1 /* Copyright (C) 2002-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
25 #include <sys/syscall.h>
28 #include <lowlevellock.h>
29 #include <stackinfo.h>
30 #include <internaltypes.h>
31 #include <pthread-functions.h>
33 #include <kernel-features.h>
35 #include <nptl-signals.h>
38 /* Atomic operations on TLS memory. */
39 #ifndef THREAD_ATOMIC_CMPXCHG_VAL
40 # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
41 atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
44 #ifndef THREAD_ATOMIC_BIT_SET
45 # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
46 atomic_bit_set (&(descr)->member, bit)
50 /* Adaptive mutex definitions. */
51 #ifndef MAX_ADAPTIVE_COUNT
52 # define MAX_ADAPTIVE_COUNT 100
56 /* Magic cookie representing robust mutex with dead owner. */
57 #define PTHREAD_MUTEX_INCONSISTENT INT_MAX
58 /* Magic cookie representing not recoverable robust mutex. */
59 #define PTHREAD_MUTEX_NOTRECOVERABLE (INT_MAX - 1)
62 /* Internal mutex type value. */
65 PTHREAD_MUTEX_KIND_MASK_NP
= 3,
67 PTHREAD_MUTEX_ELISION_NP
= 256,
68 PTHREAD_MUTEX_NO_ELISION_NP
= 512,
70 PTHREAD_MUTEX_ROBUST_NORMAL_NP
= 16,
71 PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
72 = PTHREAD_MUTEX_ROBUST_NORMAL_NP
| PTHREAD_MUTEX_RECURSIVE_NP
,
73 PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
74 = PTHREAD_MUTEX_ROBUST_NORMAL_NP
| PTHREAD_MUTEX_ERRORCHECK_NP
,
75 PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
76 = PTHREAD_MUTEX_ROBUST_NORMAL_NP
| PTHREAD_MUTEX_ADAPTIVE_NP
,
77 PTHREAD_MUTEX_PRIO_INHERIT_NP
= 32,
78 PTHREAD_MUTEX_PI_NORMAL_NP
79 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_NORMAL
,
80 PTHREAD_MUTEX_PI_RECURSIVE_NP
81 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_RECURSIVE_NP
,
82 PTHREAD_MUTEX_PI_ERRORCHECK_NP
83 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ERRORCHECK_NP
,
84 PTHREAD_MUTEX_PI_ADAPTIVE_NP
85 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ADAPTIVE_NP
,
86 PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
87 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ROBUST_NORMAL_NP
,
88 PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
89 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
,
90 PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
91 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
,
92 PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
93 = PTHREAD_MUTEX_PRIO_INHERIT_NP
| PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
,
94 PTHREAD_MUTEX_PRIO_PROTECT_NP
= 64,
95 PTHREAD_MUTEX_PP_NORMAL_NP
96 = PTHREAD_MUTEX_PRIO_PROTECT_NP
| PTHREAD_MUTEX_NORMAL
,
97 PTHREAD_MUTEX_PP_RECURSIVE_NP
98 = PTHREAD_MUTEX_PRIO_PROTECT_NP
| PTHREAD_MUTEX_RECURSIVE_NP
,
99 PTHREAD_MUTEX_PP_ERRORCHECK_NP
100 = PTHREAD_MUTEX_PRIO_PROTECT_NP
| PTHREAD_MUTEX_ERRORCHECK_NP
,
101 PTHREAD_MUTEX_PP_ADAPTIVE_NP
102 = PTHREAD_MUTEX_PRIO_PROTECT_NP
| PTHREAD_MUTEX_ADAPTIVE_NP
,
103 PTHREAD_MUTEX_ELISION_FLAGS_NP
104 = PTHREAD_MUTEX_ELISION_NP
| PTHREAD_MUTEX_NO_ELISION_NP
,
106 PTHREAD_MUTEX_TIMED_ELISION_NP
=
107 PTHREAD_MUTEX_TIMED_NP
| PTHREAD_MUTEX_ELISION_NP
,
108 PTHREAD_MUTEX_TIMED_NO_ELISION_NP
=
109 PTHREAD_MUTEX_TIMED_NP
| PTHREAD_MUTEX_NO_ELISION_NP
,
111 #define PTHREAD_MUTEX_PSHARED_BIT 128
113 #define PTHREAD_MUTEX_TYPE(m) \
114 ((m)->__data.__kind & 127)
115 /* Don't include NO_ELISION, as that type is always the same
116 as the underlying lock type. */
117 #define PTHREAD_MUTEX_TYPE_ELISION(m) \
118 ((m)->__data.__kind & (127|PTHREAD_MUTEX_ELISION_NP))
120 #if LLL_PRIVATE == 0 && LLL_SHARED == 128
121 # define PTHREAD_MUTEX_PSHARED(m) \
122 ((m)->__data.__kind & 128)
124 # define PTHREAD_MUTEX_PSHARED(m) \
125 (((m)->__data.__kind & 128) ? LLL_SHARED : LLL_PRIVATE)
128 /* The kernel when waking robust mutexes on exit never uses
129 FUTEX_PRIVATE_FLAG FUTEX_WAKE. */
130 #define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
132 /* Ceiling in __data.__lock. __data.__lock is signed, so don't
133 use the MSB bit in there, but in the mask also include that bit,
134 so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
135 masking if the value is then shifted down by
136 PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */
137 #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19
138 #define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000
141 /* Flags in mutex attr. */
142 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28
143 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000
144 #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12
145 #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000
146 #define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000
147 #define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000
148 #define PTHREAD_MUTEXATTR_FLAG_BITS \
149 (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
150 | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
153 /* Check whether rwlock prefers readers. */
154 #define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
155 ((rwlock)->__data.__flags == 0)
158 /* Bits used in robust mutex implementation. */
159 #define FUTEX_WAITERS 0x80000000
160 #define FUTEX_OWNER_DIED 0x40000000
161 #define FUTEX_TID_MASK 0x3fffffff
164 /* Internal variables. */
167 /* Default pthread attributes. */
168 extern struct pthread_attr __default_pthread_attr attribute_hidden
;
169 extern int __default_pthread_attr_lock attribute_hidden
;
171 /* Size and alignment of static TLS block. */
172 extern size_t __static_tls_size attribute_hidden
;
173 extern size_t __static_tls_align_m1 attribute_hidden
;
175 /* Flag whether the machine is SMP or not. */
176 extern int __is_smp attribute_hidden
;
178 /* Thread descriptor handling. */
179 extern list_t __stack_user
;
180 hidden_proto (__stack_user
)
182 /* Attribute handling. */
183 extern struct pthread_attr
*__attr_list attribute_hidden
;
184 extern int __attr_list_lock attribute_hidden
;
186 /* Concurrency handling. */
187 extern int __concurrency_level attribute_hidden
;
189 /* Thread-local data key handling. */
190 extern struct pthread_key_struct __pthread_keys
[PTHREAD_KEYS_MAX
];
191 hidden_proto (__pthread_keys
)
193 /* Number of threads running. */
194 extern unsigned int __nptl_nthreads attribute_hidden
;
196 #ifndef __ASSUME_SET_ROBUST_LIST
197 /* Negative if we do not have the system call and we can use it. */
198 extern int __set_robust_list_avail attribute_hidden
;
201 /* Thread Priority Protection. */
202 extern int __sched_fifo_min_prio attribute_hidden
;
203 extern int __sched_fifo_max_prio attribute_hidden
;
204 extern void __init_sched_fifo_prio (void) attribute_hidden
;
205 extern int __pthread_tpp_change_priority (int prev_prio
, int new_prio
)
207 extern int __pthread_current_priority (void) attribute_hidden
;
209 /* The library can run in debugging mode where it performs a lot more
211 extern int __pthread_debug attribute_hidden
;
212 /** For now disable debugging support. */
214 # define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
215 # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
216 # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
218 # define DEBUGGING_P 0
219 /* Simplified test. This will not catch all invalid descriptors but
220 is better than nothing. And if the test triggers the thread
221 descriptor is guaranteed to be invalid. */
222 # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
223 # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
227 /* Cancellation test. */
228 #define CANCELLATION_P(self) \
230 int cancelhandling = THREAD_GETMEM (self, cancelhandling); \
231 if (CANCEL_ENABLED_AND_CANCELED (cancelhandling)) \
233 THREAD_SETMEM (self, result, PTHREAD_CANCELED); \
239 extern void __pthread_unwind (__pthread_unwind_buf_t
*__buf
)
240 __cleanup_fct_attribute
__attribute ((__noreturn__
))
241 #if !defined SHARED && !defined IS_IN_libpthread
245 extern void __pthread_unwind_next (__pthread_unwind_buf_t
*__buf
)
246 __cleanup_fct_attribute
__attribute ((__noreturn__
))
251 extern void __pthread_register_cancel (__pthread_unwind_buf_t
*__buf
)
252 __cleanup_fct_attribute
;
253 extern void __pthread_unregister_cancel (__pthread_unwind_buf_t
*__buf
)
254 __cleanup_fct_attribute
;
255 #ifdef IS_IN_libpthread
256 hidden_proto (__pthread_unwind
)
257 hidden_proto (__pthread_unwind_next
)
258 hidden_proto (__pthread_register_cancel
)
259 hidden_proto (__pthread_unregister_cancel
)
261 extern void attribute_hidden
pthread_cancel_init (void);
262 extern void __unwind_freeres (void);
267 /* Called when a thread reacts on a cancellation request. */
269 __attribute ((noreturn
, always_inline
))
272 struct pthread
*self
= THREAD_SELF
;
274 /* Make sure we get no more cancellations. */
275 THREAD_ATOMIC_BIT_SET (self
, cancelhandling
, EXITING_BIT
);
277 __pthread_unwind ((__pthread_unwind_buf_t
*)
278 THREAD_GETMEM (self
, cleanup_jmp_buf
));
282 /* Set cancellation mode to asynchronous. */
283 #define CANCEL_ASYNC() \
284 __pthread_enable_asynccancel ()
285 /* Reset to previous cancellation mode. */
286 #define CANCEL_RESET(oldtype) \
287 __pthread_disable_asynccancel (oldtype)
289 #if !defined NOT_IN_libc
290 /* Same as CANCEL_ASYNC, but for use in libc.so. */
291 # define LIBC_CANCEL_ASYNC() \
292 __libc_enable_asynccancel ()
293 /* Same as CANCEL_RESET, but for use in libc.so. */
294 # define LIBC_CANCEL_RESET(oldtype) \
295 __libc_disable_asynccancel (oldtype)
296 # define LIBC_CANCEL_HANDLED() \
297 __asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
298 __asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
299 #elif defined IS_IN_libpthread
300 # define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
301 # define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
302 # define LIBC_CANCEL_HANDLED() \
303 __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
304 __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
305 #elif defined IS_IN_librt
306 # define LIBC_CANCEL_ASYNC() \
307 __librt_enable_asynccancel ()
308 # define LIBC_CANCEL_RESET(val) \
309 __librt_disable_asynccancel (val)
310 # define LIBC_CANCEL_HANDLED() \
311 __asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
312 __asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
314 # define LIBC_CANCEL_ASYNC() 0 /* Just a dummy value. */
315 # define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it. */
316 # define LIBC_CANCEL_HANDLED() /* Nothing. */
320 /* Internal prototypes. */
322 /* Thread list handling. */
323 extern struct pthread
*__find_in_stack_list (struct pthread
*pd
)
324 attribute_hidden internal_function
;
326 /* Deallocate a thread's stack after optionally making sure the thread
327 descriptor is still valid. */
328 extern void __free_tcb (struct pthread
*pd
) attribute_hidden internal_function
;
330 /* Free allocated stack. */
331 extern void __deallocate_stack (struct pthread
*pd
)
332 attribute_hidden internal_function
;
334 /* Mark all the stacks except for the current one as available. This
335 function also re-initializes the lock for the stack cache. */
336 extern void __reclaim_stacks (void) attribute_hidden
;
338 /* Make all threads's stacks executable. */
339 extern int __make_stacks_executable (void **stack_endp
)
340 internal_function attribute_hidden
;
342 /* longjmp handling. */
343 extern void __pthread_cleanup_upto (__jmp_buf target
, char *targetframe
);
344 #ifdef IS_IN_libpthread
345 hidden_proto (__pthread_cleanup_upto
)
349 /* Functions with versioned interfaces. */
350 extern int __pthread_create_2_1 (pthread_t
*newthread
,
351 const pthread_attr_t
*attr
,
352 void *(*start_routine
) (void *), void *arg
);
353 extern int __pthread_create_2_0 (pthread_t
*newthread
,
354 const pthread_attr_t
*attr
,
355 void *(*start_routine
) (void *), void *arg
);
356 extern int __pthread_attr_init_2_1 (pthread_attr_t
*attr
);
357 extern int __pthread_attr_init_2_0 (pthread_attr_t
*attr
);
360 /* Event handlers for libthread_db interface. */
361 extern void __nptl_create_event (void);
362 extern void __nptl_death_event (void);
363 hidden_proto (__nptl_create_event
)
364 hidden_proto (__nptl_death_event
)
366 /* Register the generation counter in the libpthread with the libc. */
367 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
368 extern void __libc_pthread_init (unsigned long int *ptr
,
369 void (*reclaim
) (void),
370 const struct pthread_functions
*functions
)
373 extern int *__libc_pthread_init (unsigned long int *ptr
,
374 void (*reclaim
) (void),
375 const struct pthread_functions
*functions
)
378 /* Variable set to a nonzero value either if more than one thread runs or ran,
379 or if a single-threaded process is trying to cancel itself. See
380 nptl/descr.h for more context on the single-threaded process case. */
381 extern int __pthread_multiple_threads attribute_hidden
;
382 /* Pointer to the corresponding variable in libc. */
383 extern int *__libc_multiple_threads_ptr attribute_hidden
;
386 /* Find a thread given its TID. */
387 extern struct pthread
*__find_thread_by_id (pid_t tid
) attribute_hidden
392 #define __find_thread_by_id(tid) \
393 (__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
396 extern void __pthread_init_static_tls (struct link_map
*) attribute_hidden
;
398 extern size_t __pthread_get_minstack (const pthread_attr_t
*attr
);
400 /* Namespace save aliases. */
401 extern int __pthread_getschedparam (pthread_t thread_id
, int *policy
,
402 struct sched_param
*param
);
403 extern int __pthread_setschedparam (pthread_t thread_id
, int policy
,
404 const struct sched_param
*param
);
405 extern int __pthread_setcancelstate (int state
, int *oldstate
);
406 extern int __pthread_mutex_init (pthread_mutex_t
*__mutex
,
407 const pthread_mutexattr_t
*__mutexattr
);
408 extern int __pthread_mutex_destroy (pthread_mutex_t
*__mutex
);
409 extern int __pthread_mutex_trylock (pthread_mutex_t
*_mutex
);
410 extern int __pthread_mutex_lock (pthread_mutex_t
*__mutex
);
411 extern int __pthread_mutex_cond_lock (pthread_mutex_t
*__mutex
)
412 attribute_hidden internal_function
;
413 extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t
*__mutex
)
414 attribute_hidden internal_function
;
415 extern int __pthread_mutex_unlock (pthread_mutex_t
*__mutex
);
416 extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t
*__mutex
,
418 attribute_hidden internal_function
;
419 extern int __pthread_mutexattr_init (pthread_mutexattr_t
*attr
);
420 extern int __pthread_mutexattr_destroy (pthread_mutexattr_t
*attr
);
421 extern int __pthread_mutexattr_settype (pthread_mutexattr_t
*attr
, int kind
);
422 extern int __pthread_attr_destroy (pthread_attr_t
*attr
);
423 extern int __pthread_attr_getdetachstate (const pthread_attr_t
*attr
,
425 extern int __pthread_attr_setdetachstate (pthread_attr_t
*attr
,
427 extern int __pthread_attr_getinheritsched (const pthread_attr_t
*attr
,
429 extern int __pthread_attr_setinheritsched (pthread_attr_t
*attr
, int inherit
);
430 extern int __pthread_attr_getschedparam (const pthread_attr_t
*attr
,
431 struct sched_param
*param
);
432 extern int __pthread_attr_setschedparam (pthread_attr_t
*attr
,
433 const struct sched_param
*param
);
434 extern int __pthread_attr_getschedpolicy (const pthread_attr_t
*attr
,
436 extern int __pthread_attr_setschedpolicy (pthread_attr_t
*attr
, int policy
);
437 extern int __pthread_attr_getscope (const pthread_attr_t
*attr
, int *scope
);
438 extern int __pthread_attr_setscope (pthread_attr_t
*attr
, int scope
);
439 extern int __pthread_attr_getstackaddr (const pthread_attr_t
*__restrict
440 __attr
, void **__restrict __stackaddr
);
441 extern int __pthread_attr_setstackaddr (pthread_attr_t
*__attr
,
443 extern int __pthread_attr_getstacksize (const pthread_attr_t
*__restrict
445 size_t *__restrict __stacksize
);
446 extern int __pthread_attr_setstacksize (pthread_attr_t
*__attr
,
448 extern int __pthread_attr_getstack (const pthread_attr_t
*__restrict __attr
,
449 void **__restrict __stackaddr
,
450 size_t *__restrict __stacksize
);
451 extern int __pthread_attr_setstack (pthread_attr_t
*__attr
, void *__stackaddr
,
453 extern int __pthread_rwlock_init (pthread_rwlock_t
*__restrict __rwlock
,
454 const pthread_rwlockattr_t
*__restrict
456 extern int __pthread_rwlock_destroy (pthread_rwlock_t
*__rwlock
);
457 extern int __pthread_rwlock_rdlock (pthread_rwlock_t
*__rwlock
);
458 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t
*__rwlock
);
459 extern int __pthread_rwlock_wrlock (pthread_rwlock_t
*__rwlock
);
460 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t
*__rwlock
);
461 extern int __pthread_rwlock_unlock (pthread_rwlock_t
*__rwlock
);
462 extern int __pthread_cond_broadcast (pthread_cond_t
*cond
);
463 extern int __pthread_cond_destroy (pthread_cond_t
*cond
);
464 extern int __pthread_cond_init (pthread_cond_t
*cond
,
465 const pthread_condattr_t
*cond_attr
);
466 extern int __pthread_cond_signal (pthread_cond_t
*cond
);
467 extern int __pthread_cond_wait (pthread_cond_t
*cond
, pthread_mutex_t
*mutex
);
468 extern int __pthread_cond_timedwait (pthread_cond_t
*cond
,
469 pthread_mutex_t
*mutex
,
470 const struct timespec
*abstime
);
471 extern int __pthread_condattr_destroy (pthread_condattr_t
*attr
);
472 extern int __pthread_condattr_init (pthread_condattr_t
*attr
);
473 extern int __pthread_key_create (pthread_key_t
*key
, void (*destr
) (void *));
474 extern void *__pthread_getspecific (pthread_key_t key
);
475 extern int __pthread_setspecific (pthread_key_t key
, const void *value
);
476 extern int __pthread_once (pthread_once_t
*once_control
,
477 void (*init_routine
) (void));
478 extern int __pthread_atfork (void (*prepare
) (void), void (*parent
) (void),
479 void (*child
) (void));
480 extern pthread_t
__pthread_self (void);
481 extern int __pthread_equal (pthread_t thread1
, pthread_t thread2
);
482 extern int __pthread_kill (pthread_t threadid
, int signo
);
483 extern void __pthread_exit (void *value
) __attribute__ ((__noreturn__
));
484 extern int __pthread_setcanceltype (int type
, int *oldtype
);
485 extern int __pthread_enable_asynccancel (void) attribute_hidden
;
486 extern void __pthread_disable_asynccancel (int oldtype
)
487 internal_function attribute_hidden
;
489 #ifdef IS_IN_libpthread
490 hidden_proto (__pthread_mutex_init
)
491 hidden_proto (__pthread_mutex_destroy
)
492 hidden_proto (__pthread_mutex_lock
)
493 hidden_proto (__pthread_mutex_unlock
)
494 hidden_proto (__pthread_rwlock_rdlock
)
495 hidden_proto (__pthread_rwlock_wrlock
)
496 hidden_proto (__pthread_rwlock_unlock
)
497 hidden_proto (__pthread_key_create
)
498 hidden_proto (__pthread_getspecific
)
499 hidden_proto (__pthread_setspecific
)
500 hidden_proto (__pthread_once
)
503 extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t
*cond
);
504 extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t
*cond
);
505 extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t
*cond
,
506 const pthread_condattr_t
*cond_attr
);
507 extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t
*cond
);
508 extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t
*cond
,
509 pthread_mutex_t
*mutex
,
510 const struct timespec
*abstime
);
511 extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t
*cond
,
512 pthread_mutex_t
*mutex
);
514 extern int __pthread_getaffinity_np (pthread_t th
, size_t cpusetsize
,
517 /* The two functions are in libc.so and not exported. */
518 extern int __libc_enable_asynccancel (void) attribute_hidden
;
519 extern void __libc_disable_asynccancel (int oldtype
)
520 internal_function attribute_hidden
;
523 /* The two functions are in librt.so and not exported. */
524 extern int __librt_enable_asynccancel (void) attribute_hidden
;
525 extern void __librt_disable_asynccancel (int oldtype
)
526 internal_function attribute_hidden
;
528 #ifdef IS_IN_libpthread
529 /* Special versions which use non-exported functions. */
530 extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer
*buffer
,
531 void (*routine
) (void *), void *arg
)
533 # undef pthread_cleanup_push
534 # define pthread_cleanup_push(routine,arg) \
535 { struct _pthread_cleanup_buffer _buffer; \
536 __pthread_cleanup_push (&_buffer, (routine), (arg));
538 extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer
*buffer
,
539 int execute
) attribute_hidden
;
540 # undef pthread_cleanup_pop
541 # define pthread_cleanup_pop(execute) \
542 __pthread_cleanup_pop (&_buffer, (execute)); }
545 extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer
*buffer
,
546 void (*routine
) (void *), void *arg
);
547 extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer
*buffer
,
550 /* Old cleanup interfaces, still used in libc.so. */
551 extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer
*buffer
,
552 void (*routine
) (void *), void *arg
);
553 extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer
*buffer
,
555 extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer
*buffer
,
556 void (*routine
) (void *), void *arg
);
557 extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer
*buffer
,
560 extern void __nptl_deallocate_tsd (void) attribute_hidden
;
562 extern void __nptl_setxid_error (struct xid_command
*cmdp
, int error
)
564 extern int __nptl_setxid (struct xid_command
*cmdp
) attribute_hidden
;
566 extern void __nptl_set_robust (struct pthread
*self
);
569 extern void __free_stacks (size_t limit
) attribute_hidden
;
571 extern void __wait_lookup_done (void) attribute_hidden
;
574 # define PTHREAD_STATIC_FN_REQUIRE(name)
576 # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
579 /* Test if the mutex is suitable for the FUTEX_WAIT_REQUEUE_PI operation. */
580 #if (defined lll_futex_wait_requeue_pi \
581 && defined __ASSUME_REQUEUE_PI)
582 # define USE_REQUEUE_PI(mut) \
583 ((mut) && (mut) != (void *) ~0l \
584 && (((mut)->__data.__kind \
585 & (PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP)) \
586 == PTHREAD_MUTEX_PRIO_INHERIT_NP))
588 # define USE_REQUEUE_PI(mut) 0
591 /* Returns 0 if POL is a valid scheduling policy. */
593 check_sched_policy_attr (int pol
)
595 if (pol
== SCHED_OTHER
|| pol
== SCHED_FIFO
|| pol
== SCHED_RR
)
601 /* Returns 0 if PR is within the accepted range of priority values for
602 the scheduling policy POL or EINVAL otherwise. */
604 check_sched_priority_attr (int pr
, int pol
)
606 int min
= __sched_get_priority_min (pol
);
607 int max
= __sched_get_priority_max (pol
);
609 if (min
>= 0 && max
>= 0 && pr
>= min
&& pr
<= max
)
615 /* Returns 0 if ST is a valid stack size for a thread stack and EINVAL
618 check_stacksize_attr (size_t st
)
620 if (st
>= PTHREAD_STACK_MIN
)
626 /* Defined in pthread_setaffinity.c. */
627 extern size_t __kernel_cpumask_size attribute_hidden
;
628 extern int __determine_cpumask_size (pid_t tid
);
630 /* Returns 0 if CS and SZ are valid values for the cpuset and cpuset size
631 respectively. Otherwise it returns an error number. */
633 check_cpuset_attr (const cpu_set_t
*cs
, const size_t sz
)
635 if (__kernel_cpumask_size
== 0)
637 int res
= __determine_cpumask_size (THREAD_SELF
->tid
);
642 /* Check whether the new bitmask has any bit set beyond the
643 last one the kernel accepts. */
644 for (size_t cnt
= __kernel_cpumask_size
; cnt
< sz
; ++cnt
)
645 if (((char *) cs
)[cnt
] != '\0')
646 /* Found a nonzero byte. This means the user request cannot be
653 #endif /* pthreadP.h */