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