1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
2 | /* Compile this one with gcc. */ |
3 | /* Copyright (C) 1997-2024 Free Software Foundation, Inc. |
4 | |
5 | This file is part of GCC. |
6 | |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free |
9 | Software Foundation; either version 3, or (at your option) any later |
10 | version. |
11 | |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
15 | for more details. |
16 | |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version |
19 | 3.1, as published by the Free Software Foundation. |
20 | |
21 | You should have received a copy of the GNU General Public License and |
22 | a copy of the GCC Runtime Library Exception along with this program; |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
24 | <http://www.gnu.org/licenses/>. */ |
25 | |
26 | #ifndef _GLIBCXX_GCC_GTHR_POSIX_H |
27 | #define _GLIBCXX_GCC_GTHR_POSIX_H |
28 | |
29 | /* POSIX threads specific definitions. |
30 | Easy, since the interface is just one-to-one mapping. */ |
31 | |
32 | #define __GTHREADS 1 |
33 | #define __GTHREADS_CXX0X 1 |
34 | |
35 | #include <pthread.h> |
36 | |
37 | #if ((defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)) \ |
38 | || !defined(_GTHREAD_USE_MUTEX_TIMEDLOCK)) |
39 | # include <unistd.h> |
40 | # if defined(_POSIX_TIMEOUTS) && _POSIX_TIMEOUTS >= 0 |
41 | # define _GTHREAD_USE_MUTEX_TIMEDLOCK 1 |
42 | # else |
43 | # define _GTHREAD_USE_MUTEX_TIMEDLOCK 0 |
44 | # endif |
45 | #endif |
46 | |
47 | typedef pthread_t __gthread_t; |
48 | typedef pthread_key_t __gthread_key_t; |
49 | typedef pthread_once_t __gthread_once_t; |
50 | typedef pthread_mutex_t __gthread_mutex_t; |
51 | #ifndef __cplusplus |
52 | typedef pthread_rwlock_t __gthread_rwlock_t; |
53 | #endif |
54 | typedef pthread_mutex_t __gthread_recursive_mutex_t; |
55 | typedef pthread_cond_t __gthread_cond_t; |
56 | typedef struct timespec __gthread_time_t; |
57 | |
58 | /* POSIX like conditional variables are supported. Please look at comments |
59 | in gthr.h for details. */ |
60 | #define __GTHREAD_HAS_COND 1 |
61 | |
62 | #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
63 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
64 | #ifndef __cplusplus |
65 | #define __GTHREAD_RWLOCK_INIT PTHREAD_RWLOCK_INITIALIZER |
66 | #endif |
67 | #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT |
68 | #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER) |
69 | #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER |
70 | #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) |
71 | #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP |
72 | #else |
73 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
74 | #endif |
75 | #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER |
76 | #define __GTHREAD_TIME_INIT {0,0} |
77 | |
78 | #ifdef _GTHREAD_USE_MUTEX_INIT_FUNC |
79 | # undef __GTHREAD_MUTEX_INIT |
80 | #endif |
81 | #ifdef _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC |
82 | # undef __GTHREAD_RECURSIVE_MUTEX_INIT |
83 | # undef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION |
84 | # define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
85 | #endif |
86 | #ifdef _GTHREAD_USE_COND_INIT_FUNC |
87 | # undef __GTHREAD_COND_INIT |
88 | # define __GTHREAD_COND_INIT_FUNCTION __gthread_cond_init_function |
89 | #endif |
90 | |
91 | #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK |
92 | # ifndef __gthrw_pragma |
93 | # define __gthrw_pragma(pragma) |
94 | # endif |
95 | # define __gthrw2(name,name2,type) \ |
96 | static __typeof(type) name \ |
97 | __attribute__ ((__weakref__(#name2), __copy__ (type))); \ |
98 | __gthrw_pragma(weak type) |
99 | # define __gthrw_(name) __gthrw_ ## name |
100 | #else |
101 | # define __gthrw2(name,name2,type) |
102 | # define __gthrw_(name) name |
103 | #endif |
104 | |
105 | /* Typically, __gthrw_foo is a weak reference to symbol foo. */ |
106 | #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name) |
107 | |
108 | __gthrw(pthread_once) |
109 | __gthrw(pthread_getspecific) |
110 | __gthrw(pthread_setspecific) |
111 | |
112 | __gthrw(pthread_create) |
113 | __gthrw(pthread_join) |
114 | __gthrw(pthread_equal) |
115 | __gthrw(pthread_self) |
116 | __gthrw(pthread_detach) |
117 | #ifndef __BIONIC__ |
118 | __gthrw(pthread_cancel) |
119 | #endif |
120 | __gthrw(sched_yield) |
121 | |
122 | __gthrw(pthread_mutex_lock) |
123 | __gthrw(pthread_mutex_trylock) |
124 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
125 | __gthrw(pthread_mutex_timedlock) |
126 | #endif |
127 | __gthrw(pthread_mutex_unlock) |
128 | __gthrw(pthread_mutex_init) |
129 | __gthrw(pthread_mutex_destroy) |
130 | |
131 | __gthrw(pthread_cond_init) |
132 | __gthrw(pthread_cond_broadcast) |
133 | __gthrw(pthread_cond_signal) |
134 | __gthrw(pthread_cond_wait) |
135 | __gthrw(pthread_cond_timedwait) |
136 | __gthrw(pthread_cond_destroy) |
137 | |
138 | __gthrw(pthread_key_create) |
139 | __gthrw(pthread_key_delete) |
140 | __gthrw(pthread_mutexattr_init) |
141 | __gthrw(pthread_mutexattr_settype) |
142 | __gthrw(pthread_mutexattr_destroy) |
143 | |
144 | #ifndef __cplusplus |
145 | __gthrw(pthread_rwlock_rdlock) |
146 | __gthrw(pthread_rwlock_tryrdlock) |
147 | __gthrw(pthread_rwlock_wrlock) |
148 | __gthrw(pthread_rwlock_trywrlock) |
149 | __gthrw(pthread_rwlock_unlock) |
150 | #endif |
151 | |
152 | #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK) |
153 | /* Objective-C. */ |
154 | __gthrw(pthread_exit) |
155 | #ifdef _POSIX_PRIORITY_SCHEDULING |
156 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
157 | __gthrw(sched_get_priority_max) |
158 | __gthrw(sched_get_priority_min) |
159 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
160 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
161 | __gthrw(pthread_attr_destroy) |
162 | __gthrw(pthread_attr_init) |
163 | __gthrw(pthread_attr_setdetachstate) |
164 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
165 | __gthrw(pthread_getschedparam) |
166 | __gthrw(pthread_setschedparam) |
167 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
168 | #endif /* _LIBOBJC || _LIBOBJC_WEAK */ |
169 | |
170 | #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK |
171 | |
172 | /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if |
173 | -pthreads is not specified. The functions are dummies and most return an |
174 | error value. However pthread_once returns 0 without invoking the routine |
175 | it is passed so we cannot pretend that the interface is active if -pthreads |
176 | is not specified. On Solaris 2.5.1, the interface is not exposed at all so |
177 | we need to play the usual game with weak symbols. On Solaris 10 and up, a |
178 | working interface is always exposed. On FreeBSD 6 and later, libc also |
179 | exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up |
180 | to 9 does. FreeBSD >= 700014 even provides a pthread_cancel stub in libc, |
181 | which means the alternate __gthread_active_p below cannot be used there. */ |
182 | |
183 | #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__)) |
184 | |
185 | static volatile int __gthread_active = -1; |
186 | |
187 | static void |
188 | __gthread_trigger (void) |
189 | { |
190 | __gthread_active = 1; |
191 | } |
192 | |
193 | static inline int |
194 | __gthread_active_p (void) |
195 | { |
196 | static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER; |
197 | static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT; |
198 | |
199 | /* Avoid reading __gthread_active twice on the main code path. */ |
200 | int __gthread_active_latest_value = __gthread_active; |
201 | |
202 | /* This test is not protected to avoid taking a lock on the main code |
203 | path so every update of __gthread_active in a threaded program must |
204 | be atomic with regard to the result of the test. */ |
205 | if (__builtin_expect (__gthread_active_latest_value < 0, 0)) |
206 | { |
207 | if (__gthrw_(pthread_once)) |
208 | { |
209 | /* If this really is a threaded program, then we must ensure that |
210 | __gthread_active has been set to 1 before exiting this block. */ |
211 | __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex); |
212 | __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger); |
213 | __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex); |
214 | } |
215 | |
216 | /* Make sure we'll never enter this block again. */ |
217 | if (__gthread_active < 0) |
218 | __gthread_active = 0; |
219 | |
220 | __gthread_active_latest_value = __gthread_active; |
221 | } |
222 | |
223 | return __gthread_active_latest_value != 0; |
224 | } |
225 | |
226 | #else /* neither FreeBSD nor Solaris */ |
227 | |
228 | /* For a program to be multi-threaded the only thing that it certainly must |
229 | be using is pthread_create. However, there may be other libraries that |
230 | intercept pthread_create with their own definitions to wrap pthreads |
231 | functionality for some purpose. In those cases, pthread_create being |
232 | defined might not necessarily mean that libpthread is actually linked |
233 | in. |
234 | |
235 | For the GNU C library, we can use a known internal name. This is always |
236 | available in the ABI, but no other library would define it. That is |
237 | ideal, since any public pthread function might be intercepted just as |
238 | pthread_create might be. __pthread_key_create is an "internal" |
239 | implementation symbol, but it is part of the public exported ABI. Also, |
240 | it's among the symbols that the static libpthread.a always links in |
241 | whenever pthread_create is used, so there is no danger of a false |
242 | negative result in any statically-linked, multi-threaded program. |
243 | |
244 | For others, we choose pthread_cancel as a function that seems unlikely |
245 | to be redefined by an interceptor library. The bionic (Android) C |
246 | library does not provide pthread_cancel, so we do use pthread_create |
247 | there (and interceptor libraries lose). */ |
248 | |
249 | #ifdef __GLIBC__ |
250 | __gthrw2(__gthrw_(__pthread_key_create), |
251 | __pthread_key_create, |
252 | pthread_key_create) |
253 | # define GTHR_ACTIVE_PROXY __gthrw_(__pthread_key_create) |
254 | #elif defined (__BIONIC__) |
255 | # define GTHR_ACTIVE_PROXY __gthrw_(pthread_create) |
256 | #else |
257 | # define GTHR_ACTIVE_PROXY __gthrw_(pthread_cancel) |
258 | #endif |
259 | |
260 | static inline int |
261 | __gthread_active_p (void) |
262 | { |
263 | static void *const __gthread_active_ptr |
264 | = __extension__ (void *) >HR_ACTIVE_PROXY; |
265 | return __gthread_active_ptr != 0; |
266 | } |
267 | |
268 | #endif /* FreeBSD or Solaris */ |
269 | |
270 | #else /* not __GXX_WEAK__ */ |
271 | |
272 | /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread |
273 | calls in shared flavors of the HP-UX C library. Most of the stubs |
274 | have no functionality. The details are described in the "libc cumulative |
275 | patch" for each subversion of HP-UX 11. There are two special interfaces |
276 | provided for checking whether an application is linked to a shared pthread |
277 | library or not. However, these interfaces aren't available in early |
278 | libpthread libraries. We also need a test that works for archive |
279 | libraries. We can't use pthread_once as some libc versions call the |
280 | init function. We also can't use pthread_create or pthread_attr_init |
281 | as these create a thread and thereby prevent changing the default stack |
282 | size. The function pthread_default_stacksize_np is available in both |
283 | the archive and shared versions of libpthread. It can be used to |
284 | determine the default pthread stack size. There is a stub in some |
285 | shared libc versions which returns a zero size if pthreads are not |
286 | active. We provide an equivalent stub to handle cases where libc |
287 | doesn't provide one. */ |
288 | |
289 | #if defined(__hppa__) && defined(__hpux__) |
290 | |
291 | static volatile int __gthread_active = -1; |
292 | |
293 | static inline int |
294 | __gthread_active_p (void) |
295 | { |
296 | /* Avoid reading __gthread_active twice on the main code path. */ |
297 | int __gthread_active_latest_value = __gthread_active; |
298 | size_t __s; |
299 | |
300 | if (__builtin_expect (__gthread_active_latest_value < 0, 0)) |
301 | { |
302 | pthread_default_stacksize_np (0, &__s); |
303 | __gthread_active = __s ? 1 : 0; |
304 | __gthread_active_latest_value = __gthread_active; |
305 | } |
306 | |
307 | return __gthread_active_latest_value != 0; |
308 | } |
309 | |
310 | #else /* not hppa-hpux */ |
311 | |
312 | static inline int |
313 | __gthread_active_p (void) |
314 | { |
315 | return 1; |
316 | } |
317 | |
318 | #endif /* hppa-hpux */ |
319 | |
320 | #endif /* __GXX_WEAK__ */ |
321 | |
322 | #ifdef _LIBOBJC |
323 | |
324 | /* This is the config.h file in libobjc/ */ |
325 | #include <config.h> |
326 | |
327 | #ifdef HAVE_SCHED_H |
328 | # include <sched.h> |
329 | #endif |
330 | |
331 | /* Key structure for maintaining thread specific storage */ |
332 | static pthread_key_t _objc_thread_storage; |
333 | static pthread_attr_t _objc_thread_attribs; |
334 | |
335 | /* Thread local storage for a single thread */ |
336 | static void *thread_local_storage = NULL; |
337 | |
338 | /* Backend initialization functions */ |
339 | |
340 | /* Initialize the threads subsystem. */ |
341 | static inline int |
342 | __gthread_objc_init_thread_system (void) |
343 | { |
344 | if (__gthread_active_p ()) |
345 | { |
346 | /* Initialize the thread storage key. */ |
347 | if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0) |
348 | { |
349 | /* The normal default detach state for threads is |
350 | * PTHREAD_CREATE_JOINABLE which causes threads to not die |
351 | * when you think they should. */ |
352 | if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0 |
353 | && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs, |
354 | PTHREAD_CREATE_DETACHED) == 0) |
355 | return 0; |
356 | } |
357 | } |
358 | |
359 | return -1; |
360 | } |
361 | |
362 | /* Close the threads subsystem. */ |
363 | static inline int |
364 | __gthread_objc_close_thread_system (void) |
365 | { |
366 | if (__gthread_active_p () |
367 | && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0 |
368 | && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0) |
369 | return 0; |
370 | |
371 | return -1; |
372 | } |
373 | |
374 | /* Backend thread functions */ |
375 | |
376 | /* Create a new thread of execution. */ |
377 | static inline objc_thread_t |
378 | __gthread_objc_thread_detach (void (*func)(void *), void *arg) |
379 | { |
380 | objc_thread_t thread_id; |
381 | pthread_t new_thread_handle; |
382 | |
383 | if (!__gthread_active_p ()) |
384 | return NULL; |
385 | |
386 | if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs, |
387 | (void *) func, arg))) |
388 | thread_id = (objc_thread_t) new_thread_handle; |
389 | else |
390 | thread_id = NULL; |
391 | |
392 | return thread_id; |
393 | } |
394 | |
395 | /* Set the current thread's priority. */ |
396 | static inline int |
397 | __gthread_objc_thread_set_priority (int priority) |
398 | { |
399 | if (!__gthread_active_p ()) |
400 | return -1; |
401 | else |
402 | { |
403 | #ifdef _POSIX_PRIORITY_SCHEDULING |
404 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
405 | pthread_t thread_id = __gthrw_(pthread_self) (); |
406 | int policy; |
407 | struct sched_param params; |
408 | int priority_min, priority_max; |
409 | |
410 | if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0) |
411 | { |
412 | if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1) |
413 | return -1; |
414 | |
415 | if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1) |
416 | return -1; |
417 | |
418 | if (priority > priority_max) |
419 | priority = priority_max; |
420 | else if (priority < priority_min) |
421 | priority = priority_min; |
422 | params.sched_priority = priority; |
423 | |
424 | /* |
425 | * The solaris 7 and several other man pages incorrectly state that |
426 | * this should be a pointer to policy but pthread.h is universally |
427 | * at odds with this. |
428 | */ |
429 | if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0) |
430 | return 0; |
431 | } |
432 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
433 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
434 | return -1; |
435 | } |
436 | } |
437 | |
438 | /* Return the current thread's priority. */ |
439 | static inline int |
440 | __gthread_objc_thread_get_priority (void) |
441 | { |
442 | #ifdef _POSIX_PRIORITY_SCHEDULING |
443 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
444 | if (__gthread_active_p ()) |
445 | { |
446 | int policy; |
447 | struct sched_param params; |
448 | |
449 | if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0) |
450 | return params.sched_priority; |
451 | else |
452 | return -1; |
453 | } |
454 | else |
455 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
456 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
457 | return OBJC_THREAD_INTERACTIVE_PRIORITY; |
458 | } |
459 | |
460 | /* Yield our process time to another thread. */ |
461 | static inline void |
462 | __gthread_objc_thread_yield (void) |
463 | { |
464 | if (__gthread_active_p ()) |
465 | __gthrw_(sched_yield) (); |
466 | } |
467 | |
468 | /* Terminate the current thread. */ |
469 | static inline int |
470 | __gthread_objc_thread_exit (void) |
471 | { |
472 | if (__gthread_active_p ()) |
473 | /* exit the thread */ |
474 | __gthrw_(pthread_exit) (&__objc_thread_exit_status); |
475 | |
476 | /* Failed if we reached here */ |
477 | return -1; |
478 | } |
479 | |
480 | /* Returns an integer value which uniquely describes a thread. */ |
481 | static inline objc_thread_t |
482 | __gthread_objc_thread_id (void) |
483 | { |
484 | if (__gthread_active_p ()) |
485 | return (objc_thread_t) __gthrw_(pthread_self) (); |
486 | else |
487 | return (objc_thread_t) 1; |
488 | } |
489 | |
490 | /* Sets the thread's local storage pointer. */ |
491 | static inline int |
492 | __gthread_objc_thread_set_data (void *value) |
493 | { |
494 | if (__gthread_active_p ()) |
495 | return __gthrw_(pthread_setspecific) (_objc_thread_storage, value); |
496 | else |
497 | { |
498 | thread_local_storage = value; |
499 | return 0; |
500 | } |
501 | } |
502 | |
503 | /* Returns the thread's local storage pointer. */ |
504 | static inline void * |
505 | __gthread_objc_thread_get_data (void) |
506 | { |
507 | if (__gthread_active_p ()) |
508 | return __gthrw_(pthread_getspecific) (_objc_thread_storage); |
509 | else |
510 | return thread_local_storage; |
511 | } |
512 | |
513 | /* Backend mutex functions */ |
514 | |
515 | /* Allocate a mutex. */ |
516 | static inline int |
517 | __gthread_objc_mutex_allocate (objc_mutex_t mutex) |
518 | { |
519 | if (__gthread_active_p ()) |
520 | { |
521 | mutex->backend = objc_malloc (sizeof (pthread_mutex_t)); |
522 | |
523 | if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL)) |
524 | { |
525 | objc_free (mutex->backend); |
526 | mutex->backend = NULL; |
527 | return -1; |
528 | } |
529 | } |
530 | |
531 | return 0; |
532 | } |
533 | |
534 | /* Deallocate a mutex. */ |
535 | static inline int |
536 | __gthread_objc_mutex_deallocate (objc_mutex_t mutex) |
537 | { |
538 | if (__gthread_active_p ()) |
539 | { |
540 | int count; |
541 | |
542 | /* |
543 | * Posix Threads specifically require that the thread be unlocked |
544 | * for __gthrw_(pthread_mutex_destroy) to work. |
545 | */ |
546 | |
547 | do |
548 | { |
549 | count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend); |
550 | if (count < 0) |
551 | return -1; |
552 | } |
553 | while (count); |
554 | |
555 | if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend)) |
556 | return -1; |
557 | |
558 | objc_free (mutex->backend); |
559 | mutex->backend = NULL; |
560 | } |
561 | return 0; |
562 | } |
563 | |
564 | /* Grab a lock on a mutex. */ |
565 | static inline int |
566 | __gthread_objc_mutex_lock (objc_mutex_t mutex) |
567 | { |
568 | if (__gthread_active_p () |
569 | && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0) |
570 | { |
571 | return -1; |
572 | } |
573 | |
574 | return 0; |
575 | } |
576 | |
577 | /* Try to grab a lock on a mutex. */ |
578 | static inline int |
579 | __gthread_objc_mutex_trylock (objc_mutex_t mutex) |
580 | { |
581 | if (__gthread_active_p () |
582 | && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0) |
583 | { |
584 | return -1; |
585 | } |
586 | |
587 | return 0; |
588 | } |
589 | |
590 | /* Unlock the mutex */ |
591 | static inline int |
592 | __gthread_objc_mutex_unlock (objc_mutex_t mutex) |
593 | { |
594 | if (__gthread_active_p () |
595 | && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0) |
596 | { |
597 | return -1; |
598 | } |
599 | |
600 | return 0; |
601 | } |
602 | |
603 | /* Backend condition mutex functions */ |
604 | |
605 | /* Allocate a condition. */ |
606 | static inline int |
607 | __gthread_objc_condition_allocate (objc_condition_t condition) |
608 | { |
609 | if (__gthread_active_p ()) |
610 | { |
611 | condition->backend = objc_malloc (sizeof (pthread_cond_t)); |
612 | |
613 | if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL)) |
614 | { |
615 | objc_free (condition->backend); |
616 | condition->backend = NULL; |
617 | return -1; |
618 | } |
619 | } |
620 | |
621 | return 0; |
622 | } |
623 | |
624 | /* Deallocate a condition. */ |
625 | static inline int |
626 | __gthread_objc_condition_deallocate (objc_condition_t condition) |
627 | { |
628 | if (__gthread_active_p ()) |
629 | { |
630 | if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend)) |
631 | return -1; |
632 | |
633 | objc_free (condition->backend); |
634 | condition->backend = NULL; |
635 | } |
636 | return 0; |
637 | } |
638 | |
639 | /* Wait on the condition */ |
640 | static inline int |
641 | __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) |
642 | { |
643 | if (__gthread_active_p ()) |
644 | return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend, |
645 | (pthread_mutex_t *) mutex->backend); |
646 | else |
647 | return 0; |
648 | } |
649 | |
650 | /* Wake up all threads waiting on this condition. */ |
651 | static inline int |
652 | __gthread_objc_condition_broadcast (objc_condition_t condition) |
653 | { |
654 | if (__gthread_active_p ()) |
655 | return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend); |
656 | else |
657 | return 0; |
658 | } |
659 | |
660 | /* Wake up one thread waiting on this condition. */ |
661 | static inline int |
662 | __gthread_objc_condition_signal (objc_condition_t condition) |
663 | { |
664 | if (__gthread_active_p ()) |
665 | return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend); |
666 | else |
667 | return 0; |
668 | } |
669 | |
670 | #else /* _LIBOBJC */ |
671 | |
672 | static inline int |
673 | __gthread_create (__gthread_t *__threadid, void *(*__func) (void*), |
674 | void *__args) |
675 | { |
676 | return __gthrw_(pthread_create) (__threadid, NULL, __func, __args); |
677 | } |
678 | |
679 | static inline int |
680 | __gthread_join (__gthread_t __threadid, void **__value_ptr) |
681 | { |
682 | return __gthrw_(pthread_join) (__threadid, __value_ptr); |
683 | } |
684 | |
685 | static inline int |
686 | __gthread_detach (__gthread_t __threadid) |
687 | { |
688 | return __gthrw_(pthread_detach) (__threadid); |
689 | } |
690 | |
691 | static inline int |
692 | __gthread_equal (__gthread_t __t1, __gthread_t __t2) |
693 | { |
694 | return __gthrw_(pthread_equal) (__t1, __t2); |
695 | } |
696 | |
697 | static inline __gthread_t |
698 | __gthread_self (void) |
699 | { |
700 | return __gthrw_(pthread_self) (); |
701 | } |
702 | |
703 | static inline int |
704 | __gthread_yield (void) |
705 | { |
706 | return __gthrw_(sched_yield) (); |
707 | } |
708 | |
709 | static inline int |
710 | __gthread_once (__gthread_once_t *__once, void (*__func) (void)) |
711 | { |
712 | if (__gthread_active_p ()) |
713 | return __gthrw_(pthread_once) (__once, __func); |
714 | else |
715 | return -1; |
716 | } |
717 | |
718 | static inline int |
719 | __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *)) |
720 | { |
721 | return __gthrw_(pthread_key_create) (__key, __dtor); |
722 | } |
723 | |
724 | static inline int |
725 | __gthread_key_delete (__gthread_key_t __key) |
726 | { |
727 | return __gthrw_(pthread_key_delete) (__key); |
728 | } |
729 | |
730 | static inline void * |
731 | __gthread_getspecific (__gthread_key_t __key) |
732 | { |
733 | return __gthrw_(pthread_getspecific) (__key); |
734 | } |
735 | |
736 | static inline int |
737 | __gthread_setspecific (__gthread_key_t __key, const void *__ptr) |
738 | { |
739 | return __gthrw_(pthread_setspecific) (__key, __ptr); |
740 | } |
741 | |
742 | static inline void |
743 | __gthread_mutex_init_function (__gthread_mutex_t *__mutex) |
744 | { |
745 | if (__gthread_active_p ()) |
746 | __gthrw_(pthread_mutex_init) (__mutex, NULL); |
747 | } |
748 | |
749 | static inline int |
750 | __gthread_mutex_destroy (__gthread_mutex_t *__mutex) |
751 | { |
752 | if (__gthread_active_p ()) |
753 | return __gthrw_(pthread_mutex_destroy) (__mutex); |
754 | else |
755 | return 0; |
756 | } |
757 | |
758 | static inline int |
759 | __gthread_mutex_lock (__gthread_mutex_t *__mutex) |
760 | { |
761 | if (__gthread_active_p ()) |
762 | return __gthrw_(pthread_mutex_lock) (__mutex); |
763 | else |
764 | return 0; |
765 | } |
766 | |
767 | static inline int |
768 | __gthread_mutex_trylock (__gthread_mutex_t *__mutex) |
769 | { |
770 | if (__gthread_active_p ()) |
771 | return __gthrw_(pthread_mutex_trylock) (__mutex); |
772 | else |
773 | return 0; |
774 | } |
775 | |
776 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
777 | static inline int |
778 | __gthread_mutex_timedlock (__gthread_mutex_t *__mutex, |
779 | const __gthread_time_t *__abs_timeout) |
780 | { |
781 | if (__gthread_active_p ()) |
782 | return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout); |
783 | else |
784 | return 0; |
785 | } |
786 | #endif |
787 | |
788 | static inline int |
789 | __gthread_mutex_unlock (__gthread_mutex_t *__mutex) |
790 | { |
791 | if (__gthread_active_p ()) |
792 | return __gthrw_(pthread_mutex_unlock) (__mutex); |
793 | else |
794 | return 0; |
795 | } |
796 | |
797 | #if !defined( PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) \ |
798 | || defined(_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC) |
799 | static inline int |
800 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) |
801 | { |
802 | if (__gthread_active_p ()) |
803 | { |
804 | pthread_mutexattr_t __attr; |
805 | int __r; |
806 | |
807 | __r = __gthrw_(pthread_mutexattr_init) (&__attr); |
808 | if (!__r) |
809 | __r = __gthrw_(pthread_mutexattr_settype) (&__attr, |
810 | PTHREAD_MUTEX_RECURSIVE); |
811 | if (!__r) |
812 | __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr); |
813 | if (!__r) |
814 | __r = __gthrw_(pthread_mutexattr_destroy) (&__attr); |
815 | return __r; |
816 | } |
817 | return 0; |
818 | } |
819 | #endif |
820 | |
821 | static inline int |
822 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) |
823 | { |
824 | return __gthread_mutex_lock (__mutex); |
825 | } |
826 | |
827 | static inline int |
828 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) |
829 | { |
830 | return __gthread_mutex_trylock (__mutex); |
831 | } |
832 | |
833 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
834 | static inline int |
835 | __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex, |
836 | const __gthread_time_t *__abs_timeout) |
837 | { |
838 | return __gthread_mutex_timedlock (__mutex, __abs_timeout); |
839 | } |
840 | #endif |
841 | |
842 | static inline int |
843 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) |
844 | { |
845 | return __gthread_mutex_unlock (__mutex); |
846 | } |
847 | |
848 | static inline int |
849 | __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) |
850 | { |
851 | return __gthread_mutex_destroy (__mutex); |
852 | } |
853 | |
854 | #ifdef _GTHREAD_USE_COND_INIT_FUNC |
855 | static inline void |
856 | __gthread_cond_init_function (__gthread_cond_t *__cond) |
857 | { |
858 | if (__gthread_active_p ()) |
859 | __gthrw_(pthread_cond_init) (__cond, NULL); |
860 | } |
861 | #endif |
862 | |
863 | static inline int |
864 | __gthread_cond_broadcast (__gthread_cond_t *__cond) |
865 | { |
866 | return __gthrw_(pthread_cond_broadcast) (__cond); |
867 | } |
868 | |
869 | static inline int |
870 | __gthread_cond_signal (__gthread_cond_t *__cond) |
871 | { |
872 | return __gthrw_(pthread_cond_signal) (__cond); |
873 | } |
874 | |
875 | static inline int |
876 | __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex) |
877 | { |
878 | return __gthrw_(pthread_cond_wait) (__cond, __mutex); |
879 | } |
880 | |
881 | static inline int |
882 | __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex, |
883 | const __gthread_time_t *__abs_timeout) |
884 | { |
885 | return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout); |
886 | } |
887 | |
888 | static inline int |
889 | __gthread_cond_wait_recursive (__gthread_cond_t *__cond, |
890 | __gthread_recursive_mutex_t *__mutex) |
891 | { |
892 | return __gthread_cond_wait (__cond, __mutex); |
893 | } |
894 | |
895 | static inline int |
896 | __gthread_cond_destroy (__gthread_cond_t* __cond) |
897 | { |
898 | return __gthrw_(pthread_cond_destroy) (__cond); |
899 | } |
900 | |
901 | #ifndef __cplusplus |
902 | static inline int |
903 | __gthread_rwlock_rdlock (__gthread_rwlock_t *__rwlock) |
904 | { |
905 | if (__gthread_active_p ()) |
906 | return __gthrw_(pthread_rwlock_rdlock) (__rwlock); |
907 | else |
908 | return 0; |
909 | } |
910 | |
911 | static inline int |
912 | __gthread_rwlock_tryrdlock (__gthread_rwlock_t *__rwlock) |
913 | { |
914 | if (__gthread_active_p ()) |
915 | return __gthrw_(pthread_rwlock_tryrdlock) (__rwlock); |
916 | else |
917 | return 0; |
918 | } |
919 | |
920 | static inline int |
921 | __gthread_rwlock_wrlock (__gthread_rwlock_t *__rwlock) |
922 | { |
923 | if (__gthread_active_p ()) |
924 | return __gthrw_(pthread_rwlock_wrlock) (__rwlock); |
925 | else |
926 | return 0; |
927 | } |
928 | |
929 | static inline int |
930 | __gthread_rwlock_trywrlock (__gthread_rwlock_t *__rwlock) |
931 | { |
932 | if (__gthread_active_p ()) |
933 | return __gthrw_(pthread_rwlock_trywrlock) (__rwlock); |
934 | else |
935 | return 0; |
936 | } |
937 | |
938 | static inline int |
939 | __gthread_rwlock_unlock (__gthread_rwlock_t *__rwlock) |
940 | { |
941 | if (__gthread_active_p ()) |
942 | return __gthrw_(pthread_rwlock_unlock) (__rwlock); |
943 | else |
944 | return 0; |
945 | } |
946 | #endif |
947 | |
948 | #endif /* _LIBOBJC */ |
949 | |
950 | #endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */ |
951 | |