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15794a95 | 1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
f24af81b | 2 | /* Compile this one with gcc. */ |
279b5b3c | 3 | /* Copyright (C) 1997, 1999, 2000, 2004 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_SOLARIS_H |
30 | #define GCC_GTHR_SOLARIS_H | |
f24af81b TT |
31 | |
32 | /* Solaris threads as found in Solaris 2.[456]. | |
33 | Actually these are Unix International (UI) threads, but I don't | |
71287280 | 34 | know if anyone else implements these. */ |
f24af81b TT |
35 | |
36 | #define __GTHREADS 1 | |
37 | ||
38 | #include <thread.h> | |
39 | #include <errno.h> | |
40 | ||
41 | typedef thread_key_t __gthread_key_t; | |
e6179f45 | 42 | typedef struct { |
f24af81b TT |
43 | mutex_t mutex; |
44 | int once; | |
45 | } __gthread_once_t; | |
46 | typedef mutex_t __gthread_mutex_t; | |
40aac948 | 47 | typedef mutex_t __gthread_recursive_mutex_t; |
f24af81b TT |
48 | |
49 | #define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 } | |
50 | #define __GTHREAD_MUTEX_INIT DEFAULTMUTEX | |
40aac948 | 51 | #define __GTHREAD_RECURSIVE_MUTEX_INIT RECURSIVE_ERRORCHECKMUTEX |
f24af81b TT |
52 | |
53 | #if SUPPORTS_WEAK && GTHREAD_USE_WEAK | |
54 | ||
55 | #pragma weak thr_keycreate | |
56 | #pragma weak thr_getspecific | |
57 | #pragma weak thr_setspecific | |
58 | #pragma weak thr_create | |
59 | ||
60 | #pragma weak mutex_lock | |
61 | #pragma weak mutex_trylock | |
62 | #pragma weak mutex_unlock | |
63 | ||
15794a95 L |
64 | #ifdef _LIBOBJC |
65 | #pragma weak thr_exit | |
66 | #pragma weak thr_keycreate | |
67 | #pragma weak thr_getprio | |
68 | #pragma weak thr_self | |
69 | #pragma weak thr_setprio | |
70 | #pragma weak thr_yield | |
71 | ||
72 | #pragma weak cond_init | |
73 | #pragma weak cond_destroy | |
74 | #pragma weak cond_wait | |
75 | #pragma weak cond_broadcast | |
76 | #pragma weak cond_signal | |
77 | ||
78 | #pragma weak mutex_init | |
79 | #pragma weak mutex_destroy | |
80 | #endif | |
81 | ||
f24af81b | 82 | /* This will not actually work in Solaris 2.5, since libc contains |
71287280 | 83 | dummy symbols of all thr_* routines. */ |
f24af81b | 84 | |
f24af81b | 85 | static inline int |
d1e51320 | 86 | __gthread_active_p (void) |
f24af81b | 87 | { |
7a8de19b | 88 | static void *const __gthread_active_ptr = (void *) &thr_create; |
f24af81b TT |
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 thread_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 | ||
71287280 | 112 | /* Initialize the threads subsystem. */ |
15794a95 | 113 | static inline int |
e6179f45 | 114 | __gthread_objc_init_thread_system (void) |
15794a95 | 115 | { |
ea4b7848 | 116 | /* Initialize the thread storage key. */ |
15794a95 | 117 | if (__gthread_active_p () |
e6179f45 | 118 | && thr_keycreate (&_objc_thread_storage, NULL) == 0) |
15794a95 L |
119 | return 0; |
120 | ||
121 | return -1; | |
122 | } | |
123 | ||
71287280 | 124 | /* Close the threads subsystem. */ |
15794a95 | 125 | static inline int |
e6179f45 | 126 | __gthread_objc_close_thread_system (void) |
15794a95 L |
127 | { |
128 | if (__gthread_active_p ()) | |
129 | return 0; | |
130 | else | |
131 | return -1; | |
132 | } | |
133 | ||
134 | /* Backend thread functions */ | |
135 | ||
71287280 | 136 | /* Create a new thread of execution. */ |
15794a95 | 137 | static inline objc_thread_t |
e6179f45 | 138 | __gthread_objc_thread_detach (void (*func)(void *), void *arg) |
15794a95 L |
139 | { |
140 | objc_thread_t thread_id; | |
141 | thread_t new_thread_id = 0; | |
142 | ||
143 | if (!__gthread_active_p ()) | |
144 | return NULL; | |
589005ff | 145 | |
e6179f45 KH |
146 | if (thr_create (NULL, 0, (void *) func, arg, |
147 | THR_DETACHED | THR_NEW_LWP, | |
148 | &new_thread_id) == 0) | |
149 | thread_id = *(objc_thread_t *) &new_thread_id; | |
15794a95 L |
150 | else |
151 | thread_id = NULL; | |
589005ff | 152 | |
15794a95 L |
153 | return thread_id; |
154 | } | |
155 | ||
71287280 | 156 | /* Set the current thread's priority. */ |
15794a95 | 157 | static inline int |
e6179f45 | 158 | __gthread_objc_thread_set_priority (int priority) |
15794a95 L |
159 | { |
160 | int sys_priority = 0; | |
161 | ||
162 | if (!__gthread_active_p ()) | |
163 | return -1; | |
164 | ||
165 | switch (priority) | |
166 | { | |
167 | case OBJC_THREAD_INTERACTIVE_PRIORITY: | |
168 | sys_priority = 300; | |
169 | break; | |
170 | default: | |
171 | case OBJC_THREAD_BACKGROUND_PRIORITY: | |
172 | sys_priority = 200; | |
173 | break; | |
174 | case OBJC_THREAD_LOW_PRIORITY: | |
175 | sys_priority = 1000; | |
176 | break; | |
177 | } | |
178 | ||
179 | /* Change priority */ | |
e6179f45 | 180 | if (thr_setprio (thr_self (), sys_priority) == 0) |
15794a95 L |
181 | return 0; |
182 | else | |
183 | return -1; | |
184 | } | |
185 | ||
71287280 | 186 | /* Return the current thread's priority. */ |
15794a95 | 187 | static inline int |
e6179f45 | 188 | __gthread_objc_thread_get_priority (void) |
15794a95 L |
189 | { |
190 | int sys_priority; | |
191 | ||
192 | if (!__gthread_active_p ()) | |
193 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
589005ff | 194 | |
e6179f45 | 195 | if (thr_getprio (thr_self (), &sys_priority) == 0) |
15794a95 L |
196 | { |
197 | if (sys_priority >= 250) | |
198 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
199 | else if (sys_priority >= 150) | |
200 | return OBJC_THREAD_BACKGROUND_PRIORITY; | |
201 | return OBJC_THREAD_LOW_PRIORITY; | |
202 | } | |
203 | ||
71287280 | 204 | /* Couldn't get priority. */ |
15794a95 L |
205 | return -1; |
206 | } | |
207 | ||
71287280 | 208 | /* Yield our process time to another thread. */ |
15794a95 | 209 | static inline void |
e6179f45 | 210 | __gthread_objc_thread_yield (void) |
15794a95 L |
211 | { |
212 | if (__gthread_active_p ()) | |
e6179f45 | 213 | thr_yield (); |
15794a95 L |
214 | } |
215 | ||
71287280 | 216 | /* Terminate the current thread. */ |
15794a95 | 217 | static inline int |
e6179f45 | 218 | __gthread_objc_thread_exit (void) |
15794a95 L |
219 | { |
220 | if (__gthread_active_p ()) | |
221 | /* exit the thread */ | |
e6179f45 | 222 | thr_exit (&__objc_thread_exit_status); |
15794a95 L |
223 | |
224 | /* Failed if we reached here */ | |
225 | return -1; | |
226 | } | |
227 | ||
71287280 | 228 | /* Returns an integer value which uniquely describes a thread. */ |
15794a95 | 229 | static inline objc_thread_t |
e6179f45 | 230 | __gthread_objc_thread_id (void) |
15794a95 L |
231 | { |
232 | if (__gthread_active_p ()) | |
e6179f45 | 233 | return (objc_thread_t) thr_self (); |
15794a95 | 234 | else |
e6179f45 | 235 | return (objc_thread_t) 1; |
15794a95 L |
236 | } |
237 | ||
71287280 | 238 | /* Sets the thread's local storage pointer. */ |
15794a95 | 239 | static inline int |
e6179f45 | 240 | __gthread_objc_thread_set_data (void *value) |
15794a95 L |
241 | { |
242 | if (__gthread_active_p ()) | |
243 | { | |
e6179f45 | 244 | if (thr_setspecific (_objc_thread_storage, value) == 0) |
15794a95 L |
245 | return 0; |
246 | else | |
247 | return -1; | |
248 | } | |
249 | else | |
250 | { | |
251 | thread_local_storage = value; | |
252 | return 0; | |
253 | } | |
254 | } | |
255 | ||
71287280 | 256 | /* Returns the thread's local storage pointer. */ |
15794a95 | 257 | static inline void * |
e6179f45 | 258 | __gthread_objc_thread_get_data (void) |
15794a95 L |
259 | { |
260 | void *value = NULL; | |
261 | ||
262 | if (__gthread_active_p ()) | |
263 | { | |
e6179f45 | 264 | if (thr_getspecific (_objc_thread_storage, &value) == 0) |
15794a95 L |
265 | return value; |
266 | else | |
267 | return NULL; | |
268 | } | |
269 | else | |
270 | return thread_local_storage; | |
271 | } | |
272 | ||
273 | /* Backend mutex functions */ | |
274 | ||
71287280 | 275 | /* Allocate a mutex. */ |
15794a95 | 276 | static inline int |
e6179f45 | 277 | __gthread_objc_mutex_allocate (objc_mutex_t mutex) |
15794a95 L |
278 | { |
279 | if (__gthread_active_p () | |
e6179f45 | 280 | && mutex_init ((mutex_t *) (&(mutex->backend)), USYNC_THREAD, 0)) |
15794a95 L |
281 | return -1; |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
71287280 | 286 | /* Deallocate a mutex. */ |
15794a95 | 287 | static inline int |
e6179f45 | 288 | __gthread_objc_mutex_deallocate (objc_mutex_t mutex) |
15794a95 L |
289 | { |
290 | if (__gthread_active_p ()) | |
e6179f45 | 291 | mutex_destroy ((mutex_t *) (&(mutex->backend))); |
15794a95 L |
292 | |
293 | return 0; | |
294 | } | |
295 | ||
71287280 | 296 | /* Grab a lock on a mutex. */ |
15794a95 | 297 | static inline int |
e6179f45 | 298 | __gthread_objc_mutex_lock (objc_mutex_t mutex) |
15794a95 L |
299 | { |
300 | if (__gthread_active_p () | |
e6179f45 | 301 | && mutex_lock ((mutex_t *) (&(mutex->backend))) != 0) |
15794a95 L |
302 | return -1; |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
71287280 | 307 | /* Try to grab a lock on a mutex. */ |
15794a95 | 308 | static inline int |
e6179f45 | 309 | __gthread_objc_mutex_trylock (objc_mutex_t mutex) |
15794a95 L |
310 | { |
311 | if (__gthread_active_p () | |
e6179f45 | 312 | && mutex_trylock ((mutex_t *) (&(mutex->backend))) != 0) |
15794a95 L |
313 | return -1; |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | /* Unlock the mutex */ | |
319 | static inline int | |
e6179f45 | 320 | __gthread_objc_mutex_unlock (objc_mutex_t mutex) |
15794a95 L |
321 | { |
322 | if (__gthread_active_p () | |
e6179f45 | 323 | && mutex_unlock ((mutex_t *) (&(mutex->backend))) != 0) |
15794a95 L |
324 | return -1; |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | /* Backend condition mutex functions */ | |
330 | ||
71287280 | 331 | /* Allocate a condition. */ |
15794a95 | 332 | static inline int |
e6179f45 | 333 | __gthread_objc_condition_allocate (objc_condition_t condition) |
15794a95 L |
334 | { |
335 | if (__gthread_active_p ()) | |
e6179f45 KH |
336 | return cond_init ((cond_t *) (&(condition->backend)), USYNC_THREAD, |
337 | NULL); | |
15794a95 L |
338 | else |
339 | return 0; | |
340 | } | |
341 | ||
71287280 | 342 | /* Deallocate a condition. */ |
15794a95 | 343 | static inline int |
e6179f45 | 344 | __gthread_objc_condition_deallocate (objc_condition_t condition) |
15794a95 L |
345 | { |
346 | if (__gthread_active_p ()) | |
e6179f45 | 347 | return cond_destroy ((cond_t *) (&(condition->backend))); |
15794a95 L |
348 | else |
349 | return 0; | |
350 | } | |
351 | ||
352 | /* Wait on the condition */ | |
353 | static inline int | |
e6179f45 | 354 | __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) |
15794a95 L |
355 | { |
356 | if (__gthread_active_p ()) | |
e6179f45 KH |
357 | return cond_wait ((cond_t *) (&(condition->backend)), |
358 | (mutex_t *) (&(mutex->backend))); | |
15794a95 L |
359 | else |
360 | return 0; | |
361 | } | |
362 | ||
71287280 | 363 | /* Wake up all threads waiting on this condition. */ |
15794a95 | 364 | static inline int |
e6179f45 | 365 | __gthread_objc_condition_broadcast (objc_condition_t condition) |
15794a95 L |
366 | { |
367 | if (__gthread_active_p ()) | |
e6179f45 | 368 | return cond_broadcast ((cond_t *) (&(condition->backend))); |
15794a95 L |
369 | else |
370 | return 0; | |
371 | } | |
372 | ||
71287280 | 373 | /* Wake up one thread waiting on this condition. */ |
15794a95 | 374 | static inline int |
e6179f45 | 375 | __gthread_objc_condition_signal (objc_condition_t condition) |
15794a95 L |
376 | { |
377 | if (__gthread_active_p ()) | |
e6179f45 | 378 | return cond_signal ((cond_t *) (&(condition->backend))); |
15794a95 L |
379 | else |
380 | return 0; | |
381 | } | |
382 | ||
383 | #else /* _LIBOBJC */ | |
384 | ||
f24af81b | 385 | static inline int |
d1e51320 | 386 | __gthread_once (__gthread_once_t *once, void (*func) (void)) |
f24af81b TT |
387 | { |
388 | if (! __gthread_active_p ()) | |
389 | return -1; | |
390 | ||
391 | if (once == 0 || func == 0) | |
754d1a92 | 392 | return EINVAL; |
f24af81b TT |
393 | |
394 | if (once->once == 0) | |
395 | { | |
754d1a92 TT |
396 | int status = mutex_lock (&once->mutex); |
397 | if (status != 0) | |
398 | return status; | |
f24af81b TT |
399 | if (once->once == 0) |
400 | { | |
401 | (*func) (); | |
e6179f45 | 402 | once->once++; |
f24af81b TT |
403 | } |
404 | mutex_unlock (&once->mutex); | |
405 | } | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static inline int | |
410 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) | |
411 | { | |
412 | /* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually | |
71287280 | 413 | got a reasonable key value, and if not, fail. */ |
f24af81b | 414 | *key = -1; |
754d1a92 | 415 | if (thr_keycreate (key, dtor) != 0 || *key == -1) |
f24af81b TT |
416 | return -1; |
417 | else | |
418 | return 0; | |
419 | } | |
420 | ||
f24af81b TT |
421 | static inline int |
422 | __gthread_key_delete (__gthread_key_t key) | |
423 | { | |
71287280 | 424 | /* Not possible. */ |
f24af81b TT |
425 | return -1; |
426 | } | |
427 | ||
428 | static inline void * | |
429 | __gthread_getspecific (__gthread_key_t key) | |
430 | { | |
431 | void *ptr; | |
432 | if (thr_getspecific (key, &ptr) == 0) | |
433 | return ptr; | |
434 | else | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static inline int | |
439 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
440 | { | |
441 | return thr_setspecific (key, (void *) ptr); | |
442 | } | |
443 | ||
444 | static inline int | |
445 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
446 | { | |
447 | if (__gthread_active_p ()) | |
448 | return mutex_lock (mutex); | |
449 | else | |
450 | return 0; | |
451 | } | |
452 | ||
453 | static inline int | |
454 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
455 | { | |
456 | if (__gthread_active_p ()) | |
457 | return mutex_trylock (mutex); | |
458 | else | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static inline int | |
463 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
464 | { | |
465 | if (__gthread_active_p ()) | |
466 | return mutex_unlock (mutex); | |
467 | else | |
468 | return 0; | |
469 | } | |
470 | ||
40aac948 JM |
471 | static inline int |
472 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) | |
473 | { | |
474 | return __gthread_mutex_lock (mutex); | |
475 | } | |
476 | ||
477 | static inline int | |
478 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) | |
479 | { | |
480 | return __gthread_mutex_trylock (mutex); | |
481 | } | |
482 | ||
483 | static inline int | |
484 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) | |
485 | { | |
486 | return __gthread_mutex_unlock (mutex); | |
487 | } | |
488 | ||
15794a95 L |
489 | #endif /* _LIBOBJC */ |
490 | ||
88657302 | 491 | #endif /* ! GCC_GTHR_SOLARIS_H */ |