1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Chain API |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2010-2014 embedded brains GmbH. |
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9 | * |
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10 | * COPYRIGHT (c) 1989-2008. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #ifndef _RTEMS_CHAIN_H |
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19 | #define _RTEMS_CHAIN_H |
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20 | |
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21 | #include <rtems/score/chainimpl.h> |
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22 | #include <rtems/rtems/event.h> |
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23 | |
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24 | #ifdef __cplusplus |
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25 | extern "C" { |
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26 | #endif |
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27 | |
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28 | /** |
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29 | * @defgroup ClassicChains Chains |
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30 | * |
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31 | * @ingroup ClassicRTEMS |
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32 | * |
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33 | * @brief Chain API |
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34 | */ |
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35 | /**@{**/ |
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36 | |
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37 | typedef Chain_Node rtems_chain_node; |
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38 | |
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39 | typedef Chain_Control rtems_chain_control; |
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40 | |
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41 | /** |
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42 | * @brief Chain initializer for an empty chain with designator @a name. |
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43 | */ |
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44 | #define RTEMS_CHAIN_INITIALIZER_EMPTY( name ) \ |
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45 | CHAIN_INITIALIZER_EMPTY( name ) |
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46 | |
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47 | /** |
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48 | * @brief Chain initializer for a chain with one @a node. |
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49 | * |
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50 | * @see RTEMS_CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN(). |
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51 | */ |
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52 | #define RTEMS_CHAIN_INITIALIZER_ONE_NODE( node ) \ |
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53 | CHAIN_INITIALIZER_ONE_NODE( node ) |
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54 | |
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55 | /** |
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56 | * @brief Chain node initializer for a @a chain containing exactly this node. |
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57 | * |
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58 | * @see RTEMS_CHAIN_INITIALIZER_ONE_NODE(). |
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59 | */ |
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60 | #define RTEMS_CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN( chain ) \ |
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61 | CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN( chain ) |
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62 | |
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63 | /** |
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64 | * @brief Chain definition for an empty chain with designator @a name. |
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65 | */ |
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66 | #define RTEMS_CHAIN_DEFINE_EMPTY( name ) \ |
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67 | rtems_chain_control name = RTEMS_CHAIN_INITIALIZER_EMPTY( name ) |
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68 | |
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69 | /** |
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70 | * @brief Appends the @a node to the @a chain and sends the @a events to the |
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71 | * @a task if the @a chain was empty before the append. |
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72 | * |
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73 | * @see rtems_chain_append_with_empty_check() and rtems_event_send(). |
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74 | * |
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75 | * @retval RTEMS_SUCCESSFUL Successful operation. |
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76 | * @retval RTEMS_INVALID_ID No such task. |
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77 | */ |
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78 | rtems_status_code rtems_chain_append_with_notification( |
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79 | rtems_chain_control *chain, |
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80 | rtems_chain_node *node, |
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81 | rtems_id task, |
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82 | rtems_event_set events |
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83 | ); |
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84 | |
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85 | /** |
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86 | * @brief Prepends the @a node to the @a chain and sends the @a events to the |
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87 | * @a task if the @a chain was empty before the prepend. |
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88 | * |
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89 | * @see rtems_chain_prepend_with_empty_check() and rtems_event_send(). |
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90 | * |
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91 | * @retval RTEMS_SUCCESSFUL Successful operation. |
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92 | * @retval RTEMS_INVALID_ID No such task. |
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93 | */ |
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94 | rtems_status_code rtems_chain_prepend_with_notification( |
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95 | rtems_chain_control *chain, |
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96 | rtems_chain_node *node, |
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97 | rtems_id task, |
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98 | rtems_event_set events |
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99 | ); |
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100 | |
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101 | /** |
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102 | * @brief Gets the first @a node of the @a chain and sends the @a events to the |
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103 | * @a task if the @a chain is empty after the get. |
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104 | * |
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105 | * @see rtems_chain_get_with_empty_check() and rtems_event_send(). |
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106 | * |
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107 | * @retval RTEMS_SUCCESSFUL Successful operation. |
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108 | * @retval RTEMS_INVALID_ID No such task. |
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109 | */ |
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110 | rtems_status_code rtems_chain_get_with_notification( |
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111 | rtems_chain_control *chain, |
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112 | rtems_id task, |
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113 | rtems_event_set events, |
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114 | rtems_chain_node **node |
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115 | ); |
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116 | |
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117 | /** |
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118 | * @brief Gets the first @a node of the @a chain and sends the @a events to the |
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119 | * @a task if the @a chain is empty afterwards. |
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120 | * |
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121 | * @see rtems_chain_get() and rtems_event_receive(). |
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122 | * |
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123 | * @retval RTEMS_SUCCESSFUL Successful operation. |
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124 | * @retval RTEMS_TIMEOUT Timeout. |
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125 | */ |
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126 | rtems_status_code rtems_chain_get_with_wait( |
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127 | rtems_chain_control *chain, |
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128 | rtems_event_set events, |
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129 | rtems_interval timeout, |
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130 | rtems_chain_node **node |
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131 | ); |
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132 | |
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133 | /** |
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134 | * @brief Initialize a chain Header. |
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135 | * |
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136 | * This routine initializes @a the_chain structure to manage the |
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137 | * contiguous array of @a number_nodes nodes which starts at |
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138 | * @a starting_address. Each node is of @a node_size bytes. |
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139 | * |
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140 | * @param[in] the_chain specifies the chain to initialize |
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141 | * @param[in] starting_address is the starting address of the array |
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142 | * of elements |
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143 | * @param[in] number_nodes is the number of nodes that will be in the chain |
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144 | * @param[in] node_size is the size of each node |
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145 | */ |
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146 | RTEMS_INLINE_ROUTINE void rtems_chain_initialize( |
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147 | rtems_chain_control *the_chain, |
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148 | void *starting_address, |
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149 | size_t number_nodes, |
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150 | size_t node_size |
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151 | ) |
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152 | { |
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153 | _Chain_Initialize( |
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154 | the_chain, |
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155 | starting_address, |
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156 | number_nodes, |
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157 | node_size |
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158 | ); |
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159 | } |
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160 | |
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161 | /** |
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162 | * @brief Initialize this chain as empty. |
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163 | * |
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164 | * This routine initializes the specified chain to contain zero nodes. |
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165 | * |
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166 | * @param[in] the_chain is the chain to be initialized. |
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167 | */ |
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168 | RTEMS_INLINE_ROUTINE void rtems_chain_initialize_empty( |
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169 | rtems_chain_control *the_chain |
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170 | ) |
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171 | { |
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172 | _Chain_Initialize_empty( the_chain ); |
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173 | } |
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174 | |
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175 | /** |
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176 | * @brief Set off chain. |
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177 | * |
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178 | * This function sets the next and previous fields of the @a node to NULL |
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179 | * indicating the @a node is not part of a chain. |
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180 | * |
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181 | * @param[in] node the node set to off chain. |
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182 | */ |
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183 | RTEMS_INLINE_ROUTINE void rtems_chain_set_off_chain( |
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184 | rtems_chain_node *node |
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185 | ) |
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186 | { |
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187 | _Chain_Set_off_chain( node ); |
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188 | } |
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189 | |
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190 | /** |
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191 | * @brief Is the node off chain. |
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192 | * |
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193 | * This function returns true if the @a node is not on a chain. A @a node is |
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194 | * off chain if the next and previous fields are set to NULL. |
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195 | * |
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196 | * @param[in] node is the node off chain. |
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197 | * |
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198 | * @retval true The node is off chain. |
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199 | * @retval false The node is not off chain. |
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200 | */ |
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201 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_node_off_chain( |
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202 | const rtems_chain_node *node |
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203 | ) |
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204 | { |
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205 | return _Chain_Is_node_off_chain( node ); |
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206 | } |
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207 | |
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208 | /** |
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209 | * @brief Is the chain node pointer NULL. |
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210 | * |
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211 | * This function returns true if the_node is NULL and false otherwise. |
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212 | * |
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213 | * @param[in] the_node is the node pointer to check. |
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214 | * |
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215 | * @retval true The chain node pointer is NULL. |
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216 | * @retval false The chain node pointer is not NULL. |
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217 | */ |
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218 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_null_node( |
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219 | const rtems_chain_node *the_node |
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220 | ) |
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221 | { |
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222 | return _Chain_Is_null_node( the_node ); |
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223 | } |
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224 | |
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225 | /** |
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226 | * @brief Return pointer to Chain Head |
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227 | * |
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228 | * This function returns a pointer to the first node on the chain. |
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229 | * |
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230 | * @param[in] the_chain is the chain to be operated upon. |
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231 | * |
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232 | * @return This method returns the permanent node of the chain. |
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233 | */ |
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234 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_head( |
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235 | rtems_chain_control *the_chain |
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236 | ) |
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237 | { |
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238 | return _Chain_Head( the_chain ); |
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239 | } |
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240 | |
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241 | /** |
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242 | * @brief Return pointer to immutable Chain Head |
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243 | * |
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244 | * This function returns a pointer to the head node on the chain. |
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245 | * |
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246 | * @param[in] the_chain is the chain to be operated upon. |
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247 | * |
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248 | * @return This method returns the permanent head node of the chain. |
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249 | */ |
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250 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_head( |
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251 | const rtems_chain_control *the_chain |
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252 | ) |
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253 | { |
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254 | return _Chain_Immutable_head( the_chain ); |
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255 | } |
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256 | |
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257 | /** |
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258 | * @brief Return pointer to Chain Tail |
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259 | * |
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260 | * This function returns a pointer to the tail node on the chain. |
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261 | * |
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262 | * @param[in] the_chain is the chain to be operated upon. |
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263 | * |
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264 | * @return This method returns the permanent tail node of the chain. |
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265 | */ |
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266 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_tail( |
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267 | rtems_chain_control *the_chain |
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268 | ) |
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269 | { |
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270 | return _Chain_Tail( the_chain ); |
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271 | } |
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272 | |
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273 | /** |
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274 | * @brief Return pointer to immutable Chain Tail |
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275 | * |
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276 | * This function returns a pointer to the tail node on the chain. |
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277 | * |
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278 | * @param[in] the_chain is the chain to be operated upon. |
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279 | * |
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280 | * @return This method returns the permanent tail node of the chain. |
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281 | */ |
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282 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_tail( |
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283 | const rtems_chain_control *the_chain |
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284 | ) |
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285 | { |
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286 | return _Chain_Immutable_tail( the_chain ); |
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287 | } |
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288 | |
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289 | /** |
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290 | * @brief Return pointer to Chain's First node after the permanent head. |
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291 | * |
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292 | * This function returns a pointer to the first node on the chain after the |
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293 | * head. |
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294 | * |
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295 | * @param[in] the_chain is the chain to be operated upon. |
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296 | * |
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297 | * @return This method returns the first node of the chain. |
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298 | */ |
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299 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_first( |
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300 | rtems_chain_control *the_chain |
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301 | ) |
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302 | { |
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303 | return _Chain_First( the_chain ); |
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304 | } |
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305 | |
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306 | /** |
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307 | * @brief Return pointer to immutable Chain's First node |
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308 | * |
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309 | * This function returns a pointer to the first node on the chain after the |
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310 | * head. |
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311 | * |
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312 | * @param[in] the_chain is the chain to be operated upon. |
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313 | * |
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314 | * @return This method returns the first node of the chain. |
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315 | */ |
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316 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_first( |
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317 | const rtems_chain_control *the_chain |
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318 | ) |
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319 | { |
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320 | return _Chain_Immutable_first( the_chain ); |
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321 | } |
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322 | |
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323 | /** |
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324 | * @brief Return pointer to Chain's Last node before the permanent tail. |
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325 | * |
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326 | * This function returns a pointer to the last node on the chain just before |
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327 | * the tail. |
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328 | * |
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329 | * @param[in] the_chain is the chain to be operated upon. |
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330 | * |
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331 | * @return This method returns the last node of the chain. |
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332 | */ |
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333 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_last( |
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334 | rtems_chain_control *the_chain |
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335 | ) |
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336 | { |
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337 | return _Chain_Last( the_chain ); |
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338 | } |
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339 | |
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340 | /** |
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341 | * @brief Return pointer to immutable Chain's Last node |
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342 | * |
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343 | * This function returns a pointer to the last node on the chain just before |
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344 | * the tail. |
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345 | * |
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346 | * @param[in] the_chain is the chain to be operated upon. |
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347 | * |
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348 | * @return This method returns the last node of the chain. |
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349 | */ |
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350 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_last( |
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351 | const rtems_chain_control *the_chain |
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352 | ) |
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353 | { |
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354 | return _Chain_Immutable_last( the_chain ); |
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355 | } |
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356 | |
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357 | /** |
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358 | * @brief Return pointer the next node from this node |
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359 | * |
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360 | * This function returns a pointer to the next node after this node. |
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361 | * |
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362 | * @param[in] the_node is the node to be operated upon. |
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363 | * |
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364 | * @return This method returns the next node on the chain. |
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365 | */ |
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366 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_next( |
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367 | rtems_chain_node *the_node |
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368 | ) |
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369 | { |
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370 | return _Chain_Next( the_node ); |
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371 | } |
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372 | |
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373 | /** |
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374 | * @brief Return pointer the immutable next node from this node |
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375 | * |
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376 | * This function returns a pointer to the next node after this node. |
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377 | * |
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378 | * @param[in] the_node is the node to be operated upon. |
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379 | * |
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380 | * @return This method returns the next node on the chain. |
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381 | */ |
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382 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_next( |
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383 | const rtems_chain_node *the_node |
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384 | ) |
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385 | { |
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386 | return _Chain_Immutable_next( the_node ); |
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387 | } |
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388 | |
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389 | /** |
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390 | * @brief Return pointer the previous node from this node |
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391 | * |
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392 | * This function returns a pointer to the previous node on this chain. |
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393 | * |
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394 | * @param[in] the_node is the node to be operated upon. |
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395 | * |
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396 | * @return This method returns the previous node on the chain. |
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397 | */ |
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398 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_previous( |
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399 | rtems_chain_node *the_node |
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400 | ) |
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401 | { |
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402 | return _Chain_Previous( the_node ); |
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403 | } |
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404 | |
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405 | /** |
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406 | * @brief Return pointer the immutable previous node from this node. |
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407 | * |
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408 | * This function returns a pointer to the previous node on this chain. |
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409 | * |
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410 | * @param[in] the_node is the node to be operated upon. |
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411 | * |
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412 | * @return This method returns the previous node on the chain. |
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413 | */ |
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414 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_previous( |
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415 | const rtems_chain_node *the_node |
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416 | ) |
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417 | { |
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418 | return _Chain_Immutable_previous( the_node ); |
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419 | } |
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420 | |
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421 | /** |
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422 | * @brief Are Two nodes equal. |
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423 | * |
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424 | * This function returns true if @a left and @a right are equal, |
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425 | * and false otherwise. |
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426 | * |
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427 | * @param[in] left is the node on the left hand side of the comparison. |
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428 | * @param[in] right is the node on the left hand side of the comparison. |
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429 | * |
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430 | * @retval true @a left is equal to @a right. |
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431 | * @retval false @a left is not equal to @a right |
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432 | */ |
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433 | RTEMS_INLINE_ROUTINE bool rtems_chain_are_nodes_equal( |
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434 | const rtems_chain_node *left, |
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435 | const rtems_chain_node *right |
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436 | ) |
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437 | { |
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438 | return _Chain_Are_nodes_equal( left, right ); |
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439 | } |
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440 | |
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441 | /** |
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442 | * @brief Is the chain empty |
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443 | * |
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444 | * This function returns true if there a no nodes on @a the_chain and |
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445 | * false otherwise. |
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446 | * |
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447 | * @param[in] the_chain is the chain to be operated upon. |
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448 | * |
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449 | * @retval true The chain is empty. |
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450 | * @retval false The chain is not empty. |
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451 | */ |
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452 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_empty( |
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453 | const rtems_chain_control *the_chain |
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454 | ) |
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455 | { |
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456 | return _Chain_Is_empty( the_chain ); |
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457 | } |
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458 | |
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459 | /** |
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460 | * @brief Is this the first node on the chain. |
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461 | * |
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462 | * This function returns true if the_node is the first node on a chain and |
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463 | * false otherwise. |
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464 | * |
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465 | * @param[in] the_node is the node the caller wants to know if it is |
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466 | * the first node on a chain. |
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467 | * |
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468 | * @retval true @a the_node is the first node on a chain. |
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469 | * @retval false @a the_node is not the first node on a chain. |
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470 | */ |
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471 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_first( |
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472 | const rtems_chain_node *the_node |
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473 | ) |
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474 | { |
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475 | return _Chain_Is_first( the_node ); |
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476 | } |
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477 | |
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478 | /** |
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479 | * @brief Is this the last node on the chain. |
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480 | * |
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481 | * This function returns true if @a the_node is the last node on a chain and |
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482 | * false otherwise. |
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483 | * |
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484 | * @param[in] the_node is the node to check as the last node. |
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485 | * |
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486 | * @retval true @a the_node is the last node on a chain. |
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487 | * @retval false @a the_node is not the last node on a chain |
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488 | */ |
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489 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_last( |
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490 | const rtems_chain_node *the_node |
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491 | ) |
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492 | { |
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493 | return _Chain_Is_last( the_node ); |
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494 | } |
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495 | |
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496 | /** |
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497 | * @brief Does this chain have only one node. |
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498 | * |
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499 | * This function returns true if there is only one node on @a the_chain and |
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500 | * false otherwise. |
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501 | * |
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502 | * @param[in] the_chain is the chain to be operated upon. |
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503 | * |
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504 | * @retval true The chain has only one node. |
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505 | * @retval false The chain has more than one nodes. |
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506 | */ |
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507 | RTEMS_INLINE_ROUTINE bool rtems_chain_has_only_one_node( |
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508 | const rtems_chain_control *the_chain |
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509 | ) |
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510 | { |
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511 | return _Chain_Has_only_one_node( the_chain ); |
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512 | } |
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513 | |
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514 | /** |
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515 | * @brief Is this node the chain head. |
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516 | * |
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517 | * This function returns true if @a the_node is the head of the_chain and |
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518 | * false otherwise. |
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519 | * |
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520 | * @param[in] the_chain is the chain to be operated upon. |
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521 | * @param[in] the_node is the node to check for being the Chain Head. |
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522 | * |
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523 | * @retval true @a the_node is the head of @a the_chain. |
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524 | * @retval false @a the_node is not the head of @a the_chain. |
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525 | */ |
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526 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_head( |
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527 | const rtems_chain_control *the_chain, |
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528 | const rtems_chain_node *the_node |
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529 | ) |
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530 | { |
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531 | return _Chain_Is_head( the_chain, the_node ); |
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532 | } |
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533 | |
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534 | /** |
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535 | * @brief Is this node the chain tail. |
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536 | * |
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537 | * This function returns true if the_node is the tail of the_chain and |
---|
538 | * false otherwise. |
---|
539 | * |
---|
540 | * @param[in] the_chain is the chain to be operated upon. |
---|
541 | * @param[in] the_node is the node to check for being the Chain Tail. |
---|
542 | * |
---|
543 | * @retval true @a the_node is the tail of @a the_chain. |
---|
544 | * @retval false @a the_node is not the tail of @a the_chain. |
---|
545 | */ |
---|
546 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_tail( |
---|
547 | const rtems_chain_control *the_chain, |
---|
548 | const rtems_chain_node *the_node |
---|
549 | ) |
---|
550 | { |
---|
551 | return _Chain_Is_tail( the_chain, the_node ); |
---|
552 | } |
---|
553 | |
---|
554 | /** |
---|
555 | * @brief Extract the specified node from a chain. |
---|
556 | * |
---|
557 | * This routine extracts @a the_node from the chain on which it resides. |
---|
558 | * It disables interrupts to ensure the atomicity of the |
---|
559 | * extract operation. |
---|
560 | * |
---|
561 | * @arg the_node specifies the node to extract |
---|
562 | */ |
---|
563 | void rtems_chain_extract( |
---|
564 | rtems_chain_node *the_node |
---|
565 | ); |
---|
566 | |
---|
567 | /** |
---|
568 | * @brief Extract the specified node from a chain (unprotected). |
---|
569 | * |
---|
570 | * This routine extracts @a the_node from the chain on which it resides. |
---|
571 | * |
---|
572 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
573 | * append operation. |
---|
574 | */ |
---|
575 | RTEMS_INLINE_ROUTINE void rtems_chain_extract_unprotected( |
---|
576 | rtems_chain_node *the_node |
---|
577 | ) |
---|
578 | { |
---|
579 | _Chain_Extract_unprotected( the_node ); |
---|
580 | } |
---|
581 | |
---|
582 | /** |
---|
583 | * @brief Obtain the first node on a chain. |
---|
584 | * |
---|
585 | * This function removes the first node from @a the_chain and returns |
---|
586 | * a pointer to that node. If @a the_chain is empty, then NULL is returned. |
---|
587 | * |
---|
588 | * @return This method returns a pointer a node. If a node was removed, |
---|
589 | * then a pointer to that node is returned. If @a the_chain was |
---|
590 | * empty, then NULL is returned. |
---|
591 | * |
---|
592 | * NOTE: It disables interrupts to ensure the atomicity of the get operation. |
---|
593 | */ |
---|
594 | rtems_chain_node *rtems_chain_get( |
---|
595 | rtems_chain_control *the_chain |
---|
596 | ); |
---|
597 | |
---|
598 | /** |
---|
599 | * @brief See _Chain_Get_unprotected(). |
---|
600 | */ |
---|
601 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_get_unprotected( |
---|
602 | rtems_chain_control *the_chain |
---|
603 | ) |
---|
604 | { |
---|
605 | return _Chain_Get_unprotected( the_chain ); |
---|
606 | } |
---|
607 | |
---|
608 | /** |
---|
609 | * @brief See _Chain_Get_first_unprotected(). |
---|
610 | */ |
---|
611 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_get_first_unprotected( |
---|
612 | rtems_chain_control *the_chain |
---|
613 | ) |
---|
614 | { |
---|
615 | return _Chain_Get_first_unprotected( the_chain ); |
---|
616 | } |
---|
617 | |
---|
618 | /** |
---|
619 | * @brief Insert a node on a chain |
---|
620 | * |
---|
621 | * This routine inserts @a the_node on a chain immediately following |
---|
622 | * @a after_node. |
---|
623 | * |
---|
624 | * NOTE: It disables interrupts to ensure the atomicity |
---|
625 | * of the extract operation. |
---|
626 | */ |
---|
627 | void rtems_chain_insert( |
---|
628 | rtems_chain_node *after_node, |
---|
629 | rtems_chain_node *the_node |
---|
630 | ); |
---|
631 | |
---|
632 | /** |
---|
633 | * @brief See _Chain_Insert_unprotected(). |
---|
634 | */ |
---|
635 | RTEMS_INLINE_ROUTINE void rtems_chain_insert_unprotected( |
---|
636 | rtems_chain_node *after_node, |
---|
637 | rtems_chain_node *the_node |
---|
638 | ) |
---|
639 | { |
---|
640 | _Chain_Insert_unprotected( after_node, the_node ); |
---|
641 | } |
---|
642 | |
---|
643 | /** |
---|
644 | * @brief Append a node on the end of a chain. |
---|
645 | * |
---|
646 | * This routine appends @a the_node onto the end of @a the_chain. |
---|
647 | * |
---|
648 | * NOTE: It disables interrupts to ensure the atomicity of the |
---|
649 | * append operation. |
---|
650 | */ |
---|
651 | void rtems_chain_append( |
---|
652 | rtems_chain_control *the_chain, |
---|
653 | rtems_chain_node *the_node |
---|
654 | ); |
---|
655 | |
---|
656 | /** |
---|
657 | * @brief Append a node on the end of a chain (unprotected). |
---|
658 | * |
---|
659 | * This routine appends @a the_node onto the end of @a the_chain. |
---|
660 | * |
---|
661 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
662 | * append operation. |
---|
663 | */ |
---|
664 | RTEMS_INLINE_ROUTINE void rtems_chain_append_unprotected( |
---|
665 | rtems_chain_control *the_chain, |
---|
666 | rtems_chain_node *the_node |
---|
667 | ) |
---|
668 | { |
---|
669 | _Chain_Append_unprotected( the_chain, the_node ); |
---|
670 | } |
---|
671 | |
---|
672 | /** |
---|
673 | * @brief Prepend a node. |
---|
674 | * |
---|
675 | * This routine prepends the_node onto the front of the_chain. |
---|
676 | * |
---|
677 | * @param[in] the_chain is the chain to be operated upon. |
---|
678 | * @param[in] the_node is the node to be prepended. |
---|
679 | * |
---|
680 | * NOTE: It disables interrupts to ensure the atomicity of the |
---|
681 | * prepend operation. |
---|
682 | */ |
---|
683 | void rtems_chain_prepend( |
---|
684 | rtems_chain_control *the_chain, |
---|
685 | rtems_chain_node *the_node |
---|
686 | ); |
---|
687 | |
---|
688 | /** |
---|
689 | * @brief Prepend a node (unprotected). |
---|
690 | * |
---|
691 | * This routine prepends the_node onto the front of the_chain. |
---|
692 | * |
---|
693 | * @param[in] the_chain is the chain to be operated upon. |
---|
694 | * @param[in] the_node is the node to be prepended. |
---|
695 | * |
---|
696 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
697 | * prepend operation. |
---|
698 | */ |
---|
699 | RTEMS_INLINE_ROUTINE void rtems_chain_prepend_unprotected( |
---|
700 | rtems_chain_control *the_chain, |
---|
701 | rtems_chain_node *the_node |
---|
702 | ) |
---|
703 | { |
---|
704 | _Chain_Prepend_unprotected( the_chain, the_node ); |
---|
705 | } |
---|
706 | |
---|
707 | /** |
---|
708 | * @brief Checks if the @a chain is empty and appends the @a node. |
---|
709 | * |
---|
710 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
711 | * |
---|
712 | * @retval true The chain was empty before the append. |
---|
713 | * @retval false The chain contained at least one node before the append. |
---|
714 | */ |
---|
715 | bool rtems_chain_append_with_empty_check( |
---|
716 | rtems_chain_control *chain, |
---|
717 | rtems_chain_node *node |
---|
718 | ); |
---|
719 | |
---|
720 | /** |
---|
721 | * @brief Checks if the @a chain is empty and prepends the @a node. |
---|
722 | * |
---|
723 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
724 | * |
---|
725 | * @retval true The chain was empty before the prepend. |
---|
726 | * @retval false The chain contained at least one node before the prepend. |
---|
727 | */ |
---|
728 | bool rtems_chain_prepend_with_empty_check( |
---|
729 | rtems_chain_control *chain, |
---|
730 | rtems_chain_node *node |
---|
731 | ); |
---|
732 | |
---|
733 | /** |
---|
734 | * @brief Tries to get the first @a node and check if the @a chain is empty |
---|
735 | * afterwards. |
---|
736 | * |
---|
737 | * This function removes the first node from the @a chain and returns a pointer |
---|
738 | * to that node in @a node. If the @a chain is empty, then @c NULL is returned. |
---|
739 | * |
---|
740 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
741 | * |
---|
742 | * @retval true The chain is empty after the node removal. |
---|
743 | * @retval false The chain contained at least one node after the node removal. |
---|
744 | */ |
---|
745 | bool rtems_chain_get_with_empty_check( |
---|
746 | rtems_chain_control *chain, |
---|
747 | rtems_chain_node **node |
---|
748 | ); |
---|
749 | |
---|
750 | /** |
---|
751 | * @brief Returns the node count of the chain. |
---|
752 | * |
---|
753 | * @param[in] chain The chain. |
---|
754 | * |
---|
755 | * @note It does NOT disable interrupts to ensure the atomicity of the |
---|
756 | * operation. |
---|
757 | * |
---|
758 | * @return The node count of the chain. |
---|
759 | */ |
---|
760 | RTEMS_INLINE_ROUTINE size_t rtems_chain_node_count_unprotected( |
---|
761 | const rtems_chain_control *chain |
---|
762 | ) |
---|
763 | { |
---|
764 | return _Chain_Node_count_unprotected( chain ); |
---|
765 | } |
---|
766 | |
---|
767 | /** @} */ |
---|
768 | |
---|
769 | #ifdef __cplusplus |
---|
770 | } |
---|
771 | #endif |
---|
772 | |
---|
773 | #endif |
---|
774 | /* end of include file */ |
---|