1/* Threads compatibility routines for libgcc2 and libobjc. */ 
2/* Compile this one with gcc. */ 
3/* Copyright (C) 1997-2019 Free Software Foundation, Inc. 
4 
5This file is part of GCC. 
6 
7GCC is free software; you can redistribute it and/or modify it under 
8the terms of the GNU General Public License as published by the Free 
9Software Foundation; either version 3, or (at your option) any later 
10version. 
11 
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 
13WARRANTY; without even the implied warranty of MERCHANTABILITY or 
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
15for more details. 
16 
17Under Section 7 of GPL version 3, you are granted additional 
18permissions described in the GCC Runtime Library Exception, version 
193.1, as published by the Free Software Foundation. 
20 
21You should have received a copy of the GNU General Public License and 
22a copy of the GCC Runtime Library Exception along with this program; 
23see 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 
47typedef pthread_t __gthread_t; 
48typedef pthread_key_t __gthread_key_t; 
49typedef pthread_once_t __gthread_once_t; 
50typedef pthread_mutex_t __gthread_mutex_t; 
51typedef pthread_mutex_t __gthread_recursive_mutex_t; 
52typedef pthread_cond_t __gthread_cond_t; 
53typedef 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 \ 
91 __attribute__ ((__weakref__(#name2), __copy__ (type))); \ 
92 __gthrw_pragma(weak type) 
93# define __gthrw_(name) __gthrw_ ## name 
94#else 
95# define __gthrw2(name,name2,type) 
96# define __gthrw_(name) name 
97#endif 
98 
99/* Typically, __gthrw_foo is a weak reference to symbol foo. */ 
100#define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name) 
101 
102__gthrw(pthread_once) 
103__gthrw(pthread_getspecific) 
104__gthrw(pthread_setspecific) 
105 
106__gthrw(pthread_create) 
107__gthrw(pthread_join) 
108__gthrw(pthread_equal) 
109__gthrw(pthread_self) 
110__gthrw(pthread_detach) 
111#ifndef __BIONIC__ 
112__gthrw(pthread_cancel) 
113#endif 
114__gthrw(sched_yield) 
115 
116__gthrw(pthread_mutex_lock) 
117__gthrw(pthread_mutex_trylock) 
118#if _GTHREAD_USE_MUTEX_TIMEDLOCK 
119__gthrw(pthread_mutex_timedlock) 
120#endif 
121__gthrw(pthread_mutex_unlock) 
122__gthrw(pthread_mutex_init) 
123__gthrw(pthread_mutex_destroy) 
124 
125__gthrw(pthread_cond_init) 
126__gthrw(pthread_cond_broadcast) 
127__gthrw(pthread_cond_signal) 
128__gthrw(pthread_cond_wait) 
129__gthrw(pthread_cond_timedwait) 
130__gthrw(pthread_cond_destroy) 
131 
132__gthrw(pthread_key_create) 
133__gthrw(pthread_key_delete) 
134__gthrw(pthread_mutexattr_init) 
135__gthrw(pthread_mutexattr_settype) 
136__gthrw(pthread_mutexattr_destroy) 
137 
138 
139#if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK) 
140/* Objective-C. */ 
141__gthrw(pthread_exit) 
142#ifdef _POSIX_PRIORITY_SCHEDULING 
143#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING 
144__gthrw(sched_get_priority_max) 
145__gthrw(sched_get_priority_min) 
146#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ 
147#endif /* _POSIX_PRIORITY_SCHEDULING */ 
148__gthrw(pthread_attr_destroy) 
149__gthrw(pthread_attr_init) 
150__gthrw(pthread_attr_setdetachstate) 
151#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING 
152__gthrw(pthread_getschedparam) 
153__gthrw(pthread_setschedparam) 
154#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ 
155#endif /* _LIBOBJC || _LIBOBJC_WEAK */ 
156 
157#if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK 
158 
159/* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if 
160 -pthreads is not specified. The functions are dummies and most return an 
161 error value. However pthread_once returns 0 without invoking the routine 
162 it is passed so we cannot pretend that the interface is active if -pthreads 
163 is not specified. On Solaris 2.5.1, the interface is not exposed at all so 
164 we need to play the usual game with weak symbols. On Solaris 10 and up, a 
165 working interface is always exposed. On FreeBSD 6 and later, libc also 
166 exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up 
167 to 9 does. FreeBSD >= 700014 even provides a pthread_cancel stub in libc, 
168 which means the alternate __gthread_active_p below cannot be used there. */ 
169 
170#if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__)) 
171 
172static volatile int __gthread_active = -1; 
173 
174static void 
175__gthread_trigger (void) 
176{ 
177 __gthread_active = 1; 
178} 
179 
180static inline int 
181__gthread_active_p (void) 
182{ 
183 static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER; 
184 static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT; 
185 
186 /* Avoid reading __gthread_active twice on the main code path. */ 
187 int __gthread_active_latest_value = __gthread_active; 
188 
189 /* This test is not protected to avoid taking a lock on the main code 
190 path so every update of __gthread_active in a threaded program must 
191 be atomic with regard to the result of the test. */ 
192 if (__builtin_expect (__gthread_active_latest_value < 0, 0)) 
193 { 
194 if (__gthrw_(pthread_once)) 
195 { 
196 /* If this really is a threaded program, then we must ensure that 
197 __gthread_active has been set to 1 before exiting this block. */ 
198 __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex); 
199 __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger); 
200 __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex); 
201 } 
202 
203 /* Make sure we'll never enter this block again. */ 
204 if (__gthread_active < 0) 
205 __gthread_active = 0; 
206 
207 __gthread_active_latest_value = __gthread_active; 
208 } 
209 
210 return __gthread_active_latest_value != 0; 
211} 
212 
213#else /* neither FreeBSD nor Solaris */ 
214 
215/* For a program to be multi-threaded the only thing that it certainly must 
216 be using is pthread_create. However, there may be other libraries that 
217 intercept pthread_create with their own definitions to wrap pthreads 
218 functionality for some purpose. In those cases, pthread_create being 
219 defined might not necessarily mean that libpthread is actually linked 
220 in. 
221 
222 For the GNU C library, we can use a known internal name. This is always 
223 available in the ABI, but no other library would define it. That is 
224 ideal, since any public pthread function might be intercepted just as 
225 pthread_create might be. __pthread_key_create is an "internal" 
226 implementation symbol, but it is part of the public exported ABI. Also, 
227 it's among the symbols that the static libpthread.a always links in 
228 whenever pthread_create is used, so there is no danger of a false 
229 negative result in any statically-linked, multi-threaded program. 
230 
231 For others, we choose pthread_cancel as a function that seems unlikely 
232 to be redefined by an interceptor library. The bionic (Android) C 
233 library does not provide pthread_cancel, so we do use pthread_create 
234 there (and interceptor libraries lose). */ 
235 
236#ifdef __GLIBC__ 
237__gthrw2(__gthrw_(__pthread_key_create), 
238 __pthread_key_create, 
239 pthread_key_create) 
240# define GTHR_ACTIVE_PROXY __gthrw_(__pthread_key_create) 
241#elif defined (__BIONIC__) 
242# define GTHR_ACTIVE_PROXY __gthrw_(pthread_create) 
243#else 
244# define GTHR_ACTIVE_PROXY __gthrw_(pthread_cancel) 
245#endif 
246 
247static inline int 
248__gthread_active_p (void) 
249{ 
250 static void *const __gthread_active_ptr 
251 = __extension__ (void *) &GTHR_ACTIVE_PROXY; 
252 return __gthread_active_ptr != 0; 
253} 
254 
255#endif /* FreeBSD or Solaris */ 
256 
257#else /* not __GXX_WEAK__ */ 
258 
259/* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread 
260 calls in shared flavors of the HP-UX C library. Most of the stubs 
261 have no functionality. The details are described in the "libc cumulative 
262 patch" for each subversion of HP-UX 11. There are two special interfaces 
263 provided for checking whether an application is linked to a shared pthread 
264 library or not. However, these interfaces aren't available in early 
265 libpthread libraries. We also need a test that works for archive 
266 libraries. We can't use pthread_once as some libc versions call the 
267 init function. We also can't use pthread_create or pthread_attr_init 
268 as these create a thread and thereby prevent changing the default stack 
269 size. The function pthread_default_stacksize_np is available in both 
270 the archive and shared versions of libpthread. It can be used to 
271 determine the default pthread stack size. There is a stub in some 
272 shared libc versions which returns a zero size if pthreads are not 
273 active. We provide an equivalent stub to handle cases where libc 
274 doesn't provide one. */ 
275 
276#if defined(__hppa__) && defined(__hpux__) 
277 
278static volatile int __gthread_active = -1; 
279 
280static inline int 
281__gthread_active_p (void) 
282{ 
283 /* Avoid reading __gthread_active twice on the main code path. */ 
284 int __gthread_active_latest_value = __gthread_active; 
285 size_t __s; 
286 
287 if (__builtin_expect (__gthread_active_latest_value < 0, 0)) 
288 { 
289 pthread_default_stacksize_np (0, &__s); 
290 __gthread_active = __s ? 1 : 0; 
291 __gthread_active_latest_value = __gthread_active; 
292 } 
293 
294 return __gthread_active_latest_value != 0; 
295} 
296 
297#else /* not hppa-hpux */ 
298 
299static inline int 
300__gthread_active_p (void) 
301{ 
302 return 1; 
303} 
304 
305#endif /* hppa-hpux */ 
306 
307#endif /* __GXX_WEAK__ */ 
308 
309#ifdef _LIBOBJC 
310 
311/* This is the config.h file in libobjc/ */ 
312#include <config.h> 
313 
314#ifdef HAVE_SCHED_H 
315# include <sched.h> 
316#endif 
317 
318/* Key structure for maintaining thread specific storage */ 
319static pthread_key_t _objc_thread_storage; 
320static pthread_attr_t _objc_thread_attribs; 
321 
322/* Thread local storage for a single thread */ 
323static void *thread_local_storage = NULL; 
324 
325/* Backend initialization functions */ 
326 
327/* Initialize the threads subsystem. */ 
328static inline int 
329__gthread_objc_init_thread_system (void) 
330{ 
331 if (__gthread_active_p ()) 
332 { 
333 /* Initialize the thread storage key. */ 
334 if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0) 
335 { 
336 /* The normal default detach state for threads is 
337 * PTHREAD_CREATE_JOINABLE which causes threads to not die 
338 * when you think they should. */ 
339 if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0 
340 && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs, 
341 PTHREAD_CREATE_DETACHED) == 0) 
342 return 0; 
343 } 
344 } 
345 
346 return -1; 
347} 
348 
349/* Close the threads subsystem. */ 
350static inline int 
351__gthread_objc_close_thread_system (void) 
352{ 
353 if (__gthread_active_p () 
354 && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0 
355 && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0) 
356 return 0; 
357 
358 return -1; 
359} 
360 
361/* Backend thread functions */ 
362 
363/* Create a new thread of execution. */ 
364static inline objc_thread_t 
365__gthread_objc_thread_detach (void (*func)(void *), void *arg) 
366{ 
367 objc_thread_t thread_id; 
368 pthread_t new_thread_handle; 
369 
370 if (!__gthread_active_p ()) 
371 return NULL; 
372 
373 if (!(__gthrw_(pthread_create) (&new_thread_handle, &_objc_thread_attribs, 
374 (void *) func, arg))) 
375 thread_id = (objc_thread_t) new_thread_handle; 
376 else 
377 thread_id = NULL; 
378 
379 return thread_id; 
380} 
381 
382/* Set the current thread's priority. */ 
383static inline int 
384__gthread_objc_thread_set_priority (int priority) 
385{ 
386 if (!__gthread_active_p ()) 
387 return -1; 
388 else 
389 { 
390#ifdef _POSIX_PRIORITY_SCHEDULING 
391#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING 
392 pthread_t thread_id = __gthrw_(pthread_self) (); 
393 int policy; 
394 struct sched_param params; 
395 int priority_min, priority_max; 
396 
397 if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0) 
398 { 
399 if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1) 
400 return -1; 
401 
402 if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1) 
403 return -1; 
404 
405 if (priority > priority_max) 
406 priority = priority_max; 
407 else if (priority < priority_min) 
408 priority = priority_min; 
409 params.sched_priority = priority; 
410 
411 /* 
412 * The solaris 7 and several other man pages incorrectly state that 
413 * this should be a pointer to policy but pthread.h is universally 
414 * at odds with this. 
415 */ 
416 if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0) 
417 return 0; 
418 } 
419#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ 
420#endif /* _POSIX_PRIORITY_SCHEDULING */ 
421 return -1; 
422 } 
423} 
424 
425/* Return the current thread's priority. */ 
426static inline int 
427__gthread_objc_thread_get_priority (void) 
428{ 
429#ifdef _POSIX_PRIORITY_SCHEDULING 
430#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING 
431 if (__gthread_active_p ()) 
432 { 
433 int policy; 
434 struct sched_param params; 
435 
436 if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0) 
437 return params.sched_priority; 
438 else 
439 return -1; 
440 } 
441 else 
442#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ 
443#endif /* _POSIX_PRIORITY_SCHEDULING */ 
444 return OBJC_THREAD_INTERACTIVE_PRIORITY; 
445} 
446 
447/* Yield our process time to another thread. */ 
448static inline void 
449__gthread_objc_thread_yield (void) 
450{ 
451 if (__gthread_active_p ()) 
452 __gthrw_(sched_yield) (); 
453} 
454 
455/* Terminate the current thread. */ 
456static inline int 
457__gthread_objc_thread_exit (void) 
458{ 
459 if (__gthread_active_p ()) 
460 /* exit the thread */ 
461 __gthrw_(pthread_exit) (&__objc_thread_exit_status); 
462 
463 /* Failed if we reached here */ 
464 return -1; 
465} 
466 
467/* Returns an integer value which uniquely describes a thread. */ 
468static inline objc_thread_t 
469__gthread_objc_thread_id (void) 
470{ 
471 if (__gthread_active_p ()) 
472 return (objc_thread_t) __gthrw_(pthread_self) (); 
473 else 
474 return (objc_thread_t) 1; 
475} 
476 
477/* Sets the thread's local storage pointer. */ 
478static inline int 
479__gthread_objc_thread_set_data (void *value) 
480{ 
481 if (__gthread_active_p ()) 
482 return __gthrw_(pthread_setspecific) (_objc_thread_storage, value); 
483 else 
484 { 
485 thread_local_storage = value; 
486 return 0; 
487 } 
488} 
489 
490/* Returns the thread's local storage pointer. */ 
491static inline void * 
492__gthread_objc_thread_get_data (void) 
493{ 
494 if (__gthread_active_p ()) 
495 return __gthrw_(pthread_getspecific) (_objc_thread_storage); 
496 else 
497 return thread_local_storage; 
498} 
499 
500/* Backend mutex functions */ 
501 
502/* Allocate a mutex. */ 
503static inline int 
504__gthread_objc_mutex_allocate (objc_mutex_t mutex) 
505{ 
506 if (__gthread_active_p ()) 
507 { 
508 mutex->backend = objc_malloc (sizeof (pthread_mutex_t)); 
509 
510 if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL)) 
511 { 
512 objc_free (mutex->backend); 
513 mutex->backend = NULL; 
514 return -1; 
515 } 
516 } 
517 
518 return 0; 
519} 
520 
521/* Deallocate a mutex. */ 
522static inline int 
523__gthread_objc_mutex_deallocate (objc_mutex_t mutex) 
524{ 
525 if (__gthread_active_p ()) 
526 { 
527 int count; 
528 
529 /* 
530 * Posix Threads specifically require that the thread be unlocked 
531 * for __gthrw_(pthread_mutex_destroy) to work. 
532 */ 
533 
534 do 
535 { 
536 count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend); 
537 if (count < 0) 
538 return -1; 
539 } 
540 while (count); 
541 
542 if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend)) 
543 return -1; 
544 
545 objc_free (mutex->backend); 
546 mutex->backend = NULL; 
547 } 
548 return 0; 
549} 
550 
551/* Grab a lock on a mutex. */ 
552static inline int 
553__gthread_objc_mutex_lock (objc_mutex_t mutex) 
554{ 
555 if (__gthread_active_p () 
556 && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0) 
557 { 
558 return -1; 
559 } 
560 
561 return 0; 
562} 
563 
564/* Try to grab a lock on a mutex. */ 
565static inline int 
566__gthread_objc_mutex_trylock (objc_mutex_t mutex) 
567{ 
568 if (__gthread_active_p () 
569 && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0) 
570 { 
571 return -1; 
572 } 
573 
574 return 0; 
575} 
576 
577/* Unlock the mutex */ 
578static inline int 
579__gthread_objc_mutex_unlock (objc_mutex_t mutex) 
580{ 
581 if (__gthread_active_p () 
582 && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0) 
583 { 
584 return -1; 
585 } 
586 
587 return 0; 
588} 
589 
590/* Backend condition mutex functions */ 
591 
592/* Allocate a condition. */ 
593static inline int 
594__gthread_objc_condition_allocate (objc_condition_t condition) 
595{ 
596 if (__gthread_active_p ()) 
597 { 
598 condition->backend = objc_malloc (sizeof (pthread_cond_t)); 
599 
600 if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL)) 
601 { 
602 objc_free (condition->backend); 
603 condition->backend = NULL; 
604 return -1; 
605 } 
606 } 
607 
608 return 0; 
609} 
610 
611/* Deallocate a condition. */ 
612static inline int 
613__gthread_objc_condition_deallocate (objc_condition_t condition) 
614{ 
615 if (__gthread_active_p ()) 
616 { 
617 if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend)) 
618 return -1; 
619 
620 objc_free (condition->backend); 
621 condition->backend = NULL; 
622 } 
623 return 0; 
624} 
625 
626/* Wait on the condition */ 
627static inline int 
628__gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) 
629{ 
630 if (__gthread_active_p ()) 
631 return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend, 
632 (pthread_mutex_t *) mutex->backend); 
633 else 
634 return 0; 
635} 
636 
637/* Wake up all threads waiting on this condition. */ 
638static inline int 
639__gthread_objc_condition_broadcast (objc_condition_t condition) 
640{ 
641 if (__gthread_active_p ()) 
642 return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend); 
643 else 
644 return 0; 
645} 
646 
647/* Wake up one thread waiting on this condition. */ 
648static inline int 
649__gthread_objc_condition_signal (objc_condition_t condition) 
650{ 
651 if (__gthread_active_p ()) 
652 return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend); 
653 else 
654 return 0; 
655} 
656 
657#else /* _LIBOBJC */ 
658 
659static inline int 
660__gthread_create (__gthread_t *__threadid, void *(*__func) (void*), 
661 void *__args) 
662{ 
663 return __gthrw_(pthread_create) (__threadid, NULL, __func, __args); 
664} 
665 
666static inline int 
667__gthread_join (__gthread_t __threadid, void **__value_ptr) 
668{ 
669 return __gthrw_(pthread_join) (__threadid, __value_ptr); 
670} 
671 
672static inline int 
673__gthread_detach (__gthread_t __threadid) 
674{ 
675 return __gthrw_(pthread_detach) (__threadid); 
676} 
677 
678static inline int 
679__gthread_equal (__gthread_t __t1, __gthread_t __t2) 
680{ 
681 return __gthrw_(pthread_equal) (__t1, __t2); 
682} 
683 
684static inline __gthread_t 
685__gthread_self (void) 
686{ 
687 return __gthrw_(pthread_self) (); 
688} 
689 
690static inline int 
691__gthread_yield (void) 
692{ 
693 return __gthrw_(sched_yield) (); 
694} 
695 
696static inline int 
697__gthread_once (__gthread_once_t *__once, void (*__func) (void)) 
698{ 
699 if (__gthread_active_p ()) 
700 return __gthrw_(pthread_once) (__once, __func); 
701 else 
702 return -1; 
703} 
704 
705static inline int 
706__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *)) 
707{ 
708 return __gthrw_(pthread_key_create) (__key, __dtor); 
709} 
710 
711static inline int 
712__gthread_key_delete (__gthread_key_t __key) 
713{ 
714 return __gthrw_(pthread_key_delete) (__key); 
715} 
716 
717static inline void * 
718__gthread_getspecific (__gthread_key_t __key) 
719{ 
720 return __gthrw_(pthread_getspecific) (__key); 
721} 
722 
723static inline int 
724__gthread_setspecific (__gthread_key_t __key, const void *__ptr) 
725{ 
726 return __gthrw_(pthread_setspecific) (__key, __ptr); 
727} 
728 
729static inline void 
730__gthread_mutex_init_function (__gthread_mutex_t *__mutex) 
731{ 
732 if (__gthread_active_p ()) 
733 __gthrw_(pthread_mutex_init) (__mutex, NULL); 
734} 
735 
736static inline int 
737__gthread_mutex_destroy (__gthread_mutex_t *__mutex) 
738{ 
739 if (__gthread_active_p ()) 
740 return __gthrw_(pthread_mutex_destroy) (__mutex); 
741 else 
742 return 0; 
743} 
744 
745static inline int 
746__gthread_mutex_lock (__gthread_mutex_t *__mutex) 
747{ 
748 if (__gthread_active_p ()) 
749 return __gthrw_(pthread_mutex_lock) (__mutex); 
750 else 
751 return 0; 
752} 
753 
754static inline int 
755__gthread_mutex_trylock (__gthread_mutex_t *__mutex) 
756{ 
757 if (__gthread_active_p ()) 
758 return __gthrw_(pthread_mutex_trylock) (__mutex); 
759 else 
760 return 0; 
761} 
762 
763#if _GTHREAD_USE_MUTEX_TIMEDLOCK 
764static inline int 
765__gthread_mutex_timedlock (__gthread_mutex_t *__mutex, 
766 const __gthread_time_t *__abs_timeout) 
767{ 
768 if (__gthread_active_p ()) 
769 return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout); 
770 else 
771 return 0; 
772} 
773#endif 
774 
775static inline int 
776__gthread_mutex_unlock (__gthread_mutex_t *__mutex) 
777{ 
778 if (__gthread_active_p ()) 
779 return __gthrw_(pthread_mutex_unlock) (__mutex); 
780 else 
781 return 0; 
782} 
783 
784#if !defined( PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) \ 
785 || defined(_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC) 
786static inline int 
787__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) 
788{ 
789 if (__gthread_active_p ()) 
790 { 
791 pthread_mutexattr_t __attr; 
792 int __r; 
793 
794 __r = __gthrw_(pthread_mutexattr_init) (&__attr); 
795 if (!__r) 
796 __r = __gthrw_(pthread_mutexattr_settype) (&__attr, 
797 PTHREAD_MUTEX_RECURSIVE); 
798 if (!__r) 
799 __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr); 
800 if (!__r) 
801 __r = __gthrw_(pthread_mutexattr_destroy) (&__attr); 
802 return __r; 
803 } 
804 return 0; 
805} 
806#endif 
807 
808static inline int 
809__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) 
810{ 
811 return __gthread_mutex_lock (__mutex); 
812} 
813 
814static inline int 
815__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) 
816{ 
817 return __gthread_mutex_trylock (__mutex); 
818} 
819 
820#if _GTHREAD_USE_MUTEX_TIMEDLOCK 
821static inline int 
822__gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex, 
823 const __gthread_time_t *__abs_timeout) 
824{ 
825 return __gthread_mutex_timedlock (__mutex, __abs_timeout); 
826} 
827#endif 
828 
829static inline int 
830__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) 
831{ 
832 return __gthread_mutex_unlock (__mutex); 
833} 
834 
835static inline int 
836__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) 
837{ 
838 return __gthread_mutex_destroy (__mutex); 
839} 
840 
841#ifdef _GTHREAD_USE_COND_INIT_FUNC 
842static inline void 
843__gthread_cond_init_function (__gthread_cond_t *__cond) 
844{ 
845 if (__gthread_active_p ()) 
846 __gthrw_(pthread_cond_init) (__cond, NULL); 
847} 
848#endif 
849 
850static inline int 
851__gthread_cond_broadcast (__gthread_cond_t *__cond) 
852{ 
853 return __gthrw_(pthread_cond_broadcast) (__cond); 
854} 
855 
856static inline int 
857__gthread_cond_signal (__gthread_cond_t *__cond) 
858{ 
859 return __gthrw_(pthread_cond_signal) (__cond); 
860} 
861 
862static inline int 
863__gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex) 
864{ 
865 return __gthrw_(pthread_cond_wait) (__cond, __mutex); 
866} 
867 
868static inline int 
869__gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex, 
870 const __gthread_time_t *__abs_timeout) 
871{ 
872 return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout); 
873} 
874 
875static inline int 
876__gthread_cond_wait_recursive (__gthread_cond_t *__cond, 
877 __gthread_recursive_mutex_t *__mutex) 
878{ 
879 return __gthread_cond_wait (__cond, __mutex); 
880} 
881 
882static inline int 
883__gthread_cond_destroy (__gthread_cond_t* __cond) 
884{ 
885 return __gthrw_(pthread_cond_destroy) (__cond); 
886} 
887 
888#endif /* _LIBOBJC */ 
889 
890#endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */ 
891