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_self (gpointer thread)
469 GThreadData *self = TlsGetValue (g_thread_self_tls);
473 /* This should only happen for the main thread! */
474 HANDLE handle = GetCurrentThread ();
475 HANDLE process = GetCurrentProcess ();
476 self = g_new (GThreadData, 1);
477 win32_check_for_error (DuplicateHandle (process, handle, process,
478 &self->thread, 0, FALSE,
479 DUPLICATE_SAME_ACCESS));
480 win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
483 self->joinable = FALSE;
486 *(GThreadData **)thread = self;
490 g_system_thread_exit (void)
495 static guint __stdcall
496 g_thread_proxy (gpointer data)
498 GThreadData *self = (GThreadData*) data;
500 win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
502 self->func (self->data);
504 g_system_thread_exit ();
506 g_assert_not_reached ();
512 g_system_thread_create (GThreadFunc func,
522 g_return_if_fail (func);
524 retval = g_new(GThreadData, 1);
528 retval->joinable = joinable;
530 retval->thread = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_proxy,
533 if (retval->thread == NULL)
535 gchar *win_error = g_win32_error_message (GetLastError ());
536 g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
537 "Error creating thread: %s", win_error);
543 *(GThreadData **)thread = retval;
547 g_thread_yield (void)
553 g_system_thread_join (gpointer thread)
555 GThreadData *target = *(GThreadData **)thread;
557 g_return_if_fail (target->joinable);
559 win32_check_for_error (WAIT_FAILED !=
560 WaitForSingleObject (target->thread, INFINITE));
562 win32_check_for_error (CloseHandle (target->thread));
567 g_system_thread_set_name (const gchar *name)
569 /* FIXME: implement */
572 /* {{{1 SRWLock and CONDITION_VARIABLE emulation (for Windows XP) */
574 static CRITICAL_SECTION g_thread_xp_lock;
575 static DWORD g_thread_xp_waiter_tls;
577 /* {{{2 GThreadWaiter utility class for CONDITION_VARIABLE emulation */
578 typedef struct _GThreadXpWaiter GThreadXpWaiter;
579 struct _GThreadXpWaiter
582 volatile GThreadXpWaiter *next;
585 static GThreadXpWaiter *
586 g_thread_xp_waiter_get (void)
588 GThreadXpWaiter *waiter;
590 waiter = TlsGetValue (g_thread_xp_waiter_tls);
592 if G_UNLIKELY (waiter == NULL)
594 waiter = malloc (sizeof (GThreadXpWaiter));
596 g_thread_abort (GetLastError (), "malloc");
597 waiter->event = CreateEvent (0, FALSE, FALSE, NULL);
598 if (waiter->event == NULL)
599 g_thread_abort (GetLastError (), "CreateEvent");
601 TlsSetValue (g_thread_xp_waiter_tls, waiter);
607 static void __stdcall
608 g_thread_xp_CallThisOnThreadExit (void)
610 GThreadXpWaiter *waiter;
612 waiter = TlsGetValue (g_thread_xp_waiter_tls);
616 TlsSetValue (g_thread_xp_waiter_tls, NULL);
617 CloseHandle (waiter->event);
622 /* {{{2 SRWLock emulation */
625 CRITICAL_SECTION writer_lock;
626 gboolean ever_shared; /* protected by writer_lock */
627 gboolean writer_locked; /* protected by writer_lock */
629 /* below is only ever touched if ever_shared becomes true */
630 CRITICAL_SECTION atomicity;
631 GThreadXpWaiter *queued_writer; /* protected by atomicity lock */
632 gint num_readers; /* protected by atomicity lock */
635 static void __stdcall
636 g_thread_xp_InitializeSRWLock (gpointer mutex)
638 *(GThreadSRWLock * volatile *) mutex = NULL;
641 static void __stdcall
642 g_thread_xp_DeleteSRWLock (gpointer mutex)
644 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
648 if (lock->ever_shared)
649 DeleteCriticalSection (&lock->atomicity);
651 DeleteCriticalSection (&lock->writer_lock);
656 static GThreadSRWLock * __stdcall
657 g_thread_xp_get_srwlock (GThreadSRWLock * volatile *lock)
659 GThreadSRWLock *result;
661 /* It looks like we're missing some barriers here, but this code only
662 * ever runs on Windows XP, which in turn only ever runs on hardware
663 * with a relatively rigid memory model. The 'volatile' will take
664 * care of the compiler.
668 if G_UNLIKELY (result == NULL)
670 EnterCriticalSection (&g_thread_xp_lock);
672 result = malloc (sizeof (GThreadSRWLock));
675 g_thread_abort (errno, "malloc");
677 InitializeCriticalSection (&result->writer_lock);
678 result->writer_locked = FALSE;
679 result->ever_shared = FALSE;
682 LeaveCriticalSection (&g_thread_xp_lock);
688 static void __stdcall
689 g_thread_xp_AcquireSRWLockExclusive (gpointer mutex)
691 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
693 EnterCriticalSection (&lock->writer_lock);
695 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
696 * Detect the deadlock that would occur on later Windows version.
698 g_assert (!lock->writer_locked);
699 lock->writer_locked = TRUE;
701 if (lock->ever_shared)
703 GThreadXpWaiter *waiter = NULL;
705 EnterCriticalSection (&lock->atomicity);
706 if (lock->num_readers > 0)
707 lock->queued_writer = waiter = g_thread_xp_waiter_get ();
708 LeaveCriticalSection (&lock->atomicity);
711 WaitForSingleObject (waiter->event, INFINITE);
713 lock->queued_writer = NULL;
717 static BOOLEAN __stdcall
718 g_thread_xp_TryAcquireSRWLockExclusive (gpointer mutex)
720 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
722 if (!TryEnterCriticalSection (&lock->writer_lock))
725 /* CRITICAL_SECTION is reentrant, but SRWLock is not.
726 * Ensure that this properly returns FALSE (as SRWLock would).
728 if G_UNLIKELY (lock->writer_locked)
730 LeaveCriticalSection (&lock->writer_lock);
734 lock->writer_locked = TRUE;
736 if (lock->ever_shared)
740 EnterCriticalSection (&lock->atomicity);
741 available = lock->num_readers == 0;
742 LeaveCriticalSection (&lock->atomicity);
746 LeaveCriticalSection (&lock->writer_lock);
754 static void __stdcall
755 g_thread_xp_ReleaseSRWLockExclusive (gpointer mutex)
757 GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
759 lock->writer_locked = FALSE;
761 /* We need this until we fix some weird parts of GLib that try to
762 * unlock freshly-allocated mutexes.
765 LeaveCriticalSection (&lock->writer_lock);
769 g_thread_xp_srwlock_become_reader (GThreadSRWLock *lock)
771 if G_UNLIKELY (!lock->ever_shared)
773 InitializeCriticalSection (&lock->atomicity);
774 lock->queued_writer = NULL;
775 lock->num_readers = 0;
777 lock->ever_shared = TRUE;
780 EnterCriticalSection (&lock->atomicity);
782 LeaveCriticalSection (&lock->atomicity);
785 static void __stdcall
786 g_thread_xp_AcquireSRWLockShared (gpointer mutex)
788 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
790 EnterCriticalSection (&lock->writer_lock);
792 /* See g_thread_xp_AcquireSRWLockExclusive */
793 g_assert (!lock->writer_locked);
795 g_thread_xp_srwlock_become_reader (lock);
797 LeaveCriticalSection (&lock->writer_lock);
800 static BOOLEAN __stdcall
801 g_thread_xp_TryAcquireSRWLockShared (gpointer mutex)
803 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
805 if (!TryEnterCriticalSection (&lock->writer_lock))
808 /* See g_thread_xp_AcquireSRWLockExclusive */
809 if G_UNLIKELY (lock->writer_locked)
811 LeaveCriticalSection (&lock->writer_lock);
815 g_thread_xp_srwlock_become_reader (lock);
817 LeaveCriticalSection (&lock->writer_lock);
822 static void __stdcall
823 g_thread_xp_ReleaseSRWLockShared (gpointer mutex)
825 GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
827 EnterCriticalSection (&lock->atomicity);
831 if (lock->num_readers == 0 && lock->queued_writer)
832 SetEvent (lock->queued_writer->event);
834 LeaveCriticalSection (&lock->atomicity);
837 /* {{{2 CONDITION_VARIABLE emulation */
840 volatile GThreadXpWaiter *first;
841 volatile GThreadXpWaiter **last_ptr;
842 } GThreadXpCONDITION_VARIABLE;
844 static void __stdcall
845 g_thread_xp_InitializeConditionVariable (gpointer cond)
847 *(GThreadXpCONDITION_VARIABLE * volatile *) cond = NULL;
850 static void __stdcall
851 g_thread_xp_DeleteConditionVariable (gpointer cond)
853 GThreadXpCONDITION_VARIABLE *cv = *(GThreadXpCONDITION_VARIABLE * volatile *) cond;
859 static GThreadXpCONDITION_VARIABLE * __stdcall
860 g_thread_xp_get_condition_variable (GThreadXpCONDITION_VARIABLE * volatile *cond)
862 GThreadXpCONDITION_VARIABLE *result;
864 /* It looks like we're missing some barriers here, but this code only
865 * ever runs on Windows XP, which in turn only ever runs on hardware
866 * with a relatively rigid memory model. The 'volatile' will take
867 * care of the compiler.
871 if G_UNLIKELY (result == NULL)
873 result = malloc (sizeof (GThreadXpCONDITION_VARIABLE));
876 g_thread_abort (errno, "malloc");
878 result->first = NULL;
879 result->last_ptr = &result->first;
881 if (InterlockedCompareExchangePointer (cond, result, NULL) != NULL)
891 static BOOL __stdcall
892 g_thread_xp_SleepConditionVariableSRW (gpointer cond,
897 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
898 GThreadXpWaiter *waiter = g_thread_xp_waiter_get ();
903 EnterCriticalSection (&g_thread_xp_lock);
904 *cv->last_ptr = waiter;
905 cv->last_ptr = &waiter->next;
906 LeaveCriticalSection (&g_thread_xp_lock);
908 g_mutex_unlock (mutex);
909 status = WaitForSingleObject (waiter->event, timeout);
911 if (status != WAIT_TIMEOUT && status != WAIT_OBJECT_0)
912 g_thread_abort (GetLastError (), "WaitForSingleObject");
914 g_mutex_lock (mutex);
916 return status == WAIT_OBJECT_0;
919 static void __stdcall
920 g_thread_xp_WakeConditionVariable (gpointer cond)
922 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
923 volatile GThreadXpWaiter *waiter;
925 EnterCriticalSection (&g_thread_xp_lock);
929 cv->first = waiter->next;
930 if (cv->first == NULL)
931 cv->last_ptr = &cv->first;
933 LeaveCriticalSection (&g_thread_xp_lock);
936 SetEvent (waiter->event);
939 static void __stdcall
940 g_thread_xp_WakeAllConditionVariable (gpointer cond)
942 GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
943 volatile GThreadXpWaiter *waiter;
945 EnterCriticalSection (&g_thread_xp_lock);
948 cv->last_ptr = &cv->first;
949 LeaveCriticalSection (&g_thread_xp_lock);
951 while (waiter != NULL)
953 volatile GThreadXpWaiter *next;
956 SetEvent (waiter->event);
963 g_thread_xp_init (void)
965 static const GThreadImplVtable g_thread_xp_impl_vtable = {
966 g_thread_xp_CallThisOnThreadExit,
967 g_thread_xp_InitializeSRWLock,
968 g_thread_xp_DeleteSRWLock,
969 g_thread_xp_AcquireSRWLockExclusive,
970 g_thread_xp_TryAcquireSRWLockExclusive,
971 g_thread_xp_ReleaseSRWLockExclusive,
972 g_thread_xp_AcquireSRWLockShared,
973 g_thread_xp_TryAcquireSRWLockShared,
974 g_thread_xp_ReleaseSRWLockShared,
975 g_thread_xp_InitializeConditionVariable,
976 g_thread_xp_DeleteConditionVariable,
977 g_thread_xp_SleepConditionVariableSRW,
978 g_thread_xp_WakeAllConditionVariable,
979 g_thread_xp_WakeConditionVariable
982 InitializeCriticalSection (&g_thread_xp_lock);
983 g_thread_xp_waiter_tls = TlsAlloc ();
985 g_thread_impl_vtable = g_thread_xp_impl_vtable;
991 g_thread_lookup_native_funcs (void)
993 GThreadImplVtable native_vtable = { 0, };
996 kernel32 = GetModuleHandle ("KERNEL32.DLL");
998 if (kernel32 == NULL)
1001 #define GET_FUNC(name) if ((native_vtable.name = (void *) GetProcAddress (kernel32, #name)) == NULL) return FALSE
1002 GET_FUNC(InitializeSRWLock);
1003 GET_FUNC(AcquireSRWLockExclusive);
1004 GET_FUNC(TryAcquireSRWLockExclusive);
1005 GET_FUNC(ReleaseSRWLockExclusive);
1006 GET_FUNC(AcquireSRWLockShared);
1007 GET_FUNC(TryAcquireSRWLockShared);
1008 GET_FUNC(ReleaseSRWLockShared);
1010 GET_FUNC(InitializeConditionVariable);
1011 GET_FUNC(SleepConditionVariableSRW);
1012 GET_FUNC(WakeAllConditionVariable);
1013 GET_FUNC(WakeConditionVariable);
1016 g_thread_impl_vtable = native_vtable;
1021 G_GNUC_INTERNAL void
1022 g_thread_win32_init (void)
1024 if (g_thread_lookup_native_funcs ())
1025 fprintf (stderr, "(debug) GThread using native mode\n");
1028 fprintf (stderr, "(debug) GThread using Windows XP mode\n");
1029 g_thread_xp_init ();
1032 win32_check_for_error (TLS_OUT_OF_INDEXES != (g_thread_self_tls = TlsAlloc ()));
1033 InitializeCriticalSection (&g_private_lock);
1036 G_GNUC_INTERNAL void
1037 g_thread_win32_thread_detach (void)
1039 GThreadData *self = TlsGetValue (g_thread_self_tls);
1040 gboolean dtors_called;
1044 GPrivateDestructor *dtor;
1046 /* We go by the POSIX book on this one.
1048 * If we call a destructor then there is a chance that some new
1049 * TLS variables got set by code called in that destructor.
1051 * Loop until nothing is left.
1053 dtors_called = FALSE;
1055 for (dtor = g_private_destructors; dtor; dtor = dtor->next)
1059 value = TlsGetValue (dtor->index);
1060 if (value != NULL && dtor->notify != NULL)
1062 /* POSIX says to clear this before the call */
1063 TlsSetValue (dtor->index, NULL);
1064 dtor->notify (value);
1065 dtors_called = TRUE;
1069 while (dtors_called);
1073 if (!self->joinable)
1075 win32_check_for_error (CloseHandle (self->thread));
1078 win32_check_for_error (TlsSetValue (g_thread_self_tls, NULL));
1081 if (g_thread_impl_vtable.CallThisOnThreadExit)
1082 g_thread_impl_vtable.CallThisOnThreadExit ();
1085 /* vim:set foldmethod=marker: */