[eb08acf] | 1 | /** |
---|
| 2 | * @file |
---|
| 3 | * |
---|
| 4 | * @brief Private Support Information for POSIX Threads |
---|
| 5 | * @ingroup POSIX_PTHREADS Private Threads |
---|
| 6 | */ |
---|
| 7 | |
---|
[8165b48f] | 8 | /* |
---|
[3bacb250] | 9 | * COPYRIGHT (c) 1989-2010. |
---|
[412dbff6] | 10 | * On-Line Applications Research Corporation (OAR). |
---|
| 11 | * |
---|
| 12 | * The license and distribution terms for this file may be |
---|
| 13 | * found in the file LICENSE in this distribution or at |
---|
| 14 | * http://www.rtems.com/license/LICENSE. |
---|
[5e9b32b] | 15 | */ |
---|
| 16 | |
---|
[f42b726] | 17 | #if HAVE_CONFIG_H |
---|
| 18 | #include "config.h" |
---|
| 19 | #endif |
---|
| 20 | |
---|
[5e9b32b] | 21 | #include <errno.h> |
---|
| 22 | #include <pthread.h> |
---|
| 23 | #include <limits.h> |
---|
| 24 | |
---|
[f4719d5a] | 25 | #include <rtems/system.h> |
---|
[309e2f6] | 26 | #include <rtems/config.h> |
---|
[5a18e04] | 27 | #include <rtems/score/apiext.h> |
---|
[5e9b32b] | 28 | #include <rtems/score/stack.h> |
---|
[5618c37a] | 29 | #include <rtems/score/threadimpl.h> |
---|
[a112364] | 30 | #include <rtems/score/threadqimpl.h> |
---|
[3be0c9a] | 31 | #include <rtems/score/userextimpl.h> |
---|
[4b48ece0] | 32 | #include <rtems/score/watchdogimpl.h> |
---|
[5a18e04] | 33 | #include <rtems/score/wkspace.h> |
---|
[2df1974] | 34 | #include <rtems/posix/cancel.h> |
---|
[0c5317d] | 35 | #include <rtems/posix/pthreadimpl.h> |
---|
[97552c98] | 36 | #include <rtems/posix/priorityimpl.h> |
---|
[f9340ed7] | 37 | #include <rtems/posix/psignalimpl.h> |
---|
[5a18e04] | 38 | #include <rtems/posix/config.h> |
---|
[2ad250e] | 39 | #include <rtems/posix/keyimpl.h> |
---|
[624133c] | 40 | #include <rtems/posix/time.h> |
---|
[c16bcc0] | 41 | #include <rtems/score/timespec.h> |
---|
[5e9b32b] | 42 | |
---|
[a1f0ca28] | 43 | /* |
---|
[5e9b32b] | 44 | * The default pthreads attributes structure. |
---|
[65c421f] | 45 | * |
---|
[874297f3] | 46 | * NOTE: Be careful .. if the default attribute set changes, |
---|
[65c421f] | 47 | * _POSIX_Threads_Initialize_user_threads will need to be examined. |
---|
[5e9b32b] | 48 | */ |
---|
| 49 | const pthread_attr_t _POSIX_Threads_Default_attributes = { |
---|
[b1dbfd7] | 50 | true, /* is_initialized */ |
---|
[0b710dbb] | 51 | NULL, /* stackaddr */ |
---|
[ecf0f4c] | 52 | 0, /* stacksize -- will be adjusted to minimum */ |
---|
[0b710dbb] | 53 | PTHREAD_SCOPE_PROCESS, /* contentionscope */ |
---|
[65c421f] | 54 | PTHREAD_INHERIT_SCHED, /* inheritsched */ |
---|
[0b710dbb] | 55 | SCHED_FIFO, /* schedpolicy */ |
---|
| 56 | { /* schedparam */ |
---|
| 57 | 2, /* sched_priority */ |
---|
[85e0a22] | 58 | #if defined(_POSIX_SPORADIC_SERVER) || \ |
---|
| 59 | defined(_POSIX_THREAD_SPORADIC_SERVER) |
---|
| 60 | 0, /* sched_ss_low_priority */ |
---|
| 61 | { 0L, 0 }, /* sched_ss_repl_period */ |
---|
[29aed671] | 62 | { 0L, 0 }, /* sched_ss_init_budget */ |
---|
| 63 | 0 /* sched_ss_max_repl */ |
---|
[85e0a22] | 64 | #endif |
---|
[5e9b32b] | 65 | }, |
---|
[21dd3ab8] | 66 | #if HAVE_DECL_PTHREAD_ATTR_SETGUARDSIZE |
---|
| 67 | 0, /* guardsize */ |
---|
| 68 | #endif |
---|
[85e0a22] | 69 | #if defined(_POSIX_THREAD_CPUTIME) |
---|
| 70 | 1, /* cputime_clock_allowed */ |
---|
| 71 | #endif |
---|
[0b710dbb] | 72 | PTHREAD_CREATE_JOINABLE, /* detachstate */ |
---|
[5e9b32b] | 73 | }; |
---|
| 74 | |
---|
[a1f0ca28] | 75 | /* |
---|
[65a5c1b] | 76 | * _POSIX_Threads_Sporadic_budget_TSR |
---|
| 77 | */ |
---|
| 78 | void _POSIX_Threads_Sporadic_budget_TSR( |
---|
[92f4671] | 79 | Objects_Id id __attribute__((unused)), |
---|
[65a5c1b] | 80 | void *argument |
---|
| 81 | ) |
---|
| 82 | { |
---|
[39cefdd] | 83 | uint32_t ticks; |
---|
| 84 | uint32_t new_priority; |
---|
[65a5c1b] | 85 | Thread_Control *the_thread; |
---|
| 86 | POSIX_API_Control *api; |
---|
| 87 | |
---|
| 88 | the_thread = argument; |
---|
| 89 | |
---|
| 90 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
| 91 | |
---|
[770db69] | 92 | /* ticks is guaranteed to be at least one */ |
---|
[3bacb250] | 93 | ticks = _Timespec_To_ticks( &api->schedparam.sched_ss_init_budget ); |
---|
[65a5c1b] | 94 | |
---|
[2014063] | 95 | the_thread->cpu_time_budget = ticks; |
---|
[874297f3] | 96 | |
---|
[3bacb250] | 97 | new_priority = _POSIX_Priority_To_core( api->schedparam.sched_priority ); |
---|
[2014063] | 98 | the_thread->real_priority = new_priority; |
---|
| 99 | |
---|
[a1f0ca28] | 100 | /* |
---|
| 101 | * If holding a resource, then do not change it. |
---|
| 102 | */ |
---|
| 103 | #if 0 |
---|
| 104 | printk( "TSR %d %d %d\n", the_thread->resource_count, |
---|
| 105 | the_thread->current_priority, new_priority ); |
---|
| 106 | #endif |
---|
| 107 | if ( the_thread->resource_count == 0 ) { |
---|
| 108 | /* |
---|
| 109 | * If this would make them less important, then do not change it. |
---|
| 110 | */ |
---|
| 111 | if ( the_thread->current_priority > new_priority ) { |
---|
| 112 | _Thread_Change_priority( the_thread, new_priority, true ); |
---|
| 113 | #if 0 |
---|
| 114 | printk( "raise priority\n" ); |
---|
| 115 | #endif |
---|
| 116 | } |
---|
| 117 | } |
---|
[2014063] | 118 | |
---|
[770db69] | 119 | /* ticks is guaranteed to be at least one */ |
---|
[3bacb250] | 120 | ticks = _Timespec_To_ticks( &api->schedparam.sched_ss_repl_period ); |
---|
[2014063] | 121 | |
---|
| 122 | _Watchdog_Insert_ticks( &api->Sporadic_timer, ticks ); |
---|
[65a5c1b] | 123 | } |
---|
| 124 | |
---|
[a1f0ca28] | 125 | /* |
---|
[65a5c1b] | 126 | * _POSIX_Threads_Sporadic_budget_callout |
---|
| 127 | */ |
---|
| 128 | void _POSIX_Threads_Sporadic_budget_callout( |
---|
| 129 | Thread_Control *the_thread |
---|
| 130 | ) |
---|
| 131 | { |
---|
[2014063] | 132 | POSIX_API_Control *api; |
---|
[39cefdd] | 133 | uint32_t new_priority; |
---|
[65a5c1b] | 134 | |
---|
[2014063] | 135 | api = the_thread->API_Extensions[ THREAD_API_POSIX ]; |
---|
[65a5c1b] | 136 | |
---|
[2014063] | 137 | /* |
---|
| 138 | * This will prevent the thread from consuming its entire "budget" |
---|
| 139 | * while at low priority. |
---|
| 140 | */ |
---|
| 141 | the_thread->cpu_time_budget = 0xFFFFFFFF; /* XXX should be based on MAX_U32 */ |
---|
| 142 | |
---|
[3bacb250] | 143 | new_priority = _POSIX_Priority_To_core(api->schedparam.sched_ss_low_priority); |
---|
[2014063] | 144 | the_thread->real_priority = new_priority; |
---|
| 145 | |
---|
[a1f0ca28] | 146 | /* |
---|
| 147 | * If holding a resource, then do not change it. |
---|
| 148 | */ |
---|
| 149 | #if 0 |
---|
| 150 | printk( "callout %d %d %d\n", the_thread->resource_count, |
---|
| 151 | the_thread->current_priority, new_priority ); |
---|
| 152 | #endif |
---|
| 153 | if ( the_thread->resource_count == 0 ) { |
---|
| 154 | /* |
---|
| 155 | * Make sure we are actually lowering it. If they have lowered it |
---|
[3bacb250] | 156 | * to logically lower than sched_ss_low_priority, then we do not want to |
---|
[a1f0ca28] | 157 | * change it. |
---|
| 158 | */ |
---|
| 159 | if ( the_thread->current_priority < new_priority ) { |
---|
| 160 | _Thread_Change_priority( the_thread, new_priority, true ); |
---|
| 161 | #if 0 |
---|
| 162 | printk( "lower priority\n" ); |
---|
| 163 | #endif |
---|
| 164 | } |
---|
| 165 | } |
---|
[65a5c1b] | 166 | } |
---|
| 167 | |
---|
[a1f0ca28] | 168 | /* |
---|
[5a18e04] | 169 | * _POSIX_Threads_Create_extension |
---|
| 170 | * |
---|
[a1f0ca28] | 171 | * This method is invoked for each thread created. |
---|
[5a18e04] | 172 | */ |
---|
[874297f3] | 173 | |
---|
[29aed671] | 174 | static bool _POSIX_Threads_Create_extension( |
---|
[92f4671] | 175 | Thread_Control *executing __attribute__((unused)), |
---|
[5a18e04] | 176 | Thread_Control *created |
---|
| 177 | ) |
---|
| 178 | { |
---|
| 179 | POSIX_API_Control *api; |
---|
[65c421f] | 180 | POSIX_API_Control *executing_api; |
---|
[874297f3] | 181 | |
---|
[5a18e04] | 182 | api = _Workspace_Allocate( sizeof( POSIX_API_Control ) ); |
---|
[874297f3] | 183 | |
---|
[5a18e04] | 184 | if ( !api ) |
---|
[f8437c8] | 185 | return false; |
---|
[874297f3] | 186 | |
---|
[5a18e04] | 187 | created->API_Extensions[ THREAD_API_POSIX ] = api; |
---|
[874297f3] | 188 | |
---|
[b85649c4] | 189 | /* XXX check all fields are touched */ |
---|
[895efd9] | 190 | api->Attributes = _POSIX_Threads_Default_attributes; |
---|
| 191 | api->detachstate = _POSIX_Threads_Default_attributes.detachstate; |
---|
| 192 | api->schedpolicy = _POSIX_Threads_Default_attributes.schedpolicy; |
---|
| 193 | api->schedparam = _POSIX_Threads_Default_attributes.schedparam; |
---|
[874297f3] | 194 | api->schedparam.sched_priority = |
---|
[895efd9] | 195 | _POSIX_Priority_From_core( created->current_priority ); |
---|
[874297f3] | 196 | |
---|
| 197 | /* |
---|
[b6c868e] | 198 | * POSIX 1003.1 1996, 18.2.2.2 |
---|
| 199 | */ |
---|
| 200 | api->cancelation_requested = 0; |
---|
| 201 | api->cancelability_state = PTHREAD_CANCEL_ENABLE; |
---|
| 202 | api->cancelability_type = PTHREAD_CANCEL_DEFERRED; |
---|
| 203 | _Chain_Initialize_empty (&api->Cancellation_Handlers); |
---|
| 204 | |
---|
[b85649c4] | 205 | /* |
---|
| 206 | * If the thread is not a posix thread, then all posix signals are blocked |
---|
| 207 | * by default. |
---|
[2212a2ad] | 208 | * |
---|
| 209 | * The check for class == 1 is debug. Should never really happen. |
---|
[b85649c4] | 210 | */ |
---|
| 211 | |
---|
| 212 | /* XXX use signal constants */ |
---|
| 213 | api->signals_pending = 0; |
---|
[2212a2ad] | 214 | if ( _Objects_Get_API( created->Object.id ) == OBJECTS_POSIX_API |
---|
| 215 | #if defined(RTEMS_DEBUG) |
---|
[a1f0ca28] | 216 | && _Objects_Get_class( created->Object.id ) == 1 |
---|
[2212a2ad] | 217 | #endif |
---|
| 218 | ) { |
---|
[65c421f] | 219 | executing_api = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
---|
[7349e6d0] | 220 | api->signals_blocked = executing_api->signals_blocked; |
---|
| 221 | } else { |
---|
[b85649c4] | 222 | api->signals_blocked = 0xffffffff; |
---|
[7349e6d0] | 223 | } |
---|
[b85649c4] | 224 | |
---|
[895efd9] | 225 | _Thread_queue_Initialize( |
---|
| 226 | &api->Join_List, |
---|
| 227 | THREAD_QUEUE_DISCIPLINE_FIFO, |
---|
[f05af6b7] | 228 | STATES_WAITING_FOR_JOIN_AT_EXIT | STATES_INTERRUPTIBLE_BY_SIGNAL, |
---|
[895efd9] | 229 | 0 |
---|
| 230 | ); |
---|
[874297f3] | 231 | |
---|
[895efd9] | 232 | _Watchdog_Initialize( |
---|
| 233 | &api->Sporadic_timer, |
---|
| 234 | _POSIX_Threads_Sporadic_budget_TSR, |
---|
| 235 | created->Object.id, |
---|
| 236 | created |
---|
| 237 | ); |
---|
[5a18e04] | 238 | |
---|
[b5c9064] | 239 | /** initialize thread's key vaule node chain */ |
---|
| 240 | _Chain_Initialize_empty( &api->Key_Chain ); |
---|
| 241 | |
---|
[f8437c8] | 242 | return true; |
---|
[5a18e04] | 243 | } |
---|
[895efd9] | 244 | |
---|
[a1f0ca28] | 245 | /* |
---|
[5a18e04] | 246 | * _POSIX_Threads_Delete_extension |
---|
[a1f0ca28] | 247 | * |
---|
| 248 | * This method is invoked for each thread deleted. |
---|
[5a18e04] | 249 | */ |
---|
[29aed671] | 250 | static void _POSIX_Threads_Delete_extension( |
---|
[92f4671] | 251 | Thread_Control *executing __attribute__((unused)), |
---|
[5a18e04] | 252 | Thread_Control *deleted |
---|
| 253 | ) |
---|
| 254 | { |
---|
[895efd9] | 255 | Thread_Control *the_thread; |
---|
| 256 | POSIX_API_Control *api; |
---|
| 257 | void **value_ptr; |
---|
| 258 | |
---|
[a61f1a46] | 259 | api = deleted->API_Extensions[ THREAD_API_POSIX ]; |
---|
[874297f3] | 260 | |
---|
[f845e96e] | 261 | /* |
---|
| 262 | * Run the POSIX cancellation handlers |
---|
| 263 | */ |
---|
[345fc11] | 264 | _POSIX_Threads_cancel_run( deleted ); |
---|
[895efd9] | 265 | |
---|
[345fc11] | 266 | /* |
---|
| 267 | * Run all the key destructors |
---|
| 268 | */ |
---|
[895efd9] | 269 | _POSIX_Keys_Run_destructors( deleted ); |
---|
| 270 | |
---|
| 271 | /* |
---|
| 272 | * Wakeup all the tasks which joined with this one |
---|
| 273 | */ |
---|
| 274 | value_ptr = (void **) deleted->Wait.return_argument; |
---|
| 275 | |
---|
| 276 | while ( (the_thread = _Thread_queue_Dequeue( &api->Join_List )) ) |
---|
| 277 | *(void **)the_thread->Wait.return_argument = value_ptr; |
---|
[874297f3] | 278 | |
---|
[895efd9] | 279 | if ( api->schedpolicy == SCHED_SPORADIC ) |
---|
| 280 | (void) _Watchdog_Remove( &api->Sporadic_timer ); |
---|
[a61f1a46] | 281 | |
---|
| 282 | deleted->API_Extensions[ THREAD_API_POSIX ] = NULL; |
---|
| 283 | |
---|
[a0323a9f] | 284 | _Workspace_Free( api ); |
---|
[5a18e04] | 285 | } |
---|
| 286 | |
---|
[260b0c2] | 287 | /* |
---|
| 288 | * _POSIX_Threads_Exitted_extension |
---|
[a1f0ca28] | 289 | * |
---|
| 290 | * This method is invoked each time a thread exits. |
---|
[260b0c2] | 291 | */ |
---|
[29aed671] | 292 | static void _POSIX_Threads_Exitted_extension( |
---|
[260b0c2] | 293 | Thread_Control *executing |
---|
| 294 | ) |
---|
| 295 | { |
---|
[092fe28e] | 296 | /* |
---|
| 297 | * If the executing thread was not created with the POSIX API, then this |
---|
| 298 | * API do not get to define its exit behavior. |
---|
| 299 | */ |
---|
| 300 | if ( _Objects_Get_API( executing->Object.id ) == OBJECTS_POSIX_API ) |
---|
| 301 | pthread_exit( executing->Wait.return_argument ); |
---|
[260b0c2] | 302 | } |
---|
| 303 | |
---|
[a1f0ca28] | 304 | /* |
---|
[dd32d883] | 305 | * _POSIX_Threads_Initialize_user_threads |
---|
[5a18e04] | 306 | * |
---|
| 307 | * This routine creates and starts all configured user |
---|
[76f1677] | 308 | * initialization threads. |
---|
[5a18e04] | 309 | */ |
---|
[29aed671] | 310 | static void _POSIX_Threads_Initialize_user_threads( void ) |
---|
[5a18e04] | 311 | { |
---|
[0ab34c90] | 312 | if ( _POSIX_Threads_Initialize_user_threads_p ) |
---|
| 313 | (*_POSIX_Threads_Initialize_user_threads_p)(); |
---|
[5a18e04] | 314 | } |
---|
| 315 | |
---|
[a1f0ca28] | 316 | /* |
---|
[22b4b2e] | 317 | * API Extension control structures |
---|
| 318 | */ |
---|
[5a18e04] | 319 | API_extensions_Control _POSIX_Threads_API_extensions = { |
---|
[27b961a] | 320 | #if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API) |
---|
[04b5d17] | 321 | .predriver_hook = NULL, |
---|
[27b961a] | 322 | #endif |
---|
[04b5d17] | 323 | .postdriver_hook = _POSIX_Threads_Initialize_user_threads |
---|
| 324 | }; |
---|
| 325 | |
---|
[5a18e04] | 326 | User_extensions_Control _POSIX_Threads_User_extensions = { |
---|
| 327 | { NULL, NULL }, |
---|
[aa08739a] | 328 | { { NULL, NULL }, NULL }, |
---|
[5a18e04] | 329 | { _POSIX_Threads_Create_extension, /* create */ |
---|
| 330 | NULL, /* start */ |
---|
| 331 | NULL, /* restart */ |
---|
| 332 | _POSIX_Threads_Delete_extension, /* delete */ |
---|
| 333 | NULL, /* switch */ |
---|
| 334 | NULL, /* begin */ |
---|
[260b0c2] | 335 | _POSIX_Threads_Exitted_extension, /* exitted */ |
---|
[5a18e04] | 336 | NULL /* fatal */ |
---|
| 337 | } |
---|
| 338 | }; |
---|
[874297f3] | 339 | |
---|
[a1f0ca28] | 340 | /* |
---|
[5e9b32b] | 341 | * _POSIX_Threads_Manager_initialization |
---|
| 342 | * |
---|
| 343 | * This routine initializes all threads manager related data structures. |
---|
| 344 | */ |
---|
[309e2f6] | 345 | void _POSIX_Threads_Manager_initialization(void) |
---|
[5e9b32b] | 346 | { |
---|
| 347 | _Objects_Initialize_information( |
---|
[3c465878] | 348 | &_POSIX_Threads_Information, /* object information table */ |
---|
| 349 | OBJECTS_POSIX_API, /* object API */ |
---|
| 350 | OBJECTS_POSIX_THREADS, /* object class */ |
---|
[309e2f6] | 351 | Configuration_POSIX_API.maximum_threads, |
---|
| 352 | /* maximum objects of this class */ |
---|
[e811d68] | 353 | sizeof( Thread_Control ), |
---|
[3c465878] | 354 | /* size of this object's control block */ |
---|
[b1dbfd7] | 355 | true, /* true if names for this object are strings */ |
---|
[309e2f6] | 356 | _POSIX_PATH_MAX /* maximum length of each object's name */ |
---|
[3c465878] | 357 | #if defined(RTEMS_MULTIPROCESSING) |
---|
| 358 | , |
---|
[b1dbfd7] | 359 | false, /* true if this is a global object class */ |
---|
[3c465878] | 360 | NULL /* Proxy extraction support callout */ |
---|
| 361 | #endif |
---|
[5e9b32b] | 362 | ); |
---|
[5a18e04] | 363 | |
---|
[613cff6] | 364 | /* |
---|
| 365 | * Add all the extensions for this API |
---|
| 366 | */ |
---|
| 367 | _User_extensions_Add_API_set( &_POSIX_Threads_User_extensions ); |
---|
[f845e96e] | 368 | |
---|
[613cff6] | 369 | _API_extensions_Add( &_POSIX_Threads_API_extensions ); |
---|
[f845e96e] | 370 | |
---|
[613cff6] | 371 | /* |
---|
| 372 | * If we supported MP, then here we would ... |
---|
| 373 | * Register the MP Process Packet routine. |
---|
| 374 | */ |
---|
[5e9b32b] | 375 | } |
---|