]>
Commit | Line | Data |
---|---|---|
6319d58e | 1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
471528fc | 2 | /* Compile this one with gcc. */ |
04641143 | 3 | /* Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc. |
471528fc | 4 | Contributed by Mumit Khan <khan@xraylith.wisc.edu>. |
5 | ||
f12b58b3 | 6 | This file is part of GCC. |
471528fc | 7 | |
f12b58b3 | 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. | |
471528fc | 12 | |
f12b58b3 | 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. | |
471528fc | 17 | |
18 | You should have received a copy of the GNU General Public License | |
f12b58b3 | 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. */ | |
471528fc | 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 | ||
2a281353 | 30 | #ifndef GCC_GTHR_WIN32_H |
31 | #define GCC_GTHR_WIN32_H | |
471528fc | 32 | |
33 | /* Windows32 threads specific definitions. The windows32 threading model | |
3cfec666 | 34 | does not map well into pthread-inspired gcc's threading model, and so |
471528fc | 35 | there are caveats one needs to be aware of. |
36 | ||
c13f265c | 37 | 1. The destructor supplied to __gthread_key_create is ignored for |
3cfec666 | 38 | generic x86-win32 ports. This will certainly cause memory leaks |
39 | due to unreclaimed eh contexts (sizeof (eh_context) is at least | |
c13f265c | 40 | 24 bytes for x86 currently). |
471528fc | 41 | |
42 | This memory leak may be significant for long-running applications | |
43 | that make heavy use of C++ EH. | |
44 | ||
c13f265c | 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 | |
3cfec666 | 50 | DLL, which results in memory leak. Other x86-win32 ports can use |
c13f265c | 51 | the same technique of course to avoid the leak. |
52 | ||
471528fc | 53 | 2. The error codes returned are non-POSIX like, and cast into ints. |
3cfec666 | 54 | This may cause incorrect error return due to truncation values on |
471528fc | 55 | hw where sizeof (DWORD) > sizeof (int). |
3cfec666 | 56 | |
57 | 3. We might consider using Critical Sections instead of Windows32 | |
58 | mutexes for better performance, but emulating __gthread_mutex_trylock | |
c13f265c | 59 | interface becomes more complicated (Win9x does not support |
60 | TryEnterCriticalSectioni, while NT does). | |
3cfec666 | 61 | |
c13f265c | 62 | The basic framework should work well enough. In the long term, GCC |
63 | needs to use Structured Exception Handling on Windows32. */ | |
471528fc | 64 | |
65 | #define __GTHREADS 1 | |
66 | ||
81189303 | 67 | #include <errno.h> |
68 | #ifdef __MINGW32__ | |
69 | #include <_mingw.h> | |
70 | #endif | |
6319d58e | 71 | |
72 | #ifdef _LIBOBJC | |
73 | ||
61dcce9c | 74 | /* This is necessary to prevent windef.h (included from windows.h) from |
3cfec666 | 75 | defining it's own BOOL as a typedef. */ |
61dcce9c | 76 | #ifndef __OBJC__ |
77 | #define __OBJC__ | |
78 | #endif | |
79 | #include <windows.h> | |
3cfec666 | 80 | /* Now undef the windows BOOL. */ |
61dcce9c | 81 | #undef BOOL |
82 | ||
6319d58e | 83 | /* Key structure for maintaining thread specific storage */ |
0160b241 | 84 | static DWORD __gthread_objc_data_tls = (DWORD) -1; |
6319d58e | 85 | |
86 | /* Backend initialization functions */ | |
87 | ||
5a54c45e | 88 | /* Initialize the threads subsystem. */ |
6319d58e | 89 | int |
0160b241 | 90 | __gthread_objc_init_thread_system (void) |
6319d58e | 91 | { |
92 | /* Initialize the thread storage key */ | |
0160b241 | 93 | if ((__gthread_objc_data_tls = TlsAlloc ()) != (DWORD) -1) |
6319d58e | 94 | return 0; |
95 | else | |
96 | return -1; | |
97 | } | |
98 | ||
5a54c45e | 99 | /* Close the threads subsystem. */ |
6319d58e | 100 | int |
0160b241 | 101 | __gthread_objc_close_thread_system (void) |
6319d58e | 102 | { |
0160b241 | 103 | if (__gthread_objc_data_tls != (DWORD) -1) |
104 | TlsFree (__gthread_objc_data_tls); | |
6319d58e | 105 | return 0; |
106 | } | |
107 | ||
108 | /* Backend thread functions */ | |
109 | ||
5a54c45e | 110 | /* Create a new thread of execution. */ |
6319d58e | 111 | objc_thread_t |
0160b241 | 112 | __gthread_objc_thread_detach (void (*func)(void *arg), void *arg) |
6319d58e | 113 | { |
114 | DWORD thread_id = 0; | |
115 | HANDLE win32_handle; | |
116 | ||
0160b241 | 117 | if (!(win32_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) func, |
118 | arg, 0, &thread_id))) | |
6319d58e | 119 | thread_id = 0; |
3cfec666 | 120 | |
0160b241 | 121 | return (objc_thread_t) thread_id; |
6319d58e | 122 | } |
123 | ||
5a54c45e | 124 | /* Set the current thread's priority. */ |
6319d58e | 125 | int |
0160b241 | 126 | __gthread_objc_thread_set_priority (int priority) |
6319d58e | 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 */ | |
0160b241 | 145 | if (SetThreadPriority (GetCurrentThread (), sys_priority)) |
6319d58e | 146 | return 0; |
147 | else | |
148 | return -1; | |
149 | } | |
150 | ||
5a54c45e | 151 | /* Return the current thread's priority. */ |
6319d58e | 152 | int |
0160b241 | 153 | __gthread_objc_thread_get_priority (void) |
6319d58e | 154 | { |
155 | int sys_priority; | |
156 | ||
0160b241 | 157 | sys_priority = GetThreadPriority (GetCurrentThread ()); |
3cfec666 | 158 | |
6319d58e | 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; | |
3cfec666 | 170 | |
6319d58e | 171 | case THREAD_PRIORITY_IDLE: |
172 | case THREAD_PRIORITY_LOWEST: | |
173 | return OBJC_THREAD_LOW_PRIORITY; | |
174 | } | |
175 | ||
5a54c45e | 176 | /* Couldn't get priority. */ |
6319d58e | 177 | return -1; |
178 | } | |
179 | ||
5a54c45e | 180 | /* Yield our process time to another thread. */ |
6319d58e | 181 | void |
0160b241 | 182 | __gthread_objc_thread_yield (void) |
6319d58e | 183 | { |
0160b241 | 184 | Sleep (0); |
6319d58e | 185 | } |
186 | ||
5a54c45e | 187 | /* Terminate the current thread. */ |
6319d58e | 188 | int |
0160b241 | 189 | __gthread_objc_thread_exit (void) |
6319d58e | 190 | { |
191 | /* exit the thread */ | |
0160b241 | 192 | ExitThread (__objc_thread_exit_status); |
6319d58e | 193 | |
194 | /* Failed if we reached here */ | |
195 | return -1; | |
196 | } | |
197 | ||
5a54c45e | 198 | /* Returns an integer value which uniquely describes a thread. */ |
6319d58e | 199 | objc_thread_t |
0160b241 | 200 | __gthread_objc_thread_id (void) |
6319d58e | 201 | { |
0160b241 | 202 | return (objc_thread_t) GetCurrentThreadId (); |
6319d58e | 203 | } |
204 | ||
5a54c45e | 205 | /* Sets the thread's local storage pointer. */ |
6319d58e | 206 | int |
0160b241 | 207 | __gthread_objc_thread_set_data (void *value) |
6319d58e | 208 | { |
0160b241 | 209 | if (TlsSetValue (__gthread_objc_data_tls, value)) |
6319d58e | 210 | return 0; |
211 | else | |
212 | return -1; | |
213 | } | |
214 | ||
5a54c45e | 215 | /* Returns the thread's local storage pointer. */ |
6319d58e | 216 | void * |
0160b241 | 217 | __gthread_objc_thread_get_data (void) |
6319d58e | 218 | { |
bc7da7ad | 219 | DWORD lasterror; |
220 | void *ptr; | |
221 | ||
0160b241 | 222 | lasterror = GetLastError (); |
bc7da7ad | 223 | |
0160b241 | 224 | ptr = TlsGetValue (__gthread_objc_data_tls); /* Return thread data. */ |
bc7da7ad | 225 | |
0160b241 | 226 | SetLastError (lasterror); |
bc7da7ad | 227 | |
228 | return ptr; | |
6319d58e | 229 | } |
230 | ||
231 | /* Backend mutex functions */ | |
232 | ||
5a54c45e | 233 | /* Allocate a mutex. */ |
6319d58e | 234 | int |
0160b241 | 235 | __gthread_objc_mutex_allocate (objc_mutex_t mutex) |
6319d58e | 236 | { |
0160b241 | 237 | if ((mutex->backend = (void *) CreateMutex (NULL, 0, NULL)) == NULL) |
6319d58e | 238 | return -1; |
239 | else | |
240 | return 0; | |
241 | } | |
242 | ||
5a54c45e | 243 | /* Deallocate a mutex. */ |
6319d58e | 244 | int |
0160b241 | 245 | __gthread_objc_mutex_deallocate (objc_mutex_t mutex) |
6319d58e | 246 | { |
0160b241 | 247 | CloseHandle ((HANDLE) (mutex->backend)); |
6319d58e | 248 | return 0; |
249 | } | |
250 | ||
5a54c45e | 251 | /* Grab a lock on a mutex. */ |
6319d58e | 252 | int |
0160b241 | 253 | __gthread_objc_mutex_lock (objc_mutex_t mutex) |
6319d58e | 254 | { |
255 | int status; | |
256 | ||
0160b241 | 257 | status = WaitForSingleObject ((HANDLE) (mutex->backend), INFINITE); |
6319d58e | 258 | if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED) |
259 | return -1; | |
260 | else | |
261 | return 0; | |
262 | } | |
263 | ||
5a54c45e | 264 | /* Try to grab a lock on a mutex. */ |
6319d58e | 265 | int |
0160b241 | 266 | __gthread_objc_mutex_trylock (objc_mutex_t mutex) |
6319d58e | 267 | { |
268 | int status; | |
269 | ||
0160b241 | 270 | status = WaitForSingleObject ((HANDLE) (mutex->backend), 0); |
6319d58e | 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 | |
0160b241 | 279 | __gthread_objc_mutex_unlock (objc_mutex_t mutex) |
6319d58e | 280 | { |
0160b241 | 281 | if (ReleaseMutex ((HANDLE) (mutex->backend)) == 0) |
6319d58e | 282 | return -1; |
283 | else | |
284 | return 0; | |
285 | } | |
286 | ||
287 | /* Backend condition mutex functions */ | |
288 | ||
5a54c45e | 289 | /* Allocate a condition. */ |
6319d58e | 290 | int |
0160b241 | 291 | __gthread_objc_condition_allocate (objc_condition_t condition) |
6319d58e | 292 | { |
5a54c45e | 293 | /* Unimplemented. */ |
6319d58e | 294 | return -1; |
295 | } | |
296 | ||
5a54c45e | 297 | /* Deallocate a condition. */ |
6319d58e | 298 | int |
0160b241 | 299 | __gthread_objc_condition_deallocate (objc_condition_t condition) |
6319d58e | 300 | { |
5a54c45e | 301 | /* Unimplemented. */ |
6319d58e | 302 | return -1; |
303 | } | |
304 | ||
305 | /* Wait on the condition */ | |
306 | int | |
0160b241 | 307 | __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) |
6319d58e | 308 | { |
5a54c45e | 309 | /* Unimplemented. */ |
6319d58e | 310 | return -1; |
311 | } | |
312 | ||
5a54c45e | 313 | /* Wake up all threads waiting on this condition. */ |
6319d58e | 314 | int |
0160b241 | 315 | __gthread_objc_condition_broadcast (objc_condition_t condition) |
6319d58e | 316 | { |
5a54c45e | 317 | /* Unimplemented. */ |
6319d58e | 318 | return -1; |
319 | } | |
320 | ||
5a54c45e | 321 | /* Wake up one thread waiting on this condition. */ |
6319d58e | 322 | int |
0160b241 | 323 | __gthread_objc_condition_signal (objc_condition_t condition) |
6319d58e | 324 | { |
5a54c45e | 325 | /* Unimplemented. */ |
6319d58e | 326 | return -1; |
327 | } | |
328 | ||
329 | #else /* _LIBOBJC */ | |
330 | ||
29dcbe46 | 331 | #ifdef __cplusplus |
332 | extern "C" { | |
333 | #endif | |
471528fc | 334 | |
29dcbe46 | 335 | typedef unsigned long __gthread_key_t; |
471528fc | 336 | |
337 | typedef struct { | |
338 | int done; | |
339 | long started; | |
340 | } __gthread_once_t; | |
341 | ||
29dcbe46 | 342 | typedef void* __gthread_mutex_t; |
471528fc | 343 | |
29dcbe46 | 344 | #define __GTHREAD_ONCE_INIT {0, -1} |
471528fc | 345 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
b8dd27f3 | 346 | #define __GTHREAD_MUTEX_INIT_DEFAULT 0 |
471528fc | 347 | |
c13f265c | 348 | #if __MINGW32_MAJOR_VERSION >= 1 || \ |
349 | (__MINGW32_MAJOR_VERSION == 0 && __MINGW32_MINOR_VERSION > 2) | |
350 | #define MINGW32_SUPPORTS_MT_EH 1 | |
6ef828f9 | 351 | /* Mingw runtime >= v0.3 provides a magic variable that is set to nonzero |
3cfec666 | 352 | if -mthreads option was specified, or 0 otherwise. This is to get around |
c13f265c | 353 | the lack of weak symbols in PE-COFF. */ |
354 | extern int _CRT_MT; | |
29dcbe46 | 355 | extern int __mingwthr_key_dtor (unsigned long, void (*) (void *)); |
356 | #endif /* __MINGW32__ version */ | |
c13f265c | 357 | |
471528fc | 358 | static inline int |
205b5771 | 359 | __gthread_active_p (void) |
471528fc | 360 | { |
c13f265c | 361 | #ifdef MINGW32_SUPPORTS_MT_EH |
362 | return _CRT_MT; | |
363 | #else | |
471528fc | 364 | return 1; |
c13f265c | 365 | #endif |
471528fc | 366 | } |
367 | ||
29dcbe46 | 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 | { | |
0160b241 | 387 | if (__gthread_active_p ()) |
29dcbe46 | 388 | return __gthr_win32_once (once, func); |
389 | else | |
0160b241 | 390 | return -1; |
29dcbe46 | 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 | ||
0160b241 | 399 | static inline int |
29dcbe46 | 400 | __gthread_key_delete (__gthread_key_t key) |
401 | { | |
0160b241 | 402 | return __gthr_win32_key_delete (key); |
29dcbe46 | 403 | } |
404 | ||
405 | static inline void * | |
406 | __gthread_getspecific (__gthread_key_t key) | |
407 | { | |
408 | return __gthr_win32_getspecific (key); | |
409 | } | |
410 | ||
411 | static inline int | |
412 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
413 | { | |
414 | return __gthr_win32_setspecific (key, ptr); | |
415 | } | |
416 | ||
417 | static inline void | |
418 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
419 | { | |
420 | __gthr_win32_mutex_init_function (mutex); | |
421 | } | |
422 | ||
423 | static inline int | |
424 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
425 | { | |
426 | if (__gthread_active_p ()) | |
427 | return __gthr_win32_mutex_lock (mutex); | |
428 | else | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static inline int | |
433 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
434 | { | |
435 | if (__gthread_active_p ()) | |
436 | return __gthr_win32_mutex_trylock (mutex); | |
437 | else | |
0160b241 | 438 | return 0; |
29dcbe46 | 439 | } |
440 | ||
441 | static inline int | |
442 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
443 | { | |
444 | if (__gthread_active_p ()) | |
445 | return __gthr_win32_mutex_unlock (mutex); | |
446 | else | |
0160b241 | 447 | return 0; |
29dcbe46 | 448 | } |
449 | ||
450 | #else /* ! __GTHREAD_HIDE_WIN32API */ | |
451 | ||
452 | #include <windows.h> | |
453 | #include <errno.h> | |
454 | ||
471528fc | 455 | static inline int |
205b5771 | 456 | __gthread_once (__gthread_once_t *once, void (*func) (void)) |
471528fc | 457 | { |
458 | if (! __gthread_active_p ()) | |
459 | return -1; | |
460 | else if (once == NULL || func == NULL) | |
461 | return EINVAL; | |
462 | ||
463 | if (! once->done) | |
464 | { | |
465 | if (InterlockedIncrement (&(once->started)) == 0) | |
3cfec666 | 466 | { |
471528fc | 467 | (*func) (); |
468 | once->done = TRUE; | |
469 | } | |
c13f265c | 470 | else |
471 | { | |
3cfec666 | 472 | /* Another thread is currently executing the code, so wait for it |
473 | to finish; yield the CPU in the meantime. If performance | |
474 | does become an issue, the solution is to use an Event that | |
475 | we wait on here (and set above), but that implies a place to | |
476 | create the event before this routine is called. */ | |
c13f265c | 477 | while (! once->done) |
478 | Sleep (0); | |
479 | } | |
471528fc | 480 | } |
3cfec666 | 481 | |
471528fc | 482 | return 0; |
483 | } | |
484 | ||
c13f265c | 485 | /* Windows32 thread local keys don't support destructors; this leads to |
3cfec666 | 486 | leaks, especially in threaded applications making extensive use of |
c13f265c | 487 | C++ EH. Mingw uses a thread-support DLL to work-around this problem. */ |
471528fc | 488 | static inline int |
c13f265c | 489 | __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) |
471528fc | 490 | { |
491 | int status = 0; | |
492 | DWORD tls_index = TlsAlloc (); | |
493 | if (tls_index != 0xFFFFFFFF) | |
c13f265c | 494 | { |
495 | *key = tls_index; | |
496 | #ifdef MINGW32_SUPPORTS_MT_EH | |
497 | /* Mingw runtime will run the dtors in reverse order for each thread | |
498 | when the thread exits. */ | |
499 | status = __mingwthr_key_dtor (*key, dtor); | |
500 | #endif | |
501 | } | |
471528fc | 502 | else |
503 | status = (int) GetLastError (); | |
504 | return status; | |
505 | } | |
506 | ||
471528fc | 507 | static inline int |
508 | __gthread_key_delete (__gthread_key_t key) | |
509 | { | |
510 | return (TlsFree (key) != 0) ? 0 : (int) GetLastError (); | |
511 | } | |
512 | ||
513 | static inline void * | |
514 | __gthread_getspecific (__gthread_key_t key) | |
515 | { | |
bc7da7ad | 516 | DWORD lasterror; |
517 | void *ptr; | |
518 | ||
0160b241 | 519 | lasterror = GetLastError (); |
bc7da7ad | 520 | |
0160b241 | 521 | ptr = TlsGetValue (key); |
bc7da7ad | 522 | |
0160b241 | 523 | SetLastError (lasterror); |
bc7da7ad | 524 | |
525 | return ptr; | |
471528fc | 526 | } |
527 | ||
528 | static inline int | |
529 | __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
530 | { | |
c13f265c | 531 | return (TlsSetValue (key, (void*) ptr) != 0) ? 0 : (int) GetLastError (); |
471528fc | 532 | } |
533 | ||
534 | static inline void | |
535 | __gthread_mutex_init_function (__gthread_mutex_t *mutex) | |
536 | { | |
3cfec666 | 537 | /* Create unnamed mutex with default security attr and no initial owner. */ |
471528fc | 538 | *mutex = CreateMutex (NULL, 0, NULL); |
539 | } | |
540 | ||
541 | static inline int | |
542 | __gthread_mutex_lock (__gthread_mutex_t *mutex) | |
543 | { | |
544 | int status = 0; | |
545 | ||
546 | if (__gthread_active_p ()) | |
547 | { | |
548 | if (WaitForSingleObject (*mutex, INFINITE) == WAIT_OBJECT_0) | |
549 | status = 0; | |
550 | else | |
551 | status = 1; | |
552 | } | |
553 | return status; | |
554 | } | |
555 | ||
556 | static inline int | |
557 | __gthread_mutex_trylock (__gthread_mutex_t *mutex) | |
558 | { | |
559 | int status = 0; | |
560 | ||
561 | if (__gthread_active_p ()) | |
562 | { | |
563 | if (WaitForSingleObject (*mutex, 0) == WAIT_OBJECT_0) | |
564 | status = 0; | |
565 | else | |
566 | status = 1; | |
567 | } | |
568 | return status; | |
569 | } | |
570 | ||
571 | static inline int | |
572 | __gthread_mutex_unlock (__gthread_mutex_t *mutex) | |
573 | { | |
574 | if (__gthread_active_p ()) | |
575 | return (ReleaseMutex (*mutex) != 0) ? 0 : 1; | |
576 | else | |
577 | return 0; | |
578 | } | |
579 | ||
29dcbe46 | 580 | #endif /* __GTHREAD_HIDE_WIN32API */ |
581 | ||
582 | #ifdef __cplusplus | |
583 | } | |
584 | #endif | |
585 | ||
6319d58e | 586 | #endif /* _LIBOBJC */ |
587 | ||
2a281353 | 588 | #endif /* ! GCC_GTHR_WIN32_H */ |