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f24af81b TT |
1 | |
2 | /* Compile this one with gcc. */ | |
5467baef | 3 | /* Copyright (C) 1997, 1999, 2000, 2001 Free Software Foundation, Inc. |
f24af81b | 4 | |
1322177d | 5 | This file is part of GCC. |
f24af81b | 6 | |
1322177d LB |
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 2, or (at your option) any later | |
10 | version. | |
f24af81b | 11 | |
1322177d LB |
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. | |
f24af81b TT |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
f24af81b TT |
21 | |
22 | /* As a special exception, if you link this library with other files, | |
23 | some of which are compiled with GCC, to produce an executable, | |
24 | this library does not by itself cause the resulting executable | |
25 | to be covered by the GNU General Public License. | |
26 | This exception does not however invalidate any other reasons why | |
27 | the executable file might be covered by the GNU General Public License. */ | |
28 | ||
88657302 RH |
29 | #ifndef GCC_GTHR_DCE_H |
30 | #define GCC_GTHR_DCE_H | |
f24af81b TT |
31 | |
32 | /* DCE threads interface. | |
33 | DCE threads are based on POSIX threads draft 4, and many things | |
34 | have changed since then. */ | |
35 | ||
36 | #define __GTHREADS 1 | |
37 | ||
38 | #include <pthread.h> | |
39 | ||
5467baef JDA |
40 | #ifdef __cplusplus |
41 | #define UNUSED(x) x | |
42 | #else | |
43 | #define UNUSED(x) x __attribute__((unused)) | |
44 | #endif | |
45 | ||
f24af81b TT |
46 | typedef pthread_key_t __gthread_key_t; |
47 | typedef pthread_once_t __gthread_once_t; | |
48 | typedef pthread_mutex_t __gthread_mutex_t; | |
49 | ||
50 | #define __GTHREAD_ONCE_INIT pthread_once_init | |
5241c227 JDA |
51 | |
52 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function | |
53 | ||
54 | #define __GTHREAD_MUTEX_INIT_DEFAULT pthread_once_init | |
f24af81b TT |
55 | |
56 | #if SUPPORTS_WEAK && GTHREAD_USE_WEAK | |
57 | ||
58 | #pragma weak pthread_once | |
59 | #pragma weak pthread_once_init | |
15794a95 | 60 | #pragma weak pthread_keycreate |
f24af81b TT |
61 | #pragma weak pthread_key_delete |
62 | #pragma weak pthread_getspecific | |
63 | #pragma weak pthread_setspecific | |
64 | #pragma weak pthread_create | |
5241c227 | 65 | #pragma weak pthread_mutex_init |
f24af81b TT |
66 | #pragma weak pthread_mutex_lock |
67 | #pragma weak pthread_mutex_trylock | |
68 | #pragma weak pthread_mutex_unlock | |
69 | ||
15794a95 L |
70 | #ifdef _LIBOBJC |
71 | /* Objective C. */ | |
72 | #pragma weak pthread_cond_broadcast | |
73 | #pragma weak pthread_cond_destroy | |
74 | #pragma weak pthread_cond_init | |
75 | #pragma weak pthread_cond_signal | |
76 | #pragma weak pthread_cond_wait | |
77 | #pragma weak pthread_exit | |
78 | #pragma weak pthread_getunique_np | |
15794a95 L |
79 | #pragma weak pthread_mutex_destroy |
80 | #pragma weak pthread_self | |
81 | #pragma weak pthread_yield | |
82 | #endif | |
83 | ||
f5fa2384 | 84 | static void *__gthread_active_ptr = (void *) &pthread_create; |
f24af81b TT |
85 | |
86 | static inline int | |
d1e51320 | 87 | __gthread_active_p (void) |
f24af81b TT |
88 | { |
89 | return __gthread_active_ptr != 0; | |
90 | } | |
91 | ||
92 | #else /* not SUPPORTS_WEAK */ | |
93 | ||
94 | static inline int | |
d1e51320 | 95 | __gthread_active_p (void) |
f24af81b TT |
96 | { |
97 | return 1; | |
98 | } | |
99 | ||
100 | #endif /* SUPPORTS_WEAK */ | |
101 | ||
15794a95 L |
102 | #ifdef _LIBOBJC |
103 | ||
104 | /* Key structure for maintaining thread specific storage */ | |
105 | static pthread_key_t _objc_thread_storage; | |
106 | ||
107 | /* Thread local storage for a single thread */ | |
108 | static void *thread_local_storage = NULL; | |
109 | ||
110 | /* Backend initialization functions */ | |
111 | ||
112 | /* Initialize the threads subsystem. */ | |
113 | static inline int | |
114 | __gthread_objc_init_thread_system(void) | |
115 | { | |
116 | if (__gthread_active_p ()) | |
117 | /* Initialize the thread storage key */ | |
118 | return pthread_keycreate (&_objc_thread_storage, NULL); | |
119 | else | |
120 | return -1; | |
121 | } | |
122 | ||
123 | /* Close the threads subsystem. */ | |
124 | static inline int | |
125 | __gthread_objc_close_thread_system(void) | |
126 | { | |
127 | if (__gthread_active_p ()) | |
128 | return 0; | |
129 | else | |
130 | return -1; | |
131 | } | |
132 | ||
133 | /* Backend thread functions */ | |
134 | ||
135 | /* Create a new thread of execution. */ | |
136 | static inline objc_thread_t | |
137 | __gthread_objc_thread_detach(void (*func)(void *), void *arg) | |
138 | { | |
139 | objc_thread_t thread_id; | |
140 | pthread_t new_thread_handle; | |
141 | ||
142 | if (!__gthread_active_p ()) | |
143 | return NULL; | |
144 | ||
145 | if ( !(pthread_create(&new_thread_handle, pthread_attr_default, | |
146 | (void *)func, arg)) ) | |
147 | { | |
148 | /* ??? May not work! (64bit) */ | |
149 | thread_id = *(objc_thread_t *)&new_thread_handle; | |
150 | pthread_detach(&new_thread_handle); /* Fully detach thread. */ | |
151 | } | |
152 | else | |
153 | thread_id = NULL; | |
154 | ||
155 | return thread_id; | |
156 | } | |
157 | ||
158 | /* Set the current thread's priority. */ | |
159 | static inline int | |
160 | __gthread_objc_thread_set_priority(int priority) | |
161 | { | |
162 | int sys_priority = 0; | |
163 | ||
164 | if (!__gthread_active_p ()) | |
165 | return -1; | |
166 | ||
167 | switch (priority) | |
168 | { | |
169 | case OBJC_THREAD_INTERACTIVE_PRIORITY: | |
170 | sys_priority = (PRI_FG_MIN_NP + PRI_FG_MAX_NP) / 2; | |
171 | break; | |
172 | default: | |
173 | case OBJC_THREAD_BACKGROUND_PRIORITY: | |
174 | sys_priority = (PRI_BG_MIN_NP + PRI_BG_MAX_NP) / 2; | |
175 | break; | |
176 | case OBJC_THREAD_LOW_PRIORITY: | |
177 | sys_priority = (PRI_BG_MIN_NP + PRI_BG_MAX_NP) / 2; | |
178 | break; | |
179 | } | |
180 | ||
181 | /* Change the priority. */ | |
182 | if (pthread_setprio(pthread_self(), sys_priority) >= 0) | |
183 | return 0; | |
184 | else | |
185 | /* Failed */ | |
186 | return -1; | |
187 | } | |
188 | ||
189 | /* Return the current thread's priority. */ | |
190 | static inline int | |
191 | __gthread_objc_thread_get_priority(void) | |
192 | { | |
193 | int sys_priority; | |
194 | ||
195 | if (__gthread_active_p ()) | |
196 | { | |
197 | if ((sys_priority = pthread_getprio(pthread_self())) >= 0) | |
198 | { | |
199 | if (sys_priority >= PRI_FG_MIN_NP | |
200 | && sys_priority <= PRI_FG_MAX_NP) | |
201 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
202 | if (sys_priority >= PRI_BG_MIN_NP | |
203 | && sys_priority <= PRI_BG_MAX_NP) | |
204 | return OBJC_THREAD_BACKGROUND_PRIORITY; | |
205 | return OBJC_THREAD_LOW_PRIORITY; | |
206 | } | |
207 | ||
208 | /* Failed */ | |
209 | return -1; | |
210 | } | |
211 | else | |
212 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
213 | } | |
214 | ||
215 | /* Yield our process time to another thread. */ | |
216 | static inline void | |
217 | __gthread_objc_thread_yield(void) | |
218 | { | |
219 | if (__gthread_active_p ()) | |
220 | pthread_yield(); | |
221 | } | |
222 | ||
223 | /* Terminate the current thread. */ | |
224 | static inline int | |
225 | __gthread_objc_thread_exit(void) | |
226 | { | |
227 | if (__gthread_active_p ()) | |
228 | /* exit the thread */ | |
229 | pthread_exit(&__objc_thread_exit_status); | |
230 | ||
231 | /* Failed if we reached here */ | |
232 | return -1; | |
233 | } | |
234 | ||
235 | /* Returns an integer value which uniquely describes a thread. */ | |
236 | static inline objc_thread_t | |
237 | __gthread_objc_thread_id(void) | |
238 | { | |
239 | if (__gthread_active_p ()) | |
240 | { | |
241 | pthread_t self = pthread_self(); | |
242 | ||
243 | return (objc_thread_t) pthread_getunique_np (&self); | |
244 | } | |
245 | else | |
246 | return (objc_thread_t)1; | |
247 | } | |
248 | ||
249 | /* Sets the thread's local storage pointer. */ | |
250 | static inline int | |
251 | __gthread_objc_thread_set_data(void *value) | |
252 | { | |
253 | if (__gthread_active_p ()) | |
254 | return pthread_setspecific(_objc_thread_storage, value); | |
255 | else | |
256 | { | |
257 | thread_local_storage = value; | |
258 | return 0; | |
259 | } | |
260 | } | |
261 | ||
262 | /* Returns the thread's local storage pointer. */ | |
263 | static inline void * | |
264 | __gthread_objc_thread_get_data(void) | |
265 | { | |
266 | void *value = NULL; | |
267 | ||
268 | if (__gthread_active_p ()) | |
269 | { | |
270 | if ( !(pthread_getspecific(_objc_thread_storage, &value)) ) | |
271 | return value; | |
272 | ||
273 | return NULL; | |
274 | } | |
275 | else | |
276 | return thread_local_storage; | |
277 | } | |
278 | ||
279 | /* Backend mutex functions */ | |
280 | ||
281 | /* Allocate a mutex. */ | |
282 | static inline int | |
283 | __gthread_objc_mutex_allocate(objc_mutex_t mutex) | |
284 | { | |
802a8181 DA |
285 | if (__gthread_active_p ()) |
286 | { | |
287 | mutex->backend = objc_malloc(sizeof(pthread_mutex_t)); | |
288 | ||
289 | if (pthread_mutex_init((pthread_mutex_t *)mutex->backend, | |
15794a95 | 290 | pthread_mutexattr_default)) |
802a8181 DA |
291 | { |
292 | objc_free(mutex->backend); | |
293 | mutex->backend = NULL; | |
294 | return -1; | |
295 | } | |
296 | } | |
15794a95 L |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
301 | /* Deallocate a mutex. */ | |
302 | static inline int | |
303 | __gthread_objc_mutex_deallocate(objc_mutex_t mutex) | |
304 | { | |
6bb92770 DA |
305 | if (__gthread_active_p ()) |
306 | { | |
307 | if (pthread_mutex_destroy((pthread_mutex_t *)mutex->backend)) | |
308 | return -1; | |
309 | ||
310 | objc_free(mutex->backend); | |
311 | mutex->backend = NULL; | |
312 | } | |
15794a95 L |
313 | |
314 | return 0; | |
315 | } | |
316 | ||
317 | /* Grab a lock on a mutex. */ | |
318 | static inline int | |
319 | __gthread_objc_mutex_lock(objc_mutex_t mutex) | |
320 | { | |
321 | if (__gthread_active_p ()) | |
322 | return pthread_mutex_lock((pthread_mutex_t *)mutex->backend); | |
323 | else | |
324 | return 0; | |
325 | } | |
326 | ||
327 | /* Try to grab a lock on a mutex. */ | |
328 | static inline int | |
329 | __gthread_objc_mutex_trylock(objc_mutex_t mutex) | |
330 | { | |
331 | if (__gthread_active_p () | |
332 | && pthread_mutex_trylock((pthread_mutex_t *)mutex->backend) != 1) | |
333 | return -1; | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | /* Unlock the mutex */ | |
339 | static inline int | |
340 | __gthread_objc_mutex_unlock(objc_mutex_t mutex) | |
341 | { | |
342 | if (__gthread_active_p ()) | |
343 | return pthread_mutex_unlock((pthread_mutex_t *)mutex->backend); | |
344 | else | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /* Backend condition mutex functions */ | |
349 | ||
350 | /* Allocate a condition. */ | |
351 | static inline int | |
352 | __gthread_objc_condition_allocate(objc_condition_t condition) | |
353 | { | |
c54dbf8b | 354 | if (__gthread_active_p ()) |
15794a95 L |
355 | /* Unimplemented. */ |
356 | return -1; | |
357 | else | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* Deallocate a condition. */ | |
362 | static inline int | |
363 | __gthread_objc_condition_deallocate(objc_condition_t condition) | |
364 | { | |
365 | if (__gthread_active_p ()) | |
366 | /* Unimplemented. */ | |
367 | return -1; | |
368 | else | |
369 | return 0; | |
370 | } | |
371 | ||
372 | /* Wait on the condition */ | |
373 | static inline int | |
374 | __gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex) | |
375 | { | |
376 | if (__gthread_active_p ()) | |
377 | /* Unimplemented. */ | |
378 | return -1; | |
379 | else | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* Wake up all threads waiting on this condition. */ | |
384 | static inline int | |
385 | __gthread_objc_condition_broadcast(objc_condition_t condition) | |
386 | { | |
387 | if (__gthread_active_p ()) | |
388 | /* Unimplemented. */ | |
389 | return -1; | |
390 | else | |
391 | return 0; | |
392 | } | |
393 | ||
394 | /* Wake up one thread waiting on this condition. */ | |
395 | static inline int | |
396 | __gthread_objc_condition_signal(objc_condition_t condition) | |
397 | { | |
398 | if (__gthread_active_p ()) | |
399 | /* Unimplemented. */ | |
400 | return -1; | |
401 | else | |
402 | return 0; | |
403 | } | |
404 | ||
405 | #else /* _LIBOBJC */ | |
406 | ||
f24af81b | 407 | static inline int |
d1e51320 | 408 | __gthread_once (__gthread_once_t *once, void (*func) (void)) |
f24af81b TT |
409 | { |
410 | if (__gthread_active_p ()) | |
411 | return pthread_once (once, func); | |
412 | else | |
413 | return -1; | |
414 | } | |
415 | ||
416 | static inline int | |
417 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) | |
418 | { | |
419 | return pthread_keycreate (key, dtor); | |
420 | } | |
421 | ||
422 | static inline int | |
5467baef | 423 | __gthread_key_dtor (UNUSED (__gthread_key_t key), UNUSED (void *ptr)) |
f24af81b TT |
424 | { |
425 | /* Nothing needed. */ | |
426 | return 0; | |
427 | } | |
428 | ||
5467baef JDA |
429 | static inline int |
430 | __gthread_key_delete (UNUSED (__gthread_key_t key)) | |
431 | { | |
432 | /* Operation is not supported. */ | |
433 | return -1; | |
434 | } | |
f24af81b TT |
435 | |
436 | static inline void * | |
437 | __gthread_getspecific (__gthread_key_t key) | |
438 | { | |
439 | void *ptr; | |
440 | if (pthread_getspecific (key, &ptr) == 0) | |
441 | return ptr; | |
442 | else | |
443 | return 0; | |
444 | } | |
445 | ||
446 | static inline int | |
447 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
448 | { | |
449 | return pthread_setspecific (key, (void *) ptr); | |
450 | } | |
451 | ||
5241c227 JDA |
452 | static inline void |
453 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
454 | { | |
455 | if (__gthread_active_p ()) | |
456 | pthread_mutex_init (mutex, pthread_mutexattr_default); | |
457 | } | |
458 | ||
f24af81b TT |
459 | static inline int |
460 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
461 | { | |
462 | if (__gthread_active_p ()) | |
463 | return pthread_mutex_lock (mutex); | |
464 | else | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static inline int | |
469 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
470 | { | |
471 | if (__gthread_active_p ()) | |
472 | return pthread_mutex_trylock (mutex); | |
473 | else | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static inline int | |
478 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
479 | { | |
480 | if (__gthread_active_p ()) | |
481 | return pthread_mutex_unlock (mutex); | |
482 | else | |
483 | return 0; | |
484 | } | |
485 | ||
15794a95 L |
486 | #endif /* _LIBOBJC */ |
487 | ||
5467baef JDA |
488 | #undef UNUSED |
489 | ||
88657302 | 490 | #endif /* ! GCC_GTHR_DCE_H */ |