1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 2 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library 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 GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #ifndef _PTHREAD_H 21 #define _PTHREAD_H 1 22 23 #include <features.h> 24 #include <endian.h> 25 #include <sched.h> 26 #include <time.h> 27 28 #define __need_sigset_t 29 #include <signal.h> 30 #include <bits/pthreadtypes.h> 31 #include <bits/setjmp.h> 32 #include <bits/wordsize.h> 33 34 35 /* Detach state. */ 36 enum 37 { 38 PTHREAD_CREATE_JOINABLE, 39 #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_JOINABLE 40 PTHREAD_CREATE_DETACHED 41 #define PTHREAD_CREATE_DETACHED PTHREAD_CREATE_DETACHED 42 }; 43 44 45 /* Mutex types. */ 46 enum 47 { 48 PTHREAD_MUTEX_TIMED_NP, 49 PTHREAD_MUTEX_RECURSIVE_NP, 50 PTHREAD_MUTEX_ERRORCHECK_NP, 51 PTHREAD_MUTEX_ADAPTIVE_NP 52 #ifdef __USE_UNIX98 53 , 54 PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP, 55 PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP, 56 PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP, 57 PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL 58 #endif 59 #ifdef __USE_GNU 60 /* For compatibility. */ 61 , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_TIMED_NP 62 #endif 63 }; 64 65 66 #ifdef __USE_XOPEN2K 67 /* Robust mutex or not flags. */ 68 enum 69 { 70 PTHREAD_MUTEX_STALLED, 71 PTHREAD_MUTEX_STALLED_NP = PTHREAD_MUTEX_STALLED, 72 PTHREAD_MUTEX_ROBUST, 73 PTHREAD_MUTEX_ROBUST_NP = PTHREAD_MUTEX_ROBUST 74 }; 75 #endif 76 77 78 #ifdef __USE_UNIX98 79 /* Mutex protocols. */ 80 enum 81 { 82 PTHREAD_PRIO_NONE, 83 PTHREAD_PRIO_INHERIT, 84 PTHREAD_PRIO_PROTECT 85 }; 86 #endif 87 88 89 /* Mutex initializers. */ 90 #if __WORDSIZE == 64 91 # define PTHREAD_MUTEX_INITIALIZER \ 92 { { 0, 0, 0, 0, 0, 0, { 0, 0 } } } 93 # ifdef __USE_GNU 94 # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ 95 { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0, 0 } } } 96 # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ 97 { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0, 0 } } } 98 # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ 99 { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0, 0 } } } 100 # endif 101 #else 102 # define PTHREAD_MUTEX_INITIALIZER \ 103 { { 0, 0, 0, 0, 0, { 0 } } } 104 # ifdef __USE_GNU 105 # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ 106 { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0 } } } 107 # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ 108 { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0 } } } 109 # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ 110 { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0 } } } 111 # endif 112 #endif 113 114 115 /* Read-write lock types. */ 116 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 117 enum 118 { 119 PTHREAD_RWLOCK_PREFER_READER_NP, 120 PTHREAD_RWLOCK_PREFER_WRITER_NP, 121 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 122 PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP 123 }; 124 125 /* Read-write lock initializers. */ 126 # define PTHREAD_RWLOCK_INITIALIZER \ 127 { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } 128 # ifdef __USE_GNU 129 # if __WORDSIZE == 64 130 # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 131 { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 132 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } } 133 # else 134 # if __BYTE_ORDER == __LITTLE_ENDIAN 135 # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 136 { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, \ 137 0, 0, 0, 0 } } 138 # else 139 # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 140 { { 0, 0, 0, 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,\ 141 0 } } 142 # endif 143 # endif 144 # endif 145 #endif /* Unix98 or XOpen2K */ 146 147 148 /* Scheduler inheritance. */ 149 enum 150 { 151 PTHREAD_INHERIT_SCHED, 152 #define PTHREAD_INHERIT_SCHED PTHREAD_INHERIT_SCHED 153 PTHREAD_EXPLICIT_SCHED 154 #define PTHREAD_EXPLICIT_SCHED PTHREAD_EXPLICIT_SCHED 155 }; 156 157 158 /* Scope handling. */ 159 enum 160 { 161 PTHREAD_SCOPE_SYSTEM, 162 #define PTHREAD_SCOPE_SYSTEM PTHREAD_SCOPE_SYSTEM 163 PTHREAD_SCOPE_PROCESS 164 #define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_PROCESS 165 }; 166 167 168 /* Process shared or private flag. */ 169 enum 170 { 171 PTHREAD_PROCESS_PRIVATE, 172 #define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE 173 PTHREAD_PROCESS_SHARED 174 #define PTHREAD_PROCESS_SHARED PTHREAD_PROCESS_SHARED 175 }; 176 177 178 179 /* Conditional variable handling. */ 180 #define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } } 181 182 183 /* Cleanup buffers */ 184 struct _pthread_cleanup_buffer 185 { 186 void (*__routine) (void *); /* Function to call. */ 187 void *__arg; /* Its argument. */ 188 int __canceltype; /* Saved cancellation type. */ 189 struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions. */ 190 }; 191 192 /* Cancellation */ 193 enum 194 { 195 PTHREAD_CANCEL_ENABLE, 196 #define PTHREAD_CANCEL_ENABLE PTHREAD_CANCEL_ENABLE 197 PTHREAD_CANCEL_DISABLE 198 #define PTHREAD_CANCEL_DISABLE PTHREAD_CANCEL_DISABLE 199 }; 200 enum 201 { 202 PTHREAD_CANCEL_DEFERRED, 203 #define PTHREAD_CANCEL_DEFERRED PTHREAD_CANCEL_DEFERRED 204 PTHREAD_CANCEL_ASYNCHRONOUS 205 #define PTHREAD_CANCEL_ASYNCHRONOUS PTHREAD_CANCEL_ASYNCHRONOUS 206 }; 207 #define PTHREAD_CANCELED ((void *) -1) 208 209 210 /* Single execution handling. */ 211 #define PTHREAD_ONCE_INIT 0 212 213 214 #ifdef __USE_XOPEN2K 215 /* Value returned by 'pthread_barrier_wait' for one of the threads after 216 the required number of threads have called this function. 217 -1 is distinct from 0 and all errno constants */ 218 # define PTHREAD_BARRIER_SERIAL_THREAD -1 219 #endif 220 221 222 __BEGIN_DECLS 223 224 /* Create a new thread, starting with execution of START-ROUTINE 225 getting passed ARG. Creation attributed come from ATTR. The new 226 handle is stored in *NEWTHREAD. */ 227 extern int pthread_create (pthread_t *__restrict __newthread, 228 __const pthread_attr_t *__restrict __attr, 229 void *(*__start_routine) (void *), 230 void *__restrict __arg) __THROW __nonnull ((1, 3)); 231 232 /* Terminate calling thread. 233 234 The registered cleanup handlers are called via exception handling 235 so we cannot mark this function with __THROW.*/ 236 extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__)); 237 238 /* Make calling thread wait for termination of the thread TH. The 239 exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN 240 is not NULL. 241 242 This function is a cancellation point and therefore not marked with 243 __THROW. */ 244 extern int pthread_join (pthread_t __th, void **__thread_return); 245 246 #ifdef __USE_GNU 247 /* Check whether thread TH has terminated. If yes return the status of 248 the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL. */ 249 extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW; 250 251 /* Make calling thread wait for termination of the thread TH, but only 252 until TIMEOUT. The exit status of the thread is stored in 253 *THREAD_RETURN, if THREAD_RETURN is not NULL. 254 255 This function is a cancellation point and therefore not marked with 256 __THROW. */ 257 extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return, 258 __const struct timespec *__abstime); 259 #endif 260 261 /* Indicate that the thread TH is never to be joined with PTHREAD_JOIN. 262 The resources of TH will therefore be freed immediately when it 263 terminates, instead of waiting for another thread to perform PTHREAD_JOIN 264 on it. */ 265 extern int pthread_detach (pthread_t __th) __THROW; 266 267 268 /* Obtain the identifier of the current thread. */ 269 extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__)); 270 271 /* Compare two thread identifiers. */ 272 extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW; 273 274 275 /* Thread attribute handling. */ 276 277 /* Initialize thread attribute *ATTR with default attributes 278 (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER, 279 no user-provided stack). */ 280 extern int pthread_attr_init (pthread_attr_t *__attr) __THROW __nonnull ((1)); 281 282 /* Destroy thread attribute *ATTR. */ 283 extern int pthread_attr_destroy (pthread_attr_t *__attr) 284 __THROW __nonnull ((1)); 285 286 /* Get detach state attribute. */ 287 extern int pthread_attr_getdetachstate (__const pthread_attr_t *__attr, 288 int *__detachstate) 289 __THROW __nonnull ((1, 2)); 290 291 /* Set detach state attribute. */ 292 extern int pthread_attr_setdetachstate (pthread_attr_t *__attr, 293 int __detachstate) 294 __THROW __nonnull ((1)); 295 296 297 /* Get the size of the guard area created for stack overflow protection. */ 298 extern int pthread_attr_getguardsize (__const pthread_attr_t *__attr, 299 size_t *__guardsize) 300 __THROW __nonnull ((1, 2)); 301 302 /* Set the size of the guard area created for stack overflow protection. */ 303 extern int pthread_attr_setguardsize (pthread_attr_t *__attr, 304 size_t __guardsize) 305 __THROW __nonnull ((1)); 306 307 308 /* Return in *PARAM the scheduling parameters of *ATTR. */ 309 extern int pthread_attr_getschedparam (__const pthread_attr_t *__restrict 310 __attr, 311 struct sched_param *__restrict __param) 312 __THROW __nonnull ((1, 2)); 313 314 /* Set scheduling parameters (priority, etc) in *ATTR according to PARAM. */ 315 extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr, 316 __const struct sched_param *__restrict 317 __param) __THROW __nonnull ((1, 2)); 318 319 /* Return in *POLICY the scheduling policy of *ATTR. */ 320 extern int pthread_attr_getschedpolicy (__const pthread_attr_t *__restrict 321 __attr, int *__restrict __policy) 322 __THROW __nonnull ((1, 2)); 323 324 /* Set scheduling policy in *ATTR according to POLICY. */ 325 extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy) 326 __THROW __nonnull ((1)); 327 328 /* Return in *INHERIT the scheduling inheritance mode of *ATTR. */ 329 extern int pthread_attr_getinheritsched (__const pthread_attr_t *__restrict 330 __attr, int *__restrict __inherit) 331 __THROW __nonnull ((1, 2)); 332 333 /* Set scheduling inheritance mode in *ATTR according to INHERIT. */ 334 extern int pthread_attr_setinheritsched (pthread_attr_t *__attr, 335 int __inherit) 336 __THROW __nonnull ((1)); 337 338 339 /* Return in *SCOPE the scheduling contention scope of *ATTR. */ 340 extern int pthread_attr_getscope (__const pthread_attr_t *__restrict __attr, 341 int *__restrict __scope) 342 __THROW __nonnull ((1, 2)); 343 344 /* Set scheduling contention scope in *ATTR according to SCOPE. */ 345 extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope) 346 __THROW __nonnull ((1)); 347 348 /* Return the previously set address for the stack. */ 349 extern int pthread_attr_getstackaddr (__const pthread_attr_t *__restrict 350 __attr, void **__restrict __stackaddr) 351 __THROW __nonnull ((1, 2)) __attribute_deprecated__; 352 353 /* Set the starting address of the stack of the thread to be created. 354 Depending on whether the stack grows up or down the value must either 355 be higher or lower than all the address in the memory block. The 356 minimal size of the block must be PTHREAD_STACK_MIN. */ 357 extern int pthread_attr_setstackaddr (pthread_attr_t *__attr, 358 void *__stackaddr) 359 __THROW __nonnull ((1)) __attribute_deprecated__; 360 361 /* Return the currently used minimal stack size. */ 362 extern int pthread_attr_getstacksize (__const pthread_attr_t *__restrict 363 __attr, size_t *__restrict __stacksize) 364 __THROW __nonnull ((1, 2)); 365 366 /* Add information about the minimum stack size needed for the thread 367 to be started. This size must never be less than PTHREAD_STACK_MIN 368 and must also not exceed the system limits. */ 369 extern int pthread_attr_setstacksize (pthread_attr_t *__attr, 370 size_t __stacksize) 371 __THROW __nonnull ((1)); 372 373 #ifdef __USE_XOPEN2K 374 /* Return the previously set address for the stack. */ 375 extern int pthread_attr_getstack (__const pthread_attr_t *__restrict __attr, 376 void **__restrict __stackaddr, 377 size_t *__restrict __stacksize) 378 __THROW __nonnull ((1, 2, 3)); 379 380 /* The following two interfaces are intended to replace the last two. They 381 require setting the address as well as the size since only setting the 382 address will make the implementation on some architectures impossible. */ 383 extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, 384 size_t __stacksize) __THROW __nonnull ((1)); 385 #endif 386 387 #ifdef __USE_GNU 388 /* Thread created with attribute ATTR will be limited to run only on 389 the processors represented in CPUSET. */ 390 extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, 391 size_t __cpusetsize, 392 __const cpu_set_t *__cpuset) 393 __THROW __nonnull ((1, 3)); 394 395 /* Get bit set in CPUSET representing the processors threads created with 396 ATTR can run on. */ 397 extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr, 398 size_t __cpusetsize, 399 cpu_set_t *__cpuset) 400 __THROW __nonnull ((1, 3)); 401 402 403 /* Initialize thread attribute *ATTR with attributes corresponding to the 404 already running thread TH. It shall be called on uninitialized ATTR 405 and destroyed with pthread_attr_destroy when no longer needed. */ 406 extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr) 407 __THROW __nonnull ((2)); 408 #endif 409 410 411 /* Functions for scheduling control. */ 412 413 /* Set the scheduling parameters for TARGET_THREAD according to POLICY 414 and *PARAM. */ 415 extern int pthread_setschedparam (pthread_t __target_thread, int __policy, 416 __const struct sched_param *__param) 417 __THROW __nonnull ((3)); 418 419 /* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */ 420 extern int pthread_getschedparam (pthread_t __target_thread, 421 int *__restrict __policy, 422 struct sched_param *__restrict __param) 423 __THROW __nonnull ((2, 3)); 424 425 /* Set the scheduling priority for TARGET_THREAD. */ 426 extern int pthread_setschedprio (pthread_t __target_thread, int __prio) 427 __THROW; 428 429 430 #ifdef __USE_UNIX98 431 /* Determine level of concurrency. */ 432 extern int pthread_getconcurrency (void) __THROW; 433 434 /* Set new concurrency level to LEVEL. */ 435 extern int pthread_setconcurrency (int __level) __THROW; 436 #endif 437 438 #ifdef __USE_GNU 439 /* Yield the processor to another thread or process. 440 This function is similar to the POSIX `sched_yield' function but 441 might be differently implemented in the case of a m-on-n thread 442 implementation. */ 443 extern int pthread_yield (void) __THROW; 444 445 446 /* Limit specified thread TH to run only on the processors represented 447 in CPUSET. */ 448 extern int pthread_setaffinity_np (pthread_t __th, size_t __cpusetsize, 449 __const cpu_set_t *__cpuset) 450 __THROW __nonnull ((3)); 451 452 /* Get bit set in CPUSET representing the processors TH can run on. */ 453 extern int pthread_getaffinity_np (pthread_t __th, size_t __cpusetsize, 454 cpu_set_t *__cpuset) 455 __THROW __nonnull ((3)); 456 #endif 457 458 459 /* Functions for handling initialization. */ 460 461 /* Guarantee that the initialization function INIT_ROUTINE will be called 462 only once, even if pthread_once is executed several times with the 463 same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or 464 extern variable initialized to PTHREAD_ONCE_INIT. 465 466 The initialization functions might throw exception which is why 467 this function is not marked with __THROW. */ 468 extern int pthread_once (pthread_once_t *__once_control, 469 void (*__init_routine) (void)) __nonnull ((1, 2)); 470 471 472 /* Functions for handling cancellation. 473 474 Note that these functions are explicitly not marked to not throw an 475 exception in C++ code. If cancellation is implemented by unwinding 476 this is necessary to have the compiler generate the unwind information. */ 477 478 /* Set cancelability state of current thread to STATE, returning old 479 state in *OLDSTATE if OLDSTATE is not NULL. */ 480 extern int pthread_setcancelstate (int __state, int *__oldstate); 481 482 /* Set cancellation state of current thread to TYPE, returning the old 483 type in *OLDTYPE if OLDTYPE is not NULL. */ 484 extern int pthread_setcanceltype (int __type, int *__oldtype); 485 486 /* Cancel THREAD immediately or at the next possibility. */ 487 extern int pthread_cancel (pthread_t __th); 488 489 /* Test for pending cancellation for the current thread and terminate 490 the thread as per pthread_exit(PTHREAD_CANCELED) if it has been 491 cancelled. */ 492 extern void pthread_testcancel (void); 493 494 495 /* Cancellation handling with integration into exception handling. */ 496 497 typedef struct 498 { 499 struct 500 { 501 __jmp_buf __cancel_jmp_buf; 502 int __mask_was_saved; 503 } __cancel_jmp_buf[1]; 504 void *__pad[4]; 505 } __pthread_unwind_buf_t __attribute__ ((__aligned__)); 506 507 /* No special attributes by default. */ 508 #ifndef __cleanup_fct_attribute 509 # define __cleanup_fct_attribute 510 #endif 511 512 513 /* Structure to hold the cleanup handler information. */ 514 struct __pthread_cleanup_frame 515 { 516 void (*__cancel_routine) (void *); 517 void *__cancel_arg; 518 int __do_it; 519 int __cancel_type; 520 }; 521 522 #if defined __GNUC__ && defined __EXCEPTIONS 523 # ifdef __cplusplus 524 /* Class to handle cancellation handler invocation. */ 525 class __pthread_cleanup_class 526 { 527 void (*__cancel_routine) (void *); 528 void *__cancel_arg; 529 int __do_it; 530 int __cancel_type; 531 532 public: 533 __pthread_cleanup_class (void (*__fct) (void *), void *__arg) 534 : __cancel_routine (__fct), __cancel_arg (__arg), __do_it (1) { } 535 ~__pthread_cleanup_class () { if (__do_it) __cancel_routine (__cancel_arg); } 536 void __setdoit (int __newval) { __do_it = __newval; } 537 void __defer () { pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, 538 &__cancel_type); } 539 void __restore () const { pthread_setcanceltype (__cancel_type, 0); } 540 }; 541 542 /* Install a cleanup handler: ROUTINE will be called with arguments ARG 543 when the thread is canceled or calls pthread_exit. ROUTINE will also 544 be called with arguments ARG when the matching pthread_cleanup_pop 545 is executed with non-zero EXECUTE argument. 546 547 pthread_cleanup_push and pthread_cleanup_pop are macros and must always 548 be used in matching pairs at the same nesting level of braces. */ 549 # define pthread_cleanup_push(routine, arg) \ 550 do { \ 551 __pthread_cleanup_class __clframe (routine, arg) 552 553 /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 554 If EXECUTE is non-zero, the handler function is called. */ 555 # define pthread_cleanup_pop(execute) \ 556 __clframe.__setdoit (execute); \ 557 } while (0) 558 559 # ifdef __USE_GNU 560 /* Install a cleanup handler as pthread_cleanup_push does, but also 561 saves the current cancellation type and sets it to deferred 562 cancellation. */ 563 # define pthread_cleanup_push_defer_np(routine, arg) \ 564 do { \ 565 __pthread_cleanup_class __clframe (routine, arg); \ 566 __clframe.__defer () 567 568 /* Remove a cleanup handler as pthread_cleanup_pop does, but also 569 restores the cancellation type that was in effect when the matching 570 pthread_cleanup_push_defer was called. */ 571 # define pthread_cleanup_pop_restore_np(execute) \ 572 __clframe.__restore (); \ 573 __clframe.__setdoit (execute); \ 574 } while (0) 575 # endif 576 # else 577 /* Function called to call the cleanup handler. As an extern inline 578 function the compiler is free to decide inlining the change when 579 needed or fall back on the copy which must exist somewhere 580 else. */ 581 __extern_inline void 582 __pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame) 583 { 584 if (__frame->__do_it) 585 __frame->__cancel_routine (__frame->__cancel_arg); 586 } 587 588 /* Install a cleanup handler: ROUTINE will be called with arguments ARG 589 when the thread is canceled or calls pthread_exit. ROUTINE will also 590 be called with arguments ARG when the matching pthread_cleanup_pop 591 is executed with non-zero EXECUTE argument. 592 593 pthread_cleanup_push and pthread_cleanup_pop are macros and must always 594 be used in matching pairs at the same nesting level of braces. */ 595 # define pthread_cleanup_push(routine, arg) \ 596 do { \ 597 struct __pthread_cleanup_frame __clframe \ 598 __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ 599 = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ 600 .__do_it = 1 }; 601 602 /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 603 If EXECUTE is non-zero, the handler function is called. */ 604 # define pthread_cleanup_pop(execute) \ 605 __clframe.__do_it = (execute); \ 606 } while (0) 607 608 # ifdef __USE_GNU 609 /* Install a cleanup handler as pthread_cleanup_push does, but also 610 saves the current cancellation type and sets it to deferred 611 cancellation. */ 612 # define pthread_cleanup_push_defer_np(routine, arg) \ 613 do { \ 614 struct __pthread_cleanup_frame __clframe \ 615 __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ 616 = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ 617 .__do_it = 1 }; \ 618 (void) pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, \ 619 &__clframe.__cancel_type) 620 621 /* Remove a cleanup handler as pthread_cleanup_pop does, but also 622 restores the cancellation type that was in effect when the matching 623 pthread_cleanup_push_defer was called. */ 624 # define pthread_cleanup_pop_restore_np(execute) \ 625 (void) pthread_setcanceltype (__clframe.__cancel_type, NULL); \ 626 __clframe.__do_it = (execute); \ 627 } while (0) 628 # endif 629 # endif 630 #else 631 /* Install a cleanup handler: ROUTINE will be called with arguments ARG 632 when the thread is canceled or calls pthread_exit. ROUTINE will also 633 be called with arguments ARG when the matching pthread_cleanup_pop 634 is executed with non-zero EXECUTE argument. 635 636 pthread_cleanup_push and pthread_cleanup_pop are macros and must always 637 be used in matching pairs at the same nesting level of braces. */ 638 # define pthread_cleanup_push(routine, arg) \ 639 do { \ 640 __pthread_unwind_buf_t __cancel_buf; \ 641 void (*__cancel_routine) (void *) = (routine); \ 642 void *__cancel_arg = (arg); \ 643 int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ 644 __cancel_buf.__cancel_jmp_buf, 0); \ 645 if (__builtin_expect (not_first_call, 0)) \ 646 { \ 647 __cancel_routine (__cancel_arg); \ 648 __pthread_unwind_next (&__cancel_buf); \ 649 /* NOTREACHED */ \ 650 } \ 651 \ 652 __pthread_register_cancel (&__cancel_buf); \ 653 do { 654 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf) 655 __cleanup_fct_attribute; 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 # define pthread_cleanup_pop(execute) \ 660 do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ 661 } while (0); \ 662 __pthread_unregister_cancel (&__cancel_buf); \ 663 if (execute) \ 664 __cancel_routine (__cancel_arg); \ 665 } while (0) 666 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf) 667 __cleanup_fct_attribute; 668 669 # ifdef __USE_GNU 670 /* Install a cleanup handler as pthread_cleanup_push does, but also 671 saves the current cancellation type and sets it to deferred 672 cancellation. */ 673 # define pthread_cleanup_push_defer_np(routine, arg) \ 674 do { \ 675 __pthread_unwind_buf_t __cancel_buf; \ 676 void (*__cancel_routine) (void *) = (routine); \ 677 void *__cancel_arg = (arg); \ 678 int not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ 679 __cancel_buf.__cancel_jmp_buf, 0); \ 680 if (__builtin_expect (not_first_call, 0)) \ 681 { \ 682 __cancel_routine (__cancel_arg); \ 683 __pthread_unwind_next (&__cancel_buf); \ 684 /* NOTREACHED */ \ 685 } \ 686 \ 687 __pthread_register_cancel_defer (&__cancel_buf); \ 688 do { 689 extern void __pthread_register_cancel_defer (__pthread_unwind_buf_t *__buf) 690 __cleanup_fct_attribute; 691 692 /* Remove a cleanup handler as pthread_cleanup_pop does, but also 693 restores the cancellation type that was in effect when the matching 694 pthread_cleanup_push_defer was called. */ 695 # define pthread_cleanup_pop_restore_np(execute) \ 696 do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ 697 } while (0); \ 698 __pthread_unregister_cancel_restore (&__cancel_buf); \ 699 if (execute) \ 700 __cancel_routine (__cancel_arg); \ 701 } while (0) 702 extern void __pthread_unregister_cancel_restore (__pthread_unwind_buf_t *__buf) 703 __cleanup_fct_attribute; 704 # endif 705 706 /* Internal interface to initiate cleanup. */ 707 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf) 708 __cleanup_fct_attribute __attribute__ ((__noreturn__)) 709 # ifndef SHARED 710 __attribute__ ((__weak__)) 711 # endif 712 ; 713 #endif 714 715 /* Function used in the macros. */ 716 struct __jmp_buf_tag; 717 extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROW; 718 719 720 /* Mutex handling. */ 721 722 /* Initialize a mutex. */ 723 extern int pthread_mutex_init (pthread_mutex_t *__mutex, 724 __const pthread_mutexattr_t *__mutexattr) 725 __THROW __nonnull ((1)); 726 727 /* Destroy a mutex. */ 728 extern int pthread_mutex_destroy (pthread_mutex_t *__mutex) 729 __THROW __nonnull ((1)); 730 731 /* Try locking a mutex. */ 732 extern int pthread_mutex_trylock (pthread_mutex_t *__mutex) 733 __THROW __nonnull ((1)); 734 735 /* Lock a mutex. */ 736 extern int pthread_mutex_lock (pthread_mutex_t *__mutex) 737 __THROW __nonnull ((1)); 738 739 #ifdef __USE_XOPEN2K 740 /* Wait until lock becomes available, or specified time passes. */ 741 extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex, 742 __const struct timespec *__restrict 743 __abstime) __THROW __nonnull ((1, 2)); 744 #endif 745 746 /* Unlock a mutex. */ 747 extern int pthread_mutex_unlock (pthread_mutex_t *__mutex) 748 __THROW __nonnull ((1)); 749 750 751 #ifdef __USE_UNIX98 752 /* Get the priority ceiling of MUTEX. */ 753 extern int pthread_mutex_getprioceiling (__const pthread_mutex_t * 754 __restrict __mutex, 755 int *__restrict __prioceiling) 756 __THROW __nonnull ((1, 2)); 757 758 /* Set the priority ceiling of MUTEX to PRIOCEILING, return old 759 priority ceiling value in *OLD_CEILING. */ 760 extern int pthread_mutex_setprioceiling (pthread_mutex_t *__restrict __mutex, 761 int __prioceiling, 762 int *__restrict __old_ceiling) 763 __THROW __nonnull ((1, 3)); 764 #endif 765 766 767 #ifdef __USE_XOPEN2K8 768 /* Declare the state protected by MUTEX as consistent. */ 769 extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex) 770 __THROW __nonnull ((1)); 771 # ifdef __USE_GNU 772 extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex) 773 __THROW __nonnull ((1)); 774 # endif 775 #endif 776 777 778 /* Functions for handling mutex attributes. */ 779 780 /* Initialize mutex attribute object ATTR with default attributes 781 (kind is PTHREAD_MUTEX_TIMED_NP). */ 782 extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr) 783 __THROW __nonnull ((1)); 784 785 /* Destroy mutex attribute object ATTR. */ 786 extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr) 787 __THROW __nonnull ((1)); 788 789 /* Get the process-shared flag of the mutex attribute ATTR. */ 790 extern int pthread_mutexattr_getpshared (__const pthread_mutexattr_t * 791 __restrict __attr, 792 int *__restrict __pshared) 793 __THROW __nonnull ((1, 2)); 794 795 /* Set the process-shared flag of the mutex attribute ATTR. */ 796 extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, 797 int __pshared) 798 __THROW __nonnull ((1)); 799 800 #ifdef __USE_UNIX98 801 /* Return in *KIND the mutex kind attribute in *ATTR. */ 802 extern int pthread_mutexattr_gettype (__const pthread_mutexattr_t *__restrict 803 __attr, int *__restrict __kind) 804 __THROW __nonnull ((1, 2)); 805 806 /* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL, 807 PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or 808 PTHREAD_MUTEX_DEFAULT). */ 809 extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind) 810 __THROW __nonnull ((1)); 811 812 /* Return in *PROTOCOL the mutex protocol attribute in *ATTR. */ 813 extern int pthread_mutexattr_getprotocol (__const pthread_mutexattr_t * 814 __restrict __attr, 815 int *__restrict __protocol) 816 __THROW __nonnull ((1, 2)); 817 818 /* Set the mutex protocol attribute in *ATTR to PROTOCOL (either 819 PTHREAD_PRIO_NONE, PTHREAD_PRIO_INHERIT, or PTHREAD_PRIO_PROTECT). */ 820 extern int pthread_mutexattr_setprotocol (pthread_mutexattr_t *__attr, 821 int __protocol) 822 __THROW __nonnull ((1)); 823 824 /* Return in *PRIOCEILING the mutex prioceiling attribute in *ATTR. */ 825 extern int pthread_mutexattr_getprioceiling (__const pthread_mutexattr_t * 826 __restrict __attr, 827 int *__restrict __prioceiling) 828 __THROW __nonnull ((1, 2)); 829 830 /* Set the mutex prioceiling attribute in *ATTR to PRIOCEILING. */ 831 extern int pthread_mutexattr_setprioceiling (pthread_mutexattr_t *__attr, 832 int __prioceiling) 833 __THROW __nonnull ((1)); 834 #endif 835 836 #ifdef __USE_XOPEN2K 837 /* Get the robustness flag of the mutex attribute ATTR. */ 838 extern int pthread_mutexattr_getrobust (__const pthread_mutexattr_t *__attr, 839 int *__robustness) 840 __THROW __nonnull ((1, 2)); 841 # ifdef __USE_GNU 842 extern int pthread_mutexattr_getrobust_np (__const pthread_mutexattr_t *__attr, 843 int *__robustness) 844 __THROW __nonnull ((1, 2)); 845 # endif 846 847 /* Set the robustness flag of the mutex attribute ATTR. */ 848 extern int pthread_mutexattr_setrobust (pthread_mutexattr_t *__attr, 849 int __robustness) 850 __THROW __nonnull ((1)); 851 # ifdef __USE_GNU 852 extern int pthread_mutexattr_setrobust_np (pthread_mutexattr_t *__attr, 853 int __robustness) 854 __THROW __nonnull ((1)); 855 # endif 856 #endif 857 858 859 #if defined __USE_UNIX98 || defined __USE_XOPEN2K 860 /* Functions for handling read-write locks. */ 861 862 /* Initialize read-write lock RWLOCK using attributes ATTR, or use 863 the default values if later is NULL. */ 864 extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock, 865 __const pthread_rwlockattr_t *__restrict 866 __attr) __THROW __nonnull ((1)); 867 868 /* Destroy read-write lock RWLOCK. */ 869 extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock) 870 __THROW __nonnull ((1)); 871 872 /* Acquire read lock for RWLOCK. */ 873 extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock) 874 __THROW __nonnull ((1)); 875 876 /* Try to acquire read lock for RWLOCK. */ 877 extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) 878 __THROW __nonnull ((1)); 879 880 # ifdef __USE_XOPEN2K 881 /* Try to acquire read lock for RWLOCK or return after specfied time. */ 882 extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, 883 __const struct timespec *__restrict 884 __abstime) __THROW __nonnull ((1, 2)); 885 # endif 886 887 /* Acquire write lock for RWLOCK. */ 888 extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) 889 __THROW __nonnull ((1)); 890 891 /* Try to acquire write lock for RWLOCK. */ 892 extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock) 893 __THROW __nonnull ((1)); 894 895 # ifdef __USE_XOPEN2K 896 /* Try to acquire write lock for RWLOCK or return after specfied time. */ 897 extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, 898 __const struct timespec *__restrict 899 __abstime) __THROW __nonnull ((1, 2)); 900 # endif 901 902 /* Unlock RWLOCK. */ 903 extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock) 904 __THROW __nonnull ((1)); 905 906 907 /* Functions for handling read-write lock attributes. */ 908 909 /* Initialize attribute object ATTR with default values. */ 910 extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr) 911 __THROW __nonnull ((1)); 912 913 /* Destroy attribute object ATTR. */ 914 extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr) 915 __THROW __nonnull ((1)); 916 917 /* Return current setting of process-shared attribute of ATTR in PSHARED. */ 918 extern int pthread_rwlockattr_getpshared (__const pthread_rwlockattr_t * 919 __restrict __attr, 920 int *__restrict __pshared) 921 __THROW __nonnull ((1, 2)); 922 923 /* Set process-shared attribute of ATTR to PSHARED. */ 924 extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr, 925 int __pshared) 926 __THROW __nonnull ((1)); 927 928 /* Return current setting of reader/writer preference. */ 929 extern int pthread_rwlockattr_getkind_np (__const pthread_rwlockattr_t * 930 __restrict __attr, 931 int *__restrict __pref) 932 __THROW __nonnull ((1, 2)); 933 934 /* Set reader/write preference. */ 935 extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr, 936 int __pref) __THROW __nonnull ((1)); 937 #endif 938 939 940 /* Functions for handling conditional variables. */ 941 942 /* Initialize condition variable COND using attributes ATTR, or use 943 the default values if later is NULL. */ 944 extern int pthread_cond_init (pthread_cond_t *__restrict __cond, 945 __const pthread_condattr_t *__restrict 946 __cond_attr) __THROW __nonnull ((1)); 947 948 /* Destroy condition variable COND. */ 949 extern int pthread_cond_destroy (pthread_cond_t *__cond) 950 __THROW __nonnull ((1)); 951 952 /* Wake up one thread waiting for condition variable COND. */ 953 extern int pthread_cond_signal (pthread_cond_t *__cond) 954 __THROW __nonnull ((1)); 955 956 /* Wake up all threads waiting for condition variables COND. */ 957 extern int pthread_cond_broadcast (pthread_cond_t *__cond) 958 __THROW __nonnull ((1)); 959 960 /* Wait for condition variable COND to be signaled or broadcast. 961 MUTEX is assumed to be locked before. 962 963 This function is a cancellation point and therefore not marked with 964 __THROW. */ 965 extern int pthread_cond_wait (pthread_cond_t *__restrict __cond, 966 pthread_mutex_t *__restrict __mutex) 967 __nonnull ((1, 2)); 968 969 /* Wait for condition variable COND to be signaled or broadcast until 970 ABSTIME. MUTEX is assumed to be locked before. ABSTIME is an 971 absolute time specification; zero is the beginning of the epoch 972 (00:00:00 GMT, January 1, 1970). 973 974 This function is a cancellation point and therefore not marked with 975 __THROW. */ 976 extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond, 977 pthread_mutex_t *__restrict __mutex, 978 __const struct timespec *__restrict 979 __abstime) __nonnull ((1, 2, 3)); 980 981 /* Functions for handling condition variable attributes. */ 982 983 /* Initialize condition variable attribute ATTR. */ 984 extern int pthread_condattr_init (pthread_condattr_t *__attr) 985 __THROW __nonnull ((1)); 986 987 /* Destroy condition variable attribute ATTR. */ 988 extern int pthread_condattr_destroy (pthread_condattr_t *__attr) 989 __THROW __nonnull ((1)); 990 991 /* Get the process-shared flag of the condition variable attribute ATTR. */ 992 extern int pthread_condattr_getpshared (__const pthread_condattr_t * 993 __restrict __attr, 994 int *__restrict __pshared) 995 __THROW __nonnull ((1, 2)); 996 997 /* Set the process-shared flag of the condition variable attribute ATTR. */ 998 extern int pthread_condattr_setpshared (pthread_condattr_t *__attr, 999 int __pshared) __THROW __nonnull ((1)); 1000 1001 #ifdef __USE_XOPEN2K 1002 /* Get the clock selected for the conditon variable attribute ATTR. */ 1003 extern int pthread_condattr_getclock (__const pthread_condattr_t * 1004 __restrict __attr, 1005 __clockid_t *__restrict __clock_id) 1006 __THROW __nonnull ((1, 2)); 1007 1008 /* Set the clock selected for the conditon variable attribute ATTR. */ 1009 extern int pthread_condattr_setclock (pthread_condattr_t *__attr, 1010 __clockid_t __clock_id) 1011 __THROW __nonnull ((1)); 1012 #endif 1013 1014 1015 #ifdef __USE_XOPEN2K 1016 /* Functions to handle spinlocks. */ 1017 1018 /* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can 1019 be shared between different processes. */ 1020 extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared) 1021 __THROW __nonnull ((1)); 1022 1023 /* Destroy the spinlock LOCK. */ 1024 extern int pthread_spin_destroy (pthread_spinlock_t *__lock) 1025 __THROW __nonnull ((1)); 1026 1027 /* Wait until spinlock LOCK is retrieved. */ 1028 extern int pthread_spin_lock (pthread_spinlock_t *__lock) 1029 __THROW __nonnull ((1)); 1030 1031 /* Try to lock spinlock LOCK. */ 1032 extern int pthread_spin_trylock (pthread_spinlock_t *__lock) 1033 __THROW __nonnull ((1)); 1034 1035 /* Release spinlock LOCK. */ 1036 extern int pthread_spin_unlock (pthread_spinlock_t *__lock) 1037 __THROW __nonnull ((1)); 1038 1039 1040 /* Functions to handle barriers. */ 1041 1042 /* Initialize BARRIER with the attributes in ATTR. The barrier is 1043 opened when COUNT waiters arrived. */ 1044 extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier, 1045 __const pthread_barrierattr_t *__restrict 1046 __attr, unsigned int __count) 1047 __THROW __nonnull ((1)); 1048 1049 /* Destroy a previously dynamically initialized barrier BARRIER. */ 1050 extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) 1051 __THROW __nonnull ((1)); 1052 1053 /* Wait on barrier BARRIER. */ 1054 extern int pthread_barrier_wait (pthread_barrier_t *__barrier) 1055 __THROW __nonnull ((1)); 1056 1057 1058 /* Initialize barrier attribute ATTR. */ 1059 extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) 1060 __THROW __nonnull ((1)); 1061 1062 /* Destroy previously dynamically initialized barrier attribute ATTR. */ 1063 extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) 1064 __THROW __nonnull ((1)); 1065 1066 /* Get the process-shared flag of the barrier attribute ATTR. */ 1067 extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t * 1068 __restrict __attr, 1069 int *__restrict __pshared) 1070 __THROW __nonnull ((1, 2)); 1071 1072 /* Set the process-shared flag of the barrier attribute ATTR. */ 1073 extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr, 1074 int __pshared) 1075 __THROW __nonnull ((1)); 1076 #endif 1077 1078 1079 /* Functions for handling thread-specific data. */ 1080 1081 /* Create a key value identifying a location in the thread-specific 1082 data area. Each thread maintains a distinct thread-specific data 1083 area. DESTR_FUNCTION, if non-NULL, is called with the value 1084 associated to that key when the key is destroyed. 1085 DESTR_FUNCTION is not called if the value associated is NULL when 1086 the key is destroyed. */ 1087 extern int pthread_key_create (pthread_key_t *__key, 1088 void (*__destr_function) (void *)) 1089 __THROW __nonnull ((1)); 1090 1091 /* Destroy KEY. */ 1092 extern int pthread_key_delete (pthread_key_t __key) __THROW; 1093 1094 /* Return current value of the thread-specific data slot identified by KEY. */ 1095 extern void *pthread_getspecific (pthread_key_t __key) __THROW; 1096 1097 /* Store POINTER in the thread-specific data slot identified by KEY. */ 1098 extern int pthread_setspecific (pthread_key_t __key, 1099 __const void *__pointer) __THROW ; 1100 1101 1102 #ifdef __USE_XOPEN2K 1103 /* Get ID of CPU-time clock for thread THREAD_ID. */ 1104 extern int pthread_getcpuclockid (pthread_t __thread_id, 1105 __clockid_t *__clock_id) 1106 __THROW __nonnull ((2)); 1107 #endif 1108 1109 1110 /* Install handlers to be called when a new process is created with FORK. 1111 The PREPARE handler is called in the parent process just before performing 1112 FORK. The PARENT handler is called in the parent process just after FORK. 1113 The CHILD handler is called in the child process. Each of the three 1114 handlers can be NULL, meaning that no handler needs to be called at that 1115 point. 1116 PTHREAD_ATFORK can be called several times, in which case the PREPARE 1117 handlers are called in LIFO order (last added with PTHREAD_ATFORK, 1118 first called before FORK), and the PARENT and CHILD handlers are called 1119 in FIFO (first added, first called). */ 1120 1121 extern int pthread_atfork (void (*__prepare) (void), 1122 void (*__parent) (void), 1123 void (*__child) (void)) __THROW; 1124 1125 1126 #ifdef __USE_EXTERN_INLINES 1127 /* Optimizations. */ 1128 __extern_inline int 1129 __NTH (pthread_equal (pthread_t __thread1, pthread_t __thread2)) 1130 { 1131 return __thread1 == __thread2; 1132 } 1133 #endif 1134 1135 __END_DECLS 1136 1137 #endif /* pthread.h */ 1138
