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321 | * a pointer to that node. If @a the_rbtree is empty, then NULL is returned. |
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322 | * It disables interrupts to ensure the atomicity of the get operation. |
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323 | */ |
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324 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_get_max( |
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325 | rtems_rbtree_control *the_rbtree |
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326 | ) |
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327 | { |
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328 | return _RBTree_Get( the_rbtree, RBT_RIGHT ); |
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329 | } |
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330 | |
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331 | /** |
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332 | * @brief Peek at the min node on a rbtree |
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333 | * |
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334 | * This function returns a pointer to the min node from @a the_rbtree |
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335 | * without changing the tree. If @a the_rbtree is empty, |
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336 | * then NULL is returned. |
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337 | * It disables interrupts to ensure the atomicity of the peek operation. |
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338 | */ |
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339 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_peek_min( |
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340 | rtems_rbtree_control *the_rbtree |
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341 | ) |
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342 | { |
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343 | return _RBTree_Peek( the_rbtree, RBT_LEFT ); |
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344 | } |
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345 | |
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346 | /** |
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347 | * @brief Peek at the max node on a rbtree |
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348 | * |
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349 | * This function returns a pointer to the max node from @a the_rbtree |
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350 | * without changing the tree. If @a the_rbtree is empty, |
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351 | * then NULL is returned. |
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352 | * It disables interrupts to ensure the atomicity of the peek operation. |
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353 | */ |
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354 | RTEMS_INLINE_ROUTINE rtems_rbtree_node *rtems_rbtree_peek_max( |
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355 | rtems_rbtree_control *the_rbtree |
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356 | ) |
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357 | { |
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358 | return _RBTree_Peek( the_rbtree, RBT_RIGHT ); |
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359 | } |
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360 | |
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361 | |
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362 | /** |
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363 | * @brief Find the control header of the tree containing a given node. |
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364 | * |
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365 | * This routine finds the rtems_rbtree_control structure of the tree |
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366 | * containing @a the_node. |
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367 | * It disables interrupts to ensure the atomicity of the find operation. |
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368 | */ |
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369 | RTEMS_INLINE_ROUTINE rtems_rbtree_control *rtems_rbtree_find_header( |
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370 | rtems_rbtree_node *the_node |
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371 | ) |
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372 | { |
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373 | return(_RBTree_Find_header( the_node )); |
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374 | } |
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375 | |
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376 | /** |
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377 | * @brief Insert a node on a rbtree |
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378 | * |
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379 | * This routine inserts @a the_node on @a the_rbtree. |
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380 | * It disables interrupts to ensure the atomicity of the insert operation. |
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381 | */ |
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382 | RTEMS_INLINE_ROUTINE void rtems_rbtree_insert( |
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383 | rtems_rbtree_control *the_rbtree, |
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384 | rtems_rbtree_node *the_node |
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385 | ) |
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386 | { |
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387 | _RBTree_Insert( the_rbtree, the_node ); |
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388 | } |
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389 | |
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390 | #endif |
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391 | /* end of include file */ |
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