/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* gthread.c: solaris thread system implementation
* Copyright 1998-2001 Sebastian Wilhelmi; University of Karlsruhe
* Copyright 2001 Hans Breuer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/* The GMutex and GCond implementations in this file are some of the
* lowest-level code in GLib. All other parts of GLib (messages,
* memory, slices, etc) assume that they can freely use these facilities
* without risking recursion.
*
* As such, these functions are NOT permitted to call any other part of
* GLib.
*
* The thread manipulation functions (create, exit, join, etc.) have
* more freedom -- they can do as they please.
*/
#include "config.h"
#include "glib.h"
#include "glib-init.h"
#include "gthread.h"
#include "gthreadprivate.h"
#include "gslice.h"
#include <windows.h>
#include <process.h>
#include <stdlib.h>
#include <stdio.h>
static void
g_thread_abort (gint status,
const gchar *function)
{
fprintf (stderr, "GLib (gthread-win32.c): Unexpected error from C library during '%s': %s. Aborting.\n",
strerror (status), function);
g_abort ();
}
/* Starting with Vista and Windows 2008, we have access to the
* CONDITION_VARIABLE and SRWLock primatives on Windows, which are
* pretty reasonable approximations of the primatives specified in
* POSIX 2001 (pthread_cond_t and pthread_mutex_t respectively).
*
* Both of these types are structs containing a single pointer. That
* pointer is used as an atomic bitfield to support user-space mutexes
* that only get the kernel involved in cases of contention (similar
* to how futex()-based mutexes work on Linux). The biggest advantage
* of these new types is that they can be statically initialised to
* zero. That means that they are completely ABI compatible with our
* GMutex and GCond APIs.
*
* Unfortunately, Windows XP lacks these facilities and GLib still
* needs to support Windows XP. Our approach here is as follows:
*
* - avoid depending on structure declarations at compile-time by
* declaring our own GMutex and GCond strutures to be
* ABI-compatible with SRWLock and CONDITION_VARIABLE and using
* those instead
*
* - avoid a hard dependency on the symbols used to manipulate these
* structures by doing a dynamic lookup of those symbols at
* runtime
*
* - if the symbols are not available, emulate them using other
* primatives
*
* Using this approach also allows us to easily build a GLib that lacks
* support for Windows XP or to remove this code entirely when XP is no
* longer supported (end of line is currently April 8, 2014).
*/
typedef struct
{
void (__stdcall * CallThisOnThreadExit) (void); /* fake */
void (__stdcall * InitializeSRWLock) (gpointer lock);
void (__stdcall * DeleteSRWLock) (gpointer lock); /* fake */
void (__stdcall * AcquireSRWLockExclusive) (gpointer lock);
BOOLEAN (__stdcall * TryAcquireSRWLockExclusive) (gpointer lock);
void (__stdcall * ReleaseSRWLockExclusive) (gpointer lock);
void (__stdcall * AcquireSRWLockShared) (gpointer lock);
BOOLEAN (__stdcall * TryAcquireSRWLockShared) (gpointer lock);
void (__stdcall * ReleaseSRWLockShared) (gpointer lock);
void (__stdcall * InitializeConditionVariable) (gpointer cond);
void (__stdcall * DeleteConditionVariable) (gpointer cond); /* fake */
BOOL (__stdcall * SleepConditionVariableSRW) (gpointer cond,
gpointer lock,
DWORD timeout,
ULONG flags);
void (__stdcall * WakeAllConditionVariable) (gpointer cond);
void (__stdcall * WakeConditionVariable) (gpointer cond);
} GThreadImplVtable;
static GThreadImplVtable g_thread_impl_vtable;
/* {{{1 GMutex */
void
g_mutex_init (GMutex *mutex)
{
g_thread_impl_vtable.InitializeSRWLock (mutex);
}
void
g_mutex_clear (GMutex *mutex)
{
if (g_thread_impl_vtable.DeleteSRWLock != NULL)
g_thread_impl_vtable.DeleteSRWLock (mutex);
}
void
g_mutex_lock (GMutex *mutex)
{
g_thread_impl_vtable.AcquireSRWLockExclusive (mutex);
}
gboolean
g_mutex_trylock (GMutex *mutex)
{
return g_thread_impl_vtable.TryAcquireSRWLockExclusive (mutex);
}
void
g_mutex_unlock (GMutex *mutex)
{
g_thread_impl_vtable.ReleaseSRWLockExclusive (mutex);
}
/* {{{1 GRecMutex */
static CRITICAL_SECTION *
g_rec_mutex_impl_new (void)
{
CRITICAL_SECTION *cs;
cs = g_slice_new (CRITICAL_SECTION);
InitializeCriticalSection (cs);
return cs;
}
static void
g_rec_mutex_impl_free (CRITICAL_SECTION *cs)
{
DeleteCriticalSection (cs);
g_slice_free (CRITICAL_SECTION, cs);
}
static CRITICAL_SECTION *
g_rec_mutex_get_impl (GRecMutex *mutex)
{
CRITICAL_SECTION *impl = mutex->p;
if G_UNLIKELY (mutex->p == NULL)
{
impl = g_rec_mutex_impl_new ();
if (InterlockedCompareExchangePointer (&mutex->p, impl, NULL) != NULL)
g_rec_mutex_impl_free (impl);
impl = mutex->p;
}
return impl;
}
void
g_rec_mutex_init (GRecMutex *mutex)
{
mutex->p = g_rec_mutex_impl_new ();
}
void
g_rec_mutex_clear (GRecMutex *mutex)
{
g_rec_mutex_impl_free (mutex->p);
}
void
g_rec_mutex_lock (GRecMutex *mutex)
{
EnterCriticalSection (g_rec_mutex_get_impl (mutex));
}
void
g_rec_mutex_unlock (GRecMutex *mutex)
{
LeaveCriticalSection (mutex->p);
}
gboolean
g_rec_mutex_trylock (GRecMutex *mutex)
{
return TryEnterCriticalSection (g_rec_mutex_get_impl (mutex));
}
/* {{{1 GRWLock */
void
g_rw_lock_init (GRWLock *lock)
{
g_thread_impl_vtable.InitializeSRWLock (lock);
}
void
g_rw_lock_clear (GRWLock *lock)
{
if (g_thread_impl_vtable.DeleteSRWLock != NULL)
g_thread_impl_vtable.DeleteSRWLock (lock);
}
void
g_rw_lock_writer_lock (GRWLock *lock)
{
g_thread_impl_vtable.AcquireSRWLockExclusive (lock);
}
gboolean
g_rw_lock_writer_trylock (GRWLock *lock)
{
return g_thread_impl_vtable.TryAcquireSRWLockExclusive (lock);
}
void
g_rw_lock_writer_unlock (GRWLock *lock)
{
g_thread_impl_vtable.ReleaseSRWLockExclusive (lock);
}
void
g_rw_lock_reader_lock (GRWLock *lock)
{
g_thread_impl_vtable.AcquireSRWLockShared (lock);
}
gboolean
g_rw_lock_reader_trylock (GRWLock *lock)
{
return g_thread_impl_vtable.TryAcquireSRWLockShared (lock);
}
void
g_rw_lock_reader_unlock (GRWLock *lock)
{
g_thread_impl_vtable.ReleaseSRWLockShared (lock);
}
/* {{{1 GCond */
void
g_cond_init (GCond *cond)
{
g_thread_impl_vtable.InitializeConditionVariable (cond);
}
void
g_cond_clear (GCond *cond)
{
if (g_thread_impl_vtable.DeleteConditionVariable)
g_thread_impl_vtable.DeleteConditionVariable (cond);
}
void
g_cond_signal (GCond *cond)
{
g_thread_impl_vtable.WakeConditionVariable (cond);
}
void
g_cond_broadcast (GCond *cond)
{
g_thread_impl_vtable.WakeAllConditionVariable (cond);
}
void
g_cond_wait (GCond *cond,
GMutex *entered_mutex)
{
g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, INFINITE, 0);
}
gboolean
g_cond_wait_until (GCond *cond,
GMutex *entered_mutex,
gint64 end_time)
{
gint64 span;
span = end_time - g_get_monotonic_time ();
if G_UNLIKELY (span < 0)
span = 0;
if G_UNLIKELY (span > G_GINT64_CONSTANT (1000) * G_MAXINT32)
span = INFINITE;
return g_thread_impl_vtable.SleepConditionVariableSRW (cond, entered_mutex, span / 1000, 0);
}
/* {{{1 GPrivate */
typedef struct _GPrivateDestructor GPrivateDestructor;
struct _GPrivateDestructor
{
DWORD index;
GDestroyNotify notify;
GPrivateDestructor *next;
};
static GPrivateDestructor * volatile g_private_destructors;
static CRITICAL_SECTION g_private_lock;
static DWORD
g_private_get_impl (GPrivate *key)
{
DWORD impl = (DWORD) key->p;
if G_UNLIKELY (impl == 0)
{
EnterCriticalSection (&g_private_lock);
impl = (DWORD) key->p;
if (impl == 0)
{
GPrivateDestructor *destructor;
impl = TlsAlloc ();
if (impl == TLS_OUT_OF_INDEXES)
g_thread_abort (0, "TlsAlloc");
if (key->notify != NULL)
{
destructor = malloc (sizeof (GPrivateDestructor));
if G_UNLIKELY (destructor == NULL)
g_thread_abort (errno, "malloc");
destructor->index = impl;
destructor->notify = key->notify;
destructor->next = g_private_destructors;
/* We need to do an atomic store due to the unlocked
* access to the destructor list from the thread exit
* function.
*
* It can double as a sanity check...
*/
if (InterlockedCompareExchangePointer (&g_private_destructors, destructor,
destructor->next) != destructor->next)
g_thread_abort (0, "g_private_get_impl(1)");
}
/* Ditto, due to the unlocked access on the fast path */
if (InterlockedCompareExchangePointer (&key->p, impl, NULL) != NULL)
g_thread_abort (0, "g_private_get_impl(2)");
}
LeaveCriticalSection (&g_private_lock);
}
return impl;
}
gpointer
g_private_get (GPrivate *key)
{
return TlsGetValue (g_private_get_impl (key));
}
void
g_private_set (GPrivate *key,
gpointer value)
{
TlsSetValue (g_private_get_impl (key), value);
}
void
g_private_replace (GPrivate *key,
gpointer value)
{
DWORD impl = g_private_get_impl (key);
gpointer old;
old = TlsGetValue (impl);
if (old && key->notify)
key->notify (old);
TlsSetValue (impl, value);
}
/* {{{1 GThread */
#define win32_check_for_error(what) G_STMT_START{ \
if (!(what)) \
g_error ("file %s: line %d (%s): error %s during %s", \
__FILE__, __LINE__, G_STRFUNC, \
g_win32_error_message (GetLastError ()), #what); \
}G_STMT_END
#define G_MUTEX_SIZE (sizeof (gpointer))
typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
typedef struct
{
GRealThread thread;
GThreadFunc proxy;
HANDLE handle;
} GThreadWin32;
void
g_system_thread_free (GRealThread *thread)
{
GThreadWin32 *wt = (GThreadWin32 *) thread;
win32_check_for_error (CloseHandle (wt->handle));
g_slice_free (GThreadWin32, wt);
}
void
g_system_thread_exit (void)
{
_endthreadex (0);
}
static guint __stdcall
g_thread_win32_proxy (gpointer data)
{
GThreadWin32 *self = data;
self->proxy (self);
g_system_thread_exit ();
g_assert_not_reached ();
return 0;
}
GRealThread *
g_system_thread_new (GThreadFunc func,
gulong stack_size,
GError **error)
{
GThreadWin32 *thread;
guint ignore;
thread = g_slice_new0 (GThreadWin32);
thread->proxy = func;
thread->handle = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_win32_proxy, thread, 0, &ignore);
if (thread->handle == NULL)
{
gchar *win_error = g_win32_error_message (GetLastError ());
g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
"Error creating thread: %s", win_error);
g_free (win_error);
g_slice_free (GThreadWin32, thread);
return NULL;
}
return (GRealThread *) thread;
}
void
g_thread_yield (void)
{
Sleep(0);
}
void
g_system_thread_wait (GRealThread *thread)
{
GThreadWin32 *wt = (GThreadWin32 *) thread;
win32_check_for_error (WAIT_FAILED != WaitForSingleObject (wt->handle, INFINITE));
}
#define EXCEPTION_SET_THREAD_NAME ((DWORD) 0x406D1388)
#ifndef _MSC_VER
static void *SetThreadName_VEH_handle = NULL;
static LONG __stdcall
SetThreadName_VEH (PEXCEPTION_POINTERS ExceptionInfo)
{
if (ExceptionInfo->ExceptionRecord != NULL &&
ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_SET_THREAD_NAME)
return EXCEPTION_CONTINUE_EXECUTION;
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
typedef struct _THREADNAME_INFO
{
DWORD dwType; /* must be 0x1000 */
LPCSTR szName; /* pointer to name (in user addr space) */
DWORD dwThreadID; /* thread ID (-1=caller thread) */
DWORD dwFlags; /* reserved for future use, must be zero */
} THREADNAME_INFO;
static void
SetThreadName (DWORD dwThreadID,
LPCSTR szThreadName)
{
THREADNAME_INFO info;
DWORD infosize;
info.dwType = 0x1000;
info.szName = szThreadName;
info.dwThreadID = dwThreadID;
info.dwFlags = 0;
infosize = sizeof (info) / sizeof (DWORD);
#ifdef _MSC_VER
__try
{
RaiseException (EXCEPTION_SET_THREAD_NAME, 0, infosize, (DWORD *) &info);
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
}
#else
/* Without a debugger we *must* have an exception handler,
* otherwise raising an exception will crash the process.
*/
if ((!IsDebuggerPresent ()) && (SetThreadName_VEH_handle == NULL))
return;
RaiseException (EXCEPTION_SET_THREAD_NAME, 0, infosize, (DWORD *) &info);
#endif
}
void
g_system_thread_set_name (const gchar *name)
{
SetThreadName ((DWORD) -1, name);
}
/* {{{1 SRWLock and CONDITION_VARIABLE emulation (for Windows XP) */
static CRITICAL_SECTION g_thread_xp_lock;
static DWORD g_thread_xp_waiter_tls;
/* {{{2 GThreadWaiter utility class for CONDITION_VARIABLE emulation */
typedef struct _GThreadXpWaiter GThreadXpWaiter;
struct _GThreadXpWaiter
{
HANDLE event;
volatile GThreadXpWaiter *next;
volatile GThreadXpWaiter **my_owner;
};
static GThreadXpWaiter *
g_thread_xp_waiter_get (void)
{
GThreadXpWaiter *waiter;
waiter = TlsGetValue (g_thread_xp_waiter_tls);
if G_UNLIKELY (waiter == NULL)
{
waiter = malloc (sizeof (GThreadXpWaiter));
if (waiter == NULL)
g_thread_abort (GetLastError (), "malloc");
waiter->event = CreateEvent (0, FALSE, FALSE, NULL);
if (waiter->event == NULL)
g_thread_abort (GetLastError (), "CreateEvent");
waiter->my_owner = NULL;
TlsSetValue (g_thread_xp_waiter_tls, waiter);
}
return waiter;
}
static void __stdcall
g_thread_xp_CallThisOnThreadExit (void)
{
GThreadXpWaiter *waiter;
waiter = TlsGetValue (g_thread_xp_waiter_tls);
if (waiter != NULL)
{
TlsSetValue (g_thread_xp_waiter_tls, NULL);
CloseHandle (waiter->event);
free (waiter);
}
}
/* {{{2 SRWLock emulation */
typedef struct
{
CRITICAL_SECTION writer_lock;
gboolean ever_shared; /* protected by writer_lock */
gboolean writer_locked; /* protected by writer_lock */
/* below is only ever touched if ever_shared becomes true */
CRITICAL_SECTION atomicity;
GThreadXpWaiter *queued_writer; /* protected by atomicity lock */
gint num_readers; /* protected by atomicity lock */
} GThreadSRWLock;
static void __stdcall
g_thread_xp_InitializeSRWLock (gpointer mutex)
{
*(GThreadSRWLock * volatile *) mutex = NULL;
}
static void __stdcall
g_thread_xp_DeleteSRWLock (gpointer mutex)
{
GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
if (lock)
{
if (lock->ever_shared)
DeleteCriticalSection (&lock->atomicity);
DeleteCriticalSection (&lock->writer_lock);
free (lock);
}
}
static GThreadSRWLock * __stdcall
g_thread_xp_get_srwlock (GThreadSRWLock * volatile *lock)
{
GThreadSRWLock *result;
/* It looks like we're missing some barriers here, but this code only
* ever runs on Windows XP, which in turn only ever runs on hardware
* with a relatively rigid memory model. The 'volatile' will take
* care of the compiler.
*/
result = *lock;
if G_UNLIKELY (result == NULL)
{
EnterCriticalSection (&g_thread_xp_lock);
/* Check again */
result = *lock;
if (result == NULL)
{
result = malloc (sizeof (GThreadSRWLock));
if (result == NULL)
g_thread_abort (errno, "malloc");
InitializeCriticalSection (&result->writer_lock);
result->writer_locked = FALSE;
result->ever_shared = FALSE;
*lock = result;
}
LeaveCriticalSection (&g_thread_xp_lock);
}
return result;
}
static void __stdcall
g_thread_xp_AcquireSRWLockExclusive (gpointer mutex)
{
GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
EnterCriticalSection (&lock->writer_lock);
/* CRITICAL_SECTION is reentrant, but SRWLock is not.
* Detect the deadlock that would occur on later Windows version.
*/
g_assert (!lock->writer_locked);
lock->writer_locked = TRUE;
if (lock->ever_shared)
{
GThreadXpWaiter *waiter = NULL;
EnterCriticalSection (&lock->atomicity);
if (lock->num_readers > 0)
lock->queued_writer = waiter = g_thread_xp_waiter_get ();
LeaveCriticalSection (&lock->atomicity);
if (waiter != NULL)
WaitForSingleObject (waiter->event, INFINITE);
lock->queued_writer = NULL;
}
}
static BOOLEAN __stdcall
g_thread_xp_TryAcquireSRWLockExclusive (gpointer mutex)
{
GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
if (!TryEnterCriticalSection (&lock->writer_lock))
return FALSE;
/* CRITICAL_SECTION is reentrant, but SRWLock is not.
* Ensure that this properly returns FALSE (as SRWLock would).
*/
if G_UNLIKELY (lock->writer_locked)
{
LeaveCriticalSection (&lock->writer_lock);
return FALSE;
}
lock->writer_locked = TRUE;
if (lock->ever_shared)
{
gboolean available;
EnterCriticalSection (&lock->atomicity);
available = lock->num_readers == 0;
LeaveCriticalSection (&lock->atomicity);
if (!available)
{
LeaveCriticalSection (&lock->writer_lock);
return FALSE;
}
}
return TRUE;
}
static void __stdcall
g_thread_xp_ReleaseSRWLockExclusive (gpointer mutex)
{
GThreadSRWLock *lock = *(GThreadSRWLock * volatile *) mutex;
lock->writer_locked = FALSE;
/* We need this until we fix some weird parts of GLib that try to
* unlock freshly-allocated mutexes.
*/
if (lock != NULL)
LeaveCriticalSection (&lock->writer_lock);
}
static void
g_thread_xp_srwlock_become_reader (GThreadSRWLock *lock)
{
if G_UNLIKELY (!lock->ever_shared)
{
InitializeCriticalSection (&lock->atomicity);
lock->queued_writer = NULL;
lock->num_readers = 0;
lock->ever_shared = TRUE;
}
EnterCriticalSection (&lock->atomicity);
lock->num_readers++;
LeaveCriticalSection (&lock->atomicity);
}
static void __stdcall
g_thread_xp_AcquireSRWLockShared (gpointer mutex)
{
GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
EnterCriticalSection (&lock->writer_lock);
/* See g_thread_xp_AcquireSRWLockExclusive */
g_assert (!lock->writer_locked);
g_thread_xp_srwlock_become_reader (lock);
LeaveCriticalSection (&lock->writer_lock);
}
static BOOLEAN __stdcall
g_thread_xp_TryAcquireSRWLockShared (gpointer mutex)
{
GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
if (!TryEnterCriticalSection (&lock->writer_lock))
return FALSE;
/* See g_thread_xp_AcquireSRWLockExclusive */
if G_UNLIKELY (lock->writer_locked)
{
LeaveCriticalSection (&lock->writer_lock);
return FALSE;
}
g_thread_xp_srwlock_become_reader (lock);
LeaveCriticalSection (&lock->writer_lock);
return TRUE;
}
static void __stdcall
g_thread_xp_ReleaseSRWLockShared (gpointer mutex)
{
GThreadSRWLock *lock = g_thread_xp_get_srwlock (mutex);
EnterCriticalSection (&lock->atomicity);
lock->num_readers--;
if (lock->num_readers == 0 && lock->queued_writer)
SetEvent (lock->queued_writer->event);
LeaveCriticalSection (&lock->atomicity);
}
/* {{{2 CONDITION_VARIABLE emulation */
typedef struct
{
volatile GThreadXpWaiter *first;
volatile GThreadXpWaiter **last_ptr;
} GThreadXpCONDITION_VARIABLE;
static void __stdcall
g_thread_xp_InitializeConditionVariable (gpointer cond)
{
*(GThreadXpCONDITION_VARIABLE * volatile *) cond = NULL;
}
static void __stdcall
g_thread_xp_DeleteConditionVariable (gpointer cond)
{
GThreadXpCONDITION_VARIABLE *cv = *(GThreadXpCONDITION_VARIABLE * volatile *) cond;
if (cv)
free (cv);
}
static GThreadXpCONDITION_VARIABLE * __stdcall
g_thread_xp_get_condition_variable (GThreadXpCONDITION_VARIABLE * volatile *cond)
{
GThreadXpCONDITION_VARIABLE *result;
/* It looks like we're missing some barriers here, but this code only
* ever runs on Windows XP, which in turn only ever runs on hardware
* with a relatively rigid memory model. The 'volatile' will take
* care of the compiler.
*/
result = *cond;
if G_UNLIKELY (result == NULL)
{
result = malloc (sizeof (GThreadXpCONDITION_VARIABLE));
if (result == NULL)
g_thread_abort (errno, "malloc");
result->first = NULL;
result->last_ptr = &result->first;
if (InterlockedCompareExchangePointer (cond, result, NULL) != NULL)
{
free (result);
result = *cond;
}
}
return result;
}
static BOOL __stdcall
g_thread_xp_SleepConditionVariableSRW (gpointer cond,
gpointer mutex,
DWORD timeout,
ULONG flags)
{
GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
GThreadXpWaiter *waiter = g_thread_xp_waiter_get ();
DWORD status;
waiter->next = NULL;
EnterCriticalSection (&g_thread_xp_lock);
waiter->my_owner = cv->last_ptr;
*cv->last_ptr = waiter;
cv->last_ptr = &waiter->next;
LeaveCriticalSection (&g_thread_xp_lock);
g_mutex_unlock (mutex);
status = WaitForSingleObject (waiter->event, timeout);
if (status != WAIT_TIMEOUT && status != WAIT_OBJECT_0)
g_thread_abort (GetLastError (), "WaitForSingleObject");
g_mutex_lock (mutex);
if (status == WAIT_TIMEOUT)
{
EnterCriticalSection (&g_thread_xp_lock);
if (waiter->my_owner)
{
if (waiter->next)
waiter->next->my_owner = waiter->my_owner;
else
cv->last_ptr = waiter->my_owner;
*waiter->my_owner = waiter->next;
waiter->my_owner = NULL;
}
LeaveCriticalSection (&g_thread_xp_lock);
}
return status == WAIT_OBJECT_0;
}
static void __stdcall
g_thread_xp_WakeConditionVariable (gpointer cond)
{
GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
volatile GThreadXpWaiter *waiter;
EnterCriticalSection (&g_thread_xp_lock);
waiter = cv->first;
if (waiter != NULL)
{
waiter->my_owner = NULL;
cv->first = waiter->next;
if (cv->first != NULL)
cv->first->my_owner = &cv->first;
else
cv->last_ptr = &cv->first;
}
if (waiter != NULL)
SetEvent (waiter->event);
LeaveCriticalSection (&g_thread_xp_lock);
}
static void __stdcall
g_thread_xp_WakeAllConditionVariable (gpointer cond)
{
GThreadXpCONDITION_VARIABLE *cv = g_thread_xp_get_condition_variable (cond);
volatile GThreadXpWaiter *waiter;
EnterCriticalSection (&g_thread_xp_lock);
waiter = cv->first;
cv->first = NULL;
cv->last_ptr = &cv->first;
while (waiter != NULL)
{
volatile GThreadXpWaiter *next;
next = waiter->next;
SetEvent (waiter->event);
waiter->my_owner = NULL;
waiter = next;
}
LeaveCriticalSection (&g_thread_xp_lock);
}
/* {{{2 XP Setup */
static void
g_thread_xp_init (void)
{
static const GThreadImplVtable g_thread_xp_impl_vtable = {
g_thread_xp_CallThisOnThreadExit,
g_thread_xp_InitializeSRWLock,
g_thread_xp_DeleteSRWLock,
g_thread_xp_AcquireSRWLockExclusive,
g_thread_xp_TryAcquireSRWLockExclusive,
g_thread_xp_ReleaseSRWLockExclusive,
g_thread_xp_AcquireSRWLockShared,
g_thread_xp_TryAcquireSRWLockShared,
g_thread_xp_ReleaseSRWLockShared,
g_thread_xp_InitializeConditionVariable,
g_thread_xp_DeleteConditionVariable,
g_thread_xp_SleepConditionVariableSRW,
g_thread_xp_WakeAllConditionVariable,
g_thread_xp_WakeConditionVariable
};
InitializeCriticalSection (&g_thread_xp_lock);
g_thread_xp_waiter_tls = TlsAlloc ();
g_thread_impl_vtable = g_thread_xp_impl_vtable;
}
/* {{{1 Epilogue */
static gboolean
g_thread_lookup_native_funcs (void)
{
GThreadImplVtable native_vtable = { 0, };
HMODULE kernel32;
kernel32 = GetModuleHandle ("KERNEL32.DLL");
if (kernel32 == NULL)
return FALSE;
#define GET_FUNC(name) if ((native_vtable.name = (void *) GetProcAddress (kernel32, #name)) == NULL) return FALSE
GET_FUNC(InitializeSRWLock);
GET_FUNC(AcquireSRWLockExclusive);
GET_FUNC(TryAcquireSRWLockExclusive);
GET_FUNC(ReleaseSRWLockExclusive);
GET_FUNC(AcquireSRWLockShared);
GET_FUNC(TryAcquireSRWLockShared);
GET_FUNC(ReleaseSRWLockShared);
GET_FUNC(InitializeConditionVariable);
GET_FUNC(SleepConditionVariableSRW);
GET_FUNC(WakeAllConditionVariable);
GET_FUNC(WakeConditionVariable);
#undef GET_FUNC
g_thread_impl_vtable = native_vtable;
return TRUE;
}
void
g_thread_win32_init (void)
{
if (!g_thread_lookup_native_funcs ())
g_thread_xp_init ();
InitializeCriticalSection (&g_private_lock);
#ifndef _MSC_VER
SetThreadName_VEH_handle = AddVectoredExceptionHandler (1, &SetThreadName_VEH);
if (SetThreadName_VEH_handle == NULL)
{
/* This is bad, but what can we do? */
}
#endif
}
void
g_thread_win32_thread_detach (void)
{
gboolean dtors_called;
do
{
GPrivateDestructor *dtor;
/* We go by the POSIX book on this one.
*
* If we call a destructor then there is a chance that some new
* TLS variables got set by code called in that destructor.
*
* Loop until nothing is left.
*/
dtors_called = FALSE;
for (dtor = g_private_destructors; dtor; dtor = dtor->next)
{
gpointer value;
value = TlsGetValue (dtor->index);
if (value != NULL && dtor->notify != NULL)
{
/* POSIX says to clear this before the call */
TlsSetValue (dtor->index, NULL);
dtor->notify (value);
dtors_called = TRUE;
}
}
}
while (dtors_called);
if (g_thread_impl_vtable.CallThisOnThreadExit)
g_thread_impl_vtable.CallThisOnThreadExit ();
}
void
g_thread_win32_process_detach (void)
{
#ifndef _MSC_VER
if (SetThreadName_VEH_handle != NULL)
{
RemoveVectoredExceptionHandler (SetThreadName_VEH_handle);
SetThreadName_VEH_handle = NULL;
}
#endif
}
/* vim:set foldmethod=marker: */