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_timedwait (GCond *cond,
305 GMutex *entered_mutex,
312 GetSystemTimeAsFileTime (&ft);
313 memmove (&now, &ft, sizeof (FILETIME));
315 now -= G_GINT64_CONSTANT (116444736000000000);
318 span = abs_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);
330 g_cond_timed_wait (GCond *cond,
331 GMutex *entered_mutex,
338 micros = abs_time->tv_sec;
340 micros += abs_time->tv_usec;
342 return g_cond_timedwait (cond, entered_mutex, micros);
346 g_cond_wait (cond, entered_mutex);
353 typedef struct _GPrivateDestructor GPrivateDestructor;
355 struct _GPrivateDestructor
358 GDestroyNotify notify;
359 GPrivateDestructor *next;
362 static GPrivateDestructor * volatile g_private_destructors;
363 static CRITICAL_SECTION g_private_lock;
366 g_private_get_impl (GPrivate *key)
368 DWORD impl = (DWORD) key->p;
370 if G_UNLIKELY (impl == 0)
372 EnterCriticalSection (&g_private_lock);
373 impl = (DWORD) key->p;
376 GPrivateDestructor *destructor;
380 if (impl == TLS_OUT_OF_INDEXES)
381 g_thread_abort (0, "TlsAlloc");
383 if (key->notify != NULL)
385 destructor = malloc (sizeof (GPrivateDestructor));
386 if G_UNLIKELY (destructor == NULL)
387 g_thread_abort (errno, "malloc");
388 destructor->index = impl;
389 destructor->notify = key->notify;
390 destructor->next = g_private_destructors;
392 /* We need to do an atomic store due to the unlocked
393 * access to the destructor list from the thread exit
396 * It can double as a sanity check...
398 if (InterlockedCompareExchangePointer (&g_private_destructors, destructor,
399 destructor->next) != destructor->next)
400 g_thread_abort (0, "g_private_get_impl(1)");
403 /* Ditto, due to the unlocked access on the fast path */
404 if (InterlockedCompareExchangePointer (&key->p, impl, NULL) != NULL)
405 g_thread_abort (0, "g_private_get_impl(2)");
407 LeaveCriticalSection (&g_private_lock);
414 g_private_get (GPrivate *key)
416 return TlsGetValue (g_private_get_impl (key));
420 g_private_set (GPrivate *key,
423 TlsSetValue (g_private_get_impl (key), value);
427 g_private_replace (GPrivate *key,
430 DWORD impl = g_private_get_impl (key);
433 old = TlsGetValue (impl);
434 if (old && key->notify)
436 TlsSetValue (impl, value);
442 #include "gthreadprivate.h"
444 #define win32_check_for_error(what) G_STMT_START{ \
446 g_error ("file %s: line %d (%s): error %s during %s", \
447 __FILE__, __LINE__, G_STRFUNC, \
448 g_win32_error_message (GetLastError ()), #what); \
451 #define G_MUTEX_SIZE (sizeof (gpointer))
453 static DWORD g_thread_self_tls;
455 typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
457 typedef struct _GThreadData GThreadData;
467 g_system_thread_free (GRealThread *thread)
469 g_slice_free (GRealThread, thread);
473 g_system_thread_exit (void)
478 static guint __stdcall
479 g_thread_proxy (gpointer data)
481 GThreadData *self = (GThreadData*) data;
483 win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
485 self->func (self->data);
487 g_system_thread_exit ();
489 g_assert_not_reached ();
495 g_system_thread_new (GThreadFunc func,
504 thread = g_slice_new0 (GRealThread);
505 retval = g_new(GThreadData, 1);
507 retval->data = thread;
509 retval->joinable = joinable;
511 retval->thread = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_proxy,
514 if (retval->thread == NULL)
516 gchar *win_error = g_win32_error_message (GetLastError ());
517 g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
518 "Error creating thread: %s", win_error);
521 g_slice_free (GRealThread, thread);
525 *(GThreadData **) &(thread->system_thread) = retval;
531 g_thread_yield (void)
537 g_system_thread_wait (GRealThread *thread)
539 GThreadData *target = *(GThreadData **)&(thread->system_thread);
541 g_return_if_fail (target->joinable);
543 win32_check_for_error (WAIT_FAILED !=
544 WaitForSingleObject (target->thread, INFINITE));
546 win32_check_for_error (CloseHandle (target->thread));
551 g_system_thread_set_name (const gchar *name)
553 /* FIXME: implement */
556 /* {{{1 SRWLock and CONDITION_VARIABLE emulation (for Windows XP) */
558 static CRITICAL_SECTION g_thread_xp_lock;
559 static DWORD g_thread_xp_waiter_tls;
561 /* {{{2 GThreadWaiter utility class for CONDITION_VARIABLE emulation */
562 typedef struct _GThreadXpWaiter GThreadXpWaiter;
563 struct _GThreadXpWaiter
566 volatile GThreadXpWaiter *next;
569 static GThreadXpWaiter *
570 g_thread_xp_waiter_get (void)
572 GThreadXpWaiter *waiter;
574 waiter = TlsGetValue (g_thread_xp_waiter_tls);
576 if G_UNLIKELY (waiter == NULL)
578 waiter = malloc (sizeof (GThreadXpWaiter));
580 g_thread_abort (GetLastError (), "malloc");
581 waiter->event = CreateEvent (0, FALSE, FALSE, NULL);
582 if (waiter->event == NULL)
583 g_thread_abort (GetLastError (), "CreateEvent");
585 TlsSetValue (g_thread_xp_waiter_tls, waiter);
591 static void __stdcall
592 g_thread_xp_CallThisOnThreadExit (void)
594 GThreadXpWaiter *waiter;
596 waiter = TlsGetValue (g_thread_xp_waiter_tls);
600 TlsSetValue (g_thread_xp_waiter_tls, NULL);
601 CloseHandle (waiter->event);
606 /* {{{2 SRWLock emulation */
609 CRITICAL_SECTION writer_lock;
610 gboolean ever_shared; /* protected by writer_lock */
611 gboolean writer_locked; /* protected by writer_lock */
613 /* below is only ever touched if ever_shared becomes true */
614 CRITICAL_SECTION atomicity;
615 GThreadXpWaiter *queued_writer; /* protected by atomicity lock */
616 gint num_readers; /* protected by atomicity lock */
619 static void __stdcall
620 g_thread_xp_InitializeSRWLock (gpointer mutex)
622 *(GThreadSRWLock * volatile *) mutex = NULL;
625 static void __stdcall
626 g_thread_xp_DeleteSRWLock (gpointer mutex)
628 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
632 if (lock->ever_shared)
633 DeleteCriticalSection (&lock->atomicity);
635 DeleteCriticalSection (&lock->writer_lock);
640 static GThreadSRWLock * __stdcall
641 g_thread_xp_get_srwlock (GThreadSRWLock * volatile *lock)
643 GThreadSRWLock *result;
645 /* It looks like we're missing some barriers here, but this code only
646 * ever runs on Windows XP, which in turn only ever runs on hardware
647 * with a relatively rigid memory model. The 'volatile' will take
648 * care of the compiler.
652 if G_UNLIKELY (result == NULL)
654 EnterCriticalSection (&g_thread_xp_lock);
656 result = malloc (sizeof (GThreadSRWLock));
659 g_thread_abort (errno, "malloc");
661 InitializeCriticalSection (&result->writer_lock);
662 result->writer_locked = FALSE;
663 result->ever_shared = FALSE;
666 LeaveCriticalSection (&g_thread_xp_lock);
672 static void __stdcall
673 g_thread_xp_AcquireSRWLockExclusive (gpointer mutex)
675 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
677 EnterCriticalSection (&lock->writer_lock);
679 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
680 * Detect the deadlock that would occur on later Windows version.
682 g_assert (!lock->writer_locked);
683 lock->writer_locked = TRUE;
685 if (lock->ever_shared)
687 GThreadXpWaiter *waiter = NULL;
689 EnterCriticalSection (&lock->atomicity);
690 if (lock->num_readers > 0)
691 lock->queued_writer = waiter = g_thread_xp_waiter_get ();
692 LeaveCriticalSection (&lock->atomicity);
695 WaitForSingleObject (waiter->event, INFINITE);
697 lock->queued_writer = NULL;
701 static BOOLEAN __stdcall
702 g_thread_xp_TryAcquireSRWLockExclusive (gpointer mutex)
704 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
706 if (!TryEnterCriticalSection (&lock->writer_lock))
709 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
710 * Ensure that this properly returns FALSE (as SRWLock would).
712 if G_UNLIKELY (lock->writer_locked)
714 LeaveCriticalSection (&lock->writer_lock);
718 lock->writer_locked = TRUE;
720 if (lock->ever_shared)
724 EnterCriticalSection (&lock->atomicity);
725 available = lock->num_readers == 0;
726 LeaveCriticalSection (&lock->atomicity);
730 LeaveCriticalSection (&lock->writer_lock);
738 static void __stdcall
739 g_thread_xp_ReleaseSRWLockExclusive (gpointer mutex)
741 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
743 lock->writer_locked = FALSE;
745 /* We need this until we fix some weird parts of GLib that try to
746 * unlock freshly-allocated mutexes.
749 LeaveCriticalSection (&lock->writer_lock);
753 g_thread_xp_srwlock_become_reader (GThreadSRWLock *lock)
755 if G_UNLIKELY (!lock->ever_shared)
757 InitializeCriticalSection (&lock->atomicity);
758 lock->queued_writer = NULL;
759 lock->num_readers = 0;
761 lock->ever_shared = TRUE;
764 EnterCriticalSection (&lock->atomicity);
766 LeaveCriticalSection (&lock->atomicity);
769 static void __stdcall
770 g_thread_xp_AcquireSRWLockShared (gpointer mutex)
772 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
774 EnterCriticalSection (&lock->writer_lock);
776 /* See g_thread_xp_AcquireSRWLockExclusive */
777 g_assert (!lock->writer_locked);
779 g_thread_xp_srwlock_become_reader (lock);
781 LeaveCriticalSection (&lock->writer_lock);
784 static BOOLEAN __stdcall
785 g_thread_xp_TryAcquireSRWLockShared (gpointer mutex)
787 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
789 if (!TryEnterCriticalSection (&lock->writer_lock))
792 /* See g_thread_xp_AcquireSRWLockExclusive */
793 if G_UNLIKELY (lock->writer_locked)
795 LeaveCriticalSection (&lock->writer_lock);
799 g_thread_xp_srwlock_become_reader (lock);
801 LeaveCriticalSection (&lock->writer_lock);
806 static void __stdcall
807 g_thread_xp_ReleaseSRWLockShared (gpointer mutex)
809 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
811 EnterCriticalSection (&lock->atomicity);
815 if (lock->num_readers == 0 && lock->queued_writer)
816 SetEvent (lock->queued_writer->event);
818 LeaveCriticalSection (&lock->atomicity);
821 /* {{{2 CONDITION_VARIABLE emulation */
824 volatile GThreadXpWaiter *first;
825 volatile GThreadXpWaiter **last_ptr;
826 } GThreadXpCONDITION_VARIABLE;
828 static void __stdcall
829 g_thread_xp_InitializeConditionVariable (gpointer cond)
831 *(GThreadXpCONDITION_VARIABLE * volatile *) cond = NULL;
834 static void __stdcall
835 g_thread_xp_DeleteConditionVariable (gpointer cond)
837 GThreadXpCONDITION_VARIABLE *cv = *(GThreadXpCONDITION_VARIABLE * volatile *) cond;
843 static GThreadXpCONDITION_VARIABLE * __stdcall
844 g_thread_xp_get_condition_variable (GThreadXpCONDITION_VARIABLE * volatile *cond)
846 GThreadXpCONDITION_VARIABLE *result;
848 /* It looks like we're missing some barriers here, but this code only
849 * ever runs on Windows XP, which in turn only ever runs on hardware
850 * with a relatively rigid memory model. The 'volatile' will take
851 * care of the compiler.
855 if G_UNLIKELY (result == NULL)
857 result = malloc (sizeof (GThreadXpCONDITION_VARIABLE));
860 g_thread_abort (errno, "malloc");
862 result->first = NULL;
863 result->last_ptr = &result->first;
865 if (InterlockedCompareExchangePointer (cond, result, NULL) != NULL)
875 static BOOL __stdcall
876 g_thread_xp_SleepConditionVariableSRW (gpointer cond,
881 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
882 GThreadXpWaiter *waiter = g_thread_xp_waiter_get ();
887 EnterCriticalSection (&g_thread_xp_lock);
888 *cv->last_ptr = waiter;
889 cv->last_ptr = &waiter->next;
890 LeaveCriticalSection (&g_thread_xp_lock);
892 g_mutex_unlock (mutex);
893 status = WaitForSingleObject (waiter->event, timeout);
895 if (status != WAIT_TIMEOUT && status != WAIT_OBJECT_0)
896 g_thread_abort (GetLastError (), "WaitForSingleObject");
898 g_mutex_lock (mutex);
900 return status == WAIT_OBJECT_0;
903 static void __stdcall
904 g_thread_xp_WakeConditionVariable (gpointer cond)
906 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
907 volatile GThreadXpWaiter *waiter;
909 EnterCriticalSection (&g_thread_xp_lock);
913 cv->first = waiter->next;
914 if (cv->first == NULL)
915 cv->last_ptr = &cv->first;
917 LeaveCriticalSection (&g_thread_xp_lock);
920 SetEvent (waiter->event);
923 static void __stdcall
924 g_thread_xp_WakeAllConditionVariable (gpointer cond)
926 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
927 volatile GThreadXpWaiter *waiter;
929 EnterCriticalSection (&g_thread_xp_lock);
932 cv->last_ptr = &cv->first;
933 LeaveCriticalSection (&g_thread_xp_lock);
935 while (waiter != NULL)
937 volatile GThreadXpWaiter *next;
940 SetEvent (waiter->event);
947 g_thread_xp_init (void)
949 static const GThreadImplVtable g_thread_xp_impl_vtable = {
950 g_thread_xp_CallThisOnThreadExit,
951 g_thread_xp_InitializeSRWLock,
952 g_thread_xp_DeleteSRWLock,
953 g_thread_xp_AcquireSRWLockExclusive,
954 g_thread_xp_TryAcquireSRWLockExclusive,
955 g_thread_xp_ReleaseSRWLockExclusive,
956 g_thread_xp_AcquireSRWLockShared,
957 g_thread_xp_TryAcquireSRWLockShared,
958 g_thread_xp_ReleaseSRWLockShared,
959 g_thread_xp_InitializeConditionVariable,
960 g_thread_xp_DeleteConditionVariable,
961 g_thread_xp_SleepConditionVariableSRW,
962 g_thread_xp_WakeAllConditionVariable,
963 g_thread_xp_WakeConditionVariable
966 InitializeCriticalSection (&g_thread_xp_lock);
967 g_thread_xp_waiter_tls = TlsAlloc ();
969 g_thread_impl_vtable = g_thread_xp_impl_vtable;
975 g_thread_lookup_native_funcs (void)
977 GThreadImplVtable native_vtable = { 0, };
980 kernel32 = GetModuleHandle ("KERNEL32.DLL");
982 if (kernel32 == NULL)
985 #define GET_FUNC(name) if ((native_vtable.name = (void *) GetProcAddress (kernel32, #name)) == NULL) return FALSE
986 GET_FUNC(InitializeSRWLock);
987 GET_FUNC(AcquireSRWLockExclusive);
988 GET_FUNC(TryAcquireSRWLockExclusive);
989 GET_FUNC(ReleaseSRWLockExclusive);
990 GET_FUNC(AcquireSRWLockShared);
991 GET_FUNC(TryAcquireSRWLockShared);
992 GET_FUNC(ReleaseSRWLockShared);
994 GET_FUNC(InitializeConditionVariable);
995 GET_FUNC(SleepConditionVariableSRW);
996 GET_FUNC(WakeAllConditionVariable);
997 GET_FUNC(WakeConditionVariable);
1000 g_thread_impl_vtable = native_vtable;
1005 G_GNUC_INTERNAL void
1006 g_thread_win32_init (void)
1008 if (g_thread_lookup_native_funcs ())
1009 fprintf (stderr, "(debug) GThread using native mode\n");
1012 fprintf (stderr, "(debug) GThread using Windows XP mode\n");
1013 g_thread_xp_init ();
1016 win32_check_for_error (TLS_OUT_OF_INDEXES != (g_thread_self_tls = TlsAlloc ()));
1017 InitializeCriticalSection (&g_private_lock);
1020 G_GNUC_INTERNAL void
1021 g_thread_win32_thread_detach (void)
1023 GThreadData *self = TlsGetValue (g_thread_self_tls);
1024 gboolean dtors_called;
1028 GPrivateDestructor *dtor;
1030 /* We go by the POSIX book on this one.
1032 * If we call a destructor then there is a chance that some new
1033 * TLS variables got set by code called in that destructor.
1035 * Loop until nothing is left.
1037 dtors_called = FALSE;
1039 for (dtor = g_private_destructors; dtor; dtor = dtor->next)
1043 value = TlsGetValue (dtor->index);
1044 if (value != NULL && dtor->notify != NULL)
1046 /* POSIX says to clear this before the call */
1047 TlsSetValue (dtor->index, NULL);
1048 dtor->notify (value);
1049 dtors_called = TRUE;
1053 while (dtors_called);
1057 if (!self->joinable)
1059 win32_check_for_error (CloseHandle (self->thread));
1062 win32_check_for_error (TlsSetValue (g_thread_self_tls, NULL));
1065 if (g_thread_impl_vtable.CallThisOnThreadExit)
1066 g_thread_impl_vtable.CallThisOnThreadExit ();
1069 /* vim:set foldmethod=marker: */