1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSScoreThread |
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5 | * |
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6 | * @brief This header file provides interfaces of the |
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7 | * @ref RTEMSScoreThread 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) 1989-2008. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * Copyright (c) 2014, 2017 embedded brains GmbH. |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.rtems.org/license/LICENSE. |
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19 | */ |
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20 | |
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21 | #ifndef _RTEMS_SCORE_THREADIMPL_H |
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22 | #define _RTEMS_SCORE_THREADIMPL_H |
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23 | |
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24 | #include <rtems/score/thread.h> |
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25 | #include <rtems/score/assert.h> |
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26 | #include <rtems/score/chainimpl.h> |
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27 | #include <rtems/score/interr.h> |
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28 | #include <rtems/score/isr.h> |
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29 | #include <rtems/score/objectimpl.h> |
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30 | #include <rtems/score/schedulernodeimpl.h> |
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31 | #include <rtems/score/statesimpl.h> |
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32 | #include <rtems/score/status.h> |
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33 | #include <rtems/score/sysstate.h> |
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34 | #include <rtems/score/timestampimpl.h> |
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35 | #include <rtems/score/threadqimpl.h> |
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36 | #include <rtems/score/todimpl.h> |
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37 | #include <rtems/score/watchdogimpl.h> |
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38 | #include <rtems/config.h> |
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39 | |
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40 | #ifdef __cplusplus |
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41 | extern "C" { |
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42 | #endif |
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43 | |
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44 | /** |
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45 | * @addtogroup RTEMSScoreThread |
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46 | * |
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47 | * @{ |
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48 | */ |
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49 | |
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50 | /** |
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51 | * Self for the GNU Ada Run-Time |
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52 | */ |
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53 | extern void *rtems_ada_self; |
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54 | |
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55 | /** |
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56 | * @brief Object identifier of the global constructor thread. |
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57 | * |
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58 | * This variable is set by _RTEMS_tasks_Initialize_user_tasks_body() or |
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59 | * _POSIX_Threads_Initialize_user_threads_body(). |
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60 | * |
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61 | * It is consumed by _Thread_Handler(). |
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62 | */ |
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63 | extern Objects_Id _Thread_Global_constructor; |
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64 | |
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65 | /** |
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66 | * The following points to the thread whose floating point |
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67 | * context is currently loaded. |
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68 | */ |
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69 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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70 | extern Thread_Control *_Thread_Allocated_fp; |
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71 | #endif |
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72 | |
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73 | #if defined(RTEMS_SMP) |
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74 | #define THREAD_OF_SCHEDULER_HELP_NODE( node ) \ |
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75 | RTEMS_CONTAINER_OF( node, Thread_Control, Scheduler.Help_node ) |
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76 | #endif |
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77 | |
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78 | typedef bool ( *Thread_Visitor )( Thread_Control *the_thread, void *arg ); |
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79 | |
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80 | /** |
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81 | * @brief Calls the visitor with all threads and the given argument until |
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82 | * it is done. |
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83 | * |
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84 | * @param visitor Function that gets a thread and @a arg as parameters and |
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85 | * returns if it is done. |
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86 | * @param arg Parameter for @a visitor |
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87 | */ |
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88 | void _Thread_Iterate( |
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89 | Thread_Visitor visitor, |
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90 | void *arg |
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91 | ); |
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92 | |
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93 | /** |
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94 | * @brief Initializes the thread information |
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95 | * |
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96 | * @param[out] information Information to initialize. |
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97 | */ |
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98 | void _Thread_Initialize_information( Thread_Information *information ); |
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99 | |
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100 | /** |
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101 | * @brief Initializes thread handler. |
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102 | * |
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103 | * This routine performs the initialization necessary for this handler. |
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104 | */ |
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105 | void _Thread_Handler_initialization(void); |
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106 | |
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107 | /** |
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108 | * @brief Creates idle thread. |
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109 | * |
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110 | * This routine creates the idle thread. |
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111 | * |
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112 | * @warning No thread should be created before this one. |
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113 | */ |
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114 | void _Thread_Create_idle(void); |
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115 | |
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116 | /** |
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117 | * @brief Starts thread multitasking. |
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118 | * |
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119 | * This routine initiates multitasking. It is invoked only as |
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120 | * part of initialization and its invocation is the last act of |
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121 | * the non-multitasking part of the system initialization. |
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122 | */ |
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123 | RTEMS_NO_RETURN void _Thread_Start_multitasking( void ); |
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124 | |
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125 | /** |
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126 | * @brief The configuration of a new thread to initialize. |
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127 | */ |
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128 | typedef struct { |
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129 | /** |
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130 | * @brief The scheduler control instance for the thread. |
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131 | */ |
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132 | const struct _Scheduler_Control *scheduler; |
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133 | |
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134 | /** |
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135 | * @brief The starting address of the stack area. |
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136 | */ |
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137 | void *stack_area; |
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138 | |
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139 | /** |
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140 | * @brief The size of the stack area in bytes. |
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141 | */ |
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142 | size_t stack_size; |
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143 | |
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144 | /** |
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145 | * @brief This member contains the handler to free the stack. |
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146 | * |
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147 | * It shall not be NULL. Use _Stack_Free_nothing() if nothing is to free. |
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148 | */ |
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149 | void ( *stack_free )( void * ); |
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150 | |
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151 | /** |
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152 | * @brief The new thread's priority. |
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153 | */ |
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154 | Priority_Control priority; |
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155 | |
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156 | /** |
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157 | * @brief The thread's budget algorithm. |
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158 | */ |
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159 | Thread_CPU_budget_algorithms budget_algorithm; |
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160 | |
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161 | /** |
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162 | * @brief The thread's initial budget callout. |
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163 | */ |
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164 | Thread_CPU_budget_algorithm_callout budget_callout; |
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165 | |
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166 | /** |
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167 | * @brief The thread's initial CPU time budget. |
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168 | */ |
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169 | uint32_t cpu_time_budget; |
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170 | |
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171 | /** |
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172 | * @brief 32-bit unsigned integer name of the object for the thread. |
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173 | */ |
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174 | uint32_t name; |
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175 | |
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176 | /** |
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177 | * @brief The thread's initial ISR level. |
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178 | */ |
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179 | uint32_t isr_level; |
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180 | |
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181 | /** |
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182 | * @brief Indicates whether the thread needs a floating-point area. |
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183 | */ |
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184 | bool is_fp; |
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185 | |
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186 | /** |
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187 | * @brief Indicates whether the new thread is preemptible. |
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188 | */ |
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189 | bool is_preemptible; |
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190 | } Thread_Configuration; |
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191 | |
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192 | /** |
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193 | * @brief Initializes thread. |
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194 | * |
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195 | * This routine initializes the specified the thread. It allocates |
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196 | * all memory associated with this thread. It completes by adding |
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197 | * the thread to the local object table so operations on this |
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198 | * thread id are allowed. |
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199 | * |
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200 | * @note If stack_area is NULL, it is allocated from the workspace. |
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201 | * |
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202 | * @note If the stack is allocated from the workspace, then it is |
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203 | * guaranteed to be of at least minimum size. |
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204 | * |
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205 | * @param information The thread information. |
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206 | * @param the_thread The thread to initialize. |
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207 | * @param config The configuration of the thread to initialize. |
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208 | * |
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209 | * @retval STATUS_SUCCESSFUL The thread initialization was successful. |
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210 | * |
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211 | * @retval STATUS_UNSATISFIED The thread initialization failed. |
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212 | */ |
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213 | Status_Control _Thread_Initialize( |
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214 | Thread_Information *information, |
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215 | Thread_Control *the_thread, |
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216 | const Thread_Configuration *config |
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217 | ); |
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218 | |
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219 | /** |
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220 | * @brief Frees the thread. |
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221 | * |
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222 | * This routine invokes the thread delete extensions and frees all resources |
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223 | * associated with the thread. Afterwards the thread object is closed. |
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224 | * |
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225 | * @param[in, out] information is the thread information. |
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226 | * |
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227 | * @param[in, out] the_thread is the thread to free. |
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228 | */ |
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229 | void _Thread_Free( |
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230 | Thread_Information *information, |
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231 | Thread_Control *the_thread |
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232 | ); |
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233 | |
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234 | /** |
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235 | * @brief Starts the specified thread. |
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236 | * |
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237 | * If the thread is not in the dormant state, the routine returns with a value |
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238 | * of false and performs no actions except enabling interrupts as indicated by |
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239 | * the ISR lock context. |
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240 | * |
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241 | * Otherwise, this routine initializes the executable information for the |
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242 | * thread and makes it ready to execute. After the call of this routine, the |
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243 | * thread competes with all other ready threads for CPU time. |
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244 | * |
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245 | * Then the routine enables the local interrupts as indicated by the ISR lock |
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246 | * context. |
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247 | * |
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248 | * Then the thread start user extensions are called with thread dispatching |
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249 | * disabled and interrupts enabled after making the thread ready. Please note |
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250 | * that in SMP configurations, the thread switch and begin user extensions may |
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251 | * be called in parallel on another processor. |
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252 | * |
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253 | * Then thread dispatching is enabled and other threads may execute before the |
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254 | * routine returns. |
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255 | * |
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256 | * @param[in, out] the_thread is the thread to start. |
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257 | * |
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258 | * @param entry is the thread entry information. |
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259 | * |
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260 | * @param[in, out] is the ISR lock context which shall be used to disable the |
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261 | * local interrupts before the call of this routine. |
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262 | * |
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263 | * @retval STATUS_SUCCESSFUL The thread start was successful. |
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264 | * |
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265 | * @retval STATUS_INCORRECT_STATE The thread was already started. |
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266 | */ |
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267 | Status_Control _Thread_Start( |
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268 | Thread_Control *the_thread, |
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269 | const Thread_Entry_information *entry, |
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270 | ISR_lock_Context *lock_context |
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271 | ); |
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272 | |
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273 | /** |
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274 | * @brief Restarts the currently executing thread. |
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275 | * |
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276 | * @param[in, out] executing The currently executing thread. |
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277 | * @param entry The start entry information for @a executing. |
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278 | * @param lock_context The lock context. |
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279 | */ |
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280 | RTEMS_NO_RETURN void _Thread_Restart_self( |
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281 | Thread_Control *executing, |
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282 | const Thread_Entry_information *entry, |
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283 | ISR_lock_Context *lock_context |
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284 | ); |
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285 | |
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286 | /** |
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287 | * @brief Restarts the thread. |
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288 | * |
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289 | * @param[in, out] the_thread The thread to restart. |
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290 | * @param entry The start entry information for @a the_thread. |
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291 | * @param lock_context The lock context. |
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292 | * |
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293 | * @retval true The operation was successful. |
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294 | * @retval false The operation failed. |
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295 | */ |
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296 | bool _Thread_Restart_other( |
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297 | Thread_Control *the_thread, |
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298 | const Thread_Entry_information *entry, |
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299 | ISR_lock_Context *lock_context |
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300 | ); |
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301 | |
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302 | /** |
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303 | * @brief Yields the currently executing thread. |
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304 | * |
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305 | * @param[in, out] executing The thread that performs a yield. |
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306 | */ |
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307 | void _Thread_Yield( Thread_Control *executing ); |
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308 | |
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309 | /** |
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310 | * @brief Changes the currently executing thread to a new state with the sets. |
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311 | * |
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312 | * @param clear States to clear. |
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313 | * @param set States to set. |
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314 | * @param ignore States to ignore. |
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315 | * |
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316 | * @return The previous state the thread was in. |
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317 | */ |
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318 | Thread_Life_state _Thread_Change_life( |
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319 | Thread_Life_state clear, |
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320 | Thread_Life_state set, |
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321 | Thread_Life_state ignore |
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322 | ); |
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323 | |
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324 | /** |
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325 | * @brief Set the thread to life protected. |
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326 | * |
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327 | * Calls _Thread_Change_life with the given state AND THREAD_LIFE_PROTECTED to |
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328 | * set and THREAD_LIFE_PROTECTED to clear. |
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329 | * |
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330 | * @param state The states to set. |
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331 | * |
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332 | * @return The previous state the thread was in. |
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333 | */ |
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334 | Thread_Life_state _Thread_Set_life_protection( Thread_Life_state state ); |
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335 | |
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336 | /** |
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337 | * @brief Kills all zombie threads in the system. |
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338 | * |
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339 | * Threads change into the zombie state as the last step in the thread |
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340 | * termination sequence right before a context switch to the heir thread is |
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341 | * initiated. Since the thread stack is still in use during this phase we have |
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342 | * to postpone the thread stack reclamation until this point. On SMP |
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343 | * configurations we may have to busy wait for context switch completion here. |
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344 | */ |
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345 | void _Thread_Kill_zombies( void ); |
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346 | |
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347 | /** |
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348 | * @brief Exits the currently executing thread. |
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349 | * |
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350 | * @param[in, out] executing The currently executing thread. |
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351 | * @param set The states to set. |
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352 | * @param[out] exit_value Contains the exit value of the thread. |
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353 | */ |
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354 | void _Thread_Exit( |
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355 | Thread_Control *executing, |
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356 | Thread_Life_state set, |
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357 | void *exit_value |
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358 | ); |
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359 | |
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360 | /** |
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361 | * @brief Joins the currently executing thread with the given thread to wait |
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362 | * for. |
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363 | * |
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364 | * @param[in, out] the_thread The thread to wait for. |
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365 | * @param waiting_for_join The states control for the join. |
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366 | * @param[in, out] executing The currently executing thread. |
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367 | * @param queue_context The thread queue context. |
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368 | */ |
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369 | void _Thread_Join( |
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370 | Thread_Control *the_thread, |
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371 | States_Control waiting_for_join, |
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372 | Thread_Control *executing, |
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373 | Thread_queue_Context *queue_context |
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374 | ); |
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375 | |
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376 | /** |
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377 | * @brief Cancels the thread. |
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378 | * |
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379 | * @param[in, out] the_thread The thread to cancel. |
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380 | * @param executing The currently executing thread. |
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381 | * @param exit_value The exit value for the thread. |
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382 | */ |
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383 | void _Thread_Cancel( |
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384 | Thread_Control *the_thread, |
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385 | Thread_Control *executing, |
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386 | void *exit_value |
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387 | ); |
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388 | |
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389 | typedef struct { |
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390 | Thread_queue_Context Base; |
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391 | Thread_Control *cancel; |
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392 | } Thread_Close_context; |
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393 | |
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394 | /** |
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395 | * @brief Closes the thread. |
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396 | * |
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397 | * Closes the thread object and starts the thread termination sequence. In |
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398 | * case the executing thread is not terminated, then this function waits until |
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399 | * the terminating thread reached the zombie state. |
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400 | * |
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401 | * @param the_thread The thread to close. |
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402 | * @param executing The currently executing thread. |
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403 | * @param[in, out] context The thread close context. |
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404 | */ |
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405 | void _Thread_Close( |
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406 | Thread_Control *the_thread, |
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407 | Thread_Control *executing, |
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408 | Thread_Close_context *context |
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409 | ); |
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410 | |
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411 | /** |
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412 | * @brief Checks if the thread is ready. |
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413 | * |
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414 | * @param the_thread The thread to check if it is ready. |
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415 | * |
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416 | * @retval true The thread is currently in the ready state. |
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417 | * @retval false The thread is currently not ready. |
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418 | */ |
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419 | RTEMS_INLINE_ROUTINE bool _Thread_Is_ready( const Thread_Control *the_thread ) |
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420 | { |
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421 | return _States_Is_ready( the_thread->current_state ); |
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422 | } |
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423 | |
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424 | /** |
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425 | * @brief Clears the specified thread state without locking the lock context. |
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426 | * |
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427 | * In the case the previous state is a non-ready state and the next state is |
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428 | * the ready state, then the thread is unblocked by the scheduler. |
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429 | * |
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430 | * @param[in, out] the_thread The thread. |
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431 | * @param state The state to clear. It must not be zero. |
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432 | * |
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433 | * @return The thread's previous state. |
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434 | */ |
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435 | States_Control _Thread_Clear_state_locked( |
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436 | Thread_Control *the_thread, |
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437 | States_Control state |
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438 | ); |
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439 | |
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440 | /** |
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441 | * @brief Clears the specified thread state. |
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442 | * |
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443 | * In the case the previous state is a non-ready state and the next state is |
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444 | * the ready state, then the thread is unblocked by the scheduler. |
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445 | * |
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446 | * @param[in, out] the_thread The thread. |
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447 | * @param state The state to clear. It must not be zero. |
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448 | * |
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449 | * @return The previous state. |
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450 | */ |
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451 | States_Control _Thread_Clear_state( |
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452 | Thread_Control *the_thread, |
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453 | States_Control state |
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454 | ); |
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455 | |
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456 | /** |
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457 | * @brief Sets the specified thread state without locking the lock context. |
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458 | * |
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459 | * In the case the previous state is the ready state, then the thread is blocked |
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460 | * by the scheduler. |
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461 | * |
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462 | * @param[in, out] the_thread The thread. |
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463 | * @param state The state to set. It must not be zero. |
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464 | * |
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465 | * @return The previous state. |
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466 | */ |
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467 | States_Control _Thread_Set_state_locked( |
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468 | Thread_Control *the_thread, |
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469 | States_Control state |
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470 | ); |
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471 | |
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472 | /** |
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473 | * @brief Sets the specified thread state. |
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474 | * |
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475 | * In the case the previous state is the ready state, then the thread is blocked |
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476 | * by the scheduler. |
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477 | * |
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478 | * @param[in, out] the_thread The thread. |
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479 | * @param state The state to set. It must not be zero. |
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480 | * |
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481 | * @return The previous state. |
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482 | */ |
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483 | States_Control _Thread_Set_state( |
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484 | Thread_Control *the_thread, |
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485 | States_Control state |
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486 | ); |
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487 | |
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488 | /** |
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489 | * @brief Initializes enviroment for a thread. |
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490 | * |
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491 | * This routine initializes the context of @a the_thread to its |
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492 | * appropriate starting state. |
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493 | * |
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494 | * @param[in, out] the_thread The pointer to the thread control block. |
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495 | */ |
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496 | void _Thread_Load_environment( |
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497 | Thread_Control *the_thread |
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498 | ); |
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499 | |
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500 | /** |
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501 | * @brief Calls the start kinds idle entry of the thread. |
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502 | * |
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503 | * @param executing The currently executing thread. |
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504 | */ |
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505 | void _Thread_Entry_adaptor_idle( Thread_Control *executing ); |
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506 | |
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507 | /** |
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508 | * @brief Calls the start kinds numeric entry of the thread. |
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509 | * |
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510 | * @param executing The currently executing thread. |
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511 | */ |
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512 | void _Thread_Entry_adaptor_numeric( Thread_Control *executing ); |
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513 | |
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514 | /** |
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515 | * @brief Calls the start kinds pointer entry of the thread. |
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516 | * |
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517 | * Stores the return value in the Wait.return_argument of the thread. |
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518 | * |
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519 | * @param executing The currently executing thread. |
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520 | */ |
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521 | void _Thread_Entry_adaptor_pointer( Thread_Control *executing ); |
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522 | |
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523 | /** |
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524 | * @brief Wrapper function for all threads. |
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525 | * |
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526 | * This routine is the wrapper function for all threads. It is |
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527 | * the starting point for all threads. The user provided thread |
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528 | * entry point is invoked by this routine. Operations |
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529 | * which must be performed immediately before and after the user's |
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530 | * thread executes are found here. |
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531 | * |
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532 | * @note On entry, it is assumed all interrupts are blocked and that this |
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533 | * routine needs to set the initial isr level. This may or may not |
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534 | * actually be needed by the context switch routine and as a result |
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535 | * interrupts may already be at there proper level. Either way, |
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536 | * setting the initial isr level properly here is safe. |
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537 | */ |
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538 | void _Thread_Handler( void ); |
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539 | |
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540 | /** |
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541 | * @brief Acquires the lock context in a critical section. |
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542 | * |
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543 | * @param the_thread The thread to acquire the lock context. |
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544 | * @param lock_context The lock context. |
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545 | */ |
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546 | RTEMS_INLINE_ROUTINE void _Thread_State_acquire_critical( |
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547 | Thread_Control *the_thread, |
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548 | ISR_lock_Context *lock_context |
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549 | ) |
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550 | { |
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551 | _Thread_queue_Do_acquire_critical( &the_thread->Join_queue, lock_context ); |
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552 | } |
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553 | |
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554 | /** |
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555 | * @brief Disables interrupts and acquires the lock_context. |
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556 | * |
---|
557 | * @param the_thread The thread to acquire the lock context. |
---|
558 | * @param lock_context The lock context. |
---|
559 | */ |
---|
560 | RTEMS_INLINE_ROUTINE void _Thread_State_acquire( |
---|
561 | Thread_Control *the_thread, |
---|
562 | ISR_lock_Context *lock_context |
---|
563 | ) |
---|
564 | { |
---|
565 | _ISR_lock_ISR_disable( lock_context ); |
---|
566 | _Thread_State_acquire_critical( the_thread, lock_context ); |
---|
567 | } |
---|
568 | |
---|
569 | /** |
---|
570 | * @brief Disables interrupts and acquires the lock context for the currently |
---|
571 | * executing thread. |
---|
572 | * |
---|
573 | * @param lock_context The lock context. |
---|
574 | * |
---|
575 | * @return The currently executing thread. |
---|
576 | */ |
---|
577 | RTEMS_INLINE_ROUTINE Thread_Control *_Thread_State_acquire_for_executing( |
---|
578 | ISR_lock_Context *lock_context |
---|
579 | ) |
---|
580 | { |
---|
581 | Thread_Control *executing; |
---|
582 | |
---|
583 | _ISR_lock_ISR_disable( lock_context ); |
---|
584 | executing = _Thread_Executing; |
---|
585 | _Thread_State_acquire_critical( executing, lock_context ); |
---|
586 | |
---|
587 | return executing; |
---|
588 | } |
---|
589 | |
---|
590 | /** |
---|
591 | * @brief Release the lock context in a critical section. |
---|
592 | * |
---|
593 | * @param the_thread The thread to release the lock context. |
---|
594 | * @param lock_context The lock context. |
---|
595 | */ |
---|
596 | RTEMS_INLINE_ROUTINE void _Thread_State_release_critical( |
---|
597 | Thread_Control *the_thread, |
---|
598 | ISR_lock_Context *lock_context |
---|
599 | ) |
---|
600 | { |
---|
601 | _Thread_queue_Do_release_critical( &the_thread->Join_queue, lock_context ); |
---|
602 | } |
---|
603 | |
---|
604 | /** |
---|
605 | * @brief Releases the lock context and enables interrupts. |
---|
606 | * |
---|
607 | * @param[in, out] the_thread The thread to release the lock context. |
---|
608 | * @param[out] lock_context The lock context. |
---|
609 | */ |
---|
610 | RTEMS_INLINE_ROUTINE void _Thread_State_release( |
---|
611 | Thread_Control *the_thread, |
---|
612 | ISR_lock_Context *lock_context |
---|
613 | ) |
---|
614 | { |
---|
615 | _Thread_State_release_critical( the_thread, lock_context ); |
---|
616 | _ISR_lock_ISR_enable( lock_context ); |
---|
617 | } |
---|
618 | |
---|
619 | /** |
---|
620 | * @brief Checks if the thread is owner of the lock of the join queue. |
---|
621 | * |
---|
622 | * @param the_thread The thread for the verification. |
---|
623 | * |
---|
624 | * @retval true The thread is owner of the lock of the join queue. |
---|
625 | * @retval false The thread is not owner of the lock of the join queue. |
---|
626 | */ |
---|
627 | #if defined(RTEMS_DEBUG) |
---|
628 | RTEMS_INLINE_ROUTINE bool _Thread_State_is_owner( |
---|
629 | const Thread_Control *the_thread |
---|
630 | ) |
---|
631 | { |
---|
632 | return _Thread_queue_Is_lock_owner( &the_thread->Join_queue ); |
---|
633 | } |
---|
634 | #endif |
---|
635 | |
---|
636 | /** |
---|
637 | * @brief Performs the priority actions specified by the thread queue context |
---|
638 | * along the thread queue path. |
---|
639 | * |
---|
640 | * The caller must be the owner of the thread wait lock. |
---|
641 | * |
---|
642 | * @param start_of_path The start thread of the thread queue path. |
---|
643 | * @param queue_context The thread queue context specifying the thread queue |
---|
644 | * path and initial thread priority actions. |
---|
645 | * |
---|
646 | * @see _Thread_queue_Path_acquire_critical(). |
---|
647 | */ |
---|
648 | void _Thread_Priority_perform_actions( |
---|
649 | Thread_Control *start_of_path, |
---|
650 | Thread_queue_Context *queue_context |
---|
651 | ); |
---|
652 | |
---|
653 | /** |
---|
654 | * @brief Adds the specified thread priority node to the corresponding thread |
---|
655 | * priority aggregation. |
---|
656 | * |
---|
657 | * The caller must be the owner of the thread wait lock. |
---|
658 | * |
---|
659 | * @param the_thread The thread. |
---|
660 | * @param priority_node The thread priority node to add. |
---|
661 | * @param queue_context The thread queue context to return an updated set of |
---|
662 | * threads for _Thread_Priority_update(). The thread queue context must be |
---|
663 | * initialized via _Thread_queue_Context_clear_priority_updates() before a |
---|
664 | * call of this function. |
---|
665 | * |
---|
666 | * @see _Thread_Wait_acquire(). |
---|
667 | */ |
---|
668 | void _Thread_Priority_add( |
---|
669 | Thread_Control *the_thread, |
---|
670 | Priority_Node *priority_node, |
---|
671 | Thread_queue_Context *queue_context |
---|
672 | ); |
---|
673 | |
---|
674 | /** |
---|
675 | * @brief Removes the specified thread priority node from the corresponding |
---|
676 | * thread priority aggregation. |
---|
677 | * |
---|
678 | * The caller must be the owner of the thread wait lock. |
---|
679 | * |
---|
680 | * @param the_thread The thread. |
---|
681 | * @param priority_node The thread priority node to remove. |
---|
682 | * @param queue_context The thread queue context to return an updated set of |
---|
683 | * threads for _Thread_Priority_update(). The thread queue context must be |
---|
684 | * initialized via _Thread_queue_Context_clear_priority_updates() before a |
---|
685 | * call of this function. |
---|
686 | * |
---|
687 | * @see _Thread_Wait_acquire(). |
---|
688 | */ |
---|
689 | void _Thread_Priority_remove( |
---|
690 | Thread_Control *the_thread, |
---|
691 | Priority_Node *priority_node, |
---|
692 | Thread_queue_Context *queue_context |
---|
693 | ); |
---|
694 | |
---|
695 | /** |
---|
696 | * @brief Propagates a thread priority value change in the specified thread |
---|
697 | * priority node to the corresponding thread priority aggregation. |
---|
698 | * |
---|
699 | * The caller must be the owner of the thread wait lock. |
---|
700 | * |
---|
701 | * @param the_thread The thread. |
---|
702 | * @param[out] priority_node The thread priority node to change. |
---|
703 | * @param prepend_it In case this is true, then the thread is prepended to |
---|
704 | * its priority group in its home scheduler instance, otherwise it is |
---|
705 | * appended. |
---|
706 | * @param queue_context The thread queue context to return an updated set of |
---|
707 | * threads for _Thread_Priority_update(). The thread queue context must be |
---|
708 | * initialized via _Thread_queue_Context_clear_priority_updates() before a |
---|
709 | * call of this function. |
---|
710 | * |
---|
711 | * @see _Thread_Wait_acquire(). |
---|
712 | */ |
---|
713 | void _Thread_Priority_changed( |
---|
714 | Thread_Control *the_thread, |
---|
715 | Priority_Node *priority_node, |
---|
716 | bool prepend_it, |
---|
717 | Thread_queue_Context *queue_context |
---|
718 | ); |
---|
719 | |
---|
720 | /** |
---|
721 | * @brief Changes the thread priority value of the specified thread priority |
---|
722 | * node in the corresponding thread priority aggregation. |
---|
723 | * |
---|
724 | * The caller must be the owner of the thread wait lock. |
---|
725 | * |
---|
726 | * @param the_thread The thread. |
---|
727 | * @param[out] priority_node The thread priority node to change. |
---|
728 | * @param new_priority The new thread priority value of the thread priority |
---|
729 | * node to change. |
---|
730 | * @param prepend_it In case this is true, then the thread is prepended to |
---|
731 | * its priority group in its home scheduler instance, otherwise it is |
---|
732 | * appended. |
---|
733 | * @param queue_context The thread queue context to return an updated set of |
---|
734 | * threads for _Thread_Priority_update(). The thread queue context must be |
---|
735 | * initialized via _Thread_queue_Context_clear_priority_updates() before a |
---|
736 | * call of this function. |
---|
737 | * |
---|
738 | * @see _Thread_Wait_acquire(). |
---|
739 | */ |
---|
740 | RTEMS_INLINE_ROUTINE void _Thread_Priority_change( |
---|
741 | Thread_Control *the_thread, |
---|
742 | Priority_Node *priority_node, |
---|
743 | Priority_Control new_priority, |
---|
744 | bool prepend_it, |
---|
745 | Thread_queue_Context *queue_context |
---|
746 | ) |
---|
747 | { |
---|
748 | _Priority_Node_set_priority( priority_node, new_priority ); |
---|
749 | _Thread_Priority_changed( |
---|
750 | the_thread, |
---|
751 | priority_node, |
---|
752 | prepend_it, |
---|
753 | queue_context |
---|
754 | ); |
---|
755 | } |
---|
756 | |
---|
757 | /** |
---|
758 | * @brief Replaces the victim priority node with the replacement priority node |
---|
759 | * in the corresponding thread priority aggregation. |
---|
760 | * |
---|
761 | * The caller must be the owner of the thread wait lock. |
---|
762 | * |
---|
763 | * @param the_thread The thread. |
---|
764 | * @param victim_node The victim thread priority node. |
---|
765 | * @param replacement_node The replacement thread priority node. |
---|
766 | * |
---|
767 | * @see _Thread_Wait_acquire(). |
---|
768 | */ |
---|
769 | void _Thread_Priority_replace( |
---|
770 | Thread_Control *the_thread, |
---|
771 | Priority_Node *victim_node, |
---|
772 | Priority_Node *replacement_node |
---|
773 | ); |
---|
774 | |
---|
775 | /** |
---|
776 | * @brief Updates the priority of all threads in the set |
---|
777 | * |
---|
778 | * @param queue_context The thread queue context to return an updated set of |
---|
779 | * threads for _Thread_Priority_update(). The thread queue context must be |
---|
780 | * initialized via _Thread_queue_Context_clear_priority_updates() before a |
---|
781 | * call of this function. |
---|
782 | * |
---|
783 | * @see _Thread_Priority_add(), _Thread_Priority_change(), |
---|
784 | * _Thread_Priority_changed() and _Thread_Priority_remove(). |
---|
785 | */ |
---|
786 | void _Thread_Priority_update( Thread_queue_Context *queue_context ); |
---|
787 | |
---|
788 | /** |
---|
789 | * @brief Updates the priority of the thread and changes it sticky level. |
---|
790 | * |
---|
791 | * @param the_thread The thread. |
---|
792 | * @param sticky_level_change The new value for the sticky level. |
---|
793 | */ |
---|
794 | #if defined(RTEMS_SMP) |
---|
795 | void _Thread_Priority_and_sticky_update( |
---|
796 | Thread_Control *the_thread, |
---|
797 | int sticky_level_change |
---|
798 | ); |
---|
799 | #endif |
---|
800 | |
---|
801 | /** |
---|
802 | * @brief Checks if the left thread priority is less than the right thread |
---|
803 | * priority in the intuitive sense of priority. |
---|
804 | * |
---|
805 | * @param left The left thread priority. |
---|
806 | * @param right The right thread priority. |
---|
807 | * |
---|
808 | * @retval true The left priority is less in the intuitive sense. |
---|
809 | * @retval false The left priority is greater or equal in the intuitive sense. |
---|
810 | */ |
---|
811 | RTEMS_INLINE_ROUTINE bool _Thread_Priority_less_than( |
---|
812 | Priority_Control left, |
---|
813 | Priority_Control right |
---|
814 | ) |
---|
815 | { |
---|
816 | return left > right; |
---|
817 | } |
---|
818 | |
---|
819 | /** |
---|
820 | * @brief Returns the highest priority of the left and right thread priorities |
---|
821 | * in the intuitive sense of priority. |
---|
822 | * |
---|
823 | * @param left The left thread priority. |
---|
824 | * @param right The right thread priority. |
---|
825 | * |
---|
826 | * @return The highest priority in the intuitive sense of priority. |
---|
827 | */ |
---|
828 | RTEMS_INLINE_ROUTINE Priority_Control _Thread_Priority_highest( |
---|
829 | Priority_Control left, |
---|
830 | Priority_Control right |
---|
831 | ) |
---|
832 | { |
---|
833 | return _Thread_Priority_less_than( left, right ) ? right : left; |
---|
834 | } |
---|
835 | |
---|
836 | /** |
---|
837 | * @brief Gets the thread object information for the API of the object |
---|
838 | * identifier. |
---|
839 | * |
---|
840 | * @param id is an object identifier which defines the API to get the |
---|
841 | * associated thread objects information. |
---|
842 | * |
---|
843 | * @retval NULL The object identifier had an invalid API. |
---|
844 | * |
---|
845 | * @return Returns the thread object information associated with the API of the |
---|
846 | * object identifier. |
---|
847 | */ |
---|
848 | RTEMS_INLINE_ROUTINE Objects_Information *_Thread_Get_objects_information_by_id( |
---|
849 | Objects_Id id |
---|
850 | ) |
---|
851 | { |
---|
852 | uint32_t the_api; |
---|
853 | |
---|
854 | the_api = _Objects_Get_API( id ); |
---|
855 | |
---|
856 | if ( !_Objects_Is_api_valid( the_api ) ) { |
---|
857 | return NULL; |
---|
858 | } |
---|
859 | |
---|
860 | /* |
---|
861 | * Threads are always first class :) |
---|
862 | * |
---|
863 | * There is no need to validate the object class of the object identifier, |
---|
864 | * since this will be done by the object get methods. |
---|
865 | */ |
---|
866 | return _Objects_Information_table[ the_api ][ 1 ]; |
---|
867 | } |
---|
868 | |
---|
869 | /** |
---|
870 | * @brief Gets the thread object information of the thread. |
---|
871 | * |
---|
872 | * @param the_thread is the thread to get the thread object information. |
---|
873 | * |
---|
874 | * @return Returns the thread object information of the thread. |
---|
875 | */ |
---|
876 | RTEMS_INLINE_ROUTINE Thread_Information *_Thread_Get_objects_information( |
---|
877 | Thread_Control *the_thread |
---|
878 | ) |
---|
879 | { |
---|
880 | size_t the_api; |
---|
881 | Thread_Information *information; |
---|
882 | |
---|
883 | the_api = (size_t) _Objects_Get_API( the_thread->Object.id ); |
---|
884 | _Assert( _Objects_Is_api_valid( the_api ) ); |
---|
885 | |
---|
886 | information = (Thread_Information *) |
---|
887 | _Objects_Information_table[ the_api ][ 1 ]; |
---|
888 | _Assert( information != NULL ); |
---|
889 | |
---|
890 | return information; |
---|
891 | } |
---|
892 | |
---|
893 | /** |
---|
894 | * @brief Gets a thread by its identifier. |
---|
895 | * |
---|
896 | * @see _Objects_Get(). |
---|
897 | * |
---|
898 | * @param id The id of the thread. |
---|
899 | * @param lock_context The lock context. |
---|
900 | */ |
---|
901 | Thread_Control *_Thread_Get( |
---|
902 | Objects_Id id, |
---|
903 | ISR_lock_Context *lock_context |
---|
904 | ); |
---|
905 | |
---|
906 | /** |
---|
907 | * @brief Gets the identifier of the calling thread. |
---|
908 | * |
---|
909 | * @return Returns the identifier of the calling thread. |
---|
910 | */ |
---|
911 | Objects_Id _Thread_Self_id( void ); |
---|
912 | |
---|
913 | /** |
---|
914 | * @brief Gets the cpu of the thread's scheduler. |
---|
915 | * |
---|
916 | * @param thread The thread. |
---|
917 | * |
---|
918 | * @return The cpu of the thread's scheduler. |
---|
919 | */ |
---|
920 | RTEMS_INLINE_ROUTINE Per_CPU_Control *_Thread_Get_CPU( |
---|
921 | const Thread_Control *thread |
---|
922 | ) |
---|
923 | { |
---|
924 | #if defined(RTEMS_SMP) |
---|
925 | return thread->Scheduler.cpu; |
---|
926 | #else |
---|
927 | (void) thread; |
---|
928 | |
---|
929 | return _Per_CPU_Get(); |
---|
930 | #endif |
---|
931 | } |
---|
932 | |
---|
933 | /** |
---|
934 | * @brief Sets the cpu of the thread's scheduler. |
---|
935 | * |
---|
936 | * @param[out] thread The thread. |
---|
937 | * @param cpu The cpu to set. |
---|
938 | */ |
---|
939 | RTEMS_INLINE_ROUTINE void _Thread_Set_CPU( |
---|
940 | Thread_Control *thread, |
---|
941 | Per_CPU_Control *cpu |
---|
942 | ) |
---|
943 | { |
---|
944 | #if defined(RTEMS_SMP) |
---|
945 | thread->Scheduler.cpu = cpu; |
---|
946 | #else |
---|
947 | (void) thread; |
---|
948 | (void) cpu; |
---|
949 | #endif |
---|
950 | } |
---|
951 | |
---|
952 | /** |
---|
953 | * @brief Checks if the thread is the currently executing thread. |
---|
954 | * |
---|
955 | * This function returns true if the_thread is the currently executing |
---|
956 | * thread, and false otherwise. |
---|
957 | * |
---|
958 | * @param the_thread The thread to verify if it is the currently executing thread. |
---|
959 | * |
---|
960 | * @retval true @a the_thread is the currently executing one. |
---|
961 | * @retval false @a the_thread is not the currently executing one. |
---|
962 | */ |
---|
963 | RTEMS_INLINE_ROUTINE bool _Thread_Is_executing ( |
---|
964 | const Thread_Control *the_thread |
---|
965 | ) |
---|
966 | { |
---|
967 | return ( the_thread == _Thread_Executing ); |
---|
968 | } |
---|
969 | |
---|
970 | #if defined(RTEMS_SMP) |
---|
971 | /** |
---|
972 | * @brief Checks if the thread executes currently on some processor in the |
---|
973 | * system. |
---|
974 | * |
---|
975 | * Do not confuse this with _Thread_Is_executing() which checks only the |
---|
976 | * current processor. |
---|
977 | * |
---|
978 | * @param the_thread The thread for the verification. |
---|
979 | * |
---|
980 | * @retval true @a the_thread is the currently executing one. |
---|
981 | * @retval false @a the_thread is not the currently executing one. |
---|
982 | */ |
---|
983 | RTEMS_INLINE_ROUTINE bool _Thread_Is_executing_on_a_processor( |
---|
984 | const Thread_Control *the_thread |
---|
985 | ) |
---|
986 | { |
---|
987 | return _CPU_Context_Get_is_executing( &the_thread->Registers ); |
---|
988 | } |
---|
989 | #endif |
---|
990 | |
---|
991 | /** |
---|
992 | * @brief Checks if the thread is the heir. |
---|
993 | * |
---|
994 | * This function returns true if the_thread is the heir |
---|
995 | * thread, and false otherwise. |
---|
996 | * |
---|
997 | * @param the_thread The thread for the verification. |
---|
998 | * |
---|
999 | * @retval true @a the_thread is the heir. |
---|
1000 | * @retval false @a the_thread is not the heir. |
---|
1001 | */ |
---|
1002 | RTEMS_INLINE_ROUTINE bool _Thread_Is_heir ( |
---|
1003 | const Thread_Control *the_thread |
---|
1004 | ) |
---|
1005 | { |
---|
1006 | return ( the_thread == _Thread_Heir ); |
---|
1007 | } |
---|
1008 | |
---|
1009 | /** |
---|
1010 | * @brief Unblocks the thread. |
---|
1011 | * |
---|
1012 | * This routine clears any blocking state for the_thread. It performs |
---|
1013 | * any necessary scheduling operations including the selection of |
---|
1014 | * a new heir thread. |
---|
1015 | * |
---|
1016 | * @param[in, out] the_thread The thread to unblock. |
---|
1017 | */ |
---|
1018 | RTEMS_INLINE_ROUTINE void _Thread_Unblock ( |
---|
1019 | Thread_Control *the_thread |
---|
1020 | ) |
---|
1021 | { |
---|
1022 | _Thread_Clear_state( the_thread, STATES_BLOCKED ); |
---|
1023 | } |
---|
1024 | |
---|
1025 | /** |
---|
1026 | * @brief Checks if the floating point context of the thread is currently |
---|
1027 | * loaded in the floating point unit. |
---|
1028 | * |
---|
1029 | * This function returns true if the floating point context of |
---|
1030 | * the_thread is currently loaded in the floating point unit, and |
---|
1031 | * false otherwise. |
---|
1032 | * |
---|
1033 | * @param the_thread The thread for the verification. |
---|
1034 | * |
---|
1035 | * @retval true The floating point context of @a the_thread is currently |
---|
1036 | * loaded in the floating point unit. |
---|
1037 | * @retval false The floating point context of @a the_thread is currently not |
---|
1038 | * loaded in the floating point unit. |
---|
1039 | */ |
---|
1040 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
---|
1041 | RTEMS_INLINE_ROUTINE bool _Thread_Is_allocated_fp ( |
---|
1042 | const Thread_Control *the_thread |
---|
1043 | ) |
---|
1044 | { |
---|
1045 | return ( the_thread == _Thread_Allocated_fp ); |
---|
1046 | } |
---|
1047 | #endif |
---|
1048 | |
---|
1049 | /* |
---|
1050 | * If the CPU has hardware floating point, then we must address saving |
---|
1051 | * and restoring it as part of the context switch. |
---|
1052 | * |
---|
1053 | * The second conditional compilation section selects the algorithm used |
---|
1054 | * to context switch between floating point tasks. The deferred algorithm |
---|
1055 | * can be significantly better in a system with few floating point tasks |
---|
1056 | * because it reduces the total number of save and restore FP context |
---|
1057 | * operations. However, this algorithm can not be used on all CPUs due |
---|
1058 | * to unpredictable use of FP registers by some compilers for integer |
---|
1059 | * operations. |
---|
1060 | */ |
---|
1061 | |
---|
1062 | /** |
---|
1063 | * @brief Saves the executing thread's floating point area. |
---|
1064 | * |
---|
1065 | * @param executing The currently executing thread. |
---|
1066 | */ |
---|
1067 | RTEMS_INLINE_ROUTINE void _Thread_Save_fp( Thread_Control *executing ) |
---|
1068 | { |
---|
1069 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
---|
1070 | #if ( CPU_USE_DEFERRED_FP_SWITCH != TRUE ) |
---|
1071 | if ( executing->fp_context != NULL ) |
---|
1072 | _Context_Save_fp( &executing->fp_context ); |
---|
1073 | #endif |
---|
1074 | #endif |
---|
1075 | } |
---|
1076 | |
---|
1077 | /** |
---|
1078 | * @brief Restores the executing thread's floating point area. |
---|
1079 | * |
---|
1080 | * @param executing The currently executing thread. |
---|
1081 | */ |
---|
1082 | RTEMS_INLINE_ROUTINE void _Thread_Restore_fp( Thread_Control *executing ) |
---|
1083 | { |
---|
1084 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
---|
1085 | #if ( CPU_USE_DEFERRED_FP_SWITCH == TRUE ) |
---|
1086 | if ( (executing->fp_context != NULL) && |
---|
1087 | !_Thread_Is_allocated_fp( executing ) ) { |
---|
1088 | if ( _Thread_Allocated_fp != NULL ) |
---|
1089 | _Context_Save_fp( &_Thread_Allocated_fp->fp_context ); |
---|
1090 | _Context_Restore_fp( &executing->fp_context ); |
---|
1091 | _Thread_Allocated_fp = executing; |
---|
1092 | } |
---|
1093 | #else |
---|
1094 | if ( executing->fp_context != NULL ) |
---|
1095 | _Context_Restore_fp( &executing->fp_context ); |
---|
1096 | #endif |
---|
1097 | #endif |
---|
1098 | } |
---|
1099 | |
---|
1100 | /** |
---|
1101 | * @brief Deallocates the currently loaded floating point context. |
---|
1102 | * |
---|
1103 | * This routine is invoked when the currently loaded floating |
---|
1104 | * point context is now longer associated with an active thread. |
---|
1105 | */ |
---|
1106 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
---|
1107 | RTEMS_INLINE_ROUTINE void _Thread_Deallocate_fp( void ) |
---|
1108 | { |
---|
1109 | _Thread_Allocated_fp = NULL; |
---|
1110 | } |
---|
1111 | #endif |
---|
1112 | |
---|
1113 | /** |
---|
1114 | * @brief Checks if dispatching is disabled. |
---|
1115 | * |
---|
1116 | * This function returns true if dispatching is disabled, and false |
---|
1117 | * otherwise. |
---|
1118 | * |
---|
1119 | * @retval true Dispatching is disabled. |
---|
1120 | * @retval false Dispatching is enabled. |
---|
1121 | */ |
---|
1122 | RTEMS_INLINE_ROUTINE bool _Thread_Is_context_switch_necessary( void ) |
---|
1123 | { |
---|
1124 | return ( _Thread_Dispatch_necessary ); |
---|
1125 | } |
---|
1126 | |
---|
1127 | /** |
---|
1128 | * @brief Gets the maximum number of internal threads. |
---|
1129 | * |
---|
1130 | * @return The maximum number of internal threads. |
---|
1131 | */ |
---|
1132 | RTEMS_INLINE_ROUTINE uint32_t _Thread_Get_maximum_internal_threads(void) |
---|
1133 | { |
---|
1134 | /* Idle threads */ |
---|
1135 | uint32_t maximum_internal_threads = |
---|
1136 | rtems_configuration_get_maximum_processors(); |
---|
1137 | |
---|
1138 | /* MPCI thread */ |
---|
1139 | #if defined(RTEMS_MULTIPROCESSING) |
---|
1140 | if ( _System_state_Is_multiprocessing ) { |
---|
1141 | ++maximum_internal_threads; |
---|
1142 | } |
---|
1143 | #endif |
---|
1144 | |
---|
1145 | return maximum_internal_threads; |
---|
1146 | } |
---|
1147 | |
---|
1148 | /** |
---|
1149 | * @brief Allocates an internal thread and returns it. |
---|
1150 | * |
---|
1151 | * @retval pointer Pointer to the allocated Thread_Control. |
---|
1152 | * @retval NULL The operation failed. |
---|
1153 | */ |
---|
1154 | RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Internal_allocate( void ) |
---|
1155 | { |
---|
1156 | return (Thread_Control *) |
---|
1157 | _Objects_Allocate_unprotected( &_Thread_Information.Objects ); |
---|
1158 | } |
---|
1159 | |
---|
1160 | /** |
---|
1161 | * @brief Gets the heir of the processor and makes it executing. |
---|
1162 | * |
---|
1163 | * Must be called with interrupts disabled. The thread dispatch necessary |
---|
1164 | * indicator is cleared as a side-effect. |
---|
1165 | * |
---|
1166 | * @param[in, out] cpu_self The processor to get the heir of. |
---|
1167 | * |
---|
1168 | * @return The heir thread. |
---|
1169 | * |
---|
1170 | * @see _Thread_Dispatch(), _Thread_Start_multitasking() and |
---|
1171 | * _Thread_Dispatch_update_heir(). |
---|
1172 | */ |
---|
1173 | RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Get_heir_and_make_it_executing( |
---|
1174 | Per_CPU_Control *cpu_self |
---|
1175 | ) |
---|
1176 | { |
---|
1177 | Thread_Control *heir; |
---|
1178 | |
---|
1179 | heir = cpu_self->heir; |
---|
1180 | cpu_self->dispatch_necessary = false; |
---|
1181 | cpu_self->executing = heir; |
---|
1182 | |
---|
1183 | return heir; |
---|
1184 | } |
---|
1185 | |
---|
1186 | /** |
---|
1187 | * @brief Updates the cpu time used of the thread. |
---|
1188 | * |
---|
1189 | * @param[in, out] the_thread The thread to add additional cpu time that is |
---|
1190 | * used. |
---|
1191 | * @param cpu The cpu. |
---|
1192 | */ |
---|
1193 | RTEMS_INLINE_ROUTINE void _Thread_Update_CPU_time_used( |
---|
1194 | Thread_Control *the_thread, |
---|
1195 | Per_CPU_Control *cpu |
---|
1196 | ) |
---|
1197 | { |
---|
1198 | Timestamp_Control last; |
---|
1199 | Timestamp_Control ran; |
---|
1200 | |
---|
1201 | last = cpu->cpu_usage_timestamp; |
---|
1202 | _TOD_Get_uptime( &cpu->cpu_usage_timestamp ); |
---|
1203 | _Timestamp_Subtract( &last, &cpu->cpu_usage_timestamp, &ran ); |
---|
1204 | _Timestamp_Add_to( &the_thread->cpu_time_used, &ran ); |
---|
1205 | } |
---|
1206 | |
---|
1207 | /** |
---|
1208 | * @brief Updates the used cpu time for the heir and dispatches a new heir. |
---|
1209 | * |
---|
1210 | * @param[in, out] cpu_self The current processor. |
---|
1211 | * @param[in, out] cpu_for_heir The processor to do a dispatch on. |
---|
1212 | * @param heir The new heir for @a cpu_for_heir. |
---|
1213 | */ |
---|
1214 | #if defined( RTEMS_SMP ) |
---|
1215 | RTEMS_INLINE_ROUTINE void _Thread_Dispatch_update_heir( |
---|
1216 | Per_CPU_Control *cpu_self, |
---|
1217 | Per_CPU_Control *cpu_for_heir, |
---|
1218 | Thread_Control *heir |
---|
1219 | ) |
---|
1220 | { |
---|
1221 | _Thread_Update_CPU_time_used( cpu_for_heir->heir, cpu_for_heir ); |
---|
1222 | |
---|
1223 | cpu_for_heir->heir = heir; |
---|
1224 | |
---|
1225 | _Thread_Dispatch_request( cpu_self, cpu_for_heir ); |
---|
1226 | } |
---|
1227 | #endif |
---|
1228 | |
---|
1229 | /** |
---|
1230 | * @brief Gets the used cpu time of the thread and stores it in the given |
---|
1231 | * Timestamp_Control. |
---|
1232 | * |
---|
1233 | * @param the_thread The thread to get the used cpu time of. |
---|
1234 | * @param[out] cpu_time_used Stores the used cpu time of @a the_thread. |
---|
1235 | */ |
---|
1236 | void _Thread_Get_CPU_time_used( |
---|
1237 | Thread_Control *the_thread, |
---|
1238 | Timestamp_Control *cpu_time_used |
---|
1239 | ); |
---|
1240 | |
---|
1241 | /** |
---|
1242 | * @brief Initializes the control chain of the action control. |
---|
1243 | * |
---|
1244 | * @param[out] action_control The action control to initialize. |
---|
1245 | */ |
---|
1246 | RTEMS_INLINE_ROUTINE void _Thread_Action_control_initialize( |
---|
1247 | Thread_Action_control *action_control |
---|
1248 | ) |
---|
1249 | { |
---|
1250 | _Chain_Initialize_empty( &action_control->Chain ); |
---|
1251 | } |
---|
1252 | |
---|
1253 | /** |
---|
1254 | * @brief Initializes the Thread action. |
---|
1255 | * |
---|
1256 | * @param[out] action The Thread_Action to initialize. |
---|
1257 | */ |
---|
1258 | RTEMS_INLINE_ROUTINE void _Thread_Action_initialize( |
---|
1259 | Thread_Action *action |
---|
1260 | ) |
---|
1261 | { |
---|
1262 | _Chain_Set_off_chain( &action->Node ); |
---|
1263 | } |
---|
1264 | |
---|
1265 | /** |
---|
1266 | * @brief Adds the post switch action to the thread. |
---|
1267 | * |
---|
1268 | * The caller shall own the thread state lock. A thread dispatch is |
---|
1269 | * requested. |
---|
1270 | * |
---|
1271 | * @param[in, out] the_thread is the thread of the action. |
---|
1272 | * |
---|
1273 | * @param[in, out] action is the action to add. |
---|
1274 | * |
---|
1275 | * @param handler is the handler for the action. |
---|
1276 | */ |
---|
1277 | RTEMS_INLINE_ROUTINE void _Thread_Add_post_switch_action( |
---|
1278 | Thread_Control *the_thread, |
---|
1279 | Thread_Action *action, |
---|
1280 | Thread_Action_handler handler |
---|
1281 | ) |
---|
1282 | { |
---|
1283 | Per_CPU_Control *cpu_of_thread; |
---|
1284 | |
---|
1285 | _Assert( _Thread_State_is_owner( the_thread ) ); |
---|
1286 | |
---|
1287 | cpu_of_thread = _Thread_Get_CPU( the_thread ); |
---|
1288 | |
---|
1289 | action->handler = handler; |
---|
1290 | |
---|
1291 | _Thread_Dispatch_request( _Per_CPU_Get(), cpu_of_thread ); |
---|
1292 | |
---|
1293 | _Chain_Append_if_is_off_chain_unprotected( |
---|
1294 | &the_thread->Post_switch_actions.Chain, |
---|
1295 | &action->Node |
---|
1296 | ); |
---|
1297 | } |
---|
1298 | |
---|
1299 | /** |
---|
1300 | * @brief Appends the post switch action to the thread. |
---|
1301 | * |
---|
1302 | * The caller shall own the thread state lock. The action shall be inactive. |
---|
1303 | * The handler of the action shall be already set. A thread dispatch is not |
---|
1304 | * requested. |
---|
1305 | * |
---|
1306 | * @param[in, out] the_thread is the thread of the action. |
---|
1307 | * |
---|
1308 | * @param[in, out] action is the action to add. |
---|
1309 | */ |
---|
1310 | RTEMS_INLINE_ROUTINE void _Thread_Append_post_switch_action( |
---|
1311 | Thread_Control *the_thread, |
---|
1312 | Thread_Action *action |
---|
1313 | ) |
---|
1314 | { |
---|
1315 | _Assert( _Thread_State_is_owner( the_thread ) ); |
---|
1316 | _Assert( action->handler != NULL ); |
---|
1317 | |
---|
1318 | _Chain_Append_unprotected( |
---|
1319 | &the_thread->Post_switch_actions.Chain, |
---|
1320 | &action->Node |
---|
1321 | ); |
---|
1322 | } |
---|
1323 | |
---|
1324 | /** |
---|
1325 | * @brief Checks if the thread life state is restarting. |
---|
1326 | * |
---|
1327 | * @param life_state The thread life state for the verification. |
---|
1328 | * |
---|
1329 | * @retval true @a life_state is restarting. |
---|
1330 | * @retval false @a life_state is not restarting. |
---|
1331 | */ |
---|
1332 | RTEMS_INLINE_ROUTINE bool _Thread_Is_life_restarting( |
---|
1333 | Thread_Life_state life_state |
---|
1334 | ) |
---|
1335 | { |
---|
1336 | return ( life_state & THREAD_LIFE_RESTARTING ) != 0; |
---|
1337 | } |
---|
1338 | |
---|
1339 | /** |
---|
1340 | * @brief Checks if the thread life state is terminating. |
---|
1341 | * |
---|
1342 | * @param life_state The thread life state for the verification. |
---|
1343 | * |
---|
1344 | * @retval true @a life_state is terminating. |
---|
1345 | * @retval false @a life_state is not terminating. |
---|
1346 | */ |
---|
1347 | RTEMS_INLINE_ROUTINE bool _Thread_Is_life_terminating( |
---|
1348 | Thread_Life_state life_state |
---|
1349 | ) |
---|
1350 | { |
---|
1351 | return ( life_state & THREAD_LIFE_TERMINATING ) != 0; |
---|
1352 | } |
---|
1353 | |
---|
1354 | /** |
---|
1355 | * @brief Checks if the thread life state allos life change. |
---|
1356 | * |
---|
1357 | * @param life_state The thread life state for the verification. |
---|
1358 | * |
---|
1359 | * @retval true @a life_state allows life change. |
---|
1360 | * @retval false @a life_state does not allow life change. |
---|
1361 | */ |
---|
1362 | RTEMS_INLINE_ROUTINE bool _Thread_Is_life_change_allowed( |
---|
1363 | Thread_Life_state life_state |
---|
1364 | ) |
---|
1365 | { |
---|
1366 | return ( life_state |
---|
1367 | & ( THREAD_LIFE_PROTECTED | THREAD_LIFE_CHANGE_DEFERRED ) ) == 0; |
---|
1368 | } |
---|
1369 | |
---|
1370 | /** |
---|
1371 | * @brief Checks if the thread life state is life changing. |
---|
1372 | * |
---|
1373 | * @param life_state The thread life state for the verification. |
---|
1374 | * |
---|
1375 | * @retval true @a life_state is life changing. |
---|
1376 | * @retval false @a life_state is not life changing. |
---|
1377 | */ |
---|
1378 | RTEMS_INLINE_ROUTINE bool _Thread_Is_life_changing( |
---|
1379 | Thread_Life_state life_state |
---|
1380 | ) |
---|
1381 | { |
---|
1382 | return ( life_state |
---|
1383 | & ( THREAD_LIFE_RESTARTING | THREAD_LIFE_TERMINATING ) ) != 0; |
---|
1384 | } |
---|
1385 | |
---|
1386 | /** |
---|
1387 | * @brief Checks if the thread is joinable. |
---|
1388 | * |
---|
1389 | * @param the_thread The thread for the verification. |
---|
1390 | * |
---|
1391 | * @retval true @a life_state is joinable. |
---|
1392 | * @retval false @a life_state is not joinable. |
---|
1393 | */ |
---|
1394 | RTEMS_INLINE_ROUTINE bool _Thread_Is_joinable( |
---|
1395 | const Thread_Control *the_thread |
---|
1396 | ) |
---|
1397 | { |
---|
1398 | _Assert( _Thread_State_is_owner( the_thread ) ); |
---|
1399 | return ( the_thread->Life.state & THREAD_LIFE_DETACHED ) == 0; |
---|
1400 | } |
---|
1401 | |
---|
1402 | /** |
---|
1403 | * @brief Increments the thread's resource count. |
---|
1404 | * |
---|
1405 | * @param[in, out] the_thread The thread to increase the resource count of. |
---|
1406 | */ |
---|
1407 | RTEMS_INLINE_ROUTINE void _Thread_Resource_count_increment( |
---|
1408 | Thread_Control *the_thread |
---|
1409 | ) |
---|
1410 | { |
---|
1411 | #if defined(RTEMS_SCORE_THREAD_ENABLE_RESOURCE_COUNT) |
---|
1412 | ++the_thread->resource_count; |
---|
1413 | #else |
---|
1414 | (void) the_thread; |
---|
1415 | #endif |
---|
1416 | } |
---|
1417 | |
---|
1418 | /** |
---|
1419 | * @brief Decrements the thread's resource count. |
---|
1420 | * |
---|
1421 | * @param[in, out] the_thread The thread to decrement the resource count of. |
---|
1422 | */ |
---|
1423 | RTEMS_INLINE_ROUTINE void _Thread_Resource_count_decrement( |
---|
1424 | Thread_Control *the_thread |
---|
1425 | ) |
---|
1426 | { |
---|
1427 | #if defined(RTEMS_SCORE_THREAD_ENABLE_RESOURCE_COUNT) |
---|
1428 | --the_thread->resource_count; |
---|
1429 | #else |
---|
1430 | (void) the_thread; |
---|
1431 | #endif |
---|
1432 | } |
---|
1433 | |
---|
1434 | #if defined(RTEMS_SCORE_THREAD_ENABLE_RESOURCE_COUNT) |
---|
1435 | /** |
---|
1436 | * @brief Checks if the thread owns resources. |
---|
1437 | * |
---|
1438 | * Resources are accounted with the Thread_Control::resource_count resource |
---|
1439 | * counter. This counter is used by mutex objects for example. |
---|
1440 | * |
---|
1441 | * @param the_thread The thread. |
---|
1442 | * |
---|
1443 | * @retval true The thread owns resources. |
---|
1444 | * @retval false The thread does not own resources. |
---|
1445 | */ |
---|
1446 | RTEMS_INLINE_ROUTINE bool _Thread_Owns_resources( |
---|
1447 | const Thread_Control *the_thread |
---|
1448 | ) |
---|
1449 | { |
---|
1450 | return the_thread->resource_count != 0; |
---|
1451 | } |
---|
1452 | #endif |
---|
1453 | |
---|
1454 | #if defined(RTEMS_SMP) |
---|
1455 | /** |
---|
1456 | * @brief Cancels the thread's need for help. |
---|
1457 | * |
---|
1458 | * @param the_thread The thread to cancel the help request of. |
---|
1459 | * @param cpu The cpu to get the lock context of in order to |
---|
1460 | * cancel the help request. |
---|
1461 | */ |
---|
1462 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_cancel_need_for_help( |
---|
1463 | Thread_Control *the_thread, |
---|
1464 | Per_CPU_Control *cpu |
---|
1465 | ) |
---|
1466 | { |
---|
1467 | ISR_lock_Context lock_context; |
---|
1468 | |
---|
1469 | _Per_CPU_Acquire( cpu, &lock_context ); |
---|
1470 | |
---|
1471 | if ( !_Chain_Is_node_off_chain( &the_thread->Scheduler.Help_node ) ) { |
---|
1472 | _Chain_Extract_unprotected( &the_thread->Scheduler.Help_node ); |
---|
1473 | _Chain_Set_off_chain( &the_thread->Scheduler.Help_node ); |
---|
1474 | } |
---|
1475 | |
---|
1476 | _Per_CPU_Release( cpu, &lock_context ); |
---|
1477 | } |
---|
1478 | #endif |
---|
1479 | |
---|
1480 | /** |
---|
1481 | * @brief Gets the home scheduler of the thread. |
---|
1482 | * |
---|
1483 | * @param the_thread The thread to get the home scheduler of. |
---|
1484 | * |
---|
1485 | * @return The thread's home scheduler. |
---|
1486 | */ |
---|
1487 | RTEMS_INLINE_ROUTINE const Scheduler_Control *_Thread_Scheduler_get_home( |
---|
1488 | const Thread_Control *the_thread |
---|
1489 | ) |
---|
1490 | { |
---|
1491 | #if defined(RTEMS_SMP) |
---|
1492 | return the_thread->Scheduler.home_scheduler; |
---|
1493 | #else |
---|
1494 | (void) the_thread; |
---|
1495 | return &_Scheduler_Table[ 0 ]; |
---|
1496 | #endif |
---|
1497 | } |
---|
1498 | |
---|
1499 | /** |
---|
1500 | * @brief Gets the scheduler's home node. |
---|
1501 | * |
---|
1502 | * @param the_thread The thread to get the home node of. |
---|
1503 | * |
---|
1504 | * @return The thread's home node. |
---|
1505 | */ |
---|
1506 | RTEMS_INLINE_ROUTINE Scheduler_Node *_Thread_Scheduler_get_home_node( |
---|
1507 | const Thread_Control *the_thread |
---|
1508 | ) |
---|
1509 | { |
---|
1510 | #if defined(RTEMS_SMP) |
---|
1511 | _Assert( !_Chain_Is_empty( &the_thread->Scheduler.Wait_nodes ) ); |
---|
1512 | return SCHEDULER_NODE_OF_THREAD_WAIT_NODE( |
---|
1513 | _Chain_First( &the_thread->Scheduler.Wait_nodes ) |
---|
1514 | ); |
---|
1515 | #else |
---|
1516 | return the_thread->Scheduler.nodes; |
---|
1517 | #endif |
---|
1518 | } |
---|
1519 | |
---|
1520 | /** |
---|
1521 | * @brief Gets the thread's scheduler node by index. |
---|
1522 | * |
---|
1523 | * @param the_thread The thread of which to get a scheduler node. |
---|
1524 | * @param scheduler_index The index of the desired scheduler node. |
---|
1525 | * |
---|
1526 | * @return The scheduler node with the specified index. |
---|
1527 | */ |
---|
1528 | RTEMS_INLINE_ROUTINE Scheduler_Node *_Thread_Scheduler_get_node_by_index( |
---|
1529 | const Thread_Control *the_thread, |
---|
1530 | size_t scheduler_index |
---|
1531 | ) |
---|
1532 | { |
---|
1533 | #if defined(RTEMS_SMP) |
---|
1534 | return (Scheduler_Node *) |
---|
1535 | ( (uintptr_t) the_thread->Scheduler.nodes |
---|
1536 | + scheduler_index * _Scheduler_Node_size ); |
---|
1537 | #else |
---|
1538 | _Assert( scheduler_index == 0 ); |
---|
1539 | (void) scheduler_index; |
---|
1540 | return the_thread->Scheduler.nodes; |
---|
1541 | #endif |
---|
1542 | } |
---|
1543 | |
---|
1544 | #if defined(RTEMS_SMP) |
---|
1545 | /** |
---|
1546 | * @brief Acquires the lock context in a critical section. |
---|
1547 | * |
---|
1548 | * @param the_thread The thread to acquire the lock context. |
---|
1549 | * @param lock_context The lock context. |
---|
1550 | */ |
---|
1551 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_acquire_critical( |
---|
1552 | Thread_Control *the_thread, |
---|
1553 | ISR_lock_Context *lock_context |
---|
1554 | ) |
---|
1555 | { |
---|
1556 | _ISR_lock_Acquire( &the_thread->Scheduler.Lock, lock_context ); |
---|
1557 | } |
---|
1558 | |
---|
1559 | /** |
---|
1560 | * @brief Releases the lock context in a critical section. |
---|
1561 | * |
---|
1562 | * @param the_thread The thread to release the lock context. |
---|
1563 | * @param lock_context The lock context. |
---|
1564 | */ |
---|
1565 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_release_critical( |
---|
1566 | Thread_Control *the_thread, |
---|
1567 | ISR_lock_Context *lock_context |
---|
1568 | ) |
---|
1569 | { |
---|
1570 | _ISR_lock_Release( &the_thread->Scheduler.Lock, lock_context ); |
---|
1571 | } |
---|
1572 | |
---|
1573 | /** |
---|
1574 | * @brief Process the thread's scheduler requests. |
---|
1575 | * |
---|
1576 | * @param[in, out] the_thread The thread for the operation. |
---|
1577 | */ |
---|
1578 | void _Thread_Scheduler_process_requests( Thread_Control *the_thread ); |
---|
1579 | |
---|
1580 | /** |
---|
1581 | * @brief Add a scheduler request to the thread. |
---|
1582 | * |
---|
1583 | * @param[in, out] the_thread The thread to add a scheduler request to. |
---|
1584 | * @param[in, out] scheduler_node The scheduler node for the request. |
---|
1585 | * @param request The request to add. |
---|
1586 | */ |
---|
1587 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_add_request( |
---|
1588 | Thread_Control *the_thread, |
---|
1589 | Scheduler_Node *scheduler_node, |
---|
1590 | Scheduler_Node_request request |
---|
1591 | ) |
---|
1592 | { |
---|
1593 | ISR_lock_Context lock_context; |
---|
1594 | Scheduler_Node_request current_request; |
---|
1595 | |
---|
1596 | _Thread_Scheduler_acquire_critical( the_thread, &lock_context ); |
---|
1597 | |
---|
1598 | current_request = scheduler_node->Thread.request; |
---|
1599 | |
---|
1600 | if ( current_request == SCHEDULER_NODE_REQUEST_NOT_PENDING ) { |
---|
1601 | _Assert( |
---|
1602 | request == SCHEDULER_NODE_REQUEST_ADD |
---|
1603 | || request == SCHEDULER_NODE_REQUEST_REMOVE |
---|
1604 | ); |
---|
1605 | _Assert( scheduler_node->Thread.next_request == NULL ); |
---|
1606 | scheduler_node->Thread.next_request = the_thread->Scheduler.requests; |
---|
1607 | the_thread->Scheduler.requests = scheduler_node; |
---|
1608 | } else if ( current_request != SCHEDULER_NODE_REQUEST_NOTHING ) { |
---|
1609 | _Assert( |
---|
1610 | ( current_request == SCHEDULER_NODE_REQUEST_ADD |
---|
1611 | && request == SCHEDULER_NODE_REQUEST_REMOVE ) |
---|
1612 | || ( current_request == SCHEDULER_NODE_REQUEST_REMOVE |
---|
1613 | && request == SCHEDULER_NODE_REQUEST_ADD ) |
---|
1614 | ); |
---|
1615 | request = SCHEDULER_NODE_REQUEST_NOTHING; |
---|
1616 | } |
---|
1617 | |
---|
1618 | scheduler_node->Thread.request = request; |
---|
1619 | |
---|
1620 | _Thread_Scheduler_release_critical( the_thread, &lock_context ); |
---|
1621 | } |
---|
1622 | |
---|
1623 | /** |
---|
1624 | * @brief Adds a wait node to the thread and adds a corresponding |
---|
1625 | * request to the thread. |
---|
1626 | * |
---|
1627 | * @param[in, out] the_thread The thread to add the wait node to. |
---|
1628 | * @param scheduler_node The scheduler node which provides the wait node. |
---|
1629 | */ |
---|
1630 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_add_wait_node( |
---|
1631 | Thread_Control *the_thread, |
---|
1632 | Scheduler_Node *scheduler_node |
---|
1633 | ) |
---|
1634 | { |
---|
1635 | _Chain_Append_unprotected( |
---|
1636 | &the_thread->Scheduler.Wait_nodes, |
---|
1637 | &scheduler_node->Thread.Wait_node |
---|
1638 | ); |
---|
1639 | _Thread_Scheduler_add_request( |
---|
1640 | the_thread, |
---|
1641 | scheduler_node, |
---|
1642 | SCHEDULER_NODE_REQUEST_ADD |
---|
1643 | ); |
---|
1644 | } |
---|
1645 | |
---|
1646 | /** |
---|
1647 | * @brief Remove a wait node from the thread and add a corresponding request to |
---|
1648 | * it. |
---|
1649 | * |
---|
1650 | * @param the_thread The thread to add the request to remove a wait node. |
---|
1651 | * @param scheduler_node The scheduler node to remove a wait node from. |
---|
1652 | */ |
---|
1653 | RTEMS_INLINE_ROUTINE void _Thread_Scheduler_remove_wait_node( |
---|
1654 | Thread_Control *the_thread, |
---|
1655 | Scheduler_Node *scheduler_node |
---|
1656 | ) |
---|
1657 | { |
---|
1658 | _Chain_Extract_unprotected( &scheduler_node->Thread.Wait_node ); |
---|
1659 | _Thread_Scheduler_add_request( |
---|
1660 | the_thread, |
---|
1661 | scheduler_node, |
---|
1662 | SCHEDULER_NODE_REQUEST_REMOVE |
---|
1663 | ); |
---|
1664 | } |
---|
1665 | #endif |
---|
1666 | |
---|
1667 | /** |
---|
1668 | * @brief Returns the priority of the thread. |
---|
1669 | * |
---|
1670 | * Returns the user API and thread wait information relevant thread priority. |
---|
1671 | * This includes temporary thread priority adjustments due to locking |
---|
1672 | * protocols, a job release or the POSIX sporadic server for example. |
---|
1673 | * |
---|
1674 | * @param the_thread The thread of which to get the priority. |
---|
1675 | * |
---|
1676 | * @return The priority of the thread. |
---|
1677 | */ |
---|
1678 | RTEMS_INLINE_ROUTINE Priority_Control _Thread_Get_priority( |
---|
1679 | const Thread_Control *the_thread |
---|
1680 | ) |
---|
1681 | { |
---|
1682 | Scheduler_Node *scheduler_node; |
---|
1683 | |
---|
1684 | scheduler_node = _Thread_Scheduler_get_home_node( the_thread ); |
---|
1685 | return _Priority_Get_priority( &scheduler_node->Wait.Priority ); |
---|
1686 | } |
---|
1687 | |
---|
1688 | /** |
---|
1689 | * @brief Returns the unmapped priority of the thread. |
---|
1690 | * |
---|
1691 | * @param the_thread The thread of which to get the unmapped priority. |
---|
1692 | * |
---|
1693 | * @return The unmapped priority of the thread. |
---|
1694 | */ |
---|
1695 | RTEMS_INLINE_ROUTINE Priority_Control _Thread_Get_unmapped_priority( |
---|
1696 | const Thread_Control *the_thread |
---|
1697 | ) |
---|
1698 | { |
---|
1699 | return SCHEDULER_PRIORITY_UNMAP( _Thread_Get_priority( the_thread ) ); |
---|
1700 | } |
---|
1701 | |
---|
1702 | /** |
---|
1703 | * @brief Returns the unmapped real priority of the thread. |
---|
1704 | * |
---|
1705 | * @param the_thread The thread of which to get the unmapped real priority. |
---|
1706 | * |
---|
1707 | * @return The unmapped real priority of the thread. |
---|
1708 | */ |
---|
1709 | RTEMS_INLINE_ROUTINE Priority_Control _Thread_Get_unmapped_real_priority( |
---|
1710 | const Thread_Control *the_thread |
---|
1711 | ) |
---|
1712 | { |
---|
1713 | return SCHEDULER_PRIORITY_UNMAP( the_thread->Real_priority.priority ); |
---|
1714 | } |
---|
1715 | |
---|
1716 | /** |
---|
1717 | * @brief Acquires the thread wait default lock inside a critical section |
---|
1718 | * (interrupts disabled). |
---|
1719 | * |
---|
1720 | * @param[in, out] the_thread The thread. |
---|
1721 | * @param lock_context The lock context used for the corresponding lock |
---|
1722 | * release. |
---|
1723 | * |
---|
1724 | * @see _Thread_Wait_release_default_critical(). |
---|
1725 | */ |
---|
1726 | RTEMS_INLINE_ROUTINE void _Thread_Wait_acquire_default_critical( |
---|
1727 | Thread_Control *the_thread, |
---|
1728 | ISR_lock_Context *lock_context |
---|
1729 | ) |
---|
1730 | { |
---|
1731 | _ISR_lock_Acquire( &the_thread->Wait.Lock.Default, lock_context ); |
---|
1732 | } |
---|
1733 | |
---|
1734 | /** |
---|
1735 | * @brief Acquires the thread wait default lock and returns the executing |
---|
1736 | * thread. |
---|
1737 | * |
---|
1738 | * @param lock_context The lock context used for the corresponding lock |
---|
1739 | * release. |
---|
1740 | * |
---|
1741 | * @return The executing thread. |
---|
1742 | * |
---|
1743 | * @see _Thread_Wait_release_default(). |
---|
1744 | */ |
---|
1745 | RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Wait_acquire_default_for_executing( |
---|
1746 | ISR_lock_Context *lock_context |
---|
1747 | ) |
---|
1748 | { |
---|
1749 | Thread_Control *executing; |
---|
1750 | |
---|
1751 | _ISR_lock_ISR_disable( lock_context ); |
---|
1752 | executing = _Thread_Executing; |
---|
1753 | _Thread_Wait_acquire_default_critical( executing, lock_context ); |
---|
1754 | |
---|
1755 | return executing; |
---|
1756 | } |
---|
1757 | |
---|
1758 | /** |
---|
1759 | * @brief Acquires the thread wait default lock and disables interrupts. |
---|
1760 | * |
---|
1761 | * @param[in, out] the_thread The thread. |
---|
1762 | * @param[out] lock_context The lock context used for the corresponding lock |
---|
1763 | * release. |
---|
1764 | * |
---|
1765 | * @see _Thread_Wait_release_default(). |
---|
1766 | */ |
---|
1767 | RTEMS_INLINE_ROUTINE void _Thread_Wait_acquire_default( |
---|
1768 | Thread_Control *the_thread, |
---|
1769 | ISR_lock_Context *lock_context |
---|
1770 | ) |
---|
1771 | { |
---|
1772 | _ISR_lock_ISR_disable( lock_context ); |
---|
1773 | _Thread_Wait_acquire_default_critical( the_thread, lock_context ); |
---|
1774 | } |
---|
1775 | |
---|
1776 | /** |
---|
1777 | * @brief Releases the thread wait default lock inside a critical section |
---|
1778 | * (interrupts disabled). |
---|
1779 | * |
---|
1780 | * The previous interrupt status is not restored. |
---|
1781 | * |
---|
1782 | * @param[in, out] the_thread The thread. |
---|
1783 | * @param lock_context The lock context used for the corresponding lock |
---|
1784 | * acquire. |
---|
1785 | */ |
---|
1786 | RTEMS_INLINE_ROUTINE void _Thread_Wait_release_default_critical( |
---|
1787 | Thread_Control *the_thread, |
---|
1788 | ISR_lock_Context *lock_context |
---|
1789 | ) |
---|
1790 | { |
---|
1791 | _ISR_lock_Release( &the_thread->Wait.Lock.Default, lock_context ); |
---|
1792 | } |
---|
1793 | |
---|
1794 | /** |
---|
1795 | * @brief Releases the thread wait default lock and restores the previous |
---|
1796 | * interrupt status. |
---|
1797 | * |
---|
1798 | * @param[in, out] the_thread The thread. |
---|
1799 | * @param[out] lock_context The lock context used for the corresponding lock |
---|
1800 | * acquire. |
---|
1801 | */ |
---|
1802 | RTEMS_INLINE_ROUTINE void _Thread_Wait_release_default( |
---|
1803 | Thread_Control *the_thread, |
---|
1804 | ISR_lock_Context *lock_context |
---|
1805 | ) |
---|
1806 | { |
---|
1807 | _Thread_Wait_release_default_critical( the_thread, lock_context ); |
---|
1808 | _ISR_lock_ISR_enable( lock_context ); |
---|
1809 | } |
---|
1810 | |
---|
1811 | #if defined(RTEMS_SMP) |
---|
1812 | #define THREAD_QUEUE_CONTEXT_OF_REQUEST( node ) \ |
---|
1813 | RTEMS_CONTAINER_OF( node, Thread_queue_Context, Lock_context.Wait.Gate.Node ) |
---|
1814 | |
---|
1815 | /** |
---|
1816 | * @brief Removes the first pending wait lock request. |
---|
1817 | * |
---|
1818 | * @param the_thread The thread to remove the request from. |
---|
1819 | * @param queue_lock_context The queue lock context. |
---|
1820 | */ |
---|
1821 | RTEMS_INLINE_ROUTINE void _Thread_Wait_remove_request_locked( |
---|
1822 | Thread_Control *the_thread, |
---|
1823 | Thread_queue_Lock_context *queue_lock_context |
---|
1824 | ) |
---|
1825 | { |
---|
1826 | Chain_Node *first; |
---|
1827 | |
---|
1828 | _Chain_Extract_unprotected( &queue_lock_context->Wait.Gate.Node ); |
---|
1829 | first = _Chain_First( &the_thread->Wait.Lock.Pending_requests ); |
---|
1830 | |
---|
1831 | if ( first != _Chain_Tail( &the_thread->Wait.Lock.Pending_requests ) ) { |
---|
1832 | _Thread_queue_Gate_open( (Thread_queue_Gate *) first ); |
---|
1833 | } |
---|
1834 | } |
---|
1835 | |
---|
1836 | /** |
---|
1837 | * @brief Acquires the wait queue inside a critical section. |
---|
1838 | * |
---|
1839 | * @param queue The queue that acquires. |
---|
1840 | * @param queue_lock_context The queue lock context. |
---|
1841 | */ |
---|
1842 | RTEMS_INLINE_ROUTINE void _Thread_Wait_acquire_queue_critical( |
---|
1843 | Thread_queue_Queue *queue, |
---|
1844 | Thread_queue_Lock_context *queue_lock_context |
---|
1845 | ) |
---|
1846 | { |
---|
1847 | _Thread_queue_Queue_acquire_critical( |
---|
1848 | queue, |
---|
1849 | &_Thread_Executing->Potpourri_stats, |
---|
1850 | &queue_lock_context->Lock_context |
---|
1851 | ); |
---|
1852 | } |
---|
1853 | |
---|
1854 | /** |
---|
1855 | * @brief Releases the wait queue inside a critical section. |
---|
1856 | * |
---|
1857 | * @param queue The queue that releases. |
---|
1858 | * @param queue_lock_context The queue lock context. |
---|
1859 | */ |
---|
1860 | RTEMS_INLINE_ROUTINE void _Thread_Wait_release_queue_critical( |
---|
1861 | Thread_queue_Queue *queue, |
---|
1862 | Thread_queue_Lock_context *queue_lock_context |
---|
1863 | ) |
---|
1864 | { |
---|
1865 | _Thread_queue_Queue_release_critical( |
---|
1866 | queue, |
---|
1867 | &queue_lock_context->Lock_context |
---|
1868 | ); |
---|
1869 | } |
---|
1870 | #endif |
---|
1871 | |
---|
1872 | /** |
---|
1873 | * @brief Acquires the thread wait lock inside a critical section (interrupts |
---|
1874 | * disabled). |
---|
1875 | * |
---|
1876 | * @param[in, out] the_thread The thread. |
---|
1877 | * @param[in, out] queue_context The thread queue context for the corresponding |
---|
1878 | * _Thread_Wait_release_critical(). |
---|
1879 | */ |
---|
1880 | RTEMS_INLINE_ROUTINE void _Thread_Wait_acquire_critical( |
---|
1881 | Thread_Control *the_thread, |
---|
1882 | Thread_queue_Context *queue_context |
---|
1883 | ) |
---|
1884 | { |
---|
1885 | #if defined(RTEMS_SMP) |
---|
1886 | Thread_queue_Queue *queue; |
---|
1887 | |
---|
1888 | _Thread_Wait_acquire_default_critical( |
---|
1889 | the_thread, |
---|
1890 | &queue_context->Lock_context.Lock_context |
---|
1891 | ); |
---|
1892 | |
---|
1893 | queue = the_thread->Wait.queue; |
---|
1894 | queue_context->Lock_context.Wait.queue = queue; |
---|
1895 | |
---|
1896 | if ( queue != NULL ) { |
---|
1897 | _Thread_queue_Gate_add( |
---|
1898 | &the_thread->Wait.Lock.Pending_requests, |
---|
1899 | &queue_context->Lock_context.Wait.Gate |
---|
1900 | ); |
---|
1901 | _Thread_Wait_release_default_critical( |
---|
1902 | the_thread, |
---|
1903 | &queue_context->Lock_context.Lock_context |
---|
1904 | ); |
---|
1905 | _Thread_Wait_acquire_queue_critical( queue, &queue_context->Lock_context ); |
---|
1906 | |
---|
1907 | if ( queue_context->Lock_context.Wait.queue == NULL ) { |
---|
1908 | _Thread_Wait_release_queue_critical( |
---|
1909 | queue, |
---|
1910 | &queue_context->Lock_context |
---|
1911 | ); |
---|
1912 | _Thread_Wait_acquire_default_critical( |
---|
1913 | the_thread, |
---|
1914 | &queue_context->Lock_context.Lock_context |
---|
1915 | ); |
---|
1916 | _Thread_Wait_remove_request_locked( |
---|
1917 | the_thread, |
---|
1918 | &queue_context->Lock_context |
---|
1919 | ); |
---|
1920 | _Assert( the_thread->Wait.queue == NULL ); |
---|
1921 | } |
---|
1922 | } |
---|
1923 | #else |
---|
1924 | (void) the_thread; |
---|
1925 | (void) queue_context; |
---|
1926 | #endif |
---|
1927 | } |
---|
1928 | |
---|
1929 | /** |
---|
1930 | * @brief Acquires the thread wait default lock and disables interrupts. |
---|
1931 | * |
---|
1932 | * @param[in, out] the_thread The thread. |
---|
1933 | * @param[in, out] queue_context The thread queue context for the corresponding |
---|
1934 | * _Thread_Wait_release(). |
---|
1935 | */ |
---|
1936 | RTEMS_INLINE_ROUTINE void _Thread_Wait_acquire( |
---|
1937 | Thread_Control *the_thread, |
---|
1938 | Thread_queue_Context *queue_context |
---|
1939 | ) |
---|
1940 | { |
---|
1941 | _ISR_lock_ISR_disable( &queue_context->Lock_context.Lock_context ); |
---|
1942 | _Thread_Wait_acquire_critical( the_thread, queue_context ); |
---|
1943 | } |
---|
1944 | |
---|
1945 | /** |
---|
1946 | * @brief Releases the thread wait lock inside a critical section (interrupts |
---|
1947 | * disabled). |
---|
1948 | * |
---|
1949 | * The previous interrupt status is not restored. |
---|
1950 | * |
---|
1951 | * @param[in, out] the_thread The thread. |
---|
1952 | * @param[in, out] queue_context The thread queue context used for corresponding |
---|
1953 | * _Thread_Wait_acquire_critical(). |
---|
1954 | */ |
---|
1955 | RTEMS_INLINE_ROUTINE void _Thread_Wait_release_critical( |
---|
1956 | Thread_Control *the_thread, |
---|
1957 | Thread_queue_Context *queue_context |
---|
1958 | ) |
---|
1959 | { |
---|
1960 | #if defined(RTEMS_SMP) |
---|
1961 | Thread_queue_Queue *queue; |
---|
1962 | |
---|
1963 | queue = queue_context->Lock_context.Wait.queue; |
---|
1964 | |
---|
1965 | if ( queue != NULL ) { |
---|
1966 | _Thread_Wait_release_queue_critical( |
---|
1967 | queue, &queue_context->Lock_context |
---|
1968 | ); |
---|
1969 | _Thread_Wait_acquire_default_critical( |
---|
1970 | the_thread, |
---|
1971 | &queue_context->Lock_context.Lock_context |
---|
1972 | ); |
---|
1973 | _Thread_Wait_remove_request_locked( |
---|
1974 | the_thread, |
---|
1975 | &queue_context->Lock_context |
---|
1976 | ); |
---|
1977 | } |
---|
1978 | |
---|
1979 | _Thread_Wait_release_default_critical( |
---|
1980 | the_thread, |
---|
1981 | &queue_context->Lock_context.Lock_context |
---|
1982 | ); |
---|
1983 | #else |
---|
1984 | (void) the_thread; |
---|
1985 | (void) queue_context; |
---|
1986 | #endif |
---|
1987 | } |
---|
1988 | |
---|
1989 | /** |
---|
1990 | * @brief Releases the thread wait lock and restores the previous interrupt |
---|
1991 | * status. |
---|
1992 | * |
---|
1993 | * @param[in, out] the_thread The thread. |
---|
1994 | * @param[in, out] queue_context The thread queue context used for corresponding |
---|
1995 | * _Thread_Wait_acquire(). |
---|
1996 | */ |
---|
1997 | RTEMS_INLINE_ROUTINE void _Thread_Wait_release( |
---|
1998 | Thread_Control *the_thread, |
---|
1999 | Thread_queue_Context *queue_context |
---|
2000 | ) |
---|
2001 | { |
---|
2002 | _Thread_Wait_release_critical( the_thread, queue_context ); |
---|
2003 | _ISR_lock_ISR_enable( &queue_context->Lock_context.Lock_context ); |
---|
2004 | } |
---|
2005 | |
---|
2006 | /** |
---|
2007 | * @brief Claims the thread wait queue. |
---|
2008 | * |
---|
2009 | * The caller must not be the owner of the default thread wait lock. The |
---|
2010 | * caller must be the owner of the corresponding thread queue lock. The |
---|
2011 | * registration of the corresponding thread queue operations is deferred and |
---|
2012 | * done after the deadlock detection. This is crucial to support timeouts on |
---|
2013 | * SMP configurations. |
---|
2014 | * |
---|
2015 | * @param[in, out] the_thread The thread. |
---|
2016 | * @param[in, out] queue The new thread queue. |
---|
2017 | * |
---|
2018 | * @see _Thread_Wait_claim_finalize() and _Thread_Wait_restore_default(). |
---|
2019 | */ |
---|
2020 | RTEMS_INLINE_ROUTINE void _Thread_Wait_claim( |
---|
2021 | Thread_Control *the_thread, |
---|
2022 | Thread_queue_Queue *queue |
---|
2023 | ) |
---|
2024 | { |
---|
2025 | ISR_lock_Context lock_context; |
---|
2026 | |
---|
2027 | _Thread_Wait_acquire_default_critical( the_thread, &lock_context ); |
---|
2028 | |
---|
2029 | _Assert( the_thread->Wait.queue == NULL ); |
---|
2030 | |
---|
2031 | #if defined(RTEMS_SMP) |
---|
2032 | _Chain_Initialize_empty( &the_thread->Wait.Lock.Pending_requests ); |
---|
2033 | _Chain_Initialize_node( &the_thread->Wait.Lock.Tranquilizer.Node ); |
---|
2034 | _Thread_queue_Gate_close( &the_thread->Wait.Lock.Tranquilizer ); |
---|
2035 | #endif |
---|
2036 | |
---|
2037 | the_thread->Wait.queue = queue; |
---|
2038 | |
---|
2039 | _Thread_Wait_release_default_critical( the_thread, &lock_context ); |
---|
2040 | } |
---|
2041 | |
---|
2042 | /** |
---|
2043 | * @brief Finalizes the thread wait queue claim via registration of the |
---|
2044 | * corresponding thread queue operations. |
---|
2045 | * |
---|
2046 | * @param[in, out] the_thread The thread. |
---|
2047 | * @param operations The corresponding thread queue operations. |
---|
2048 | */ |
---|
2049 | RTEMS_INLINE_ROUTINE void _Thread_Wait_claim_finalize( |
---|
2050 | Thread_Control *the_thread, |
---|
2051 | const Thread_queue_Operations *operations |
---|
2052 | ) |
---|
2053 | { |
---|
2054 | the_thread->Wait.operations = operations; |
---|
2055 | } |
---|
2056 | |
---|
2057 | /** |
---|
2058 | * @brief Removes a thread wait lock request. |
---|
2059 | * |
---|
2060 | * On SMP configurations, removes a thread wait lock request. |
---|
2061 | * |
---|
2062 | * On other configurations, this function does nothing. |
---|
2063 | * |
---|
2064 | * @param[in, out] the_thread The thread. |
---|
2065 | * @param[in, out] queue_lock_context The thread queue lock context used for |
---|
2066 | * corresponding _Thread_Wait_acquire(). |
---|
2067 | */ |
---|
2068 | RTEMS_INLINE_ROUTINE void _Thread_Wait_remove_request( |
---|
2069 | Thread_Control *the_thread, |
---|
2070 | Thread_queue_Lock_context *queue_lock_context |
---|
2071 | ) |
---|
2072 | { |
---|
2073 | #if defined(RTEMS_SMP) |
---|
2074 | ISR_lock_Context lock_context; |
---|
2075 | |
---|
2076 | _Thread_Wait_acquire_default( the_thread, &lock_context ); |
---|
2077 | _Thread_Wait_remove_request_locked( the_thread, queue_lock_context ); |
---|
2078 | _Thread_Wait_release_default( the_thread, &lock_context ); |
---|
2079 | #else |
---|
2080 | (void) the_thread; |
---|
2081 | (void) queue_lock_context; |
---|
2082 | #endif |
---|
2083 | } |
---|
2084 | |
---|
2085 | /** |
---|
2086 | * @brief Restores the default thread wait queue and operations. |
---|
2087 | * |
---|
2088 | * The caller must be the owner of the current thread wait queue lock. |
---|
2089 | * |
---|
2090 | * On SMP configurations, the pending requests are updated to use the stale |
---|
2091 | * thread queue operations. |
---|
2092 | * |
---|
2093 | * @param[in, out] the_thread The thread. |
---|
2094 | * |
---|
2095 | * @see _Thread_Wait_claim(). |
---|
2096 | */ |
---|
2097 | RTEMS_INLINE_ROUTINE void _Thread_Wait_restore_default( |
---|
2098 | Thread_Control *the_thread |
---|
2099 | ) |
---|
2100 | { |
---|
2101 | #if defined(RTEMS_SMP) |
---|
2102 | ISR_lock_Context lock_context; |
---|
2103 | Chain_Node *node; |
---|
2104 | const Chain_Node *tail; |
---|
2105 | |
---|
2106 | _Thread_Wait_acquire_default_critical( the_thread, &lock_context ); |
---|
2107 | |
---|
2108 | node = _Chain_First( &the_thread->Wait.Lock.Pending_requests ); |
---|
2109 | tail = _Chain_Immutable_tail( &the_thread->Wait.Lock.Pending_requests ); |
---|
2110 | |
---|
2111 | if ( node != tail ) { |
---|
2112 | do { |
---|
2113 | Thread_queue_Context *queue_context; |
---|
2114 | |
---|
2115 | queue_context = THREAD_QUEUE_CONTEXT_OF_REQUEST( node ); |
---|
2116 | queue_context->Lock_context.Wait.queue = NULL; |
---|
2117 | |
---|
2118 | node = _Chain_Next( node ); |
---|
2119 | } while ( node != tail ); |
---|
2120 | |
---|
2121 | _Thread_queue_Gate_add( |
---|
2122 | &the_thread->Wait.Lock.Pending_requests, |
---|
2123 | &the_thread->Wait.Lock.Tranquilizer |
---|
2124 | ); |
---|
2125 | } else { |
---|
2126 | _Thread_queue_Gate_open( &the_thread->Wait.Lock.Tranquilizer ); |
---|
2127 | } |
---|
2128 | #endif |
---|
2129 | |
---|
2130 | the_thread->Wait.queue = NULL; |
---|
2131 | the_thread->Wait.operations = &_Thread_queue_Operations_default; |
---|
2132 | |
---|
2133 | #if defined(RTEMS_SMP) |
---|
2134 | _Thread_Wait_release_default_critical( the_thread, &lock_context ); |
---|
2135 | #endif |
---|
2136 | } |
---|
2137 | |
---|
2138 | /** |
---|
2139 | * @brief Tranquilizes the thread after a wait on a thread queue. |
---|
2140 | * |
---|
2141 | * After the violent blocking procedure this function makes the thread calm and |
---|
2142 | * peaceful again so that it can carry out its normal work. |
---|
2143 | * |
---|
2144 | * On SMP configurations, ensures that all pending thread wait lock requests |
---|
2145 | * completed before the thread is able to begin a new thread wait procedure. |
---|
2146 | * |
---|
2147 | * On other configurations, this function does nothing. |
---|
2148 | * |
---|
2149 | * It must be called after a _Thread_Wait_claim() exactly once |
---|
2150 | * - after the corresponding thread queue lock was released, and |
---|
2151 | * - the default wait state is restored or some other processor is about to do |
---|
2152 | * this. |
---|
2153 | * |
---|
2154 | * @param the_thread The thread. |
---|
2155 | */ |
---|
2156 | RTEMS_INLINE_ROUTINE void _Thread_Wait_tranquilize( |
---|
2157 | Thread_Control *the_thread |
---|
2158 | ) |
---|
2159 | { |
---|
2160 | #if defined(RTEMS_SMP) |
---|
2161 | _Thread_queue_Gate_wait( &the_thread->Wait.Lock.Tranquilizer ); |
---|
2162 | #else |
---|
2163 | (void) the_thread; |
---|
2164 | #endif |
---|
2165 | } |
---|
2166 | |
---|
2167 | /** |
---|
2168 | * @brief Cancels a thread wait on a thread queue. |
---|
2169 | * |
---|
2170 | * @param[in, out] the_thread The thread. |
---|
2171 | * @param queue_context The thread queue context used for corresponding |
---|
2172 | * _Thread_Wait_acquire(). |
---|
2173 | */ |
---|
2174 | RTEMS_INLINE_ROUTINE void _Thread_Wait_cancel( |
---|
2175 | Thread_Control *the_thread, |
---|
2176 | Thread_queue_Context *queue_context |
---|
2177 | ) |
---|
2178 | { |
---|
2179 | Thread_queue_Queue *queue; |
---|
2180 | |
---|
2181 | queue = the_thread->Wait.queue; |
---|
2182 | |
---|
2183 | #if defined(RTEMS_SMP) |
---|
2184 | if ( queue != NULL ) { |
---|
2185 | _Assert( queue_context->Lock_context.Wait.queue == queue ); |
---|
2186 | #endif |
---|
2187 | |
---|
2188 | ( *the_thread->Wait.operations->extract )( |
---|
2189 | queue, |
---|
2190 | the_thread, |
---|
2191 | queue_context |
---|
2192 | ); |
---|
2193 | _Thread_Wait_restore_default( the_thread ); |
---|
2194 | |
---|
2195 | #if defined(RTEMS_SMP) |
---|
2196 | _Assert( queue_context->Lock_context.Wait.queue == NULL ); |
---|
2197 | queue_context->Lock_context.Wait.queue = queue; |
---|
2198 | } |
---|
2199 | #endif |
---|
2200 | } |
---|
2201 | |
---|
2202 | /** |
---|
2203 | * @brief The initial thread wait flags value set by _Thread_Initialize(). |
---|
2204 | */ |
---|
2205 | #define THREAD_WAIT_FLAGS_INITIAL 0x0U |
---|
2206 | |
---|
2207 | /** |
---|
2208 | * @brief Mask to get the thread wait state flags. |
---|
2209 | */ |
---|
2210 | #define THREAD_WAIT_STATE_MASK 0xffU |
---|
2211 | |
---|
2212 | /** |
---|
2213 | * @brief Indicates that the thread begins with the blocking operation. |
---|
2214 | * |
---|
2215 | * A blocking operation consists of an optional watchdog initialization and the |
---|
2216 | * setting of the appropriate thread blocking state with the corresponding |
---|
2217 | * scheduler block operation. |
---|
2218 | */ |
---|
2219 | #define THREAD_WAIT_STATE_INTEND_TO_BLOCK 0x1U |
---|
2220 | |
---|
2221 | /** |
---|
2222 | * @brief Indicates that the thread completed the blocking operation. |
---|
2223 | */ |
---|
2224 | #define THREAD_WAIT_STATE_BLOCKED 0x2U |
---|
2225 | |
---|
2226 | /** |
---|
2227 | * @brief Indicates that a condition to end the thread wait occurred. |
---|
2228 | * |
---|
2229 | * This could be a timeout, a signal, an event or a resource availability. |
---|
2230 | */ |
---|
2231 | #define THREAD_WAIT_STATE_READY_AGAIN 0x4U |
---|
2232 | |
---|
2233 | /** |
---|
2234 | * @brief Mask to get the thread wait class flags. |
---|
2235 | */ |
---|
2236 | #define THREAD_WAIT_CLASS_MASK 0xff00U |
---|
2237 | |
---|
2238 | /** |
---|
2239 | * @brief Indicates that the thread waits for an event. |
---|
2240 | */ |
---|
2241 | #define THREAD_WAIT_CLASS_EVENT 0x100U |
---|
2242 | |
---|
2243 | /** |
---|
2244 | * @brief Indicates that the thread waits for a system event. |
---|
2245 | */ |
---|
2246 | #define THREAD_WAIT_CLASS_SYSTEM_EVENT 0x200U |
---|
2247 | |
---|
2248 | /** |
---|
2249 | * @brief Indicates that the thread waits for an object. |
---|
2250 | */ |
---|
2251 | #define THREAD_WAIT_CLASS_OBJECT 0x400U |
---|
2252 | |
---|
2253 | /** |
---|
2254 | * @brief Indicates that the thread waits for a period. |
---|
2255 | */ |
---|
2256 | #define THREAD_WAIT_CLASS_PERIOD 0x800U |
---|
2257 | |
---|
2258 | /** |
---|
2259 | * @brief Sets the thread's wait flags. |
---|
2260 | * |
---|
2261 | * @param[in, out] the_thread The thread to set the wait flags of. |
---|
2262 | * @param flags The flags to set. |
---|
2263 | */ |
---|
2264 | RTEMS_INLINE_ROUTINE void _Thread_Wait_flags_set( |
---|
2265 | Thread_Control *the_thread, |
---|
2266 | Thread_Wait_flags flags |
---|
2267 | ) |
---|
2268 | { |
---|
2269 | #if defined(RTEMS_SMP) |
---|
2270 | _Atomic_Store_uint( &the_thread->Wait.flags, flags, ATOMIC_ORDER_RELAXED ); |
---|
2271 | #else |
---|
2272 | the_thread->Wait.flags = flags; |
---|
2273 | #endif |
---|
2274 | } |
---|
2275 | |
---|
2276 | /** |
---|
2277 | * @brief Gets the thread's wait flags according to the ATOMIC_ORDER_RELAXED. |
---|
2278 | * |
---|
2279 | * @param the_thread The thread to get the wait flags of. |
---|
2280 | * |
---|
2281 | * @return The thread's wait flags. |
---|
2282 | */ |
---|
2283 | RTEMS_INLINE_ROUTINE Thread_Wait_flags _Thread_Wait_flags_get( |
---|
2284 | const Thread_Control *the_thread |
---|
2285 | ) |
---|
2286 | { |
---|
2287 | #if defined(RTEMS_SMP) |
---|
2288 | return _Atomic_Load_uint( &the_thread->Wait.flags, ATOMIC_ORDER_RELAXED ); |
---|
2289 | #else |
---|
2290 | return the_thread->Wait.flags; |
---|
2291 | #endif |
---|
2292 | } |
---|
2293 | |
---|
2294 | /** |
---|
2295 | * @brief Gets the thread's wait flags according to the ATOMIC_ORDER_ACQUIRE. |
---|
2296 | * |
---|
2297 | * @param the_thread The thread to get the wait flags of. |
---|
2298 | * |
---|
2299 | * @return The thread's wait flags. |
---|
2300 | */ |
---|
2301 | RTEMS_INLINE_ROUTINE Thread_Wait_flags _Thread_Wait_flags_get_acquire( |
---|
2302 | const Thread_Control *the_thread |
---|
2303 | ) |
---|
2304 | { |
---|
2305 | #if defined(RTEMS_SMP) |
---|
2306 | return _Atomic_Load_uint( &the_thread->Wait.flags, ATOMIC_ORDER_ACQUIRE ); |
---|
2307 | #else |
---|
2308 | return the_thread->Wait.flags; |
---|
2309 | #endif |
---|
2310 | } |
---|
2311 | |
---|
2312 | /** |
---|
2313 | * @brief Tries to change the thread wait flags with release semantics in case |
---|
2314 | * of success. |
---|
2315 | * |
---|
2316 | * Must be called inside a critical section (interrupts disabled). |
---|
2317 | * |
---|
2318 | * In case the wait flags are equal to the expected wait flags, then the wait |
---|
2319 | * flags are set to the desired wait flags. |
---|
2320 | * |
---|
2321 | * @param the_thread The thread. |
---|
2322 | * @param expected_flags The expected wait flags. |
---|
2323 | * @param desired_flags The desired wait flags. |
---|
2324 | * |
---|
2325 | * @retval true The wait flags were equal to the expected wait flags. |
---|
2326 | * @retval false The wait flags were not equal to the expected wait flags. |
---|
2327 | */ |
---|
2328 | RTEMS_INLINE_ROUTINE bool _Thread_Wait_flags_try_change_release( |
---|
2329 | Thread_Control *the_thread, |
---|
2330 | Thread_Wait_flags expected_flags, |
---|
2331 | Thread_Wait_flags desired_flags |
---|
2332 | ) |
---|
2333 | { |
---|
2334 | _Assert( _ISR_Get_level() != 0 ); |
---|
2335 | |
---|
2336 | #if defined(RTEMS_SMP) |
---|
2337 | return _Atomic_Compare_exchange_uint( |
---|
2338 | &the_thread->Wait.flags, |
---|
2339 | &expected_flags, |
---|
2340 | desired_flags, |
---|
2341 | ATOMIC_ORDER_RELEASE, |
---|
2342 | ATOMIC_ORDER_RELAXED |
---|
2343 | ); |
---|
2344 | #else |
---|
2345 | bool success = ( the_thread->Wait.flags == expected_flags ); |
---|
2346 | |
---|
2347 | if ( success ) { |
---|
2348 | the_thread->Wait.flags = desired_flags; |
---|
2349 | } |
---|
2350 | |
---|
2351 | return success; |
---|
2352 | #endif |
---|
2353 | } |
---|
2354 | |
---|
2355 | /** |
---|
2356 | * @brief Tries to change the thread wait flags with acquire semantics. |
---|
2357 | * |
---|
2358 | * In case the wait flags are equal to the expected wait flags, then the wait |
---|
2359 | * flags are set to the desired wait flags. |
---|
2360 | * |
---|
2361 | * @param the_thread The thread. |
---|
2362 | * @param expected_flags The expected wait flags. |
---|
2363 | * @param desired_flags The desired wait flags. |
---|
2364 | * |
---|
2365 | * @retval true The wait flags were equal to the expected wait flags. |
---|
2366 | * @retval false The wait flags were not equal to the expected wait flags. |
---|
2367 | */ |
---|
2368 | RTEMS_INLINE_ROUTINE bool _Thread_Wait_flags_try_change_acquire( |
---|
2369 | Thread_Control *the_thread, |
---|
2370 | Thread_Wait_flags expected_flags, |
---|
2371 | Thread_Wait_flags desired_flags |
---|
2372 | ) |
---|
2373 | { |
---|
2374 | #if defined(RTEMS_SMP) |
---|
2375 | return _Atomic_Compare_exchange_uint( |
---|
2376 | &the_thread->Wait.flags, |
---|
2377 | &expected_flags, |
---|
2378 | desired_flags, |
---|
2379 | ATOMIC_ORDER_ACQUIRE, |
---|
2380 | ATOMIC_ORDER_ACQUIRE |
---|
2381 | ); |
---|
2382 | #else |
---|
2383 | bool success; |
---|
2384 | ISR_Level level; |
---|
2385 | |
---|
2386 | _ISR_Local_disable( level ); |
---|
2387 | |
---|
2388 | success = _Thread_Wait_flags_try_change_release( |
---|
2389 | the_thread, |
---|
2390 | expected_flags, |
---|
2391 | desired_flags |
---|
2392 | ); |
---|
2393 | |
---|
2394 | _ISR_Local_enable( level ); |
---|
2395 | return success; |
---|
2396 | #endif |
---|
2397 | } |
---|
2398 | |
---|
2399 | /** |
---|
2400 | * @brief Returns the object identifier of the object containing the current |
---|
2401 | * thread wait queue. |
---|
2402 | * |
---|
2403 | * This function may be used for debug and system information purposes. The |
---|
2404 | * caller must be the owner of the thread lock. |
---|
2405 | * |
---|
2406 | * @param the_thread The thread. |
---|
2407 | * |
---|
2408 | * @retval 0 The thread waits on no thread queue currently, the thread wait |
---|
2409 | * queue is not contained in an object, or the current thread state provides |
---|
2410 | * insufficient information, e.g. the thread is in the middle of a blocking |
---|
2411 | * operation. |
---|
2412 | * @retval other The object identifier of the object containing the thread wait |
---|
2413 | * queue. |
---|
2414 | */ |
---|
2415 | Objects_Id _Thread_Wait_get_id( const Thread_Control *the_thread ); |
---|
2416 | |
---|
2417 | /** |
---|
2418 | * @brief Get the status of the wait return code of the thread. |
---|
2419 | * |
---|
2420 | * @param the_thread The thread to get the status of the wait return code of. |
---|
2421 | */ |
---|
2422 | RTEMS_INLINE_ROUTINE Status_Control _Thread_Wait_get_status( |
---|
2423 | const Thread_Control *the_thread |
---|
2424 | ) |
---|
2425 | { |
---|
2426 | return (Status_Control) the_thread->Wait.return_code; |
---|
2427 | } |
---|
2428 | |
---|
2429 | /** |
---|
2430 | * @brief Cancels a blocking operation so that the thread can continue its |
---|
2431 | * execution. |
---|
2432 | * |
---|
2433 | * In case this function actually cancelled the blocking operation, then the |
---|
2434 | * thread wait return code is set to the specified status. |
---|
2435 | * |
---|
2436 | * A specialization of this function is _Thread_Timeout(). |
---|
2437 | * |
---|
2438 | * @param[in, out] the_thread The thread. |
---|
2439 | * @param status The thread wait status. |
---|
2440 | */ |
---|
2441 | void _Thread_Continue( Thread_Control *the_thread, Status_Control status ); |
---|
2442 | |
---|
2443 | /** |
---|
2444 | * @brief General purpose thread wait timeout. |
---|
2445 | * |
---|
2446 | * @param the_watchdog The thread timer watchdog. |
---|
2447 | */ |
---|
2448 | void _Thread_Timeout( Watchdog_Control *the_watchdog ); |
---|
2449 | |
---|
2450 | /** |
---|
2451 | * @brief Initializes the thread timer. |
---|
2452 | * |
---|
2453 | * @param [in, out] timer The timer to initialize. |
---|
2454 | * @param cpu The cpu for the operation. |
---|
2455 | */ |
---|
2456 | RTEMS_INLINE_ROUTINE void _Thread_Timer_initialize( |
---|
2457 | Thread_Timer_information *timer, |
---|
2458 | Per_CPU_Control *cpu |
---|
2459 | ) |
---|
2460 | { |
---|
2461 | _ISR_lock_Initialize( &timer->Lock, "Thread Timer" ); |
---|
2462 | timer->header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ]; |
---|
2463 | _Watchdog_Preinitialize( &timer->Watchdog, cpu ); |
---|
2464 | } |
---|
2465 | |
---|
2466 | /** |
---|
2467 | * @brief Adds timeout ticks to the thread. |
---|
2468 | * |
---|
2469 | * @param[in, out] the_thread The thread to add the timeout ticks to. |
---|
2470 | * @param cpu The cpu for the operation. |
---|
2471 | * @param ticks The ticks to add to the timeout ticks. |
---|
2472 | */ |
---|
2473 | RTEMS_INLINE_ROUTINE void _Thread_Add_timeout_ticks( |
---|
2474 | Thread_Control *the_thread, |
---|
2475 | Per_CPU_Control *cpu, |
---|
2476 | Watchdog_Interval ticks |
---|
2477 | ) |
---|
2478 | { |
---|
2479 | ISR_lock_Context lock_context; |
---|
2480 | |
---|
2481 | _ISR_lock_ISR_disable_and_acquire( &the_thread->Timer.Lock, &lock_context ); |
---|
2482 | |
---|
2483 | the_thread->Timer.header = |
---|
2484 | &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ]; |
---|
2485 | the_thread->Timer.Watchdog.routine = _Thread_Timeout; |
---|
2486 | _Watchdog_Per_CPU_insert_ticks( &the_thread->Timer.Watchdog, cpu, ticks ); |
---|
2487 | |
---|
2488 | _ISR_lock_Release_and_ISR_enable( &the_thread->Timer.Lock, &lock_context ); |
---|
2489 | } |
---|
2490 | |
---|
2491 | /** |
---|
2492 | * @brief Inserts the cpu's watchdog realtime into the thread's timer. |
---|
2493 | * |
---|
2494 | * @param[in, out] the_thread for the operation. |
---|
2495 | * @param cpu The cpu to get the watchdog header from. |
---|
2496 | * @param routine The watchdog routine for the thread. |
---|
2497 | * @param expire Expiration for the watchdog. |
---|
2498 | */ |
---|
2499 | RTEMS_INLINE_ROUTINE void _Thread_Timer_insert_realtime( |
---|
2500 | Thread_Control *the_thread, |
---|
2501 | Per_CPU_Control *cpu, |
---|
2502 | Watchdog_Service_routine_entry routine, |
---|
2503 | uint64_t expire |
---|
2504 | ) |
---|
2505 | { |
---|
2506 | ISR_lock_Context lock_context; |
---|
2507 | Watchdog_Header *header; |
---|
2508 | |
---|
2509 | _ISR_lock_ISR_disable_and_acquire( &the_thread->Timer.Lock, &lock_context ); |
---|
2510 | |
---|
2511 | header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_REALTIME ]; |
---|
2512 | the_thread->Timer.header = header; |
---|
2513 | the_thread->Timer.Watchdog.routine = routine; |
---|
2514 | _Watchdog_Per_CPU_insert( &the_thread->Timer.Watchdog, cpu, header, expire ); |
---|
2515 | |
---|
2516 | _ISR_lock_Release_and_ISR_enable( &the_thread->Timer.Lock, &lock_context ); |
---|
2517 | } |
---|
2518 | |
---|
2519 | /** |
---|
2520 | * @brief Remove the watchdog timer from the thread. |
---|
2521 | * |
---|
2522 | * @param[in, out] the_thread The thread to remove the watchdog from. |
---|
2523 | */ |
---|
2524 | RTEMS_INLINE_ROUTINE void _Thread_Timer_remove( Thread_Control *the_thread ) |
---|
2525 | { |
---|
2526 | ISR_lock_Context lock_context; |
---|
2527 | |
---|
2528 | _ISR_lock_ISR_disable_and_acquire( &the_thread->Timer.Lock, &lock_context ); |
---|
2529 | |
---|
2530 | _Watchdog_Per_CPU_remove( |
---|
2531 | &the_thread->Timer.Watchdog, |
---|
2532 | #if defined(RTEMS_SMP) |
---|
2533 | the_thread->Timer.Watchdog.cpu, |
---|
2534 | #else |
---|
2535 | _Per_CPU_Get(), |
---|
2536 | #endif |
---|
2537 | the_thread->Timer.header |
---|
2538 | ); |
---|
2539 | |
---|
2540 | _ISR_lock_Release_and_ISR_enable( &the_thread->Timer.Lock, &lock_context ); |
---|
2541 | } |
---|
2542 | |
---|
2543 | /** |
---|
2544 | * @brief Remove the watchdog timer from the thread and unblock if necessary. |
---|
2545 | * |
---|
2546 | * @param[in, out] the_thread The thread to remove the watchdog from and unblock |
---|
2547 | * if necessary. |
---|
2548 | * @param queue The thread queue. |
---|
2549 | */ |
---|
2550 | RTEMS_INLINE_ROUTINE void _Thread_Remove_timer_and_unblock( |
---|
2551 | Thread_Control *the_thread, |
---|
2552 | Thread_queue_Queue *queue |
---|
2553 | ) |
---|
2554 | { |
---|
2555 | _Thread_Wait_tranquilize( the_thread ); |
---|
2556 | _Thread_Timer_remove( the_thread ); |
---|
2557 | |
---|
2558 | #if defined(RTEMS_MULTIPROCESSING) |
---|
2559 | if ( _Objects_Is_local_id( the_thread->Object.id ) ) { |
---|
2560 | _Thread_Unblock( the_thread ); |
---|
2561 | } else { |
---|
2562 | _Thread_queue_Unblock_proxy( queue, the_thread ); |
---|
2563 | } |
---|
2564 | #else |
---|
2565 | (void) queue; |
---|
2566 | _Thread_Unblock( the_thread ); |
---|
2567 | #endif |
---|
2568 | } |
---|
2569 | |
---|
2570 | /** |
---|
2571 | * @brief Sets the name of the thread. |
---|
2572 | * |
---|
2573 | * @param[out] the_thread The thread to change the name of. |
---|
2574 | * @param name The new name for the thread. |
---|
2575 | * |
---|
2576 | * @retval STATUS_SUCCESSFUL The operation succeeded. |
---|
2577 | * @retval STATUS_RESULT_TOO_LARGE The name was too long. |
---|
2578 | */ |
---|
2579 | Status_Control _Thread_Set_name( |
---|
2580 | Thread_Control *the_thread, |
---|
2581 | const char *name |
---|
2582 | ); |
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2583 | |
---|
2584 | /** |
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2585 | * @brief Gets the name of the thread. |
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2586 | * |
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2587 | * @param the_thread The thread to get the name of. |
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2588 | * @param[out] buffer Contains the thread's name. |
---|
2589 | * @param buffer_size The size of @a buffer. |
---|
2590 | * |
---|
2591 | * @return The number of bytes copied to @a buffer. |
---|
2592 | */ |
---|
2593 | size_t _Thread_Get_name( |
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2594 | const Thread_Control *the_thread, |
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2595 | char *buffer, |
---|
2596 | size_t buffer_size |
---|
2597 | ); |
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2598 | |
---|
2599 | #if defined(RTEMS_SMP) |
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2600 | #define THREAD_PIN_STEP 2 |
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2601 | |
---|
2602 | #define THREAD_PIN_PREEMPTION 1 |
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2603 | |
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2604 | /** |
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2605 | * @brief Unpins the thread. |
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2606 | * |
---|
2607 | * @param executing The currently executing thread. |
---|
2608 | * @param cpu_self The cpu for the operation. |
---|
2609 | */ |
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2610 | void _Thread_Do_unpin( |
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2611 | Thread_Control *executing, |
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2612 | Per_CPU_Control *cpu_self |
---|
2613 | ); |
---|
2614 | #endif |
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2615 | |
---|
2616 | /** |
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2617 | * @brief Pin the executing thread. |
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2618 | * |
---|
2619 | * @param executing The currently executing thread. |
---|
2620 | */ |
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2621 | RTEMS_INLINE_ROUTINE void _Thread_Pin( Thread_Control *executing ) |
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2622 | { |
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2623 | #if defined(RTEMS_SMP) |
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2624 | _Assert( executing == _Thread_Executing ); |
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2625 | |
---|
2626 | executing->Scheduler.pin_level += THREAD_PIN_STEP; |
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2627 | #else |
---|
2628 | (void) executing; |
---|
2629 | #endif |
---|
2630 | } |
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2631 | |
---|
2632 | /** |
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2633 | * @brief Unpins the thread. |
---|
2634 | * |
---|
2635 | * @param executing The currently executing thread. |
---|
2636 | * @param cpu_self The cpu for the operation. |
---|
2637 | */ |
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2638 | RTEMS_INLINE_ROUTINE void _Thread_Unpin( |
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2639 | Thread_Control *executing, |
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2640 | Per_CPU_Control *cpu_self |
---|
2641 | ) |
---|
2642 | { |
---|
2643 | #if defined(RTEMS_SMP) |
---|
2644 | unsigned int pin_level; |
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2645 | |
---|
2646 | _Assert( executing == _Thread_Executing ); |
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2647 | |
---|
2648 | pin_level = executing->Scheduler.pin_level; |
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2649 | _Assert( pin_level > 0 ); |
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2650 | |
---|
2651 | if ( |
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2652 | RTEMS_PREDICT_TRUE( |
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2653 | pin_level != ( THREAD_PIN_STEP | THREAD_PIN_PREEMPTION ) |
---|
2654 | ) |
---|
2655 | ) { |
---|
2656 | executing->Scheduler.pin_level = pin_level - THREAD_PIN_STEP; |
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2657 | } else { |
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2658 | _Thread_Do_unpin( executing, cpu_self ); |
---|
2659 | } |
---|
2660 | #else |
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2661 | (void) executing; |
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2662 | (void) cpu_self; |
---|
2663 | #endif |
---|
2664 | } |
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2665 | |
---|
2666 | /** @}*/ |
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2667 | |
---|
2668 | #ifdef __cplusplus |
---|
2669 | } |
---|
2670 | #endif |
---|
2671 | |
---|
2672 | #if defined(RTEMS_MULTIPROCESSING) |
---|
2673 | #include <rtems/score/threadmp.h> |
---|
2674 | #endif |
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2675 | |
---|
2676 | #endif |
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2677 | /* end of include file */ |
---|