1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
2 | /* Compile this one with gcc. */ |
3 | /* Copyright (C) 1997-2017 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 | typedef pthread_mutex_t __gthread_recursive_mutex_t; |
52 | typedef pthread_cond_t __gthread_cond_t; |
53 | typedef struct timespec __gthread_time_t; |
54 | |
55 | /* POSIX like conditional variables are supported. Please look at comments |
56 | in gthr.h for details. */ |
57 | #define __GTHREAD_HAS_COND 1 |
58 | |
59 | #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
60 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
61 | #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT |
62 | #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER) |
63 | #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER |
64 | #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) |
65 | #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP |
66 | #else |
67 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
68 | #endif |
69 | #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER |
70 | #define __GTHREAD_TIME_INIT {0,0} |
71 | |
72 | #ifdef _GTHREAD_USE_MUTEX_INIT_FUNC |
73 | # undef __GTHREAD_MUTEX_INIT |
74 | #endif |
75 | #ifdef _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC |
76 | # undef __GTHREAD_RECURSIVE_MUTEX_INIT |
77 | # undef __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION |
78 | # define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function |
79 | #endif |
80 | #ifdef _GTHREAD_USE_COND_INIT_FUNC |
81 | # undef __GTHREAD_COND_INIT |
82 | # define __GTHREAD_COND_INIT_FUNCTION __gthread_cond_init_function |
83 | #endif |
84 | |
85 | #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK |
86 | # ifndef __gthrw_pragma |
87 | # define __gthrw_pragma(pragma) |
88 | # endif |
89 | # define __gthrw2(name,name2,type) \ |
90 | static __typeof(type) name __attribute__ ((__weakref__(#name2))); \ |
91 | __gthrw_pragma(weak type) |
92 | # define __gthrw_(name) __gthrw_ ## name |
93 | #else |
94 | # define __gthrw2(name,name2,type) |
95 | # define __gthrw_(name) name |
96 | #endif |
97 | |
98 | /* Typically, __gthrw_foo is a weak reference to symbol foo. */ |
99 | #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name) |
100 | |
101 | __gthrw(pthread_once) |
102 | __gthrw(pthread_getspecific) |
103 | __gthrw(pthread_setspecific) |
104 | |
105 | __gthrw(pthread_create) |
106 | __gthrw(pthread_join) |
107 | __gthrw(pthread_equal) |
108 | __gthrw(pthread_self) |
109 | __gthrw(pthread_detach) |
110 | #ifndef __BIONIC__ |
111 | __gthrw(pthread_cancel) |
112 | #endif |
113 | __gthrw(sched_yield) |
114 | |
115 | __gthrw(pthread_mutex_lock) |
116 | __gthrw(pthread_mutex_trylock) |
117 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
118 | __gthrw(pthread_mutex_timedlock) |
119 | #endif |
120 | __gthrw(pthread_mutex_unlock) |
121 | __gthrw(pthread_mutex_init) |
122 | __gthrw(pthread_mutex_destroy) |
123 | |
124 | __gthrw(pthread_cond_init) |
125 | __gthrw(pthread_cond_broadcast) |
126 | __gthrw(pthread_cond_signal) |
127 | __gthrw(pthread_cond_wait) |
128 | __gthrw(pthread_cond_timedwait) |
129 | __gthrw(pthread_cond_destroy) |
130 | |
131 | __gthrw(pthread_key_create) |
132 | __gthrw(pthread_key_delete) |
133 | __gthrw(pthread_mutexattr_init) |
134 | __gthrw(pthread_mutexattr_settype) |
135 | __gthrw(pthread_mutexattr_destroy) |
136 | |
137 | |
138 | #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK) |
139 | /* Objective-C. */ |
140 | __gthrw(pthread_exit) |
141 | #ifdef _POSIX_PRIORITY_SCHEDULING |
142 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
143 | __gthrw(sched_get_priority_max) |
144 | __gthrw(sched_get_priority_min) |
145 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
146 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
147 | __gthrw(pthread_attr_destroy) |
148 | __gthrw(pthread_attr_init) |
149 | __gthrw(pthread_attr_setdetachstate) |
150 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
151 | __gthrw(pthread_getschedparam) |
152 | __gthrw(pthread_setschedparam) |
153 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
154 | #endif /* _LIBOBJC || _LIBOBJC_WEAK */ |
155 | |
156 | #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK |
157 | |
158 | /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if |
159 | -pthreads is not specified. The functions are dummies and most return an |
160 | error value. However pthread_once returns 0 without invoking the routine |
161 | it is passed so we cannot pretend that the interface is active if -pthreads |
162 | is not specified. On Solaris 2.5.1, the interface is not exposed at all so |
163 | we need to play the usual game with weak symbols. On Solaris 10 and up, a |
164 | working interface is always exposed. On FreeBSD 6 and later, libc also |
165 | exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up |
166 | to 9 does. FreeBSD >= 700014 even provides a pthread_cancel stub in libc, |
167 | which means the alternate __gthread_active_p below cannot be used there. */ |
168 | |
169 | #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__)) |
170 | |
171 | static volatile int __gthread_active = -1; |
172 | |
173 | static void |
174 | __gthread_trigger (void) |
175 | { |
176 | __gthread_active = 1; |
177 | } |
178 | |
179 | static inline int |
180 | __gthread_active_p (void) |
181 | { |
182 | static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER; |
183 | static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT; |
184 | |
185 | /* Avoid reading __gthread_active twice on the main code path. */ |
186 | int __gthread_active_latest_value = __gthread_active; |
187 | |
188 | /* This test is not protected to avoid taking a lock on the main code |
189 | path so every update of __gthread_active in a threaded program must |
190 | be atomic with regard to the result of the test. */ |
191 | if (__builtin_expect (__gthread_active_latest_value < 0, 0)) |
192 | { |
193 | if (__gthrw_(pthread_once)) |
194 | { |
195 | /* If this really is a threaded program, then we must ensure that |
196 | __gthread_active has been set to 1 before exiting this block. */ |
197 | __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex); |
198 | __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger); |
199 | __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex); |
200 | } |
201 | |
202 | /* Make sure we'll never enter this block again. */ |
203 | if (__gthread_active < 0) |
204 | __gthread_active = 0; |
205 | |
206 | __gthread_active_latest_value = __gthread_active; |
207 | } |
208 | |
209 | return __gthread_active_latest_value != 0; |
210 | } |
211 | |
212 | #else /* neither FreeBSD nor Solaris */ |
213 | |
214 | /* For a program to be multi-threaded the only thing that it certainly must |
215 | be using is pthread_create. However, there may be other libraries that |
216 | intercept pthread_create with their own definitions to wrap pthreads |
217 | functionality for some purpose. In those cases, pthread_create being |
218 | defined might not necessarily mean that libpthread is actually linked |
219 | in. |
220 | |
221 | For the GNU C library, we can use a known internal name. This is always |
222 | available in the ABI, but no other library would define it. That is |
223 | ideal, since any public pthread function might be intercepted just as |
224 | pthread_create might be. __pthread_key_create is an "internal" |
225 | implementation symbol, but it is part of the public exported ABI. Also, |
226 | it's among the symbols that the static libpthread.a always links in |
227 | whenever pthread_create is used, so there is no danger of a false |
228 | negative result in any statically-linked, multi-threaded program. |
229 | |
230 | For others, we choose pthread_cancel as a function that seems unlikely |
231 | to be redefined by an interceptor library. The bionic (Android) C |
232 | library does not provide pthread_cancel, so we do use pthread_create |
233 | there (and interceptor libraries lose). */ |
234 | |
235 | #ifdef __GLIBC__ |
236 | __gthrw2(__gthrw_(__pthread_key_create), |
237 | __pthread_key_create, |
238 | pthread_key_create) |
239 | # define GTHR_ACTIVE_PROXY __gthrw_(__pthread_key_create) |
240 | #elif defined (__BIONIC__) |
241 | # define GTHR_ACTIVE_PROXY __gthrw_(pthread_create) |
242 | #else |
243 | # define GTHR_ACTIVE_PROXY __gthrw_(pthread_cancel) |
244 | #endif |
245 | |
246 | static inline int |
247 | __gthread_active_p (void) |
248 | { |
249 | static void *const __gthread_active_ptr |
250 | = __extension__ (void *) >HR_ACTIVE_PROXY; |
251 | return __gthread_active_ptr != 0; |
252 | } |
253 | |
254 | #endif /* FreeBSD or Solaris */ |
255 | |
256 | #else /* not __GXX_WEAK__ */ |
257 | |
258 | /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread |
259 | calls in shared flavors of the HP-UX C library. Most of the stubs |
260 | have no functionality. The details are described in the "libc cumulative |
261 | patch" for each subversion of HP-UX 11. There are two special interfaces |
262 | provided for checking whether an application is linked to a shared pthread |
263 | library or not. However, these interfaces aren't available in early |
264 | libpthread libraries. We also need a test that works for archive |
265 | libraries. We can't use pthread_once as some libc versions call the |
266 | init function. We also can't use pthread_create or pthread_attr_init |
267 | as these create a thread and thereby prevent changing the default stack |
268 | size. The function pthread_default_stacksize_np is available in both |
269 | the archive and shared versions of libpthread. It can be used to |
270 | determine the default pthread stack size. There is a stub in some |
271 | shared libc versions which returns a zero size if pthreads are not |
272 | active. We provide an equivalent stub to handle cases where libc |
273 | doesn't provide one. */ |
274 | |
275 | #if defined(__hppa__) && defined(__hpux__) |
276 | |
277 | static volatile int __gthread_active = -1; |
278 | |
279 | static inline int |
280 | __gthread_active_p (void) |
281 | { |
282 | /* Avoid reading __gthread_active twice on the main code path. */ |
283 | int __gthread_active_latest_value = __gthread_active; |
284 | size_t __s; |
285 | |
286 | if (__builtin_expect (__gthread_active_latest_value < 0, 0)) |
287 | { |
288 | pthread_default_stacksize_np (0, &__s); |
289 | __gthread_active = __s ? 1 : 0; |
290 | __gthread_active_latest_value = __gthread_active; |
291 | } |
292 | |
293 | return __gthread_active_latest_value != 0; |
294 | } |
295 | |
296 | #else /* not hppa-hpux */ |
297 | |
298 | static inline int |
299 | __gthread_active_p (void) |
300 | { |
301 | return 1; |
302 | } |
303 | |
304 | #endif /* hppa-hpux */ |
305 | |
306 | #endif /* __GXX_WEAK__ */ |
307 | |
308 | #ifdef _LIBOBJC |
309 | |
310 | /* This is the config.h file in libobjc/ */ |
311 | #include <config.h> |
312 | |
313 | #ifdef HAVE_SCHED_H |
314 | # include <sched.h> |
315 | #endif |
316 | |
317 | /* Key structure for maintaining thread specific storage */ |
318 | static pthread_key_t _objc_thread_storage; |
319 | static pthread_attr_t _objc_thread_attribs; |
320 | |
321 | /* Thread local storage for a single thread */ |
322 | static void *thread_local_storage = NULL; |
323 | |
324 | /* Backend initialization functions */ |
325 | |
326 | /* Initialize the threads subsystem. */ |
327 | static inline int |
328 | __gthread_objc_init_thread_system (void) |
329 | { |
330 | if (__gthread_active_p ()) |
331 | { |
332 | /* Initialize the thread storage key. */ |
333 | if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0) |
334 | { |
335 | /* The normal default detach state for threads is |
336 | * PTHREAD_CREATE_JOINABLE which causes threads to not die |
337 | * when you think they should. */ |
338 | if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0 |
339 | && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs, |
340 | PTHREAD_CREATE_DETACHED) == 0) |
341 | return 0; |
342 | } |
343 | } |
344 | |
345 | return -1; |
346 | } |
347 | |
348 | /* Close the threads subsystem. */ |
349 | static inline int |
350 | __gthread_objc_close_thread_system (void) |
351 | { |
352 | if (__gthread_active_p () |
353 | && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0 |
354 | && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0) |
355 | return 0; |
356 | |
357 | return -1; |
358 | } |
359 | |
360 | /* Backend thread functions */ |
361 | |
362 | /* Create a new thread of execution. */ |
363 | static inline objc_thread_t |
364 | __gthread_objc_thread_detach (void (*func)(void *), void *arg) |
365 | { |
366 | objc_thread_t thread_id; |
367 | pthread_t new_thread_handle; |
368 | |
369 | if (!__gthread_active_p ()) |
370 | return NULL; |
371 | |
372 | if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs, |
373 | (void *) func, arg))) |
374 | thread_id = (objc_thread_t) new_thread_handle; |
375 | else |
376 | thread_id = NULL; |
377 | |
378 | return thread_id; |
379 | } |
380 | |
381 | /* Set the current thread's priority. */ |
382 | static inline int |
383 | __gthread_objc_thread_set_priority (int priority) |
384 | { |
385 | if (!__gthread_active_p ()) |
386 | return -1; |
387 | else |
388 | { |
389 | #ifdef _POSIX_PRIORITY_SCHEDULING |
390 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
391 | pthread_t thread_id = __gthrw_(pthread_self) (); |
392 | int policy; |
393 | struct sched_param params; |
394 | int priority_min, priority_max; |
395 | |
396 | if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0) |
397 | { |
398 | if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1) |
399 | return -1; |
400 | |
401 | if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1) |
402 | return -1; |
403 | |
404 | if (priority > priority_max) |
405 | priority = priority_max; |
406 | else if (priority < priority_min) |
407 | priority = priority_min; |
408 | params.sched_priority = priority; |
409 | |
410 | /* |
411 | * The solaris 7 and several other man pages incorrectly state that |
412 | * this should be a pointer to policy but pthread.h is universally |
413 | * at odds with this. |
414 | */ |
415 | if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0) |
416 | return 0; |
417 | } |
418 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
419 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
420 | return -1; |
421 | } |
422 | } |
423 | |
424 | /* Return the current thread's priority. */ |
425 | static inline int |
426 | __gthread_objc_thread_get_priority (void) |
427 | { |
428 | #ifdef _POSIX_PRIORITY_SCHEDULING |
429 | #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING |
430 | if (__gthread_active_p ()) |
431 | { |
432 | int policy; |
433 | struct sched_param params; |
434 | |
435 | if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0) |
436 | return params.sched_priority; |
437 | else |
438 | return -1; |
439 | } |
440 | else |
441 | #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ |
442 | #endif /* _POSIX_PRIORITY_SCHEDULING */ |
443 | return OBJC_THREAD_INTERACTIVE_PRIORITY; |
444 | } |
445 | |
446 | /* Yield our process time to another thread. */ |
447 | static inline void |
448 | __gthread_objc_thread_yield (void) |
449 | { |
450 | if (__gthread_active_p ()) |
451 | __gthrw_(sched_yield) (); |
452 | } |
453 | |
454 | /* Terminate the current thread. */ |
455 | static inline int |
456 | __gthread_objc_thread_exit (void) |
457 | { |
458 | if (__gthread_active_p ()) |
459 | /* exit the thread */ |
460 | __gthrw_(pthread_exit) (&__objc_thread_exit_status); |
461 | |
462 | /* Failed if we reached here */ |
463 | return -1; |
464 | } |
465 | |
466 | /* Returns an integer value which uniquely describes a thread. */ |
467 | static inline objc_thread_t |
468 | __gthread_objc_thread_id (void) |
469 | { |
470 | if (__gthread_active_p ()) |
471 | return (objc_thread_t) __gthrw_(pthread_self) (); |
472 | else |
473 | return (objc_thread_t) 1; |
474 | } |
475 | |
476 | /* Sets the thread's local storage pointer. */ |
477 | static inline int |
478 | __gthread_objc_thread_set_data (void *value) |
479 | { |
480 | if (__gthread_active_p ()) |
481 | return __gthrw_(pthread_setspecific) (_objc_thread_storage, value); |
482 | else |
483 | { |
484 | thread_local_storage = value; |
485 | return 0; |
486 | } |
487 | } |
488 | |
489 | /* Returns the thread's local storage pointer. */ |
490 | static inline void * |
491 | __gthread_objc_thread_get_data (void) |
492 | { |
493 | if (__gthread_active_p ()) |
494 | return __gthrw_(pthread_getspecific) (_objc_thread_storage); |
495 | else |
496 | return thread_local_storage; |
497 | } |
498 | |
499 | /* Backend mutex functions */ |
500 | |
501 | /* Allocate a mutex. */ |
502 | static inline int |
503 | __gthread_objc_mutex_allocate (objc_mutex_t mutex) |
504 | { |
505 | if (__gthread_active_p ()) |
506 | { |
507 | mutex->backend = objc_malloc (sizeof (pthread_mutex_t)); |
508 | |
509 | if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL)) |
510 | { |
511 | objc_free (mutex->backend); |
512 | mutex->backend = NULL; |
513 | return -1; |
514 | } |
515 | } |
516 | |
517 | return 0; |
518 | } |
519 | |
520 | /* Deallocate a mutex. */ |
521 | static inline int |
522 | __gthread_objc_mutex_deallocate (objc_mutex_t mutex) |
523 | { |
524 | if (__gthread_active_p ()) |
525 | { |
526 | int count; |
527 | |
528 | /* |
529 | * Posix Threads specifically require that the thread be unlocked |
530 | * for __gthrw_(pthread_mutex_destroy) to work. |
531 | */ |
532 | |
533 | do |
534 | { |
535 | count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend); |
536 | if (count < 0) |
537 | return -1; |
538 | } |
539 | while (count); |
540 | |
541 | if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend)) |
542 | return -1; |
543 | |
544 | objc_free (mutex->backend); |
545 | mutex->backend = NULL; |
546 | } |
547 | return 0; |
548 | } |
549 | |
550 | /* Grab a lock on a mutex. */ |
551 | static inline int |
552 | __gthread_objc_mutex_lock (objc_mutex_t mutex) |
553 | { |
554 | if (__gthread_active_p () |
555 | && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0) |
556 | { |
557 | return -1; |
558 | } |
559 | |
560 | return 0; |
561 | } |
562 | |
563 | /* Try to grab a lock on a mutex. */ |
564 | static inline int |
565 | __gthread_objc_mutex_trylock (objc_mutex_t mutex) |
566 | { |
567 | if (__gthread_active_p () |
568 | && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0) |
569 | { |
570 | return -1; |
571 | } |
572 | |
573 | return 0; |
574 | } |
575 | |
576 | /* Unlock the mutex */ |
577 | static inline int |
578 | __gthread_objc_mutex_unlock (objc_mutex_t mutex) |
579 | { |
580 | if (__gthread_active_p () |
581 | && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0) |
582 | { |
583 | return -1; |
584 | } |
585 | |
586 | return 0; |
587 | } |
588 | |
589 | /* Backend condition mutex functions */ |
590 | |
591 | /* Allocate a condition. */ |
592 | static inline int |
593 | __gthread_objc_condition_allocate (objc_condition_t condition) |
594 | { |
595 | if (__gthread_active_p ()) |
596 | { |
597 | condition->backend = objc_malloc (sizeof (pthread_cond_t)); |
598 | |
599 | if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL)) |
600 | { |
601 | objc_free (condition->backend); |
602 | condition->backend = NULL; |
603 | return -1; |
604 | } |
605 | } |
606 | |
607 | return 0; |
608 | } |
609 | |
610 | /* Deallocate a condition. */ |
611 | static inline int |
612 | __gthread_objc_condition_deallocate (objc_condition_t condition) |
613 | { |
614 | if (__gthread_active_p ()) |
615 | { |
616 | if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend)) |
617 | return -1; |
618 | |
619 | objc_free (condition->backend); |
620 | condition->backend = NULL; |
621 | } |
622 | return 0; |
623 | } |
624 | |
625 | /* Wait on the condition */ |
626 | static inline int |
627 | __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) |
628 | { |
629 | if (__gthread_active_p ()) |
630 | return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend, |
631 | (pthread_mutex_t *) mutex->backend); |
632 | else |
633 | return 0; |
634 | } |
635 | |
636 | /* Wake up all threads waiting on this condition. */ |
637 | static inline int |
638 | __gthread_objc_condition_broadcast (objc_condition_t condition) |
639 | { |
640 | if (__gthread_active_p ()) |
641 | return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend); |
642 | else |
643 | return 0; |
644 | } |
645 | |
646 | /* Wake up one thread waiting on this condition. */ |
647 | static inline int |
648 | __gthread_objc_condition_signal (objc_condition_t condition) |
649 | { |
650 | if (__gthread_active_p ()) |
651 | return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend); |
652 | else |
653 | return 0; |
654 | } |
655 | |
656 | #else /* _LIBOBJC */ |
657 | |
658 | static inline int |
659 | __gthread_create (__gthread_t *__threadid, void *(*__func) (void*), |
660 | void *__args) |
661 | { |
662 | return __gthrw_(pthread_create) (__threadid, NULL, __func, __args); |
663 | } |
664 | |
665 | static inline int |
666 | __gthread_join (__gthread_t __threadid, void **__value_ptr) |
667 | { |
668 | return __gthrw_(pthread_join) (__threadid, __value_ptr); |
669 | } |
670 | |
671 | static inline int |
672 | __gthread_detach (__gthread_t __threadid) |
673 | { |
674 | return __gthrw_(pthread_detach) (__threadid); |
675 | } |
676 | |
677 | static inline int |
678 | __gthread_equal (__gthread_t __t1, __gthread_t __t2) |
679 | { |
680 | return __gthrw_(pthread_equal) (__t1, __t2); |
681 | } |
682 | |
683 | static inline __gthread_t |
684 | __gthread_self (void) |
685 | { |
686 | return __gthrw_(pthread_self) (); |
687 | } |
688 | |
689 | static inline int |
690 | __gthread_yield (void) |
691 | { |
692 | return __gthrw_(sched_yield) (); |
693 | } |
694 | |
695 | static inline int |
696 | __gthread_once (__gthread_once_t *__once, void (*__func) (void)) |
697 | { |
698 | if (__gthread_active_p ()) |
699 | return __gthrw_(pthread_once) (__once, __func); |
700 | else |
701 | return -1; |
702 | } |
703 | |
704 | static inline int |
705 | __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *)) |
706 | { |
707 | return __gthrw_(pthread_key_create) (__key, __dtor); |
708 | } |
709 | |
710 | static inline int |
711 | __gthread_key_delete (__gthread_key_t __key) |
712 | { |
713 | return __gthrw_(pthread_key_delete) (__key); |
714 | } |
715 | |
716 | static inline void * |
717 | __gthread_getspecific (__gthread_key_t __key) |
718 | { |
719 | return __gthrw_(pthread_getspecific) (__key); |
720 | } |
721 | |
722 | static inline int |
723 | __gthread_setspecific (__gthread_key_t __key, const void *__ptr) |
724 | { |
725 | return __gthrw_(pthread_setspecific) (__key, __ptr); |
726 | } |
727 | |
728 | static inline void |
729 | __gthread_mutex_init_function (__gthread_mutex_t *__mutex) |
730 | { |
731 | if (__gthread_active_p ()) |
732 | __gthrw_(pthread_mutex_init) (__mutex, NULL); |
733 | } |
734 | |
735 | static inline int |
736 | __gthread_mutex_destroy (__gthread_mutex_t *__mutex) |
737 | { |
738 | if (__gthread_active_p ()) |
739 | return __gthrw_(pthread_mutex_destroy) (__mutex); |
740 | else |
741 | return 0; |
742 | } |
743 | |
744 | static inline int |
745 | __gthread_mutex_lock (__gthread_mutex_t *__mutex) |
746 | { |
747 | if (__gthread_active_p ()) |
748 | return __gthrw_(pthread_mutex_lock) (__mutex); |
749 | else |
750 | return 0; |
751 | } |
752 | |
753 | static inline int |
754 | __gthread_mutex_trylock (__gthread_mutex_t *__mutex) |
755 | { |
756 | if (__gthread_active_p ()) |
757 | return __gthrw_(pthread_mutex_trylock) (__mutex); |
758 | else |
759 | return 0; |
760 | } |
761 | |
762 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
763 | static inline int |
764 | __gthread_mutex_timedlock (__gthread_mutex_t *__mutex, |
765 | const __gthread_time_t *__abs_timeout) |
766 | { |
767 | if (__gthread_active_p ()) |
768 | return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout); |
769 | else |
770 | return 0; |
771 | } |
772 | #endif |
773 | |
774 | static inline int |
775 | __gthread_mutex_unlock (__gthread_mutex_t *__mutex) |
776 | { |
777 | if (__gthread_active_p ()) |
778 | return __gthrw_(pthread_mutex_unlock) (__mutex); |
779 | else |
780 | return 0; |
781 | } |
782 | |
783 | #if !defined( PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) \ |
784 | || defined(_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC) |
785 | static inline int |
786 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) |
787 | { |
788 | if (__gthread_active_p ()) |
789 | { |
790 | pthread_mutexattr_t __attr; |
791 | int __r; |
792 | |
793 | __r = __gthrw_(pthread_mutexattr_init) (&__attr); |
794 | if (!__r) |
795 | __r = __gthrw_(pthread_mutexattr_settype) (&__attr, |
796 | PTHREAD_MUTEX_RECURSIVE); |
797 | if (!__r) |
798 | __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr); |
799 | if (!__r) |
800 | __r = __gthrw_(pthread_mutexattr_destroy) (&__attr); |
801 | return __r; |
802 | } |
803 | return 0; |
804 | } |
805 | #endif |
806 | |
807 | static inline int |
808 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) |
809 | { |
810 | return __gthread_mutex_lock (__mutex); |
811 | } |
812 | |
813 | static inline int |
814 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) |
815 | { |
816 | return __gthread_mutex_trylock (__mutex); |
817 | } |
818 | |
819 | #if _GTHREAD_USE_MUTEX_TIMEDLOCK |
820 | static inline int |
821 | __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex, |
822 | const __gthread_time_t *__abs_timeout) |
823 | { |
824 | return __gthread_mutex_timedlock (__mutex, __abs_timeout); |
825 | } |
826 | #endif |
827 | |
828 | static inline int |
829 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) |
830 | { |
831 | return __gthread_mutex_unlock (__mutex); |
832 | } |
833 | |
834 | static inline int |
835 | __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) |
836 | { |
837 | return __gthread_mutex_destroy (__mutex); |
838 | } |
839 | |
840 | #ifdef _GTHREAD_USE_COND_INIT_FUNC |
841 | static inline void |
842 | __gthread_cond_init_function (__gthread_cond_t *__cond) |
843 | { |
844 | if (__gthread_active_p ()) |
845 | __gthrw_(pthread_cond_init) (__cond, NULL); |
846 | } |
847 | #endif |
848 | |
849 | static inline int |
850 | __gthread_cond_broadcast (__gthread_cond_t *__cond) |
851 | { |
852 | return __gthrw_(pthread_cond_broadcast) (__cond); |
853 | } |
854 | |
855 | static inline int |
856 | __gthread_cond_signal (__gthread_cond_t *__cond) |
857 | { |
858 | return __gthrw_(pthread_cond_signal) (__cond); |
859 | } |
860 | |
861 | static inline int |
862 | __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex) |
863 | { |
864 | return __gthrw_(pthread_cond_wait) (__cond, __mutex); |
865 | } |
866 | |
867 | static inline int |
868 | __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex, |
869 | const __gthread_time_t *__abs_timeout) |
870 | { |
871 | return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout); |
872 | } |
873 | |
874 | static inline int |
875 | __gthread_cond_wait_recursive (__gthread_cond_t *__cond, |
876 | __gthread_recursive_mutex_t *__mutex) |
877 | { |
878 | return __gthread_cond_wait (__cond, __mutex); |
879 | } |
880 | |
881 | static inline int |
882 | __gthread_cond_destroy (__gthread_cond_t* __cond) |
883 | { |
884 | return __gthrw_(pthread_cond_destroy) (__cond); |
885 | } |
886 | |
887 | #endif /* _LIBOBJC */ |
888 | |
889 | #endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */ |
890 | |