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Use g_atomic_pointer_set instead of old homegrown version now that we have

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2006-05-10  Sebastian Wilhelmi  <wilhelmi@google.com>

	* glib/gthread.c: Use g_atomic_pointer_set instead of old
	homegrown version now that we have it. (#335198, Chris Wilson)
This commit is contained in:
Sebastian Wilhelmi 2006-05-11 00:10:29 +00:00 committed by Sebastian Wilhelmi
parent 685da6b099
commit a93560b83d
3 changed files with 71 additions and 74 deletions
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3
ChangeLog
View File

@ -1,5 +1,8 @@
2006-05-10 Sebastian Wilhelmi <wilhelmi@google.com>
* glib/gthread.c: Use g_atomic_pointer_set instead of old
homegrown version now that we have it. (#335198, Chris Wilson)
* gthread/gthread-posix.c, gthread/gthread-win32.c: Prevent
calling into g_cond_wait resp. g_mutex_lock/unlock directly to
avoid recursions into the errorcheking mutex code (and out of

3
ChangeLog.pre-2-12
View File

@ -1,5 +1,8 @@
2006-05-10 Sebastian Wilhelmi <wilhelmi@google.com>
* glib/gthread.c: Use g_atomic_pointer_set instead of old
homegrown version now that we have it. (#335198, Chris Wilson)
* gthread/gthread-posix.c, gthread/gthread-win32.c: Prevent
calling into g_cond_wait resp. g_mutex_lock/unlock directly to
avoid recursions into the errorcheking mutex code (and out of

139
glib/gthread.c
View File

@ -25,10 +25,10 @@
* 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/.
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
/*
* MT safe
*/
@ -44,7 +44,7 @@
#include "gthreadprivate.h"
#include "galias.h"
GQuark
GQuark
g_thread_error_quark (void)
{
return g_quark_from_static_string ("g_thread_error");
@ -92,15 +92,15 @@ GThreadFunctions g_thread_functions_for_glib_use = {
(GPrivate*(*)(GDestroyNotify))g_thread_fail, /* private_new */
NULL, /* private_get */
NULL, /* private_set */
(void(*)(GThreadFunc, gpointer, gulong,
gboolean, gboolean, GThreadPriority,
(void(*)(GThreadFunc, gpointer, gulong,
gboolean, gboolean, GThreadPriority,
gpointer, GError**))g_thread_fail, /* thread_create */
NULL, /* thread_yield */
NULL, /* thread_join */
NULL, /* thread_exit */
NULL, /* thread_set_priority */
NULL /* thread_self */
};
};
/* Local data */
@ -116,7 +116,7 @@ G_LOCK_DEFINE_STATIC (g_thread);
/* This must be called only once, before any threads are created.
* It will only be called from g_thread_init() in -lgthread.
*/
void
void
g_thread_init_glib (void)
{
/* We let the main thread (the one that calls g_thread_init) inherit
@ -155,34 +155,34 @@ g_thread_init_glib (void)
}
#endif /* G_THREADS_ENABLED */
gpointer
g_once_impl (GOnce *once,
GThreadFunc func,
gpointer
g_once_impl (GOnce *once,
GThreadFunc func,
gpointer arg)
{
g_mutex_lock (g_once_mutex);
while (once->status == G_ONCE_STATUS_PROGRESS)
g_cond_wait (g_once_cond, g_once_mutex);
if (once->status != G_ONCE_STATUS_READY)
{
once->status = G_ONCE_STATUS_PROGRESS;
g_mutex_unlock (g_once_mutex);
once->retval = func (arg);
g_mutex_lock (g_once_mutex);
once->status = G_ONCE_STATUS_READY;
g_cond_broadcast (g_once_cond);
}
g_mutex_unlock (g_once_mutex);
return once->retval;
}
void
void
g_static_mutex_init (GStaticMutex *mutex)
{
static const GStaticMutex init_mutex = G_STATIC_MUTEX_INIT;
@ -202,20 +202,11 @@ g_static_mutex_get_mutex_impl (GMutex** mutex)
g_mutex_lock (g_once_mutex);
if (!(*mutex))
{
GMutex *new_mutex = g_mutex_new ();
/* The following is a memory barrier to avoid the write
* to *new_mutex being reordered to after writing *mutex */
g_mutex_lock (new_mutex);
g_mutex_unlock (new_mutex);
*mutex = new_mutex;
}
if (!(*mutex))
g_atomic_pointer_set (mutex, g_mutex_new());
g_mutex_unlock (g_once_mutex);
return *mutex;
}
@ -223,24 +214,24 @@ void
g_static_mutex_free (GStaticMutex* mutex)
{
GMutex **runtime_mutex;
g_return_if_fail (mutex);
/* The runtime_mutex is the first (or only) member of GStaticMutex,
* see both versions (of glibconfig.h) in configure.in */
runtime_mutex = ((GMutex**)mutex);
if (*runtime_mutex)
g_mutex_free (*runtime_mutex);
*runtime_mutex = NULL;
}
void
void
g_static_rec_mutex_init (GStaticRecMutex *mutex)
{
static const GStaticRecMutex init_mutex = G_STATIC_REC_MUTEX_INIT;
g_return_if_fail (mutex);
*mutex = init_mutex;
@ -308,7 +299,7 @@ g_static_rec_mutex_unlock (GStaticRecMutex* mutex)
return;
}
g_system_thread_assign (mutex->owner, zero_thread);
g_static_mutex_unlock (&mutex->mutex);
g_static_mutex_unlock (&mutex->mutex);
}
void
@ -336,7 +327,7 @@ g_static_rec_mutex_lock_full (GStaticRecMutex *mutex,
mutex->depth = depth;
}
guint
guint
g_static_rec_mutex_unlock_full (GStaticRecMutex *mutex)
{
guint depth;
@ -363,7 +354,7 @@ g_static_rec_mutex_free (GStaticRecMutex *mutex)
g_static_mutex_free (&mutex->mutex);
}
void
void
g_static_private_init (GStaticPrivate *private_key)
{
private_key->index = 0;
@ -382,14 +373,14 @@ g_static_private_get (GStaticPrivate *private_key)
if (!private_key->index)
return NULL;
else if (private_key->index <= array->len)
return g_array_index (array, GStaticPrivateNode,
return g_array_index (array, GStaticPrivateNode,
private_key->index - 1).data;
else
return NULL;
}
void
g_static_private_set (GStaticPrivate *private_key,
g_static_private_set (GStaticPrivate *private_key,
gpointer data,
GDestroyNotify notify)
{
@ -413,9 +404,9 @@ g_static_private_set (GStaticPrivate *private_key,
{
if (g_thread_free_indeces)
{
private_key->index =
private_key->index =
GPOINTER_TO_UINT (g_thread_free_indeces->data);
g_thread_free_indeces =
g_thread_free_indeces =
g_slist_delete_link (g_thread_free_indeces,
g_thread_free_indeces);
}
@ -447,7 +438,7 @@ g_static_private_set (GStaticPrivate *private_key,
}
}
void
void
g_static_private_free (GStaticPrivate *private_key)
{
guint index = private_key->index;
@ -455,11 +446,11 @@ g_static_private_free (GStaticPrivate *private_key)
if (!index)
return;
private_key->index = 0;
G_LOCK (g_thread);
thread = g_thread_all_threads;
while (thread)
{
@ -468,8 +459,8 @@ g_static_private_free (GStaticPrivate *private_key)
if (array && index <= array->len)
{
GStaticPrivateNode *node = &g_array_index (array,
GStaticPrivateNode,
GStaticPrivateNode *node = &g_array_index (array,
GStaticPrivateNode,
index - 1);
gpointer ddata = node->data;
GDestroyNotify ddestroy = node->destroy;
@ -477,7 +468,7 @@ g_static_private_free (GStaticPrivate *private_key)
node->data = NULL;
node->destroy = NULL;
if (ddestroy)
if (ddestroy)
{
G_UNLOCK (g_thread);
ddestroy (ddata);
@ -485,7 +476,7 @@ g_static_private_free (GStaticPrivate *private_key)
}
}
}
g_thread_free_indeces = g_slist_prepend (g_thread_free_indeces,
g_thread_free_indeces = g_slist_prepend (g_thread_free_indeces,
GUINT_TO_POINTER (index));
G_UNLOCK (g_thread);
}
@ -500,10 +491,10 @@ g_thread_cleanup (gpointer data)
{
GArray* array = thread->private_data;
guint i;
for (i = 0; i < array->len; i++ )
{
GStaticPrivateNode *node =
GStaticPrivateNode *node =
&g_array_index (array, GStaticPrivateNode, i);
if (node->destroy)
node->destroy (node->data);
@ -530,7 +521,7 @@ g_thread_cleanup (gpointer data)
}
}
G_UNLOCK (g_thread);
/* Just to make sure, this isn't used any more */
g_system_thread_assign (thread->system_thread, zero_thread);
g_free (thread);
@ -558,13 +549,13 @@ g_thread_create_proxy (gpointer data)
before thread->thread.func is called. See g_thread_create. */
G_LOCK (g_thread);
G_UNLOCK (g_thread);
thread->retval = thread->thread.func (thread->thread.data);
return NULL;
}
GThread*
GThread*
g_thread_create_full (GThreadFunc func,
gpointer data,
gulong stack_size,
@ -578,16 +569,16 @@ g_thread_create_full (GThreadFunc func,
g_return_val_if_fail (func, NULL);
g_return_val_if_fail (priority >= G_THREAD_PRIORITY_LOW, NULL);
g_return_val_if_fail (priority <= G_THREAD_PRIORITY_URGENT, NULL);
result = g_new0 (GRealThread, 1);
result->thread.joinable = joinable;
result->thread.priority = priority;
result->thread.func = func;
result->thread.data = data;
result->private_data = NULL;
result->private_data = NULL;
G_LOCK (g_thread);
G_THREAD_UF (thread_create, (g_thread_create_proxy, result,
G_THREAD_UF (thread_create, (g_thread_create_proxy, result,
stack_size, joinable, bound, priority,
&result->system_thread, &local_error));
result->next = g_thread_all_threads;
@ -621,7 +612,7 @@ g_thread_join (GThread* thread)
g_return_val_if_fail (thread, NULL);
g_return_val_if_fail (thread->joinable, NULL);
g_return_val_if_fail (!g_system_thread_equal (real->system_thread,
g_return_val_if_fail (!g_system_thread_equal (real->system_thread,
zero_thread), NULL);
G_THREAD_UF (thread_join, (&real->system_thread));
@ -656,7 +647,7 @@ g_thread_join (GThread* thread)
}
void
g_thread_set_priority (GThread* thread,
g_thread_set_priority (GThread* thread,
GThreadPriority priority)
{
GRealThread* real = (GRealThread*) thread;
@ -668,7 +659,7 @@ g_thread_set_priority (GThread* thread,
thread->priority = priority;
G_THREAD_CF (thread_set_priority, (void)0,
G_THREAD_CF (thread_set_priority, (void)0,
(&real->system_thread, priority));
}
@ -678,7 +669,7 @@ g_thread_self (void)
GRealThread* thread = g_private_get (g_thread_specific_private);
if (!thread)
{
{
/* If no thread data is available, provide and set one. This
can happen for the main thread and for threads, that are not
created by GLib. */
@ -693,14 +684,14 @@ g_thread_self (void)
if (g_thread_supported ())
G_THREAD_UF (thread_self, (&thread->system_thread));
g_private_set (g_thread_specific_private, thread);
g_private_set (g_thread_specific_private, thread);
G_LOCK (g_thread);
thread->next = g_thread_all_threads;
g_thread_all_threads = thread;
G_UNLOCK (g_thread);
}
return (GThread*)thread;
}
@ -714,7 +705,7 @@ g_static_rw_lock_init (GStaticRWLock* lock)
*lock = init_lock;
}
inline static void
inline static void
g_static_rw_lock_wait (GCond** cond, GStaticMutex* mutex)
{
if (!*cond)
@ -722,7 +713,7 @@ g_static_rw_lock_wait (GCond** cond, GStaticMutex* mutex)
g_cond_wait (*cond, g_static_mutex_get_mutex (mutex));
}
inline static void
inline static void
g_static_rw_lock_signal (GStaticRWLock* lock)
{
if (lock->want_to_write && lock->write_cond)
@ -731,7 +722,7 @@ g_static_rw_lock_signal (GStaticRWLock* lock)
g_cond_broadcast (lock->read_cond);
}
void
void
g_static_rw_lock_reader_lock (GStaticRWLock* lock)
{
g_return_if_fail (lock);
@ -741,14 +732,14 @@ g_static_rw_lock_reader_lock (GStaticRWLock* lock)
g_static_mutex_lock (&lock->mutex);
lock->want_to_read++;
while (lock->have_writer || lock->want_to_write)
while (lock->have_writer || lock->want_to_write)
g_static_rw_lock_wait (&lock->read_cond, &lock->mutex);
lock->want_to_read--;
lock->read_counter++;
g_static_mutex_unlock (&lock->mutex);
}
gboolean
gboolean
g_static_rw_lock_reader_trylock (GStaticRWLock* lock)
{
gboolean ret_val = FALSE;
@ -768,7 +759,7 @@ g_static_rw_lock_reader_trylock (GStaticRWLock* lock)
return ret_val;
}
void
void
g_static_rw_lock_reader_unlock (GStaticRWLock* lock)
{
g_return_if_fail (lock);
@ -783,7 +774,7 @@ g_static_rw_lock_reader_unlock (GStaticRWLock* lock)
g_static_mutex_unlock (&lock->mutex);
}
void
void
g_static_rw_lock_writer_lock (GStaticRWLock* lock)
{
g_return_if_fail (lock);
@ -800,13 +791,13 @@ g_static_rw_lock_writer_lock (GStaticRWLock* lock)
g_static_mutex_unlock (&lock->mutex);
}
gboolean
gboolean
g_static_rw_lock_writer_trylock (GStaticRWLock* lock)
{
gboolean ret_val = FALSE;
g_return_val_if_fail (lock, FALSE);
if (!g_threads_got_initialized)
return TRUE;
@ -820,25 +811,25 @@ g_static_rw_lock_writer_trylock (GStaticRWLock* lock)
return ret_val;
}
void
void
g_static_rw_lock_writer_unlock (GStaticRWLock* lock)
{
g_return_if_fail (lock);
if (!g_threads_got_initialized)
return;
g_static_mutex_lock (&lock->mutex);
lock->have_writer = FALSE;
lock->have_writer = FALSE;
g_static_rw_lock_signal (lock);
g_static_mutex_unlock (&lock->mutex);
}
void
void
g_static_rw_lock_free (GStaticRWLock* lock)
{
g_return_if_fail (lock);
if (lock->read_cond)
{
g_cond_free (lock->read_cond);