* Copyright 1998-2001 Sebastian Wilhelmi; University of Karlsruhe
* Copyright 2001 Hans Breuer
*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
* 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 of the License, or (at your option) any later version.
+ * 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
* 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
-/*
- * MT safe
+/* 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"
-#define STRICT
-#define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
#include <windows.h>
-#undef STRICT
#include <process.h>
#include <stdlib.h>
#include <stdio.h>
-#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))
-
-static DWORD g_thread_self_tls;
-static DWORD g_private_tls;
-static DWORD g_cond_event_tls;
-static CRITICAL_SECTION g_thread_global_spinlock;
+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 ();
+}
-typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
+/* Starting with Vista and Windows 2008, we have access to the
+ * CONDITION_VARIABLE and SRWLock primitives on Windows, which are
+ * pretty reasonable approximations of the primitives 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.
+ */
-/* As noted in the docs, GPrivate is a limited resource, here we take
- * a rather low maximum to save memory, use GStaticPrivate instead. */
-#define G_PRIVATE_MAX 100
+/* {{{1 GMutex */
+void
+g_mutex_init (GMutex *mutex)
+{
+ InitializeSRWLock ((gpointer) mutex);
+}
-static GDestroyNotify g_private_destructors[G_PRIVATE_MAX];
+void
+g_mutex_clear (GMutex *mutex)
+{
+}
-static guint g_private_next = 0;
+void
+g_mutex_lock (GMutex *mutex)
+{
+ AcquireSRWLockExclusive ((gpointer) mutex);
+}
-typedef struct _GThreadData GThreadData;
-struct _GThreadData
+gboolean
+g_mutex_trylock (GMutex *mutex)
{
- GThreadFunc func;
- gpointer data;
- HANDLE thread;
- gboolean joinable;
-};
+ return TryAcquireSRWLockExclusive ((gpointer) mutex);
+}
-struct _GCond
+void
+g_mutex_unlock (GMutex *mutex)
{
- GPtrArray *array;
- CRITICAL_SECTION lock;
-};
+ ReleaseSRWLockExclusive ((gpointer) mutex);
+}
-static GMutex *
-g_mutex_new_win32_impl (void)
+/* {{{1 GRecMutex */
+
+static CRITICAL_SECTION *
+g_rec_mutex_impl_new (void)
{
- CRITICAL_SECTION *cs = g_new (CRITICAL_SECTION, 1);
- gpointer *retval = g_new (gpointer, 1);
+ CRITICAL_SECTION *cs;
+ cs = g_slice_new (CRITICAL_SECTION);
InitializeCriticalSection (cs);
- *retval = cs;
- return (GMutex *) retval;
+
+ return cs;
}
static void
-g_mutex_free_win32_impl (GMutex *mutex)
+g_rec_mutex_impl_free (CRITICAL_SECTION *cs)
{
- gpointer *ptr = (gpointer *) mutex;
- CRITICAL_SECTION *cs = (CRITICAL_SECTION *) *ptr;
-
DeleteCriticalSection (cs);
- g_free (cs);
- g_free (mutex);
+ g_slice_free (CRITICAL_SECTION, cs);
}
-/* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use
- functions from gmem.c and gmessages.c; */
-
-static void
-g_mutex_lock_win32_impl (GMutex *mutex)
+static CRITICAL_SECTION *
+g_rec_mutex_get_impl (GRecMutex *mutex)
{
- EnterCriticalSection (*(CRITICAL_SECTION **)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;
}
-static gboolean
-g_mutex_trylock_win32_impl (GMutex * mutex)
+void
+g_rec_mutex_init (GRecMutex *mutex)
{
- return TryEnterCriticalSection (*(CRITICAL_SECTION **)mutex);
+ mutex->p = g_rec_mutex_impl_new ();
}
-static void
-g_mutex_unlock_win32_impl (GMutex *mutex)
+void
+g_rec_mutex_clear (GRecMutex *mutex)
{
- LeaveCriticalSection (*(CRITICAL_SECTION **)mutex);
+ g_rec_mutex_impl_free (mutex->p);
}
-static GCond *
-g_cond_new_win32_impl (void)
+void
+g_rec_mutex_lock (GRecMutex *mutex)
{
- GCond *retval = g_new (GCond, 1);
+ EnterCriticalSection (g_rec_mutex_get_impl (mutex));
+}
- retval->array = g_ptr_array_new ();
- InitializeCriticalSection (&retval->lock);
+void
+g_rec_mutex_unlock (GRecMutex *mutex)
+{
+ LeaveCriticalSection (mutex->p);
+}
- return retval;
+gboolean
+g_rec_mutex_trylock (GRecMutex *mutex)
+{
+ return TryEnterCriticalSection (g_rec_mutex_get_impl (mutex));
}
-static void
-g_cond_signal_win32_impl (GCond * cond)
+/* {{{1 GRWLock */
+
+void
+g_rw_lock_init (GRWLock *lock)
{
- EnterCriticalSection (&cond->lock);
+ InitializeSRWLock ((gpointer) lock);
+}
- if (cond->array->len > 0)
- {
- SetEvent (g_ptr_array_index (cond->array, 0));
- g_ptr_array_remove_index (cond->array, 0);
- }
+void
+g_rw_lock_clear (GRWLock *lock)
+{
+}
- LeaveCriticalSection (&cond->lock);
+void
+g_rw_lock_writer_lock (GRWLock *lock)
+{
+ AcquireSRWLockExclusive ((gpointer) lock);
}
-static void
-g_cond_broadcast_win32_impl (GCond * cond)
+gboolean
+g_rw_lock_writer_trylock (GRWLock *lock)
{
- guint i;
- EnterCriticalSection (&cond->lock);
+ return TryAcquireSRWLockExclusive ((gpointer) lock);
+}
- for (i = 0; i < cond->array->len; i++)
- SetEvent (g_ptr_array_index (cond->array, i));
+void
+g_rw_lock_writer_unlock (GRWLock *lock)
+{
+ ReleaseSRWLockExclusive ((gpointer) lock);
+}
- g_ptr_array_set_size (cond->array, 0);
- LeaveCriticalSection (&cond->lock);
+void
+g_rw_lock_reader_lock (GRWLock *lock)
+{
+ AcquireSRWLockShared ((gpointer) lock);
}
-static gboolean
-g_cond_wait_internal (GCond *cond,
- GMutex *entered_mutex,
- gulong milliseconds)
+gboolean
+g_rw_lock_reader_trylock (GRWLock *lock)
{
- gulong retval;
- HANDLE event = TlsGetValue (g_cond_event_tls);
+ return TryAcquireSRWLockShared ((gpointer) lock);
+}
- if (!event)
- {
- win32_check_for_error (event = CreateEvent (0, FALSE, FALSE, NULL));
- TlsSetValue (g_cond_event_tls, event);
- }
+void
+g_rw_lock_reader_unlock (GRWLock *lock)
+{
+ ReleaseSRWLockShared ((gpointer) lock);
+}
- EnterCriticalSection (&cond->lock);
+/* {{{1 GCond */
+void
+g_cond_init (GCond *cond)
+{
+ InitializeConditionVariable ((gpointer) cond);
+}
- /* The event must not be signaled. Check this */
- g_assert (WaitForSingleObject (event, 0) == WAIT_TIMEOUT);
+void
+g_cond_clear (GCond *cond)
+{
+}
- g_ptr_array_add (cond->array, event);
- LeaveCriticalSection (&cond->lock);
+void
+g_cond_signal (GCond *cond)
+{
+ WakeConditionVariable ((gpointer) cond);
+}
- g_mutex_unlock (entered_mutex);
+void
+g_cond_broadcast (GCond *cond)
+{
+ WakeAllConditionVariable ((gpointer) cond);
+}
- win32_check_for_error (WAIT_FAILED !=
- (retval = WaitForSingleObject (event, milliseconds)));
+void
+g_cond_wait (GCond *cond,
+ GMutex *entered_mutex)
+{
+ SleepConditionVariableSRW ((gpointer) cond, (gpointer) entered_mutex, INFINITE, 0);
+}
- g_mutex_lock (entered_mutex);
+gboolean
+g_cond_wait_until (GCond *cond,
+ GMutex *entered_mutex,
+ gint64 end_time)
+{
+ gint64 span, start_time;
+ DWORD span_millis;
+ gboolean signalled;
- if (retval == WAIT_TIMEOUT)
+ start_time = g_get_monotonic_time ();
+ do
{
- EnterCriticalSection (&cond->lock);
- g_ptr_array_remove (cond->array, event);
-
- /* In the meantime we could have been signaled, so we must again
- * wait for the signal, this time with no timeout, to reset
- * it. retval is set again to honour the late arrival of the
- * signal */
- win32_check_for_error (WAIT_FAILED !=
- (retval = WaitForSingleObject (event, 0)));
+ span = end_time - start_time;
- LeaveCriticalSection (&cond->lock);
- }
+ if G_UNLIKELY (span < 0)
+ span_millis = 0;
+ else if G_UNLIKELY (span > G_GINT64_CONSTANT (1000) * (DWORD) INFINITE)
+ span_millis = INFINITE;
+ else
+ /* Round up so we don't time out too early */
+ span_millis = (span + 1000 - 1) / 1000;
-#ifndef G_DISABLE_ASSERT
- EnterCriticalSection (&cond->lock);
+ /* We never want to wait infinitely */
+ if (span_millis >= INFINITE)
+ span_millis = INFINITE - 1;
- /* Now event must not be inside the array, check this */
- g_assert (g_ptr_array_remove (cond->array, event) == FALSE);
+ signalled = SleepConditionVariableSRW ((gpointer) cond, (gpointer) entered_mutex, span_millis, 0);
+ if (signalled)
+ break;
- LeaveCriticalSection (&cond->lock);
-#endif /* !G_DISABLE_ASSERT */
+ /* In case we didn't wait long enough after a timeout, wait again for the
+ * remaining time */
+ start_time = g_get_monotonic_time ();
+ }
+ while (start_time < end_time);
- return retval != WAIT_TIMEOUT;
+ return signalled;
}
-static void
-g_cond_wait_win32_impl (GCond *cond,
- GMutex *entered_mutex)
-{
- g_return_if_fail (cond != NULL);
- g_return_if_fail (entered_mutex != NULL);
+/* {{{1 GPrivate */
- g_cond_wait_internal (cond, entered_mutex, INFINITE);
-}
+typedef struct _GPrivateDestructor GPrivateDestructor;
-static gboolean
-g_cond_timed_wait_win32_impl (GCond *cond,
- GMutex *entered_mutex,
- GTimeVal *abs_time)
+struct _GPrivateDestructor
{
- GTimeVal current_time;
- gulong to_wait;
+ DWORD index;
+ GDestroyNotify notify;
+ GPrivateDestructor *next;
+};
- g_return_val_if_fail (cond != NULL, FALSE);
- g_return_val_if_fail (entered_mutex != NULL, FALSE);
+static GPrivateDestructor *g_private_destructors; /* (atomic) prepend-only */
+static CRITICAL_SECTION g_private_lock;
- if (!abs_time)
- to_wait = INFINITE;
- else
+static DWORD
+g_private_get_impl (GPrivate *key)
+{
+ DWORD impl = (DWORD) GPOINTER_TO_UINT(key->p);
+
+ if G_UNLIKELY (impl == 0)
{
- g_get_current_time (¤t_time);
- if (abs_time->tv_sec < current_time.tv_sec ||
- (abs_time->tv_sec == current_time.tv_sec &&
- abs_time->tv_usec <= current_time.tv_usec))
- to_wait = 0;
- else
- to_wait = (abs_time->tv_sec - current_time.tv_sec) * 1000 +
- (abs_time->tv_usec - current_time.tv_usec) / 1000;
+ EnterCriticalSection (&g_private_lock);
+ impl = (UINT_PTR) key->p;
+ if (impl == 0)
+ {
+ GPrivateDestructor *destructor;
+
+ impl = TlsAlloc ();
+
+ if G_UNLIKELY (impl == 0)
+ {
+ /* Ignore TLS index 0 temporarily (as 0 is the indicator that we
+ * haven't allocated TLS yet) and alloc again;
+ * See https://gitlab.gnome.org/GNOME/glib/-/issues/2058 */
+ DWORD impl2 = TlsAlloc ();
+ TlsFree (impl);
+ impl = impl2;
+ }
+
+ if (impl == TLS_OUT_OF_INDEXES || impl == 0)
+ 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_atomic_pointer_get (&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 (!g_atomic_pointer_compare_and_exchange (&g_private_destructors,
+ destructor->next,
+ destructor))
+ g_thread_abort (0, "g_private_get_impl(1)");
+ }
+
+ /* Ditto, due to the unlocked access on the fast path */
+ if (!g_atomic_pointer_compare_and_exchange (&key->p, NULL, impl))
+ g_thread_abort (0, "g_private_get_impl(2)");
+ }
+ LeaveCriticalSection (&g_private_lock);
}
- return g_cond_wait_internal (cond, entered_mutex, to_wait);
+ return impl;
}
-static void
-g_cond_free_win32_impl (GCond * cond)
+gpointer
+g_private_get (GPrivate *key)
{
- DeleteCriticalSection (&cond->lock);
- g_ptr_array_free (cond->array, TRUE);
- g_free (cond);
+ return TlsGetValue (g_private_get_impl (key));
}
-static GPrivate *
-g_private_new_win32_impl (GDestroyNotify destructor)
+void
+g_private_set (GPrivate *key,
+ gpointer value)
{
- GPrivate *result;
- EnterCriticalSection (&g_thread_global_spinlock);
- if (g_private_next >= G_PRIVATE_MAX)
- {
- char buf[100];
- sprintf (buf,
- "Too many GPrivate allocated. Their number is limited to %d.",
- G_PRIVATE_MAX);
- MessageBox (NULL, buf, NULL, MB_ICONERROR|MB_SETFOREGROUND);
- if (IsDebuggerPresent ())
- G_BREAKPOINT ();
- abort ();
- }
- g_private_destructors[g_private_next] = destructor;
- result = GUINT_TO_POINTER (g_private_next);
- g_private_next++;
- LeaveCriticalSection (&g_thread_global_spinlock);
-
- return result;
+ TlsSetValue (g_private_get_impl (key), value);
}
-/* NOTE: the functions g_private_get and g_private_set may not use
- functions from gmem.c and gmessages.c */
-
-static void
-g_private_set_win32_impl (GPrivate * private_key, gpointer value)
+void
+g_private_replace (GPrivate *key,
+ gpointer value)
{
- gpointer* array = TlsGetValue (g_private_tls);
- guint index = GPOINTER_TO_UINT (private_key);
+ DWORD impl = g_private_get_impl (key);
+ gpointer old;
- if (index >= G_PRIVATE_MAX)
- return;
+ old = TlsGetValue (impl);
+ TlsSetValue (impl, value);
+ if (old && key->notify)
+ key->notify (old);
+}
- if (!array)
- {
- array = (gpointer*) calloc (G_PRIVATE_MAX, sizeof (gpointer));
- TlsSetValue (g_private_tls, array);
- }
+/* {{{1 GThread */
- array[index] = value;
-}
+#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))
-static gpointer
-g_private_get_win32_impl (GPrivate * private_key)
+typedef BOOL (__stdcall *GTryEnterCriticalSectionFunc) (CRITICAL_SECTION *);
+
+typedef struct
{
- gpointer* array = TlsGetValue (g_private_tls);
- guint index = GPOINTER_TO_UINT (private_key);
+ GRealThread thread;
- if (index >= G_PRIVATE_MAX || !array)
- return NULL;
+ GThreadFunc proxy;
+ HANDLE handle;
+} GThreadWin32;
- return array[index];
+void
+g_system_thread_free (GRealThread *thread)
+{
+ GThreadWin32 *wt = (GThreadWin32 *) thread;
+
+ win32_check_for_error (CloseHandle (wt->handle));
+ g_slice_free (GThreadWin32, wt);
}
-static void
-g_thread_set_priority_win32_impl (gpointer thread, GThreadPriority priority)
+void
+g_system_thread_exit (void)
{
- GThreadData *target = *(GThreadData **)thread;
- gint native_prio;
+ /* In static compilation, DllMain doesn't exist and so DLL_THREAD_DETACH
+ * case is never called and thread destroy notifications are not triggered.
+ * To ensure that notifications are correctly triggered in static
+ * compilation mode, we call directly the "detach" function here right
+ * before terminating the thread.
+ * As all win32 threads initialized through the glib API are run through
+ * the same proxy function g_thread_win32_proxy() which calls systematically
+ * g_system_thread_exit() when finishing, we obtain the same behavior as
+ * with dynamic compilation.
+ *
+ * WARNING: unfortunately this mechanism cannot work with threads created
+ * directly from the Windows API using CreateThread() or _beginthread/ex().
+ * It only works with threads created by using the glib API with
+ * g_system_thread_new(). If users need absolutely to use a thread NOT
+ * created with glib API under Windows and in static compilation mode, they
+ * should not use glib functions within their thread or they may encounter
+ * memory leaks when the thread finishes.
+ */
+#ifdef GLIB_STATIC_COMPILATION
+ g_thread_win32_thread_detach ();
+#endif
- switch (priority)
- {
- case G_THREAD_PRIORITY_LOW:
- native_prio = THREAD_PRIORITY_BELOW_NORMAL;
- break;
+ _endthreadex (0);
+}
- case G_THREAD_PRIORITY_NORMAL:
- native_prio = THREAD_PRIORITY_NORMAL;
- break;
+static guint __stdcall
+g_thread_win32_proxy (gpointer data)
+{
+ GThreadWin32 *self = data;
- case G_THREAD_PRIORITY_HIGH:
- native_prio = THREAD_PRIORITY_ABOVE_NORMAL;
- break;
+ self->proxy (self);
- case G_THREAD_PRIORITY_URGENT:
- native_prio = THREAD_PRIORITY_HIGHEST;
- break;
+ g_system_thread_exit ();
- default:
- g_return_if_reached ();
- }
+ g_assert_not_reached ();
- win32_check_for_error (SetThreadPriority (target->thread, native_prio));
+ return 0;
}
-static void
-g_thread_self_win32_impl (gpointer thread)
+gboolean
+g_system_thread_get_scheduler_settings (GThreadSchedulerSettings *scheduler_settings)
{
- GThreadData *self = TlsGetValue (g_thread_self_tls);
-
- if (!self)
- {
- /* This should only happen for the main thread! */
- HANDLE handle = GetCurrentThread ();
- HANDLE process = GetCurrentProcess ();
- self = g_new (GThreadData, 1);
- win32_check_for_error (DuplicateHandle (process, handle, process,
- &self->thread, 0, FALSE,
- DUPLICATE_SAME_ACCESS));
- win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
- self->func = NULL;
- self->data = NULL;
- self->joinable = FALSE;
- }
+ HANDLE current_thread = GetCurrentThread ();
+ scheduler_settings->thread_prio = GetThreadPriority (current_thread);
- *(GThreadData **)thread = self;
+ return TRUE;
}
-static void
-g_thread_exit_win32_impl (void)
+GRealThread *
+g_system_thread_new (GThreadFunc proxy,
+ gulong stack_size,
+ const GThreadSchedulerSettings *scheduler_settings,
+ const char *name,
+ GThreadFunc func,
+ gpointer data,
+ GError **error)
{
- GThreadData *self = TlsGetValue (g_thread_self_tls);
- guint i, private_max;
- gpointer *array = TlsGetValue (g_private_tls);
- HANDLE event = TlsGetValue (g_cond_event_tls);
-
- EnterCriticalSection (&g_thread_global_spinlock);
- private_max = g_private_next;
- LeaveCriticalSection (&g_thread_global_spinlock);
-
- if (array)
+ GThreadWin32 *thread;
+ GRealThread *base_thread;
+ guint ignore;
+ const gchar *message = NULL;
+ int thread_prio;
+
+ thread = g_slice_new0 (GThreadWin32);
+ thread->proxy = proxy;
+ thread->handle = (HANDLE) NULL;
+ base_thread = (GRealThread*)thread;
+ base_thread->ref_count = 2;
+ base_thread->ours = TRUE;
+ base_thread->thread.joinable = TRUE;
+ base_thread->thread.func = func;
+ base_thread->thread.data = data;
+ base_thread->name = g_strdup (name);
+
+ thread->handle = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_win32_proxy, thread,
+ CREATE_SUSPENDED, &ignore);
+
+ if (thread->handle == NULL)
{
- gboolean some_data_non_null;
-
- do {
- some_data_non_null = FALSE;
- for (i = 0; i < private_max; i++)
- {
- GDestroyNotify destructor = g_private_destructors[i];
- GDestroyNotify data = array[i];
-
- if (data)
- some_data_non_null = TRUE;
-
- array[i] = NULL;
+ message = "Error creating thread";
+ goto error;
+ }
- if (destructor && data)
- destructor (data);
- }
- } while (some_data_non_null);
+ /* For thread priority inheritance we need to manually set the thread
+ * priority of the new thread to the priority of the current thread. We
+ * also have to start the thread suspended and resume it after actually
+ * setting the priority here.
+ *
+ * On Windows, by default all new threads are created with NORMAL thread
+ * priority.
+ */
- free (array);
+ if (scheduler_settings)
+ {
+ thread_prio = scheduler_settings->thread_prio;
+ }
+ else
+ {
+ HANDLE current_thread = GetCurrentThread ();
+ thread_prio = GetThreadPriority (current_thread);
+ }
- win32_check_for_error (TlsSetValue (g_private_tls, NULL));
+ if (thread_prio == THREAD_PRIORITY_ERROR_RETURN)
+ {
+ message = "Error getting current thread priority";
+ goto error;
}
- if (self)
+ if (SetThreadPriority (thread->handle, thread_prio) == 0)
{
- if (!self->joinable)
- {
- win32_check_for_error (CloseHandle (self->thread));
- g_free (self);
- }
- win32_check_for_error (TlsSetValue (g_thread_self_tls, NULL));
+ message = "Error setting new thread priority";
+ goto error;
}
- if (event)
+ if (ResumeThread (thread->handle) == (DWORD) -1)
{
- CloseHandle (event);
- win32_check_for_error (TlsSetValue (g_cond_event_tls, NULL));
+ message = "Error resuming new thread";
+ goto error;
}
- _endthreadex (0);
+ return (GRealThread *) thread;
+
+error:
+ {
+ gchar *win_error = g_win32_error_message (GetLastError ());
+ g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN,
+ "%s: %s", message, win_error);
+ g_free (win_error);
+ if (thread->handle)
+ CloseHandle (thread->handle);
+ g_slice_free (GThreadWin32, thread);
+ return NULL;
+ }
}
-static guint __stdcall
-g_thread_proxy (gpointer data)
+void
+g_thread_yield (void)
+{
+ Sleep(0);
+}
+
+void
+g_system_thread_wait (GRealThread *thread)
{
- GThreadData *self = (GThreadData*) data;
+ GThreadWin32 *wt = (GThreadWin32 *) thread;
- win32_check_for_error (TlsSetValue (g_thread_self_tls, self));
+ win32_check_for_error (WAIT_FAILED != WaitForSingleObject (wt->handle, INFINITE));
+}
- self->func (self->data);
+#define EXCEPTION_SET_THREAD_NAME ((DWORD) 0x406D1388)
- g_thread_exit_win32_impl ();
+#ifndef _MSC_VER
+static void *SetThreadName_VEH_handle = NULL;
- g_assert_not_reached ();
+static LONG __stdcall
+SetThreadName_VEH (PEXCEPTION_POINTERS ExceptionInfo)
+{
+ if (ExceptionInfo->ExceptionRecord != NULL &&
+ ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_SET_THREAD_NAME)
+ return EXCEPTION_CONTINUE_EXECUTION;
- return 0;
+ 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
-g_thread_create_win32_impl (GThreadFunc func,
- gpointer data,
- gulong stack_size,
- gboolean joinable,
- gboolean bound,
- GThreadPriority priority,
- gpointer thread,
- GError **error)
+SetThreadName (DWORD dwThreadID,
+ LPCSTR szThreadName)
{
- guint ignore;
- GThreadData *retval;
+ 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,
+ (const ULONG_PTR *) &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, (const ULONG_PTR *) &info);
+#endif
+}
- g_return_if_fail (func);
- g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW);
- g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT);
+typedef HRESULT (WINAPI *pSetThreadDescription) (HANDLE hThread,
+ PCWSTR lpThreadDescription);
+static pSetThreadDescription SetThreadDescriptionFunc = NULL;
+static HMODULE kernel32_module = NULL;
- retval = g_new(GThreadData, 1);
- retval->func = func;
- retval->data = data;
+static gboolean
+g_thread_win32_load_library (void)
+{
+ /* FIXME: Add support for UWP app */
+#if !defined(G_WINAPI_ONLY_APP)
+ static gsize _init_once = 0;
+ if (g_once_init_enter (&_init_once))
+ {
+ kernel32_module = LoadLibraryW (L"kernel32.dll");
+ if (kernel32_module)
+ {
+ SetThreadDescriptionFunc =
+ (pSetThreadDescription) GetProcAddress (kernel32_module,
+ "SetThreadDescription");
+ if (!SetThreadDescriptionFunc)
+ FreeLibrary (kernel32_module);
+ }
+ g_once_init_leave (&_init_once, 1);
+ }
+#endif
- retval->joinable = joinable;
+ return !!SetThreadDescriptionFunc;
+}
- retval->thread = (HANDLE) _beginthreadex (NULL, stack_size, g_thread_proxy,
- retval, 0, &ignore);
+static gboolean
+g_thread_win32_set_thread_desc (const gchar *name)
+{
+ HRESULT hr;
+ wchar_t *namew;
- if (retval->thread == 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 (retval);
- g_free (win_error);
- return;
- }
+ if (!g_thread_win32_load_library () || !name)
+ return FALSE;
+
+ namew = g_utf8_to_utf16 (name, -1, NULL, NULL, NULL);
+ if (!namew)
+ return FALSE;
- *(GThreadData **)thread = retval;
+ hr = SetThreadDescriptionFunc (GetCurrentThread (), namew);
- g_thread_set_priority_win32_impl (thread, priority);
+ g_free (namew);
+ return SUCCEEDED (hr);
}
-static void
-g_thread_yield_win32_impl (void)
+void
+g_system_thread_set_name (const gchar *name)
{
- Sleep(0);
+ /* Prefer SetThreadDescription over exception based way if available,
+ * since thread description set by SetThreadDescription will be preserved
+ * in dump file */
+ if (!g_thread_win32_set_thread_desc (name))
+ SetThreadName ((DWORD) -1, name);
}
-static void
-g_thread_join_win32_impl (gpointer thread)
-{
- GThreadData *target = *(GThreadData **)thread;
-
- g_return_if_fail (target->joinable);
-
- win32_check_for_error (WAIT_FAILED !=
- WaitForSingleObject (target->thread, INFINITE));
-
- win32_check_for_error (CloseHandle (target->thread));
- g_free (target);
-}
-
-GThreadFunctions g_thread_functions_for_glib_use =
-{
- g_mutex_new_win32_impl, /* mutex */
- g_mutex_lock_win32_impl,
- g_mutex_trylock_win32_impl,
- g_mutex_unlock_win32_impl,
- g_mutex_free_win32_impl,
- g_cond_new_win32_impl, /* condition */
- g_cond_signal_win32_impl,
- g_cond_broadcast_win32_impl,
- g_cond_wait_win32_impl,
- g_cond_timed_wait_win32_impl,
- g_cond_free_win32_impl,
- g_private_new_win32_impl, /* private thread data */
- g_private_get_win32_impl,
- g_private_set_win32_impl,
- g_thread_create_win32_impl, /* thread */
- g_thread_yield_win32_impl,
- g_thread_join_win32_impl,
- g_thread_exit_win32_impl,
- g_thread_set_priority_win32_impl,
- g_thread_self_win32_impl,
- NULL /* no equal function necessary */
-};
+/* {{{1 Epilogue */
void
-_g_thread_impl_init (void)
+g_thread_win32_init (void)
{
- static gboolean beenhere = FALSE;
+ InitializeCriticalSection (&g_private_lock);
- if (beenhere)
- return;
+#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;
- beenhere = TRUE;
+ 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_atomic_pointer_get (&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);
+}
- win32_check_for_error (TLS_OUT_OF_INDEXES !=
- (g_thread_self_tls = TlsAlloc ()));
- win32_check_for_error (TLS_OUT_OF_INDEXES !=
- (g_private_tls = TlsAlloc ()));
- win32_check_for_error (TLS_OUT_OF_INDEXES !=
- (g_cond_event_tls = TlsAlloc ()));
- InitializeCriticalSection (&g_thread_global_spinlock);
+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: */
projects / platform / upstream / glib.git / blobdiff