1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSScoreWatchdog |
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5 | * |
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6 | * @brief This header file provides interfaces of the |
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7 | * @ref RTEMSScoreWatchdog which are only used by the implementation. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 1989-2004. |
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12 | * On-Line Applications Research Corporation (OAR). |
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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.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifndef _RTEMS_SCORE_WATCHDOGIMPL_H |
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20 | #define _RTEMS_SCORE_WATCHDOGIMPL_H |
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21 | |
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22 | #include <rtems/score/watchdog.h> |
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23 | #include <rtems/score/watchdogticks.h> |
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24 | #include <rtems/score/assert.h> |
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25 | #include <rtems/score/isrlock.h> |
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26 | #include <rtems/score/percpu.h> |
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27 | #include <rtems/score/rbtreeimpl.h> |
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28 | |
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29 | #include <sys/types.h> |
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30 | #include <sys/timespec.h> |
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31 | |
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32 | #ifdef __cplusplus |
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33 | extern "C" { |
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34 | #endif |
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35 | |
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36 | /** |
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37 | * @addtogroup RTEMSScoreWatchdog |
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38 | * |
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39 | * @{ |
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40 | */ |
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41 | |
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42 | /** |
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43 | * @brief Watchdog states. |
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44 | */ |
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45 | typedef enum { |
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46 | /** |
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47 | * @brief The watchdog is scheduled and a black node in the red-black tree. |
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48 | */ |
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49 | WATCHDOG_SCHEDULED_BLACK, |
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50 | |
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51 | /** |
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52 | * @brief The watchdog is scheduled and a red node in the red-black tree. |
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53 | */ |
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54 | WATCHDOG_SCHEDULED_RED, |
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55 | |
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56 | /** |
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57 | * @brief The watchdog is inactive. |
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58 | */ |
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59 | WATCHDOG_INACTIVE, |
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60 | |
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61 | /** |
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62 | * @brief The watchdog is on a chain of pending watchdogs. |
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63 | * |
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64 | * This state is used by the timer server for example. |
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65 | */ |
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66 | WATCHDOG_PENDING |
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67 | } Watchdog_State; |
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68 | |
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69 | /** |
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70 | * @brief Watchdog initializer for static initialization. |
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71 | * |
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72 | * The processor of this watchdog is set to processor with index zero. |
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73 | * |
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74 | * @see _Watchdog_Preinitialize(). |
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75 | */ |
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76 | #if defined(RTEMS_SMP) |
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77 | #define WATCHDOG_INITIALIZER( routine ) \ |
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78 | { \ |
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79 | { { { NULL, NULL, NULL, WATCHDOG_INACTIVE } } }, \ |
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80 | &_Per_CPU_Information[ 0 ].per_cpu, \ |
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81 | ( routine ), \ |
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82 | 0 \ |
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83 | } |
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84 | #else |
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85 | #define WATCHDOG_INITIALIZER( routine ) \ |
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86 | { \ |
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87 | { { { NULL, NULL, NULL, WATCHDOG_INACTIVE } } }, \ |
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88 | ( routine ), \ |
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89 | 0 \ |
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90 | } |
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91 | #endif |
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92 | |
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93 | /** |
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94 | * @brief Initializes the watchdog header. |
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95 | * |
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96 | * @param[out] header The header to initialize. |
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97 | */ |
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98 | RTEMS_INLINE_ROUTINE void _Watchdog_Header_initialize( |
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99 | Watchdog_Header *header |
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100 | ) |
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101 | { |
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102 | _RBTree_Initialize_empty( &header->Watchdogs ); |
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103 | header->first = NULL; |
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104 | } |
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105 | |
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106 | /** |
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107 | * @brief Returns the first of the watchdog header. |
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108 | * |
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109 | * @param header The watchdog header to remove the first of. |
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110 | * |
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111 | * @return The first of @a header. |
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112 | */ |
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113 | RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Header_first( |
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114 | const Watchdog_Header *header |
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115 | ) |
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116 | { |
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117 | return (Watchdog_Control *) header->first; |
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118 | } |
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119 | |
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120 | /** |
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121 | * @brief Destroys the watchdog header. |
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122 | * |
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123 | * @param header The watchdog header to destroy. |
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124 | */ |
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125 | RTEMS_INLINE_ROUTINE void _Watchdog_Header_destroy( |
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126 | Watchdog_Header *header |
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127 | ) |
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128 | { |
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129 | /* Do nothing */ |
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130 | (void) header; |
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131 | } |
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132 | |
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133 | /** |
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134 | * @brief Performs a watchdog tick. |
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135 | * |
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136 | * @param cpu The processor for this watchdog tick. |
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137 | */ |
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138 | void _Watchdog_Tick( struct Per_CPU_Control *cpu ); |
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139 | |
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140 | /** |
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141 | * @brief Gets the state of the watchdog. |
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142 | * |
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143 | * @param the_watchdog The watchdog to get the state of. |
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144 | * |
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145 | * @return The RB_COLOR of @a the_watchdog. |
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146 | */ |
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147 | RTEMS_INLINE_ROUTINE Watchdog_State _Watchdog_Get_state( |
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148 | const Watchdog_Control *the_watchdog |
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149 | ) |
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150 | { |
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151 | return (Watchdog_State) RB_COLOR( &the_watchdog->Node.RBTree, Node ); |
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152 | } |
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153 | |
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154 | /** |
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155 | * @brief Sets the state of the watchdog. |
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156 | * |
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157 | * @param[out] the_watchdog The watchdog to set the state of. |
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158 | * @param state The state to set the watchdog to. |
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159 | */ |
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160 | RTEMS_INLINE_ROUTINE void _Watchdog_Set_state( |
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161 | Watchdog_Control *the_watchdog, |
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162 | Watchdog_State state |
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163 | ) |
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164 | { |
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165 | RB_COLOR( &the_watchdog->Node.RBTree, Node ) = state; |
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166 | } |
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167 | |
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168 | /** |
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169 | * @brief Gets the watchdog's cpu. |
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170 | * |
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171 | * @param the_watchdog The watchdog to get the cpu of. |
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172 | * |
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173 | * @return The cpu of the watchdog. |
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174 | */ |
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175 | RTEMS_INLINE_ROUTINE Per_CPU_Control *_Watchdog_Get_CPU( |
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176 | const Watchdog_Control *the_watchdog |
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177 | ) |
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178 | { |
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179 | #if defined(RTEMS_SMP) |
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180 | return the_watchdog->cpu; |
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181 | #else |
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182 | return _Per_CPU_Get_by_index( 0 ); |
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183 | #endif |
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184 | } |
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185 | |
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186 | /** |
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187 | * @brief Sets the cpu for the watchdog. |
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188 | * |
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189 | * @param[out] the_watchdog The watchdog to set the cpu of. |
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190 | * @param cpu The cpu to be set as @a the_watchdog's cpu. |
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191 | */ |
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192 | RTEMS_INLINE_ROUTINE void _Watchdog_Set_CPU( |
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193 | Watchdog_Control *the_watchdog, |
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194 | Per_CPU_Control *cpu |
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195 | ) |
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196 | { |
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197 | #if defined(RTEMS_SMP) |
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198 | the_watchdog->cpu = cpu; |
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199 | #else |
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200 | (void) cpu; |
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201 | #endif |
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202 | } |
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203 | |
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204 | /** |
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205 | * @brief Pre-initializes a watchdog. |
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206 | * |
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207 | * This routine must be called before a watchdog is used in any way. The |
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208 | * exception are statically initialized watchdogs via WATCHDOG_INITIALIZER(). |
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209 | * |
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210 | * @param[out] the_watchdog The uninitialized watchdog. |
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211 | */ |
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212 | RTEMS_INLINE_ROUTINE void _Watchdog_Preinitialize( |
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213 | Watchdog_Control *the_watchdog, |
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214 | Per_CPU_Control *cpu |
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215 | ) |
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216 | { |
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217 | _Watchdog_Set_CPU( the_watchdog, cpu ); |
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218 | _Watchdog_Set_state( the_watchdog, WATCHDOG_INACTIVE ); |
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219 | |
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220 | #if defined(RTEMS_DEBUG) |
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221 | the_watchdog->routine = NULL; |
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222 | the_watchdog->expire = 0; |
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223 | #endif |
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224 | } |
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225 | |
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226 | /** |
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227 | * @brief Initializes a watchdog with a new service routine. |
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228 | * |
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229 | * The watchdog must be inactive. |
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230 | * |
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231 | * @param[out] the_watchdog The watchdog to initialize. |
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232 | * @param routing The service routine for @a the_watchdog. |
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233 | */ |
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234 | RTEMS_INLINE_ROUTINE void _Watchdog_Initialize( |
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235 | Watchdog_Control *the_watchdog, |
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236 | Watchdog_Service_routine_entry routine |
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237 | ) |
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238 | { |
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239 | _Assert( _Watchdog_Get_state( the_watchdog ) == WATCHDOG_INACTIVE ); |
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240 | the_watchdog->routine = routine; |
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241 | } |
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242 | |
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243 | /** |
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244 | * @brief Calls the routine of each not expired watchdog control node. |
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245 | * |
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246 | * @param header The watchdog header. |
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247 | * @param first The first watchdog control node. |
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248 | * @param now The current time to check the expiration time against. |
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249 | * @param lock The lock that is released before calling the routine and then |
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250 | * acquired after the call. |
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251 | * @param lock_context The lock context for the release before calling the |
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252 | * routine and for the acquire after. |
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253 | */ |
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254 | void _Watchdog_Do_tickle( |
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255 | Watchdog_Header *header, |
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256 | Watchdog_Control *first, |
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257 | uint64_t now, |
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258 | #if defined(RTEMS_SMP) |
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259 | ISR_lock_Control *lock, |
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260 | #endif |
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261 | ISR_lock_Context *lock_context |
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262 | ); |
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263 | |
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264 | #if defined(RTEMS_SMP) |
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265 | #define _Watchdog_Tickle( header, first, now, lock, lock_context ) \ |
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266 | _Watchdog_Do_tickle( header, first, now, lock, lock_context ) |
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267 | #else |
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268 | #define _Watchdog_Tickle( header, first, now, lock, lock_context ) \ |
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269 | _Watchdog_Do_tickle( header, first, now, lock_context ) |
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270 | #endif |
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271 | |
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272 | /** |
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273 | * @brief Inserts a watchdog into the set of scheduled watchdogs according to |
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274 | * the specified expiration time. |
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275 | * |
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276 | * The watchdog must be inactive. |
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277 | * |
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278 | * @param[in, out] header The set of scheduler watchdogs to insert into. |
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279 | * @param[in, out] the_watchdog The watchdog to insert. |
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280 | * @param expire The expiration time for the watchdog. |
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281 | */ |
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282 | void _Watchdog_Insert( |
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283 | Watchdog_Header *header, |
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284 | Watchdog_Control *the_watchdog, |
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285 | uint64_t expire |
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286 | ); |
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287 | |
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288 | /** |
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289 | * @brief In the case the watchdog is scheduled, then it is removed from the set of |
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290 | * scheduled watchdogs. |
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291 | * |
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292 | * The watchdog must be initialized before this call. |
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293 | * |
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294 | * @param[in, out] header The scheduled watchdogs. |
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295 | * @param[in, out] the_watchdog The watchdog to remove. |
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296 | */ |
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297 | void _Watchdog_Remove( |
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298 | Watchdog_Header *header, |
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299 | Watchdog_Control *the_watchdog |
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300 | ); |
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301 | |
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302 | /** |
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303 | * @brief In the case the watchdog is scheduled, then it is removed from the set of |
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304 | * scheduled watchdogs. |
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305 | * |
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306 | * The watchdog must be initialized before this call. |
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307 | * |
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308 | * @param[in, out] header The scheduled watchdogs. |
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309 | * @param[in, out] the_watchdog The watchdog to remove. |
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310 | * @param now The current time. |
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311 | * |
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312 | * @retval other The difference of the now and expiration time. |
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313 | * @retval 0 The now time is greater than or equal to the expiration time of |
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314 | * the watchdog. |
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315 | */ |
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316 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Cancel( |
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317 | Watchdog_Header *header, |
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318 | Watchdog_Control *the_watchdog, |
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319 | uint64_t now |
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320 | ) |
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321 | { |
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322 | uint64_t expire; |
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323 | uint64_t remaining; |
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324 | |
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325 | expire = the_watchdog->expire; |
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326 | |
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327 | if ( now < expire ) { |
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328 | remaining = expire - now; |
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329 | } else { |
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330 | remaining = 0; |
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331 | } |
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332 | |
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333 | _Watchdog_Remove( header, the_watchdog ); |
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334 | |
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335 | return remaining; |
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336 | } |
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337 | |
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338 | /** |
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339 | * @brief Checks if the watchdog is scheduled. |
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340 | * |
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341 | * @param the_watchdog The watchdog for the verification. |
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342 | * |
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343 | * @retval true The watchdog is scheduled. |
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344 | * @retval false The watchdog is inactive. |
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345 | */ |
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346 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_scheduled( |
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347 | const Watchdog_Control *the_watchdog |
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348 | ) |
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349 | { |
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350 | return _Watchdog_Get_state( the_watchdog ) < WATCHDOG_INACTIVE; |
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351 | } |
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352 | |
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353 | /** |
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354 | * @brief Sets the first watchdog of the watchdog collection to the next |
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355 | * watchdog of the current first watchdog. |
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356 | * |
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357 | * This function may be used during watchdog removals, see _Watchdog_Remove() |
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358 | * and _Watchdog_Tickle(). |
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359 | * |
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360 | * @param[in, out] header is the watchdog collection header. |
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361 | * |
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362 | * @param first is the current first watchdog which should be removed |
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363 | * afterwards. |
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364 | */ |
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365 | RTEMS_INLINE_ROUTINE void _Watchdog_Next_first( |
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366 | Watchdog_Header *header, |
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367 | const Watchdog_Control *first |
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368 | ) |
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369 | { |
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370 | RBTree_Node *right; |
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371 | |
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372 | /* |
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373 | * This function uses the following properties of red-black trees: |
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374 | * |
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375 | * 1. Every leaf (NULL) is black. |
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376 | * |
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377 | * 2. If a node is red, then both its children are black. |
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378 | * |
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379 | * 3. Every simple path from a node to a descendant leaf contains the same |
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380 | * number of black nodes. |
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381 | * |
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382 | * The first node has no left child. So every path from the first node has |
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383 | * exactly one black node (including leafs). The first node cannot have a |
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384 | * non-leaf black right child. It may have a red right child. In this case |
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385 | * both children must be leafs. |
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386 | */ |
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387 | _Assert( header->first == &first->Node.RBTree ); |
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388 | _Assert( _RBTree_Left( &first->Node.RBTree ) == NULL ); |
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389 | right = _RBTree_Right( &first->Node.RBTree ); |
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390 | |
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391 | if ( right != NULL ) { |
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392 | _Assert( RB_COLOR( right, Node ) == RB_RED ); |
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393 | _Assert( _RBTree_Left( right ) == NULL ); |
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394 | _Assert( _RBTree_Right( right ) == NULL ); |
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395 | header->first = right; |
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396 | } else { |
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397 | header->first = _RBTree_Parent( &first->Node.RBTree ); |
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398 | } |
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399 | } |
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400 | |
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401 | /** |
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402 | * @brief The maximum watchdog ticks value for the far future. |
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403 | */ |
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404 | #define WATCHDOG_MAXIMUM_TICKS UINT64_MAX |
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405 | |
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406 | #define WATCHDOG_NANOSECONDS_PER_SECOND 1000000000 |
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407 | |
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408 | /** |
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409 | * @brief The bits necessary to store 1000000000 |
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410 | * (= WATCHDOG_NANOSECONDS_PER_SECOND) nanoseconds. |
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411 | * |
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412 | * The expiration time is an unsigned 64-bit integer. To store nanoseconds |
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413 | * timeouts we use 30 bits (2**30 == 1073741824) for the nanoseconds and 34 |
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414 | * bits for the seconds since UNIX Epoch. This leads to a year 2514 problem. |
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415 | */ |
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416 | #define WATCHDOG_BITS_FOR_1E9_NANOSECONDS 30 |
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417 | |
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418 | /** |
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419 | * @brief The maximum number of seconds representable in the nanoseconds |
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420 | * watchdog format. |
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421 | * |
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422 | * We have 2**34 bits for the seconds part. |
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423 | */ |
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424 | #define WATCHDOG_MAX_SECONDS 0x3ffffffff |
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425 | |
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426 | /** |
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427 | * @brief Checks if the timespec is a valid timespec for a watchdog. |
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428 | * |
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429 | * @param ts The timespec for the verification. |
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430 | * |
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431 | * @retval true The timespec is a valid timespec. |
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432 | * @retval false The timespec is invalid. |
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433 | */ |
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434 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_valid_timespec( |
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435 | const struct timespec *ts |
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436 | ) |
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437 | { |
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438 | return ts != NULL |
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439 | && (unsigned long) ts->tv_nsec < WATCHDOG_NANOSECONDS_PER_SECOND; |
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440 | } |
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441 | |
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442 | /** |
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443 | * @brief Checks if the timespec is a valid interval timespec for a watchdog. |
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444 | * |
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445 | * @param ts The timespec for the verification. |
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446 | * |
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447 | * @retval true The timespec is a valid interval timespec. |
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448 | * @retval false The timespec is invalid. |
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449 | */ |
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450 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_valid_interval_timespec( |
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451 | const struct timespec *ts |
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452 | ) |
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453 | { |
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454 | return _Watchdog_Is_valid_timespec( ts ) && ts->tv_sec >= 0; |
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455 | } |
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456 | |
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457 | /** |
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458 | * @brief Adds the delta timespec to the current time if the delta is a valid |
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459 | * interval timespec. |
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460 | * |
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461 | * @param[in, out] now The current time. |
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462 | * @param delta The delta timespec for the addition. |
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463 | * |
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464 | * @retval pointer Pointer to the now timespec. |
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465 | * @retval NULL @a delta is not a valid interval timespec. |
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466 | */ |
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467 | RTEMS_INLINE_ROUTINE const struct timespec * _Watchdog_Future_timespec( |
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468 | struct timespec *now, |
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469 | const struct timespec *delta |
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470 | ) |
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471 | { |
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472 | uint64_t sec; |
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473 | |
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474 | if ( !_Watchdog_Is_valid_interval_timespec( delta ) ) { |
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475 | return NULL; |
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476 | } |
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477 | |
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478 | sec = (uint64_t) now->tv_sec; |
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479 | sec += (uint64_t) delta->tv_sec; |
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480 | now->tv_nsec += delta->tv_nsec; |
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481 | |
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482 | /* We have 2 * (2**63 - 1) + 1 == UINT64_MAX */ |
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483 | if ( now->tv_nsec >= WATCHDOG_NANOSECONDS_PER_SECOND ) { |
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484 | now->tv_nsec -= WATCHDOG_NANOSECONDS_PER_SECOND; |
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485 | ++sec; |
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486 | } |
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487 | |
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488 | if ( sec <= INT64_MAX ) { |
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489 | now->tv_sec = sec; |
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490 | } else { |
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491 | now->tv_sec = INT64_MAX; |
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492 | } |
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493 | |
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494 | return now; |
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495 | } |
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496 | |
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497 | /** |
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498 | * @brief Checks if the timespec is too far in the future. |
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499 | * |
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500 | * @param ts The timespec for the verification. |
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501 | * |
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502 | * @retval true @a ts is too far in the future. |
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503 | * @retval false @a ts is not too far in the future. |
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504 | */ |
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505 | RTEMS_INLINE_ROUTINE bool _Watchdog_Is_far_future_timespec( |
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506 | const struct timespec *ts |
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507 | ) |
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508 | { |
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509 | return ts->tv_sec > WATCHDOG_MAX_SECONDS; |
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510 | } |
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511 | |
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512 | /** |
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513 | * @brief Converts the seconds to ticks. |
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514 | * |
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515 | * @param seconds The seconds to convert to ticks. |
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516 | * |
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517 | * @return @a seconds converted to ticks. |
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518 | */ |
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519 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Ticks_from_seconds( |
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520 | uint32_t seconds |
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521 | ) |
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522 | { |
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523 | uint64_t ticks = seconds; |
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524 | |
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525 | ticks <<= WATCHDOG_BITS_FOR_1E9_NANOSECONDS; |
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526 | |
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527 | return ticks; |
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528 | } |
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529 | |
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530 | /** |
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531 | * @brief Converts the timespec in ticks. |
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532 | * |
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533 | * @param ts The timespec to convert to ticks. |
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534 | * |
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535 | * @return @a ts converted to ticks. |
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536 | */ |
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537 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Ticks_from_timespec( |
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538 | const struct timespec *ts |
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539 | ) |
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540 | { |
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541 | uint64_t ticks; |
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542 | |
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543 | _Assert( _Watchdog_Is_valid_timespec( ts ) ); |
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544 | _Assert( ts->tv_sec >= 0 ); |
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545 | _Assert( !_Watchdog_Is_far_future_timespec( ts ) ); |
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546 | |
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547 | ticks = (uint64_t) ts->tv_sec; |
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548 | ticks <<= WATCHDOG_BITS_FOR_1E9_NANOSECONDS; |
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549 | ticks |= (uint32_t) ts->tv_nsec; |
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550 | |
---|
551 | return ticks; |
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552 | } |
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553 | |
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554 | /** |
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555 | * @brief Converts the ticks to timespec. |
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556 | * |
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557 | * @param ticks are the ticks to convert. |
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558 | * |
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559 | * @param[out] ts is the timespec to return the converted ticks. |
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560 | */ |
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561 | RTEMS_INLINE_ROUTINE void _Watchdog_Ticks_to_timespec( |
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562 | uint64_t ticks, |
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563 | struct timespec *ts |
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564 | ) |
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565 | { |
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566 | ts->tv_sec = ticks >> WATCHDOG_BITS_FOR_1E9_NANOSECONDS; |
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567 | ts->tv_nsec = ticks & ( ( 1U << WATCHDOG_BITS_FOR_1E9_NANOSECONDS ) - 1 ); |
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568 | } |
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569 | |
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570 | /** |
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571 | * @brief Converts the sbintime in ticks. |
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572 | * |
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573 | * @param sbt The sbintime to convert to ticks. |
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574 | * |
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575 | * @return @a sbt converted to ticks. |
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576 | */ |
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577 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Ticks_from_sbintime( int64_t sbt ) |
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578 | { |
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579 | uint64_t ticks = ( sbt >> 32 ) << WATCHDOG_BITS_FOR_1E9_NANOSECONDS; |
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580 | |
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581 | ticks |= ( (uint64_t) 1000000000 * (uint32_t) sbt ) >> 32; |
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582 | |
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583 | return ticks; |
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584 | } |
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585 | |
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586 | /** |
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587 | * @brief Acquires the per cpu watchdog lock in a critical section. |
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588 | * |
---|
589 | * @param cpu The cpu to acquire the watchdog lock of. |
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590 | * @param lock_context The lock context. |
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591 | */ |
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592 | RTEMS_INLINE_ROUTINE void _Watchdog_Per_CPU_acquire_critical( |
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593 | Per_CPU_Control *cpu, |
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594 | ISR_lock_Context *lock_context |
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595 | ) |
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596 | { |
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597 | _ISR_lock_Acquire( &cpu->Watchdog.Lock, lock_context ); |
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598 | } |
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599 | |
---|
600 | /** |
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601 | * @brief Releases the per cpu watchdog lock in a critical section. |
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602 | * |
---|
603 | * @param cpu The cpu to release the watchdog lock of. |
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604 | * @param lock_context The lock context. |
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605 | */ |
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606 | RTEMS_INLINE_ROUTINE void _Watchdog_Per_CPU_release_critical( |
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607 | Per_CPU_Control *cpu, |
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608 | ISR_lock_Context *lock_context |
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609 | ) |
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610 | { |
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611 | _ISR_lock_Release( &cpu->Watchdog.Lock, lock_context ); |
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612 | } |
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613 | |
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614 | /** |
---|
615 | * @brief Sets the watchdog's cpu to the given instance and sets its expiration |
---|
616 | * time to the watchdog expiration time of the cpu plus the ticks. |
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617 | * |
---|
618 | * @param[in, out] the_watchdog The watchdog to set the cpu and expiration time of. |
---|
619 | * @param cpu The cpu for the watchdog. |
---|
620 | * @param ticks The ticks to add to the expiration time. |
---|
621 | * |
---|
622 | * @return The new expiration time of the watchdog. |
---|
623 | */ |
---|
624 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Per_CPU_insert_ticks( |
---|
625 | Watchdog_Control *the_watchdog, |
---|
626 | Per_CPU_Control *cpu, |
---|
627 | Watchdog_Interval ticks |
---|
628 | ) |
---|
629 | { |
---|
630 | ISR_lock_Context lock_context; |
---|
631 | Watchdog_Header *header; |
---|
632 | uint64_t expire; |
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633 | |
---|
634 | header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ]; |
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635 | |
---|
636 | _Watchdog_Set_CPU( the_watchdog, cpu ); |
---|
637 | |
---|
638 | _Watchdog_Per_CPU_acquire_critical( cpu, &lock_context ); |
---|
639 | expire = ticks + cpu->Watchdog.ticks; |
---|
640 | _Watchdog_Insert(header, the_watchdog, expire); |
---|
641 | _Watchdog_Per_CPU_release_critical( cpu, &lock_context ); |
---|
642 | return expire; |
---|
643 | } |
---|
644 | |
---|
645 | /** |
---|
646 | * @brief Sets the watchdog's cpu and inserts it with the given expiration time |
---|
647 | * in the scheduled watchdogs. |
---|
648 | * |
---|
649 | * @param[in, out] the_watchdog The watchdog to set cpu and expiration time of. |
---|
650 | * @param cpu The cpu for the operation. |
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651 | * @param[in, out] header The scheduled watchdogs. |
---|
652 | * @param expire The expiration time for the watchdog. |
---|
653 | * |
---|
654 | * @return The expiration time of the watchdog. |
---|
655 | */ |
---|
656 | RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Per_CPU_insert( |
---|
657 | Watchdog_Control *the_watchdog, |
---|
658 | Per_CPU_Control *cpu, |
---|
659 | Watchdog_Header *header, |
---|
660 | uint64_t expire |
---|
661 | ) |
---|
662 | { |
---|
663 | ISR_lock_Context lock_context; |
---|
664 | |
---|
665 | _Watchdog_Set_CPU( the_watchdog, cpu ); |
---|
666 | |
---|
667 | _Watchdog_Per_CPU_acquire_critical( cpu, &lock_context ); |
---|
668 | _Watchdog_Insert( header, the_watchdog, expire ); |
---|
669 | _Watchdog_Per_CPU_release_critical( cpu, &lock_context ); |
---|
670 | return expire; |
---|
671 | } |
---|
672 | |
---|
673 | /** |
---|
674 | * @brief Removes the watchdog from the cpu and the scheduled watchdogs. |
---|
675 | * |
---|
676 | * @param[in, out] the_watchdog The watchdog to remove. |
---|
677 | * @param cpu The cpu to remove the watchdog from. |
---|
678 | * @param[in, out] The scheduled watchdogs. |
---|
679 | */ |
---|
680 | RTEMS_INLINE_ROUTINE void _Watchdog_Per_CPU_remove( |
---|
681 | Watchdog_Control *the_watchdog, |
---|
682 | Per_CPU_Control *cpu, |
---|
683 | Watchdog_Header *header |
---|
684 | ) |
---|
685 | { |
---|
686 | ISR_lock_Context lock_context; |
---|
687 | |
---|
688 | _Watchdog_Per_CPU_acquire_critical( cpu, &lock_context ); |
---|
689 | _Watchdog_Remove( |
---|
690 | header, |
---|
691 | the_watchdog |
---|
692 | ); |
---|
693 | _Watchdog_Per_CPU_release_critical( cpu, &lock_context ); |
---|
694 | } |
---|
695 | |
---|
696 | /** |
---|
697 | * @brief Removes the watchdog from the cpu and the scheduled watchdogs. |
---|
698 | * |
---|
699 | * @param[in, out] the_watchdog The watchdog to remove. |
---|
700 | */ |
---|
701 | RTEMS_INLINE_ROUTINE void _Watchdog_Per_CPU_remove_ticks( |
---|
702 | Watchdog_Control *the_watchdog |
---|
703 | ) |
---|
704 | { |
---|
705 | Per_CPU_Control *cpu; |
---|
706 | |
---|
707 | cpu = _Watchdog_Get_CPU( the_watchdog ); |
---|
708 | _Watchdog_Per_CPU_remove( |
---|
709 | the_watchdog, |
---|
710 | cpu, |
---|
711 | &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ] |
---|
712 | ); |
---|
713 | } |
---|
714 | |
---|
715 | /** @} */ |
---|
716 | |
---|
717 | #ifdef __cplusplus |
---|
718 | } |
---|
719 | #endif |
---|
720 | |
---|
721 | #endif |
---|
722 | /* end of include file */ |
---|