|
0
|
1 /* Threads compatibility routines for libgcc2 and libobjc. */
|
|
|
2 /* Compile this one with gcc. */
|
|
|
3 /* Copyright (C) 2004, 2005, 2007, 2008, 2009 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 GCC_GTHR_POSIX_H
|
|
|
27 #define 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
|
|
|
34 /* Some implementations of <pthread.h> require this to be defined. */
|
|
|
35 #ifndef _REENTRANT
|
|
|
36 #define _REENTRANT 1
|
|
|
37 #endif
|
|
|
38
|
|
|
39 #include <pthread.h>
|
|
|
40 #include <unistd.h>
|
|
|
41
|
|
|
42 typedef pthread_key_t __gthread_key_t;
|
|
|
43 typedef pthread_once_t __gthread_once_t;
|
|
|
44 typedef pthread_mutex_t __gthread_mutex_t;
|
|
|
45 typedef pthread_cond_t __gthread_cond_t;
|
|
|
46
|
|
|
47 /* POSIX like conditional variables are supported. Please look at comments
|
|
|
48 in gthr.h for details. */
|
|
|
49 #define __GTHREAD_HAS_COND 1
|
|
|
50
|
|
|
51 typedef struct {
|
|
|
52 long depth;
|
|
|
53 pthread_t owner;
|
|
|
54 pthread_mutex_t actual;
|
|
|
55 } __gthread_recursive_mutex_t;
|
|
|
56
|
|
|
57 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
|
|
|
58 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
|
|
|
59 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
|
|
|
60 #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
|
|
|
61
|
|
|
62 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
|
|
|
63 # define __gthrw(name) \
|
|
|
64 static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
|
|
|
65 # define __gthrw_(name) __gthrw_ ## name
|
|
|
66 #else
|
|
|
67 # define __gthrw(name)
|
|
|
68 # define __gthrw_(name) name
|
|
|
69 #endif
|
|
|
70
|
|
|
71 __gthrw(pthread_once)
|
|
|
72 __gthrw(pthread_key_create)
|
|
|
73 __gthrw(pthread_key_delete)
|
|
|
74 __gthrw(pthread_getspecific)
|
|
|
75 __gthrw(pthread_setspecific)
|
|
|
76 __gthrw(pthread_create)
|
|
|
77 __gthrw(pthread_cancel)
|
|
|
78 __gthrw(pthread_self)
|
|
|
79
|
|
|
80 __gthrw(pthread_mutex_init)
|
|
|
81 __gthrw(pthread_mutex_destroy)
|
|
|
82 __gthrw(pthread_mutex_lock)
|
|
|
83 __gthrw(pthread_mutex_trylock)
|
|
|
84 __gthrw(pthread_mutex_unlock)
|
|
|
85 __gthrw(pthread_mutexattr_init)
|
|
|
86 __gthrw(pthread_mutexattr_destroy)
|
|
|
87
|
|
|
88 __gthrw(pthread_cond_broadcast)
|
|
|
89 __gthrw(pthread_cond_wait)
|
|
|
90
|
|
|
91 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
|
|
|
92 /* Objective-C. */
|
|
|
93 __gthrw(pthread_cond_destroy)
|
|
|
94 __gthrw(pthread_cond_init)
|
|
|
95 __gthrw(pthread_cond_signal)
|
|
|
96 __gthrw(pthread_exit)
|
|
|
97 #ifdef _POSIX_PRIORITY_SCHEDULING
|
|
|
98 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
99 __gthrw(sched_get_priority_max)
|
|
|
100 __gthrw(sched_get_priority_min)
|
|
|
101 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
102 #endif /* _POSIX_PRIORITY_SCHEDULING */
|
|
|
103 __gthrw(sched_yield)
|
|
|
104 __gthrw(pthread_attr_destroy)
|
|
|
105 __gthrw(pthread_attr_init)
|
|
|
106 __gthrw(pthread_attr_setdetachstate)
|
|
|
107 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
108 __gthrw(pthread_getschedparam)
|
|
|
109 __gthrw(pthread_setschedparam)
|
|
|
110 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
111 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
|
|
|
112
|
|
|
113 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
|
|
|
114
|
|
|
115 /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
|
|
|
116 -pthreads is not specified. The functions are dummies and most return an
|
|
|
117 error value. However pthread_once returns 0 without invoking the routine
|
|
|
118 it is passed so we cannot pretend that the interface is active if -pthreads
|
|
|
119 is not specified. On Solaris 2.5.1, the interface is not exposed at all so
|
|
|
120 we need to play the usual game with weak symbols. On Solaris 10 and up, a
|
|
|
121 working interface is always exposed. On FreeBSD 6 and later, libc also
|
|
|
122 exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
|
|
|
123 to 9 does. FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
|
|
|
124 which means the alternate __gthread_active_p below cannot be used there. */
|
|
|
125
|
|
|
126 #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
|
|
|
127
|
|
|
128 static volatile int __gthread_active = -1;
|
|
|
129
|
|
|
130 static void
|
|
|
131 __gthread_trigger (void)
|
|
|
132 {
|
|
|
133 __gthread_active = 1;
|
|
|
134 }
|
|
|
135
|
|
|
136 static inline int
|
|
|
137 __gthread_active_p (void)
|
|
|
138 {
|
|
|
139 static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
140 static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
|
|
|
141
|
|
|
142 /* Avoid reading __gthread_active twice on the main code path. */
|
|
|
143 int __gthread_active_latest_value = __gthread_active;
|
|
|
144
|
|
|
145 /* This test is not protected to avoid taking a lock on the main code
|
|
|
146 path so every update of __gthread_active in a threaded program must
|
|
|
147 be atomic with regard to the result of the test. */
|
|
|
148 if (__builtin_expect (__gthread_active_latest_value < 0, 0))
|
|
|
149 {
|
|
|
150 if (__gthrw_(pthread_once))
|
|
|
151 {
|
|
|
152 /* If this really is a threaded program, then we must ensure that
|
|
|
153 __gthread_active has been set to 1 before exiting this block. */
|
|
|
154 __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
|
|
|
155 __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
|
|
|
156 __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
|
|
|
157 }
|
|
|
158
|
|
|
159 /* Make sure we'll never enter this block again. */
|
|
|
160 if (__gthread_active < 0)
|
|
|
161 __gthread_active = 0;
|
|
|
162
|
|
|
163 __gthread_active_latest_value = __gthread_active;
|
|
|
164 }
|
|
|
165
|
|
|
166 return __gthread_active_latest_value != 0;
|
|
|
167 }
|
|
|
168
|
|
|
169 #else /* neither FreeBSD nor Solaris */
|
|
|
170
|
|
|
171 static inline int
|
|
|
172 __gthread_active_p (void)
|
|
|
173 {
|
|
|
174 static void *const __gthread_active_ptr
|
|
|
175 = __extension__ (void *) &__gthrw_(pthread_cancel);
|
|
|
176 return __gthread_active_ptr != 0;
|
|
|
177 }
|
|
|
178
|
|
|
179 #endif /* FreeBSD or Solaris */
|
|
|
180
|
|
|
181 #else /* not SUPPORTS_WEAK */
|
|
|
182
|
|
|
183 /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
|
|
|
184 calls in shared flavors of the HP-UX C library. Most of the stubs
|
|
|
185 have no functionality. The details are described in the "libc cumulative
|
|
|
186 patch" for each subversion of HP-UX 11. There are two special interfaces
|
|
|
187 provided for checking whether an application is linked to a pthread
|
|
|
188 library or not. However, these interfaces aren't available in early
|
|
|
189 libc versions. We also can't use pthread_once as some libc versions
|
|
|
190 call the init function. So, we use pthread_create to check whether it
|
|
|
191 is possible to create a thread or not. The stub implementation returns
|
|
|
192 the error number ENOSYS. */
|
|
|
193
|
|
|
194 #if defined(__hppa__) && defined(__hpux__)
|
|
|
195
|
|
|
196 #include <errno.h>
|
|
|
197
|
|
|
198 static volatile int __gthread_active = -1;
|
|
|
199
|
|
|
200 static void *
|
|
|
201 __gthread_start (void *arg __attribute__((unused)))
|
|
|
202 {
|
|
|
203 return NULL;
|
|
|
204 }
|
|
|
205
|
|
|
206 static void __gthread_active_init (void) __attribute__((noinline));
|
|
|
207 static void
|
|
|
208 __gthread_active_init (void)
|
|
|
209 {
|
|
|
210 static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
211 pthread_t t;
|
|
|
212 pthread_attr_t a;
|
|
|
213 int result;
|
|
|
214
|
|
|
215 __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
|
|
|
216 if (__gthread_active < 0)
|
|
|
217 {
|
|
|
218 __gthrw_(pthread_attr_init) (&a);
|
|
|
219 __gthrw_(pthread_attr_setdetachstate) (&a, PTHREAD_CREATE_DETACHED);
|
|
|
220 result = __gthrw_(pthread_create) (&t, &a, __gthread_start, NULL);
|
|
|
221 if (result != ENOSYS)
|
|
|
222 __gthread_active = 1;
|
|
|
223 else
|
|
|
224 __gthread_active = 0;
|
|
|
225 __gthrw_(pthread_attr_destroy) (&a);
|
|
|
226 }
|
|
|
227 __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
|
|
|
228 }
|
|
|
229
|
|
|
230 static inline int
|
|
|
231 __gthread_active_p (void)
|
|
|
232 {
|
|
|
233 /* Avoid reading __gthread_active twice on the main code path. */
|
|
|
234 int __gthread_active_latest_value = __gthread_active;
|
|
|
235
|
|
|
236 /* This test is not protected to avoid taking a lock on the main code
|
|
|
237 path so every update of __gthread_active in a threaded program must
|
|
|
238 be atomic with regard to the result of the test. */
|
|
|
239 if (__builtin_expect (__gthread_active_latest_value < 0, 0))
|
|
|
240 {
|
|
|
241 __gthread_active_init ();
|
|
|
242 __gthread_active_latest_value = __gthread_active;
|
|
|
243 }
|
|
|
244
|
|
|
245 return __gthread_active_latest_value != 0;
|
|
|
246 }
|
|
|
247
|
|
|
248 #else /* not hppa-hpux */
|
|
|
249
|
|
|
250 static inline int
|
|
|
251 __gthread_active_p (void)
|
|
|
252 {
|
|
|
253 return 1;
|
|
|
254 }
|
|
|
255
|
|
|
256 #endif /* hppa-hpux */
|
|
|
257
|
|
|
258 #endif /* SUPPORTS_WEAK */
|
|
|
259
|
|
|
260 #ifdef _LIBOBJC
|
|
|
261
|
|
|
262 /* This is the config.h file in libobjc/ */
|
|
|
263 #include <config.h>
|
|
|
264
|
|
|
265 #ifdef HAVE_SCHED_H
|
|
|
266 # include <sched.h>
|
|
|
267 #endif
|
|
|
268
|
|
|
269 /* Key structure for maintaining thread specific storage */
|
|
|
270 static pthread_key_t _objc_thread_storage;
|
|
|
271 static pthread_attr_t _objc_thread_attribs;
|
|
|
272
|
|
|
273 /* Thread local storage for a single thread */
|
|
|
274 static void *thread_local_storage = NULL;
|
|
|
275
|
|
|
276 /* Backend initialization functions */
|
|
|
277
|
|
|
278 /* Initialize the threads subsystem. */
|
|
|
279 static inline int
|
|
|
280 __gthread_objc_init_thread_system (void)
|
|
|
281 {
|
|
|
282 if (__gthread_active_p ())
|
|
|
283 {
|
|
|
284 /* Initialize the thread storage key. */
|
|
|
285 if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
|
|
|
286 {
|
|
|
287 /* The normal default detach state for threads is
|
|
|
288 * PTHREAD_CREATE_JOINABLE which causes threads to not die
|
|
|
289 * when you think they should. */
|
|
|
290 if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
|
|
|
291 && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
|
|
|
292 PTHREAD_CREATE_DETACHED) == 0)
|
|
|
293 return 0;
|
|
|
294 }
|
|
|
295 }
|
|
|
296
|
|
|
297 return -1;
|
|
|
298 }
|
|
|
299
|
|
|
300 /* Close the threads subsystem. */
|
|
|
301 static inline int
|
|
|
302 __gthread_objc_close_thread_system (void)
|
|
|
303 {
|
|
|
304 if (__gthread_active_p ()
|
|
|
305 && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
|
|
|
306 && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
|
|
|
307 return 0;
|
|
|
308
|
|
|
309 return -1;
|
|
|
310 }
|
|
|
311
|
|
|
312 /* Backend thread functions */
|
|
|
313
|
|
|
314 /* Create a new thread of execution. */
|
|
|
315 static inline objc_thread_t
|
|
|
316 __gthread_objc_thread_detach (void (*func)(void *), void *arg)
|
|
|
317 {
|
|
|
318 objc_thread_t thread_id;
|
|
|
319 pthread_t new_thread_handle;
|
|
|
320
|
|
|
321 if (!__gthread_active_p ())
|
|
|
322 return NULL;
|
|
|
323
|
|
|
324 if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
|
|
|
325 thread_id = (objc_thread_t) new_thread_handle;
|
|
|
326 else
|
|
|
327 thread_id = NULL;
|
|
|
328
|
|
|
329 return thread_id;
|
|
|
330 }
|
|
|
331
|
|
|
332 /* Set the current thread's priority. */
|
|
|
333 static inline int
|
|
|
334 __gthread_objc_thread_set_priority (int priority)
|
|
|
335 {
|
|
|
336 if (!__gthread_active_p ())
|
|
|
337 return -1;
|
|
|
338 else
|
|
|
339 {
|
|
|
340 #ifdef _POSIX_PRIORITY_SCHEDULING
|
|
|
341 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
342 pthread_t thread_id = __gthrw_(pthread_self) ();
|
|
|
343 int policy;
|
|
|
344 struct sched_param params;
|
|
|
345 int priority_min, priority_max;
|
|
|
346
|
|
|
347 if (__gthrw_(pthread_getschedparam) (thread_id, &policy, ¶ms) == 0)
|
|
|
348 {
|
|
|
349 if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
|
|
|
350 return -1;
|
|
|
351
|
|
|
352 if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
|
|
|
353 return -1;
|
|
|
354
|
|
|
355 if (priority > priority_max)
|
|
|
356 priority = priority_max;
|
|
|
357 else if (priority < priority_min)
|
|
|
358 priority = priority_min;
|
|
|
359 params.sched_priority = priority;
|
|
|
360
|
|
|
361 /*
|
|
|
362 * The solaris 7 and several other man pages incorrectly state that
|
|
|
363 * this should be a pointer to policy but pthread.h is universally
|
|
|
364 * at odds with this.
|
|
|
365 */
|
|
|
366 if (__gthrw_(pthread_setschedparam) (thread_id, policy, ¶ms) == 0)
|
|
|
367 return 0;
|
|
|
368 }
|
|
|
369 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
370 #endif /* _POSIX_PRIORITY_SCHEDULING */
|
|
|
371 return -1;
|
|
|
372 }
|
|
|
373 }
|
|
|
374
|
|
|
375 /* Return the current thread's priority. */
|
|
|
376 static inline int
|
|
|
377 __gthread_objc_thread_get_priority (void)
|
|
|
378 {
|
|
|
379 #ifdef _POSIX_PRIORITY_SCHEDULING
|
|
|
380 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
|
|
|
381 if (__gthread_active_p ())
|
|
|
382 {
|
|
|
383 int policy;
|
|
|
384 struct sched_param params;
|
|
|
385
|
|
|
386 if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, ¶ms) == 0)
|
|
|
387 return params.sched_priority;
|
|
|
388 else
|
|
|
389 return -1;
|
|
|
390 }
|
|
|
391 else
|
|
|
392 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
|
|
|
393 #endif /* _POSIX_PRIORITY_SCHEDULING */
|
|
|
394 return OBJC_THREAD_INTERACTIVE_PRIORITY;
|
|
|
395 }
|
|
|
396
|
|
|
397 /* Yield our process time to another thread. */
|
|
|
398 static inline void
|
|
|
399 __gthread_objc_thread_yield (void)
|
|
|
400 {
|
|
|
401 if (__gthread_active_p ())
|
|
|
402 __gthrw_(sched_yield) ();
|
|
|
403 }
|
|
|
404
|
|
|
405 /* Terminate the current thread. */
|
|
|
406 static inline int
|
|
|
407 __gthread_objc_thread_exit (void)
|
|
|
408 {
|
|
|
409 if (__gthread_active_p ())
|
|
|
410 /* exit the thread */
|
|
|
411 __gthrw_(pthread_exit) (&__objc_thread_exit_status);
|
|
|
412
|
|
|
413 /* Failed if we reached here */
|
|
|
414 return -1;
|
|
|
415 }
|
|
|
416
|
|
|
417 /* Returns an integer value which uniquely describes a thread. */
|
|
|
418 static inline objc_thread_t
|
|
|
419 __gthread_objc_thread_id (void)
|
|
|
420 {
|
|
|
421 if (__gthread_active_p ())
|
|
|
422 return (objc_thread_t) __gthrw_(pthread_self) ();
|
|
|
423 else
|
|
|
424 return (objc_thread_t) 1;
|
|
|
425 }
|
|
|
426
|
|
|
427 /* Sets the thread's local storage pointer. */
|
|
|
428 static inline int
|
|
|
429 __gthread_objc_thread_set_data (void *value)
|
|
|
430 {
|
|
|
431 if (__gthread_active_p ())
|
|
|
432 return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
|
|
|
433 else
|
|
|
434 {
|
|
|
435 thread_local_storage = value;
|
|
|
436 return 0;
|
|
|
437 }
|
|
|
438 }
|
|
|
439
|
|
|
440 /* Returns the thread's local storage pointer. */
|
|
|
441 static inline void *
|
|
|
442 __gthread_objc_thread_get_data (void)
|
|
|
443 {
|
|
|
444 if (__gthread_active_p ())
|
|
|
445 return __gthrw_(pthread_getspecific) (_objc_thread_storage);
|
|
|
446 else
|
|
|
447 return thread_local_storage;
|
|
|
448 }
|
|
|
449
|
|
|
450 /* Backend mutex functions */
|
|
|
451
|
|
|
452 /* Allocate a mutex. */
|
|
|
453 static inline int
|
|
|
454 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
|
|
|
455 {
|
|
|
456 if (__gthread_active_p ())
|
|
|
457 {
|
|
|
458 mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
|
|
|
459
|
|
|
460 if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
|
|
|
461 {
|
|
|
462 objc_free (mutex->backend);
|
|
|
463 mutex->backend = NULL;
|
|
|
464 return -1;
|
|
|
465 }
|
|
|
466 }
|
|
|
467
|
|
|
468 return 0;
|
|
|
469 }
|
|
|
470
|
|
|
471 /* Deallocate a mutex. */
|
|
|
472 static inline int
|
|
|
473 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
|
|
|
474 {
|
|
|
475 if (__gthread_active_p ())
|
|
|
476 {
|
|
|
477 int count;
|
|
|
478
|
|
|
479 /*
|
|
|
480 * Posix Threads specifically require that the thread be unlocked
|
|
|
481 * for __gthrw_(pthread_mutex_destroy) to work.
|
|
|
482 */
|
|
|
483
|
|
|
484 do
|
|
|
485 {
|
|
|
486 count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
|
|
|
487 if (count < 0)
|
|
|
488 return -1;
|
|
|
489 }
|
|
|
490 while (count);
|
|
|
491
|
|
|
492 if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
|
|
|
493 return -1;
|
|
|
494
|
|
|
495 objc_free (mutex->backend);
|
|
|
496 mutex->backend = NULL;
|
|
|
497 }
|
|
|
498 return 0;
|
|
|
499 }
|
|
|
500
|
|
|
501 /* Grab a lock on a mutex. */
|
|
|
502 static inline int
|
|
|
503 __gthread_objc_mutex_lock (objc_mutex_t mutex)
|
|
|
504 {
|
|
|
505 if (__gthread_active_p ()
|
|
|
506 && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
507 {
|
|
|
508 return -1;
|
|
|
509 }
|
|
|
510
|
|
|
511 return 0;
|
|
|
512 }
|
|
|
513
|
|
|
514 /* Try to grab a lock on a mutex. */
|
|
|
515 static inline int
|
|
|
516 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
|
|
|
517 {
|
|
|
518 if (__gthread_active_p ()
|
|
|
519 && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
520 {
|
|
|
521 return -1;
|
|
|
522 }
|
|
|
523
|
|
|
524 return 0;
|
|
|
525 }
|
|
|
526
|
|
|
527 /* Unlock the mutex */
|
|
|
528 static inline int
|
|
|
529 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
|
|
|
530 {
|
|
|
531 if (__gthread_active_p ()
|
|
|
532 && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
|
|
|
533 {
|
|
|
534 return -1;
|
|
|
535 }
|
|
|
536
|
|
|
537 return 0;
|
|
|
538 }
|
|
|
539
|
|
|
540 /* Backend condition mutex functions */
|
|
|
541
|
|
|
542 /* Allocate a condition. */
|
|
|
543 static inline int
|
|
|
544 __gthread_objc_condition_allocate (objc_condition_t condition)
|
|
|
545 {
|
|
|
546 if (__gthread_active_p ())
|
|
|
547 {
|
|
|
548 condition->backend = objc_malloc (sizeof (pthread_cond_t));
|
|
|
549
|
|
|
550 if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
|
|
|
551 {
|
|
|
552 objc_free (condition->backend);
|
|
|
553 condition->backend = NULL;
|
|
|
554 return -1;
|
|
|
555 }
|
|
|
556 }
|
|
|
557
|
|
|
558 return 0;
|
|
|
559 }
|
|
|
560
|
|
|
561 /* Deallocate a condition. */
|
|
|
562 static inline int
|
|
|
563 __gthread_objc_condition_deallocate (objc_condition_t condition)
|
|
|
564 {
|
|
|
565 if (__gthread_active_p ())
|
|
|
566 {
|
|
|
567 if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
|
|
|
568 return -1;
|
|
|
569
|
|
|
570 objc_free (condition->backend);
|
|
|
571 condition->backend = NULL;
|
|
|
572 }
|
|
|
573 return 0;
|
|
|
574 }
|
|
|
575
|
|
|
576 /* Wait on the condition */
|
|
|
577 static inline int
|
|
|
578 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
|
|
|
579 {
|
|
|
580 if (__gthread_active_p ())
|
|
|
581 return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
|
|
|
582 (pthread_mutex_t *) mutex->backend);
|
|
|
583 else
|
|
|
584 return 0;
|
|
|
585 }
|
|
|
586
|
|
|
587 /* Wake up all threads waiting on this condition. */
|
|
|
588 static inline int
|
|
|
589 __gthread_objc_condition_broadcast (objc_condition_t condition)
|
|
|
590 {
|
|
|
591 if (__gthread_active_p ())
|
|
|
592 return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
|
|
|
593 else
|
|
|
594 return 0;
|
|
|
595 }
|
|
|
596
|
|
|
597 /* Wake up one thread waiting on this condition. */
|
|
|
598 static inline int
|
|
|
599 __gthread_objc_condition_signal (objc_condition_t condition)
|
|
|
600 {
|
|
|
601 if (__gthread_active_p ())
|
|
|
602 return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
|
|
|
603 else
|
|
|
604 return 0;
|
|
|
605 }
|
|
|
606
|
|
|
607 #else /* _LIBOBJC */
|
|
|
608
|
|
|
609 static inline int
|
|
|
610 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
|
|
|
611 {
|
|
|
612 if (__gthread_active_p ())
|
|
|
613 return __gthrw_(pthread_once) (__once, __func);
|
|
|
614 else
|
|
|
615 return -1;
|
|
|
616 }
|
|
|
617
|
|
|
618 static inline int
|
|
|
619 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
|
|
|
620 {
|
|
|
621 return __gthrw_(pthread_key_create) (__key, __dtor);
|
|
|
622 }
|
|
|
623
|
|
|
624 static inline int
|
|
|
625 __gthread_key_delete (__gthread_key_t __key)
|
|
|
626 {
|
|
|
627 return __gthrw_(pthread_key_delete) (__key);
|
|
|
628 }
|
|
|
629
|
|
|
630 static inline void *
|
|
|
631 __gthread_getspecific (__gthread_key_t __key)
|
|
|
632 {
|
|
|
633 return __gthrw_(pthread_getspecific) (__key);
|
|
|
634 }
|
|
|
635
|
|
|
636 static inline int
|
|
|
637 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
|
|
|
638 {
|
|
|
639 return __gthrw_(pthread_setspecific) (__key, __ptr);
|
|
|
640 }
|
|
|
641
|
|
|
642 static inline int
|
|
|
643 __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
|
|
|
644 {
|
|
|
645 if (__gthread_active_p ())
|
|
|
646 return __gthrw_(pthread_mutex_destroy) (__mutex);
|
|
|
647 else
|
|
|
648 return 0;
|
|
|
649 }
|
|
|
650
|
|
|
651 static inline int
|
|
|
652 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
|
|
|
653 {
|
|
|
654 if (__gthread_active_p ())
|
|
|
655 return __gthrw_(pthread_mutex_lock) (__mutex);
|
|
|
656 else
|
|
|
657 return 0;
|
|
|
658 }
|
|
|
659
|
|
|
660 static inline int
|
|
|
661 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
|
|
|
662 {
|
|
|
663 if (__gthread_active_p ())
|
|
|
664 return __gthrw_(pthread_mutex_trylock) (__mutex);
|
|
|
665 else
|
|
|
666 return 0;
|
|
|
667 }
|
|
|
668
|
|
|
669 static inline int
|
|
|
670 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
|
|
|
671 {
|
|
|
672 if (__gthread_active_p ())
|
|
|
673 return __gthrw_(pthread_mutex_unlock) (__mutex);
|
|
|
674 else
|
|
|
675 return 0;
|
|
|
676 }
|
|
|
677
|
|
|
678 static inline int
|
|
|
679 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
|
|
|
680 {
|
|
|
681 __mutex->depth = 0;
|
|
|
682 __mutex->owner = (pthread_t) 0;
|
|
|
683 return __gthrw_(pthread_mutex_init) (&__mutex->actual, NULL);
|
|
|
684 }
|
|
|
685
|
|
|
686 static inline int
|
|
|
687 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
|
|
|
688 {
|
|
|
689 if (__gthread_active_p ())
|
|
|
690 {
|
|
|
691 pthread_t __me = __gthrw_(pthread_self) ();
|
|
|
692
|
|
|
693 if (__mutex->owner != __me)
|
|
|
694 {
|
|
|
695 __gthrw_(pthread_mutex_lock) (&__mutex->actual);
|
|
|
696 __mutex->owner = __me;
|
|
|
697 }
|
|
|
698
|
|
|
699 __mutex->depth++;
|
|
|
700 }
|
|
|
701 return 0;
|
|
|
702 }
|
|
|
703
|
|
|
704 static inline int
|
|
|
705 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
|
|
|
706 {
|
|
|
707 if (__gthread_active_p ())
|
|
|
708 {
|
|
|
709 pthread_t __me = __gthrw_(pthread_self) ();
|
|
|
710
|
|
|
711 if (__mutex->owner != __me)
|
|
|
712 {
|
|
|
713 if (__gthrw_(pthread_mutex_trylock) (&__mutex->actual))
|
|
|
714 return 1;
|
|
|
715 __mutex->owner = __me;
|
|
|
716 }
|
|
|
717
|
|
|
718 __mutex->depth++;
|
|
|
719 }
|
|
|
720 return 0;
|
|
|
721 }
|
|
|
722
|
|
|
723 static inline int
|
|
|
724 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
|
|
|
725 {
|
|
|
726 if (__gthread_active_p ())
|
|
|
727 {
|
|
|
728 if (--__mutex->depth == 0)
|
|
|
729 {
|
|
|
730 __mutex->owner = (pthread_t) 0;
|
|
|
731 __gthrw_(pthread_mutex_unlock) (&__mutex->actual);
|
|
|
732 }
|
|
|
733 }
|
|
|
734 return 0;
|
|
|
735 }
|
|
|
736
|
|
|
737 static inline int
|
|
|
738 __gthread_cond_broadcast (__gthread_cond_t *__cond)
|
|
|
739 {
|
|
|
740 return __gthrw_(pthread_cond_broadcast) (__cond);
|
|
|
741 }
|
|
|
742
|
|
|
743 static inline int
|
|
|
744 __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
|
|
|
745 {
|
|
|
746 return __gthrw_(pthread_cond_wait) (__cond, __mutex);
|
|
|
747 }
|
|
|
748
|
|
|
749 static inline int
|
|
|
750 __gthread_cond_wait_recursive (__gthread_cond_t *__cond,
|
|
|
751 __gthread_recursive_mutex_t *__mutex)
|
|
|
752 {
|
|
|
753 return __gthrw_(pthread_cond_wait) (__cond, &__mutex->actual);
|
|
|
754 }
|
|
|
755
|
|
|
756 #endif /* _LIBOBJC */
|
|
|
757
|
|
|
758 #endif /* ! GCC_GTHR_POSIX_H */
|
