1 | /* Copyright (C) 2002-2021 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
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, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _PTHREADP_H |
20 | #define _PTHREADP_H 1 |
21 | |
22 | #define __PTHREAD_NPTL |
23 | |
24 | #include <pthread.h> |
25 | #include <setjmp.h> |
26 | #include <stdbool.h> |
27 | #include <sys/syscall.h> |
28 | #include "descr.h" |
29 | #include <tls.h> |
30 | #include <lowlevellock.h> |
31 | #include <stackinfo.h> |
32 | #include <internaltypes.h> |
33 | #include <pthread-functions.h> |
34 | #include <atomic.h> |
35 | #include <kernel-features.h> |
36 | #include <errno.h> |
37 | #include <internal-signals.h> |
38 | #include "pthread_mutex_conf.h" |
39 | |
40 | |
41 | /* Atomic operations on TLS memory. */ |
42 | #ifndef THREAD_ATOMIC_CMPXCHG_VAL |
43 | # define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \ |
44 | atomic_compare_and_exchange_val_acq (&(descr)->member, new, old) |
45 | #endif |
46 | |
47 | #ifndef THREAD_ATOMIC_BIT_SET |
48 | # define THREAD_ATOMIC_BIT_SET(descr, member, bit) \ |
49 | atomic_bit_set (&(descr)->member, bit) |
50 | #endif |
51 | |
52 | |
53 | static inline short max_adaptive_count (void) |
54 | { |
55 | #if HAVE_TUNABLES |
56 | return __mutex_aconf.spin_count; |
57 | #else |
58 | return DEFAULT_ADAPTIVE_COUNT; |
59 | #endif |
60 | } |
61 | |
62 | |
63 | /* Magic cookie representing robust mutex with dead owner. */ |
64 | #define PTHREAD_MUTEX_INCONSISTENT INT_MAX |
65 | /* Magic cookie representing not recoverable robust mutex. */ |
66 | #define PTHREAD_MUTEX_NOTRECOVERABLE (INT_MAX - 1) |
67 | |
68 | |
69 | /* Internal mutex type value. */ |
70 | enum |
71 | { |
72 | PTHREAD_MUTEX_KIND_MASK_NP = 3, |
73 | |
74 | PTHREAD_MUTEX_ELISION_NP = 256, |
75 | PTHREAD_MUTEX_NO_ELISION_NP = 512, |
76 | |
77 | PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16, |
78 | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP |
79 | = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP, |
80 | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP |
81 | = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP, |
82 | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP |
83 | = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP, |
84 | PTHREAD_MUTEX_PRIO_INHERIT_NP = 32, |
85 | PTHREAD_MUTEX_PI_NORMAL_NP |
86 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL, |
87 | PTHREAD_MUTEX_PI_RECURSIVE_NP |
88 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP, |
89 | PTHREAD_MUTEX_PI_ERRORCHECK_NP |
90 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP, |
91 | PTHREAD_MUTEX_PI_ADAPTIVE_NP |
92 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP, |
93 | PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP |
94 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP, |
95 | PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP |
96 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP, |
97 | PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP |
98 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP, |
99 | PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP |
100 | = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP, |
101 | PTHREAD_MUTEX_PRIO_PROTECT_NP = 64, |
102 | PTHREAD_MUTEX_PP_NORMAL_NP |
103 | = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL, |
104 | PTHREAD_MUTEX_PP_RECURSIVE_NP |
105 | = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP, |
106 | PTHREAD_MUTEX_PP_ERRORCHECK_NP |
107 | = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP, |
108 | PTHREAD_MUTEX_PP_ADAPTIVE_NP |
109 | = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP, |
110 | PTHREAD_MUTEX_ELISION_FLAGS_NP |
111 | = PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP, |
112 | |
113 | PTHREAD_MUTEX_TIMED_ELISION_NP = |
114 | PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP, |
115 | PTHREAD_MUTEX_TIMED_NO_ELISION_NP = |
116 | PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP, |
117 | }; |
118 | #define PTHREAD_MUTEX_PSHARED_BIT 128 |
119 | |
120 | /* See concurrency notes regarding __kind in struct __pthread_mutex_s |
121 | in sysdeps/nptl/bits/thread-shared-types.h. */ |
122 | #define PTHREAD_MUTEX_TYPE(m) \ |
123 | (atomic_load_relaxed (&((m)->__data.__kind)) & 127) |
124 | /* Don't include NO_ELISION, as that type is always the same |
125 | as the underlying lock type. */ |
126 | #define PTHREAD_MUTEX_TYPE_ELISION(m) \ |
127 | (atomic_load_relaxed (&((m)->__data.__kind)) \ |
128 | & (127 | PTHREAD_MUTEX_ELISION_NP)) |
129 | |
130 | #if LLL_PRIVATE == 0 && LLL_SHARED == 128 |
131 | # define PTHREAD_MUTEX_PSHARED(m) \ |
132 | (atomic_load_relaxed (&((m)->__data.__kind)) & 128) |
133 | #else |
134 | # define PTHREAD_MUTEX_PSHARED(m) \ |
135 | ((atomic_load_relaxed (&((m)->__data.__kind)) & 128) \ |
136 | ? LLL_SHARED : LLL_PRIVATE) |
137 | #endif |
138 | |
139 | /* The kernel when waking robust mutexes on exit never uses |
140 | FUTEX_PRIVATE_FLAG FUTEX_WAKE. */ |
141 | #define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED |
142 | |
143 | /* Ceiling in __data.__lock. __data.__lock is signed, so don't |
144 | use the MSB bit in there, but in the mask also include that bit, |
145 | so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK |
146 | masking if the value is then shifted down by |
147 | PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */ |
148 | #define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19 |
149 | #define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000 |
150 | |
151 | |
152 | /* Flags in mutex attr. */ |
153 | #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28 |
154 | #define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000 |
155 | #define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12 |
156 | #define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000 |
157 | #define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000 |
158 | #define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000 |
159 | #define PTHREAD_MUTEXATTR_FLAG_BITS \ |
160 | (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \ |
161 | | PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK) |
162 | |
163 | |
164 | /* For the following, see pthread_rwlock_common.c. */ |
165 | #define PTHREAD_RWLOCK_WRPHASE 1 |
166 | #define PTHREAD_RWLOCK_WRLOCKED 2 |
167 | #define PTHREAD_RWLOCK_RWAITING 4 |
168 | #define PTHREAD_RWLOCK_READER_SHIFT 3 |
169 | #define PTHREAD_RWLOCK_READER_OVERFLOW ((unsigned int) 1 \ |
170 | << (sizeof (unsigned int) * 8 - 1)) |
171 | #define PTHREAD_RWLOCK_WRHANDOVER ((unsigned int) 1 \ |
172 | << (sizeof (unsigned int) * 8 - 1)) |
173 | #define PTHREAD_RWLOCK_FUTEX_USED 2 |
174 | |
175 | |
176 | /* Bits used in robust mutex implementation. */ |
177 | #define FUTEX_WAITERS 0x80000000 |
178 | #define FUTEX_OWNER_DIED 0x40000000 |
179 | #define FUTEX_TID_MASK 0x3fffffff |
180 | |
181 | |
182 | /* pthread_once definitions. See __pthread_once for how these are used. */ |
183 | #define __PTHREAD_ONCE_INPROGRESS 1 |
184 | #define __PTHREAD_ONCE_DONE 2 |
185 | #define __PTHREAD_ONCE_FORK_GEN_INCR 4 |
186 | |
187 | /* Attribute to indicate thread creation was issued from C11 thrd_create. */ |
188 | #define ATTR_C11_THREAD ((void*)(uintptr_t)-1) |
189 | |
190 | |
191 | /* Condition variable definitions. See __pthread_cond_wait_common. |
192 | Need to be defined here so there is one place from which |
193 | nptl_lock_constants can grab them. */ |
194 | #define __PTHREAD_COND_CLOCK_MONOTONIC_MASK 2 |
195 | #define __PTHREAD_COND_SHARED_MASK 1 |
196 | |
197 | |
198 | /* Internal variables. */ |
199 | |
200 | |
201 | /* Default pthread attributes. */ |
202 | extern union pthread_attr_transparent __default_pthread_attr attribute_hidden; |
203 | extern int __default_pthread_attr_lock attribute_hidden; |
204 | /* Called from __libpthread_freeres to deallocate the default attribute. */ |
205 | extern void __default_pthread_attr_freeres (void) attribute_hidden; |
206 | |
207 | /* Size and alignment of static TLS block. */ |
208 | extern size_t __static_tls_size attribute_hidden; |
209 | extern size_t __static_tls_align_m1 attribute_hidden; |
210 | |
211 | /* Attribute handling. */ |
212 | extern struct pthread_attr *__attr_list attribute_hidden; |
213 | extern int __attr_list_lock attribute_hidden; |
214 | |
215 | /* Concurrency handling. */ |
216 | extern int __concurrency_level attribute_hidden; |
217 | |
218 | /* Thread-local data key handling. */ |
219 | extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]; |
220 | hidden_proto (__pthread_keys) |
221 | |
222 | /* Number of threads running. */ |
223 | extern unsigned int __nptl_nthreads attribute_hidden; |
224 | |
225 | #ifndef __ASSUME_SET_ROBUST_LIST |
226 | /* Negative if we do not have the system call and we can use it. */ |
227 | extern int __set_robust_list_avail attribute_hidden; |
228 | #endif |
229 | |
230 | /* Thread Priority Protection. */ |
231 | extern int __sched_fifo_min_prio attribute_hidden; |
232 | extern int __sched_fifo_max_prio attribute_hidden; |
233 | extern void __init_sched_fifo_prio (void) attribute_hidden; |
234 | extern int __pthread_tpp_change_priority (int prev_prio, int new_prio) |
235 | attribute_hidden; |
236 | extern int __pthread_current_priority (void) attribute_hidden; |
237 | |
238 | /* The library can run in debugging mode where it performs a lot more |
239 | tests. */ |
240 | extern int __pthread_debug attribute_hidden; |
241 | /** For now disable debugging support. */ |
242 | #if 0 |
243 | # define DEBUGGING_P __builtin_expect (__pthread_debug, 0) |
244 | # define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL) |
245 | # define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd) |
246 | #else |
247 | # define DEBUGGING_P 0 |
248 | /* Simplified test. This will not catch all invalid descriptors but |
249 | is better than nothing. And if the test triggers the thread |
250 | descriptor is guaranteed to be invalid. */ |
251 | # define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0) |
252 | # define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0) |
253 | #endif |
254 | |
255 | |
256 | /* Cancellation test. */ |
257 | #define CANCELLATION_P(self) \ |
258 | do { \ |
259 | int cancelhandling = THREAD_GETMEM (self, cancelhandling); \ |
260 | if (CANCEL_ENABLED_AND_CANCELED (cancelhandling)) \ |
261 | { \ |
262 | THREAD_SETMEM (self, result, PTHREAD_CANCELED); \ |
263 | __do_cancel (); \ |
264 | } \ |
265 | } while (0) |
266 | |
267 | |
268 | extern void __pthread_unwind (__pthread_unwind_buf_t *__buf) |
269 | __cleanup_fct_attribute __attribute ((__noreturn__)) |
270 | #if !defined SHARED && !IS_IN (libpthread) |
271 | weak_function |
272 | #endif |
273 | ; |
274 | extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf) |
275 | __cleanup_fct_attribute __attribute ((__noreturn__)) |
276 | #ifndef SHARED |
277 | weak_function |
278 | #endif |
279 | ; |
280 | extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf) |
281 | __cleanup_fct_attribute; |
282 | extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf) |
283 | __cleanup_fct_attribute; |
284 | #if IS_IN (libpthread) |
285 | hidden_proto (__pthread_unwind) |
286 | hidden_proto (__pthread_unwind_next) |
287 | hidden_proto (__pthread_register_cancel) |
288 | hidden_proto (__pthread_unregister_cancel) |
289 | # ifdef SHARED |
290 | extern void attribute_hidden pthread_cancel_init (void); |
291 | # endif |
292 | extern void __nptl_unwind_freeres (void) attribute_hidden; |
293 | #endif |
294 | |
295 | |
296 | /* Called when a thread reacts on a cancellation request. */ |
297 | static inline void |
298 | __attribute ((noreturn, always_inline)) |
299 | __do_cancel (void) |
300 | { |
301 | struct pthread *self = THREAD_SELF; |
302 | |
303 | /* Make sure we get no more cancellations. */ |
304 | THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT); |
305 | |
306 | __pthread_unwind ((__pthread_unwind_buf_t *) |
307 | THREAD_GETMEM (self, cleanup_jmp_buf)); |
308 | } |
309 | |
310 | |
311 | /* Internal prototypes. */ |
312 | |
313 | /* Thread list handling. */ |
314 | extern struct pthread *__find_in_stack_list (struct pthread *pd) |
315 | attribute_hidden; |
316 | |
317 | /* Deallocate a thread's stack after optionally making sure the thread |
318 | descriptor is still valid. */ |
319 | extern void __free_tcb (struct pthread *pd) attribute_hidden; |
320 | |
321 | /* Free allocated stack. */ |
322 | extern void __deallocate_stack (struct pthread *pd) attribute_hidden; |
323 | |
324 | /* Mark all the stacks except for the current one as available. This |
325 | function also re-initializes the lock for the stack cache. */ |
326 | extern void __reclaim_stacks (void) attribute_hidden; |
327 | |
328 | /* Make all threads's stacks executable. */ |
329 | extern int __make_stacks_executable (void **stack_endp) attribute_hidden; |
330 | |
331 | /* longjmp handling. */ |
332 | extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe); |
333 | #if IS_IN (libpthread) |
334 | hidden_proto (__pthread_cleanup_upto) |
335 | #endif |
336 | |
337 | |
338 | /* Functions with versioned interfaces. */ |
339 | extern int __pthread_create_2_1 (pthread_t *newthread, |
340 | const pthread_attr_t *attr, |
341 | void *(*start_routine) (void *), void *arg); |
342 | extern int __pthread_create_2_0 (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 | libc_hidden_proto (__pthread_attr_init) |
347 | extern int __pthread_attr_init_2_0 (pthread_attr_t *attr); |
348 | |
349 | |
350 | /* Event handlers for libthread_db interface. */ |
351 | extern void __nptl_create_event (void); |
352 | extern void __nptl_death_event (void); |
353 | hidden_proto (__nptl_create_event) |
354 | hidden_proto (__nptl_death_event) |
355 | |
356 | /* Register the generation counter in the libpthread with the libc. */ |
357 | #ifdef TLS_MULTIPLE_THREADS_IN_TCB |
358 | extern void __libc_pthread_init (unsigned long int *ptr, |
359 | void (*reclaim) (void), |
360 | const struct pthread_functions *functions); |
361 | #else |
362 | extern int *__libc_pthread_init (unsigned long int *ptr, |
363 | void (*reclaim) (void), |
364 | const struct pthread_functions *functions); |
365 | |
366 | /* Variable set to a nonzero value either if more than one thread runs or ran, |
367 | or if a single-threaded process is trying to cancel itself. See |
368 | nptl/descr.h for more context on the single-threaded process case. */ |
369 | extern int __pthread_multiple_threads attribute_hidden; |
370 | /* Pointer to the corresponding variable in libc. */ |
371 | extern int *__libc_multiple_threads_ptr attribute_hidden; |
372 | #endif |
373 | |
374 | extern void __pthread_init_static_tls (struct link_map *) attribute_hidden; |
375 | |
376 | extern size_t __pthread_get_minstack (const pthread_attr_t *attr); |
377 | |
378 | /* Namespace save aliases. */ |
379 | extern int __pthread_getschedparam (pthread_t thread_id, int *policy, |
380 | struct sched_param *param); |
381 | extern int __pthread_setschedparam (pthread_t thread_id, int policy, |
382 | const struct sched_param *param); |
383 | extern int __pthread_setcancelstate (int state, int *oldstate); |
384 | extern int __pthread_mutex_init (pthread_mutex_t *__mutex, |
385 | const pthread_mutexattr_t *__mutexattr); |
386 | extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex); |
387 | extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex); |
388 | extern int __pthread_mutex_lock (pthread_mutex_t *__mutex); |
389 | extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex, |
390 | const struct timespec *__abstime); |
391 | extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex) |
392 | attribute_hidden; |
393 | extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex) |
394 | attribute_hidden; |
395 | extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex); |
396 | extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex, |
397 | int __decr) attribute_hidden; |
398 | extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr); |
399 | extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr); |
400 | extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind); |
401 | extern int __pthread_attr_destroy (pthread_attr_t *attr); |
402 | libc_hidden_proto (__pthread_attr_destroy) |
403 | extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr, |
404 | int *detachstate); |
405 | extern int __pthread_attr_setdetachstate (pthread_attr_t *attr, |
406 | int detachstate); |
407 | extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr, |
408 | int *inherit); |
409 | extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit); |
410 | extern int __pthread_attr_getschedparam (const pthread_attr_t *attr, |
411 | struct sched_param *param); |
412 | extern int __pthread_attr_setschedparam (pthread_attr_t *attr, |
413 | const struct sched_param *param); |
414 | extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr, |
415 | int *policy); |
416 | extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy); |
417 | extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope); |
418 | extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope); |
419 | extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict |
420 | __attr, void **__restrict __stackaddr); |
421 | extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr, |
422 | void *__stackaddr); |
423 | extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict |
424 | __attr, |
425 | size_t *__restrict __stacksize); |
426 | extern int __pthread_attr_setstacksize (pthread_attr_t *__attr, |
427 | size_t __stacksize); |
428 | extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr, |
429 | void **__restrict __stackaddr, |
430 | size_t *__restrict __stacksize); |
431 | extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, |
432 | size_t __stacksize); |
433 | int __pthread_attr_setaffinity_np (pthread_attr_t *, size_t, const cpu_set_t *); |
434 | libc_hidden_proto (__pthread_attr_setaffinity_np) |
435 | extern __typeof (pthread_getattr_default_np) __pthread_getattr_default_np; |
436 | libpthread_hidden_proto (__pthread_getattr_default_np) |
437 | extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock, |
438 | const pthread_rwlockattr_t *__restrict |
439 | __attr); |
440 | extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock); |
441 | extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock); |
442 | extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock); |
443 | extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock); |
444 | extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock); |
445 | extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock); |
446 | extern int __pthread_cond_broadcast (pthread_cond_t *cond); |
447 | extern int __pthread_cond_destroy (pthread_cond_t *cond); |
448 | libc_hidden_proto (__pthread_cond_destroy) |
449 | extern int __pthread_cond_init (pthread_cond_t *cond, |
450 | const pthread_condattr_t *cond_attr); |
451 | libc_hidden_proto (__pthread_cond_init) |
452 | extern int __pthread_cond_signal (pthread_cond_t *cond); |
453 | extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex); |
454 | |
455 | #if __TIMESIZE == 64 |
456 | # define __pthread_clockjoin_np64 __pthread_clockjoin_np |
457 | # define __pthread_timedjoin_np64 __pthread_timedjoin_np |
458 | # define __pthread_cond_timedwait64 __pthread_cond_timedwait |
459 | # define __pthread_cond_clockwait64 __pthread_cond_clockwait |
460 | # define __pthread_rwlock_clockrdlock64 __pthread_rwlock_clockrdlock |
461 | # define __pthread_rwlock_clockwrlock64 __pthread_rwlock_clockwrlock |
462 | # define __pthread_rwlock_timedrdlock64 __pthread_rwlock_timedrdlock |
463 | # define __pthread_rwlock_timedwrlock64 __pthread_rwlock_timedwrlock |
464 | # define __pthread_mutex_clocklock64 __pthread_mutex_clocklock |
465 | # define __pthread_mutex_timedlock64 __pthread_mutex_timedlock |
466 | #else |
467 | extern int __pthread_clockjoin_np64 (pthread_t threadid, void **thread_return, |
468 | clockid_t clockid, |
469 | const struct __timespec64 *abstime); |
470 | libc_hidden_proto (__pthread_clockjoin_np64) |
471 | extern int __pthread_timedjoin_np64 (pthread_t threadid, void **thread_return, |
472 | const struct __timespec64 *abstime); |
473 | libc_hidden_proto (__pthread_timedjoin_np64) |
474 | extern int __pthread_cond_timedwait64 (pthread_cond_t *cond, |
475 | pthread_mutex_t *mutex, |
476 | const struct __timespec64 *abstime); |
477 | libpthread_hidden_proto (__pthread_cond_timedwait64) |
478 | extern int __pthread_cond_clockwait64 (pthread_cond_t *cond, |
479 | pthread_mutex_t *mutex, |
480 | clockid_t clockid, |
481 | const struct __timespec64 *abstime); |
482 | libpthread_hidden_proto (__pthread_cond_clockwait64) |
483 | extern int __pthread_rwlock_clockrdlock64 (pthread_rwlock_t *rwlock, |
484 | clockid_t clockid, |
485 | const struct __timespec64 *abstime); |
486 | libpthread_hidden_proto (__pthread_rwlock_clockrdlock64) |
487 | extern int __pthread_rwlock_clockwrlock64 (pthread_rwlock_t *rwlock, |
488 | clockid_t clockid, |
489 | const struct __timespec64 *abstime); |
490 | libpthread_hidden_proto (__pthread_rwlock_clockwrlock64) |
491 | extern int __pthread_rwlock_timedrdlock64 (pthread_rwlock_t *rwlock, |
492 | const struct __timespec64 *abstime); |
493 | libpthread_hidden_proto (__pthread_rwlock_timedrdlock64) |
494 | extern int __pthread_rwlock_timedwrlock64 (pthread_rwlock_t *rwlock, |
495 | const struct __timespec64 *abstime); |
496 | libpthread_hidden_proto (__pthread_rwlock_timedwrlock64) |
497 | extern int __pthread_mutex_clocklock64 (pthread_mutex_t *mutex, |
498 | clockid_t clockid, |
499 | const struct __timespec64 *abstime); |
500 | libpthread_hidden_proto (__pthread_mutex_clocklock64) |
501 | extern int __pthread_mutex_timedlock64 (pthread_mutex_t *mutex, |
502 | const struct __timespec64 *abstime); |
503 | libpthread_hidden_proto (__pthread_mutex_timedlock64) |
504 | #endif |
505 | |
506 | extern int __pthread_cond_timedwait (pthread_cond_t *cond, |
507 | pthread_mutex_t *mutex, |
508 | const struct timespec *abstime); |
509 | extern int __pthread_cond_clockwait (pthread_cond_t *cond, |
510 | pthread_mutex_t *mutex, |
511 | clockid_t clockid, |
512 | const struct timespec *abstime) |
513 | __nonnull ((1, 2, 4)); |
514 | extern int __pthread_condattr_destroy (pthread_condattr_t *attr); |
515 | extern int __pthread_condattr_init (pthread_condattr_t *attr); |
516 | extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *)); |
517 | extern int __pthread_key_delete (pthread_key_t key); |
518 | extern void *__pthread_getspecific (pthread_key_t key); |
519 | extern int __pthread_setspecific (pthread_key_t key, const void *value); |
520 | extern int __pthread_once (pthread_once_t *once_control, |
521 | void (*init_routine) (void)); |
522 | extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void), |
523 | void (*child) (void)); |
524 | extern pthread_t __pthread_self (void); |
525 | extern int __pthread_equal (pthread_t thread1, pthread_t thread2); |
526 | extern int __pthread_detach (pthread_t th); |
527 | extern int __pthread_cancel (pthread_t th); |
528 | extern int __pthread_kill (pthread_t threadid, int signo); |
529 | extern void __pthread_exit (void *value) __attribute__ ((__noreturn__)); |
530 | extern int __pthread_join (pthread_t threadid, void **thread_return); |
531 | extern int __pthread_setcanceltype (int type, int *oldtype); |
532 | extern int __pthread_enable_asynccancel (void) attribute_hidden; |
533 | extern void __pthread_disable_asynccancel (int oldtype) attribute_hidden; |
534 | extern void __pthread_testcancel (void); |
535 | extern int __pthread_clockjoin_ex (pthread_t, void **, clockid_t, |
536 | const struct __timespec64 *, bool) |
537 | attribute_hidden; |
538 | extern int __pthread_sigmask (int, const sigset_t *, sigset_t *); |
539 | libc_hidden_proto (__pthread_sigmask); |
540 | |
541 | |
542 | #if IS_IN (libpthread) |
543 | hidden_proto (__pthread_mutex_init) |
544 | hidden_proto (__pthread_mutex_destroy) |
545 | hidden_proto (__pthread_mutex_lock) |
546 | hidden_proto (__pthread_mutex_trylock) |
547 | hidden_proto (__pthread_mutex_unlock) |
548 | hidden_proto (__pthread_rwlock_rdlock) |
549 | hidden_proto (__pthread_rwlock_wrlock) |
550 | hidden_proto (__pthread_rwlock_unlock) |
551 | hidden_proto (__pthread_key_create) |
552 | hidden_proto (__pthread_getspecific) |
553 | hidden_proto (__pthread_setspecific) |
554 | hidden_proto (__pthread_once) |
555 | hidden_proto (__pthread_setcancelstate) |
556 | hidden_proto (__pthread_testcancel) |
557 | hidden_proto (__pthread_mutexattr_init) |
558 | hidden_proto (__pthread_mutexattr_settype) |
559 | #endif |
560 | |
561 | extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond); |
562 | extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond); |
563 | extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond, |
564 | const pthread_condattr_t *cond_attr); |
565 | extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond); |
566 | extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond, |
567 | pthread_mutex_t *mutex, |
568 | const struct timespec *abstime); |
569 | extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond, |
570 | pthread_mutex_t *mutex); |
571 | |
572 | extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize, |
573 | cpu_set_t *cpuset); |
574 | libc_hidden_proto (__pthread_getaffinity_np) |
575 | |
576 | /* Special internal version of pthread_attr_setsigmask_np which does |
577 | not filter out internal signals from *SIGMASK. This can be used to |
578 | launch threads with internal signals blocked. */ |
579 | extern int __pthread_attr_setsigmask_internal (pthread_attr_t *attr, |
580 | const sigset_t *sigmask); |
581 | libc_hidden_proto (__pthread_attr_setsigmask_internal) |
582 | |
583 | extern __typeof (pthread_attr_getsigmask_np) __pthread_attr_getsigmask_np; |
584 | libc_hidden_proto (__pthread_attr_getsigmask_np) |
585 | |
586 | #if IS_IN (libpthread) |
587 | /* Special versions which use non-exported functions. */ |
588 | extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer, |
589 | void (*routine) (void *), void *arg) |
590 | attribute_hidden; |
591 | |
592 | /* Replace cleanup macros defined in <pthread.h> with internal |
593 | versions that don't depend on unwind info and better support |
594 | cancellation. */ |
595 | # undef pthread_cleanup_push |
596 | # define pthread_cleanup_push(routine,arg) \ |
597 | { struct _pthread_cleanup_buffer _buffer; \ |
598 | __pthread_cleanup_push (&_buffer, (routine), (arg)); |
599 | |
600 | extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer, |
601 | int execute) attribute_hidden; |
602 | # undef pthread_cleanup_pop |
603 | # define pthread_cleanup_pop(execute) \ |
604 | __pthread_cleanup_pop (&_buffer, (execute)); } |
605 | #endif |
606 | |
607 | extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer, |
608 | void (*routine) (void *), void *arg); |
609 | extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer, |
610 | int execute); |
611 | |
612 | /* Old cleanup interfaces, still used in libc.so. */ |
613 | extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer, |
614 | void (*routine) (void *), void *arg); |
615 | extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer, |
616 | int execute); |
617 | extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer, |
618 | void (*routine) (void *), void *arg); |
619 | extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer, |
620 | int execute); |
621 | |
622 | extern void __nptl_deallocate_tsd (void) attribute_hidden; |
623 | |
624 | extern void __nptl_setxid_error (struct xid_command *cmdp, int error) |
625 | attribute_hidden; |
626 | extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden; |
627 | #ifndef SHARED |
628 | extern void __nptl_set_robust (struct pthread *self); |
629 | #endif |
630 | |
631 | extern void __nptl_stacks_freeres (void) attribute_hidden; |
632 | extern void __shm_directory_freeres (void) attribute_hidden; |
633 | |
634 | extern void __wait_lookup_done (void) attribute_hidden; |
635 | |
636 | /* Allocates the extension space for ATTR. Returns an error code on |
637 | memory allocation failure, zero on success. If ATTR already has an |
638 | extension space, this function does nothing. */ |
639 | int __pthread_attr_extension (struct pthread_attr *attr) attribute_hidden |
640 | __attribute_warn_unused_result__; |
641 | |
642 | #ifdef SHARED |
643 | # define PTHREAD_STATIC_FN_REQUIRE(name) |
644 | #else |
645 | # define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name); |
646 | #endif |
647 | |
648 | /* Make a deep copy of the attribute *SOURCE in *TARGET. *TARGET is |
649 | not assumed to have been initialized. Returns 0 on success, or a |
650 | positive error code otherwise. */ |
651 | int __pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source); |
652 | libc_hidden_proto (__pthread_attr_copy) |
653 | |
654 | /* Returns 0 if POL is a valid scheduling policy. */ |
655 | static inline int |
656 | check_sched_policy_attr (int pol) |
657 | { |
658 | if (pol == SCHED_OTHER || pol == SCHED_FIFO || pol == SCHED_RR) |
659 | return 0; |
660 | |
661 | return EINVAL; |
662 | } |
663 | |
664 | /* Returns 0 if PR is within the accepted range of priority values for |
665 | the scheduling policy POL or EINVAL otherwise. */ |
666 | static inline int |
667 | check_sched_priority_attr (int pr, int pol) |
668 | { |
669 | int min = __sched_get_priority_min (pol); |
670 | int max = __sched_get_priority_max (pol); |
671 | |
672 | if (min >= 0 && max >= 0 && pr >= min && pr <= max) |
673 | return 0; |
674 | |
675 | return EINVAL; |
676 | } |
677 | |
678 | /* Returns 0 if ST is a valid stack size for a thread stack and EINVAL |
679 | otherwise. */ |
680 | static inline int |
681 | check_stacksize_attr (size_t st) |
682 | { |
683 | if (st >= PTHREAD_STACK_MIN) |
684 | return 0; |
685 | |
686 | return EINVAL; |
687 | } |
688 | |
689 | #define ASSERT_TYPE_SIZE(type, size) \ |
690 | _Static_assert (sizeof (type) == size, \ |
691 | "sizeof (" #type ") != " #size) |
692 | |
693 | #define ASSERT_PTHREAD_INTERNAL_SIZE(type, internal) \ |
694 | _Static_assert (sizeof ((type) { { 0 } }).__size >= sizeof (internal),\ |
695 | "sizeof (" #type ".__size) < sizeof (" #internal ")") |
696 | |
697 | #define ASSERT_PTHREAD_STRING(x) __STRING (x) |
698 | #define ASSERT_PTHREAD_INTERNAL_OFFSET(type, member, offset) \ |
699 | _Static_assert (offsetof (type, member) == offset, \ |
700 | "offset of " #member " field of " #type " != " \ |
701 | ASSERT_PTHREAD_STRING (offset)) |
702 | #define ASSERT_PTHREAD_INTERNAL_MEMBER_SIZE(type, member, mtype) \ |
703 | _Static_assert (sizeof (((type) { 0 }).member) != 8, \ |
704 | "sizeof (" #type "." #member ") != sizeof (" #mtype "))") |
705 | |
706 | #endif /* pthreadP.h */ |
707 | |