1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * gthread.c: solaris thread system implementation
5 * Copyright 1998-2001 Sebastian Wilhelmi; University of Karlsruhe
6 * Copyright 2001 Hans Breuer
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
26 * file for a list of people on the GLib Team. See the ChangeLog
27 * files for a list of changes. These files are distributed with
28 * GLib at ftp://ftp.gtk.org/pub/gtk/.
31 /* The GMutex and GCond implementations in this file are some of the
32 * lowest-level code in GLib. All other parts of GLib (messages,
33 * memory, slices, etc) assume that they can freely use these facilities
34 * without risking recursion.
36 * As such, these functions are NOT permitted to call any other part of
39 * The thread manipulation functions (create, exit, join, etc.) have
40 * more freedom -- they can do as they please.
46 #include "glib-init.h"
48 #include "gthreadprivate.h"
58 g_thread_abort (gint status,
59 const gchar *function)
61 fprintf (stderr, "GLib (gthread-win32.c): Unexpected error from C library during '%s': %s. Aborting.\n",
62 strerror (status), function);
66 /* Starting with Vista and Windows 2008, we have access to the
67 * CONDITION_VARIABLE and SRWLock primatives on Windows, which are
68 * pretty reasonable approximations of the primatives specified in
69 * POSIX 2001 (pthread_cond_t and pthread_mutex_t respectively).
71 * Both of these types are structs containing a single pointer. That
72 * pointer is used as an atomic bitfield to support user-space mutexes
73 * that only get the kernel involved in cases of contention (similar
74 * to how futex()-based mutexes work on Linux). The biggest advantage
75 * of these new types is that they can be statically initialised to
76 * zero. That means that they are completely ABI compatible with our
77 * GMutex and GCond APIs.
79 * Unfortunately, Windows XP lacks these facilities and GLib still
80 * needs to support Windows XP. Our approach here is as follows:
82 * - avoid depending on structure declarations at compile-time by
83 * declaring our own GMutex and GCond strutures to be
84 * ABI-compatible with SRWLock and CONDITION_VARIABLE and using
87 * - avoid a hard dependency on the symbols used to manipulate these
88 * structures by doing a dynamic lookup of those symbols at
91 * - if the symbols are not available, emulate them using other
94 * Using this approach also allows us to easily build a GLib that lacks
95 * support for Windows XP or to remove this code entirely when XP is no
96 * longer supported (end of line is currently April 8, 2014).
100 void (__stdcall * CallThisOnThreadExit) (void); /* fake */
102 void (__stdcall * InitializeSRWLock) (gpointer lock);
103 void (__stdcall * DeleteSRWLock) (gpointer lock); /* fake */
104 void (__stdcall * AcquireSRWLockExclusive) (gpointer lock);
105 BOOLEAN (__stdcall * TryAcquireSRWLockExclusive) (gpointer lock);
106 void (__stdcall * ReleaseSRWLockExclusive) (gpointer lock);
107 void (__stdcall * AcquireSRWLockShared) (gpointer lock);
108 BOOLEAN (__stdcall * TryAcquireSRWLockShared) (gpointer lock);
109 void (__stdcall * ReleaseSRWLockShared) (gpointer lock);
111 void (__stdcall * InitializeConditionVariable) (gpointer cond);
112 void (__stdcall * DeleteConditionVariable) (gpointer cond); /* fake */
113 BOOL (__stdcall * SleepConditionVariableSRW) (gpointer cond,
117 void (__stdcall * WakeAllConditionVariable) (gpointer cond);
118 void (__stdcall * WakeConditionVariable) (gpointer cond);
121 static GThreadImplVtable g_thread_impl_vtable;
125 g_mutex_init (GMutex *mutex)
127 g_thread_impl_vtable.InitializeSRWLock (mutex);
131 g_mutex_clear (GMutex *mutex)
133 if (g_thread_impl_vtable.DeleteSRWLock != NULL)
134 g_thread_impl_vtable.DeleteSRWLock (mutex);
138 g_mutex_lock (GMutex *mutex)
140 g_thread_impl_vtable.AcquireSRWLockExclusive (mutex);
144 g_mutex_trylock (GMutex *mutex)
146 return g_thread_impl_vtable.TryAcquireSRWLockExclusive (mutex);
150 g_mutex_unlock (GMutex *mutex)
152 g_thread_impl_vtable.ReleaseSRWLockExclusive (mutex);
157 static CRITICAL_SECTION *
158 g_rec_mutex_impl_new (void)
160 CRITICAL_SECTION *cs;
162 cs = g_slice_new (CRITICAL_SECTION);
163 InitializeCriticalSection (cs);
169 g_rec_mutex_impl_free (CRITICAL_SECTION *cs)
171 DeleteCriticalSection (cs);
172 g_slice_free (CRITICAL_SECTION, cs);
175 static CRITICAL_SECTION *
176 g_rec_mutex_get_impl (GRecMutex *mutex)
178 CRITICAL_SECTION *impl = mutex->p;
180 if G_UNLIKELY (mutex->p == NULL)
182 impl = g_rec_mutex_impl_new ();
183 if (InterlockedCompareExchangePointer (&mutex->p, impl, NULL) != NULL)
184 g_rec_mutex_impl_free (impl);
192 g_rec_mutex_init (GRecMutex *mutex)
194 mutex->p = g_rec_mutex_impl_new ();
198 g_rec_mutex_clear (GRecMutex *mutex)
200 g_rec_mutex_impl_free (mutex->p);
205 g_rec_mutex_lock (GRecMutex *mutex)
207 EnterCriticalSection (g_rec_mutex_get_impl (mutex));
211 g_rec_mutex_unlock (GRecMutex *mutex)
213 LeaveCriticalSection (mutex->p);
217 g_rec_mutex_trylock (GRecMutex *mutex)
219 return TryEnterCriticalSection (g_rec_mutex_get_impl (mutex));
225 g_rw_lock_init (GRWLock *lock)
227 g_thread_impl_vtable.InitializeSRWLock (lock);
231 g_rw_lock_clear (GRWLock *lock)
233 if (g_thread_impl_vtable.DeleteSRWLock != NULL)
234 g_thread_impl_vtable.DeleteSRWLock (lock);
238 g_rw_lock_writer_lock (GRWLock *lock)
240 g_thread_impl_vtable.AcquireSRWLockExclusive (lock);
244 g_rw_lock_writer_trylock (GRWLock *lock)
246 return g_thread_impl_vtable.TryAcquireSRWLockExclusive (lock);
250 g_rw_lock_writer_unlock (GRWLock *lock)
252 g_thread_impl_vtable.ReleaseSRWLockExclusive (lock);
256 g_rw_lock_reader_lock (GRWLock *lock)
258 g_thread_impl_vtable.AcquireSRWLockShared (lock);
262 g_rw_lock_reader_trylock (GRWLock *lock)
264 return g_thread_impl_vtable.TryAcquireSRWLockShared (lock);
268 g_rw_lock_reader_unlock (GRWLock *lock)
270 g_thread_impl_vtable.ReleaseSRWLockShared (lock);
275 g_cond_init (GCond *cond)
277 g_thread_impl_vtable.InitializeConditionVariable (cond);
281 g_cond_clear (GCond *cond)
283 if (g_thread_impl_vtable.DeleteConditionVariable)
284 g_thread_impl_vtable.DeleteConditionVariable (cond);
288 g_cond_signal (GCond *cond)
290 g_thread_impl_vtable.WakeConditionVariable (cond);
294 g_cond_broadcast (GCond *cond)
296 g_thread_impl_vtable.WakeAllConditionVariable (cond);
300 g_cond_wait (GCond *cond,
301 GMutex *entered_mutex)
303 g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, INFINITE, 0);
307 g_cond_wait_until (GCond *cond,
308 GMutex *entered_mutex,
313 span = end_time - g_get_monotonic_time ();
315 if G_UNLIKELY (span < 0)
318 if G_UNLIKELY (span > G_GINT64_CONSTANT (1000) * G_MAXINT32)
321 return g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, span / 1000, 0);
326 typedef struct _GPrivateDestructor GPrivateDestructor;
328 struct _GPrivateDestructor
331 GDestroyNotify notify;
332 GPrivateDestructor *next;
335 static GPrivateDestructor * volatile g_private_destructors;
336 static CRITICAL_SECTION g_private_lock;
339 g_private_get_impl (GPrivate *key)
341 DWORD impl = (DWORD) key->p;
343 if G_UNLIKELY (impl == 0)
345 EnterCriticalSection (&g_private_lock);
346 impl = (DWORD) key->p;
349 GPrivateDestructor *destructor;
353 if (impl == TLS_OUT_OF_INDEXES)
354 g_thread_abort (0, "TlsAlloc");
356 if (key->notify != NULL)
358 destructor = malloc (sizeof (GPrivateDestructor));
359 if G_UNLIKELY (destructor == NULL)
360 g_thread_abort (errno, "malloc");
361 destructor->index = impl;
362 destructor->notify = key->notify;
363 destructor->next = g_private_destructors;
365 /* We need to do an atomic store due to the unlocked
366 * access to the destructor list from the thread exit
369 * It can double as a sanity check...
371 if (InterlockedCompareExchangePointer (&g_private_destructors, destructor,
372 destructor->next) != destructor->next)
373 g_thread_abort (0, "g_private_get_impl(1)");
376 /* Ditto, due to the unlocked access on the fast path */
377 if (InterlockedCompareExchangePointer (&key->p, impl, NULL) != NULL)
378 g_thread_abort (0, "g_private_get_impl(2)");
380 LeaveCriticalSection (&g_private_lock);
387 g_private_get (GPrivate *key)
389 return TlsGetValue (g_private_get_impl (key));
393 g_private_set (GPrivate *key,
396 TlsSetValue (g_private_get_impl (key), value);
400 g_private_replace (GPrivate *key,
403 DWORD impl = g_private_get_impl (key);
406 old = TlsGetValue (impl);
407 if (old && key->notify)
409 TlsSetValue (impl, value);
414 #define win32_check_for_error(what) G_STMT_START{ \
416 g_error ("file %s: line %d (%s): error %s during %s", \
417 __FILE__, __LINE__, G_STRFUNC, \
418 g_win32_error_message (GetLastError ()), #what); \
421 #define G_MUTEX_SIZE (sizeof (gpointer))
423 typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
434 g_system_thread_free (GRealThread *thread)
436 GThreadWin32 *wt = (GThreadWin32 *) thread;
438 win32_check_for_error (CloseHandle (wt->handle));
439 g_slice_free (GThreadWin32, wt);
443 g_system_thread_exit (void)
448 static guint __stdcall
449 g_thread_win32_proxy (gpointer data)
451 GThreadWin32 *self = data;
455 g_system_thread_exit ();
457 g_assert_not_reached ();
463 g_system_thread_new (GThreadFunc func,
467 GThreadWin32 *thread;
470 thread = g_slice_new0 (GThreadWin32);
471 thread->proxy = func;
473 thread->handle = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_win32_proxy, thread, 0, &ignore);
475 if (thread->handle == NULL)
477 gchar *win_error = g_win32_error_message (GetLastError ());
478 g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
479 "Error creating thread: %s", win_error);
481 g_slice_free (GThreadWin32, thread);
485 return (GRealThread *) thread;
489 g_thread_yield (void)
495 g_system_thread_wait (GRealThread *thread)
497 GThreadWin32 *wt = (GThreadWin32 *) thread;
499 win32_check_for_error (WAIT_FAILED != WaitForSingleObject (wt->handle, INFINITE));
503 g_system_thread_set_name (const gchar *name)
505 /* FIXME: implement */
508 /* {{{1 SRWLock and CONDITION_VARIABLE emulation (for Windows XP) */
510 static CRITICAL_SECTION g_thread_xp_lock;
511 static DWORD g_thread_xp_waiter_tls;
513 /* {{{2 GThreadWaiter utility class for CONDITION_VARIABLE emulation */
514 typedef struct _GThreadXpWaiter GThreadXpWaiter;
515 struct _GThreadXpWaiter
518 volatile GThreadXpWaiter *next;
519 volatile GThreadXpWaiter **my_owner;
522 static GThreadXpWaiter *
523 g_thread_xp_waiter_get (void)
525 GThreadXpWaiter *waiter;
527 waiter = TlsGetValue (g_thread_xp_waiter_tls);
529 if G_UNLIKELY (waiter == NULL)
531 waiter = malloc (sizeof (GThreadXpWaiter));
533 g_thread_abort (GetLastError (), "malloc");
534 waiter->event = CreateEvent (0, FALSE, FALSE, NULL);
535 if (waiter->event == NULL)
536 g_thread_abort (GetLastError (), "CreateEvent");
537 waiter->my_owner = NULL;
539 TlsSetValue (g_thread_xp_waiter_tls, waiter);
545 static void __stdcall
546 g_thread_xp_CallThisOnThreadExit (void)
548 GThreadXpWaiter *waiter;
550 waiter = TlsGetValue (g_thread_xp_waiter_tls);
554 TlsSetValue (g_thread_xp_waiter_tls, NULL);
555 CloseHandle (waiter->event);
560 /* {{{2 SRWLock emulation */
563 CRITICAL_SECTION writer_lock;
564 gboolean ever_shared; /* protected by writer_lock */
565 gboolean writer_locked; /* protected by writer_lock */
567 /* below is only ever touched if ever_shared becomes true */
568 CRITICAL_SECTION atomicity;
569 GThreadXpWaiter *queued_writer; /* protected by atomicity lock */
570 gint num_readers; /* protected by atomicity lock */
573 static void __stdcall
574 g_thread_xp_InitializeSRWLock (gpointer mutex)
576 *(GThreadSRWLock * volatile *) mutex = NULL;
579 static void __stdcall
580 g_thread_xp_DeleteSRWLock (gpointer mutex)
582 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
586 if (lock->ever_shared)
587 DeleteCriticalSection (&lock->atomicity);
589 DeleteCriticalSection (&lock->writer_lock);
594 static GThreadSRWLock * __stdcall
595 g_thread_xp_get_srwlock (GThreadSRWLock * volatile *lock)
597 GThreadSRWLock *result;
599 /* It looks like we're missing some barriers here, but this code only
600 * ever runs on Windows XP, which in turn only ever runs on hardware
601 * with a relatively rigid memory model. The 'volatile' will take
602 * care of the compiler.
606 if G_UNLIKELY (result == NULL)
608 EnterCriticalSection (&g_thread_xp_lock);
614 result = malloc (sizeof (GThreadSRWLock));
617 g_thread_abort (errno, "malloc");
619 InitializeCriticalSection (&result->writer_lock);
620 result->writer_locked = FALSE;
621 result->ever_shared = FALSE;
625 LeaveCriticalSection (&g_thread_xp_lock);
631 static void __stdcall
632 g_thread_xp_AcquireSRWLockExclusive (gpointer mutex)
634 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
636 EnterCriticalSection (&lock->writer_lock);
638 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
639 * Detect the deadlock that would occur on later Windows version.
641 g_assert (!lock->writer_locked);
642 lock->writer_locked = TRUE;
644 if (lock->ever_shared)
646 GThreadXpWaiter *waiter = NULL;
648 EnterCriticalSection (&lock->atomicity);
649 if (lock->num_readers > 0)
650 lock->queued_writer = waiter = g_thread_xp_waiter_get ();
651 LeaveCriticalSection (&lock->atomicity);
654 WaitForSingleObject (waiter->event, INFINITE);
656 lock->queued_writer = NULL;
660 static BOOLEAN __stdcall
661 g_thread_xp_TryAcquireSRWLockExclusive (gpointer mutex)
663 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
665 if (!TryEnterCriticalSection (&lock->writer_lock))
668 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
669 * Ensure that this properly returns FALSE (as SRWLock would).
671 if G_UNLIKELY (lock->writer_locked)
673 LeaveCriticalSection (&lock->writer_lock);
677 lock->writer_locked = TRUE;
679 if (lock->ever_shared)
683 EnterCriticalSection (&lock->atomicity);
684 available = lock->num_readers == 0;
685 LeaveCriticalSection (&lock->atomicity);
689 LeaveCriticalSection (&lock->writer_lock);
697 static void __stdcall
698 g_thread_xp_ReleaseSRWLockExclusive (gpointer mutex)
700 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
702 lock->writer_locked = FALSE;
704 /* We need this until we fix some weird parts of GLib that try to
705 * unlock freshly-allocated mutexes.
708 LeaveCriticalSection (&lock->writer_lock);
712 g_thread_xp_srwlock_become_reader (GThreadSRWLock *lock)
714 if G_UNLIKELY (!lock->ever_shared)
716 InitializeCriticalSection (&lock->atomicity);
717 lock->queued_writer = NULL;
718 lock->num_readers = 0;
720 lock->ever_shared = TRUE;
723 EnterCriticalSection (&lock->atomicity);
725 LeaveCriticalSection (&lock->atomicity);
728 static void __stdcall
729 g_thread_xp_AcquireSRWLockShared (gpointer mutex)
731 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
733 EnterCriticalSection (&lock->writer_lock);
735 /* See g_thread_xp_AcquireSRWLockExclusive */
736 g_assert (!lock->writer_locked);
738 g_thread_xp_srwlock_become_reader (lock);
740 LeaveCriticalSection (&lock->writer_lock);
743 static BOOLEAN __stdcall
744 g_thread_xp_TryAcquireSRWLockShared (gpointer mutex)
746 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
748 if (!TryEnterCriticalSection (&lock->writer_lock))
751 /* See g_thread_xp_AcquireSRWLockExclusive */
752 if G_UNLIKELY (lock->writer_locked)
754 LeaveCriticalSection (&lock->writer_lock);
758 g_thread_xp_srwlock_become_reader (lock);
760 LeaveCriticalSection (&lock->writer_lock);
765 static void __stdcall
766 g_thread_xp_ReleaseSRWLockShared (gpointer mutex)
768 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
770 EnterCriticalSection (&lock->atomicity);
774 if (lock->num_readers == 0 && lock->queued_writer)
775 SetEvent (lock->queued_writer->event);
777 LeaveCriticalSection (&lock->atomicity);
780 /* {{{2 CONDITION_VARIABLE emulation */
783 volatile GThreadXpWaiter *first;
784 volatile GThreadXpWaiter **last_ptr;
785 } GThreadXpCONDITION_VARIABLE;
787 static void __stdcall
788 g_thread_xp_InitializeConditionVariable (gpointer cond)
790 *(GThreadXpCONDITION_VARIABLE * volatile *) cond = NULL;
793 static void __stdcall
794 g_thread_xp_DeleteConditionVariable (gpointer cond)
796 GThreadXpCONDITION_VARIABLE *cv = *(GThreadXpCONDITION_VARIABLE * volatile *) cond;
802 static GThreadXpCONDITION_VARIABLE * __stdcall
803 g_thread_xp_get_condition_variable (GThreadXpCONDITION_VARIABLE * volatile *cond)
805 GThreadXpCONDITION_VARIABLE *result;
807 /* It looks like we're missing some barriers here, but this code only
808 * ever runs on Windows XP, which in turn only ever runs on hardware
809 * with a relatively rigid memory model. The 'volatile' will take
810 * care of the compiler.
814 if G_UNLIKELY (result == NULL)
816 result = malloc (sizeof (GThreadXpCONDITION_VARIABLE));
819 g_thread_abort (errno, "malloc");
821 result->first = NULL;
822 result->last_ptr = &result->first;
824 if (InterlockedCompareExchangePointer (cond, result, NULL) != NULL)
834 static BOOL __stdcall
835 g_thread_xp_SleepConditionVariableSRW (gpointer cond,
840 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
841 GThreadXpWaiter *waiter = g_thread_xp_waiter_get ();
846 EnterCriticalSection (&g_thread_xp_lock);
847 waiter->my_owner = cv->last_ptr;
848 *cv->last_ptr = waiter;
849 cv->last_ptr = &waiter->next;
850 LeaveCriticalSection (&g_thread_xp_lock);
852 g_mutex_unlock (mutex);
853 status = WaitForSingleObject (waiter->event, timeout);
855 if (status != WAIT_TIMEOUT && status != WAIT_OBJECT_0)
856 g_thread_abort (GetLastError (), "WaitForSingleObject");
857 g_mutex_lock (mutex);
859 if (status == WAIT_TIMEOUT)
861 EnterCriticalSection (&g_thread_xp_lock);
862 if (waiter->my_owner)
865 waiter->next->my_owner = waiter->my_owner;
867 cv->last_ptr = waiter->my_owner;
868 *waiter->my_owner = waiter->next;
869 waiter->my_owner = NULL;
871 LeaveCriticalSection (&g_thread_xp_lock);
874 return status == WAIT_OBJECT_0;
877 static void __stdcall
878 g_thread_xp_WakeConditionVariable (gpointer cond)
880 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
881 volatile GThreadXpWaiter *waiter;
883 EnterCriticalSection (&g_thread_xp_lock);
888 waiter->my_owner = NULL;
889 cv->first = waiter->next;
890 if (cv->first != NULL)
891 cv->first->my_owner = &cv->first;
893 cv->last_ptr = &cv->first;
897 SetEvent (waiter->event);
899 LeaveCriticalSection (&g_thread_xp_lock);
902 static void __stdcall
903 g_thread_xp_WakeAllConditionVariable (gpointer cond)
905 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
906 volatile GThreadXpWaiter *waiter;
908 EnterCriticalSection (&g_thread_xp_lock);
912 cv->last_ptr = &cv->first;
914 while (waiter != NULL)
916 volatile GThreadXpWaiter *next;
919 SetEvent (waiter->event);
920 waiter->my_owner = NULL;
924 LeaveCriticalSection (&g_thread_xp_lock);
929 g_thread_xp_init (void)
931 static const GThreadImplVtable g_thread_xp_impl_vtable = {
932 g_thread_xp_CallThisOnThreadExit,
933 g_thread_xp_InitializeSRWLock,
934 g_thread_xp_DeleteSRWLock,
935 g_thread_xp_AcquireSRWLockExclusive,
936 g_thread_xp_TryAcquireSRWLockExclusive,
937 g_thread_xp_ReleaseSRWLockExclusive,
938 g_thread_xp_AcquireSRWLockShared,
939 g_thread_xp_TryAcquireSRWLockShared,
940 g_thread_xp_ReleaseSRWLockShared,
941 g_thread_xp_InitializeConditionVariable,
942 g_thread_xp_DeleteConditionVariable,
943 g_thread_xp_SleepConditionVariableSRW,
944 g_thread_xp_WakeAllConditionVariable,
945 g_thread_xp_WakeConditionVariable
948 InitializeCriticalSection (&g_thread_xp_lock);
949 g_thread_xp_waiter_tls = TlsAlloc ();
951 g_thread_impl_vtable = g_thread_xp_impl_vtable;
957 g_thread_lookup_native_funcs (void)
959 GThreadImplVtable native_vtable = { 0, };
962 kernel32 = GetModuleHandle ("KERNEL32.DLL");
964 if (kernel32 == NULL)
967 #define GET_FUNC(name) if ((native_vtable.name = (void *) GetProcAddress (kernel32, #name)) == NULL) return FALSE
968 GET_FUNC(InitializeSRWLock);
969 GET_FUNC(AcquireSRWLockExclusive);
970 GET_FUNC(TryAcquireSRWLockExclusive);
971 GET_FUNC(ReleaseSRWLockExclusive);
972 GET_FUNC(AcquireSRWLockShared);
973 GET_FUNC(TryAcquireSRWLockShared);
974 GET_FUNC(ReleaseSRWLockShared);
976 GET_FUNC(InitializeConditionVariable);
977 GET_FUNC(SleepConditionVariableSRW);
978 GET_FUNC(WakeAllConditionVariable);
979 GET_FUNC(WakeConditionVariable);
982 g_thread_impl_vtable = native_vtable;
988 g_thread_win32_init (void)
990 if (!g_thread_lookup_native_funcs ())
993 InitializeCriticalSection (&g_private_lock);
997 g_thread_win32_thread_detach (void)
999 gboolean dtors_called;
1003 GPrivateDestructor *dtor;
1005 /* We go by the POSIX book on this one.
1007 * If we call a destructor then there is a chance that some new
1008 * TLS variables got set by code called in that destructor.
1010 * Loop until nothing is left.
1012 dtors_called = FALSE;
1014 for (dtor = g_private_destructors; dtor; dtor = dtor->next)
1018 value = TlsGetValue (dtor->index);
1019 if (value != NULL && dtor->notify != NULL)
1021 /* POSIX says to clear this before the call */
1022 TlsSetValue (dtor->index, NULL);
1023 dtor->notify (value);
1024 dtors_called = TRUE;
1028 while (dtors_called);
1030 if (g_thread_impl_vtable.CallThisOnThreadExit)
1031 g_thread_impl_vtable.CallThisOnThreadExit ();
1034 /* vim:set foldmethod=marker: */