]>
Commit | Line | Data |
---|---|---|
15794a95 | 1 | /* Threads compatibility routines for libgcc2 and libobjc. */ |
62dafdeb | 2 | /* Compile this one with gcc. */ |
fe9565ed | 3 | |
5624e564 | 4 | /* Copyright (C) 1999-2015 Free Software Foundation, Inc. |
62dafdeb MK |
5 | Contributed by Mumit Khan <khan@xraylith.wisc.edu>. |
6 | ||
1322177d | 7 | This file is part of GCC. |
62dafdeb | 8 | |
1322177d LB |
9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
748086b7 | 11 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 12 | version. |
62dafdeb | 13 | |
1322177d LB |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
62dafdeb | 18 | |
748086b7 JJ |
19 | Under Section 7 of GPL version 3, you are granted additional |
20 | permissions described in the GCC Runtime Library Exception, version | |
21 | 3.1, as published by the Free Software Foundation. | |
22 | ||
23 | You should have received a copy of the GNU General Public License and | |
24 | a copy of the GCC Runtime Library Exception along with this program; | |
25 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
26 | <http://www.gnu.org/licenses/>. */ | |
62dafdeb | 27 | |
88657302 RH |
28 | #ifndef GCC_GTHR_WIN32_H |
29 | #define GCC_GTHR_WIN32_H | |
62dafdeb | 30 | |
fea16f81 DS |
31 | /* Make sure CONST_CAST2 (origin in system.h) is declared. */ |
32 | #ifndef CONST_CAST2 | |
33 | #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq) | |
34 | #endif | |
35 | ||
62dafdeb | 36 | /* Windows32 threads specific definitions. The windows32 threading model |
589005ff | 37 | does not map well into pthread-inspired gcc's threading model, and so |
62dafdeb MK |
38 | there are caveats one needs to be aware of. |
39 | ||
f22a97d2 | 40 | 1. The destructor supplied to __gthread_key_create is ignored for |
589005ff KH |
41 | generic x86-win32 ports. This will certainly cause memory leaks |
42 | due to unreclaimed eh contexts (sizeof (eh_context) is at least | |
f22a97d2 | 43 | 24 bytes for x86 currently). |
62dafdeb MK |
44 | |
45 | This memory leak may be significant for long-running applications | |
46 | that make heavy use of C++ EH. | |
47 | ||
f22a97d2 MK |
48 | However, Mingw runtime (version 0.3 or newer) provides a mechanism |
49 | to emulate pthreads key dtors; the runtime provides a special DLL, | |
50 | linked in if -mthreads option is specified, that runs the dtors in | |
51 | the reverse order of registration when each thread exits. If | |
52 | -mthreads option is not given, a stub is linked in instead of the | |
589005ff | 53 | DLL, which results in memory leak. Other x86-win32 ports can use |
f22a97d2 MK |
54 | the same technique of course to avoid the leak. |
55 | ||
62dafdeb | 56 | 2. The error codes returned are non-POSIX like, and cast into ints. |
589005ff | 57 | This may cause incorrect error return due to truncation values on |
62dafdeb | 58 | hw where sizeof (DWORD) > sizeof (int). |
589005ff | 59 | |
80408cac WY |
60 | 3. We are currently using a special mutex instead of the Critical |
61 | Sections, since Win9x does not support TryEnterCriticalSection | |
62 | (while NT does). | |
589005ff | 63 | |
f22a97d2 MK |
64 | The basic framework should work well enough. In the long term, GCC |
65 | needs to use Structured Exception Handling on Windows32. */ | |
62dafdeb MK |
66 | |
67 | #define __GTHREADS 1 | |
68 | ||
5dab7f92 TP |
69 | #include <errno.h> |
70 | #ifdef __MINGW32__ | |
71 | #include <_mingw.h> | |
72 | #endif | |
15794a95 | 73 | |
ce4a9de3 KT |
74 | #ifndef __UNUSED_PARAM |
75 | #define __UNUSED_PARAM(x) x | |
76 | #endif | |
77 | ||
15794a95 L |
78 | #ifdef _LIBOBJC |
79 | ||
3b56934f | 80 | /* This is necessary to prevent windef.h (included from windows.h) from |
f3b569ca | 81 | defining its own BOOL as a typedef. */ |
3b56934f CF |
82 | #ifndef __OBJC__ |
83 | #define __OBJC__ | |
84 | #endif | |
85 | #include <windows.h> | |
589005ff | 86 | /* Now undef the windows BOOL. */ |
3b56934f CF |
87 | #undef BOOL |
88 | ||
15794a95 | 89 | /* Key structure for maintaining thread specific storage */ |
fc98f5cb | 90 | static DWORD __gthread_objc_data_tls = (DWORD) -1; |
15794a95 L |
91 | |
92 | /* Backend initialization functions */ | |
93 | ||
71287280 | 94 | /* Initialize the threads subsystem. */ |
15794a95 | 95 | int |
fc98f5cb | 96 | __gthread_objc_init_thread_system (void) |
15794a95 | 97 | { |
ea4b7848 | 98 | /* Initialize the thread storage key. */ |
fc98f5cb | 99 | if ((__gthread_objc_data_tls = TlsAlloc ()) != (DWORD) -1) |
15794a95 L |
100 | return 0; |
101 | else | |
102 | return -1; | |
103 | } | |
104 | ||
71287280 | 105 | /* Close the threads subsystem. */ |
15794a95 | 106 | int |
fc98f5cb | 107 | __gthread_objc_close_thread_system (void) |
15794a95 | 108 | { |
fc98f5cb KH |
109 | if (__gthread_objc_data_tls != (DWORD) -1) |
110 | TlsFree (__gthread_objc_data_tls); | |
15794a95 L |
111 | return 0; |
112 | } | |
113 | ||
114 | /* Backend thread functions */ | |
115 | ||
71287280 | 116 | /* Create a new thread of execution. */ |
15794a95 | 117 | objc_thread_t |
fc98f5cb | 118 | __gthread_objc_thread_detach (void (*func)(void *arg), void *arg) |
15794a95 L |
119 | { |
120 | DWORD thread_id = 0; | |
121 | HANDLE win32_handle; | |
122 | ||
fc98f5cb KH |
123 | if (!(win32_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) func, |
124 | arg, 0, &thread_id))) | |
15794a95 | 125 | thread_id = 0; |
589005ff | 126 | |
ce4a9de3 | 127 | return (objc_thread_t) (INT_PTR) thread_id; |
15794a95 L |
128 | } |
129 | ||
71287280 | 130 | /* Set the current thread's priority. */ |
15794a95 | 131 | int |
fc98f5cb | 132 | __gthread_objc_thread_set_priority (int priority) |
15794a95 L |
133 | { |
134 | int sys_priority = 0; | |
135 | ||
136 | switch (priority) | |
137 | { | |
138 | case OBJC_THREAD_INTERACTIVE_PRIORITY: | |
139 | sys_priority = THREAD_PRIORITY_NORMAL; | |
140 | break; | |
141 | default: | |
142 | case OBJC_THREAD_BACKGROUND_PRIORITY: | |
143 | sys_priority = THREAD_PRIORITY_BELOW_NORMAL; | |
144 | break; | |
145 | case OBJC_THREAD_LOW_PRIORITY: | |
146 | sys_priority = THREAD_PRIORITY_LOWEST; | |
147 | break; | |
148 | } | |
149 | ||
150 | /* Change priority */ | |
fc98f5cb | 151 | if (SetThreadPriority (GetCurrentThread (), sys_priority)) |
15794a95 L |
152 | return 0; |
153 | else | |
154 | return -1; | |
155 | } | |
156 | ||
71287280 | 157 | /* Return the current thread's priority. */ |
15794a95 | 158 | int |
fc98f5cb | 159 | __gthread_objc_thread_get_priority (void) |
15794a95 L |
160 | { |
161 | int sys_priority; | |
162 | ||
fc98f5cb | 163 | sys_priority = GetThreadPriority (GetCurrentThread ()); |
589005ff | 164 | |
15794a95 L |
165 | switch (sys_priority) |
166 | { | |
167 | case THREAD_PRIORITY_HIGHEST: | |
168 | case THREAD_PRIORITY_TIME_CRITICAL: | |
169 | case THREAD_PRIORITY_ABOVE_NORMAL: | |
170 | case THREAD_PRIORITY_NORMAL: | |
171 | return OBJC_THREAD_INTERACTIVE_PRIORITY; | |
172 | ||
173 | default: | |
174 | case THREAD_PRIORITY_BELOW_NORMAL: | |
175 | return OBJC_THREAD_BACKGROUND_PRIORITY; | |
589005ff | 176 | |
15794a95 L |
177 | case THREAD_PRIORITY_IDLE: |
178 | case THREAD_PRIORITY_LOWEST: | |
179 | return OBJC_THREAD_LOW_PRIORITY; | |
180 | } | |
181 | ||
71287280 | 182 | /* Couldn't get priority. */ |
15794a95 L |
183 | return -1; |
184 | } | |
185 | ||
71287280 | 186 | /* Yield our process time to another thread. */ |
15794a95 | 187 | void |
fc98f5cb | 188 | __gthread_objc_thread_yield (void) |
15794a95 | 189 | { |
fc98f5cb | 190 | Sleep (0); |
15794a95 L |
191 | } |
192 | ||
71287280 | 193 | /* Terminate the current thread. */ |
15794a95 | 194 | int |
fc98f5cb | 195 | __gthread_objc_thread_exit (void) |
15794a95 L |
196 | { |
197 | /* exit the thread */ | |
fc98f5cb | 198 | ExitThread (__objc_thread_exit_status); |
15794a95 L |
199 | |
200 | /* Failed if we reached here */ | |
201 | return -1; | |
202 | } | |
203 | ||
71287280 | 204 | /* Returns an integer value which uniquely describes a thread. */ |
15794a95 | 205 | objc_thread_t |
fc98f5cb | 206 | __gthread_objc_thread_id (void) |
15794a95 | 207 | { |
ce4a9de3 | 208 | return (objc_thread_t) (INT_PTR) GetCurrentThreadId (); |
15794a95 L |
209 | } |
210 | ||
71287280 | 211 | /* Sets the thread's local storage pointer. */ |
15794a95 | 212 | int |
fc98f5cb | 213 | __gthread_objc_thread_set_data (void *value) |
15794a95 | 214 | { |
fc98f5cb | 215 | if (TlsSetValue (__gthread_objc_data_tls, value)) |
15794a95 L |
216 | return 0; |
217 | else | |
218 | return -1; | |
219 | } | |
220 | ||
71287280 | 221 | /* Returns the thread's local storage pointer. */ |
15794a95 | 222 | void * |
fc98f5cb | 223 | __gthread_objc_thread_get_data (void) |
15794a95 | 224 | { |
69e905c8 TP |
225 | DWORD lasterror; |
226 | void *ptr; | |
227 | ||
fc98f5cb | 228 | lasterror = GetLastError (); |
69e905c8 | 229 | |
fc98f5cb | 230 | ptr = TlsGetValue (__gthread_objc_data_tls); /* Return thread data. */ |
69e905c8 | 231 | |
fc98f5cb | 232 | SetLastError (lasterror); |
69e905c8 TP |
233 | |
234 | return ptr; | |
15794a95 L |
235 | } |
236 | ||
237 | /* Backend mutex functions */ | |
238 | ||
71287280 | 239 | /* Allocate a mutex. */ |
15794a95 | 240 | int |
fc98f5cb | 241 | __gthread_objc_mutex_allocate (objc_mutex_t mutex) |
15794a95 | 242 | { |
fc98f5cb | 243 | if ((mutex->backend = (void *) CreateMutex (NULL, 0, NULL)) == NULL) |
15794a95 L |
244 | return -1; |
245 | else | |
246 | return 0; | |
247 | } | |
248 | ||
71287280 | 249 | /* Deallocate a mutex. */ |
15794a95 | 250 | int |
fc98f5cb | 251 | __gthread_objc_mutex_deallocate (objc_mutex_t mutex) |
15794a95 | 252 | { |
fc98f5cb | 253 | CloseHandle ((HANDLE) (mutex->backend)); |
15794a95 L |
254 | return 0; |
255 | } | |
256 | ||
71287280 | 257 | /* Grab a lock on a mutex. */ |
15794a95 | 258 | int |
fc98f5cb | 259 | __gthread_objc_mutex_lock (objc_mutex_t mutex) |
15794a95 L |
260 | { |
261 | int status; | |
262 | ||
fc98f5cb | 263 | status = WaitForSingleObject ((HANDLE) (mutex->backend), INFINITE); |
15794a95 L |
264 | if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED) |
265 | return -1; | |
266 | else | |
267 | return 0; | |
268 | } | |
269 | ||
71287280 | 270 | /* Try to grab a lock on a mutex. */ |
15794a95 | 271 | int |
fc98f5cb | 272 | __gthread_objc_mutex_trylock (objc_mutex_t mutex) |
15794a95 L |
273 | { |
274 | int status; | |
275 | ||
fc98f5cb | 276 | status = WaitForSingleObject ((HANDLE) (mutex->backend), 0); |
15794a95 L |
277 | if (status != WAIT_OBJECT_0 && status != WAIT_ABANDONED) |
278 | return -1; | |
279 | else | |
280 | return 0; | |
281 | } | |
282 | ||
283 | /* Unlock the mutex */ | |
284 | int | |
fc98f5cb | 285 | __gthread_objc_mutex_unlock (objc_mutex_t mutex) |
15794a95 | 286 | { |
fc98f5cb | 287 | if (ReleaseMutex ((HANDLE) (mutex->backend)) == 0) |
15794a95 L |
288 | return -1; |
289 | else | |
290 | return 0; | |
291 | } | |
292 | ||
293 | /* Backend condition mutex functions */ | |
294 | ||
71287280 | 295 | /* Allocate a condition. */ |
15794a95 | 296 | int |
ce4a9de3 | 297 | __gthread_objc_condition_allocate (objc_condition_t __UNUSED_PARAM(condition)) |
15794a95 | 298 | { |
71287280 | 299 | /* Unimplemented. */ |
15794a95 L |
300 | return -1; |
301 | } | |
302 | ||
71287280 | 303 | /* Deallocate a condition. */ |
15794a95 | 304 | int |
ce4a9de3 | 305 | __gthread_objc_condition_deallocate (objc_condition_t __UNUSED_PARAM(condition)) |
15794a95 | 306 | { |
71287280 | 307 | /* Unimplemented. */ |
15794a95 L |
308 | return -1; |
309 | } | |
310 | ||
311 | /* Wait on the condition */ | |
312 | int | |
ce4a9de3 KT |
313 | __gthread_objc_condition_wait (objc_condition_t __UNUSED_PARAM(condition), |
314 | objc_mutex_t __UNUSED_PARAM(mutex)) | |
15794a95 | 315 | { |
71287280 | 316 | /* Unimplemented. */ |
15794a95 L |
317 | return -1; |
318 | } | |
319 | ||
71287280 | 320 | /* Wake up all threads waiting on this condition. */ |
15794a95 | 321 | int |
ce4a9de3 | 322 | __gthread_objc_condition_broadcast (objc_condition_t __UNUSED_PARAM(condition)) |
15794a95 | 323 | { |
71287280 | 324 | /* Unimplemented. */ |
15794a95 L |
325 | return -1; |
326 | } | |
327 | ||
71287280 | 328 | /* Wake up one thread waiting on this condition. */ |
15794a95 | 329 | int |
ce4a9de3 | 330 | __gthread_objc_condition_signal (objc_condition_t __UNUSED_PARAM(condition)) |
15794a95 | 331 | { |
71287280 | 332 | /* Unimplemented. */ |
15794a95 L |
333 | return -1; |
334 | } | |
335 | ||
336 | #else /* _LIBOBJC */ | |
337 | ||
b25bb36a DS |
338 | #ifdef __cplusplus |
339 | extern "C" { | |
340 | #endif | |
62dafdeb | 341 | |
b25bb36a | 342 | typedef unsigned long __gthread_key_t; |
62dafdeb MK |
343 | |
344 | typedef struct { | |
345 | int done; | |
346 | long started; | |
347 | } __gthread_once_t; | |
348 | ||
80408cac WY |
349 | typedef struct { |
350 | long counter; | |
351 | void *sema; | |
352 | } __gthread_mutex_t; | |
62dafdeb | 353 | |
40aac948 JM |
354 | typedef struct { |
355 | long counter; | |
356 | long depth; | |
40219f96 | 357 | unsigned long owner; |
40aac948 JM |
358 | void *sema; |
359 | } __gthread_recursive_mutex_t; | |
360 | ||
b25bb36a | 361 | #define __GTHREAD_ONCE_INIT {0, -1} |
62dafdeb | 362 | #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
42dfcf84 | 363 | #define __GTHREAD_MUTEX_INIT_DEFAULT {-1, 0} |
40219f96 WY |
364 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION \ |
365 | __gthread_recursive_mutex_init_function | |
366 | #define __GTHREAD_RECURSIVE_MUTEX_INIT_DEFAULT {-1, 0, 0, 0} | |
62dafdeb | 367 | |
a1bda0d7 | 368 | #if defined (_WIN32) && !defined(__CYGWIN__) |
f22a97d2 | 369 | #define MINGW32_SUPPORTS_MT_EH 1 |
cc2902df | 370 | /* Mingw runtime >= v0.3 provides a magic variable that is set to nonzero |
589005ff | 371 | if -mthreads option was specified, or 0 otherwise. This is to get around |
f22a97d2 MK |
372 | the lack of weak symbols in PE-COFF. */ |
373 | extern int _CRT_MT; | |
b25bb36a | 374 | extern int __mingwthr_key_dtor (unsigned long, void (*) (void *)); |
a1bda0d7 | 375 | #endif /* _WIN32 && !__CYGWIN__ */ |
f22a97d2 | 376 | |
42dfcf84 WY |
377 | /* The Windows95 kernel does not export InterlockedCompareExchange. |
378 | This provides a substitute. When building apps that reference | |
379 | gthread_mutex_try_lock, the __GTHREAD_I486_INLINE_LOCK_PRIMITIVES | |
380 | macro must be defined if Windows95 is a target. Currently | |
381 | gthread_mutex_try_lock is not referenced by libgcc or libstdc++. */ | |
382 | #ifdef __GTHREAD_I486_INLINE_LOCK_PRIMITIVES | |
383 | static inline long | |
09e361bb | 384 | __gthr_i486_lock_cmp_xchg(long *__dest, long __xchg, long __comperand) |
42dfcf84 WY |
385 | { |
386 | long result; | |
387 | __asm__ __volatile__ ("\n\ | |
388 | lock\n\ | |
389 | cmpxchg{l} {%4, %1|%1, %4}\n" | |
09e361bb JJ |
390 | : "=a" (result), "=m" (*__dest) |
391 | : "0" (__comperand), "m" (*__dest), "r" (__xchg) | |
42dfcf84 WY |
392 | : "cc"); |
393 | return result; | |
394 | } | |
395 | #define __GTHR_W32_InterlockedCompareExchange __gthr_i486_lock_cmp_xchg | |
396 | #else /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */ | |
397 | #define __GTHR_W32_InterlockedCompareExchange InterlockedCompareExchange | |
398 | #endif /* __GTHREAD_I486_INLINE_LOCK_PRIMITIVES */ | |
399 | ||
62dafdeb | 400 | static inline int |
d1e51320 | 401 | __gthread_active_p (void) |
62dafdeb | 402 | { |
f22a97d2 MK |
403 | #ifdef MINGW32_SUPPORTS_MT_EH |
404 | return _CRT_MT; | |
405 | #else | |
62dafdeb | 406 | return 1; |
f22a97d2 | 407 | #endif |
62dafdeb MK |
408 | } |
409 | ||
81888fcd | 410 | #if __GTHREAD_HIDE_WIN32API |
b25bb36a DS |
411 | |
412 | /* The implementations are in config/i386/gthr-win32.c in libgcc.a. | |
413 | Only stubs are exposed to avoid polluting the C++ namespace with | |
414 | windows api definitions. */ | |
415 | ||
416 | extern int __gthr_win32_once (__gthread_once_t *, void (*) (void)); | |
417 | extern int __gthr_win32_key_create (__gthread_key_t *, void (*) (void*)); | |
418 | extern int __gthr_win32_key_delete (__gthread_key_t); | |
419 | extern void * __gthr_win32_getspecific (__gthread_key_t); | |
420 | extern int __gthr_win32_setspecific (__gthread_key_t, const void *); | |
421 | extern void __gthr_win32_mutex_init_function (__gthread_mutex_t *); | |
422 | extern int __gthr_win32_mutex_lock (__gthread_mutex_t *); | |
423 | extern int __gthr_win32_mutex_trylock (__gthread_mutex_t *); | |
424 | extern int __gthr_win32_mutex_unlock (__gthread_mutex_t *); | |
40219f96 WY |
425 | extern void |
426 | __gthr_win32_recursive_mutex_init_function (__gthread_recursive_mutex_t *); | |
427 | extern int __gthr_win32_recursive_mutex_lock (__gthread_recursive_mutex_t *); | |
428 | extern int | |
429 | __gthr_win32_recursive_mutex_trylock (__gthread_recursive_mutex_t *); | |
430 | extern int __gthr_win32_recursive_mutex_unlock (__gthread_recursive_mutex_t *); | |
c262f705 | 431 | extern void __gthr_win32_mutex_destroy (__gthread_mutex_t *); |
1504e3e1 JW |
432 | extern int |
433 | __gthr_win32_recursive_mutex_destroy (__gthread_recursive_mutex_t *); | |
b25bb36a DS |
434 | |
435 | static inline int | |
09e361bb | 436 | __gthread_once (__gthread_once_t *__once, void (*__func) (void)) |
b25bb36a | 437 | { |
fc98f5cb | 438 | if (__gthread_active_p ()) |
09e361bb | 439 | return __gthr_win32_once (__once, __func); |
b25bb36a | 440 | else |
fc98f5cb | 441 | return -1; |
b25bb36a DS |
442 | } |
443 | ||
444 | static inline int | |
09e361bb | 445 | __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *)) |
b25bb36a | 446 | { |
09e361bb | 447 | return __gthr_win32_key_create (__key, __dtor); |
b25bb36a DS |
448 | } |
449 | ||
fc98f5cb | 450 | static inline int |
09e361bb | 451 | __gthread_key_delete (__gthread_key_t __key) |
b25bb36a | 452 | { |
09e361bb | 453 | return __gthr_win32_key_delete (__key); |
b25bb36a DS |
454 | } |
455 | ||
456 | static inline void * | |
09e361bb | 457 | __gthread_getspecific (__gthread_key_t __key) |
b25bb36a | 458 | { |
09e361bb | 459 | return __gthr_win32_getspecific (__key); |
b25bb36a DS |
460 | } |
461 | ||
462 | static inline int | |
09e361bb | 463 | __gthread_setspecific (__gthread_key_t __key, const void *__ptr) |
b25bb36a | 464 | { |
09e361bb | 465 | return __gthr_win32_setspecific (__key, __ptr); |
b25bb36a DS |
466 | } |
467 | ||
468 | static inline void | |
09e361bb | 469 | __gthread_mutex_init_function (__gthread_mutex_t *__mutex) |
b25bb36a | 470 | { |
09e361bb | 471 | __gthr_win32_mutex_init_function (__mutex); |
b25bb36a DS |
472 | } |
473 | ||
c262f705 | 474 | static inline void |
09e361bb | 475 | __gthread_mutex_destroy (__gthread_mutex_t *__mutex) |
c262f705 | 476 | { |
09e361bb | 477 | __gthr_win32_mutex_destroy (__mutex); |
c262f705 DS |
478 | } |
479 | ||
b25bb36a | 480 | static inline int |
09e361bb | 481 | __gthread_mutex_lock (__gthread_mutex_t *__mutex) |
b25bb36a DS |
482 | { |
483 | if (__gthread_active_p ()) | |
09e361bb | 484 | return __gthr_win32_mutex_lock (__mutex); |
b25bb36a DS |
485 | else |
486 | return 0; | |
487 | } | |
488 | ||
489 | static inline int | |
09e361bb | 490 | __gthread_mutex_trylock (__gthread_mutex_t *__mutex) |
b25bb36a DS |
491 | { |
492 | if (__gthread_active_p ()) | |
09e361bb | 493 | return __gthr_win32_mutex_trylock (__mutex); |
b25bb36a | 494 | else |
fc98f5cb | 495 | return 0; |
b25bb36a DS |
496 | } |
497 | ||
498 | static inline int | |
09e361bb | 499 | __gthread_mutex_unlock (__gthread_mutex_t *__mutex) |
b25bb36a DS |
500 | { |
501 | if (__gthread_active_p ()) | |
09e361bb | 502 | return __gthr_win32_mutex_unlock (__mutex); |
b25bb36a | 503 | else |
fc98f5cb | 504 | return 0; |
b25bb36a DS |
505 | } |
506 | ||
40219f96 | 507 | static inline void |
09e361bb | 508 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) |
40219f96 | 509 | { |
09e361bb | 510 | __gthr_win32_recursive_mutex_init_function (__mutex); |
40219f96 WY |
511 | } |
512 | ||
40aac948 | 513 | static inline int |
09e361bb | 514 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
515 | { |
516 | if (__gthread_active_p ()) | |
09e361bb | 517 | return __gthr_win32_recursive_mutex_lock (__mutex); |
40aac948 JM |
518 | else |
519 | return 0; | |
520 | } | |
521 | ||
522 | static inline int | |
09e361bb | 523 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
524 | { |
525 | if (__gthread_active_p ()) | |
09e361bb | 526 | return __gthr_win32_recursive_mutex_trylock (__mutex); |
40aac948 JM |
527 | else |
528 | return 0; | |
529 | } | |
530 | ||
531 | static inline int | |
09e361bb | 532 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
533 | { |
534 | if (__gthread_active_p ()) | |
09e361bb | 535 | return __gthr_win32_recursive_mutex_unlock (__mutex); |
40aac948 JM |
536 | else |
537 | return 0; | |
538 | } | |
539 | ||
1504e3e1 | 540 | static inline int |
5e3e4fe8 | 541 | __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) |
1504e3e1 JW |
542 | { |
543 | return __gthr_win32_recursive_mutex_destroy (__mutex); | |
544 | } | |
545 | ||
b25bb36a DS |
546 | #else /* ! __GTHREAD_HIDE_WIN32API */ |
547 | ||
548 | #include <windows.h> | |
549 | #include <errno.h> | |
550 | ||
62dafdeb | 551 | static inline int |
09e361bb | 552 | __gthread_once (__gthread_once_t *__once, void (*__func) (void)) |
62dafdeb MK |
553 | { |
554 | if (! __gthread_active_p ()) | |
555 | return -1; | |
09e361bb | 556 | else if (__once == NULL || __func == NULL) |
62dafdeb MK |
557 | return EINVAL; |
558 | ||
09e361bb | 559 | if (! __once->done) |
62dafdeb | 560 | { |
09e361bb | 561 | if (InterlockedIncrement (&(__once->started)) == 0) |
589005ff | 562 | { |
09e361bb JJ |
563 | (*__func) (); |
564 | __once->done = TRUE; | |
62dafdeb | 565 | } |
f22a97d2 MK |
566 | else |
567 | { | |
589005ff KH |
568 | /* Another thread is currently executing the code, so wait for it |
569 | to finish; yield the CPU in the meantime. If performance | |
570 | does become an issue, the solution is to use an Event that | |
571 | we wait on here (and set above), but that implies a place to | |
572 | create the event before this routine is called. */ | |
09e361bb | 573 | while (! __once->done) |
f22a97d2 MK |
574 | Sleep (0); |
575 | } | |
62dafdeb | 576 | } |
589005ff | 577 | |
62dafdeb MK |
578 | return 0; |
579 | } | |
580 | ||
f22a97d2 | 581 | /* Windows32 thread local keys don't support destructors; this leads to |
589005ff | 582 | leaks, especially in threaded applications making extensive use of |
f22a97d2 | 583 | C++ EH. Mingw uses a thread-support DLL to work-around this problem. */ |
62dafdeb | 584 | static inline int |
09e361bb JJ |
585 | __gthread_key_create (__gthread_key_t *__key, |
586 | void (*__dtor) (void *) __attribute__((unused))) | |
62dafdeb | 587 | { |
09e361bb JJ |
588 | int __status = 0; |
589 | DWORD __tls_index = TlsAlloc (); | |
590 | if (__tls_index != 0xFFFFFFFF) | |
f22a97d2 | 591 | { |
09e361bb | 592 | *__key = __tls_index; |
f22a97d2 MK |
593 | #ifdef MINGW32_SUPPORTS_MT_EH |
594 | /* Mingw runtime will run the dtors in reverse order for each thread | |
595 | when the thread exits. */ | |
09e361bb | 596 | __status = __mingwthr_key_dtor (*__key, __dtor); |
f22a97d2 MK |
597 | #endif |
598 | } | |
62dafdeb | 599 | else |
09e361bb JJ |
600 | __status = (int) GetLastError (); |
601 | return __status; | |
62dafdeb MK |
602 | } |
603 | ||
62dafdeb | 604 | static inline int |
09e361bb | 605 | __gthread_key_delete (__gthread_key_t __key) |
62dafdeb | 606 | { |
09e361bb | 607 | return (TlsFree (__key) != 0) ? 0 : (int) GetLastError (); |
62dafdeb MK |
608 | } |
609 | ||
610 | static inline void * | |
09e361bb | 611 | __gthread_getspecific (__gthread_key_t __key) |
62dafdeb | 612 | { |
09e361bb JJ |
613 | DWORD __lasterror; |
614 | void *__ptr; | |
69e905c8 | 615 | |
09e361bb | 616 | __lasterror = GetLastError (); |
69e905c8 | 617 | |
09e361bb | 618 | __ptr = TlsGetValue (__key); |
69e905c8 | 619 | |
09e361bb | 620 | SetLastError (__lasterror); |
69e905c8 | 621 | |
09e361bb | 622 | return __ptr; |
62dafdeb MK |
623 | } |
624 | ||
625 | static inline int | |
09e361bb | 626 | __gthread_setspecific (__gthread_key_t __key, const void *__ptr) |
62dafdeb | 627 | { |
09e361bb | 628 | if (TlsSetValue (__key, CONST_CAST2(void *, const void *, __ptr)) != 0) |
fea16f81 DS |
629 | return 0; |
630 | else | |
631 | return GetLastError (); | |
62dafdeb MK |
632 | } |
633 | ||
634 | static inline void | |
09e361bb | 635 | __gthread_mutex_init_function (__gthread_mutex_t *__mutex) |
62dafdeb | 636 | { |
09e361bb | 637 | __mutex->counter = -1; |
dff717d2 | 638 | __mutex->sema = CreateSemaphoreW (NULL, 0, 65535, NULL); |
62dafdeb MK |
639 | } |
640 | ||
ef4195d6 | 641 | static inline void |
09e361bb | 642 | __gthread_mutex_destroy (__gthread_mutex_t *__mutex) |
ef4195d6 | 643 | { |
09e361bb | 644 | CloseHandle ((HANDLE) __mutex->sema); |
ef4195d6 JD |
645 | } |
646 | ||
62dafdeb | 647 | static inline int |
09e361bb | 648 | __gthread_mutex_lock (__gthread_mutex_t *__mutex) |
62dafdeb | 649 | { |
09e361bb | 650 | int __status = 0; |
62dafdeb MK |
651 | |
652 | if (__gthread_active_p ()) | |
653 | { | |
09e361bb JJ |
654 | if (InterlockedIncrement (&__mutex->counter) == 0 || |
655 | WaitForSingleObject (__mutex->sema, INFINITE) == WAIT_OBJECT_0) | |
656 | __status = 0; | |
62dafdeb | 657 | else |
80408cac | 658 | { |
42dfcf84 WY |
659 | /* WaitForSingleObject returns WAIT_FAILED, and we can only do |
660 | some best-effort cleanup here. */ | |
09e361bb JJ |
661 | InterlockedDecrement (&__mutex->counter); |
662 | __status = 1; | |
80408cac | 663 | } |
62dafdeb | 664 | } |
09e361bb | 665 | return __status; |
62dafdeb MK |
666 | } |
667 | ||
668 | static inline int | |
09e361bb | 669 | __gthread_mutex_trylock (__gthread_mutex_t *__mutex) |
62dafdeb | 670 | { |
09e361bb | 671 | int __status = 0; |
62dafdeb MK |
672 | |
673 | if (__gthread_active_p ()) | |
674 | { | |
09e361bb JJ |
675 | if (__GTHR_W32_InterlockedCompareExchange (&__mutex->counter, 0, -1) < 0) |
676 | __status = 0; | |
62dafdeb | 677 | else |
09e361bb | 678 | __status = 1; |
62dafdeb | 679 | } |
09e361bb | 680 | return __status; |
62dafdeb MK |
681 | } |
682 | ||
683 | static inline int | |
09e361bb | 684 | __gthread_mutex_unlock (__gthread_mutex_t *__mutex) |
62dafdeb MK |
685 | { |
686 | if (__gthread_active_p ()) | |
80408cac | 687 | { |
09e361bb JJ |
688 | if (InterlockedDecrement (&__mutex->counter) >= 0) |
689 | return ReleaseSemaphore (__mutex->sema, 1, NULL) ? 0 : 1; | |
80408cac WY |
690 | } |
691 | return 0; | |
62dafdeb MK |
692 | } |
693 | ||
40aac948 | 694 | static inline void |
09e361bb | 695 | __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) |
40aac948 | 696 | { |
09e361bb JJ |
697 | __mutex->counter = -1; |
698 | __mutex->depth = 0; | |
699 | __mutex->owner = 0; | |
dff717d2 | 700 | __mutex->sema = CreateSemaphoreW (NULL, 0, 65535, NULL); |
40aac948 JM |
701 | } |
702 | ||
703 | static inline int | |
09e361bb | 704 | __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
705 | { |
706 | if (__gthread_active_p ()) | |
707 | { | |
09e361bb JJ |
708 | DWORD __me = GetCurrentThreadId(); |
709 | if (InterlockedIncrement (&__mutex->counter) == 0) | |
40aac948 | 710 | { |
09e361bb JJ |
711 | __mutex->depth = 1; |
712 | __mutex->owner = __me; | |
40aac948 | 713 | } |
09e361bb | 714 | else if (__mutex->owner == __me) |
40aac948 | 715 | { |
09e361bb JJ |
716 | InterlockedDecrement (&__mutex->counter); |
717 | ++(__mutex->depth); | |
40aac948 | 718 | } |
09e361bb | 719 | else if (WaitForSingleObject (__mutex->sema, INFINITE) == WAIT_OBJECT_0) |
40aac948 | 720 | { |
09e361bb JJ |
721 | __mutex->depth = 1; |
722 | __mutex->owner = __me; | |
40aac948 JM |
723 | } |
724 | else | |
725 | { | |
726 | /* WaitForSingleObject returns WAIT_FAILED, and we can only do | |
727 | some best-effort cleanup here. */ | |
09e361bb | 728 | InterlockedDecrement (&__mutex->counter); |
40aac948 JM |
729 | return 1; |
730 | } | |
731 | } | |
732 | return 0; | |
733 | } | |
734 | ||
735 | static inline int | |
09e361bb | 736 | __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
737 | { |
738 | if (__gthread_active_p ()) | |
739 | { | |
09e361bb JJ |
740 | DWORD __me = GetCurrentThreadId(); |
741 | if (__GTHR_W32_InterlockedCompareExchange (&__mutex->counter, 0, -1) < 0) | |
40aac948 | 742 | { |
09e361bb JJ |
743 | __mutex->depth = 1; |
744 | __mutex->owner = __me; | |
40aac948 | 745 | } |
09e361bb JJ |
746 | else if (__mutex->owner == __me) |
747 | ++(__mutex->depth); | |
40aac948 JM |
748 | else |
749 | return 1; | |
750 | } | |
751 | return 0; | |
752 | } | |
753 | ||
754 | static inline int | |
09e361bb | 755 | __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) |
40aac948 JM |
756 | { |
757 | if (__gthread_active_p ()) | |
758 | { | |
09e361bb JJ |
759 | --(__mutex->depth); |
760 | if (__mutex->depth == 0) | |
40aac948 | 761 | { |
09e361bb | 762 | __mutex->owner = 0; |
40aac948 | 763 | |
09e361bb JJ |
764 | if (InterlockedDecrement (&__mutex->counter) >= 0) |
765 | return ReleaseSemaphore (__mutex->sema, 1, NULL) ? 0 : 1; | |
40aac948 JM |
766 | } |
767 | } | |
768 | return 0; | |
769 | } | |
770 | ||
1504e3e1 | 771 | static inline int |
5e3e4fe8 | 772 | __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex) |
1504e3e1 | 773 | { |
5e3e4fe8 | 774 | CloseHandle ((HANDLE) __mutex->sema); |
1504e3e1 JW |
775 | return 0; |
776 | } | |
777 | ||
b25bb36a DS |
778 | #endif /* __GTHREAD_HIDE_WIN32API */ |
779 | ||
780 | #ifdef __cplusplus | |
781 | } | |
782 | #endif | |
783 | ||
15794a95 L |
784 | #endif /* _LIBOBJC */ |
785 | ||
88657302 | 786 | #endif /* ! GCC_GTHR_WIN32_H */ |