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 "gthreadprivate.h"
56 g_thread_abort (gint status,
57 const gchar *function)
59 fprintf (stderr, "GLib (gthread-win32.c): Unexpected error from C library during '%s': %s. Aborting.\n",
60 strerror (status), function);
64 /* Starting with Vista and Windows 2008, we have access to the
65 * CONDITION_VARIABLE and SRWLock primatives on Windows, which are
66 * pretty reasonable approximations of the primatives specified in
67 * POSIX 2001 (pthread_cond_t and pthread_mutex_t respectively).
69 * Both of these types are structs containing a single pointer. That
70 * pointer is used as an atomic bitfield to support user-space mutexes
71 * that only get the kernel involved in cases of contention (similar
72 * to how futex()-based mutexes work on Linux). The biggest advantage
73 * of these new types is that they can be statically initialised to
74 * zero. That means that they are completely ABI compatible with our
75 * GMutex and GCond APIs.
77 * Unfortunately, Windows XP lacks these facilities and GLib still
78 * needs to support Windows XP. Our approach here is as follows:
80 * - avoid depending on structure declarations at compile-time by
81 * declaring our own GMutex and GCond strutures to be
82 * ABI-compatible with SRWLock and CONDITION_VARIABLE and using
85 * - avoid a hard dependency on the symbols used to manipulate these
86 * structures by doing a dynamic lookup of those symbols at
89 * - if the symbols are not available, emulate them using other
92 * Using this approach also allows us to easily build a GLib that lacks
93 * support for Windows XP or to remove this code entirely when XP is no
94 * longer supported (end of line is currently April 8, 2014).
98 void (__stdcall * CallThisOnThreadExit) (void); /* fake */
100 void (__stdcall * InitializeSRWLock) (gpointer lock);
101 void (__stdcall * DeleteSRWLock) (gpointer lock); /* fake */
102 void (__stdcall * AcquireSRWLockExclusive) (gpointer lock);
103 BOOLEAN (__stdcall * TryAcquireSRWLockExclusive) (gpointer lock);
104 void (__stdcall * ReleaseSRWLockExclusive) (gpointer lock);
105 void (__stdcall * AcquireSRWLockShared) (gpointer lock);
106 BOOLEAN (__stdcall * TryAcquireSRWLockShared) (gpointer lock);
107 void (__stdcall * ReleaseSRWLockShared) (gpointer lock);
109 void (__stdcall * InitializeConditionVariable) (gpointer cond);
110 void (__stdcall * DeleteConditionVariable) (gpointer cond); /* fake */
111 BOOL (__stdcall * SleepConditionVariableSRW) (gpointer cond,
115 void (__stdcall * WakeAllConditionVariable) (gpointer cond);
116 void (__stdcall * WakeConditionVariable) (gpointer cond);
119 static GThreadImplVtable g_thread_impl_vtable;
123 g_mutex_init (GMutex *mutex)
125 g_thread_impl_vtable.InitializeSRWLock (mutex);
129 g_mutex_clear (GMutex *mutex)
131 if (g_thread_impl_vtable.DeleteSRWLock != NULL)
132 g_thread_impl_vtable.DeleteSRWLock (mutex);
136 g_mutex_lock (GMutex *mutex)
138 g_thread_impl_vtable.AcquireSRWLockExclusive (mutex);
142 g_mutex_trylock (GMutex *mutex)
144 return g_thread_impl_vtable.TryAcquireSRWLockExclusive (mutex);
148 g_mutex_unlock (GMutex *mutex)
150 g_thread_impl_vtable.ReleaseSRWLockExclusive (mutex);
155 static CRITICAL_SECTION *
156 g_rec_mutex_impl_new (void)
158 CRITICAL_SECTION *cs;
160 cs = g_slice_new (CRITICAL_SECTION);
161 InitializeCriticalSection (cs);
167 g_rec_mutex_impl_free (CRITICAL_SECTION *cs)
169 DeleteCriticalSection (cs);
170 g_slice_free (CRITICAL_SECTION, cs);
173 static CRITICAL_SECTION *
174 g_rec_mutex_get_impl (GRecMutex *mutex)
176 CRITICAL_SECTION *impl = mutex->p;
178 if G_UNLIKELY (mutex->p == NULL)
180 impl = g_rec_mutex_impl_new ();
181 if (InterlockedCompareExchangePointer (&mutex->p, impl, NULL) != NULL)
182 g_rec_mutex_impl_free (impl);
190 g_rec_mutex_init (GRecMutex *mutex)
192 mutex->p = g_rec_mutex_impl_new ();
196 g_rec_mutex_clear (GRecMutex *mutex)
198 g_rec_mutex_impl_free (mutex->p);
202 g_rec_mutex_lock (GRecMutex *mutex)
204 EnterCriticalSection (g_rec_mutex_get_impl (mutex));
208 g_rec_mutex_unlock (GRecMutex *mutex)
210 LeaveCriticalSection (mutex->p);
214 g_rec_mutex_trylock (GRecMutex *mutex)
216 return TryEnterCriticalSection (g_rec_mutex_get_impl (mutex));
222 g_rw_lock_init (GRWLock *lock)
224 g_thread_impl_vtable.InitializeSRWLock (lock);
228 g_rw_lock_clear (GRWLock *lock)
230 if (g_thread_impl_vtable.DeleteSRWLock != NULL)
231 g_thread_impl_vtable.DeleteSRWLock (lock);
235 g_rw_lock_writer_lock (GRWLock *lock)
237 g_thread_impl_vtable.AcquireSRWLockExclusive (lock);
241 g_rw_lock_writer_trylock (GRWLock *lock)
243 return g_thread_impl_vtable.TryAcquireSRWLockExclusive (lock);
247 g_rw_lock_writer_unlock (GRWLock *lock)
249 g_thread_impl_vtable.ReleaseSRWLockExclusive (lock);
253 g_rw_lock_reader_lock (GRWLock *lock)
255 g_thread_impl_vtable.AcquireSRWLockShared (lock);
259 g_rw_lock_reader_trylock (GRWLock *lock)
261 return g_thread_impl_vtable.TryAcquireSRWLockShared (lock);
265 g_rw_lock_reader_unlock (GRWLock *lock)
267 g_thread_impl_vtable.ReleaseSRWLockShared (lock);
272 g_cond_init (GCond *cond)
274 g_thread_impl_vtable.InitializeConditionVariable (cond);
278 g_cond_clear (GCond *cond)
280 if (g_thread_impl_vtable.DeleteConditionVariable)
281 g_thread_impl_vtable.DeleteConditionVariable (cond);
285 g_cond_signal (GCond *cond)
287 g_thread_impl_vtable.WakeConditionVariable (cond);
291 g_cond_broadcast (GCond *cond)
293 g_thread_impl_vtable.WakeAllConditionVariable (cond);
297 g_cond_wait (GCond *cond,
298 GMutex *entered_mutex)
300 g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, INFINITE, 0);
304 g_cond_wait_until (GCond *cond,
305 GMutex *entered_mutex,
312 GetSystemTimeAsFileTime (&ft);
313 memmove (&now, &ft, sizeof (FILETIME));
315 now -= G_GINT64_CONSTANT (116444736000000000);
318 span = end_time - now;
320 if G_UNLIKELY (span < 0)
323 if G_UNLIKELY (span > G_GINT64_CONSTANT (1000) * G_MAXINT32)
326 return g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, span / 1000, 0);
331 typedef struct _GPrivateDestructor GPrivateDestructor;
333 struct _GPrivateDestructor
336 GDestroyNotify notify;
337 GPrivateDestructor *next;
340 static GPrivateDestructor * volatile g_private_destructors;
341 static CRITICAL_SECTION g_private_lock;
344 g_private_get_impl (GPrivate *key)
346 DWORD impl = (DWORD) key->p;
348 if G_UNLIKELY (impl == 0)
350 EnterCriticalSection (&g_private_lock);
351 impl = (DWORD) key->p;
354 GPrivateDestructor *destructor;
358 if (impl == TLS_OUT_OF_INDEXES)
359 g_thread_abort (0, "TlsAlloc");
361 if (key->notify != NULL)
363 destructor = malloc (sizeof (GPrivateDestructor));
364 if G_UNLIKELY (destructor == NULL)
365 g_thread_abort (errno, "malloc");
366 destructor->index = impl;
367 destructor->notify = key->notify;
368 destructor->next = g_private_destructors;
370 /* We need to do an atomic store due to the unlocked
371 * access to the destructor list from the thread exit
374 * It can double as a sanity check...
376 if (InterlockedCompareExchangePointer (&g_private_destructors, destructor,
377 destructor->next) != destructor->next)
378 g_thread_abort (0, "g_private_get_impl(1)");
381 /* Ditto, due to the unlocked access on the fast path */
382 if (InterlockedCompareExchangePointer (&key->p, impl, NULL) != NULL)
383 g_thread_abort (0, "g_private_get_impl(2)");
385 LeaveCriticalSection (&g_private_lock);
392 g_private_get (GPrivate *key)
394 return TlsGetValue (g_private_get_impl (key));
398 g_private_set (GPrivate *key,
401 TlsSetValue (g_private_get_impl (key), value);
405 g_private_replace (GPrivate *key,
408 DWORD impl = g_private_get_impl (key);
411 old = TlsGetValue (impl);
412 if (old && key->notify)
414 TlsSetValue (impl, value);
420 #include "gthreadprivate.h"
422 #define win32_check_for_error(what) G_STMT_START{ \
424 g_error ("file %s: line %d (%s): error %s during %s", \
425 __FILE__, __LINE__, G_STRFUNC, \
426 g_win32_error_message (GetLastError ()), #what); \
429 #define G_MUTEX_SIZE (sizeof (gpointer))
431 typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
442 g_system_thread_free (GRealThread *thread)
444 GThreadWin32 *wt = (GThreadWin32 *) thread;
446 win32_check_for_error (CloseHandle (wt->handle));
447 g_slice_free (GThreadWin32, wt);
451 g_system_thread_exit (void)
456 static guint __stdcall
457 g_thread_win32_proxy (gpointer data)
459 GThreadWin32 *self = data;
463 g_system_thread_exit ();
465 g_assert_not_reached ();
471 g_system_thread_new (GThreadFunc func,
475 GThreadWin32 *thread;
478 thread = g_slice_new0 (GThreadWin32);
479 thread->proxy = func;
481 thread->handle = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_win32_proxy, thread, 0, &ignore);
483 if (thread->handle == NULL)
485 gchar *win_error = g_win32_error_message (GetLastError ());
486 g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
487 "Error creating thread: %s", win_error);
489 g_slice_free (GThreadWin32, thread);
493 return (GRealThread *) thread;
497 g_thread_yield (void)
503 g_system_thread_wait (GRealThread *thread)
505 GThreadWin32 *wt = (GThreadWin32 *) thread;
507 win32_check_for_error (WAIT_FAILED != WaitForSingleObject (wt->handle, INFINITE));
511 g_system_thread_set_name (const gchar *name)
513 /* FIXME: implement */
516 /* {{{1 SRWLock and CONDITION_VARIABLE emulation (for Windows XP) */
518 static CRITICAL_SECTION g_thread_xp_lock;
519 static DWORD g_thread_xp_waiter_tls;
521 /* {{{2 GThreadWaiter utility class for CONDITION_VARIABLE emulation */
522 typedef struct _GThreadXpWaiter GThreadXpWaiter;
523 struct _GThreadXpWaiter
526 volatile GThreadXpWaiter *next;
529 static GThreadXpWaiter *
530 g_thread_xp_waiter_get (void)
532 GThreadXpWaiter *waiter;
534 waiter = TlsGetValue (g_thread_xp_waiter_tls);
536 if G_UNLIKELY (waiter == NULL)
538 waiter = malloc (sizeof (GThreadXpWaiter));
540 g_thread_abort (GetLastError (), "malloc");
541 waiter->event = CreateEvent (0, FALSE, FALSE, NULL);
542 if (waiter->event == NULL)
543 g_thread_abort (GetLastError (), "CreateEvent");
545 TlsSetValue (g_thread_xp_waiter_tls, waiter);
551 static void __stdcall
552 g_thread_xp_CallThisOnThreadExit (void)
554 GThreadXpWaiter *waiter;
556 waiter = TlsGetValue (g_thread_xp_waiter_tls);
560 TlsSetValue (g_thread_xp_waiter_tls, NULL);
561 CloseHandle (waiter->event);
566 /* {{{2 SRWLock emulation */
569 CRITICAL_SECTION writer_lock;
570 gboolean ever_shared; /* protected by writer_lock */
571 gboolean writer_locked; /* protected by writer_lock */
573 /* below is only ever touched if ever_shared becomes true */
574 CRITICAL_SECTION atomicity;
575 GThreadXpWaiter *queued_writer; /* protected by atomicity lock */
576 gint num_readers; /* protected by atomicity lock */
579 static void __stdcall
580 g_thread_xp_InitializeSRWLock (gpointer mutex)
582 *(GThreadSRWLock * volatile *) mutex = NULL;
585 static void __stdcall
586 g_thread_xp_DeleteSRWLock (gpointer mutex)
588 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
592 if (lock->ever_shared)
593 DeleteCriticalSection (&lock->atomicity);
595 DeleteCriticalSection (&lock->writer_lock);
600 static GThreadSRWLock * __stdcall
601 g_thread_xp_get_srwlock (GThreadSRWLock * volatile *lock)
603 GThreadSRWLock *result;
605 /* It looks like we're missing some barriers here, but this code only
606 * ever runs on Windows XP, which in turn only ever runs on hardware
607 * with a relatively rigid memory model. The 'volatile' will take
608 * care of the compiler.
612 if G_UNLIKELY (result == NULL)
614 EnterCriticalSection (&g_thread_xp_lock);
616 result = malloc (sizeof (GThreadSRWLock));
619 g_thread_abort (errno, "malloc");
621 InitializeCriticalSection (&result->writer_lock);
622 result->writer_locked = FALSE;
623 result->ever_shared = FALSE;
626 LeaveCriticalSection (&g_thread_xp_lock);
632 static void __stdcall
633 g_thread_xp_AcquireSRWLockExclusive (gpointer mutex)
635 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
637 EnterCriticalSection (&lock->writer_lock);
639 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
640 * Detect the deadlock that would occur on later Windows version.
642 g_assert (!lock->writer_locked);
643 lock->writer_locked = TRUE;
645 if (lock->ever_shared)
647 GThreadXpWaiter *waiter = NULL;
649 EnterCriticalSection (&lock->atomicity);
650 if (lock->num_readers > 0)
651 lock->queued_writer = waiter = g_thread_xp_waiter_get ();
652 LeaveCriticalSection (&lock->atomicity);
655 WaitForSingleObject (waiter->event, INFINITE);
657 lock->queued_writer = NULL;
661 static BOOLEAN __stdcall
662 g_thread_xp_TryAcquireSRWLockExclusive (gpointer mutex)
664 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
666 if (!TryEnterCriticalSection (&lock->writer_lock))
669 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
670 * Ensure that this properly returns FALSE (as SRWLock would).
672 if G_UNLIKELY (lock->writer_locked)
674 LeaveCriticalSection (&lock->writer_lock);
678 lock->writer_locked = TRUE;
680 if (lock->ever_shared)
684 EnterCriticalSection (&lock->atomicity);
685 available = lock->num_readers == 0;
686 LeaveCriticalSection (&lock->atomicity);
690 LeaveCriticalSection (&lock->writer_lock);
698 static void __stdcall
699 g_thread_xp_ReleaseSRWLockExclusive (gpointer mutex)
701 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
703 lock->writer_locked = FALSE;
705 /* We need this until we fix some weird parts of GLib that try to
706 * unlock freshly-allocated mutexes.
709 LeaveCriticalSection (&lock->writer_lock);
713 g_thread_xp_srwlock_become_reader (GThreadSRWLock *lock)
715 if G_UNLIKELY (!lock->ever_shared)
717 InitializeCriticalSection (&lock->atomicity);
718 lock->queued_writer = NULL;
719 lock->num_readers = 0;
721 lock->ever_shared = TRUE;
724 EnterCriticalSection (&lock->atomicity);
726 LeaveCriticalSection (&lock->atomicity);
729 static void __stdcall
730 g_thread_xp_AcquireSRWLockShared (gpointer mutex)
732 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
734 EnterCriticalSection (&lock->writer_lock);
736 /* See g_thread_xp_AcquireSRWLockExclusive */
737 g_assert (!lock->writer_locked);
739 g_thread_xp_srwlock_become_reader (lock);
741 LeaveCriticalSection (&lock->writer_lock);
744 static BOOLEAN __stdcall
745 g_thread_xp_TryAcquireSRWLockShared (gpointer mutex)
747 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
749 if (!TryEnterCriticalSection (&lock->writer_lock))
752 /* See g_thread_xp_AcquireSRWLockExclusive */
753 if G_UNLIKELY (lock->writer_locked)
755 LeaveCriticalSection (&lock->writer_lock);
759 g_thread_xp_srwlock_become_reader (lock);
761 LeaveCriticalSection (&lock->writer_lock);
766 static void __stdcall
767 g_thread_xp_ReleaseSRWLockShared (gpointer mutex)
769 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
771 EnterCriticalSection (&lock->atomicity);
775 if (lock->num_readers == 0 && lock->queued_writer)
776 SetEvent (lock->queued_writer->event);
778 LeaveCriticalSection (&lock->atomicity);
781 /* {{{2 CONDITION_VARIABLE emulation */
784 volatile GThreadXpWaiter *first;
785 volatile GThreadXpWaiter **last_ptr;
786 } GThreadXpCONDITION_VARIABLE;
788 static void __stdcall
789 g_thread_xp_InitializeConditionVariable (gpointer cond)
791 *(GThreadXpCONDITION_VARIABLE * volatile *) cond = NULL;
794 static void __stdcall
795 g_thread_xp_DeleteConditionVariable (gpointer cond)
797 GThreadXpCONDITION_VARIABLE *cv = *(GThreadXpCONDITION_VARIABLE * volatile *) cond;
803 static GThreadXpCONDITION_VARIABLE * __stdcall
804 g_thread_xp_get_condition_variable (GThreadXpCONDITION_VARIABLE * volatile *cond)
806 GThreadXpCONDITION_VARIABLE *result;
808 /* It looks like we're missing some barriers here, but this code only
809 * ever runs on Windows XP, which in turn only ever runs on hardware
810 * with a relatively rigid memory model. The 'volatile' will take
811 * care of the compiler.
815 if G_UNLIKELY (result == NULL)
817 result = malloc (sizeof (GThreadXpCONDITION_VARIABLE));
820 g_thread_abort (errno, "malloc");
822 result->first = NULL;
823 result->last_ptr = &result->first;
825 if (InterlockedCompareExchangePointer (cond, result, NULL) != NULL)
835 static BOOL __stdcall
836 g_thread_xp_SleepConditionVariableSRW (gpointer cond,
841 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
842 GThreadXpWaiter *waiter = g_thread_xp_waiter_get ();
847 EnterCriticalSection (&g_thread_xp_lock);
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");
858 g_mutex_lock (mutex);
860 return status == WAIT_OBJECT_0;
863 static void __stdcall
864 g_thread_xp_WakeConditionVariable (gpointer cond)
866 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
867 volatile GThreadXpWaiter *waiter;
869 EnterCriticalSection (&g_thread_xp_lock);
873 cv->first = waiter->next;
874 if (cv->first == NULL)
875 cv->last_ptr = &cv->first;
877 LeaveCriticalSection (&g_thread_xp_lock);
880 SetEvent (waiter->event);
883 static void __stdcall
884 g_thread_xp_WakeAllConditionVariable (gpointer cond)
886 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
887 volatile GThreadXpWaiter *waiter;
889 EnterCriticalSection (&g_thread_xp_lock);
892 cv->last_ptr = &cv->first;
893 LeaveCriticalSection (&g_thread_xp_lock);
895 while (waiter != NULL)
897 volatile GThreadXpWaiter *next;
900 SetEvent (waiter->event);
907 g_thread_xp_init (void)
909 static const GThreadImplVtable g_thread_xp_impl_vtable = {
910 g_thread_xp_CallThisOnThreadExit,
911 g_thread_xp_InitializeSRWLock,
912 g_thread_xp_DeleteSRWLock,
913 g_thread_xp_AcquireSRWLockExclusive,
914 g_thread_xp_TryAcquireSRWLockExclusive,
915 g_thread_xp_ReleaseSRWLockExclusive,
916 g_thread_xp_AcquireSRWLockShared,
917 g_thread_xp_TryAcquireSRWLockShared,
918 g_thread_xp_ReleaseSRWLockShared,
919 g_thread_xp_InitializeConditionVariable,
920 g_thread_xp_DeleteConditionVariable,
921 g_thread_xp_SleepConditionVariableSRW,
922 g_thread_xp_WakeAllConditionVariable,
923 g_thread_xp_WakeConditionVariable
926 InitializeCriticalSection (&g_thread_xp_lock);
927 g_thread_xp_waiter_tls = TlsAlloc ();
929 g_thread_impl_vtable = g_thread_xp_impl_vtable;
935 g_thread_lookup_native_funcs (void)
937 GThreadImplVtable native_vtable = { 0, };
940 kernel32 = GetModuleHandle ("KERNEL32.DLL");
942 if (kernel32 == NULL)
945 #define GET_FUNC(name) if ((native_vtable.name = (void *) GetProcAddress (kernel32, #name)) == NULL) return FALSE
946 GET_FUNC(InitializeSRWLock);
947 GET_FUNC(AcquireSRWLockExclusive);
948 GET_FUNC(TryAcquireSRWLockExclusive);
949 GET_FUNC(ReleaseSRWLockExclusive);
950 GET_FUNC(AcquireSRWLockShared);
951 GET_FUNC(TryAcquireSRWLockShared);
952 GET_FUNC(ReleaseSRWLockShared);
954 GET_FUNC(InitializeConditionVariable);
955 GET_FUNC(SleepConditionVariableSRW);
956 GET_FUNC(WakeAllConditionVariable);
957 GET_FUNC(WakeConditionVariable);
960 g_thread_impl_vtable = native_vtable;
966 g_thread_win32_init (void)
968 if (g_thread_lookup_native_funcs ())
969 fprintf (stderr, "(debug) GThread using native mode\n");
972 fprintf (stderr, "(debug) GThread using Windows XP mode\n");
976 InitializeCriticalSection (&g_private_lock);
980 g_thread_win32_thread_detach (void)
982 gboolean dtors_called;
986 GPrivateDestructor *dtor;
988 /* We go by the POSIX book on this one.
990 * If we call a destructor then there is a chance that some new
991 * TLS variables got set by code called in that destructor.
993 * Loop until nothing is left.
995 dtors_called = FALSE;
997 for (dtor = g_private_destructors; dtor; dtor = dtor->next)
1001 value = TlsGetValue (dtor->index);
1002 if (value != NULL && dtor->notify != NULL)
1004 /* POSIX says to clear this before the call */
1005 TlsSetValue (dtor->index, NULL);
1006 dtor->notify (value);
1007 dtors_called = TRUE;
1011 while (dtors_called);
1013 if (g_thread_impl_vtable.CallThisOnThreadExit)
1014 g_thread_impl_vtable.CallThisOnThreadExit ();
1017 /* vim:set foldmethod=marker: */