1 /* Copyright (C) 2002-2007, 2009 Free Software Foundation, Inc.
2 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18 #ifndef _PTHREADP_H
19 #define _PTHREADP_H 1
20
21 #include <pthread.h>
22 #include <setjmp.h>
23 #include <stdbool.h>
24 #include <sys/syscall.h>
25 #include "descr.h"
26 #include <tls.h>
27 #include <lowlevellock.h>
28 #include <bits/stackinfo.h>
29 #include <internaltypes.h>
30 #include <atomic.h>
31 #include <bits/kernel-features.h>
32 #include <errno.h>
33 #include <internal-signals.h>
34
35
36 /* Atomic operations on TLS memory. */
37 #ifndef THREAD_ATOMIC_CMPXCHG_VAL
38 # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
39 atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
40 #endif
41
42 #ifndef THREAD_ATOMIC_BIT_SET
43 # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
44 atomic_bit_set (&(descr)->member, bit)
45 #endif
46
47
48 /* Adaptive mutex definitions. */
49 #ifndef MAX_ADAPTIVE_COUNT
50 # define MAX_ADAPTIVE_COUNT 100
51 #endif
52
53
54 /* Magic cookie representing robust mutex with dead owner. */
55 #define PTHREAD_MUTEX_INCONSISTENT INT_MAX
56 /* Magic cookie representing not recoverable robust mutex. */
57 #define PTHREAD_MUTEX_NOTRECOVERABLE (INT_MAX - 1)
58
59
60 /* Internal mutex type value. */
61 enum
62 {
63 PTHREAD_MUTEX_KIND_MASK_NP = 3,
64 PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
65 PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
66 = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
67 PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
68 = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
69 PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
70 = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
71 PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
72 PTHREAD_MUTEX_PI_NORMAL_NP
73 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
74 PTHREAD_MUTEX_PI_RECURSIVE_NP
75 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
76 PTHREAD_MUTEX_PI_ERRORCHECK_NP
77 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
78 PTHREAD_MUTEX_PI_ADAPTIVE_NP
79 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
80 PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
81 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
82 PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
83 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
84 PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
85 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
86 PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
87 = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
88 PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
89 PTHREAD_MUTEX_PP_NORMAL_NP
90 = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
91 PTHREAD_MUTEX_PP_RECURSIVE_NP
92 = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
93 PTHREAD_MUTEX_PP_ERRORCHECK_NP
94 = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
95 PTHREAD_MUTEX_PP_ADAPTIVE_NP
96 = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
97 };
98 #define PTHREAD_MUTEX_PSHARED_BIT 128
99
100 #define PTHREAD_MUTEX_TYPE(m) \
101 ((m)->__data.__kind & 127)
102
103 #if LLL_PRIVATE == 0 && LLL_SHARED == 128
104 # define PTHREAD_MUTEX_PSHARED(m) \
105 ((m)->__data.__kind & 128)
106 #else
107 # define PTHREAD_MUTEX_PSHARED(m) \
108 (((m)->__data.__kind & 128) ? LLL_SHARED : LLL_PRIVATE)
109 #endif
110
111 /* The kernel when waking robust mutexes on exit never uses
112 FUTEX_PRIVATE_FLAG FUTEX_WAKE. */
113 #define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
114
115 /* Ceiling in __data.__lock. __data.__lock is signed, so don't
116 use the MSB bit in there, but in the mask also include that bit,
117 so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
118 masking if the value is then shifted down by
119 PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */
120 #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19
121 #define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000
122
123
124 /* Flags in mutex attr. */
125 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28
126 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000
127 #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12
128 #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000
129 #define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000
130 #define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000
131 #define PTHREAD_MUTEXATTR_FLAG_BITS \
132 (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
133 | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
134
135
136 /* Check whether rwlock prefers readers. */
137 #define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
138 ((rwlock)->__data.__flags == 0)
139
140
141 /* Bits used in robust mutex implementation. */
142 #define FUTEX_WAITERS 0x80000000
143 #define FUTEX_OWNER_DIED 0x40000000
144 #define FUTEX_TID_MASK 0x3fffffff
145
146
147 /* Internal variables. */
148
149
150 /* Default stack size. */
151 extern size_t __default_stacksize attribute_hidden;
152
153 /* Size and alignment of static TLS block. */
154 extern size_t __static_tls_size attribute_hidden;
155 extern size_t __static_tls_align_m1 attribute_hidden;
156
157 /* Flag whether the machine is SMP or not. */
158 extern int __is_smp attribute_hidden;
159
160 /* Thread descriptor handling. */
161 extern list_t __stack_user;
162 hidden_proto (__stack_user)
163
164 /* Attribute handling. */
165 extern struct pthread_attr *__attr_list attribute_hidden;
166 extern int __attr_list_lock attribute_hidden;
167
168 /* First available RT signal. */
169 extern int __current_sigrtmin attribute_hidden;
170 /* Last available RT signal. */
171 extern int __current_sigrtmax attribute_hidden;
172
173 /* Concurrency handling. */
174 extern int __concurrency_level attribute_hidden;
175
176 /* Thread-local data key handling. */
177 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
178 hidden_proto (__pthread_keys)
179
180 /* Number of threads running. */
181 extern unsigned int __nptl_nthreads
182 #ifdef SHARED
183 attribute_hidden
184 #else
185 __attribute ((weak))
186 #endif
187 ;
188
189 #ifndef __ASSUME_SET_ROBUST_LIST
190 /* Negative if we do not have the system call and we can use it. */
191 extern int __set_robust_list_avail attribute_hidden;
192 #endif
193
194 /* Thread Priority Protection. */
195 extern int __sched_fifo_min_prio attribute_hidden;
196 extern int __sched_fifo_max_prio attribute_hidden;
197 extern void __init_sched_fifo_prio (void) attribute_hidden;
198 extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
199 attribute_hidden;
200 extern int __pthread_current_priority (void) attribute_hidden;
201
202 /* The library can run in debugging mode where it performs a lot more
203 tests. */
204 extern int __pthread_debug attribute_hidden;
205 /** For now disable debugging support. */
206 #if 0
207 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
208 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
209 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
210 #else
211 # define DEBUGGING_P 0
212 /* Simplified test. This will not catch all invalid descriptors but
213 is better than nothing. And if the test triggers the thread
214 descriptor is guaranteed to be invalid. */
215 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
216 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
217 #endif
218
219
220 /* Cancellation test. */
221 #define CANCELLATION_P(self) \
222 do { \
223 cancelhandling = THREAD_GETMEM (self, cancelhandling); \
224 if (CANCEL_ENABLED_AND_CANCELED (cancelhandling)) \
225 { \
226 THREAD_SETMEM (self, result, PTHREAD_CANCELED); \
227 __do_cancel (); \
228 } \
229 } while (0)
230
231
232 extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
233 __cleanup_fct_attribute __attribute ((__noreturn__))
234 #if !defined SHARED && !defined IS_IN_libpthread
235 weak_function
236 #endif
237 ;
238 extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
239 __cleanup_fct_attribute __attribute ((__noreturn__))
240 #ifndef SHARED
241 weak_function
242 #endif
243 ;
244 extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
245 __cleanup_fct_attribute;
246 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
247 __cleanup_fct_attribute;
248 #if defined NOT_IN_libc && defined IS_IN_libpthread
249 hidden_proto (__pthread_unwind)
250 hidden_proto (__pthread_unwind_next)
251 hidden_proto (__pthread_register_cancel)
252 hidden_proto (__pthread_unregister_cancel)
253 # ifdef SHARED
254 extern void attribute_hidden pthread_cancel_init (void);
255 extern void __unwind_freeres (void);
256 # endif
257 #endif
258
259
260 /* Called when a thread reacts on a cancellation request. */
261 static inline void
262 __attribute ((noreturn, always_inline))
__do_cancel(void)263 __do_cancel (void)
264 {
265 struct pthread *self = THREAD_SELF;
266
267 /* Make sure we get no more cancellations. */
268 THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
269
270 __pthread_unwind ((__pthread_unwind_buf_t *)
271 THREAD_GETMEM (self, cleanup_jmp_buf));
272 }
273
274
275 /* Set cancellation mode to asynchronous. */
276 #define CANCEL_ASYNC() \
277 __pthread_enable_asynccancel ()
278 /* Reset to previous cancellation mode. */
279 #define CANCEL_RESET(oldtype) \
280 __pthread_disable_asynccancel (oldtype)
281
282 #define __LABEL_PREFIX__ __stringify(__USER_LABEL_PREFIX__)
283
284 #if !defined NOT_IN_libc
285 /* Same as CANCEL_ASYNC, but for use in libc.so. */
286 # define LIBC_CANCEL_ASYNC() \
287 __libc_enable_asynccancel ()
288 /* Same as CANCEL_RESET, but for use in libc.so. */
289 # define LIBC_CANCEL_RESET(oldtype) \
290 __libc_disable_asynccancel (oldtype)
291 # define LIBC_CANCEL_HANDLED() \
292 __asm__ (".globl " __LABEL_PREFIX__ "__libc_enable_asynccancel"); \
293 __asm__ (".globl " __LABEL_PREFIX__ "__libc_disable_asynccancel")
294 #elif defined NOT_IN_libc && defined IS_IN_libpthread
295 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
296 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
297 # define LIBC_CANCEL_HANDLED() \
298 __asm__ (".globl " __LABEL_PREFIX__ "__pthread_enable_asynccancel"); \
299 __asm__ (".globl " __LABEL_PREFIX__ "__pthread_disable_asynccancel")
300 #elif defined NOT_IN_libc && defined IS_IN_librt
301 # define LIBC_CANCEL_ASYNC() \
302 __librt_enable_asynccancel ()
303 # define LIBC_CANCEL_RESET(val) \
304 __librt_disable_asynccancel (val)
305 # define LIBC_CANCEL_HANDLED() \
306 __asm__ (".globl " __LABEL_PREFIX__ "__librt_enable_asynccancel"); \
307 __asm__ (".globl " __LABEL_PREFIX__ "__librt_disable_asynccancel")
308 #else
309 # define LIBC_CANCEL_ASYNC() 0 /* Just a dummy value. */
310 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it. */
311 # define LIBC_CANCEL_HANDLED() /* Nothing. */
312 #endif
313
314 /* Internal prototypes. */
315
316 /* Thread list handling. */
317 extern struct pthread *__find_in_stack_list (struct pthread *pd)
318 attribute_hidden internal_function;
319
320 /* Deallocate a thread's stack after optionally making sure the thread
321 descriptor is still valid. */
322 extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
323
324 /* Free allocated stack. */
325 extern void __deallocate_stack (struct pthread *pd)
326 attribute_hidden internal_function;
327
328 /* Mark all the stacks except for the current one as available. This
329 function also re-initializes the lock for the stack cache. */
330 extern void __reclaim_stacks (void) attribute_hidden;
331
332 /* Make all threads's stacks executable. */
333 extern int __make_stacks_executable (void **stack_endp)
334 internal_function attribute_hidden;
335
336 /* longjmp handling. */
337 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
338 #if defined NOT_IN_libc && defined IS_IN_libpthread
339 hidden_proto (__pthread_cleanup_upto)
340 #endif
341
342 extern int pthread_create (pthread_t *newthread,
343 const pthread_attr_t *attr,
344 void *(*start_routine) (void *), void *arg);
345 extern int pthread_attr_init (pthread_attr_t *attr);
346
347
348 /* Event handlers for libthread_db interface. */
349 extern void __nptl_create_event (void);
350 extern void __nptl_death_event (void);
351 hidden_proto (__nptl_create_event)
352 hidden_proto (__nptl_death_event)
353
354 /* Register the generation counter in the libpthread with the libc. */
355 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
356 extern void __libc_pthread_init (unsigned long int *ptr,
357 void (*reclaim) (void));
358 #else
359 extern int *__libc_pthread_init (unsigned long int *ptr,
360 void (*reclaim) (void));
361
362 /* Variable set to a nonzero value if more than one thread runs or ran. */
363 extern int __pthread_multiple_threads attribute_hidden;
364 /* Pointer to the corresponding variable in libc. */
365 extern int *__libc_multiple_threads_ptr attribute_hidden;
366 #endif
367
368 /* Find a thread given its TID. */
369 extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
370 #ifdef SHARED
371 ;
372 #else
373 weak_function;
374 #define __find_thread_by_id(tid) \
375 (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
376 #endif
377
378 extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
379
380 extern size_t __pthread_get_minstack (const pthread_attr_t *attr);
381
382 /* Namespace save aliases. */
383 extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
384 struct sched_param *param);
385 extern int __pthread_setschedparam (pthread_t thread_id, int policy,
386 const struct sched_param *param);
387 extern int __pthread_setcancelstate (int state, int *oldstate);
388 extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
389 const pthread_mutexattr_t *__mutexattr);
390 extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
391 const pthread_mutexattr_t *__mutexattr)
392 attribute_hidden;
393 extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
394 extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
395 attribute_hidden;
396 extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
397 extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
398 extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
399 attribute_hidden;
400 extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
401 attribute_hidden internal_function;
402 extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)
403 attribute_hidden internal_function;
404 extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
405 extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
406 attribute_hidden;
407 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
408 int __decr)
409 attribute_hidden internal_function;
410 extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
411 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
412 extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
413 extern int __pthread_attr_destroy (pthread_attr_t *attr);
414 extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
415 int *detachstate);
416 extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
417 int detachstate);
418 extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
419 int *inherit);
420 extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
421 extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
422 struct sched_param *param);
423 extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
424 const struct sched_param *param);
425 extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
426 int *policy);
427 extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
428 extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
429 extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
430 extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict
431 __attr, void **__restrict __stackaddr);
432 extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
433 void *__stackaddr);
434 extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict
435 __attr,
436 size_t *__restrict __stacksize);
437 extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
438 size_t __stacksize);
439 extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
440 void **__restrict __stackaddr,
441 size_t *__restrict __stacksize);
442 extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
443 size_t __stacksize);
444 extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
445 const pthread_rwlockattr_t *__restrict
446 __attr);
447 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
448 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
449 extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
450 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
451 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
452 extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
453 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
454 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
455 extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
456 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
457 extern int __pthread_cond_destroy (pthread_cond_t *cond);
458 extern int __pthread_cond_init (pthread_cond_t *cond,
459 const pthread_condattr_t *cond_attr);
460 extern int __pthread_cond_signal (pthread_cond_t *cond);
461 extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
462 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
463 pthread_mutex_t *mutex,
464 const struct timespec *abstime);
465 extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
466 extern int __pthread_condattr_init (pthread_condattr_t *attr);
467 extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
468 extern int __pthread_key_create_internal (pthread_key_t *key,
469 void (*destr) (void *));
470 extern void *__pthread_getspecific (pthread_key_t key);
471 extern void *__pthread_getspecific_internal (pthread_key_t key);
472 extern int __pthread_setspecific (pthread_key_t key, const void *value);
473 extern int __pthread_setspecific_internal (pthread_key_t key,
474 const void *value);
475 extern int __pthread_once (pthread_once_t *once_control,
476 void (*init_routine) (void));
477 extern int __pthread_once_internal (pthread_once_t *once_control,
478 void (*init_routine) (void));
479 extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
480 void (*child) (void));
481 extern pthread_t __pthread_self (void);
482 extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
483 extern int __pthread_kill (pthread_t threadid, int signo);
484 extern void __pthread_exit (void *value);
485 extern int __pthread_setcanceltype (int type, int *oldtype);
486 extern int __pthread_enable_asynccancel (void) attribute_hidden;
487 extern void __pthread_disable_asynccancel (int oldtype)
488 internal_function attribute_hidden;
489
490 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
491 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
492 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
493 const pthread_condattr_t *cond_attr);
494 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
495 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
496 pthread_mutex_t *mutex,
497 const struct timespec *abstime);
498 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
499 pthread_mutex_t *mutex);
500
501 extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
502 cpu_set_t *cpuset);
503
504 /* The two functions are in libc.so and not exported. */
505 extern int __libc_enable_asynccancel (void) attribute_hidden;
506 extern void __libc_disable_asynccancel (int oldtype)
507 internal_function attribute_hidden;
508
509
510 /* The two functions are in librt.so and not exported. */
511 extern int __librt_enable_asynccancel (void) attribute_hidden;
512 extern void __librt_disable_asynccancel (int oldtype)
513 internal_function attribute_hidden;
514
515 #ifdef IS_IN_libpthread
516 /* Special versions which use non-exported functions. */
517 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
518 void (*routine) (void *), void *arg)
519 attribute_hidden;
520 # undef pthread_cleanup_push
521 # define pthread_cleanup_push(routine,arg) \
522 { struct _pthread_cleanup_buffer _buffer; \
523 __pthread_cleanup_push (&_buffer, (routine), (arg));
524
525 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
526 int execute) attribute_hidden;
527 # undef pthread_cleanup_pop
528 # define pthread_cleanup_pop(execute) \
529 __pthread_cleanup_pop (&_buffer, (execute)); }
530 #endif
531
532 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
533 void (*routine) (void *), void *arg);
534 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
535 int execute);
536
537 /* Old cleanup interfaces, still used in libc.so. */
538 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
539 void (*routine) (void *), void *arg);
540 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
541 int execute);
542 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
543 void (*routine) (void *), void *arg);
544 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
545 int execute);
546
547 extern void __nptl_deallocate_tsd (void)
548 #ifdef SHARED
549 attribute_hidden
550 #else
551 __attribute ((weak))
552 #endif
553 ;
554
555 extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
556
557 extern void __free_stacks (size_t limit) attribute_hidden;
558
559 extern void __wait_lookup_done (void) attribute_hidden;
560
561 #ifdef SHARED
562 # define PTHREAD_STATIC_FN_REQUIRE(name)
563 #else
564 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm__ (".globl " #name);
565 #endif
566
567
568 #ifndef __NR_set_robust_list
569 /* XXX For the time being... Once we can rely on the kernel headers
570 having the definition remove these lines. */
571 # if defined __i386__
572 # define __NR_set_robust_list 311
573 # elif defined __x86_64__
574 # define __NR_set_robust_list 273
575 # endif
576 #endif
577
578 #endif /* pthreadP.h */
579