1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Inlined Routines from the Thread Handler |
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5 | * |
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6 | * This file contains the macro implementation of the inlined |
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7 | * routines from the Thread handler. |
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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 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifndef _RTEMS_SCORE_THREADIMPL_H |
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20 | #define _RTEMS_SCORE_THREADIMPL_H |
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21 | |
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22 | #include <rtems/score/thread.h> |
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23 | #include <rtems/score/isr.h> |
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24 | #include <rtems/score/objectimpl.h> |
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25 | #include <rtems/score/statesimpl.h> |
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26 | #include <rtems/score/sysstate.h> |
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27 | #include <rtems/score/todimpl.h> |
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28 | #include <rtems/config.h> |
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29 | |
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30 | #ifdef __cplusplus |
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31 | extern "C" { |
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32 | #endif |
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33 | |
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34 | /** |
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35 | * @addtogroup ScoreThread |
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36 | */ |
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37 | /**@{**/ |
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38 | |
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39 | /** |
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40 | * The following structure contains the information necessary to manage |
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41 | * a thread which it is waiting for a resource. |
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42 | */ |
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43 | #define THREAD_STATUS_PROXY_BLOCKING 0x1111111 |
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44 | |
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45 | /** |
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46 | * Self for the GNU Ada Run-Time |
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47 | */ |
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48 | SCORE_EXTERN void *rtems_ada_self; |
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49 | |
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50 | /** |
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51 | * The following defines the information control block used to |
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52 | * manage this class of objects. |
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53 | */ |
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54 | SCORE_EXTERN Objects_Information _Thread_Internal_information; |
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55 | |
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56 | /** |
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57 | * The following context area contains the context of the "thread" |
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58 | * which invoked the start multitasking routine. This context is |
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59 | * restored as the last action of the stop multitasking routine. Thus |
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60 | * control of the processor can be returned to the environment |
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61 | * which initiated the system. |
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62 | */ |
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63 | SCORE_EXTERN Context_Control _Thread_BSP_context; |
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64 | |
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65 | /** |
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66 | * The following holds how many user extensions are in the system. This |
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67 | * is used to determine how many user extension data areas to allocate |
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68 | * per thread. |
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69 | */ |
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70 | SCORE_EXTERN uint32_t _Thread_Maximum_extensions; |
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71 | |
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72 | /** |
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73 | * The following is used to manage the length of a timeslice quantum. |
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74 | */ |
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75 | SCORE_EXTERN uint32_t _Thread_Ticks_per_timeslice; |
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76 | |
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77 | /** |
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78 | * The following points to the thread whose floating point |
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79 | * context is currently loaded. |
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80 | */ |
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81 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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82 | SCORE_EXTERN Thread_Control *_Thread_Allocated_fp; |
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83 | #endif |
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84 | |
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85 | #if !defined(__DYNAMIC_REENT__) |
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86 | /** |
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87 | * The C library re-enter-rant global pointer. Some C library implementations |
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88 | * such as newlib have a single global pointer that changed during a context |
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89 | * switch. The pointer points to that global pointer. The Thread control block |
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90 | * holds a pointer to the task specific data. |
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91 | */ |
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92 | SCORE_EXTERN struct _reent **_Thread_libc_reent; |
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93 | #endif |
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94 | |
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95 | /** |
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96 | * @brief Initialize thread handler. |
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97 | * |
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98 | * This routine performs the initialization necessary for this handler. |
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99 | */ |
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100 | void _Thread_Handler_initialization(void); |
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101 | |
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102 | /** |
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103 | * @brief Create idle thread. |
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104 | * |
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105 | * This routine creates the idle thread. |
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106 | * |
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107 | * @warning No thread should be created before this one. |
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108 | */ |
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109 | void _Thread_Create_idle(void); |
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110 | |
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111 | /** |
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112 | * @brief Start thread multitasking. |
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113 | * |
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114 | * This routine initiates multitasking. It is invoked only as |
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115 | * part of initialization and its invocation is the last act of |
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116 | * the non-multitasking part of the system initialization. |
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117 | * |
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118 | * |
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119 | * - INTERRUPT LATENCY: |
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120 | * + ready chain |
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121 | * + select heir |
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122 | */ |
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123 | void _Thread_Start_multitasking( Context_Control *context ); |
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124 | |
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125 | /** |
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126 | * @brief Allocate the requested stack space for the thread. |
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127 | * |
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128 | * Allocate the requested stack space for the thread. |
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129 | * Set the Start.stack field to the address of the stack. |
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130 | * |
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131 | * @param[in] the_thread is the thread where the stack space is requested |
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132 | * |
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133 | * @retval actual size allocated after any adjustment |
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134 | * @retval zero if the allocation failed |
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135 | */ |
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136 | size_t _Thread_Stack_Allocate( |
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137 | Thread_Control *the_thread, |
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138 | size_t stack_size |
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139 | ); |
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140 | |
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141 | /** |
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142 | * @brief Deallocate thread stack. |
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143 | * |
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144 | * Deallocate the Thread's stack. |
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145 | */ |
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146 | void _Thread_Stack_Free( |
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147 | Thread_Control *the_thread |
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148 | ); |
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149 | |
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150 | /** |
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151 | * @brief Initialize thread. |
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152 | * |
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153 | * This routine initializes the specified the thread. It allocates |
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154 | * all memory associated with this thread. It completes by adding |
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155 | * the thread to the local object table so operations on this |
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156 | * thread id are allowed. |
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157 | * |
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158 | * @note If stack_area is NULL, it is allocated from the workspace. |
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159 | * |
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160 | * @note If the stack is allocated from the workspace, then it is |
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161 | * guaranteed to be of at least minimum size. |
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162 | */ |
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163 | bool _Thread_Initialize( |
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164 | Objects_Information *information, |
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165 | Thread_Control *the_thread, |
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166 | void *stack_area, |
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167 | size_t stack_size, |
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168 | bool is_fp, |
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169 | Priority_Control priority, |
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170 | bool is_preemptible, |
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171 | Thread_CPU_budget_algorithms budget_algorithm, |
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172 | Thread_CPU_budget_algorithm_callout budget_callout, |
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173 | uint32_t isr_level, |
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174 | Objects_Name name |
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175 | ); |
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176 | |
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177 | /** |
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178 | * @brief Initializes thread and executes it. |
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179 | * |
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180 | * This routine initializes the executable information for a thread |
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181 | * and makes it ready to execute. After this routine executes, the |
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182 | * thread competes with all other threads for CPU time. |
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183 | * |
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184 | * @param the_thread is the thread to be initialized |
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185 | * @param the_prototype |
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186 | * @param entry_point |
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187 | * @param pointer_argument |
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188 | * @param numeric_argument |
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189 | * @param[in,out] processor The processor if used to start an idle thread |
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190 | * during system initialization. Must be set to @c NULL to start a normal |
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191 | * thread. |
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192 | */ |
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193 | bool _Thread_Start( |
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194 | Thread_Control *the_thread, |
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195 | Thread_Start_types the_prototype, |
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196 | void *entry_point, |
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197 | void *pointer_argument, |
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198 | Thread_Entry_numeric_type numeric_argument, |
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199 | Per_CPU_Control *processor |
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200 | ); |
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201 | |
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202 | /** |
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203 | * @brief Restarts the specified thread. |
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204 | * |
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205 | * This support routine restarts the specified task in a way that the |
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206 | * next time this thread executes, it will begin execution at its |
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207 | * original starting point. |
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208 | * |
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209 | * TODO: multiple task arg profiles |
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210 | */ |
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211 | bool _Thread_Restart( |
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212 | Thread_Control *the_thread, |
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213 | void *pointer_argument, |
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214 | Thread_Entry_numeric_type numeric_argument |
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215 | ); |
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216 | |
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217 | /** |
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218 | * @brief Resets a thread to its initial state. |
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219 | * |
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220 | * This routine resets a thread to its initial state but does |
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221 | * not restart it. Some APIs do this in separate |
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222 | * operations and this division helps support this. |
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223 | * |
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224 | * @param[in] the_thread is the thread to resets |
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225 | * @param[in] pointer_argument |
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226 | * @param[in] numeric_argument |
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227 | */ |
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228 | void _Thread_Reset( |
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229 | Thread_Control *the_thread, |
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230 | void *pointer_argument, |
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231 | Thread_Entry_numeric_type numeric_argument |
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232 | ); |
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233 | |
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234 | /** |
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235 | * @brief Frees all memory associated with the specified thread. |
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236 | * |
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237 | * This routine frees all memory associated with the specified |
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238 | * thread and removes it from the local object table so no further |
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239 | * operations on this thread are allowed. |
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240 | */ |
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241 | void _Thread_Close( |
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242 | Objects_Information *information, |
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243 | Thread_Control *the_thread |
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244 | ); |
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245 | |
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246 | /** |
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247 | * @brief Removes any set states for @a the_thread. |
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248 | * |
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249 | * This routine removes any set states for @a the_thread. It performs |
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250 | * any necessary scheduling operations including the selection of |
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251 | * a new heir thread. |
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252 | * |
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253 | * - INTERRUPT LATENCY: |
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254 | * + ready chain |
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255 | * + select heir |
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256 | */ |
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257 | void _Thread_Ready( |
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258 | Thread_Control *the_thread |
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259 | ); |
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260 | |
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261 | /** |
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262 | * @brief Clears the indicated STATES for @a the_thread. |
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263 | * |
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264 | * This routine clears the indicated STATES for @a the_thread. It performs |
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265 | * any necessary scheduling operations including the selection of |
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266 | * a new heir thread. |
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267 | * |
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268 | * - INTERRUPT LATENCY: |
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269 | * + priority map |
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270 | * + select heir |
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271 | */ |
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272 | void _Thread_Clear_state( |
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273 | Thread_Control *the_thread, |
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274 | States_Control state |
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275 | ); |
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276 | |
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277 | /** |
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278 | * @brief Sets the indicated @a state for @a the_thread. |
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279 | * |
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280 | * This routine sets the indicated @a state for @a the_thread. It performs |
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281 | * any necessary scheduling operations including the selection of |
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282 | * a new heir thread. |
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283 | * |
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284 | * @param[in] the_thread is the thread to set the state for. |
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285 | * @param[in] state is the state to set the_thread to. |
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286 | * |
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287 | * - INTERRUPT LATENCY: |
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288 | * + ready chain |
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289 | * + select map |
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290 | */ |
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291 | void _Thread_Set_state( |
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292 | Thread_Control *the_thread, |
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293 | States_Control state |
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294 | ); |
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295 | |
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296 | /** |
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297 | * @brief Sets the transient state for a thread. |
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298 | * |
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299 | * This routine sets the Transient state for @a the_thread. It performs |
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300 | * any necessary scheduling operations including the selection of |
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301 | * a new heir thread. |
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302 | * |
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303 | * @param[in] the_thread is the thread to preform the action upon. |
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304 | * |
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305 | * - INTERRUPT LATENCY: |
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306 | * + single case |
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307 | */ |
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308 | void _Thread_Set_transient( |
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309 | Thread_Control *the_thread |
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310 | ); |
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311 | |
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312 | /** |
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313 | * @brief Initializes enviroment for a thread. |
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314 | * |
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315 | * This routine initializes the context of @a the_thread to its |
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316 | * appropriate starting state. |
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317 | * |
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318 | * @param[in] the_thread is the pointer to the thread control block. |
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319 | */ |
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320 | void _Thread_Load_environment( |
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321 | Thread_Control *the_thread |
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322 | ); |
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323 | |
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324 | /** |
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325 | * @brief Wrapper function for all threads. |
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326 | * |
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327 | * This routine is the wrapper function for all threads. It is |
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328 | * the starting point for all threads. The user provided thread |
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329 | * entry point is invoked by this routine. Operations |
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330 | * which must be performed immediately before and after the user's |
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331 | * thread executes are found here. |
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332 | * |
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333 | * @note On entry, it is assumed all interrupts are blocked and that this |
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334 | * routine needs to set the initial isr level. This may or may not |
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335 | * actually be needed by the context switch routine and as a result |
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336 | * interrupts may already be at there proper level. Either way, |
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337 | * setting the initial isr level properly here is safe. |
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338 | */ |
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339 | void _Thread_Handler( void ); |
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340 | |
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341 | /** |
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342 | * @brief Ended the delay of a thread. |
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343 | * |
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344 | * This routine is invoked when a thread must be unblocked at the |
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345 | * end of a time based delay (i.e. wake after or wake when). |
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346 | * It is called by the watchdog handler. |
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347 | * |
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348 | * @param[in] id is the thread id |
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349 | */ |
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350 | void _Thread_Delay_ended( |
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351 | Objects_Id id, |
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352 | void *ignored |
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353 | ); |
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354 | |
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355 | /** |
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356 | * @brief Change the priority of a thread. |
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357 | * |
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358 | * This routine changes the current priority of @a the_thread to |
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359 | * @a new_priority. It performs any necessary scheduling operations |
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360 | * including the selection of a new heir thread. |
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361 | * |
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362 | * @param[in] the_thread is the thread to change |
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363 | * @param[in] new_priority is the priority to set @a the_thread to |
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364 | * @param[in] prepend_it is a switch to prepend the thread |
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365 | */ |
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366 | void _Thread_Change_priority ( |
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367 | Thread_Control *the_thread, |
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368 | Priority_Control new_priority, |
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369 | bool prepend_it |
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370 | ); |
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371 | |
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372 | /** |
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373 | * @brief Set thread priority. |
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374 | * |
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375 | * This routine updates the priority related fields in the_thread |
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376 | * control block to indicate the current priority is now new_priority. |
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377 | */ |
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378 | void _Thread_Set_priority( |
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379 | Thread_Control *the_thread, |
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380 | Priority_Control new_priority |
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381 | ); |
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382 | |
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383 | /** |
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384 | * This routine updates the related suspend fields in the_thread |
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385 | * control block to indicate the current nested level. |
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386 | */ |
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387 | #define _Thread_Suspend( _the_thread ) \ |
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388 | _Thread_Set_state( _the_thread, STATES_SUSPENDED ) |
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389 | |
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390 | /** |
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391 | * This routine updates the related suspend fields in the_thread |
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392 | * control block to indicate the current nested level. A force |
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393 | * parameter of true will force a resume and clear the suspend count. |
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394 | */ |
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395 | #define _Thread_Resume( _the_thread ) \ |
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396 | _Thread_Clear_state( _the_thread, STATES_SUSPENDED ) |
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397 | |
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398 | /** |
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399 | * @brief Maps thread Id to a TCB pointer. |
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400 | * |
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401 | * This function maps thread IDs to thread control |
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402 | * blocks. If ID corresponds to a local thread, then it |
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403 | * returns the_thread control pointer which maps to ID |
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404 | * and @a location is set to OBJECTS_LOCAL. If the thread ID is |
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405 | * global and resides on a remote node, then location is set |
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406 | * to OBJECTS_REMOTE, and the_thread is undefined. |
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407 | * Otherwise, location is set to OBJECTS_ERROR and |
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408 | * the_thread is undefined. |
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409 | * |
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410 | * @param[in] id is the id of the thread. |
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411 | * @param[in] location is the location of the block. |
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412 | * |
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413 | * @note The performance of many RTEMS services depends upon |
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414 | * the quick execution of the "good object" path in this |
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415 | * routine. If there is a possibility of saving a few |
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416 | * cycles off the execution time, this routine is worth |
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417 | * further optimization attention. |
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418 | */ |
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419 | Thread_Control *_Thread_Get ( |
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420 | Objects_Id id, |
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421 | Objects_Locations *location |
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422 | ); |
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423 | |
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424 | /** |
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425 | * @brief Cancel a blocking operation due to ISR. |
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426 | * |
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427 | * This method is used to cancel a blocking operation that was |
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428 | * satisfied from an ISR while the thread executing was in the |
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429 | * process of blocking. |
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430 | * |
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431 | * This method will restore the previous ISR disable level during the cancel |
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432 | * operation. Thus it is an implicit _ISR_Enable(). |
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433 | * |
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434 | * @param[in] sync_state is the synchronization state |
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435 | * @param[in] the_thread is the thread whose blocking is canceled |
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436 | * @param[in] level is the previous ISR disable level |
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437 | * |
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438 | * @note This is a rare routine in RTEMS. It is called with |
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439 | * interrupts disabled and only when an ISR completed |
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440 | * a blocking condition in process. |
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441 | */ |
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442 | void _Thread_blocking_operation_Cancel( |
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443 | Thread_blocking_operation_States sync_state, |
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444 | Thread_Control *the_thread, |
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445 | ISR_Level level |
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446 | ); |
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447 | |
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448 | /** |
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449 | * This routine halts multitasking and returns control to |
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450 | * the "thread" (i.e. the BSP) which initially invoked the |
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451 | * routine which initialized the system. |
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452 | */ |
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453 | |
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454 | RTEMS_INLINE_ROUTINE void _Thread_Stop_multitasking( void ) |
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455 | { |
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456 | #if defined(_CPU_Stop_multitasking) |
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457 | _CPU_Stop_multitasking( &_Thread_BSP_context ); |
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458 | #else |
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459 | /* |
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460 | * This may look a bit of an odd but _Context_Restart_self is just |
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461 | * a very careful restore of a specific context which ensures that |
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462 | * if we were running within the same context, it would work. |
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463 | * |
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464 | * And we will not return to this thread, so there is no point of |
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465 | * saving the context. |
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466 | */ |
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467 | _Context_Restart_self( &_Thread_BSP_context ); |
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468 | #endif |
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469 | |
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470 | /*************************************************************** |
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471 | *************************************************************** |
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472 | * SYSTEM SHUTS DOWN!!! WE DO NOT RETURN TO THIS POINT!!! * |
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473 | *************************************************************** |
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474 | *************************************************************** |
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475 | */ |
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476 | } |
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477 | |
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478 | /** |
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479 | * This function returns true if the_thread is the currently executing |
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480 | * thread, and false otherwise. |
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481 | */ |
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482 | |
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483 | RTEMS_INLINE_ROUTINE bool _Thread_Is_executing ( |
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484 | const Thread_Control *the_thread |
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485 | ) |
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486 | { |
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487 | return ( the_thread == _Thread_Executing ); |
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488 | } |
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489 | |
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490 | /** |
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491 | * This function returns true if the_thread is the heir |
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492 | * thread, and false otherwise. |
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493 | */ |
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494 | |
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495 | RTEMS_INLINE_ROUTINE bool _Thread_Is_heir ( |
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496 | const Thread_Control *the_thread |
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497 | ) |
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498 | { |
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499 | return ( the_thread == _Thread_Heir ); |
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500 | } |
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501 | |
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502 | /** |
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503 | * This routine clears any blocking state for the_thread. It performs |
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504 | * any necessary scheduling operations including the selection of |
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505 | * a new heir thread. |
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506 | */ |
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507 | |
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508 | RTEMS_INLINE_ROUTINE void _Thread_Unblock ( |
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509 | Thread_Control *the_thread |
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510 | ) |
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511 | { |
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512 | _Thread_Clear_state( the_thread, STATES_BLOCKED ); |
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513 | } |
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514 | |
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515 | /** |
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516 | * This routine resets the current context of the calling thread |
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517 | * to that of its initial state. |
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518 | */ |
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519 | |
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520 | RTEMS_INLINE_ROUTINE void _Thread_Restart_self( void ) |
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521 | { |
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522 | #if defined(RTEMS_SMP) |
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523 | ISR_Level level; |
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524 | |
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525 | _Per_CPU_ISR_disable_and_acquire( _Per_CPU_Get(), level ); |
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526 | ( void ) level; |
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527 | #endif |
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528 | |
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529 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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530 | if ( _Thread_Executing->fp_context != NULL ) |
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531 | _Context_Restore_fp( &_Thread_Executing->fp_context ); |
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532 | #endif |
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533 | |
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534 | _CPU_Context_Restart_self( &_Thread_Executing->Registers ); |
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535 | } |
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536 | |
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537 | /** |
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538 | * This function returns true if the floating point context of |
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539 | * the_thread is currently loaded in the floating point unit, and |
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540 | * false otherwise. |
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541 | */ |
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542 | |
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543 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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544 | RTEMS_INLINE_ROUTINE bool _Thread_Is_allocated_fp ( |
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545 | const Thread_Control *the_thread |
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546 | ) |
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547 | { |
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548 | return ( the_thread == _Thread_Allocated_fp ); |
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549 | } |
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550 | #endif |
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551 | |
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552 | /** |
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553 | * This routine is invoked when the currently loaded floating |
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554 | * point context is now longer associated with an active thread. |
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555 | */ |
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556 | |
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557 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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558 | RTEMS_INLINE_ROUTINE void _Thread_Deallocate_fp( void ) |
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559 | { |
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560 | _Thread_Allocated_fp = NULL; |
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561 | } |
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562 | #endif |
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563 | |
---|
564 | /** |
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565 | * This function returns true if dispatching is disabled, and false |
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566 | * otherwise. |
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567 | */ |
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568 | |
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569 | RTEMS_INLINE_ROUTINE bool _Thread_Is_context_switch_necessary( void ) |
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570 | { |
---|
571 | return ( _Thread_Dispatch_necessary ); |
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572 | } |
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573 | |
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574 | /** |
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575 | * This function returns true if the_thread is NULL and false otherwise. |
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576 | */ |
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577 | |
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578 | RTEMS_INLINE_ROUTINE bool _Thread_Is_null ( |
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579 | const Thread_Control *the_thread |
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580 | ) |
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581 | { |
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582 | return ( the_thread == NULL ); |
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583 | } |
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584 | |
---|
585 | /** |
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586 | * @brief Is proxy blocking. |
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587 | * |
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588 | * status which indicates that a proxy is blocking, and false otherwise. |
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589 | */ |
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590 | RTEMS_INLINE_ROUTINE bool _Thread_Is_proxy_blocking ( |
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591 | uint32_t code |
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592 | ) |
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593 | { |
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594 | return (code == THREAD_STATUS_PROXY_BLOCKING); |
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595 | } |
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596 | |
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597 | RTEMS_INLINE_ROUTINE uint32_t _Thread_Get_maximum_internal_threads(void) |
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598 | { |
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599 | uint32_t maximum_internal_threads = 0; |
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600 | |
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601 | /* Idle threads */ |
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602 | maximum_internal_threads += rtems_configuration_get_maximum_processors(); |
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603 | |
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604 | /* MPCI thread */ |
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605 | #if defined(RTEMS_MULTIPROCESSING) |
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606 | if ( _System_state_Is_multiprocessing ) { |
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607 | ++maximum_internal_threads; |
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608 | } |
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609 | #endif |
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610 | |
---|
611 | return maximum_internal_threads; |
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612 | } |
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613 | |
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614 | /** |
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615 | * This routine allocates an internal thread. |
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616 | */ |
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617 | |
---|
618 | RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Internal_allocate( void ) |
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619 | { |
---|
620 | return (Thread_Control *) _Objects_Allocate( &_Thread_Internal_information ); |
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621 | } |
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622 | |
---|
623 | /** |
---|
624 | * This routine frees an internal thread. |
---|
625 | */ |
---|
626 | |
---|
627 | RTEMS_INLINE_ROUTINE void _Thread_Internal_free ( |
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628 | Thread_Control *the_task |
---|
629 | ) |
---|
630 | { |
---|
631 | _Objects_Free( &_Thread_Internal_information, &the_task->Object ); |
---|
632 | } |
---|
633 | |
---|
634 | RTEMS_INLINE_ROUTINE void _Thread_Set_global_exit_status( |
---|
635 | uint32_t exit_status |
---|
636 | ) |
---|
637 | { |
---|
638 | Thread_Control *idle = (Thread_Control *) |
---|
639 | _Thread_Internal_information.local_table[ 1 ]; |
---|
640 | |
---|
641 | idle->Wait.return_code = exit_status; |
---|
642 | } |
---|
643 | |
---|
644 | RTEMS_INLINE_ROUTINE uint32_t _Thread_Get_global_exit_status( void ) |
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645 | { |
---|
646 | const Thread_Control *idle = (const Thread_Control *) |
---|
647 | _Thread_Internal_information.local_table[ 1 ]; |
---|
648 | |
---|
649 | return idle->Wait.return_code; |
---|
650 | } |
---|
651 | |
---|
652 | RTEMS_INLINE_ROUTINE void _Thread_Signal_notification( Thread_Control *thread ) |
---|
653 | { |
---|
654 | if ( _ISR_Is_in_progress() && _Thread_Is_executing( thread ) ) { |
---|
655 | _Thread_Dispatch_necessary = true; |
---|
656 | } else { |
---|
657 | #if defined(RTEMS_SMP) |
---|
658 | if ( thread->is_executing ) { |
---|
659 | const Per_CPU_Control *cpu_of_executing = _Per_CPU_Get(); |
---|
660 | Per_CPU_Control *cpu_of_thread = thread->cpu; |
---|
661 | |
---|
662 | if ( cpu_of_executing != cpu_of_thread ) { |
---|
663 | cpu_of_thread->dispatch_necessary = true; |
---|
664 | _Per_CPU_Send_interrupt( cpu_of_thread ); |
---|
665 | } |
---|
666 | } |
---|
667 | #endif |
---|
668 | } |
---|
669 | } |
---|
670 | |
---|
671 | RTEMS_INLINE_ROUTINE void _Thread_Update_cpu_time_used( |
---|
672 | Thread_Control *executing, |
---|
673 | Timestamp_Control *time_of_last_context_switch |
---|
674 | ) |
---|
675 | { |
---|
676 | Timestamp_Control uptime; |
---|
677 | Timestamp_Control ran; |
---|
678 | |
---|
679 | _TOD_Get_uptime( &uptime ); |
---|
680 | _Timestamp_Subtract( |
---|
681 | time_of_last_context_switch, |
---|
682 | &uptime, |
---|
683 | &ran |
---|
684 | ); |
---|
685 | *time_of_last_context_switch = uptime; |
---|
686 | _Timestamp_Add_to( &executing->cpu_time_used, &ran ); |
---|
687 | } |
---|
688 | |
---|
689 | #if !defined(__DYNAMIC_REENT__) |
---|
690 | /** |
---|
691 | * This routine returns the C library re-enterant pointer. |
---|
692 | */ |
---|
693 | |
---|
694 | RTEMS_INLINE_ROUTINE struct _reent **_Thread_Get_libc_reent( void ) |
---|
695 | { |
---|
696 | return _Thread_libc_reent; |
---|
697 | } |
---|
698 | |
---|
699 | /** |
---|
700 | * This routine set the C library re-enterant pointer. |
---|
701 | */ |
---|
702 | |
---|
703 | RTEMS_INLINE_ROUTINE void _Thread_Set_libc_reent ( |
---|
704 | struct _reent **libc_reent |
---|
705 | ) |
---|
706 | { |
---|
707 | _Thread_libc_reent = libc_reent; |
---|
708 | } |
---|
709 | #endif |
---|
710 | |
---|
711 | /** @}*/ |
---|
712 | |
---|
713 | #ifdef __cplusplus |
---|
714 | } |
---|
715 | #endif |
---|
716 | |
---|
717 | #if defined(RTEMS_MULTIPROCESSING) |
---|
718 | #include <rtems/score/threadmp.h> |
---|
719 | #endif |
---|
720 | |
---|
721 | #endif |
---|
722 | /* end of include file */ |
---|