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glib/gobject/gobject.c
Tim Janik f3848154ae only queue readable properties for notification changes. 
Wed Mar 28 17:04:06 2001  Tim Janik  <timj@gtk.org>

        * gobject.c (object_queue_property): only queue readable properties
        for notification changes.
2001-03-28 15:26:19 +00:00

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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
*
* 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.
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* MT safe
*/
#include "gobject.h"
#include "gvaluecollector.h"
#include "gsignal.h"
#include "gparamspecs.h"
#include "gvaluetypes.h"
#include <string.h>
#define PREALLOC_CPARAMS (8)
/* --- macros --- */
#define PARAM_SPEC_PARAM_ID(pspec) (GPOINTER_TO_UINT (g_param_spec_get_qdata ((pspec), quark_property_id)))
/* --- signals --- */
enum {
PROPERTIES_CHANGED,
NOTIFY,
LAST_SIGNAL
};
/* --- properties --- */
enum {
PROP_NONE
};
/* --- typedefs --- */
typedef struct _NotifyQueue NotifyQueue;
/* --- prototypes --- */
static void g_object_base_class_init (GObjectClass *class);
static void g_object_base_class_finalize (GObjectClass *class);
static void g_object_do_class_init (GObjectClass *class);
static void g_object_init (GObject *object);
static GObject* g_object_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params);
static void g_object_last_unref (GObject *object);
static void g_object_shutdown (GObject *object);
static void g_object_finalize (GObject *object);
static void g_object_do_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void g_object_do_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void g_value_object_init (GValue *value);
static void g_value_object_free_value (GValue *value);
static void g_value_object_copy_value (const GValue *src_value,
GValue *dest_value);
static void g_value_object_transform_value (const GValue *src_value,
GValue *dest_value);
static gpointer g_value_object_peek_pointer (const GValue *value);
static gchar* g_value_object_collect_value (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
static gchar* g_value_object_lcopy_value (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
static void g_object_dispatch_properties_changed (GObject *object,
guint n_pspecs,
GParamSpec **pspecs);
static void g_object_properties_changed (GObject *object,
guint n_pspecs,
GParamSpec **pspecs);
static void g_object_notify_property_changed (GObject *object,
GParamSpec *pspec);
static inline NotifyQueue* object_freeze_notifies (GObject *object);
static inline void object_queue_property (GObject *object,
GParamSpec *pspec,
NotifyQueue *nqueue);
static inline void object_thaw_notifies (GObject *object,
NotifyQueue *nqueue);
static inline void object_get_property (GObject *object,
GParamSpec *pspec,
GValue *value);
static inline void object_set_property (GObject *object,
GParamSpec *pspec,
const GValue *value,
NotifyQueue *nqueue);
/* --- structures --- */
struct _NotifyQueue
{
GSList *pspecs;
guint n_pspecs;
guint freeze_count;
};
/* --- variables --- */
static GQuark quark_notify_queue = 0;
static GQuark quark_property_id = 0;
static GQuark quark_closure_array = 0;
static GParamSpecPool *pspec_pool = NULL;
static gulong gobject_signals[LAST_SIGNAL] = { 0, };
/* --- functions --- */
#ifdef G_ENABLE_DEBUG
#define IF_DEBUG(debug_type) if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type)
G_LOCK_DEFINE_STATIC (debug_objects);
static volatile GObject *g_trap_object_ref = NULL;
static guint debug_objects_count = 0;
static GHashTable *debug_objects_ht = NULL;
static void
debug_objects_foreach (gpointer key,
gpointer value,
gpointer user_data)
{
GObject *object = value;
g_message ("[%p] stale %s\tref_count=%u",
object,
G_OBJECT_TYPE_NAME (object),
object->ref_count);
}
static void
debug_objects_atexit (void)
{
IF_DEBUG (OBJECTS)
{
G_LOCK (debug_objects);
if (debug_objects_ht)
{
g_message ("stale GObjects: %u", debug_objects_count);
g_hash_table_foreach (debug_objects_ht, debug_objects_foreach, NULL);
}
G_UNLOCK (debug_objects);
}
}
#endif /* G_ENABLE_DEBUG */
void
g_object_type_init (void) /* sync with gtype.c */
{
static gboolean initialized = FALSE;
static const GTypeFundamentalInfo finfo = {
G_TYPE_FLAG_CLASSED | G_TYPE_FLAG_INSTANTIATABLE | G_TYPE_FLAG_DERIVABLE | G_TYPE_FLAG_DEEP_DERIVABLE,
};
static GTypeInfo info = {
sizeof (GObjectClass),
(GBaseInitFunc) g_object_base_class_init,
(GBaseFinalizeFunc) g_object_base_class_finalize,
(GClassInitFunc) g_object_do_class_init,
NULL /* class_destroy */,
NULL /* class_data */,
sizeof (GObject),
0 /* n_preallocs */,
(GInstanceInitFunc) g_object_init,
NULL, /* value_table */
};
static const GTypeValueTable value_table = {
g_value_object_init, /* value_init */
g_value_object_free_value, /* value_free */
g_value_object_copy_value, /* value_copy */
g_value_object_peek_pointer, /* value_peek_pointer */
"p", /* collect_format */
g_value_object_collect_value, /* collect_value */
"p", /* lcopy_format */
g_value_object_lcopy_value, /* lcopy_value */
};
GType type;
g_return_if_fail (initialized == FALSE);
initialized = TRUE;
/* G_TYPE_OBJECT
*/
info.value_table = &value_table;
type = g_type_register_fundamental (G_TYPE_OBJECT, "GObject", &info, &finfo, 0);
g_assert (type == G_TYPE_OBJECT);
g_value_register_transform_func (G_TYPE_OBJECT, G_TYPE_OBJECT, g_value_object_transform_value);
#ifdef G_ENABLE_DEBUG
IF_DEBUG (OBJECTS)
g_atexit (debug_objects_atexit);
#endif /* G_ENABLE_DEBUG */
}
static void
g_object_base_class_init (GObjectClass *class)
{
GObjectClass *pclass = g_type_class_peek_parent (class);
/* reset instance specific fields and methods that don't get inherited */
class->n_property_specs = 0;
class->property_specs = NULL;
class->construct_properties = pclass ? g_slist_copy (pclass->construct_properties) : NULL;
class->get_property = NULL;
class->set_property = NULL;
}
static void
g_object_base_class_finalize (GObjectClass *class)
{
guint i;
g_message ("finallizing base class of %s", G_OBJECT_CLASS_NAME (class));
_g_signals_destroy (G_OBJECT_CLASS_TYPE (class));
g_slist_free (class->construct_properties);
class->construct_properties = NULL;
for (i = 0; i < class->n_property_specs; i++)
{
GParamSpec *pspec = class->property_specs[i];
g_param_spec_pool_remove (pspec_pool, pspec);
g_param_spec_set_qdata (pspec, quark_property_id, NULL);
g_param_spec_unref (pspec);
}
class->n_property_specs = 0;
g_free (class->property_specs);
class->property_specs = NULL;
}
static void
g_object_do_class_init (GObjectClass *class)
{
quark_notify_queue = g_quark_from_static_string ("GObject-notify-queue");
quark_property_id = g_quark_from_static_string ("GObject-property-id");
quark_closure_array = g_quark_from_static_string ("GObject-closure-array");
pspec_pool = g_param_spec_pool_new (TRUE);
class->constructor = g_object_constructor;
class->set_property = g_object_do_set_property;
class->get_property = g_object_do_get_property;
class->shutdown = g_object_shutdown;
class->finalize = g_object_finalize;
class->dispatch_properties_changed = g_object_dispatch_properties_changed;
class->properties_changed = g_object_properties_changed;
class->notify = g_object_notify_property_changed;
gobject_signals[PROPERTIES_CHANGED] =
g_signal_newc ("properties_changed",
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
G_STRUCT_OFFSET (GObjectClass, properties_changed),
NULL, NULL,
g_cclosure_marshal_VOID__UINT_POINTER,
G_TYPE_NONE,
2, G_TYPE_UINT, G_TYPE_POINTER);
gobject_signals[NOTIFY] =
g_signal_newc ("notify",
G_TYPE_FROM_CLASS (class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE | G_SIGNAL_DETAILED | G_SIGNAL_NO_HOOKS,
G_STRUCT_OFFSET (GObjectClass, notify),
NULL, NULL,
g_cclosure_marshal_VOID__PARAM,
G_TYPE_NONE,
1, G_TYPE_PARAM);
}
void
g_object_class_install_property (GObjectClass *class,
guint property_id,
GParamSpec *pspec)
{
guint i;
g_return_if_fail (G_IS_OBJECT_CLASS (class));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
if (pspec->flags & G_PARAM_WRITABLE)
g_return_if_fail (class->set_property != NULL);
if (pspec->flags & G_PARAM_READABLE)
g_return_if_fail (class->get_property != NULL);
g_return_if_fail (property_id > 0);
g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
if (pspec->flags & G_PARAM_CONSTRUCT)
g_return_if_fail ((pspec->flags & G_PARAM_CONSTRUCT_ONLY) == 0);
if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
g_return_if_fail (pspec->flags & G_PARAM_WRITABLE);
/* expensive paranoia checks ;( */
for (i = 0; i < class->n_property_specs; i++)
if (PARAM_SPEC_PARAM_ID (class->property_specs[i]) == property_id)
{
g_warning (G_STRLOC ": class `%s' already contains a property `%s' with id %u, "
"cannot install property `%s'",
G_OBJECT_CLASS_NAME (class),
class->property_specs[i]->name,
property_id,
pspec->name);
return;
}
if (g_param_spec_pool_lookup (pspec_pool, pspec->name, G_OBJECT_CLASS_TYPE (class), FALSE))
{
g_warning (G_STRLOC ": class `%s' already contains a property named `%s'",
G_OBJECT_CLASS_NAME (class),
pspec->name);
return;
}
g_param_spec_ref (pspec);
g_param_spec_sink (pspec);
g_param_spec_set_qdata (pspec, quark_property_id, GUINT_TO_POINTER (property_id));
g_param_spec_pool_insert (pspec_pool, pspec, G_OBJECT_CLASS_TYPE (class));
i = class->n_property_specs++;
class->property_specs = g_renew (GParamSpec*, class->property_specs, class->n_property_specs);
class->property_specs[i] = pspec;
if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
class->construct_properties = g_slist_prepend (class->construct_properties, pspec);
/* for property overrides of construct poperties, we have to get rid
* of the overidden inherited construct property
*/
pspec = g_param_spec_pool_lookup (pspec_pool, pspec->name, g_type_parent (G_OBJECT_CLASS_TYPE (class)), TRUE);
if (pspec && pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
class->construct_properties = g_slist_remove (class->construct_properties, pspec);
}
GParamSpec*
g_object_class_find_property (GObjectClass *class,
const gchar *property_name)
{
g_return_val_if_fail (G_IS_OBJECT_CLASS (class), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
return g_param_spec_pool_lookup (pspec_pool,
property_name,
G_OBJECT_CLASS_TYPE (class),
TRUE);
}
static void
free_notify_queue (gpointer data)
{
NotifyQueue *nqueue = data;
g_slist_free (nqueue->pspecs);
g_free (nqueue);
}
static inline NotifyQueue*
object_freeze_notifies (GObject *object)
{
NotifyQueue *nqueue;
nqueue = g_object_get_qdata (object, quark_notify_queue);
if (!nqueue)
{
nqueue = g_new0 (NotifyQueue, 1);
g_object_set_qdata_full (object, quark_notify_queue, nqueue, free_notify_queue);
}
nqueue->freeze_count++;
return nqueue;
}
static inline void
object_queue_property (GObject *object,
GParamSpec *pspec,
NotifyQueue *nqueue)
{
if (pspec->flags & G_PARAM_READABLE)
{
/* we will dedup later */
nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
nqueue->n_pspecs++;
}
}
static void
g_object_init (GObject *object)
{
object->ref_count = 1;
g_datalist_init (&object->qdata);
/* freeze object's notification queue, g_object_new_valist() takes care of that */
object_freeze_notifies (object);
#ifdef G_ENABLE_DEBUG
IF_DEBUG (OBJECTS)
{
G_LOCK (debug_objects);
if (!debug_objects_ht)
debug_objects_ht = g_hash_table_new (g_direct_hash, NULL);
debug_objects_count++;
g_hash_table_insert (debug_objects_ht, object, object);
G_UNLOCK (debug_objects);
}
#endif /* G_ENABLE_DEBUG */
}
static void
g_object_do_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
g_object_do_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
g_object_last_unref (GObject *object)
{
g_return_if_fail (object->ref_count > 0);
if (object->ref_count == 1) /* may have been re-referenced meanwhile */
G_OBJECT_GET_CLASS (object)->shutdown (object);
#ifdef G_ENABLE_DEBUG
if (g_trap_object_ref == object)
G_BREAKPOINT ();
#endif /* G_ENABLE_DEBUG */
object->ref_count -= 1;
if (object->ref_count == 0) /* may have been re-referenced meanwhile */
{
g_signal_handlers_destroy (object);
g_object_set_qdata (object, quark_closure_array, NULL);
G_OBJECT_GET_CLASS (object)->finalize (object);
#ifdef G_ENABLE_DEBUG
IF_DEBUG (OBJECTS)
{
G_LOCK (debug_objects);
if (debug_objects_ht)
g_assert (g_hash_table_lookup (debug_objects_ht, object) == NULL);
G_UNLOCK (debug_objects);
}
#endif /* G_ENABLE_DEBUG */
g_type_free_instance ((GTypeInstance*) object);
}
}
static void
g_object_shutdown (GObject *object)
{
/* this function needs to be always present for unconditional
* chaining, we also might add some code here later.
* beware though, subclasses may invoke shutdown() arbitrarily.
*/
}
static void
g_object_finalize (GObject *object)
{
g_signal_handlers_destroy (object);
g_datalist_clear (&object->qdata);
#ifdef G_ENABLE_DEBUG
IF_DEBUG (OBJECTS)
{
G_LOCK (debug_objects);
g_assert (g_hash_table_lookup (debug_objects_ht, object) == object);
g_hash_table_remove (debug_objects_ht, object);
debug_objects_count--;
G_UNLOCK (debug_objects);
}
#endif /* G_ENABLE_DEBUG */
}
static inline void
object_thaw_notifies (GObject *object,
NotifyQueue *nqueue)
{
GParamSpec **pspecs;
GSList *slist;
guint n_pspecs = 0;
nqueue->freeze_count--;
if (nqueue->freeze_count)
return;
g_return_if_fail (object->ref_count > 0);
pspecs = g_new (GParamSpec*, nqueue->n_pspecs);
for (slist = nqueue->pspecs; slist; slist = slist->next)
{
GParamSpec *pspec = slist->data;
gint i = 0;
/* dedup, make pspecs in the list unique */
redo_dedup_check:
if (pspecs[i] == pspec)
continue;
if (++i < n_pspecs)
goto redo_dedup_check;
pspecs[n_pspecs++] = pspec;
}
g_object_set_qdata (object, quark_notify_queue, NULL);
if (n_pspecs)
G_OBJECT_GET_CLASS (object)->dispatch_properties_changed (object, n_pspecs, pspecs);
g_free (pspecs);
}
static void
g_object_dispatch_properties_changed (GObject *object,
guint n_pspecs,
GParamSpec **pspecs)
{
g_signal_emit (object, gobject_signals[PROPERTIES_CHANGED], 0, n_pspecs, pspecs);
}
static void
g_object_properties_changed (GObject *object,
guint n_pspecs,
GParamSpec **pspecs)
{
guint i;
for (i = 0; i < n_pspecs; i++)
g_signal_emit (object, gobject_signals[NOTIFY], g_quark_from_string (pspecs[i]->name), pspecs[i]);
}
static void
g_object_notify_property_changed (GObject *object,
GParamSpec *pspec)
{
if (0) /* FIXME */
g_message ("NOTIFICATION: property `%s' changed on object `%s'",
pspec->name,
G_OBJECT_TYPE_NAME (object));
}
void
g_object_freeze_notify (GObject *object)
{
g_return_if_fail (G_IS_OBJECT (object));
if (!object->ref_count)
return;
g_object_ref (object);
object_freeze_notifies (object);
g_object_unref (object);
}
void
g_object_notify (GObject *object,
const gchar *property_name)
{
GParamSpec *pspec;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (property_name != NULL);
if (!object->ref_count)
return;
g_object_ref (object);
pspec = g_param_spec_pool_lookup (pspec_pool,
property_name,
G_OBJECT_TYPE (object),
TRUE);
if (!pspec)
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (object),
property_name);
else
{
NotifyQueue *nqueue = object_freeze_notifies (object);
object_queue_property (object, pspec, nqueue);
object_thaw_notifies (object, nqueue);
}
g_object_unref (object);
}
void
g_object_thaw_notify (GObject *object)
{
NotifyQueue *nqueue;
g_return_if_fail (G_IS_OBJECT (object));
if (!object->ref_count)
return;
g_object_ref (object);
nqueue = g_object_get_qdata (object, quark_notify_queue);
if (!nqueue || !nqueue->freeze_count)
g_warning (G_STRLOC ": property-changed notification for %s(%p) is not frozen",
G_OBJECT_TYPE_NAME (object), object);
else
object_thaw_notifies (object, nqueue);
g_object_unref (object);
}
static inline void
object_get_property (GObject *object,
GParamSpec *pspec,
GValue *value)
{
GObjectClass *class;
class = g_type_class_peek (pspec->owner_type);
class->get_property (object, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
}
static inline void
object_set_property (GObject *object,
GParamSpec *pspec,
const GValue *value,
NotifyQueue *nqueue)
{
GValue tmp_value = { 0, };
GObjectClass *class = g_type_class_peek (pspec->owner_type);
/* provide a copy to work from, convert (if necessary) and validate */
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (!g_value_transform (value, &tmp_value))
g_warning ("unable to set property `%s' of type `%s' from value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
{
gchar *contents = g_strdup_value_contents (value);
g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
contents,
G_VALUE_TYPE_NAME (value),
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
g_free (contents);
}
else
{
class->set_property (object, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
object_queue_property (object, pspec, nqueue);
}
g_value_unset (&tmp_value);
}
gpointer
g_object_new (GType object_type,
const gchar *first_property_name,
...)
{
GObject *object;
va_list var_args;
g_return_val_if_fail (G_TYPE_IS_OBJECT (object_type), NULL);
va_start (var_args, first_property_name);
object = g_object_new_valist (object_type, first_property_name, var_args);
va_end (var_args);
return object;
}
gpointer
g_object_new_valist (GType object_type,
const gchar *first_property_name,
va_list var_args)
{
NotifyQueue *nqueue;
GObject *object;
GObjectClass *class;
const gchar *name;
GObjectConstructParam *cparams = NULL, *nparams = NULL;
guint n_cparams = 0, n_nparams = 0;
GSList *clist;
g_return_val_if_fail (G_TYPE_IS_OBJECT (object_type), NULL);
class = g_type_class_ref (object_type);
clist = g_slist_copy (class->construct_properties);
/* collect parameters, sort into construction and normal ones */
name = first_property_name;
while (name)
{
GValue *value;
GParamSpec *pspec;
gchar *error = NULL;
pspec = g_param_spec_pool_lookup (pspec_pool,
name,
object_type,
TRUE);
if (!pspec)
{
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
g_type_name (object_type),
name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: property `%s' of object class `%s' is not writable",
G_STRLOC,
pspec->name,
g_type_name (object_type));
break;
}
value = g_new (GValue, 1);
value->g_type = 0;
g_value_init (value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
/* we purposely leak the value here, it might not be
* in a sane state if an error condition occoured
*/
break;
}
if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
{
guint i;
if (!n_cparams || n_cparams >= PREALLOC_CPARAMS)
cparams = g_renew (GObjectConstructParam, cparams, MAX (n_cparams + 1, PREALLOC_CPARAMS));
cparams[n_cparams].pspec = pspec;
cparams[n_cparams].value = value;
for (i = 0; i < n_cparams; i++) /* picky, aren't we? ;) */
if (cparams[i].pspec == pspec)
g_warning (G_STRLOC ": construct property \"%s\" for object `%s' is being set twice",
pspec->name, g_type_name (object_type));
n_cparams++;
clist = g_slist_remove (clist, pspec); /* FIXME: unique */
}
else
{
if (!n_nparams || n_nparams >= PREALLOC_CPARAMS)
nparams = g_renew (GObjectConstructParam, nparams, MAX (n_nparams + 1, PREALLOC_CPARAMS));
nparams[n_nparams].pspec = pspec;
nparams[n_nparams].value = value;
n_nparams++;
}
name = va_arg (var_args, gchar*);
}
/* construct object from construction parameters */
while (clist)
{
GSList *tmp = clist->next;
GParamSpec *pspec = clist->data;
GValue *value = g_new (GValue, 1);
value->g_type = 0;
g_value_init (value, G_PARAM_SPEC_VALUE_TYPE (pspec));
g_param_value_set_default (pspec, value);
if (!n_cparams || n_cparams >= PREALLOC_CPARAMS)
cparams = g_renew (GObjectConstructParam, cparams, MAX (n_cparams + 1, PREALLOC_CPARAMS));
cparams[n_cparams].pspec = pspec;
cparams[n_cparams].value = value;
n_cparams++;
g_slist_free_1 (clist);
clist = tmp;
}
object = class->constructor (object_type, n_cparams, cparams);
/* free construction values */
while (n_cparams--)
{
g_value_unset (cparams[n_cparams].value);
g_free (cparams[n_cparams].value);
}
g_free (cparams);
/* release g_object_init() notification queue freeze_count */
nqueue = object_freeze_notifies (object);
nqueue->freeze_count--;
/* set remaining properties */
cparams = nparams;
while (n_nparams--)
{
GValue *value = nparams->value;
GParamSpec *pspec = nparams->pspec;
nparams++;
object_set_property (object, pspec, value, nqueue);
g_value_unset (value);
g_free (value);
}
g_free (cparams);
g_type_class_unref (class);
/* release our own freeze count and handle notifications */
object_thaw_notifies (object, nqueue);
return object;
}
static GObject*
g_object_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GObject *object;
/* create object */
object = (GObject*) g_type_create_instance (type);
/* set construction parameters */
if (n_construct_properties)
{
NotifyQueue *nqueue = object_freeze_notifies (object);
/* set construct properties */
while (n_construct_properties--)
{
GValue *value = construct_params->value;
GParamSpec *pspec = construct_params->pspec;
construct_params++;
object_set_property (object, pspec, value, nqueue);
}
nqueue->freeze_count--;
/* the notification queue is still frozen from g_object_init(), so
* we don't need to handle it here, g_object_new_valist() takes
* care of that
*/
}
return object;
}
void
g_object_set_valist (GObject *object,
const gchar *first_property_name,
va_list var_args)
{
NotifyQueue *nqueue;
const gchar *name;
g_return_if_fail (G_IS_OBJECT (object));
g_object_ref (object);
nqueue = object_freeze_notifies (object);
name = first_property_name;
while (name)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error = NULL;
pspec = g_param_spec_pool_lookup (pspec_pool,
name,
G_OBJECT_TYPE (object),
TRUE);
if (!pspec)
{
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (object),
name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: property `%s' of object class `%s' is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (object));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
/* we purposely leak the value here, it might not be
* in a sane state if an error condition occoured
*/
break;
}
object_set_property (object, pspec, &value, nqueue);
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
object_thaw_notifies (object, nqueue);
g_object_unref (object);
}
void
g_object_get_valist (GObject *object,
const gchar *first_property_name,
va_list var_args)
{
const gchar *name;
g_return_if_fail (G_IS_OBJECT (object));
g_object_ref (object);
name = first_property_name;
while (name)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error;
pspec = g_param_spec_pool_lookup (pspec_pool,
name,
G_OBJECT_TYPE (object),
TRUE);
if (!pspec)
{
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (object),
name);
break;
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_warning ("%s: property `%s' of object class `%s' is not readable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (object));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
object_get_property (object, pspec, &value);
G_VALUE_LCOPY (&value, var_args, G_VALUE_NOCOPY_CONTENTS, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
g_value_unset (&value);
break;
}
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
g_object_unref (object);
}
gpointer
g_object_set (gpointer _object,
const gchar *first_property_name,
...)
{
GObject *object = _object;
va_list var_args;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
va_start (var_args, first_property_name);
g_object_set_valist (object, first_property_name, var_args);
va_end (var_args);
return object;
}
void
g_object_get (gpointer _object,
const gchar *first_property_name,
...)
{
GObject *object = _object;
va_list var_args;
g_return_if_fail (G_IS_OBJECT (object));
va_start (var_args, first_property_name);
g_object_get_valist (object, first_property_name, var_args);
va_end (var_args);
}
void
g_object_set_property (GObject *object,
const gchar *property_name,
const GValue *value)
{
NotifyQueue *nqueue;
GParamSpec *pspec;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
g_object_ref (object);
nqueue = object_freeze_notifies (object);
pspec = g_param_spec_pool_lookup (pspec_pool,
property_name,
G_OBJECT_TYPE (object),
TRUE);
if (!pspec)
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (object),
property_name);
else
object_set_property (object, pspec, value, nqueue);
object_thaw_notifies (object, nqueue);
g_object_unref (object);
}
void
g_object_get_property (GObject *object,
const gchar *property_name,
GValue *value)
{
GParamSpec *pspec;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
g_object_ref (object);
pspec = g_param_spec_pool_lookup (pspec_pool,
property_name,
G_OBJECT_TYPE (object),
TRUE);
if (!pspec)
g_warning ("%s: object class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (object),
property_name);
else
{
GValue *prop_value, tmp_value = { 0, };
/* auto-conversion of the callers value type
*/
if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
{
g_value_reset (value);
prop_value = value;
}
else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
{
g_warning ("can't retrive property `%s' of type `%s' as value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
g_object_unref (object);
return;
}
else
{
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
prop_value = &tmp_value;
}
object_get_property (object, pspec, prop_value);
if (prop_value != value)
{
g_value_transform (prop_value, value);
g_value_unset (&tmp_value);
}
}
g_object_unref (object);
}
gpointer
g_object_connect (gpointer _object,
const gchar *signal_spec,
...)
{
GObject *object = _object;
va_list var_args;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, object);
va_start (var_args, signal_spec);
while (signal_spec)
{
gpointer callback = va_arg (var_args, gpointer);
gpointer data = va_arg (var_args, gpointer);
guint sid;
if (strncmp (signal_spec, "signal::", 8) == 0)
sid = g_signal_connect_data (object, signal_spec + 8,
callback, data, NULL,
FALSE, FALSE);
else if (strncmp (signal_spec, "swapped_signal::", 16) == 0)
sid = g_signal_connect_data (object, signal_spec + 16,
callback, data, NULL,
TRUE, FALSE);
else if (strncmp (signal_spec, "signal_after::", 14) == 0)
sid = g_signal_connect_data (object, signal_spec + 14,
callback, data, NULL,
FALSE, TRUE);
else if (strncmp (signal_spec, "swapped_signal_after::", 22) == 0)
sid = g_signal_connect_data (object, signal_spec + 22,
callback, data, NULL,
TRUE, TRUE);
else
{
g_warning ("%s: invalid signal spec \"%s\"", G_STRLOC, signal_spec);
break;
}
signal_spec = va_arg (var_args, gchar*);
}
va_end (var_args);
return object;
}
gpointer
g_object_disconnect (gpointer _object,
const gchar *signal_spec,
...)
{
GObject *object = _object;
va_list var_args;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, object);
va_start (var_args, signal_spec);
while (signal_spec)
{
gpointer callback = va_arg (var_args, gpointer);
gpointer data = va_arg (var_args, gpointer);
guint sid = 0, detail = 0, mask = 0;
if (strncmp (signal_spec, "any_signal::", 12) == 0)
{
signal_spec += 12;
mask = G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA;
}
else if (strcmp (signal_spec, "any_signal") == 0)
{
signal_spec += 10;
mask = G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA;
}
else
{
g_warning ("%s: invalid signal spec \"%s\"", G_STRLOC, signal_spec);
break;
}
if ((mask & G_SIGNAL_MATCH_ID) &&
!g_signal_parse_name (signal_spec, G_OBJECT_TYPE (object), &sid, &detail, FALSE))
g_warning ("%s: invalid signal name \"%s\"", G_STRLOC, signal_spec);
else if (!g_signal_handlers_disconnect_matched (object, mask | (detail ? G_SIGNAL_MATCH_DETAIL : 0),
sid, detail,
NULL, callback, data))
g_warning (G_STRLOC ": signal handler %p(%p) is not connected", callback, data);
signal_spec = va_arg (var_args, gchar*);
}
va_end (var_args);
return object;
}
gpointer
g_object_ref (gpointer _object)
{
GObject *object = _object;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, NULL);
#ifdef G_ENABLE_DEBUG
if (g_trap_object_ref == object)
G_BREAKPOINT ();
#endif /* G_ENABLE_DEBUG */
object->ref_count += 1;
return object;
}
void
g_object_unref (gpointer _object)
{
GObject *object = _object;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (object->ref_count > 0);
#ifdef G_ENABLE_DEBUG
if (g_trap_object_ref == object)
G_BREAKPOINT ();
#endif /* G_ENABLE_DEBUG */
if (object->ref_count > 1)
object->ref_count -= 1;
else
g_object_last_unref (object);
}
gpointer
g_object_get_qdata (GObject *object,
GQuark quark)
{
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
return quark ? g_datalist_id_get_data (&object->qdata, quark) : NULL;
}
void
g_object_set_qdata (GObject *object,
GQuark quark,
gpointer data)
{
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (quark > 0);
g_datalist_id_set_data (&object->qdata, quark, data);
}
void
g_object_set_qdata_full (GObject *object,
GQuark quark,
gpointer data,
GDestroyNotify destroy)
{
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (quark > 0);
g_datalist_id_set_data_full (&object->qdata, quark, data, data ? destroy : NULL);
}
gpointer
g_object_steal_qdata (GObject *object,
GQuark quark)
{
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (quark > 0, NULL);
return g_datalist_id_remove_no_notify (&object->qdata, quark);
}
gpointer
g_object_get_data (GObject *object,
const gchar *key)
{
GQuark quark;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (key != NULL, NULL);
quark = g_quark_try_string (key);
return quark ? g_datalist_id_get_data (&object->qdata, quark) : NULL;
}
void
g_object_set_data (GObject *object,
const gchar *key,
gpointer data)
{
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (key != NULL);
g_datalist_id_set_data (&object->qdata, g_quark_from_string (key), data);
}
void
g_object_set_data_full (GObject *object,
const gchar *key,
gpointer data,
GDestroyNotify destroy)
{
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (key != NULL);
g_datalist_id_set_data_full (&object->qdata, g_quark_from_string (key), data, data ? destroy : NULL);
}
gpointer
g_object_steal_data (GObject *object,
const gchar *key)
{
GQuark quark;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (key != NULL, NULL);
quark = g_quark_try_string (key);
return quark ? g_datalist_id_remove_no_notify (&object->qdata, quark) : NULL;
}
static void
g_value_object_init (GValue *value)
{
value->data[0].v_pointer = NULL;
}
static void
g_value_object_free_value (GValue *value)
{
if (value->data[0].v_pointer)
g_object_unref (value->data[0].v_pointer);
}
static void
g_value_object_copy_value (const GValue *src_value,
GValue *dest_value)
{
if (src_value->data[0].v_pointer)
dest_value->data[0].v_pointer = g_object_ref (src_value->data[0].v_pointer);
else
dest_value->data[0].v_pointer = NULL;
}
static void
g_value_object_transform_value (const GValue *src_value,
GValue *dest_value)
{
if (src_value->data[0].v_pointer && g_type_is_a (G_OBJECT_TYPE (src_value->data[0].v_pointer), G_VALUE_TYPE (dest_value)))
dest_value->data[0].v_pointer = g_object_ref (src_value->data[0].v_pointer);
else
dest_value->data[0].v_pointer = NULL;
}
static gpointer
g_value_object_peek_pointer (const GValue *value)
{
return value->data[0].v_pointer;
}
static gchar*
g_value_object_collect_value (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
if (collect_values[0].v_pointer)
{
GObject *object = collect_values[0].v_pointer;
if (object->g_type_instance.g_class == NULL)
return g_strconcat ("invalid unclassed object pointer for value type `",
G_VALUE_TYPE_NAME (value),
"'",
NULL);
else if (!g_value_type_compatible (G_OBJECT_TYPE (object), G_VALUE_TYPE (value)))
return g_strconcat ("invalid object type `",
G_OBJECT_TYPE_NAME (object),
"' for value type `",
G_VALUE_TYPE_NAME (value),
"'",
NULL);
/* never honour G_VALUE_NOCOPY_CONTENTS for ref-counted types */
value->data[0].v_pointer = g_object_ref (object);
}
else
value->data[0].v_pointer = NULL;
return NULL;
}
static gchar*
g_value_object_lcopy_value (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
GObject **object_p = collect_values[0].v_pointer;
if (!object_p)
return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value));
if (!value->data[0].v_pointer)
*object_p = NULL;
else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
*object_p = value->data[0].v_pointer;
else
*object_p = g_object_ref (value->data[0].v_pointer);
return NULL;
}
void
g_value_set_object (GValue *value,
GObject *v_object)
{
g_return_if_fail (G_VALUE_HOLDS_OBJECT (value));
if (value->data[0].v_pointer)
{
g_object_unref (value->data[0].v_pointer);
value->data[0].v_pointer = NULL;
}
if (v_object)
{
g_return_if_fail (G_IS_OBJECT (v_object));
g_return_if_fail (g_value_type_compatible (G_OBJECT_TYPE (v_object), G_VALUE_TYPE (value)));
value->data[0].v_pointer = v_object;
g_object_ref (value->data[0].v_pointer);
}
}
gpointer
g_value_get_object (const GValue *value)
{
g_return_val_if_fail (G_VALUE_HOLDS_OBJECT (value), NULL);
return value->data[0].v_pointer;
}
GObject*
g_value_dup_object (const GValue *value)
{
g_return_val_if_fail (G_VALUE_HOLDS_OBJECT (value), NULL);
return value->data[0].v_pointer ? g_object_ref (value->data[0].v_pointer) : NULL;
}
guint
g_signal_connect_object (gpointer instance,
const gchar *detailed_signal,
GCallback c_handler,
gpointer gobject,
gboolean swapped,
gboolean after)
{
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (instance), 0);
g_return_val_if_fail (detailed_signal != NULL, 0);
g_return_val_if_fail (c_handler != NULL, 0);
if (gobject)
{
GClosure *closure;
g_return_val_if_fail (G_IS_OBJECT (gobject), 0);
closure = (swapped ? g_cclosure_new_object_swap : g_cclosure_new_object) (c_handler, gobject);
return g_signal_connect_closure (instance, detailed_signal, closure, after);
}
else
return g_signal_connect_data (instance, detailed_signal, c_handler, NULL, NULL, swapped, after);
}
typedef struct {
GObject *object;
guint n_closures;
GClosure *closures[1]; /* flexible array */
} CArray;
static void
object_remove_closure (gpointer data,
GClosure *closure)
{
GObject *object = data;
CArray *carray = g_object_get_qdata (object, quark_closure_array);
guint i;
for (i = 0; i < carray->n_closures; i++)
if (carray->closures[i] == closure)
{
carray->n_closures--;
if (i < carray->n_closures)
carray->closures[i] = carray->closures[carray->n_closures];
return;
}
g_assert_not_reached ();
}
static void
destroy_closure_array (gpointer data)
{
CArray *carray = data;
GObject *object = carray->object;
guint i, n = carray->n_closures;
for (i = 0; i < n; i++)
{
GClosure *closure = carray->closures[i];
/* removing object_remove_closure() upfront is probably faster than
* letting it fiddle with quark_closure_array which is empty anyways
*/
g_closure_remove_invalidate_notifier (closure, object, object_remove_closure);
g_closure_invalidate (closure);
}
g_free (carray);
}
void
g_object_watch_closure (GObject *object,
GClosure *closure)
{
CArray *carray;
g_return_if_fail (G_IS_OBJECT (object));
g_return_if_fail (closure != NULL);
g_return_if_fail (closure->is_invalid == FALSE);
g_return_if_fail (closure->in_marshal == FALSE);
g_return_if_fail (object->ref_count > 0); /* this doesn't work on finalizing objects */
g_closure_add_invalidate_notifier (closure, object, object_remove_closure);
g_closure_add_marshal_guards (closure,
object, (GClosureNotify) g_object_ref,
object, (GClosureNotify) g_object_unref);
carray = g_object_steal_qdata (object, quark_closure_array);
if (!carray)
{
carray = g_renew (CArray, NULL, 1);
carray->object = object;
carray->n_closures = 1;
carray->closures[0] = closure;
g_object_set_qdata_full (object, quark_closure_array, carray, destroy_closure_array);
}
else
{
guint i = carray->n_closures++;
carray = g_realloc (carray, sizeof (*carray) + sizeof (carray->closures[0]) * i);
carray->closures[i] = closure;
g_object_set_qdata_full (object, quark_closure_array, carray, destroy_closure_array);
}
}
GClosure*
g_closure_new_object (guint sizeof_closure,
GObject *object)
{
GClosure *closure;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, NULL); /* this doesn't work on finalizing objects */
closure = g_closure_new_simple (sizeof_closure, object);
g_object_watch_closure (object, closure);
return closure;
}
GClosure*
g_cclosure_new_object (GCallback callback_func,
gpointer _object)
{
GObject *object = _object;
GClosure *closure;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, NULL); /* this doesn't work on finalizing objects */
g_return_val_if_fail (callback_func != NULL, NULL);
closure = g_cclosure_new (callback_func, object, NULL);
g_object_watch_closure (object, closure);
return closure;
}
GClosure*
g_cclosure_new_object_swap (GCallback callback_func,
gpointer _object)
{
GObject *object = _object;
GClosure *closure;
g_return_val_if_fail (G_IS_OBJECT (object), NULL);
g_return_val_if_fail (object->ref_count > 0, NULL); /* this doesn't work on finalizing objects */
g_return_val_if_fail (callback_func != NULL, NULL);
closure = g_cclosure_new_swap (callback_func, object, NULL);
g_object_watch_closure (object, closure);
return closure;
}
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