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gtk2/gtk/gtkobject.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "gtkobject.h"
#include "gtksignal.h"
#define OBJECT_DATA_ID_CHUNK 1024
enum {
DESTROY,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_USER_DATA,
ARG_SIGNAL,
ARG_OBJECT_SIGNAL
};
typedef struct _GtkObjectData GtkObjectData;
typedef struct _GtkArgInfo GtkArgInfo;
struct _GtkObjectData
{
guint id;
gpointer data;
GtkDestroyNotify destroy;
GtkObjectData *next;
};
struct _GtkArgInfo
{
char *name;
GtkType type;
GtkType class_type;
guint arg_flags;
guint arg_id;
guint seq_id;
};
static void gtk_object_class_init (GtkObjectClass *klass);
static void gtk_object_init (GtkObject *object);
static void gtk_object_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_object_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_object_shutdown (GtkObject *object);
static void gtk_object_real_destroy (GtkObject *object);
static void gtk_object_finalize (GtkObject *object);
static void gtk_object_notify_weaks (GtkObject *object);
static void gtk_object_data_destroy (GtkObjectData *odata);
static guint* gtk_object_data_id_alloc (void);
GtkArg* gtk_object_collect_args (guint *nargs,
va_list args1,
va_list args2);
static guint object_signals[LAST_SIGNAL] = { 0 };
static GHashTable *object_data_ht = NULL;
static GMemChunk *object_data_mem_chunk = NULL;
static GSList *object_data_id_list = NULL;
static guint object_data_id_index = 0;
static GHashTable *arg_info_ht = NULL;
static const gchar *user_data_key = "user_data";
static guint user_data_key_id = 0;
static const gchar *weakrefs_key = "gtk-weakrefs";
static guint weakrefs_key_id = 0;
#ifdef G_ENABLE_DEBUG
static guint obj_count = 0;
static GHashTable *living_objs_ht = NULL;
static void
gtk_object_debug_foreach (gpointer key, gpointer value, gpointer user_data)
{
GtkObject *object;
object = (GtkObject*) value;
g_print ("GTK-DEBUG: %p: %s ref_count=%d%s%s\n",
object,
gtk_type_name (GTK_OBJECT_TYPE (object)),
object->ref_count,
GTK_OBJECT_FLOATING (object) ? " (floating)" : "",
GTK_OBJECT_DESTROYED (object) ? " (destroyed)" : "");
}
static void
gtk_object_debug (void)
{
g_hash_table_foreach (living_objs_ht, gtk_object_debug_foreach, NULL);
g_print ("GTK-DEBUG: living objects count = %d\n", obj_count);
}
static guint
gtk_object_pointer_hash (const gpointer v)
{
gint i;
i = (gint) v;
return i;
}
#endif /* G_ENABLE_DEBUG */
/****************************************************
* GtkObject type, class and instance initialization
*
****************************************************/
void
gtk_object_init_type ()
{
GtkType object_type = 0;
GtkTypeInfo object_info =
{
"GtkObject",
sizeof (GtkObject),
sizeof (GtkObjectClass),
(GtkClassInitFunc) gtk_object_class_init,
(GtkObjectInitFunc) gtk_object_init,
gtk_object_set_arg,
gtk_object_get_arg,
};
object_type = gtk_type_unique (0, &object_info);
g_assert (object_type == GTK_TYPE_OBJECT);
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
ATEXIT (gtk_object_debug);
#endif /* G_ENABLE_DEBUG */
}
GtkType
gtk_object_get_type ()
{
return GTK_TYPE_OBJECT;
}
static void
gtk_object_class_init (GtkObjectClass *class)
{
class->signals = NULL;
class->nsignals = 0;
class->n_args = 0;
gtk_object_add_arg_type ("GtkObject::user_data",
GTK_TYPE_POINTER,
GTK_ARG_READWRITE,
ARG_USER_DATA);
gtk_object_add_arg_type ("GtkObject::signal",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_SIGNAL);
gtk_object_add_arg_type ("GtkObject::object_signal",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_OBJECT_SIGNAL);
object_signals[DESTROY] =
gtk_signal_new ("destroy",
GTK_RUN_LAST,
class->type,
GTK_SIGNAL_OFFSET (GtkObjectClass, destroy),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (class, object_signals, LAST_SIGNAL);
class->shutdown = gtk_object_shutdown;
class->destroy = gtk_object_real_destroy;
class->finalize = gtk_object_finalize;
}
static void
gtk_object_init (GtkObject *object)
{
GTK_OBJECT_FLAGS (object) = GTK_FLOATING;
object->ref_count = 1;
object->object_data = NULL;
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
obj_count++;
if (!living_objs_ht)
living_objs_ht = g_hash_table_new (gtk_object_pointer_hash, NULL);
g_hash_table_insert (living_objs_ht, object, object);
}
#endif /* G_ENABLE_DEBUG */
}
/********************************************
* Functions to end a GtkObject's life time
*
********************************************/
void
gtk_object_destroy (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!GTK_OBJECT_DESTROYED (object))
{
/* we will hold a reference on the object in this place, so
* to ease all classes shutdown and destroy implementations.
* i.e. they don't have to bother about referencing at all.
*/
gtk_object_ref (object);
object->klass->shutdown (object);
gtk_object_unref (object);
}
}
static void
gtk_object_shutdown (GtkObject *object)
{
GTK_OBJECT_SET_FLAGS (object, GTK_DESTROYED);
gtk_signal_emit (object, object_signals[DESTROY]);
}
static void
gtk_object_real_destroy (GtkObject *object)
{
gtk_signal_handlers_destroy (object);
}
static void
gtk_object_finalize (GtkObject *object)
{
GtkObjectData *odata, *next;
gtk_object_notify_weaks (object);
odata = object->object_data;
while (odata)
{
next = odata->next;
gtk_object_data_destroy (odata);
odata = next;
}
g_free (object);
}
/*****************************************
* GtkObject argument handlers
*
*****************************************/
static void
gtk_object_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
switch (arg_id)
{
case ARG_USER_DATA:
gtk_object_set_user_data (object, GTK_VALUE_POINTER (*arg));
break;
case ARG_SIGNAL:
if ((arg->name[9 + 2 + 6] != ':') || (arg->name[9 + 2 + 7] != ':'))
{
g_warning ("invalid signal argument: \"%s\"\n", arg->name);
arg->type = GTK_TYPE_INVALID;
return;
}
gtk_signal_connect (object, arg->name + 9 + 2 + 6 + 2,
(GtkSignalFunc) GTK_VALUE_SIGNAL (*arg).f,
GTK_VALUE_SIGNAL (*arg).d);
break;
case ARG_OBJECT_SIGNAL:
if ((arg->name[9 + 2 + 13] != ':') || (arg->name[9 + 2 + 14] != ':'))
{
g_warning ("invalid signal argument: \"%s\"\n", arg->name);
arg->type = GTK_TYPE_INVALID;
return;
}
gtk_signal_connect_object (object, arg->name + 9 + 2 + 13 + 2,
(GtkSignalFunc) GTK_VALUE_SIGNAL (*arg).f,
(GtkObject*) GTK_VALUE_SIGNAL (*arg).d);
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gtk_object_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
switch (arg_id)
{
case ARG_USER_DATA:
GTK_VALUE_POINTER (*arg) = gtk_object_get_user_data (object);
break;
case ARG_SIGNAL:
case ARG_OBJECT_SIGNAL:
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/*****************************************
* gtk_object_class_add_signals:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_class_add_signals (GtkObjectClass *class,
guint *signals,
guint nsignals)
{
guint *new_signals;
guint i;
g_return_if_fail (class != NULL);
new_signals = g_new (guint, class->nsignals + nsignals);
for (i = 0; i < class->nsignals; i++)
new_signals[i] = class->signals[i];
for (i = 0; i < nsignals; i++)
new_signals[class->nsignals + i] = signals[i];
g_free (class->signals);
class->signals = new_signals;
class->nsignals += nsignals;
}
/*****************************************
* gtk_object_class_add_user_signal:
*
* arguments:
*
* results:
*****************************************/
guint
gtk_object_class_add_user_signal (GtkObjectClass *class,
const gchar *name,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...)
{
GtkType *params;
guint i;
va_list args;
guint signal_id;
g_return_val_if_fail (class != NULL, 0);
if (nparams > 0)
{
params = g_new (GtkType, nparams);
va_start (args, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg (args, GtkType);
va_end (args);
}
else
params = NULL;
signal_id = gtk_signal_newv (name,
0,
class->type,
0,
marshaller,
return_val,
nparams,
params);
g_free (params);
if (signal_id)
gtk_object_class_add_signals (class, &signal_id, 1);
return signal_id;
}
/*****************************************
* gtk_object_sink:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_sink (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (GTK_OBJECT_FLOATING (object))
{
GTK_OBJECT_UNSET_FLAGS (object, GTK_FLOATING);
gtk_object_unref (object);
}
}
/*****************************************
* Weak references.
*
* Weak refs are very similar to the old "destroy" signal. They allow
* one to register a callback that is called when the weakly
* referenced object is finalized.
*
* They are not implemented as a signal because they really are
* special and need to be used with great care. Unlike signals, which
* should be able to execute any code whatsoever.
*
* A weakref callback is not allowed to retain a reference to the
* object. Object data keys may be retrieved in a weak reference
* callback.
*
* A weakref callback is called at most once.
*
*****************************************/
typedef struct _GtkWeakRef GtkWeakRef;
struct _GtkWeakRef
{
GtkWeakRef *next;
GtkDestroyNotify notify;
gpointer data;
};
void
gtk_object_weakref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data)
{
GtkWeakRef *weak;
g_return_if_fail (object != NULL);
g_return_if_fail (notify != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!weakrefs_key_id)
weakrefs_key_id = gtk_object_data_force_id (weakrefs_key);
weak = g_new (GtkWeakRef, 1);
weak->next = gtk_object_get_data_by_id (object, weakrefs_key_id);
weak->notify = notify;
weak->data = data;
gtk_object_set_data_by_id (object, weakrefs_key_id, weak);
}
void
gtk_object_weakunref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data)
{
GtkWeakRef *weaks, *w, **wp;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!weakrefs_key_id)
return;
weaks = gtk_object_get_data_by_id (object, weakrefs_key_id);
for (wp = &weaks; *wp; wp = &(*wp)->next)
{
w = *wp;
if (w->notify == notify && w->data == data)
{
if (w == weaks)
gtk_object_set_data_by_id (object, weakrefs_key_id, w->next);
else
*wp = w->next;
g_free (w);
return;
}
}
}
static void
gtk_object_notify_weaks (GtkObject *object)
{
if (weakrefs_key_id)
{
GtkWeakRef *w1, *w2;
w1 = gtk_object_get_data_by_id (object, weakrefs_key_id);
while (w1)
{
w1->notify (w1->data);
w2 = w1->next;
g_free (w1);
w1 = w2;
}
}
}
/*****************************************
* gtk_object_new:
*
* arguments:
*
* results:
*****************************************/
GtkObject*
gtk_object_new (GtkType type,
...)
{
GtkObject *obj;
GtkArg *args;
guint nargs;
va_list args1;
va_list args2;
obj = gtk_type_new (type);
va_start (args1, type);
va_start (args2, type);
args = gtk_object_collect_args (&nargs, args1, args2);
gtk_object_setv (obj, nargs, args);
g_free (args);
va_end (args1);
va_end (args2);
return obj;
}
/*****************************************
* gtk_object_newv:
*
* arguments:
*
* results:
*****************************************/
GtkObject*
gtk_object_newv (GtkType type,
guint nargs,
GtkArg *args)
{
gpointer obj;
obj = gtk_type_new (type);
gtk_object_setv (obj, nargs, args);
return obj;
}
/*****************************************
* gtk_object_getv:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_getv (GtkObject *object,
guint nargs,
GtkArg *args)
{
guint i;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!arg_info_ht)
return;
for (i = 0; i < nargs; i++)
{
GtkArgInfo *info;
gchar *lookup_name;
gchar *d;
/* hm, the name cutting shouldn't be needed on gets, but what the heck...
*/
lookup_name = g_strdup (args[i].name);
d = strchr (lookup_name, ':');
if (d && d[1] == ':')
{
d = strchr (d + 2, ':');
if (d)
*d = 0;
info = g_hash_table_lookup (arg_info_ht, lookup_name);
}
else
info = NULL;
if (!info)
{
g_warning ("invalid arg name: \"%s\"\n", lookup_name);
args[i].type = GTK_TYPE_INVALID;
g_free (lookup_name);
continue;
}
else if (!gtk_type_is_a (object->klass->type, info->class_type))
{
g_warning ("invalid arg for %s: \"%s\"\n", gtk_type_name (object->klass->type), lookup_name);
args[i].type = GTK_TYPE_INVALID;
g_free (lookup_name);
continue;
}
else if (! (info->arg_flags & GTK_ARG_READABLE))
{
g_warning ("arg is not supplied for read-access: \"%s\"\n", lookup_name);
args[i].type = GTK_TYPE_INVALID;
g_free (lookup_name);
continue;
}
else
g_free (lookup_name);
args[i].type = info->type;
gtk_type_get_arg (object, info->class_type, &args[i], info->arg_id);
}
}
/*****************************************
* gtk_object_query_args:
*
* arguments:
*
* results:
*****************************************/
struct _GtkQueryArgData
{
GList *arg_list;
GtkType class_type;
};
typedef struct _GtkQueryArgData GtkQueryArgData;
static void
gtk_query_arg_foreach (gpointer key,
gpointer value,
gpointer user_data)
{
register GtkArgInfo *info;
register GtkQueryArgData *data;
info = value;
data = user_data;
if (info->class_type == data->class_type)
data->arg_list = g_list_prepend (data->arg_list, info);
}
GtkArg*
gtk_object_query_args (GtkType class_type,
guint32 **arg_flags,
guint *nargs)
{
GtkArg *args;
GtkQueryArgData query_data;
if (arg_flags)
*arg_flags = NULL;
g_return_val_if_fail (nargs != NULL, NULL);
*nargs = 0;
g_return_val_if_fail (gtk_type_is_a (class_type, gtk_object_get_type ()), NULL);
if (!arg_info_ht)
return NULL;
/* make sure the types class has been initialized, because
* the argument setup happens in the gtk_*_class_init() functions.
*/
gtk_type_class (class_type);
query_data.arg_list = NULL;
query_data.class_type = class_type;
g_hash_table_foreach (arg_info_ht, gtk_query_arg_foreach, &query_data);
if (query_data.arg_list)
{
register GList *list;
register guint len;
list = query_data.arg_list;
len = 1;
while (list->next)
{
len++;
list = list->next;
}
g_assert (len == ((GtkObjectClass*) gtk_type_class (class_type))->n_args); /* paranoid */
args = g_new0 (GtkArg, len);
*nargs = len;
if (arg_flags)
*arg_flags = g_new (guint32, len);
do
{
GtkArgInfo *info;
info = list->data;
list = list->prev;
g_assert (info->seq_id > 0 && info->seq_id <= len); /* paranoid */
args[info->seq_id - 1].type = info->type;
args[info->seq_id - 1].name = info->name;
if (arg_flags)
(*arg_flags)[info->seq_id - 1] = info->arg_flags;
}
while (list);
g_list_free (query_data.arg_list);
}
else
args = NULL;
return args;
}
/*****************************************
* gtk_object_set:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_set (GtkObject *object,
...)
{
GtkArg *args;
guint nargs;
va_list args1;
va_list args2;
g_return_if_fail (object != NULL);
va_start (args1, object);
va_start (args2, object);
args = gtk_object_collect_args (&nargs, args1, args2);
gtk_object_setv (object, nargs, args);
g_free (args);
va_end (args1);
va_end (args2);
}
/*****************************************
* gtk_object_setv:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_setv (GtkObject *object,
guint nargs,
GtkArg *args)
{
guint i;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_OBJECT (object));
if (!arg_info_ht)
return;
for (i = 0; i < nargs; i++)
{
GtkArgInfo *info;
gchar *lookup_name;
gchar *d;
gboolean arg_ok;
lookup_name = g_strdup (args[i].name);
d = strchr (lookup_name, ':');
if (d && d[1] == ':')
{
d = strchr (d + 2, ':');
if (d)
*d = 0;
info = g_hash_table_lookup (arg_info_ht, lookup_name);
}
else
info = NULL;
arg_ok = TRUE;
if (!info)
{
g_warning ("invalid arg name: \"%s\"\n", lookup_name);
arg_ok = FALSE;
}
else if (info->type != args[i].type)
{
g_warning ("invalid arg type for: \"%s\"\n", lookup_name);
arg_ok = FALSE;
}
else if (!gtk_type_is_a (object->klass->type, info->class_type))
{
g_warning ("invalid arg for %s: \"%s\"\n", gtk_type_name (object->klass->type), lookup_name);
arg_ok = FALSE;
}
else if (! (info->arg_flags & GTK_ARG_WRITABLE))
{
g_warning ("arg is not supplied for write-access: \"%s\"\n", lookup_name);
arg_ok = FALSE;
}
g_free (lookup_name);
if (!arg_ok)
continue;
gtk_type_set_arg (object, info->class_type, &args[i], info->arg_id);
}
}
/*****************************************
* gtk_object_add_arg_type:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_add_arg_type (const char *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id)
{
GtkArgInfo *info;
gchar class_part[1024];
gchar *arg_part;
GtkType class_type;
g_return_if_fail (arg_name != NULL);
g_return_if_fail (arg_type > GTK_TYPE_NONE);
g_return_if_fail (arg_id > 0);
g_return_if_fail ((arg_flags & GTK_ARG_READWRITE) != 0);
arg_part = strchr (arg_name, ':');
if (!arg_part || (arg_part[0] != ':') || (arg_part[1] != ':'))
{
g_warning ("invalid arg name: \"%s\"\n", arg_name);
return;
}
strncpy (class_part, arg_name, (glong) (arg_part - arg_name));
class_part[(glong) (arg_part - arg_name)] = '\0';
class_type = gtk_type_from_name (class_part);
if (!class_type)
{
g_warning ("invalid class name in arg: \"%s\"\n", arg_name);
return;
}
info = g_new (GtkArgInfo, 1);
info->name = g_strdup (arg_name);
info->type = arg_type;
info->class_type = class_type;
info->arg_flags = arg_flags & (GTK_ARG_READABLE | GTK_ARG_WRITABLE);
info->arg_id = arg_id;
info->seq_id = ++((GtkObjectClass*) gtk_type_class (class_type))->n_args;
if (!arg_info_ht)
arg_info_ht = g_hash_table_new (g_str_hash, g_str_equal);
g_hash_table_insert (arg_info_ht, info->name, info);
}
/*****************************************
* gtk_object_get_arg_type:
*
* arguments:
*
* results:
*****************************************/
GtkType
gtk_object_get_arg_type (const gchar *arg_name)
{
GtkArgInfo *info;
gchar buffer[1024];
gchar *t;
if (!arg_info_ht)
return GTK_TYPE_INVALID;
t = strchr (arg_name, ':');
if (!t || (t[0] != ':') || (t[1] != ':'))
{
g_warning ("invalid arg name: \"%s\"\n", arg_name);
return GTK_TYPE_INVALID;
}
t = strchr (t + 2, ':');
if (t)
{
strncpy (buffer, arg_name, (long) (t - arg_name));
buffer[(long) (t - arg_name)] = '\0';
arg_name = buffer;
}
info = g_hash_table_lookup (arg_info_ht, (gpointer) arg_name);
if (info)
return info->type;
return GTK_TYPE_INVALID;
}
/*****************************************
* GtkObject object_data mechanism
*
*****************************************/
void
gtk_object_set_data_by_id (GtkObject *object,
guint data_id,
gpointer data)
{
g_return_if_fail (data_id > 0);
gtk_object_set_data_by_id_full (object, data_id, data, NULL);
}
void
gtk_object_set_data (GtkObject *object,
const gchar *key,
gpointer data)
{
g_return_if_fail (key != NULL);
gtk_object_set_data_by_id_full (object, gtk_object_data_force_id (key), data, NULL);
}
void
gtk_object_set_data_by_id_full (GtkObject *object,
guint data_id,
gpointer data,
GtkDestroyNotify destroy)
{
GtkObjectData *odata;
GtkObjectData *prev;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (data_id > 0);
if (!data)
{
prev = NULL;
odata = object->object_data;
while (odata)
{
if (odata->id == data_id)
{
if (prev)
prev->next = odata->next;
if (odata == object->object_data)
object->object_data = odata->next;
gtk_object_data_destroy (odata);
break;
}
prev = odata;
odata = odata->next;
}
}
else
{
odata = object->object_data;
while (odata)
{
if (odata->id == data_id)
{
if (odata->destroy)
odata->destroy (odata->data);
odata->data = data;
odata->destroy = destroy;
return;
}
odata = odata->next;
}
if (!object_data_mem_chunk)
object_data_mem_chunk = g_mem_chunk_new ("object data mem chunk",
sizeof (GtkObjectData),
1024, G_ALLOC_AND_FREE);
odata = g_chunk_new (GtkObjectData, object_data_mem_chunk);
odata->id = data_id;
odata->data = data;
odata->destroy = destroy;
odata->next = object->object_data;
object->object_data = odata;
}
}
void
gtk_object_set_data_full (GtkObject *object,
const gchar *key,
gpointer data,
GtkDestroyNotify destroy)
{
g_return_if_fail (key != NULL);
gtk_object_set_data_by_id_full (object, gtk_object_data_force_id (key), data, destroy);
}
guint
gtk_object_data_force_id (const gchar *key)
{
guint *id;
g_return_val_if_fail (key != NULL, 0);
if (!object_data_ht)
object_data_ht = g_hash_table_new (g_str_hash, g_str_equal);
id = g_hash_table_lookup (object_data_ht, (gpointer) key);
if (!id)
{
id = gtk_object_data_id_alloc ();
g_hash_table_insert (object_data_ht, g_strdup (key), id);
}
return *id;
}
gpointer
gtk_object_get_data_by_id (GtkObject *object,
guint data_id)
{
GtkObjectData *odata;
g_return_val_if_fail (object != NULL, NULL);
g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
if (data_id)
{
odata = object->object_data;
while (odata)
{
if (odata->id == data_id)
return odata->data;
odata = odata->next;
}
}
return NULL;
}
gpointer
gtk_object_get_data (GtkObject *object,
const gchar *key)
{
guint id;
g_return_val_if_fail (key != NULL, NULL);
id = gtk_object_data_try_key (key);
if (id)
return gtk_object_get_data_by_id (object, id);
return NULL;
}
guint
gtk_object_data_try_key (const gchar *key)
{
g_return_val_if_fail (key != NULL, 0);
if (object_data_ht)
{
guint *id;
id = g_hash_table_lookup (object_data_ht, (gpointer) key);
if (id)
return *id;
}
return 0;
}
void
gtk_object_remove_data_by_id (GtkObject *object,
guint data_id)
{
if (data_id)
gtk_object_set_data_by_id_full (object, data_id, NULL, NULL);
}
void
gtk_object_remove_data (GtkObject *object,
const gchar *key)
{
gint id;
g_return_if_fail (key != NULL);
id = gtk_object_data_try_key (key);
if (id)
gtk_object_set_data_by_id_full (object, id, NULL, NULL);
}
static void
gtk_object_data_destroy (GtkObjectData *odata)
{
g_return_if_fail (odata != NULL);
if (odata->destroy)
odata->destroy (odata->data);
g_mem_chunk_free (object_data_mem_chunk, odata);
}
static guint*
gtk_object_data_id_alloc ()
{
static guint next_id = 1;
guint *ids;
if (!object_data_id_list ||
(object_data_id_index == OBJECT_DATA_ID_CHUNK))
{
ids = g_new (guint, OBJECT_DATA_ID_CHUNK);
object_data_id_index = 0;
object_data_id_list = g_slist_prepend (object_data_id_list, ids);
}
else
{
ids = object_data_id_list->data;
}
ids[object_data_id_index] = next_id++;
return &ids[object_data_id_index++];
}
/*****************************************
* gtk_object_set_user_data:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_set_user_data (GtkObject *object,
gpointer data)
{
if (!user_data_key_id)
user_data_key_id = gtk_object_data_force_id (user_data_key);
gtk_object_set_data_by_id_full (object, user_data_key_id, data, NULL);
}
/*****************************************
* gtk_object_get_user_data:
*
* arguments:
*
* results:
*****************************************/
gpointer
gtk_object_get_user_data (GtkObject *object)
{
if (user_data_key_id)
return gtk_object_get_data_by_id (object, user_data_key_id);
return NULL;
}
/*****************************************
* gtk_object_check_cast:
*
* arguments:
*
* results:
*****************************************/
static gchar*
gtk_object_descriptive_type_name (GtkType type)
{
gchar *name;
name = gtk_type_name (type);
if (!name)
name = "(unknown)";
return name;
}
GtkObject*
gtk_object_check_cast (GtkObject *obj,
GtkType cast_type)
{
if (!obj)
{
g_warning ("invalid cast from (NULL) pointer to `%s'",
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (!obj->klass)
{
g_warning ("invalid unclassed pointer in cast to `%s'",
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (obj->klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in cast to `%s'",
gtk_object_descriptive_type_name (obj->klass->type),
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (!gtk_type_is_a (obj->klass->type, cast_type))
{
g_warning ("invalid cast from `%s' to `%s'",
gtk_object_descriptive_type_name (obj->klass->type),
gtk_object_descriptive_type_name (cast_type));
return obj;
}
return obj;
}
/*****************************************
* gtk_object_check_class_cast:
*
* arguments:
*
* results:
*****************************************/
GtkObjectClass*
gtk_object_check_class_cast (GtkObjectClass *klass,
GtkType cast_type)
{
if (!klass)
{
g_warning ("invalid class cast from (NULL) pointer to `%s'",
gtk_object_descriptive_type_name (cast_type));
return klass;
}
if (klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in class cast to `%s'",
gtk_object_descriptive_type_name (klass->type),
gtk_object_descriptive_type_name (cast_type));
return klass;
}
if (!gtk_type_is_a (klass->type, cast_type))
{
g_warning ("invalid class cast from `%s' to `%s'",
gtk_object_descriptive_type_name (klass->type),
gtk_object_descriptive_type_name (cast_type));
return klass;
}
return klass;
}
/*****************************************
* gtk_object_collect_args:
*
* arguments:
*
* results:
*****************************************/
GtkArg*
gtk_object_collect_args (guint *nargs,
va_list args1,
va_list args2)
{
GtkArg *args;
GtkType type;
gchar *name;
gint done;
gint i, n;
n = 0;
done = FALSE;
while (!done)
{
name = va_arg (args1, char *);
if (!name)
{
done = TRUE;
continue;
}
type = gtk_object_get_arg_type (name);
switch (GTK_FUNDAMENTAL_TYPE (type))
{
case GTK_TYPE_INVALID:
g_warning ("invalid arg name: \"%s\" %x\n", name, type);
(void) va_arg (args1, long);
continue;
case GTK_TYPE_NONE:
break;
case GTK_TYPE_CHAR:
case GTK_TYPE_BOOL:
case GTK_TYPE_INT:
case GTK_TYPE_UINT:
case GTK_TYPE_ENUM:
case GTK_TYPE_FLAGS:
(void) va_arg (args1, gint);
break;
case GTK_TYPE_LONG:
case GTK_TYPE_ULONG:
(void) va_arg (args1, glong);
break;
case GTK_TYPE_FLOAT:
(void) va_arg (args1, gfloat);
break;
case GTK_TYPE_DOUBLE:
(void) va_arg (args1, gdouble);
break;
case GTK_TYPE_STRING:
(void) va_arg (args1, gchar*);
break;
case GTK_TYPE_POINTER:
case GTK_TYPE_BOXED:
(void) va_arg (args1, gpointer);
break;
case GTK_TYPE_SIGNAL:
(void) va_arg (args1, GtkFunction);
(void) va_arg (args1, gpointer);
break;
case GTK_TYPE_FOREIGN:
(void) va_arg (args1, gpointer);
(void) va_arg (args1, GtkDestroyNotify);
break;
case GTK_TYPE_CALLBACK:
(void) va_arg (args1, GtkCallbackMarshal);
(void) va_arg (args1, gpointer);
(void) va_arg (args1, GtkDestroyNotify);
break;
case GTK_TYPE_C_CALLBACK:
(void) va_arg (args1, GtkFunction);
(void) va_arg (args1, gpointer);
break;
case GTK_TYPE_ARGS:
(void) va_arg (args1, gint);
(void) va_arg (args1, GtkArg*);
break;
case GTK_TYPE_OBJECT:
(void) va_arg (args1, GtkObject*);
break;
default:
g_error ("unsupported type %s in args", gtk_type_name (type));
break;
}
n += 1;
}
*nargs = n;
args = NULL;
if (n > 0)
{
args = g_new0 (GtkArg, n);
for (i = 0; i < n; i++)
{
args[i].name = va_arg (args2, char *);
args[i].type = gtk_object_get_arg_type (args[i].name);
switch (GTK_FUNDAMENTAL_TYPE (args[i].type))
{
case GTK_TYPE_INVALID:
(void) va_arg (args2, long);
i -= 1;
continue;
case GTK_TYPE_NONE:
break;
case GTK_TYPE_CHAR:
GTK_VALUE_CHAR(args[i]) = va_arg (args2, gint);
break;
case GTK_TYPE_BOOL:
GTK_VALUE_BOOL(args[i]) = va_arg (args2, gint);
break;
case GTK_TYPE_INT:
GTK_VALUE_INT(args[i]) = va_arg (args2, gint);
break;
case GTK_TYPE_UINT:
GTK_VALUE_UINT(args[i]) = va_arg (args2, guint);
break;
case GTK_TYPE_ENUM:
GTK_VALUE_ENUM(args[i]) = va_arg (args2, gint);
break;
case GTK_TYPE_FLAGS:
GTK_VALUE_FLAGS(args[i]) = va_arg (args2, gint);
break;
case GTK_TYPE_LONG:
GTK_VALUE_LONG(args[i]) = va_arg (args2, glong);
break;
case GTK_TYPE_ULONG:
GTK_VALUE_ULONG(args[i]) = va_arg (args2, gulong);
break;
case GTK_TYPE_FLOAT:
GTK_VALUE_FLOAT(args[i]) = va_arg (args2, gfloat);
break;
case GTK_TYPE_DOUBLE:
GTK_VALUE_DOUBLE(args[i]) = va_arg (args2, gdouble);
break;
case GTK_TYPE_STRING:
GTK_VALUE_STRING(args[i]) = va_arg (args2, gchar*);
break;
case GTK_TYPE_POINTER:
GTK_VALUE_POINTER(args[i]) = va_arg (args2, gpointer);
break;
case GTK_TYPE_BOXED:
GTK_VALUE_BOXED(args[i]) = va_arg (args2, gpointer);
break;
case GTK_TYPE_SIGNAL:
GTK_VALUE_SIGNAL(args[i]).f = va_arg (args2, GtkFunction);
GTK_VALUE_SIGNAL(args[i]).d = va_arg (args2, gpointer);
break;
case GTK_TYPE_FOREIGN:
GTK_VALUE_FOREIGN(args[i]).data = va_arg (args2, gpointer);
GTK_VALUE_FOREIGN(args[i]).notify =
va_arg (args2, GtkDestroyNotify);
break;
case GTK_TYPE_CALLBACK:
GTK_VALUE_CALLBACK(args[i]).marshal =
va_arg (args2, GtkCallbackMarshal);
GTK_VALUE_CALLBACK(args[i]).data = va_arg (args2, gpointer);
GTK_VALUE_CALLBACK(args[i]).notify =
va_arg (args2, GtkDestroyNotify);
break;
case GTK_TYPE_C_CALLBACK:
GTK_VALUE_C_CALLBACK(args[i]).func = va_arg (args2, GtkFunction);
GTK_VALUE_C_CALLBACK(args[i]).func_data =
va_arg (args2, gpointer);
break;
case GTK_TYPE_ARGS:
GTK_VALUE_ARGS(args[i]).n_args = va_arg (args2, gint);
GTK_VALUE_ARGS(args[i]).args = va_arg (args2, GtkArg*);
break;
case GTK_TYPE_OBJECT:
GTK_VALUE_OBJECT(args[i]) = va_arg (args2, GtkObject*);
g_assert (GTK_VALUE_OBJECT(args[i]) == NULL ||
GTK_CHECK_TYPE (GTK_VALUE_OBJECT(args[i]),
args[i].type));
break;
default:
g_error ("unsupported type %s in args",
gtk_type_name (args[i].type));
break;
}
}
}
return args;
}
#undef gtk_object_ref
#undef gtk_object_unref
void
gtk_object_ref (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
object->ref_count += 1;
}
void
gtk_object_unref (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (object->ref_count == 1)
gtk_object_destroy (object);
if (object->ref_count > 0)
object->ref_count -= 1;
if (object->ref_count == 0)
{
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
g_assert (g_hash_table_lookup (living_objs_ht, object) == object);
g_hash_table_remove (living_objs_ht, object);
obj_count--;
}
#endif /* G_ENABLE_DEBUG */
object->klass->finalize (object);
}
}
#ifdef G_ENABLE_DEBUG
static GtkObject *gtk_trace_object = NULL;
void
gtk_trace_referencing (gpointer *o,
const gchar *func,
guint local_frame,
guint line,
gboolean do_ref)
{
gboolean exists;
GtkObject *object = (GtkObject*) o;
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
exists = g_hash_table_lookup (living_objs_ht, object) != NULL;
if (exists &&
(object == gtk_trace_object ||
gtk_trace_object == (void*)42))
printf ("trace: object_%s: (%s:%p)->ref_count=%d%s (%s_f%02d:%d)\n",
do_ref ? "ref" : "unref",
gtk_type_name (GTK_OBJECT_TYPE (object)),
object,
object->ref_count,
do_ref ? " + 1" : " - 1 ",
func,
local_frame,
line);
if (!exists)
printf ("trace: object_%s(%p): no such object! (%s_f%02d:%d)\n",
do_ref ? "ref" : "unref",
object,
func,
local_frame,
line);
}
if (do_ref)
gtk_object_ref (object);
else
gtk_object_unref (object);
}
#endif /* G_ENABLE_DEBUG */
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