/* 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #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_real_destroy (GtkObject *object); static void gtk_object_finalize (GtkObject *object); static void gtk_object_notify_weaks (gpointer data); static void gtk_object_data_init (void); static GtkObjectData* gtk_object_data_new (void); 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 gint object_data_init = TRUE; 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"; #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 ("%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 ("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 */ /***************************************** * gtk_object_init_type: * * arguments: * * results: *****************************************/ 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; } /***************************************** * gtk_object_class_init: * * arguments: * * results: *****************************************/ 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->destroy = gtk_object_real_destroy; class->finalize = gtk_object_finalize; } /***************************************** * gtk_object_real_destroy: * * arguments: * * results: *****************************************/ static void gtk_object_real_destroy (GtkObject *object) { g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_OBJECT (object)); gtk_signal_handlers_destroy (object); } /***************************************** * gtk_object_init: * * arguments: * * results: *****************************************/ 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 */ } /***************************************** * gtk_object_set_arg: * * arguments: * * results: *****************************************/ 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; } } /***************************************** * gtk_object_get_arg: * * arguments: * * results: *****************************************/ 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 (gint, 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_finalize: * * arguments: * * results: *****************************************/ static void gtk_object_finalize (GtkObject *object) { GtkObjectData *odata, *next; odata = object->object_data; while (odata) { next = odata->next; gtk_object_data_destroy (odata); odata = next; } g_free (object); } /***************************************** * 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); } } /***************************************** * gtk_object_destroy: * * arguments: * * results: *****************************************/ 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)) { GTK_OBJECT_SET_FLAGS (object, GTK_DESTROYED); gtk_signal_emit (object, object_signals[DESTROY]); } } /***************************************** * 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, who * should be able to execute any code whatsoever. * * A weakref callback is not allowed to retain a reference to the * object. In fact, the object is no longer there at all when it is * called. * * A weakref callback is called atmost once. * *****************************************/ typedef struct _GtkWeakRef GtkWeakRef; struct _GtkWeakRef { GtkWeakRef *next; GtkDestroyNotify notify; gpointer data; }; static const gchar *weakrefs_key = "gtk-weakrefs"; 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)); weak = g_new (GtkWeakRef, 1); weak->next = gtk_object_get_data (object, weakrefs_key); weak->notify = notify; weak->data = data; gtk_object_set_data_full (object, weakrefs_key, weak, gtk_object_notify_weaks); } 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)); weaks = gtk_object_get_data (object, weakrefs_key); for (wp = &weaks; *wp; wp = &(*wp)->next) { w = *wp; if (w->notify == notify && w->data == data) { if (w == weaks) gtk_object_set_data_full (object, weakrefs_key, w->next, gtk_object_notify_weaks); else *wp = w->next; g_free (w); return; } } } static void gtk_object_notify_weaks (gpointer data) { GtkWeakRef *w1, *w2; w1 = (GtkWeakRef *)data; 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) { int i; g_return_if_fail (object != NULL); 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) { int i; g_return_if_fail (object != NULL); 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; } /***************************************** * gtk_object_set_data: * * arguments: * * results: *****************************************/ void gtk_object_set_data (GtkObject *object, const gchar *key, gpointer data) { gtk_object_set_data_full (object, key, data, NULL); } /***************************************** * gtk_object_set_data_full: * * arguments: * * results: *****************************************/ void gtk_object_set_data_full (GtkObject *object, const gchar *key, gpointer data, GtkDestroyNotify destroy) { GtkObjectData *odata; GtkObjectData *prev; guint *id; g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_OBJECT (object)); g_return_if_fail (key != NULL); if (object_data_init) gtk_object_data_init (); id = g_hash_table_lookup (object_data_ht, (gpointer) key); if (!data) { if (id) { prev = NULL; odata = object->object_data; while (odata) { if (odata->id == *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 { if (!id) { id = gtk_object_data_id_alloc (); g_hash_table_insert (object_data_ht, (gpointer) key, id); } odata = object->object_data; while (odata) { if (odata->id == *id) { odata->data = data; odata->destroy = destroy; return; } odata = odata->next; } odata = gtk_object_data_new (); odata->id = *id; odata->data = data; odata->destroy = destroy; odata->next = object->object_data; object->object_data = odata; } } /***************************************** * gtk_object_get_data: * * arguments: * * results: *****************************************/ gpointer gtk_object_get_data (GtkObject *object, const gchar *key) { GtkObjectData *odata; guint *id; g_return_val_if_fail (object != NULL, NULL); g_return_val_if_fail (GTK_IS_OBJECT (object), NULL); g_return_val_if_fail (key != NULL, NULL); if (object_data_init) gtk_object_data_init (); id = g_hash_table_lookup (object_data_ht, (gpointer) key); if (id) { odata = object->object_data; while (odata) { if (odata->id == *id) return odata->data; odata = odata->next; } } return NULL; } /***************************************** * gtk_object_remove_data: * * arguments: * * results: *****************************************/ void gtk_object_remove_data (GtkObject *object, const gchar *key) { g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_OBJECT (object)); g_return_if_fail (key != NULL); gtk_object_set_data_full (object, key, NULL, NULL); } /***************************************** * gtk_object_set_user_data: * * arguments: * * results: *****************************************/ void gtk_object_set_user_data (GtkObject *object, gpointer data) { g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_OBJECT (object)); gtk_object_set_data_full (object, user_data_key, data, NULL); } /***************************************** * gtk_object_get_user_data: * * arguments: * * results: *****************************************/ gpointer gtk_object_get_user_data (GtkObject *object) { g_return_val_if_fail (object != NULL, NULL); g_return_val_if_fail (GTK_IS_OBJECT (object), NULL); return gtk_object_get_data (object, user_data_key); } /***************************************** * 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_data_init: * * arguments: * * results: *****************************************/ static void gtk_object_data_init () { if (object_data_init) { object_data_init = FALSE; object_data_ht = g_hash_table_new (g_str_hash, g_str_equal); } } /***************************************** * gtk_object_data_new: * * arguments: * * results: *****************************************/ static GtkObjectData* gtk_object_data_new () { GtkObjectData *odata; 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 = 0; odata->data = NULL; odata->destroy = NULL; odata->next = NULL; return odata; } /***************************************** * gtk_object_data_destroy: * * arguments: * * results: *****************************************/ 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); } /***************************************** * gtk_object_data_id_alloc: * * arguments: * * results: *****************************************/ 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_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 */