1 | /* |
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2 | * RTEMS Task Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * All rights assigned to U.S. Government, 1994. |
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8 | * |
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9 | * This material may be reproduced by or for the U.S. Government pursuant |
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10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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11 | * notice must appear in all copies of this file and its derivatives. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/support.h> |
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18 | #include <rtems/modes.h> |
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19 | #include <rtems/object.h> |
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20 | #include <rtems/stack.h> |
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21 | #include <rtems/states.h> |
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22 | #include <rtems/tasks.h> |
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23 | #include <rtems/thread.h> |
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24 | #include <rtems/threadq.h> |
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25 | #include <rtems/tod.h> |
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26 | #include <rtems/userext.h> |
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27 | #include <rtems/wkspace.h> |
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28 | |
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29 | /*PAGE |
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30 | * |
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31 | * _RTEMS_tasks_Manager_initialization |
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32 | * |
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33 | * This routine initializes all Task Manager related data structures. |
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34 | * |
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35 | * Input parameters: |
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36 | * maximum_tasks - number of tasks to initialize |
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37 | * |
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38 | * Output parameters: NONE |
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39 | */ |
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40 | |
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41 | void _RTEMS_tasks_Manager_initialization( |
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42 | unsigned32 maximum_tasks |
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43 | ) |
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44 | { |
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45 | _Objects_Initialize_information( |
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46 | &_RTEMS_tasks_Information, |
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47 | OBJECTS_RTEMS_TASKS, |
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48 | TRUE, |
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49 | maximum_tasks, |
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50 | sizeof( Thread_Control ), |
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51 | FALSE, |
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52 | RTEMS_MAXIMUM_NAME_LENGTH, |
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53 | TRUE |
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54 | ); |
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55 | } |
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56 | |
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57 | /*PAGE |
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58 | * |
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59 | * rtems_task_create |
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60 | * |
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61 | * This directive creates a thread by allocating and initializing a |
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62 | * thread control block and a stack. The newly created thread is |
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63 | * placed in the dormant state. |
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64 | * |
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65 | * Input parameters: |
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66 | * name - user defined thread name |
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67 | * initial_priority - thread priority |
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68 | * stack_size - stack size in bytes |
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69 | * initial_modes - initial thread mode |
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70 | * attribute_set - thread attributes |
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71 | * id - pointer to thread id |
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72 | * |
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73 | * Output parameters: |
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74 | * id - thread id |
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75 | * RTEMS_SUCCESSFUL - if successful |
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76 | * error code - if unsuccessful |
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77 | */ |
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78 | |
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79 | rtems_status_code rtems_task_create( |
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80 | rtems_name name, |
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81 | rtems_task_priority initial_priority, |
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82 | unsigned32 stack_size, |
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83 | rtems_mode initial_modes, |
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84 | rtems_attribute attribute_set, |
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85 | Objects_Id *id |
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86 | ) |
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87 | { |
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88 | register Thread_Control *the_thread; |
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89 | Objects_MP_Control *the_global_object = NULL; |
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90 | boolean is_fp; |
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91 | boolean is_global; |
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92 | rtems_attribute the_attribute_set; |
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93 | Priority_Control core_priority; |
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94 | |
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95 | |
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96 | if ( !rtems_is_name_valid( name ) ) |
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97 | return ( RTEMS_INVALID_NAME ); |
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98 | |
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99 | /* |
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100 | * Core Thread Initialize insures we get the minimum amount of |
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101 | * stack space. |
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102 | */ |
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103 | |
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104 | #if 0 |
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105 | if ( !_Stack_Is_enough( stack_size ) ) |
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106 | return( RTEMS_INVALID_SIZE ); |
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107 | #endif |
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108 | |
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109 | /* |
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110 | * Validate the RTEMS API priority and convert it to the core priority range. |
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111 | */ |
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112 | |
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113 | if ( !_Priority_Is_valid( initial_priority ) ) |
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114 | return( RTEMS_INVALID_PRIORITY ); |
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115 | |
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116 | core_priority = _RTEMS_Tasks_Priority_to_Core( initial_priority ); |
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117 | |
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118 | /* |
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119 | * Fix the attribute set to match the attributes which |
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120 | * this processor (1) requires and (2) is able to support. |
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121 | * First add in the required flags for attribute_set |
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122 | * Typically this might include FP if the platform |
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123 | * or application required all tasks to be fp aware. |
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124 | * Then turn off the requested bits which are not supported. |
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125 | */ |
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126 | |
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127 | the_attribute_set = _Attributes_Set( attribute_set, ATTRIBUTES_REQUIRED ); |
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128 | the_attribute_set = |
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129 | _Attributes_Clear( the_attribute_set, ATTRIBUTES_NOT_SUPPORTED ); |
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130 | |
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131 | if ( _Attributes_Is_floating_point( the_attribute_set ) ) |
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132 | is_fp = TRUE; |
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133 | else |
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134 | is_fp = FALSE; |
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135 | |
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136 | if ( _Attributes_Is_global( the_attribute_set ) ) { |
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137 | |
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138 | is_global = TRUE; |
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139 | |
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140 | if ( !_Configuration_Is_multiprocessing() ) |
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141 | return( RTEMS_MP_NOT_CONFIGURED ); |
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142 | |
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143 | } else |
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144 | is_global = FALSE; |
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145 | |
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146 | /* |
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147 | * Make sure system is MP if this task is global |
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148 | */ |
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149 | |
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150 | /* |
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151 | * Disable dispatch for protection |
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152 | */ |
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153 | |
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154 | _Thread_Disable_dispatch(); |
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155 | |
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156 | /* |
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157 | * Allocate the thread control block and -- if the task is global -- |
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158 | * allocate a global object control block. |
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159 | * |
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160 | * NOTE: This routine does not use the combined allocate and open |
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161 | * global object routine because this results in a lack of |
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162 | * control over when memory is allocated and can be freed in |
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163 | * the event of an error. |
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164 | */ |
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165 | |
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166 | the_thread = _RTEMS_tasks_Allocate(); |
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167 | |
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168 | if ( !the_thread ) { |
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169 | _Thread_Enable_dispatch(); |
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170 | return( RTEMS_TOO_MANY ); |
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171 | } |
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172 | |
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173 | if ( is_global ) { |
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174 | the_global_object = _Objects_MP_Allocate_global_object(); |
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175 | |
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176 | if ( _Objects_MP_Is_null_global_object( the_global_object ) ) { |
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177 | _RTEMS_tasks_Free( the_thread ); |
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178 | _Thread_Enable_dispatch(); |
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179 | return( RTEMS_TOO_MANY ); |
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180 | } |
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181 | } |
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182 | |
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183 | #if 0 |
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184 | /* |
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185 | * Allocate and initialize the RTEMS API specific information |
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186 | */ |
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187 | |
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188 | the_thread->RTEMS_API = _Workspace_Allocate( sizeof( RTEMS_API_Control ) ); |
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189 | |
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190 | if ( !the_thread->RTEMS_API ) { |
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191 | _RTEMS_tasks_Free( the_thread ); |
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192 | if ( is_global ) |
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193 | _Objects_MP_Free_global_object( the_global_object ); |
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194 | _Thread_Enable_dispatch(); |
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195 | return( RTEMS_UNSATISFIED ); |
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196 | } |
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197 | |
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198 | the_thread->RTEMS_API->pending_events = EVENT_SETS_NONE_PENDING; |
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199 | _ASR_Initialize( &the_thread->RTEMS_API->Signal ); |
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200 | #endif |
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201 | |
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202 | /* |
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203 | * Initialize the core thread for this task. |
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204 | */ |
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205 | |
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206 | /* XXX normalize mode */ |
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207 | |
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208 | if ( !_Thread_Initialize( &_RTEMS_tasks_Information, the_thread, |
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209 | NULL, stack_size, is_fp, core_priority, initial_modes, &name ) ) { |
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210 | if ( is_global ) |
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211 | _Objects_MP_Free_global_object( the_global_object ); |
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212 | _RTEMS_tasks_Free( the_thread ); |
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213 | _Thread_Enable_dispatch(); |
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214 | return( RTEMS_UNSATISFIED ); |
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215 | } |
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216 | |
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217 | *id = the_thread->Object.id; |
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218 | |
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219 | if ( is_global ) { |
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220 | |
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221 | the_thread->RTEMS_API->is_global = TRUE; |
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222 | |
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223 | _Objects_MP_Open( |
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224 | &_RTEMS_tasks_Information, |
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225 | the_global_object, |
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226 | name, |
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227 | the_thread->Object.id |
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228 | ); |
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229 | |
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230 | _RTEMS_tasks_MP_Send_process_packet( |
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231 | RTEMS_TASKS_MP_ANNOUNCE_CREATE, |
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232 | the_thread->Object.id, |
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233 | name |
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234 | ); |
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235 | |
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236 | } |
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237 | |
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238 | _Thread_Enable_dispatch(); |
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239 | return( RTEMS_SUCCESSFUL ); |
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240 | } |
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241 | |
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242 | /*PAGE |
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243 | * |
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244 | * rtems_task_ident |
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245 | * |
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246 | * This directive returns the system ID associated with |
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247 | * the thread name. |
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248 | * |
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249 | * Input parameters: |
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250 | * name - user defined thread name |
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251 | * node - node(s) to be searched |
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252 | * id - pointer to thread id |
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253 | * |
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254 | * Output parameters: |
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255 | * *id - thread id |
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256 | * RTEMS_SUCCESSFUL - if successful |
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257 | * error code - if unsuccessful |
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258 | */ |
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259 | |
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260 | rtems_status_code rtems_task_ident( |
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261 | rtems_name name, |
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262 | unsigned32 node, |
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263 | Objects_Id *id |
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264 | ) |
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265 | { |
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266 | if ( name != OBJECTS_ID_OF_SELF ) |
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267 | return( _Objects_Name_to_id( &_RTEMS_tasks_Information, &name, node, id ) ); |
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268 | |
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269 | *id = _Thread_Executing->Object.id; |
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270 | return( RTEMS_SUCCESSFUL ); |
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271 | } |
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272 | |
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273 | /*PAGE |
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274 | * |
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275 | * rtems_task_start |
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276 | * |
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277 | * This directive readies the thread identified by the "id" |
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278 | * based on its current priorty, to await execution. A thread |
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279 | * can be started only from the dormant state. |
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280 | * |
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281 | * Input parameters: |
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282 | * id - thread id |
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283 | * entry_point - start execution address of thread |
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284 | * argument - thread argument |
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285 | * |
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286 | * Output parameters: |
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287 | * RTEMS_SUCCESSFUL - if successful |
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288 | * error code - if unsuccessful |
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289 | */ |
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290 | |
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291 | rtems_status_code rtems_task_start( |
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292 | rtems_id id, |
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293 | rtems_task_entry entry_point, |
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294 | unsigned32 argument |
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295 | ) |
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296 | { |
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297 | register Thread_Control *the_thread; |
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298 | Objects_Locations location; |
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299 | |
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300 | if ( entry_point == NULL ) |
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301 | return( RTEMS_INVALID_ADDRESS ); |
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302 | |
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303 | the_thread = _Thread_Get( id, &location ); |
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304 | switch ( location ) { |
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305 | case OBJECTS_ERROR: |
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306 | return( RTEMS_INVALID_ID ); |
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307 | case OBJECTS_REMOTE: |
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308 | _Thread_Dispatch(); |
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309 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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310 | case OBJECTS_LOCAL: |
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311 | if ( _Thread_Start( |
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312 | the_thread, THREAD_START_NUMERIC, entry_point, NULL, argument ) ) { |
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313 | _Thread_Enable_dispatch(); |
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314 | return( RTEMS_SUCCESSFUL ); |
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315 | } |
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316 | _Thread_Enable_dispatch(); |
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317 | return( RTEMS_INCORRECT_STATE ); |
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318 | } |
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319 | |
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320 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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321 | } |
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322 | |
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323 | /*PAGE |
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324 | * |
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325 | * rtems_task_restart |
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326 | * |
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327 | * This directive readies the specified thread. It restores |
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328 | * the thread environment to the original values established |
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329 | * at thread creation and start time. A thread can be restarted |
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330 | * from any state except the dormant state. |
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331 | * |
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332 | * Input parameters: |
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333 | * id - thread id |
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334 | * argument - thread argument |
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335 | * |
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336 | * Output parameters: |
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337 | * RTEMS_SUCCESSFUL - if successful |
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338 | * error code - if unsuccessful |
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339 | */ |
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340 | |
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341 | rtems_status_code rtems_task_restart( |
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342 | Objects_Id id, |
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343 | unsigned32 argument |
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344 | ) |
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345 | { |
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346 | register Thread_Control *the_thread; |
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347 | Objects_Locations location; |
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348 | |
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349 | the_thread = _Thread_Get( id, &location ); |
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350 | switch ( location ) { |
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351 | case OBJECTS_ERROR: |
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352 | return( RTEMS_INVALID_ID ); |
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353 | case OBJECTS_REMOTE: |
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354 | _Thread_Dispatch(); |
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355 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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356 | case OBJECTS_LOCAL: |
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357 | if ( _Thread_Restart( the_thread, NULL, argument ) ) { |
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358 | |
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359 | /* XXX until these are in an API extension they are too late. */ |
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360 | _ASR_Initialize( &the_thread->RTEMS_API->Signal ); |
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361 | the_thread->RTEMS_API->pending_events = EVENT_SETS_NONE_PENDING; |
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362 | |
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363 | _Thread_Enable_dispatch(); |
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364 | return( RTEMS_SUCCESSFUL ); |
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365 | } |
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366 | _Thread_Enable_dispatch(); |
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367 | return( RTEMS_INCORRECT_STATE ); |
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368 | } |
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369 | |
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370 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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371 | } |
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372 | |
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373 | /*PAGE |
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374 | * |
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375 | * rtems_task_delete |
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376 | * |
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377 | * This directive allows a thread to delete itself or the thread |
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378 | * identified in the id field. The executive halts execution |
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379 | * of the thread and frees the thread control block. |
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380 | * |
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381 | * Input parameters: |
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382 | * id - thread id |
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383 | * |
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384 | * Output parameters: |
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385 | * nothing - if id is the requesting thread (always succeeds) |
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386 | * RTEMS_SUCCESSFUL - if successful and id is |
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387 | * not the requesting thread |
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388 | * error code - if unsuccessful |
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389 | */ |
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390 | |
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391 | rtems_status_code rtems_task_delete( |
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392 | Objects_Id id |
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393 | ) |
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394 | { |
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395 | register Thread_Control *the_thread; |
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396 | Objects_Locations location; |
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397 | |
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398 | the_thread = _Thread_Get( id, &location ); |
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399 | switch ( location ) { |
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400 | case OBJECTS_ERROR: |
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401 | return( RTEMS_INVALID_ID ); |
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402 | case OBJECTS_REMOTE: |
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403 | _Thread_Dispatch(); |
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404 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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405 | case OBJECTS_LOCAL: |
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406 | _Thread_Close( &_RTEMS_tasks_Information, the_thread ); |
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407 | |
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408 | /* XXX */ |
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409 | (void) _Workspace_Free( the_thread->RTEMS_API ); |
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410 | |
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411 | _RTEMS_tasks_Free( the_thread ); |
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412 | |
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413 | if ( _Attributes_Is_global( the_thread->RTEMS_API->is_global ) ) { |
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414 | |
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415 | _Objects_MP_Close( &_RTEMS_tasks_Information, the_thread->Object.id ); |
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416 | |
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417 | _RTEMS_tasks_MP_Send_process_packet( |
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418 | RTEMS_TASKS_MP_ANNOUNCE_DELETE, |
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419 | the_thread->Object.id, |
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420 | 0 /* Not used */ |
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421 | ); |
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422 | } |
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423 | |
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424 | _Thread_Enable_dispatch(); |
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425 | return( RTEMS_SUCCESSFUL ); |
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426 | } |
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427 | |
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428 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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429 | } |
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430 | |
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431 | /*PAGE |
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432 | * |
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433 | * rtems_task_suspend |
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434 | * |
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435 | * This directive will place the specified thread in the "suspended" |
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436 | * state. Note that the suspended state can be in addition to |
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437 | * other waiting states. |
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438 | * |
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439 | * Input parameters: |
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440 | * id - thread id |
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441 | * |
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442 | * Output parameters: |
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443 | * RTEMS_SUCCESSFUL - if successful |
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444 | * error code - if unsuccessful |
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445 | */ |
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446 | |
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447 | rtems_status_code rtems_task_suspend( |
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448 | Objects_Id id |
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449 | ) |
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450 | { |
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451 | register Thread_Control *the_thread; |
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452 | Objects_Locations location; |
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453 | |
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454 | the_thread = _Thread_Get( id, &location ); |
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455 | switch ( location ) { |
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456 | case OBJECTS_ERROR: |
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457 | return( RTEMS_INVALID_ID ); |
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458 | case OBJECTS_REMOTE: |
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459 | return( |
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460 | _RTEMS_tasks_MP_Send_request_packet( |
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461 | RTEMS_TASKS_MP_SUSPEND_REQUEST, |
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462 | id, |
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463 | 0, /* Not used */ |
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464 | 0, /* Not used */ |
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465 | 0 /* Not used */ |
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466 | ) |
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467 | ); |
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468 | case OBJECTS_LOCAL: |
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469 | if ( !_States_Is_suspended( the_thread->current_state ) ) { |
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470 | _Thread_Set_state( the_thread, STATES_SUSPENDED ); |
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471 | _Thread_Enable_dispatch(); |
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472 | return( RTEMS_SUCCESSFUL ); |
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473 | } |
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474 | _Thread_Enable_dispatch(); |
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475 | return( RTEMS_ALREADY_SUSPENDED ); |
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476 | } |
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477 | |
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478 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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479 | } |
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480 | |
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481 | /*PAGE |
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482 | * |
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483 | * rtems_task_resume |
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484 | * |
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485 | * This directive will remove the specified thread |
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486 | * from the suspended state. |
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487 | * |
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488 | * Input parameters: |
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489 | * id - thread id |
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490 | * |
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491 | * Output parameters: |
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492 | * RTEMS_SUCCESSFUL - if successful |
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493 | * error code - if unsuccessful |
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494 | */ |
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495 | |
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496 | rtems_status_code rtems_task_resume( |
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497 | Objects_Id id |
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498 | ) |
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499 | { |
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500 | register Thread_Control *the_thread; |
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501 | Objects_Locations location; |
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502 | |
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503 | the_thread = _Thread_Get( id, &location ); |
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504 | switch ( location ) { |
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505 | case OBJECTS_ERROR: |
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506 | return( RTEMS_INVALID_ID ); |
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507 | case OBJECTS_REMOTE: |
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508 | return( |
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509 | _RTEMS_tasks_MP_Send_request_packet( |
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510 | RTEMS_TASKS_MP_RESUME_REQUEST, |
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511 | id, |
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512 | 0, /* Not used */ |
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513 | 0, /* Not used */ |
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514 | 0 /* Not used */ |
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515 | ) |
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516 | ); |
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517 | case OBJECTS_LOCAL: |
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518 | if ( _States_Is_suspended( the_thread->current_state ) ) { |
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519 | _Thread_Resume( the_thread ); |
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520 | _Thread_Enable_dispatch(); |
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521 | return( RTEMS_SUCCESSFUL ); |
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522 | } |
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523 | _Thread_Enable_dispatch(); |
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524 | return( RTEMS_INCORRECT_STATE ); |
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525 | } |
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526 | |
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527 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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528 | } |
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529 | |
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530 | /*PAGE |
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531 | * |
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532 | * rtems_task_set_priority |
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533 | * |
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534 | * This directive changes the priority of the specified thread. |
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535 | * The specified thread can be any thread in the system including |
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536 | * the requesting thread. |
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537 | * |
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538 | * Input parameters: |
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539 | * id - thread id (0 indicates requesting thread) |
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540 | * new_priority - thread priority (0 indicates current priority) |
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541 | * old_priority - pointer to previous priority |
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542 | * |
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543 | * Output parameters: |
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544 | * old_priority - previous priority |
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545 | * RTEMS_SUCCESSFUL - if successful |
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546 | * error code - if unsuccessful |
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547 | */ |
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548 | |
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549 | rtems_status_code rtems_task_set_priority( |
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550 | Objects_Id id, |
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551 | rtems_task_priority new_priority, |
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552 | rtems_task_priority *old_priority |
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553 | ) |
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554 | { |
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555 | register Thread_Control *the_thread; |
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556 | Objects_Locations location; |
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557 | |
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558 | if ( new_priority != RTEMS_CURRENT_PRIORITY && |
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559 | !_Priority_Is_valid( new_priority ) ) |
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560 | return( RTEMS_INVALID_PRIORITY ); |
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561 | |
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562 | the_thread = _Thread_Get( id, &location ); |
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563 | switch ( location ) { |
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564 | case OBJECTS_ERROR: |
---|
565 | return( RTEMS_INVALID_ID ); |
---|
566 | case OBJECTS_REMOTE: |
---|
567 | _Thread_Executing->Wait.return_argument = old_priority; |
---|
568 | return( |
---|
569 | _RTEMS_tasks_MP_Send_request_packet( |
---|
570 | RTEMS_TASKS_MP_SET_PRIORITY_REQUEST, |
---|
571 | id, |
---|
572 | new_priority, |
---|
573 | 0, /* Not used */ |
---|
574 | 0 /* Not used */ |
---|
575 | ) |
---|
576 | ); |
---|
577 | case OBJECTS_LOCAL: |
---|
578 | *old_priority = the_thread->current_priority; |
---|
579 | if ( new_priority != RTEMS_CURRENT_PRIORITY ) { |
---|
580 | the_thread->real_priority = new_priority; |
---|
581 | if ( the_thread->resource_count == 0 || |
---|
582 | the_thread->current_priority > new_priority ) |
---|
583 | _Thread_Change_priority( the_thread, new_priority ); |
---|
584 | } |
---|
585 | _Thread_Enable_dispatch(); |
---|
586 | return( RTEMS_SUCCESSFUL ); |
---|
587 | } |
---|
588 | |
---|
589 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
---|
590 | } |
---|
591 | |
---|
592 | /*PAGE |
---|
593 | * |
---|
594 | * rtems_task_mode |
---|
595 | * |
---|
596 | * This directive enables and disables several modes of |
---|
597 | * execution for the requesting thread. |
---|
598 | * |
---|
599 | * Input parameters: |
---|
600 | * mode_set - new mode |
---|
601 | * mask - mask |
---|
602 | * previous_mode_set - address of previous mode set |
---|
603 | * |
---|
604 | * Output: |
---|
605 | * *previous_mode_set - previous mode set |
---|
606 | * always returns RTEMS_SUCCESSFUL |
---|
607 | */ |
---|
608 | |
---|
609 | rtems_status_code rtems_task_mode( |
---|
610 | rtems_mode mode_set, |
---|
611 | rtems_mode mask, |
---|
612 | rtems_mode *previous_mode_set |
---|
613 | ) |
---|
614 | { |
---|
615 | if ( _Thread_Change_mode( mode_set, mask, previous_mode_set ) ) |
---|
616 | _Thread_Dispatch(); |
---|
617 | return( RTEMS_SUCCESSFUL ); |
---|
618 | } |
---|
619 | |
---|
620 | /*PAGE |
---|
621 | * |
---|
622 | * rtems_task_get_note |
---|
623 | * |
---|
624 | * This directive obtains the note from the specified notepad |
---|
625 | * of the specified thread. |
---|
626 | * |
---|
627 | * Input parameters: |
---|
628 | * id - thread id |
---|
629 | * notepad - notepad number |
---|
630 | * note - pointer to note |
---|
631 | * |
---|
632 | * Output parameters: |
---|
633 | * note - filled in if successful |
---|
634 | * RTEMS_SUCCESSFUL - if successful |
---|
635 | * error code - if unsuccessful |
---|
636 | */ |
---|
637 | |
---|
638 | rtems_status_code rtems_task_get_note( |
---|
639 | Objects_Id id, |
---|
640 | unsigned32 notepad, |
---|
641 | unsigned32 *note |
---|
642 | ) |
---|
643 | { |
---|
644 | register Thread_Control *the_thread; |
---|
645 | Objects_Locations location; |
---|
646 | |
---|
647 | /* |
---|
648 | * NOTE: There is no check for < RTEMS_NOTEPAD_FIRST because that would |
---|
649 | * be checking an unsigned number for being negative. |
---|
650 | */ |
---|
651 | |
---|
652 | if ( notepad > RTEMS_NOTEPAD_LAST ) |
---|
653 | return( RTEMS_INVALID_NUMBER ); |
---|
654 | |
---|
655 | /* |
---|
656 | * Optimize the most likely case to avoid the Thread_Dispatch. |
---|
657 | */ |
---|
658 | |
---|
659 | if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) || |
---|
660 | _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) { |
---|
661 | *note = _Thread_Executing->RTEMS_API->Notepads[ notepad ]; |
---|
662 | return( RTEMS_SUCCESSFUL ); |
---|
663 | } |
---|
664 | |
---|
665 | the_thread = _Thread_Get( id, &location ); |
---|
666 | switch ( location ) { |
---|
667 | case OBJECTS_ERROR: |
---|
668 | return( RTEMS_INVALID_ID ); |
---|
669 | case OBJECTS_REMOTE: |
---|
670 | _Thread_Executing->Wait.return_argument = note; |
---|
671 | |
---|
672 | return _RTEMS_tasks_MP_Send_request_packet( |
---|
673 | RTEMS_TASKS_MP_GET_NOTE_REQUEST, |
---|
674 | id, |
---|
675 | 0, /* Not used */ |
---|
676 | notepad, |
---|
677 | 0 /* Not used */ |
---|
678 | ); |
---|
679 | case OBJECTS_LOCAL: |
---|
680 | *note= the_thread->RTEMS_API->Notepads[ notepad ]; |
---|
681 | _Thread_Enable_dispatch(); |
---|
682 | return( RTEMS_SUCCESSFUL ); |
---|
683 | } |
---|
684 | |
---|
685 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
---|
686 | } |
---|
687 | |
---|
688 | /*PAGE |
---|
689 | * |
---|
690 | * rtems_task_set_note |
---|
691 | * |
---|
692 | * This directive sets the specified notepad contents to the given |
---|
693 | * note. |
---|
694 | * |
---|
695 | * Input parameters: |
---|
696 | * id - thread id |
---|
697 | * notepad - notepad number |
---|
698 | * note - note value |
---|
699 | * |
---|
700 | * Output parameters: |
---|
701 | * RTEMS_SUCCESSFUL - if successful |
---|
702 | * error code - if unsuccessful |
---|
703 | */ |
---|
704 | |
---|
705 | rtems_status_code rtems_task_set_note( |
---|
706 | Objects_Id id, |
---|
707 | unsigned32 notepad, |
---|
708 | unsigned32 note |
---|
709 | ) |
---|
710 | { |
---|
711 | register Thread_Control *the_thread; |
---|
712 | Objects_Locations location; |
---|
713 | |
---|
714 | /* |
---|
715 | * NOTE: There is no check for < RTEMS_NOTEPAD_FIRST because that would |
---|
716 | * be checking an unsigned number for being negative. |
---|
717 | */ |
---|
718 | |
---|
719 | if ( notepad > RTEMS_NOTEPAD_LAST ) |
---|
720 | return( RTEMS_INVALID_NUMBER ); |
---|
721 | |
---|
722 | /* |
---|
723 | * Optimize the most likely case to avoid the Thread_Dispatch. |
---|
724 | */ |
---|
725 | |
---|
726 | if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) || |
---|
727 | _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) { |
---|
728 | _Thread_Executing->RTEMS_API->Notepads[ notepad ] = note; |
---|
729 | return( RTEMS_SUCCESSFUL ); |
---|
730 | } |
---|
731 | |
---|
732 | the_thread = _Thread_Get( id, &location ); |
---|
733 | switch ( location ) { |
---|
734 | case OBJECTS_ERROR: |
---|
735 | return( RTEMS_INVALID_ID ); |
---|
736 | case OBJECTS_REMOTE: |
---|
737 | return _RTEMS_tasks_MP_Send_request_packet( |
---|
738 | RTEMS_TASKS_MP_SET_NOTE_REQUEST, |
---|
739 | id, |
---|
740 | 0, /* Not used */ |
---|
741 | notepad, |
---|
742 | note |
---|
743 | ); |
---|
744 | |
---|
745 | case OBJECTS_LOCAL: |
---|
746 | the_thread->RTEMS_API->Notepads[ notepad ] = note; |
---|
747 | _Thread_Enable_dispatch(); |
---|
748 | return( RTEMS_SUCCESSFUL ); |
---|
749 | } |
---|
750 | |
---|
751 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
---|
752 | } |
---|
753 | |
---|
754 | /*PAGE |
---|
755 | * |
---|
756 | * rtems_task_wake_after |
---|
757 | * |
---|
758 | * This directive suspends the requesting thread for the given amount |
---|
759 | * of ticks. |
---|
760 | * |
---|
761 | * Input parameters: |
---|
762 | * ticks - number of ticks to wait |
---|
763 | * |
---|
764 | * Output parameters: |
---|
765 | * RTEMS_SUCCESSFUL - always successful |
---|
766 | */ |
---|
767 | |
---|
768 | rtems_status_code rtems_task_wake_after( |
---|
769 | rtems_interval ticks |
---|
770 | ) |
---|
771 | { |
---|
772 | if ( ticks == 0 ) { |
---|
773 | _Thread_Yield_processor(); |
---|
774 | _Thread_Dispatch(); |
---|
775 | } else { |
---|
776 | _Thread_Disable_dispatch(); |
---|
777 | _Thread_Set_state( _Thread_Executing, STATES_DELAYING ); |
---|
778 | _Watchdog_Initialize( |
---|
779 | &_Thread_Executing->Timer, |
---|
780 | _Thread_Delay_ended, |
---|
781 | _Thread_Executing->Object.id, |
---|
782 | NULL |
---|
783 | ); |
---|
784 | _Watchdog_Insert_ticks( &_Thread_Executing->Timer, |
---|
785 | ticks, WATCHDOG_ACTIVATE_NOW ); |
---|
786 | _Thread_Enable_dispatch(); |
---|
787 | } |
---|
788 | return( RTEMS_SUCCESSFUL ); |
---|
789 | } |
---|
790 | |
---|
791 | /*PAGE |
---|
792 | * |
---|
793 | * rtems_task_wake_when |
---|
794 | * |
---|
795 | * This directive blocks the requesting thread until the given date and |
---|
796 | * time is reached. |
---|
797 | * |
---|
798 | * Input parameters: |
---|
799 | * time_buffer - pointer to the time and date structure |
---|
800 | * |
---|
801 | * Output parameters: |
---|
802 | * RTEMS_SUCCESSFUL - if successful |
---|
803 | * error code - if unsuccessful |
---|
804 | */ |
---|
805 | |
---|
806 | rtems_status_code rtems_task_wake_when( |
---|
807 | rtems_time_of_day *time_buffer |
---|
808 | ) |
---|
809 | { |
---|
810 | rtems_interval seconds; |
---|
811 | rtems_status_code local_result; |
---|
812 | |
---|
813 | if ( !_TOD_Is_set() ) |
---|
814 | return( RTEMS_NOT_DEFINED ); |
---|
815 | |
---|
816 | time_buffer->ticks = 0; |
---|
817 | |
---|
818 | local_result = _TOD_Validate( time_buffer ); |
---|
819 | |
---|
820 | if ( !rtems_is_status_successful( local_result ) ) |
---|
821 | return( local_result ); |
---|
822 | |
---|
823 | seconds = _TOD_To_seconds( time_buffer ); |
---|
824 | |
---|
825 | if ( seconds <= _TOD_Seconds_since_epoch ) |
---|
826 | return( RTEMS_INVALID_CLOCK ); |
---|
827 | |
---|
828 | _Thread_Disable_dispatch(); |
---|
829 | _Thread_Set_state( _Thread_Executing, STATES_WAITING_FOR_TIME ); |
---|
830 | _Watchdog_Initialize( |
---|
831 | &_Thread_Executing->Timer, |
---|
832 | _Thread_Delay_ended, |
---|
833 | _Thread_Executing->Object.id, |
---|
834 | NULL |
---|
835 | ); |
---|
836 | _Watchdog_Insert_seconds( &_Thread_Executing->Timer, |
---|
837 | seconds - _TOD_Seconds_since_epoch, WATCHDOG_ACTIVATE_NOW ); |
---|
838 | _Thread_Enable_dispatch(); |
---|
839 | return( RTEMS_SUCCESSFUL ); |
---|
840 | } |
---|