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15794a95 | 1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
62dafdeb | 2 | /* Compile this one with gcc. */ |
3ef42a0c | 3 | /* Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc. |
62dafdeb MK |
4 | Contributed by Mumit Khan <khan@xraylith.wisc.edu>. |
5 | ||
1322177d | 6 | This file is part of GCC. |
62dafdeb | 7 | |
1322177d LB |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
62dafdeb | 12 | |
1322177d LB |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
62dafdeb MK |
17 | |
18 | You should have received a copy of the GNU General Public License | |
1322177d LB |
19 | along with GCC; see the file COPYING. If not, write to the Free |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
62dafdeb MK |
22 | |
23 | /* As a special exception, if you link this library with other files, | |
24 | some of which are compiled with GCC, to produce an executable, | |
25 | this library does not by itself cause the resulting executable | |
26 | to be covered by the GNU General Public License. | |
27 | This exception does not however invalidate any other reasons why | |
28 | the executable file might be covered by the GNU General Public License. */ | |
29 | ||
88657302 RH |
30 | #ifndef GCC_GTHR_WIN32_H |
31 | #define GCC_GTHR_WIN32_H | |
62dafdeb MK |
32 | |
33 | /* Windows32 threads specific definitions. The windows32 threading model | |
589005ff | 34 | does not map well into pthread-inspired gcc's threading model, and so |
62dafdeb MK |
35 | there are caveats one needs to be aware of. |
36 | ||
f22a97d2 | 37 | 1. The destructor supplied to __gthread_key_create is ignored for |
589005ff KH |
38 | generic x86-win32 ports. This will certainly cause memory leaks |
39 | due to unreclaimed eh contexts (sizeof (eh_context) is at least | |
f22a97d2 | 40 | 24 bytes for x86 currently). |
62dafdeb MK |
41 | |
42 | This memory leak may be significant for long-running applications | |
43 | that make heavy use of C++ EH. | |
44 | ||
f22a97d2 MK |
45 | However, Mingw runtime (version 0.3 or newer) provides a mechanism |
46 | to emulate pthreads key dtors; the runtime provides a special DLL, | |
47 | linked in if -mthreads option is specified, that runs the dtors in | |
48 | the reverse order of registration when each thread exits. If | |
49 | -mthreads option is not given, a stub is linked in instead of the | |
589005ff | 50 | DLL, which results in memory leak. Other x86-win32 ports can use |
f22a97d2 MK |
51 | the same technique of course to avoid the leak. |
52 | ||
62dafdeb | 53 | 2. The error codes returned are non-POSIX like, and cast into ints. |
589005ff | 54 | This may cause incorrect error return due to truncation values on |
62dafdeb | 55 | hw where sizeof (DWORD) > sizeof (int). |
589005ff KH |
56 | |
57 | 3. We might consider using Critical Sections instead of Windows32 | |
58 | mutexes for better performance, but emulating __gthread_mutex_trylock | |
f22a97d2 MK |
59 | interface becomes more complicated (Win9x does not support |
60 | TryEnterCriticalSectioni, while NT does). | |
589005ff | 61 | |
f22a97d2 MK |
62 | The basic framework should work well enough. In the long term, GCC |
63 | needs to use Structured Exception Handling on Windows32. */ | |
62dafdeb MK |
64 | |
65 | #define __GTHREADS 1 | |
66 | ||
5dab7f92 TP |
67 | #include <errno.h> |
68 | #ifdef __MINGW32__ | |
69 | #include <_mingw.h> | |
70 | #endif | |
15794a95 L |
71 | |
72 | #ifdef _LIBOBJC | |
73 | ||
3b56934f | 74 | /* This is necessary to prevent windef.h (included from windows.h) from |
589005ff | 75 | defining it's own BOOL as a typedef. */ |
3b56934f CF |
76 | #ifndef __OBJC__ |
77 | #define __OBJC__ | |
78 | #endif | |
79 | #include <windows.h> | |
589005ff | 80 | /* Now undef the windows BOOL. */ |
3b56934f CF |
81 | #undef BOOL |
82 | ||
15794a95 L |
83 | /* Key structure for maintaining thread specific storage */ |
84 | static DWORD __gthread_objc_data_tls = (DWORD)-1; | |
85 | ||
86 | /* Backend initialization functions */ | |
87 | ||
71287280 | 88 | /* Initialize the threads subsystem. */ |
15794a95 L |
89 | int |
90 | __gthread_objc_init_thread_system(void) | |
91 | { | |
92 | /* Initialize the thread storage key */ | |
93 | if ((__gthread_objc_data_tls = TlsAlloc()) != (DWORD)-1) | |
94 | return 0; | |
95 | else | |
96 | return -1; | |
97 | } | |
98 | ||
71287280 | 99 | /* Close the threads subsystem. */ |
15794a95 L |
100 | int |
101 | __gthread_objc_close_thread_system(void) | |
102 | { | |
103 | if (__gthread_objc_data_tls != (DWORD)-1) | |
104 | TlsFree(__gthread_objc_data_tls); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | /* Backend thread functions */ | |
109 | ||
71287280 | 110 | /* Create a new thread of execution. */ |
15794a95 L |
111 | objc_thread_t |
112 | __gthread_objc_thread_detach(void (*func)(void *arg), void *arg) | |
113 | { | |
114 | DWORD thread_id = 0; | |
115 | HANDLE win32_handle; | |
116 | ||
117 | if (!(win32_handle = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)func, | |
589005ff | 118 | arg, 0, &thread_id))) |
15794a95 | 119 | thread_id = 0; |
589005ff | 120 | |
15794a95 L |
121 | return (objc_thread_t)thread_id; |
122 | } | |
123 | ||
71287280 | 124 | /* Set the current thread's priority. */ |
15794a95 L |
125 | int |
126 | __gthread_objc_thread_set_priority(int priority) | |
127 | { | |
128 | int sys_priority = 0; | |
129 | ||
130 | switch (priority) | |
131 | { | |
132 | case OBJC_THREAD_INTERACTIVE_PRIORITY: | |
133 | sys_priority = THREAD_PRIORITY_NORMAL; | |
134 | break; | |
135 | default: | |
136 | case OBJC_THREAD_BACKGROUND_PRIORITY: | |
137 | sys_priority = THREAD_PRIORITY_BELOW_NORMAL; | |
138 | break; | |
139 | case OBJC_THREAD_LOW_PRIORITY: | |
140 | sys_priority = THREAD_PRIORITY_LOWEST; | |
141 | break; | |
142 | } | |
143 | ||
144 | /* Change priority */ | |
145 | if (SetThreadPriority(GetCurrentThread(), sys_priority)) | |
146 | return 0; | |
147 | else | |
148 | return -1; | |
149 | } | |
150 | ||
71287280 | 151 | /* Return the current thread's priority. */ |
15794a95 L |
152 | int |
153 | __gthread_objc_thread_get_priority(void) | |
154 | { | |
155 | int sys_priority; | |
156 | ||
157 | sys_priority = GetThreadPriority(GetCurrentThread()); | |
589005ff | 158 | |
15794a95 L |
159 | switch (sys_priority) |
160 | { | |
161 | case THREAD_PRIORITY_HIGHEST: | |
162 | case THREAD_PRIORITY_TIME_CRITICAL: | |
163 | case THREAD_PRIORITY_ABOVE_NORMAL: | |
164 | case THREAD_PRIORITY_NORMAL: | |
165 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
166 | ||
167 | default: | |
168 | case THREAD_PRIORITY_BELOW_NORMAL: | |
169 | return OBJC_THREAD_BACKGROUND_PRIORITY; | |
589005ff | 170 | |
15794a95 L |
171 | case THREAD_PRIORITY_IDLE: |
172 | case THREAD_PRIORITY_LOWEST: | |
173 | return OBJC_THREAD_LOW_PRIORITY; | |
174 | } | |
175 | ||
71287280 | 176 | /* Couldn't get priority. */ |
15794a95 L |
177 | return -1; |
178 | } | |
179 | ||
71287280 | 180 | /* Yield our process time to another thread. */ |
15794a95 L |
181 | void |
182 | __gthread_objc_thread_yield(void) | |
183 | { | |
184 | Sleep(0); | |
185 | } | |
186 | ||
71287280 | 187 | /* Terminate the current thread. */ |
15794a95 L |
188 | int |
189 | __gthread_objc_thread_exit(void) | |
190 | { | |
191 | /* exit the thread */ | |
39244792 | 192 | ExitThread(__objc_thread_exit_status); |
15794a95 L |
193 | |
194 | /* Failed if we reached here */ | |
195 | return -1; | |
196 | } | |
197 | ||
71287280 | 198 | /* Returns an integer value which uniquely describes a thread. */ |
15794a95 L |
199 | objc_thread_t |
200 | __gthread_objc_thread_id(void) | |
201 | { | |
202 | return (objc_thread_t)GetCurrentThreadId(); | |
203 | } | |
204 | ||
71287280 | 205 | /* Sets the thread's local storage pointer. */ |
15794a95 L |
206 | int |
207 | __gthread_objc_thread_set_data(void *value) | |
208 | { | |
209 | if (TlsSetValue(__gthread_objc_data_tls, value)) | |
210 | return 0; | |
211 | else | |
212 | return -1; | |
213 | } | |
214 | ||
71287280 | 215 | /* Returns the thread's local storage pointer. */ |
15794a95 L |
216 | void * |
217 | __gthread_objc_thread_get_data(void) | |
218 | { | |
69e905c8 TP |
219 | DWORD lasterror; |
220 | void *ptr; | |
221 | ||
222 | lasterror = GetLastError(); | |
223 | ||
3ef42a0c | 224 | ptr = TlsGetValue(__gthread_objc_data_tls); /* Return thread data. */ |
69e905c8 TP |
225 | |
226 | SetLastError( lasterror ); | |
227 | ||
228 | return ptr; | |
15794a95 L |
229 | } |
230 | ||
231 | /* Backend mutex functions */ | |
232 | ||
71287280 | 233 | /* Allocate a mutex. */ |
15794a95 L |
234 | int |
235 | __gthread_objc_mutex_allocate(objc_mutex_t mutex) | |
236 | { | |
237 | if ((mutex->backend = (void *)CreateMutex(NULL, 0, NULL)) == NULL) | |
238 | return -1; | |
239 | else | |
240 | return 0; | |
241 | } | |
242 | ||
71287280 | 243 | /* Deallocate a mutex. */ |
15794a95 L |
244 | int |
245 | __gthread_objc_mutex_deallocate(objc_mutex_t mutex) | |
246 | { | |
247 | CloseHandle((HANDLE)(mutex->backend)); | |
248 | return 0; | |
249 | } | |
250 | ||
71287280 | 251 | /* Grab a lock on a mutex. */ |
15794a95 L |
252 | int |
253 | __gthread_objc_mutex_lock(objc_mutex_t mutex) | |
254 | { | |
255 | int status; | |
256 | ||
257 | status = WaitForSingleObject((HANDLE)(mutex->backend), INFINITE); | |
258 | if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED) | |
259 | return -1; | |
260 | else | |
261 | return 0; | |
262 | } | |
263 | ||
71287280 | 264 | /* Try to grab a lock on a mutex. */ |
15794a95 L |
265 | int |
266 | __gthread_objc_mutex_trylock(objc_mutex_t mutex) | |
267 | { | |
268 | int status; | |
269 | ||
270 | status = WaitForSingleObject((HANDLE)(mutex->backend), 0); | |
271 | if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED) | |
272 | return -1; | |
273 | else | |
274 | return 0; | |
275 | } | |
276 | ||
277 | /* Unlock the mutex */ | |
278 | int | |
279 | __gthread_objc_mutex_unlock(objc_mutex_t mutex) | |
280 | { | |
281 | if (ReleaseMutex((HANDLE)(mutex->backend)) == 0) | |
282 | return -1; | |
283 | else | |
284 | return 0; | |
285 | } | |
286 | ||
287 | /* Backend condition mutex functions */ | |
288 | ||
71287280 | 289 | /* Allocate a condition. */ |
15794a95 L |
290 | int |
291 | __gthread_objc_condition_allocate(objc_condition_t condition) | |
292 | { | |
71287280 | 293 | /* Unimplemented. */ |
15794a95 L |
294 | return -1; |
295 | } | |
296 | ||
71287280 | 297 | /* Deallocate a condition. */ |
15794a95 L |
298 | int |
299 | __gthread_objc_condition_deallocate(objc_condition_t condition) | |
300 | { | |
71287280 | 301 | /* Unimplemented. */ |
15794a95 L |
302 | return -1; |
303 | } | |
304 | ||
305 | /* Wait on the condition */ | |
306 | int | |
307 | __gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex) | |
308 | { | |
71287280 | 309 | /* Unimplemented. */ |
15794a95 L |
310 | return -1; |
311 | } | |
312 | ||
71287280 | 313 | /* Wake up all threads waiting on this condition. */ |
15794a95 L |
314 | int |
315 | __gthread_objc_condition_broadcast(objc_condition_t condition) | |
316 | { | |
71287280 | 317 | /* Unimplemented. */ |
15794a95 L |
318 | return -1; |
319 | } | |
320 | ||
71287280 | 321 | /* Wake up one thread waiting on this condition. */ |
15794a95 L |
322 | int |
323 | __gthread_objc_condition_signal(objc_condition_t condition) | |
324 | { | |
71287280 | 325 | /* Unimplemented. */ |
15794a95 L |
326 | return -1; |
327 | } | |
328 | ||
329 | #else /* _LIBOBJC */ | |
330 | ||
b25bb36a DS |
331 | #ifdef __cplusplus |
332 | extern "C" { | |
333 | #endif | |
62dafdeb | 334 | |
b25bb36a | 335 | typedef unsigned long __gthread_key_t; |
62dafdeb MK |
336 | |
337 | typedef struct { | |
338 | int done; | |
339 | long started; | |
340 | } __gthread_once_t; | |
341 | ||
b25bb36a | 342 | typedef void* __gthread_mutex_t; |
62dafdeb | 343 | |
b25bb36a | 344 | #define __GTHREAD_ONCE_INIT {0, -1} |
62dafdeb | 345 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
3020a4b2 | 346 | #define __GTHREAD_MUTEX_INIT_DEFAULT 0 |
62dafdeb | 347 | |
f22a97d2 MK |
348 | #if __MINGW32_MAJOR_VERSION >= 1 || \ |
349 | (__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2) | |
350 | #define MINGW32_SUPPORTS_MT_EH 1 | |
f22a97d2 | 351 | /* Mingw runtime >= v0.3 provides a magic variable that is set to non-zero |
589005ff | 352 | if -mthreads option was specified, or 0 otherwise. This is to get around |
f22a97d2 MK |
353 | the lack of weak symbols in PE-COFF. */ |
354 | extern int _CRT_MT; | |
b25bb36a DS |
355 | extern int __mingwthr_key_dtor (unsigned long, void (*) (void *)); |
356 | #endif /* __MINGW32__ version */ | |
f22a97d2 | 357 | |
62dafdeb | 358 | static inline int |
d1e51320 | 359 | __gthread_active_p (void) |
62dafdeb | 360 | { |
f22a97d2 MK |
361 | #ifdef MINGW32_SUPPORTS_MT_EH |
362 | return _CRT_MT; | |
363 | #else | |
62dafdeb | 364 | return 1; |
f22a97d2 | 365 | #endif |
62dafdeb MK |
366 | } |
367 | ||
b25bb36a DS |
368 | #ifdef __GTHREAD_HIDE_WIN32API |
369 | ||
370 | /* The implementations are in config/i386/gthr-win32.c in libgcc.a. | |
371 | Only stubs are exposed to avoid polluting the C++ namespace with | |
372 | windows api definitions. */ | |
373 | ||
374 | extern int __gthr_win32_once (__gthread_once_t *, void (*) (void)); | |
375 | extern int __gthr_win32_key_create (__gthread_key_t *, void (*) (void*)); | |
376 | extern int __gthr_win32_key_delete (__gthread_key_t); | |
377 | extern void * __gthr_win32_getspecific (__gthread_key_t); | |
378 | extern int __gthr_win32_setspecific (__gthread_key_t, const void *); | |
379 | extern void __gthr_win32_mutex_init_function (__gthread_mutex_t *); | |
380 | extern int __gthr_win32_mutex_lock (__gthread_mutex_t *); | |
381 | extern int __gthr_win32_mutex_trylock (__gthread_mutex_t *); | |
382 | extern int __gthr_win32_mutex_unlock (__gthread_mutex_t *); | |
383 | ||
384 | static inline int | |
385 | __gthread_once (__gthread_once_t *once, void (*func) (void)) | |
386 | { | |
387 | if ( __gthread_active_p ()) | |
388 | return __gthr_win32_once (once, func); | |
389 | else | |
390 | return -1; | |
391 | } | |
392 | ||
393 | static inline int | |
394 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) | |
395 | { | |
396 | return __gthr_win32_key_create (key, dtor); | |
397 | } | |
398 | ||
399 | static inline int | |
400 | __gthread_key_dtor (__gthread_key_t key, void *ptr) | |
401 | { | |
402 | /* Nothing needed. */ | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static inline int | |
407 | __gthread_key_delete (__gthread_key_t key) | |
408 | { | |
409 | return __gthr_win32_key_delete (key); | |
410 | } | |
411 | ||
412 | static inline void * | |
413 | __gthread_getspecific (__gthread_key_t key) | |
414 | { | |
415 | return __gthr_win32_getspecific (key); | |
416 | } | |
417 | ||
418 | static inline int | |
419 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
420 | { | |
421 | return __gthr_win32_setspecific (key, ptr); | |
422 | } | |
423 | ||
424 | static inline void | |
425 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
426 | { | |
427 | __gthr_win32_mutex_init_function (mutex); | |
428 | } | |
429 | ||
430 | static inline int | |
431 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
432 | { | |
433 | if (__gthread_active_p ()) | |
434 | return __gthr_win32_mutex_lock (mutex); | |
435 | else | |
436 | return 0; | |
437 | } | |
438 | ||
439 | static inline int | |
440 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
441 | { | |
442 | if (__gthread_active_p ()) | |
443 | return __gthr_win32_mutex_trylock (mutex); | |
444 | else | |
445 | return 0; | |
446 | } | |
447 | ||
448 | static inline int | |
449 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
450 | { | |
451 | if (__gthread_active_p ()) | |
452 | return __gthr_win32_mutex_unlock (mutex); | |
453 | else | |
454 | return 0; | |
455 | } | |
456 | ||
457 | #else /* ! __GTHREAD_HIDE_WIN32API */ | |
458 | ||
459 | #include <windows.h> | |
460 | #include <errno.h> | |
461 | ||
62dafdeb | 462 | static inline int |
d1e51320 | 463 | __gthread_once (__gthread_once_t *once, void (*func) (void)) |
62dafdeb MK |
464 | { |
465 | if (! __gthread_active_p ()) | |
466 | return -1; | |
467 | else if (once == NULL || func == NULL) | |
468 | return EINVAL; | |
469 | ||
470 | if (! once->done) | |
471 | { | |
472 | if (InterlockedIncrement (&(once->started)) == 0) | |
589005ff | 473 | { |
62dafdeb MK |
474 | (*func) (); |
475 | once->done = TRUE; | |
476 | } | |
f22a97d2 MK |
477 | else |
478 | { | |
589005ff KH |
479 | /* Another thread is currently executing the code, so wait for it |
480 | to finish; yield the CPU in the meantime. If performance | |
481 | does become an issue, the solution is to use an Event that | |
482 | we wait on here (and set above), but that implies a place to | |
483 | create the event before this routine is called. */ | |
f22a97d2 MK |
484 | while (! once->done) |
485 | Sleep (0); | |
486 | } | |
62dafdeb | 487 | } |
589005ff | 488 | |
62dafdeb MK |
489 | return 0; |
490 | } | |
491 | ||
f22a97d2 | 492 | /* Windows32 thread local keys don't support destructors; this leads to |
589005ff | 493 | leaks, especially in threaded applications making extensive use of |
f22a97d2 | 494 | C++ EH. Mingw uses a thread-support DLL to work-around this problem. */ |
62dafdeb | 495 | static inline int |
f22a97d2 | 496 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) |
62dafdeb MK |
497 | { |
498 | int status = 0; | |
499 | DWORD tls_index = TlsAlloc (); | |
500 | if (tls_index != 0xFFFFFFFF) | |
f22a97d2 MK |
501 | { |
502 | *key = tls_index; | |
503 | #ifdef MINGW32_SUPPORTS_MT_EH | |
504 | /* Mingw runtime will run the dtors in reverse order for each thread | |
505 | when the thread exits. */ | |
506 | status = __mingwthr_key_dtor (*key, dtor); | |
507 | #endif | |
508 | } | |
62dafdeb MK |
509 | else |
510 | status = (int) GetLastError (); | |
511 | return status; | |
512 | } | |
513 | ||
f22a97d2 | 514 | /* Currently, this routine is called only for Mingw runtime, and if |
589005ff | 515 | -mthreads option is chosen to link in the thread support DLL. */ |
62dafdeb MK |
516 | static inline int |
517 | __gthread_key_dtor (__gthread_key_t key, void *ptr) | |
518 | { | |
71287280 | 519 | /* Nothing needed. */ |
f22a97d2 | 520 | return 0; |
62dafdeb MK |
521 | } |
522 | ||
62dafdeb MK |
523 | static inline int |
524 | __gthread_key_delete (__gthread_key_t key) | |
525 | { | |
526 | return (TlsFree (key) != 0) ? 0 : (int) GetLastError (); | |
527 | } | |
528 | ||
529 | static inline void * | |
530 | __gthread_getspecific (__gthread_key_t key) | |
531 | { | |
69e905c8 TP |
532 | DWORD lasterror; |
533 | void *ptr; | |
534 | ||
535 | lasterror = GetLastError(); | |
536 | ||
537 | ptr = TlsGetValue(key); | |
538 | ||
539 | SetLastError( lasterror ); | |
540 | ||
541 | return ptr; | |
62dafdeb MK |
542 | } |
543 | ||
544 | static inline int | |
545 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
546 | { | |
f22a97d2 | 547 | return (TlsSetValue (key, (void*) ptr) != 0) ? 0 : (int) GetLastError (); |
62dafdeb MK |
548 | } |
549 | ||
550 | static inline void | |
551 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
552 | { | |
589005ff | 553 | /* Create unnamed mutex with default security attr and no initial owner. */ |
62dafdeb MK |
554 | *mutex = CreateMutex (NULL, 0, NULL); |
555 | } | |
556 | ||
557 | static inline int | |
558 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
559 | { | |
560 | int status = 0; | |
561 | ||
562 | if (__gthread_active_p ()) | |
563 | { | |
564 | if (WaitForSingleObject (*mutex, INFINITE) == WAIT_OBJECT_0) | |
565 | status = 0; | |
566 | else | |
567 | status = 1; | |
568 | } | |
569 | return status; | |
570 | } | |
571 | ||
572 | static inline int | |
573 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
574 | { | |
575 | int status = 0; | |
576 | ||
577 | if (__gthread_active_p ()) | |
578 | { | |
579 | if (WaitForSingleObject (*mutex, 0) == WAIT_OBJECT_0) | |
580 | status = 0; | |
581 | else | |
582 | status = 1; | |
583 | } | |
584 | return status; | |
585 | } | |
586 | ||
587 | static inline int | |
588 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
589 | { | |
590 | if (__gthread_active_p ()) | |
591 | return (ReleaseMutex (*mutex) != 0) ? 0 : 1; | |
592 | else | |
593 | return 0; | |
594 | } | |
595 | ||
b25bb36a DS |
596 | #endif /* __GTHREAD_HIDE_WIN32API */ |
597 | ||
598 | #ifdef __cplusplus | |
599 | } | |
600 | #endif | |
601 | ||
15794a95 L |
602 | #endif /* _LIBOBJC */ |
603 | ||
88657302 | 604 | #endif /* ! GCC_GTHR_WIN32_H */ |