release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/sysroot/usr/include/pthread.h

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