1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #include <assert.h> |
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6 | #include <errno.h> |
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7 | #include <pthread.h> |
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8 | #include <limits.h> |
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9 | |
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10 | #include <rtems/system.h> |
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11 | #include <rtems/score/apiext.h> |
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12 | #include <rtems/score/stack.h> |
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13 | #include <rtems/score/thread.h> |
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14 | #include <rtems/score/userext.h> |
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15 | #include <rtems/score/wkspace.h> |
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16 | #include <rtems/posix/pthread.h> |
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17 | #include <rtems/posix/priority.h> |
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18 | #include <rtems/posix/psignal.h> |
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19 | #include <rtems/posix/config.h> |
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20 | #include <rtems/posix/key.h> |
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21 | #include <rtems/posix/time.h> |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * The default pthreads attributes structure. |
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26 | */ |
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27 | |
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28 | const pthread_attr_t _POSIX_Threads_Default_attributes = { |
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29 | TRUE, /* is_initialized */ |
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30 | NULL, /* stackaddr */ |
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31 | STACK_MINIMUM_SIZE, /* stacksize */ |
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32 | PTHREAD_SCOPE_PROCESS, /* contentionscope */ |
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33 | PTHREAD_EXPLICIT_SCHED, /* inheritsched */ |
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34 | SCHED_FIFO, /* schedpolicy */ |
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35 | { /* schedparam */ |
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36 | 128, /* sched_priority */ |
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37 | 0, /* ss_low_priority */ |
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38 | { 0L, 0 }, /* ss_replenish_period */ |
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39 | { 0L, 0 } /* ss_initial_budget */ |
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40 | }, |
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41 | PTHREAD_CREATE_JOINABLE, /* detachstate */ |
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42 | 1 /* cputime_clock_allowed */ |
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43 | }; |
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44 | |
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45 | /*PAGE |
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46 | * |
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47 | * _POSIX_Threads_Sporadic_budget_TSR |
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48 | */ |
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49 | |
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50 | void _POSIX_Threads_Sporadic_budget_TSR( |
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51 | Objects_Id id, |
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52 | void *argument |
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53 | ) |
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54 | { |
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55 | Thread_Control *the_thread; |
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56 | POSIX_API_Control *api; |
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57 | |
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58 | the_thread = argument; |
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59 | |
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60 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
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61 | |
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62 | the_thread->cpu_time_budget = |
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63 | _POSIX_Timespec_to_interval( &api->schedparam.ss_initial_budget ); |
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64 | |
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65 | _Thread_Change_priority( |
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66 | the_thread, |
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67 | _POSIX_Priority_To_core( api->schedparam.sched_priority ) |
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68 | ); |
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69 | |
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70 | _Watchdog_Insert_ticks( |
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71 | &api->Sporadic_timer, |
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72 | _POSIX_Timespec_to_interval( &api->schedparam.ss_replenish_period ) |
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73 | ); |
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74 | } |
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75 | |
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76 | /*PAGE |
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77 | * |
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78 | * _POSIX_Threads_Sporadic_budget_callout |
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79 | */ |
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80 | |
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81 | void _POSIX_Threads_Sporadic_budget_callout( |
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82 | Thread_Control *the_thread |
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83 | ) |
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84 | { |
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85 | POSIX_API_Control *api; |
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86 | |
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87 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
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88 | |
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89 | /* XXX really should be based on MAX_U32 */ |
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90 | |
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91 | the_thread->cpu_time_budget = 0xFFFFFFFF; |
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92 | |
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93 | _Thread_Change_priority( |
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94 | the_thread, |
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95 | _POSIX_Priority_To_core( api->schedparam.ss_low_priority ) |
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96 | ); |
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97 | } |
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98 | |
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99 | /*PAGE |
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100 | * |
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101 | * _POSIX_Threads_Create_extension |
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102 | * |
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103 | * XXX |
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104 | */ |
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105 | |
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106 | boolean _POSIX_Threads_Create_extension( |
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107 | Thread_Control *executing, |
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108 | Thread_Control *created |
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109 | ) |
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110 | { |
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111 | POSIX_API_Control *api; |
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112 | |
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113 | api = _Workspace_Allocate( sizeof( POSIX_API_Control ) ); |
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114 | |
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115 | if ( !api ) |
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116 | return FALSE; |
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117 | |
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118 | created->API_Extensions[ THREAD_API_POSIX ] = api; |
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119 | |
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120 | api->Attributes = _POSIX_Threads_Default_attributes; |
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121 | api->detachstate = _POSIX_Threads_Default_attributes.detachstate; |
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122 | api->schedpolicy = _POSIX_Threads_Default_attributes.schedpolicy; |
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123 | api->schedparam = _POSIX_Threads_Default_attributes.schedparam; |
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124 | api->schedparam.sched_priority = |
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125 | _POSIX_Priority_From_core( created->current_priority ); |
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126 | |
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127 | /* XXX set signal parameters -- block all signals for non-posix threads */ |
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128 | |
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129 | _Thread_queue_Initialize( |
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130 | &api->Join_List, |
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131 | OBJECTS_NO_CLASS, /* only used for proxy operations */ |
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132 | THREAD_QUEUE_DISCIPLINE_FIFO, |
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133 | STATES_WAITING_FOR_JOIN_AT_EXIT, |
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134 | NULL, /* no extract proxy handler */ |
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135 | 0 |
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136 | ); |
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137 | |
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138 | _Watchdog_Initialize( |
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139 | &api->Sporadic_timer, |
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140 | _POSIX_Threads_Sporadic_budget_TSR, |
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141 | created->Object.id, |
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142 | created |
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143 | ); |
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144 | |
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145 | return TRUE; |
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146 | } |
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147 | |
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148 | /*PAGE |
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149 | * |
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150 | * _POSIX_Threads_Delete_extension |
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151 | */ |
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152 | |
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153 | User_extensions_routine _POSIX_Threads_Delete_extension( |
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154 | Thread_Control *executing, |
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155 | Thread_Control *deleted |
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156 | ) |
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157 | { |
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158 | Thread_Control *the_thread; |
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159 | POSIX_API_Control *api; |
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160 | void **value_ptr; |
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161 | |
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162 | (void) _Workspace_Free( deleted->API_Extensions[ THREAD_API_POSIX ] ); |
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163 | |
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164 | deleted->API_Extensions[ THREAD_API_POSIX ] = NULL; |
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165 | |
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166 | /* XXX run cancellation handlers */ |
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167 | |
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168 | _POSIX_Keys_Run_destructors( deleted ); |
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169 | |
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170 | /* |
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171 | * Wakeup all the tasks which joined with this one |
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172 | */ |
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173 | |
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174 | api = deleted->API_Extensions[ THREAD_API_POSIX ]; |
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175 | |
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176 | value_ptr = (void **) deleted->Wait.return_argument; |
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177 | |
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178 | while ( (the_thread = _Thread_queue_Dequeue( &api->Join_List )) ) |
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179 | *(void **)the_thread->Wait.return_argument = value_ptr; |
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180 | |
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181 | if ( api->schedpolicy == SCHED_SPORADIC ) |
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182 | (void) _Watchdog_Remove( &api->Sporadic_timer ); |
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183 | } |
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184 | |
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185 | /*PAGE |
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186 | * |
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187 | * _POSIX_Threads_Initialize_user_threads |
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188 | * |
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189 | * This routine creates and starts all configured user |
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190 | * initialzation threads. |
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191 | * |
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192 | * Input parameters: NONE |
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193 | * |
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194 | * Output parameters: NONE |
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195 | */ |
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196 | |
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197 | void _POSIX_Threads_Initialize_user_threads( void ) |
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198 | { |
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199 | int status; |
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200 | unsigned32 index; |
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201 | unsigned32 maximum; |
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202 | posix_initialization_threads_table *user_threads; |
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203 | pthread_t thread_id; |
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204 | |
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205 | user_threads = _POSIX_Threads_User_initialization_threads; |
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206 | maximum = _POSIX_Threads_Number_of_initialization_threads; |
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207 | |
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208 | if ( !user_threads || maximum == 0 ) |
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209 | return; |
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210 | |
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211 | for ( index=0 ; index < maximum ; index++ ) { |
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212 | status = pthread_create( |
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213 | &thread_id, |
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214 | NULL, |
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215 | user_threads[ index ].entry, |
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216 | NULL |
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217 | ); |
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218 | assert( !status ); |
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219 | } |
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220 | } |
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221 | |
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222 | API_extensions_Control _POSIX_Threads_API_extensions = { |
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223 | { NULL, NULL }, |
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224 | NULL, /* predriver */ |
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225 | _POSIX_Threads_Initialize_user_threads, /* postdriver */ |
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226 | _POSIX_signals_Post_switch_extension, /* post switch */ |
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227 | }; |
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228 | |
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229 | User_extensions_Control _POSIX_Threads_User_extensions = { |
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230 | { NULL, NULL }, |
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231 | { _POSIX_Threads_Create_extension, /* create */ |
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232 | NULL, /* start */ |
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233 | NULL, /* restart */ |
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234 | _POSIX_Threads_Delete_extension, /* delete */ |
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235 | NULL, /* switch */ |
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236 | NULL, /* begin */ |
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237 | NULL, /* exitted */ |
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238 | NULL /* fatal */ |
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239 | } |
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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 | * _POSIX_Threads_Manager_initialization |
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245 | * |
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246 | * This routine initializes all threads manager related data structures. |
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247 | * |
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248 | * Input parameters: |
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249 | * maximum_pthreads - maximum configured pthreads |
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250 | * |
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251 | * Output parameters: NONE |
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252 | */ |
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253 | |
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254 | void _POSIX_Threads_Manager_initialization( |
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255 | unsigned32 maximum_pthreads, |
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256 | unsigned32 number_of_initialization_threads, |
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257 | posix_initialization_threads_table *user_threads |
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258 | |
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259 | ) |
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260 | { |
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261 | _POSIX_Threads_Number_of_initialization_threads = |
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262 | number_of_initialization_threads; |
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263 | _POSIX_Threads_User_initialization_threads = user_threads; |
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264 | |
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265 | /* |
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266 | * There may not be any POSIX initialization threads configured. |
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267 | */ |
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268 | |
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269 | #if 0 |
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270 | if ( user_threads == NULL || number_of_initialization_threads == 0 ) |
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271 | _Internal_error_Occurred( INTERNAL_ERROR_POSIX_API, TRUE, EINVAL ); |
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272 | #endif |
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273 | |
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274 | _Objects_Initialize_information( |
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275 | &_POSIX_Threads_Information, |
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276 | OBJECTS_POSIX_THREADS, |
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277 | FALSE, /* does not support global */ |
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278 | maximum_pthreads, |
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279 | sizeof( Thread_Control ), |
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280 | TRUE, |
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281 | 5, /* length is arbitrary for now */ |
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282 | TRUE /* this class is threads */ |
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283 | ); |
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284 | |
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285 | /* |
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286 | * Add all the extensions for this API |
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287 | */ |
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288 | |
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289 | _User_extensions_Add_API_set( &_POSIX_Threads_User_extensions ); |
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290 | |
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291 | _API_extensions_Add( &_POSIX_Threads_API_extensions ); |
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292 | |
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293 | /* |
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294 | * If we supported MP, then here we would ... |
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295 | * Register the MP Process Packet routine. |
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296 | */ |
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297 | |
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298 | } |
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299 | |
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300 | /*PAGE |
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301 | * |
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302 | * 3.1.3 Register Fork Handlers, P1003.1c/Draft 10, P1003.1c/Draft 10, p. 27 |
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303 | * |
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304 | * RTEMS does not support processes, so we fall under this and do not |
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305 | * provide this routine: |
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306 | * |
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307 | * "Either the implementation shall support the pthread_atfork() function |
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308 | * as described above or the pthread_atfork() funciton shall not be |
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309 | * provided." |
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310 | */ |
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311 | |
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312 | /*PAGE |
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313 | * |
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314 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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315 | */ |
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316 | |
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317 | int pthread_attr_setscope( |
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318 | pthread_attr_t *attr, |
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319 | int contentionscope |
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320 | ) |
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321 | { |
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322 | if ( !attr || !attr->is_initialized ) |
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323 | return EINVAL; |
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324 | |
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325 | switch ( contentionscope ) { |
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326 | case PTHREAD_SCOPE_PROCESS: |
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327 | attr->contentionscope = contentionscope; |
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328 | return 0; |
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329 | |
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330 | case PTHREAD_SCOPE_SYSTEM: |
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331 | return ENOSYS; |
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332 | |
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333 | default: |
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334 | return EINVAL; |
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335 | } |
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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 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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341 | */ |
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342 | |
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343 | int pthread_attr_getscope( |
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344 | const pthread_attr_t *attr, |
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345 | int *contentionscope |
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346 | ) |
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347 | { |
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348 | if ( !attr || !attr->is_initialized ) |
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349 | return EINVAL; |
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350 | |
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351 | *contentionscope = attr->contentionscope; |
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352 | return 0; |
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353 | } |
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354 | |
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355 | /*PAGE |
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356 | * |
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357 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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358 | */ |
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359 | |
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360 | int pthread_attr_setinheritsched( |
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361 | pthread_attr_t *attr, |
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362 | int inheritsched |
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363 | ) |
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364 | { |
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365 | if ( !attr || !attr->is_initialized ) |
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366 | return EINVAL; |
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367 | |
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368 | switch ( inheritsched ) { |
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369 | case PTHREAD_INHERIT_SCHED: |
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370 | case PTHREAD_EXPLICIT_SCHED: |
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371 | attr->inheritsched = inheritsched; |
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372 | return 0; |
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373 | |
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374 | default: |
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375 | return EINVAL; |
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376 | } |
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377 | } |
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378 | |
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379 | /*PAGE |
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380 | * |
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381 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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382 | */ |
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383 | |
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384 | int pthread_attr_getinheritsched( |
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385 | const pthread_attr_t *attr, |
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386 | int *inheritsched |
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387 | ) |
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388 | { |
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389 | if ( !attr || !attr->is_initialized ) |
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390 | return EINVAL; |
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391 | |
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392 | *inheritsched = attr->inheritsched; |
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393 | return 0; |
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394 | } |
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395 | |
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396 | /*PAGE |
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397 | * |
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398 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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399 | */ |
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400 | |
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401 | int pthread_attr_setschedpolicy( |
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402 | pthread_attr_t *attr, |
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403 | int policy |
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404 | ) |
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405 | { |
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406 | if ( !attr || !attr->is_initialized ) |
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407 | return EINVAL; |
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408 | |
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409 | switch ( policy ) { |
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410 | case SCHED_OTHER: |
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411 | case SCHED_FIFO: |
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412 | case SCHED_RR: |
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413 | case SCHED_SPORADIC: |
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414 | attr->schedpolicy = policy; |
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415 | return 0; |
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416 | |
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417 | default: |
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418 | return EINVAL; |
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419 | } |
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420 | } |
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421 | |
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422 | /*PAGE |
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423 | * |
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424 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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425 | */ |
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426 | |
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427 | int pthread_attr_getschedpolicy( |
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428 | const pthread_attr_t *attr, |
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429 | int *policy |
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430 | ) |
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431 | { |
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432 | if ( !attr || !attr->is_initialized ) |
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433 | return EINVAL; |
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434 | |
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435 | *policy = attr->schedpolicy; |
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436 | return 0; |
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437 | } |
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438 | |
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439 | /*PAGE |
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440 | * |
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441 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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442 | */ |
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443 | |
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444 | int pthread_attr_setschedparam( |
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445 | pthread_attr_t *attr, |
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446 | const struct sched_param *param |
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447 | ) |
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448 | { |
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449 | if ( !attr || !attr->is_initialized ) |
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450 | return EINVAL; |
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451 | |
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452 | attr->schedparam = *param; |
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453 | return 0; |
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454 | } |
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455 | |
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456 | /*PAGE |
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457 | * |
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458 | * 13.5.1 Thread Creation Scheduling Attributes, P1003.1c/Draft 10, p. 120 |
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459 | */ |
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460 | |
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461 | int pthread_attr_getschedparam( |
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462 | const pthread_attr_t *attr, |
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463 | struct sched_param *param |
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464 | ) |
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465 | { |
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466 | if ( !attr || !attr->is_initialized ) |
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467 | return EINVAL; |
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468 | |
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469 | *param = attr->schedparam; |
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470 | return 0; |
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471 | } |
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472 | |
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473 | /*PAGE |
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474 | * |
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475 | * 13.5.2 Dynamic Thread Scheduling Parameters Access, |
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476 | * P1003.1c/Draft 10, p. 124 |
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477 | */ |
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478 | |
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479 | int pthread_getschedparam( |
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480 | pthread_t thread, |
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481 | int *policy, |
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482 | struct sched_param *param |
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483 | ) |
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484 | { |
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485 | Objects_Locations location; |
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486 | POSIX_API_Control *api; |
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487 | register Thread_Control *the_thread; |
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488 | |
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489 | if ( !policy || !param ) |
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490 | return EINVAL; |
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491 | |
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492 | the_thread = _POSIX_Threads_Get( thread, &location ); |
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493 | switch ( location ) { |
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494 | case OBJECTS_ERROR: |
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495 | case OBJECTS_REMOTE: |
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496 | return ESRCH; |
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497 | case OBJECTS_LOCAL: |
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498 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
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499 | *policy = api->schedpolicy; |
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500 | *param = api->schedparam; |
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501 | _Thread_Enable_dispatch(); |
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502 | return 0; |
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503 | } |
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504 | |
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505 | return POSIX_BOTTOM_REACHED(); |
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506 | |
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507 | } |
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508 | |
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509 | /*PAGE |
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510 | * |
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511 | * 13.5.2 Dynamic Thread Scheduling Parameters Access, |
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512 | * P1003.1c/Draft 10, p. 124 |
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513 | */ |
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514 | |
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515 | int pthread_setschedparam( |
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516 | pthread_t thread, |
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517 | int policy, |
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518 | struct sched_param *param |
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519 | ) |
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520 | { |
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521 | register Thread_Control *the_thread; |
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522 | POSIX_API_Control *api; |
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523 | Thread_CPU_budget_algorithms budget_algorithm; |
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524 | Thread_CPU_budget_algorithm_callout budget_callout; |
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525 | Objects_Locations location; |
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526 | |
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527 | /* |
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528 | * Check all the parameters |
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529 | */ |
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530 | |
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531 | if ( !param ) |
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532 | return EINVAL; |
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533 | |
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534 | if ( !_POSIX_Priority_Is_valid( param->sched_priority ) ) |
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535 | return EINVAL; |
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536 | |
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537 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
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538 | budget_callout = NULL; |
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539 | |
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540 | switch ( policy ) { |
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541 | case SCHED_OTHER: |
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542 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE; |
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543 | break; |
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544 | |
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545 | case SCHED_FIFO: |
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546 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
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547 | break; |
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548 | |
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549 | case SCHED_RR: |
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550 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE; |
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551 | break; |
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552 | |
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553 | case SCHED_SPORADIC: |
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554 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT; |
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555 | budget_callout = _POSIX_Threads_Sporadic_budget_callout; |
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556 | |
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557 | if ( _POSIX_Timespec_to_interval( ¶m->ss_replenish_period ) < |
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558 | _POSIX_Timespec_to_interval( ¶m->ss_initial_budget ) ) |
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559 | return EINVAL; |
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560 | |
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561 | if ( !_POSIX_Priority_Is_valid( param->ss_low_priority ) ) |
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562 | return EINVAL; |
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563 | |
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564 | break; |
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565 | |
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566 | default: |
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567 | return EINVAL; |
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568 | } |
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569 | |
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570 | /* |
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571 | * Actually change the scheduling policy and parameters |
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572 | */ |
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573 | |
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574 | the_thread = _POSIX_Threads_Get( thread, &location ); |
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575 | switch ( location ) { |
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576 | case OBJECTS_ERROR: |
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577 | case OBJECTS_REMOTE: |
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578 | return ESRCH; |
---|
579 | case OBJECTS_LOCAL: |
---|
580 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
581 | |
---|
582 | if ( api->schedpolicy == SCHED_SPORADIC ) |
---|
583 | (void) _Watchdog_Remove( &api->Sporadic_timer ); |
---|
584 | |
---|
585 | api->schedpolicy = policy; |
---|
586 | api->schedparam = *param; |
---|
587 | the_thread->budget_algorithm = budget_algorithm; |
---|
588 | the_thread->budget_callout = budget_callout; |
---|
589 | |
---|
590 | switch ( api->schedpolicy ) { |
---|
591 | case SCHED_OTHER: |
---|
592 | case SCHED_FIFO: |
---|
593 | case SCHED_RR: |
---|
594 | the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice; |
---|
595 | |
---|
596 | _Thread_Change_priority( |
---|
597 | the_thread, |
---|
598 | _POSIX_Priority_To_core( api->schedparam.sched_priority ) |
---|
599 | ); |
---|
600 | break; |
---|
601 | |
---|
602 | case SCHED_SPORADIC: |
---|
603 | _POSIX_Threads_Sporadic_budget_TSR( 0, the_thread ); |
---|
604 | break; |
---|
605 | } |
---|
606 | |
---|
607 | _Thread_Enable_dispatch(); |
---|
608 | return 0; |
---|
609 | } |
---|
610 | return POSIX_BOTTOM_REACHED(); |
---|
611 | } |
---|
612 | |
---|
613 | /*PAGE |
---|
614 | * |
---|
615 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
616 | */ |
---|
617 | |
---|
618 | int pthread_attr_init( |
---|
619 | pthread_attr_t *attr |
---|
620 | ) |
---|
621 | { |
---|
622 | if ( !attr ) |
---|
623 | return EINVAL; |
---|
624 | |
---|
625 | *attr = _POSIX_Threads_Default_attributes; |
---|
626 | return 0; |
---|
627 | } |
---|
628 | |
---|
629 | /*PAGE |
---|
630 | * |
---|
631 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
632 | */ |
---|
633 | |
---|
634 | int pthread_attr_destroy( |
---|
635 | pthread_attr_t *attr |
---|
636 | ) |
---|
637 | { |
---|
638 | if ( !attr || !attr->is_initialized ) |
---|
639 | return EINVAL; |
---|
640 | |
---|
641 | attr->is_initialized = FALSE; |
---|
642 | return 0; |
---|
643 | } |
---|
644 | |
---|
645 | /*PAGE |
---|
646 | * |
---|
647 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
648 | */ |
---|
649 | |
---|
650 | int pthread_attr_getstacksize( |
---|
651 | const pthread_attr_t *attr, |
---|
652 | size_t *stacksize |
---|
653 | ) |
---|
654 | { |
---|
655 | if ( !attr || !attr->is_initialized ) |
---|
656 | return EINVAL; |
---|
657 | |
---|
658 | *stacksize = attr->stacksize; |
---|
659 | return 0; |
---|
660 | } |
---|
661 | |
---|
662 | /*PAGE |
---|
663 | * |
---|
664 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
665 | */ |
---|
666 | |
---|
667 | int pthread_attr_setstacksize( |
---|
668 | pthread_attr_t *attr, |
---|
669 | size_t stacksize |
---|
670 | ) |
---|
671 | { |
---|
672 | if ( !attr || !attr->is_initialized ) |
---|
673 | return EINVAL; |
---|
674 | |
---|
675 | if (stacksize < STACK_MINIMUM_SIZE) |
---|
676 | attr->stacksize = STACK_MINIMUM_SIZE; |
---|
677 | else |
---|
678 | attr->stacksize = stacksize; |
---|
679 | return 0; |
---|
680 | } |
---|
681 | |
---|
682 | /*PAGE |
---|
683 | * |
---|
684 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
685 | */ |
---|
686 | |
---|
687 | int pthread_attr_getstackaddr( |
---|
688 | const pthread_attr_t *attr, |
---|
689 | void **stackaddr |
---|
690 | ) |
---|
691 | { |
---|
692 | if ( !attr || !attr->is_initialized ) |
---|
693 | return EINVAL; |
---|
694 | |
---|
695 | *stackaddr = attr->stackaddr; |
---|
696 | return 0; |
---|
697 | } |
---|
698 | |
---|
699 | /*PAGE |
---|
700 | * |
---|
701 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
702 | */ |
---|
703 | |
---|
704 | int pthread_attr_setstackaddr( |
---|
705 | pthread_attr_t *attr, |
---|
706 | void *stackaddr |
---|
707 | ) |
---|
708 | { |
---|
709 | if ( !attr || !attr->is_initialized ) |
---|
710 | return EINVAL; |
---|
711 | |
---|
712 | attr->stackaddr = stackaddr; |
---|
713 | return 0; |
---|
714 | } |
---|
715 | |
---|
716 | /*PAGE |
---|
717 | * |
---|
718 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
719 | */ |
---|
720 | |
---|
721 | int pthread_attr_getdetachstate( |
---|
722 | const pthread_attr_t *attr, |
---|
723 | int *detachstate |
---|
724 | ) |
---|
725 | { |
---|
726 | if ( !attr || !attr->is_initialized ) |
---|
727 | return EINVAL; |
---|
728 | |
---|
729 | *detachstate = attr->detachstate; |
---|
730 | return 0; |
---|
731 | } |
---|
732 | |
---|
733 | /*PAGE |
---|
734 | * |
---|
735 | * 16.1.1 Thread Creation Attributes, P1003.1c/Draft 10, p, 140 |
---|
736 | */ |
---|
737 | |
---|
738 | int pthread_attr_setdetachstate( |
---|
739 | pthread_attr_t *attr, |
---|
740 | int detachstate |
---|
741 | ) |
---|
742 | { |
---|
743 | if ( !attr || !attr->is_initialized ) |
---|
744 | return EINVAL; |
---|
745 | |
---|
746 | switch ( detachstate ) { |
---|
747 | case PTHREAD_CREATE_DETACHED: |
---|
748 | case PTHREAD_CREATE_JOINABLE: |
---|
749 | attr->detachstate = detachstate; |
---|
750 | return 0; |
---|
751 | |
---|
752 | default: |
---|
753 | return EINVAL; |
---|
754 | } |
---|
755 | } |
---|
756 | |
---|
757 | /*PAGE |
---|
758 | * |
---|
759 | * 16.1.2 Thread Creation, P1003.1c/Draft 10, p. 144 |
---|
760 | */ |
---|
761 | |
---|
762 | int pthread_create( |
---|
763 | pthread_t *thread, |
---|
764 | const pthread_attr_t *attr, |
---|
765 | void *(*start_routine)( void * ), |
---|
766 | void *arg |
---|
767 | ) |
---|
768 | { |
---|
769 | const pthread_attr_t *the_attr; |
---|
770 | Priority_Control core_priority; |
---|
771 | Thread_CPU_budget_algorithms budget_algorithm; |
---|
772 | Thread_CPU_budget_algorithm_callout budget_callout; |
---|
773 | boolean is_fp; |
---|
774 | boolean status; |
---|
775 | Thread_Control *the_thread; |
---|
776 | char *default_name = "psx"; |
---|
777 | POSIX_API_Control *api; |
---|
778 | int schedpolicy = SCHED_RR; |
---|
779 | struct sched_param schedparam; |
---|
780 | |
---|
781 | the_attr = (attr) ? attr : &_POSIX_Threads_Default_attributes; |
---|
782 | |
---|
783 | if ( !the_attr->is_initialized ) |
---|
784 | return EINVAL; |
---|
785 | |
---|
786 | /* |
---|
787 | * Core Thread Initialize insures we get the minimum amount of |
---|
788 | * stack space if it is allowed to allocate it itself. |
---|
789 | */ |
---|
790 | |
---|
791 | if ( the_attr->stackaddr && !_Stack_Is_enough( the_attr->stacksize ) ) |
---|
792 | return EINVAL; |
---|
793 | |
---|
794 | #if 0 |
---|
795 | int cputime_clock_allowed; /* see time.h */ |
---|
796 | POSIX_NOT_IMPLEMENTED(); |
---|
797 | #endif |
---|
798 | |
---|
799 | /* |
---|
800 | * P1003.1c/Draft 10, p. 121. |
---|
801 | * |
---|
802 | * If inheritsched is set to PTHREAD_INHERIT_SCHED, then this thread |
---|
803 | * inherits scheduling attributes from the creating thread. If it is |
---|
804 | * PTHREAD_EXPLICIT_SCHED, then scheduling parameters come from the |
---|
805 | * attributes structure. |
---|
806 | */ |
---|
807 | |
---|
808 | switch ( the_attr->inheritsched ) { |
---|
809 | case PTHREAD_INHERIT_SCHED: |
---|
810 | api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
811 | schedpolicy = api->schedpolicy; |
---|
812 | schedparam = api->schedparam; |
---|
813 | break; |
---|
814 | |
---|
815 | case PTHREAD_EXPLICIT_SCHED: |
---|
816 | schedpolicy = the_attr->schedpolicy; |
---|
817 | schedparam = the_attr->schedparam; |
---|
818 | break; |
---|
819 | |
---|
820 | default: |
---|
821 | return EINVAL; |
---|
822 | } |
---|
823 | |
---|
824 | /* |
---|
825 | * Check the contentionscope since rtems only supports PROCESS wide |
---|
826 | * contention (i.e. no system wide contention). |
---|
827 | */ |
---|
828 | |
---|
829 | if ( the_attr->contentionscope != PTHREAD_SCOPE_PROCESS ) |
---|
830 | return ENOSYS; |
---|
831 | |
---|
832 | /* |
---|
833 | * Interpret the scheduling parameters. |
---|
834 | */ |
---|
835 | |
---|
836 | if ( !_POSIX_Priority_Is_valid( schedparam.sched_priority ) ) |
---|
837 | return EINVAL; |
---|
838 | |
---|
839 | core_priority = _POSIX_Priority_To_core( schedparam.sched_priority ); |
---|
840 | |
---|
841 | /* |
---|
842 | * Set the core scheduling policy information. |
---|
843 | */ |
---|
844 | |
---|
845 | budget_callout = NULL; |
---|
846 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
---|
847 | |
---|
848 | switch ( schedpolicy ) { |
---|
849 | case SCHED_OTHER: |
---|
850 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE; |
---|
851 | break; |
---|
852 | |
---|
853 | case SCHED_FIFO: |
---|
854 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
---|
855 | break; |
---|
856 | |
---|
857 | case SCHED_RR: |
---|
858 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE; |
---|
859 | break; |
---|
860 | |
---|
861 | case SCHED_SPORADIC: |
---|
862 | budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT; |
---|
863 | budget_callout = _POSIX_Threads_Sporadic_budget_callout; |
---|
864 | |
---|
865 | if ( _POSIX_Timespec_to_interval( &schedparam.ss_replenish_period ) < |
---|
866 | _POSIX_Timespec_to_interval( &schedparam.ss_initial_budget ) ) |
---|
867 | return EINVAL; |
---|
868 | |
---|
869 | if ( !_POSIX_Priority_Is_valid( schedparam.ss_low_priority ) ) |
---|
870 | return EINVAL; |
---|
871 | |
---|
872 | break; |
---|
873 | |
---|
874 | default: |
---|
875 | return EINVAL; |
---|
876 | } |
---|
877 | |
---|
878 | /* |
---|
879 | * Currently all POSIX threads are floating point if the hardware |
---|
880 | * supports it. |
---|
881 | */ |
---|
882 | |
---|
883 | is_fp = CPU_HARDWARE_FP; |
---|
884 | |
---|
885 | /* |
---|
886 | * Disable dispatch for protection |
---|
887 | */ |
---|
888 | |
---|
889 | _Thread_Disable_dispatch(); |
---|
890 | |
---|
891 | /* |
---|
892 | * Allocate the thread control block. |
---|
893 | * |
---|
894 | * NOTE: Global threads are not currently supported. |
---|
895 | */ |
---|
896 | |
---|
897 | the_thread = _POSIX_Threads_Allocate(); |
---|
898 | |
---|
899 | if ( !the_thread ) { |
---|
900 | _Thread_Enable_dispatch(); |
---|
901 | return EINVAL; |
---|
902 | } |
---|
903 | |
---|
904 | /* |
---|
905 | * Initialize the core thread for this task. |
---|
906 | */ |
---|
907 | |
---|
908 | status = _Thread_Initialize( |
---|
909 | &_POSIX_Threads_Information, |
---|
910 | the_thread, |
---|
911 | the_attr->stackaddr, |
---|
912 | the_attr->stacksize, |
---|
913 | is_fp, |
---|
914 | core_priority, |
---|
915 | TRUE, /* preemptible */ |
---|
916 | budget_algorithm, |
---|
917 | budget_callout, |
---|
918 | 0, /* isr level */ |
---|
919 | &default_name /* posix threads don't have a name */ |
---|
920 | ); |
---|
921 | |
---|
922 | if ( !status ) { |
---|
923 | _POSIX_Threads_Free( the_thread ); |
---|
924 | _Thread_Enable_dispatch(); |
---|
925 | return EINVAL; |
---|
926 | } |
---|
927 | |
---|
928 | /* |
---|
929 | * finish initializing the per API structure |
---|
930 | */ |
---|
931 | |
---|
932 | |
---|
933 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
934 | |
---|
935 | api->Attributes = *the_attr; |
---|
936 | api->detachstate = attr->detachstate; |
---|
937 | api->schedpolicy = schedpolicy; |
---|
938 | api->schedparam = schedparam; |
---|
939 | |
---|
940 | /* |
---|
941 | * POSIX threads are allocated and started in one operation. |
---|
942 | */ |
---|
943 | |
---|
944 | status = _Thread_Start( |
---|
945 | the_thread, |
---|
946 | THREAD_START_POINTER, |
---|
947 | start_routine, |
---|
948 | arg, |
---|
949 | 0 /* unused */ |
---|
950 | ); |
---|
951 | |
---|
952 | if ( schedpolicy == SCHED_SPORADIC ) { |
---|
953 | _Watchdog_Insert_ticks( |
---|
954 | &api->Sporadic_timer, |
---|
955 | _POSIX_Timespec_to_interval( &api->schedparam.ss_replenish_period ) |
---|
956 | ); |
---|
957 | } |
---|
958 | |
---|
959 | /* |
---|
960 | * _Thread_Start only fails if the thread was in the incorrect state |
---|
961 | */ |
---|
962 | |
---|
963 | if ( !status ) { |
---|
964 | _POSIX_Threads_Free( the_thread ); |
---|
965 | _Thread_Enable_dispatch(); |
---|
966 | return EINVAL; |
---|
967 | } |
---|
968 | |
---|
969 | /* |
---|
970 | * Return the id and indicate we successfully created the thread |
---|
971 | */ |
---|
972 | |
---|
973 | *thread = the_thread->Object.id; |
---|
974 | |
---|
975 | _Thread_Enable_dispatch(); |
---|
976 | |
---|
977 | return 0; |
---|
978 | } |
---|
979 | |
---|
980 | /*PAGE |
---|
981 | * |
---|
982 | * 16.1.3 Wait for Thread Termination, P1003.1c/Draft 10, p. 147 |
---|
983 | */ |
---|
984 | |
---|
985 | int pthread_join( |
---|
986 | pthread_t thread, |
---|
987 | void **value_ptr |
---|
988 | ) |
---|
989 | { |
---|
990 | register Thread_Control *the_thread; |
---|
991 | POSIX_API_Control *api; |
---|
992 | Objects_Locations location; |
---|
993 | |
---|
994 | the_thread = _POSIX_Threads_Get( thread, &location ); |
---|
995 | switch ( location ) { |
---|
996 | case OBJECTS_ERROR: |
---|
997 | case OBJECTS_REMOTE: |
---|
998 | return ESRCH; |
---|
999 | case OBJECTS_LOCAL: |
---|
1000 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
1001 | |
---|
1002 | if ( api->detachstate == PTHREAD_CREATE_DETACHED ) { |
---|
1003 | _Thread_Enable_dispatch(); |
---|
1004 | return EINVAL; |
---|
1005 | } |
---|
1006 | |
---|
1007 | if ( _Thread_Is_executing( the_thread ) ) { |
---|
1008 | _Thread_Enable_dispatch(); |
---|
1009 | return EDEADLK; |
---|
1010 | } |
---|
1011 | |
---|
1012 | /* |
---|
1013 | * Put ourself on the threads join list |
---|
1014 | */ |
---|
1015 | |
---|
1016 | _Thread_Executing->Wait.return_argument = (unsigned32 *) value_ptr; |
---|
1017 | |
---|
1018 | _Thread_queue_Enter_critical_section( &api->Join_List ); |
---|
1019 | |
---|
1020 | _Thread_queue_Enqueue( &api->Join_List, WATCHDOG_NO_TIMEOUT ); |
---|
1021 | |
---|
1022 | _Thread_Enable_dispatch(); |
---|
1023 | |
---|
1024 | return 0; |
---|
1025 | } |
---|
1026 | |
---|
1027 | return POSIX_BOTTOM_REACHED(); |
---|
1028 | } |
---|
1029 | |
---|
1030 | /*PAGE |
---|
1031 | * |
---|
1032 | * 16.1.4 Detaching a Thread, P1003.1c/Draft 10, p. 149 |
---|
1033 | */ |
---|
1034 | |
---|
1035 | int pthread_detach( |
---|
1036 | pthread_t thread |
---|
1037 | ) |
---|
1038 | { |
---|
1039 | register Thread_Control *the_thread; |
---|
1040 | POSIX_API_Control *api; |
---|
1041 | Objects_Locations location; |
---|
1042 | |
---|
1043 | the_thread = _POSIX_Threads_Get( thread, &location ); |
---|
1044 | switch ( location ) { |
---|
1045 | case OBJECTS_ERROR: |
---|
1046 | case OBJECTS_REMOTE: |
---|
1047 | return ESRCH; |
---|
1048 | case OBJECTS_LOCAL: |
---|
1049 | |
---|
1050 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
1051 | api->detachstate = PTHREAD_CREATE_DETACHED; |
---|
1052 | _Thread_Enable_dispatch(); |
---|
1053 | return 0; |
---|
1054 | } |
---|
1055 | |
---|
1056 | return POSIX_BOTTOM_REACHED(); |
---|
1057 | } |
---|
1058 | |
---|
1059 | /*PAGE |
---|
1060 | * |
---|
1061 | * 16.1.5.1 Thread Termination, p1003.1c/Draft 10, p. 150 |
---|
1062 | * |
---|
1063 | * NOTE: Key destructors are executed in the POSIX api delete extension. |
---|
1064 | */ |
---|
1065 | |
---|
1066 | void pthread_exit( |
---|
1067 | void *value_ptr |
---|
1068 | ) |
---|
1069 | { |
---|
1070 | _Thread_Disable_dispatch(); |
---|
1071 | |
---|
1072 | _Thread_Executing->Wait.return_argument = (unsigned32 *)value_ptr; |
---|
1073 | |
---|
1074 | _Thread_Close( &_POSIX_Threads_Information, _Thread_Executing ); |
---|
1075 | |
---|
1076 | _POSIX_Threads_Free( _Thread_Executing ); |
---|
1077 | |
---|
1078 | _Thread_Enable_dispatch(); |
---|
1079 | } |
---|
1080 | |
---|
1081 | /*PAGE |
---|
1082 | * |
---|
1083 | * 16.1.6 Get Calling Thread's ID, p1003.1c/Draft 10, p. 152 |
---|
1084 | */ |
---|
1085 | |
---|
1086 | pthread_t pthread_self( void ) |
---|
1087 | { |
---|
1088 | return _Thread_Executing->Object.id; |
---|
1089 | } |
---|
1090 | |
---|
1091 | /*PAGE |
---|
1092 | * |
---|
1093 | * 16.1.7 Compare Thread IDs, p1003.1c/Draft 10, p. 153 |
---|
1094 | * |
---|
1095 | * NOTE: POSIX does not define the behavior when either thread id is invalid. |
---|
1096 | */ |
---|
1097 | |
---|
1098 | int pthread_equal( |
---|
1099 | pthread_t t1, |
---|
1100 | pthread_t t2 |
---|
1101 | ) |
---|
1102 | { |
---|
1103 | /* |
---|
1104 | * If the system is configured for debug, then we will do everything we |
---|
1105 | * can to insure that both ids are valid. Otherwise, we will do the |
---|
1106 | * cheapest possible thing to determine if they are equal. |
---|
1107 | */ |
---|
1108 | |
---|
1109 | #ifndef RTEMS_DEBUG |
---|
1110 | return _Objects_Are_ids_equal( t1, t2 ); |
---|
1111 | #else |
---|
1112 | int status; |
---|
1113 | Objects_Locations location; |
---|
1114 | |
---|
1115 | /* |
---|
1116 | * By default this is not a match. |
---|
1117 | */ |
---|
1118 | |
---|
1119 | status = 0; |
---|
1120 | |
---|
1121 | /* |
---|
1122 | * Validate the first id and return 0 if it is not valid |
---|
1123 | */ |
---|
1124 | |
---|
1125 | (void) _POSIX_Threads_Get( t1, &location ); |
---|
1126 | switch ( location ) { |
---|
1127 | case OBJECTS_ERROR: |
---|
1128 | case OBJECTS_REMOTE: |
---|
1129 | break; |
---|
1130 | |
---|
1131 | case OBJECTS_LOCAL: |
---|
1132 | |
---|
1133 | /* |
---|
1134 | * Validate the second id and return 0 if it is not valid |
---|
1135 | */ |
---|
1136 | |
---|
1137 | (void) _POSIX_Threads_Get( t2, &location ); |
---|
1138 | switch ( location ) { |
---|
1139 | case OBJECTS_ERROR: |
---|
1140 | case OBJECTS_REMOTE: |
---|
1141 | break; |
---|
1142 | case OBJECTS_LOCAL: |
---|
1143 | status = _Objects_Are_ids_equal( t1, t2 ); |
---|
1144 | break; |
---|
1145 | } |
---|
1146 | _Thread_Unnest_dispatch(); |
---|
1147 | break; |
---|
1148 | } |
---|
1149 | |
---|
1150 | _Thread_Enable_dispatch(); |
---|
1151 | return status; |
---|
1152 | #endif |
---|
1153 | } |
---|
1154 | |
---|
1155 | /*PAGE |
---|
1156 | * |
---|
1157 | * 16.1.8 Dynamic Package Initialization, P1003.1c/Draft 10, p. 154 |
---|
1158 | */ |
---|
1159 | |
---|
1160 | int pthread_once( |
---|
1161 | pthread_once_t *once_control, |
---|
1162 | void (*init_routine)(void) |
---|
1163 | ) |
---|
1164 | { |
---|
1165 | if ( !once_control || !init_routine ) |
---|
1166 | return EINVAL; |
---|
1167 | |
---|
1168 | _Thread_Disable_dispatch(); |
---|
1169 | |
---|
1170 | if ( !once_control->init_executed ) { |
---|
1171 | once_control->is_initialized = TRUE; |
---|
1172 | once_control->init_executed = TRUE; |
---|
1173 | (*init_routine)(); |
---|
1174 | } |
---|
1175 | |
---|
1176 | _Thread_Enable_dispatch(); |
---|
1177 | return 0; |
---|
1178 | } |
---|
1179 | |
---|
1180 | /*PAGE |
---|
1181 | * |
---|
1182 | * 20.1.6 Accessing a Thread CPU-time Clock, P1003.4b/Draft 8, p. 58 |
---|
1183 | */ |
---|
1184 | |
---|
1185 | int pthread_getcpuclockid( |
---|
1186 | pthread_t pid, |
---|
1187 | clockid_t *clock_id |
---|
1188 | ) |
---|
1189 | { |
---|
1190 | return POSIX_NOT_IMPLEMENTED(); |
---|
1191 | } |
---|
1192 | |
---|
1193 | /*PAGE |
---|
1194 | * |
---|
1195 | * 20.1.7 CPU-time Clock Thread Creation Attribute, P1003.4b/Draft 8, p. 59 |
---|
1196 | */ |
---|
1197 | |
---|
1198 | int pthread_attr_setcputime( |
---|
1199 | pthread_attr_t *attr, |
---|
1200 | int clock_allowed |
---|
1201 | ) |
---|
1202 | { |
---|
1203 | if ( !attr || !attr->is_initialized ) |
---|
1204 | return EINVAL; |
---|
1205 | |
---|
1206 | switch ( clock_allowed ) { |
---|
1207 | case CLOCK_ENABLED: |
---|
1208 | case CLOCK_DISABLED: |
---|
1209 | attr->cputime_clock_allowed = clock_allowed; |
---|
1210 | return 0; |
---|
1211 | |
---|
1212 | default: |
---|
1213 | return EINVAL; |
---|
1214 | } |
---|
1215 | } |
---|
1216 | |
---|
1217 | /*PAGE |
---|
1218 | * |
---|
1219 | * 20.1.7 CPU-time Clock Thread Creation Attribute, P1003.4b/Draft 8, p. 59 |
---|
1220 | */ |
---|
1221 | |
---|
1222 | int pthread_attr_getcputime( |
---|
1223 | pthread_attr_t *attr, |
---|
1224 | int *clock_allowed |
---|
1225 | ) |
---|
1226 | { |
---|
1227 | if ( !attr || !attr->is_initialized ) |
---|
1228 | return EINVAL; |
---|
1229 | |
---|
1230 | *clock_allowed = attr->cputime_clock_allowed; |
---|
1231 | return 0; |
---|
1232 | } |
---|