1 /* Linuxthreads - a simple clone()-based implementation of Posix */ 2 /* threads for Linux. */ 3 /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ 4 /* */ 5 /* This program is free software; you can redistribute it and/or */ 6 /* modify it under the terms of the GNU Library General Public License */ 7 /* as published by the Free Software Foundation; either version 2 */ 8 /* of the License, or (at your option) any later version. */ 9 /* */ 10 /* This program is distributed in the hope that it will be useful, */ 11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 13 /* GNU Library General Public License for more details. */ 14 15 #ifndef _PTHREAD_H 16 #define _PTHREAD_H 1 17 18 #include <features.h> 19 20 #include <sched.h> 21 #include <time.h> 22 23 #include <signal.h> 24 #include <bits/pthreadtypes.h> 25 #include <bits/initspin.h> 26 27 28 __BEGIN_DECLS 29 30 /* Initializers. */ 31 32 #define PTHREAD_MUTEX_INITIALIZER \ 33 {0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, __LOCK_INITIALIZER} 34 #ifdef __USE_GNU 35 # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ 36 {0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, __LOCK_INITIALIZER} 37 # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ 38 {0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, __LOCK_INITIALIZER} 39 # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ 40 {0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, __LOCK_INITIALIZER} 41 #endif 42 43 #define PTHREAD_COND_INITIALIZER {__LOCK_INITIALIZER, 0} 44 45 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 46 # define PTHREAD_RWLOCK_INITIALIZER \ 47 { __LOCK_INITIALIZER, 0, NULL, NULL, NULL, \ 48 PTHREAD_RWLOCK_DEFAULT_NP, PTHREAD_PROCESS_PRIVATE } 49 #endif 50 #ifdef __USE_GNU 51 # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 52 { __LOCK_INITIALIZER, 0, NULL, NULL, NULL, \ 53 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, PTHREAD_PROCESS_PRIVATE } 54 #endif 55 56 /* Values for attributes. */ 57 58 enum 59 { 60 PTHREAD_CREATE_JOINABLE, 61 #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_JOINABLE 62 PTHREAD_CREATE_DETACHED 63 #define PTHREAD_CREATE_DETACHED PTHREAD_CREATE_DETACHED 64 }; 65 66 enum 67 { 68 PTHREAD_INHERIT_SCHED, 69 #define PTHREAD_INHERIT_SCHED PTHREAD_INHERIT_SCHED 70 PTHREAD_EXPLICIT_SCHED 71 #define PTHREAD_EXPLICIT_SCHED PTHREAD_EXPLICIT_SCHED 72 }; 73 74 enum 75 { 76 PTHREAD_SCOPE_SYSTEM, 77 #define PTHREAD_SCOPE_SYSTEM PTHREAD_SCOPE_SYSTEM 78 PTHREAD_SCOPE_PROCESS 79 #define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_PROCESS 80 }; 81 82 enum 83 { 84 PTHREAD_MUTEX_ADAPTIVE_NP, 85 PTHREAD_MUTEX_RECURSIVE_NP, 86 PTHREAD_MUTEX_ERRORCHECK_NP, 87 PTHREAD_MUTEX_TIMED_NP 88 #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 89 , 90 PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_ADAPTIVE_NP, 91 PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP, 92 PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP, 93 PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL 94 #endif 95 #ifdef __USE_GNU 96 /* For compatibility. */ 97 , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_ADAPTIVE_NP 98 #endif 99 }; 100 101 enum 102 { 103 PTHREAD_PROCESS_PRIVATE, 104 #define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE 105 PTHREAD_PROCESS_SHARED 106 #define PTHREAD_PROCESS_SHARED PTHREAD_PROCESS_SHARED 107 }; 108 109 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 110 enum 111 { 112 PTHREAD_RWLOCK_PREFER_READER_NP, 113 PTHREAD_RWLOCK_PREFER_WRITER_NP, 114 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 115 PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_WRITER_NP 116 }; 117 #endif /* Unix98 */ 118 119 #define PTHREAD_ONCE_INIT 0 120 121 /* Special constants */ 122 123 #ifdef __USE_XOPEN2K 124 /* -1 is distinct from 0 and all errno constants */ 125 # define PTHREAD_BARRIER_SERIAL_THREAD -1 126 #endif 127 128 /* Cleanup buffers */ 129 130 struct _pthread_cleanup_buffer 131 { 132 void (*__routine) (void *); /* Function to call. */ 133 void *__arg; /* Its argument. */ 134 int __canceltype; /* Saved cancellation type. */ 135 struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions. */ 136 }; 137 138 /* Cancellation */ 139 140 enum 141 { 142 PTHREAD_CANCEL_ENABLE, 143 #define PTHREAD_CANCEL_ENABLE PTHREAD_CANCEL_ENABLE 144 PTHREAD_CANCEL_DISABLE 145 #define PTHREAD_CANCEL_DISABLE PTHREAD_CANCEL_DISABLE 146 }; 147 enum 148 { 149 PTHREAD_CANCEL_DEFERRED, 150 #define PTHREAD_CANCEL_DEFERRED PTHREAD_CANCEL_DEFERRED 151 PTHREAD_CANCEL_ASYNCHRONOUS 152 #define PTHREAD_CANCEL_ASYNCHRONOUS PTHREAD_CANCEL_ASYNCHRONOUS 153 }; 154 #define PTHREAD_CANCELED ((void *) -1) 155 156 157 /* Function for handling threads. */ 158 159 /* Create a thread with given attributes ATTR (or default attributes 160 if ATTR is NULL), and call function START_ROUTINE with given 161 arguments ARG. */ 162 extern int pthread_create (pthread_t *__restrict __threadp, 163 const pthread_attr_t *__restrict __attr, 164 void *(*__start_routine) (void *), 165 void *__restrict __arg) __THROWNL; 166 167 /* Obtain the identifier of the current thread. */ 168 extern pthread_t pthread_self (void) __THROW; 169 170 /* Compare two thread identifiers. */ 171 extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW; 172 173 /* Terminate calling thread. */ 174 extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__)); 175 176 /* Make calling thread wait for termination of the thread TH. The 177 exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN 178 is not NULL. */ 179 extern int pthread_join (pthread_t __th, void **__thread_return); 180 181 #ifdef __USE_GNU 182 /* Check whether thread TH has terminated. If yes return the status of 183 the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL. */ 184 extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW; 185 186 /* Make calling thread wait for termination of the thread TH, but only 187 until TIMEOUT. The exit status of the thread is stored in 188 *THREAD_RETURN, if THREAD_RETURN is not NULL. 189 190 This function is a cancellation point and therefore not marked with 191 __THROW. */ 192 extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return, 193 __const struct timespec *__abstime); 194 #endif 195 196 /* Indicate that the thread TH is never to be joined with PTHREAD_JOIN. 197 The resources of TH will therefore be freed immediately when it 198 terminates, instead of waiting for another thread to perform PTHREAD_JOIN 199 on it. */ 200 extern int pthread_detach (pthread_t __th) __THROW; 201 202 203 /* Functions for handling attributes. */ 204 205 /* Initialize thread attribute *ATTR with default attributes 206 (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER, 207 no user-provided stack). */ 208 extern int pthread_attr_init (pthread_attr_t *__attr) __THROW; 209 210 /* Destroy thread attribute *ATTR. */ 211 extern int pthread_attr_destroy (pthread_attr_t *__attr) __THROW; 212 213 /* Set the `detachstate' attribute in *ATTR according to DETACHSTATE. */ 214 extern int pthread_attr_setdetachstate (pthread_attr_t *__attr, 215 int __detachstate) __THROW; 216 217 /* Return in *DETACHSTATE the `detachstate' attribute in *ATTR. */ 218 extern int pthread_attr_getdetachstate (const pthread_attr_t *__attr, 219 int *__detachstate) __THROW; 220 221 /* Set scheduling parameters (priority, etc) in *ATTR according to PARAM. */ 222 extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr, 223 const struct sched_param *__restrict 224 __param) __THROW; 225 226 /* Return in *PARAM the scheduling parameters of *ATTR. */ 227 extern int pthread_attr_getschedparam (const pthread_attr_t *__restrict 228 __attr, 229 struct sched_param *__restrict __param) 230 __THROW; 231 232 /* Set scheduling policy in *ATTR according to POLICY. */ 233 extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy) 234 __THROW; 235 236 /* Return in *POLICY the scheduling policy of *ATTR. */ 237 extern int pthread_attr_getschedpolicy (const pthread_attr_t *__restrict 238 __attr, int *__restrict __policy) 239 __THROW; 240 241 /* Set scheduling inheritance mode in *ATTR according to INHERIT. */ 242 extern int pthread_attr_setinheritsched (pthread_attr_t *__attr, 243 int __inherit) __THROW; 244 245 /* Return in *INHERIT the scheduling inheritance mode of *ATTR. */ 246 extern int pthread_attr_getinheritsched (const pthread_attr_t *__restrict 247 __attr, int *__restrict __inherit) 248 __THROW; 249 250 /* Set scheduling contention scope in *ATTR according to SCOPE. */ 251 extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope) 252 __THROW; 253 254 /* Return in *SCOPE the scheduling contention scope of *ATTR. */ 255 extern int pthread_attr_getscope (const pthread_attr_t *__restrict __attr, 256 int *__restrict __scope) __THROW; 257 258 /* Set the size of the guard area at the bottom of the thread. */ 259 extern int pthread_attr_setguardsize (pthread_attr_t *__attr, 260 size_t __guardsize) __THROW; 261 262 /* Get the size of the guard area at the bottom of the thread. */ 263 extern int pthread_attr_getguardsize (const pthread_attr_t *__restrict 264 __attr, size_t *__restrict __guardsize) 265 __THROW; 266 267 #if 0 /* uClibc: deprecated stuff disabled. def __UCLIBC_SUSV3_LEGACY__ */ 268 /* Set the starting address of the stack of the thread to be created. 269 Depending on whether the stack grows up or down the value must either 270 be higher or lower than all the address in the memory block. The 271 minimal size of the block must be PTHREAD_STACK_SIZE. */ 272 extern int pthread_attr_setstackaddr (pthread_attr_t *__attr, 273 void *__stackaddr) __THROW; 274 275 /* Return the previously set address for the stack. */ 276 extern int pthread_attr_getstackaddr (const pthread_attr_t *__restrict 277 __attr, void **__restrict __stackaddr) 278 __THROW; 279 #endif 280 281 #ifdef __USE_XOPEN2K 282 /* The following two interfaces are intended to replace the last two. They 283 require setting the address as well as the size since only setting the 284 address will make the implementation on some architectures impossible. */ 285 extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, 286 size_t __stacksize) __THROW; 287 288 /* Return the previously set address for the stack. */ 289 extern int pthread_attr_getstack (const pthread_attr_t *__restrict __attr, 290 void **__restrict __stackaddr, 291 size_t *__restrict __stacksize) __THROW; 292 #endif 293 294 /* Add information about the minimum stack size needed for the thread 295 to be started. This size must never be less than PTHREAD_STACK_SIZE 296 and must also not exceed the system limits. */ 297 extern int pthread_attr_setstacksize (pthread_attr_t *__attr, 298 size_t __stacksize) __THROW; 299 300 /* Return the currently used minimal stack size. */ 301 extern int pthread_attr_getstacksize (const pthread_attr_t *__restrict 302 __attr, size_t *__restrict __stacksize) 303 __THROW; 304 305 #if 0 306 /* Not yet implemented in uClibc! */ 307 308 #ifdef __USE_GNU 309 /* Initialize thread attribute *ATTR with attributes corresponding to the 310 already running thread TH. It shall be called on uninitialized ATTR 311 and destroyed with pthread_attr_destroy when no longer needed. */ 312 extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr) __THROW; 313 #endif 314 #endif 315 316 /* Functions for scheduling control. */ 317 318 /* Set the scheduling parameters for TARGET_THREAD according to POLICY 319 and *PARAM. */ 320 extern int pthread_setschedparam (pthread_t __target_thread, int __policy, 321 const struct sched_param *__param) 322 __THROW; 323 324 /* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */ 325 extern int pthread_getschedparam (pthread_t __target_thread, 326 int *__restrict __policy, 327 struct sched_param *__restrict __param) 328 __THROW; 329 330 #ifdef __USE_UNIX98 331 /* Determine level of concurrency. */ 332 extern int pthread_getconcurrency (void) __THROW; 333 334 /* Set new concurrency level to LEVEL. */ 335 extern int pthread_setconcurrency (int __level) __THROW; 336 #endif 337 338 #ifdef __USE_GNU 339 /* Same thing, different name */ 340 #define pthread_yield() sched_yield() 341 #endif 342 343 /* Functions for mutex handling. */ 344 345 /* Initialize MUTEX using attributes in *MUTEX_ATTR, or use the 346 default values if later is NULL. */ 347 extern int pthread_mutex_init (pthread_mutex_t *__restrict __mutex, 348 const pthread_mutexattr_t *__restrict 349 __mutex_attr) __THROW; 350 351 /* Destroy MUTEX. */ 352 extern int pthread_mutex_destroy (pthread_mutex_t *__mutex) __THROW; 353 354 /* Try to lock MUTEX. */ 355 extern int pthread_mutex_trylock (pthread_mutex_t *__mutex) __THROWNL; 356 357 /* Wait until lock for MUTEX becomes available and lock it. */ 358 extern int pthread_mutex_lock (pthread_mutex_t *__mutex) __THROWNL; 359 360 #ifdef __USE_XOPEN2K 361 /* Wait until lock becomes available, or specified time passes. */ 362 extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex, 363 const struct timespec *__restrict 364 __abstime) __THROWNL; 365 #endif 366 367 /* Unlock MUTEX. */ 368 extern int pthread_mutex_unlock (pthread_mutex_t *__mutex) __THROWNL; 369 370 371 /* Functions for handling mutex attributes. */ 372 373 /* Initialize mutex attribute object ATTR with default attributes 374 (kind is PTHREAD_MUTEX_TIMED_NP). */ 375 extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr) __THROW; 376 377 /* Destroy mutex attribute object ATTR. */ 378 extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr) __THROW; 379 380 /* Get the process-shared flag of the mutex attribute ATTR. */ 381 extern int pthread_mutexattr_getpshared (const pthread_mutexattr_t * 382 __restrict __attr, 383 int *__restrict __pshared) __THROW; 384 385 /* Set the process-shared flag of the mutex attribute ATTR. */ 386 extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, 387 int __pshared) __THROW; 388 389 #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 390 /* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL, 391 PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or 392 PTHREAD_MUTEX_DEFAULT). */ 393 extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind) 394 __THROW; 395 396 /* Return in *KIND the mutex kind attribute in *ATTR. */ 397 extern int pthread_mutexattr_gettype (const pthread_mutexattr_t *__restrict 398 __attr, int *__restrict __kind) __THROW; 399 #endif 400 401 402 /* Functions for handling conditional variables. */ 403 404 /* Initialize condition variable COND using attributes ATTR, or use 405 the default values if later is NULL. */ 406 extern int pthread_cond_init (pthread_cond_t *__restrict __cond, 407 const pthread_condattr_t *__restrict 408 __cond_attr) __THROW; 409 libpthread_hidden_proto(pthread_cond_init) 410 411 /* Destroy condition variable COND. */ 412 extern int pthread_cond_destroy (pthread_cond_t *__cond) __THROW; 413 libpthread_hidden_proto(pthread_cond_destroy) 414 415 /* Wake up one thread waiting for condition variable COND. */ 416 extern int pthread_cond_signal (pthread_cond_t *__cond) __THROWNL; 417 libpthread_hidden_proto(pthread_cond_signal) 418 419 /* Wake up all threads waiting for condition variables COND. */ 420 extern int pthread_cond_broadcast (pthread_cond_t *__cond) __THROWNL; 421 libpthread_hidden_proto(pthread_cond_broadcast) 422 423 /* Wait for condition variable COND to be signaled or broadcast. 424 MUTEX is assumed to be locked before. */ 425 extern int pthread_cond_wait (pthread_cond_t *__restrict __cond, 426 pthread_mutex_t *__restrict __mutex); 427 libpthread_hidden_proto(pthread_cond_wait) 428 429 /* Wait for condition variable COND to be signaled or broadcast until 430 ABSTIME. MUTEX is assumed to be locked before. ABSTIME is an 431 absolute time specification; zero is the beginning of the epoch 432 (00:00:00 GMT, January 1, 1970). */ 433 extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond, 434 pthread_mutex_t *__restrict __mutex, 435 const struct timespec *__restrict 436 __abstime); 437 libpthread_hidden_proto(pthread_cond_timedwait) 438 439 /* Functions for handling condition variable attributes. */ 440 441 /* Initialize condition variable attribute ATTR. */ 442 extern int pthread_condattr_init (pthread_condattr_t *__attr) __THROW; 443 libpthread_hidden_proto(pthread_condattr_init) 444 445 /* Destroy condition variable attribute ATTR. */ 446 extern int pthread_condattr_destroy (pthread_condattr_t *__attr) __THROW; 447 libpthread_hidden_proto(pthread_condattr_destroy) 448 449 /* Get the process-shared flag of the condition variable attribute ATTR. */ 450 extern int pthread_condattr_getpshared (const pthread_condattr_t * 451 __restrict __attr, 452 int *__restrict __pshared) __THROW; 453 454 /* Set the process-shared flag of the condition variable attribute ATTR. */ 455 extern int pthread_condattr_setpshared (pthread_condattr_t *__attr, 456 int __pshared) __THROW; 457 458 #ifdef __USE_XOPEN2K 459 /* Get the clock selected for the condition variable attribute ATTR. */ 460 extern int pthread_condattr_getclock (const pthread_condattr_t * 461 __restrict __attr, 462 __clockid_t *__restrict __clock_id) 463 __THROW __nonnull ((1, 2)); 464 465 /* Set the clock selected for the condition variable attribute ATTR. */ 466 extern int pthread_condattr_setclock (pthread_condattr_t *__attr, 467 __clockid_t __clock_id) 468 __THROW __nonnull ((1)); 469 #endif 470 471 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 472 /* Functions for handling read-write locks. */ 473 474 /* Initialize read-write lock RWLOCK using attributes ATTR, or use 475 the default values if later is NULL. */ 476 extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock, 477 const pthread_rwlockattr_t *__restrict 478 __attr) __THROW; 479 480 /* Destroy read-write lock RWLOCK. */ 481 extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock) __THROW; 482 483 /* Acquire read lock for RWLOCK. */ 484 extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock) __THROWNL; 485 486 /* Try to acquire read lock for RWLOCK. */ 487 extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) __THROWNL; 488 489 # ifdef __USE_XOPEN2K 490 /* Try to acquire read lock for RWLOCK or return after specfied time. */ 491 extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, 492 const struct timespec *__restrict 493 __abstime) __THROWNL; 494 # endif 495 496 /* Acquire write lock for RWLOCK. */ 497 extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) __THROWNL; 498 499 /* Try to acquire write lock for RWLOCK. */ 500 extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock) __THROWNL; 501 502 # ifdef __USE_XOPEN2K 503 /* Try to acquire write lock for RWLOCK or return after specfied time. */ 504 extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, 505 const struct timespec *__restrict 506 __abstime) __THROWNL; 507 # endif 508 509 /* Unlock RWLOCK. */ 510 extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock) __THROWNL; 511 512 513 /* Functions for handling read-write lock attributes. */ 514 515 /* Initialize attribute object ATTR with default values. */ 516 extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr) __THROW; 517 518 /* Destroy attribute object ATTR. */ 519 extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr) __THROW; 520 521 /* Return current setting of process-shared attribute of ATTR in PSHARED. */ 522 extern int pthread_rwlockattr_getpshared (const pthread_rwlockattr_t * 523 __restrict __attr, 524 int *__restrict __pshared) __THROW; 525 526 /* Set process-shared attribute of ATTR to PSHARED. */ 527 extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr, 528 int __pshared) __THROW; 529 530 /* Return current setting of reader/writer preference. */ 531 extern int pthread_rwlockattr_getkind_np (const pthread_rwlockattr_t *__attr, 532 int *__pref) __THROW; 533 534 /* Set reader/write preference. */ 535 extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr, 536 int __pref) __THROW; 537 #endif 538 539 #if 0 540 /* Not yet implemented in uClibc! */ 541 542 #ifdef __USE_XOPEN2K 543 /* The IEEE Std. 1003.1j-2000 introduces functions to implement 544 spinlocks. */ 545 546 /* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can 547 be shared between different processes. */ 548 extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared) 549 __THROW; 550 551 /* Destroy the spinlock LOCK. */ 552 extern int pthread_spin_destroy (pthread_spinlock_t *__lock) __THROW; 553 554 /* Wait until spinlock LOCK is retrieved. */ 555 extern int pthread_spin_lock (pthread_spinlock_t *__lock) __THROWNL; 556 557 /* Try to lock spinlock LOCK. */ 558 extern int pthread_spin_trylock (pthread_spinlock_t *__lock) __THROWNL; 559 560 /* Release spinlock LOCK. */ 561 extern int pthread_spin_unlock (pthread_spinlock_t *__lock) __THROWNL; 562 563 564 /* Barriers are a also a new feature in 1003.1j-2000. */ 565 566 extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier, 567 const pthread_barrierattr_t *__restrict 568 __attr, unsigned int __count) __THROW; 569 570 extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) __THROW; 571 572 extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) __THROW; 573 574 extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) __THROW; 575 576 extern int pthread_barrierattr_getpshared (const pthread_barrierattr_t * 577 __restrict __attr, 578 int *__restrict __pshared) __THROW; 579 580 extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr, 581 int __pshared) __THROW; 582 583 extern int pthread_barrier_wait (pthread_barrier_t *__barrier) __THROWNL; 584 #endif 585 #endif 586 587 588 /* Functions for handling thread-specific data. */ 589 590 /* Create a key value identifying a location in the thread-specific 591 data area. Each thread maintains a distinct thread-specific data 592 area. DESTR_FUNCTION, if non-NULL, is called with the value 593 associated to that key when the key is destroyed. 594 DESTR_FUNCTION is not called if the value associated is NULL when 595 the key is destroyed. */ 596 extern int pthread_key_create (pthread_key_t *__key, 597 void (*__destr_function) (void *)) __THROW; 598 599 /* Destroy KEY. */ 600 extern int pthread_key_delete (pthread_key_t __key) __THROW; 601 602 /* Store POINTER in the thread-specific data slot identified by KEY. */ 603 extern int pthread_setspecific (pthread_key_t __key, 604 const void *__pointer) __THROW; 605 606 /* Return current value of the thread-specific data slot identified by KEY. */ 607 extern void *pthread_getspecific (pthread_key_t __key) __THROW; 608 609 610 /* Functions for handling initialization. */ 611 612 /* Guarantee that the initialization function INIT_ROUTINE will be called 613 only once, even if pthread_once is executed several times with the 614 same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or 615 extern variable initialized to PTHREAD_ONCE_INIT. 616 617 The initialization functions might throw exception which is why 618 this function is not marked with __THROW. */ 619 extern int pthread_once (pthread_once_t *__once_control, 620 void (*__init_routine) (void)); 621 622 623 /* Functions for handling cancellation. */ 624 625 /* Set cancelability state of current thread to STATE, returning old 626 state in *OLDSTATE if OLDSTATE is not NULL. */ 627 extern int pthread_setcancelstate (int __state, int *__oldstate); 628 629 /* Set cancellation state of current thread to TYPE, returning the old 630 type in *OLDTYPE if OLDTYPE is not NULL. */ 631 extern int pthread_setcanceltype (int __type, int *__oldtype); 632 633 /* Cancel THREAD immediately or at the next possibility. */ 634 extern int pthread_cancel (pthread_t __cancelthread); 635 636 /* Test for pending cancellation for the current thread and terminate 637 the thread as per pthread_exit(PTHREAD_CANCELED) if it has been 638 cancelled. */ 639 extern void pthread_testcancel (void); 640 641 642 /* Install a cleanup handler: ROUTINE will be called with arguments ARG 643 when the thread is cancelled or calls pthread_exit. ROUTINE will also 644 be called with arguments ARG when the matching pthread_cleanup_pop 645 is executed with non-zero EXECUTE argument. 646 pthread_cleanup_push and pthread_cleanup_pop are macros and must always 647 be used in matching pairs at the same nesting level of braces. */ 648 649 #define pthread_cleanup_push(routine,arg) \ 650 { struct _pthread_cleanup_buffer _buffer; \ 651 _pthread_cleanup_push (&_buffer, (routine), (arg)); 652 653 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer, 654 void (*__routine) (void *), 655 void *__arg) __THROW; 656 657 /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 658 If EXECUTE is non-zero, the handler function is called. */ 659 660 #define pthread_cleanup_pop(execute) \ 661 _pthread_cleanup_pop (&_buffer, (execute)); } 662 663 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer, 664 int __execute) __THROW; 665 666 /* Install a cleanup handler as pthread_cleanup_push does, but also 667 saves the current cancellation type and set it to deferred cancellation. */ 668 669 #ifdef __USE_GNU 670 # define pthread_cleanup_push_defer_np(routine,arg) \ 671 { struct _pthread_cleanup_buffer _buffer; \ 672 _pthread_cleanup_push_defer (&_buffer, (routine), (arg)); 673 674 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer, 675 void (*__routine) (void *), 676 void *__arg) __THROW; 677 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer, 678 void (*__routine) (void *), 679 void *__arg) __THROW; 680 681 /* Remove a cleanup handler as pthread_cleanup_pop does, but also 682 restores the cancellation type that was in effect when the matching 683 pthread_cleanup_push_defer was called. */ 684 685 # define pthread_cleanup_pop_restore_np(execute) \ 686 _pthread_cleanup_pop_restore (&_buffer, (execute)); } 687 688 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer, 689 int __execute) __THROW; 690 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer, 691 int __execute) __THROW; 692 #endif 693 694 695 #if 0 696 /* Not yet implemented in uClibc! */ 697 698 #ifdef __USE_XOPEN2K 699 /* Get ID of CPU-time clock for thread THREAD_ID. */ 700 extern int pthread_getcpuclockid (pthread_t __thread_id, 701 clockid_t *__clock_id) __THROW; 702 #endif 703 #endif 704 705 706 /* Functions for handling signals. */ 707 #include <bits/sigthread.h> 708 709 710 /* Functions for handling process creation and process execution. */ 711 712 #ifdef __ARCH_USE_MMU__ 713 /* Install handlers to be called when a new process is created with FORK. 714 The PREPARE handler is called in the parent process just before performing 715 FORK. The PARENT handler is called in the parent process just after FORK. 716 The CHILD handler is called in the child process. Each of the three 717 handlers can be NULL, meaning that no handler needs to be called at that 718 point. 719 PTHREAD_ATFORK can be called several times, in which case the PREPARE 720 handlers are called in LIFO order (last added with PTHREAD_ATFORK, 721 first called before FORK), and the PARENT and CHILD handlers are called 722 in FIFO (first added, first called). */ 723 724 extern int pthread_atfork (void (*__prepare) (void), 725 void (*__parent) (void), 726 void (*__child) (void)) __THROW; 727 #endif 728 729 /* Terminate all threads in the program except the calling process. 730 Should be called just before invoking one of the exec*() functions. */ 731 732 extern void pthread_kill_other_threads_np (void) __THROW; 733 734 __END_DECLS 735 736 #endif /* pthread.h */ 737