1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1997-1999, 2000-2001 Tim Janik and Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
27 #include "gvaluecollector.h"
33 #define G_PARAM_SPEC_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_PARAM, GParamSpecClass))
34 #define G_PARAM_USER_MASK (~0 << G_PARAM_USER_SHIFT)
35 #define PSPEC_APPLIES_TO_VALUE(pspec, value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_PARAM_SPEC_VALUE_TYPE (pspec)))
36 #define G_SLOCK(mutex) g_static_mutex_lock (mutex)
37 #define G_SUNLOCK(mutex) g_static_mutex_unlock (mutex)
40 /* --- prototypes --- */
41 static void g_param_spec_class_base_init (GParamSpecClass *class);
42 static void g_param_spec_class_base_finalize (GParamSpecClass *class);
43 static void g_param_spec_class_init (GParamSpecClass *class,
45 static void g_param_spec_init (GParamSpec *pspec,
46 GParamSpecClass *class);
47 static void g_param_spec_finalize (GParamSpec *pspec);
48 static void value_param_init (GValue *value);
49 static void value_param_free_value (GValue *value);
50 static void value_param_copy_value (const GValue *src_value,
52 static void value_param_transform_value (const GValue *src_value,
54 static gpointer value_param_peek_pointer (const GValue *value);
55 static gchar* value_param_collect_value (GValue *value,
56 guint n_collect_values,
57 GTypeCValue *collect_values,
59 static gchar* value_param_lcopy_value (const GValue *value,
60 guint n_collect_values,
61 GTypeCValue *collect_values,
65 /* --- variables --- */
66 static GQuark quark_floating = 0;
67 G_LOCK_DEFINE_STATIC (pspec_ref_count);
70 /* --- functions --- */
72 g_param_type_init (void) /* sync with gtype.c */
74 static const GTypeFundamentalInfo finfo = {
75 (G_TYPE_FLAG_CLASSED |
76 G_TYPE_FLAG_INSTANTIATABLE |
77 G_TYPE_FLAG_DERIVABLE |
78 G_TYPE_FLAG_DEEP_DERIVABLE),
80 static const GTypeValueTable param_value_table = {
81 value_param_init, /* value_init */
82 value_param_free_value, /* value_free */
83 value_param_copy_value, /* value_copy */
84 value_param_peek_pointer, /* value_peek_pointer */
85 "p", /* collect_format */
86 value_param_collect_value, /* collect_value */
87 "p", /* lcopy_format */
88 value_param_lcopy_value, /* lcopy_value */
90 static const GTypeInfo param_spec_info = {
91 sizeof (GParamSpecClass),
93 (GBaseInitFunc) g_param_spec_class_base_init,
94 (GBaseFinalizeFunc) g_param_spec_class_base_finalize,
95 (GClassInitFunc) g_param_spec_class_init,
96 (GClassFinalizeFunc) NULL,
97 NULL, /* class_data */
101 (GInstanceInitFunc) g_param_spec_init,
107 type = g_type_register_fundamental (G_TYPE_PARAM, "GParam", ¶m_spec_info, &finfo, G_TYPE_FLAG_ABSTRACT);
108 g_assert (type == G_TYPE_PARAM);
109 g_value_register_transform_func (G_TYPE_PARAM, G_TYPE_PARAM, value_param_transform_value);
113 g_param_spec_class_base_init (GParamSpecClass *class)
118 g_param_spec_class_base_finalize (GParamSpecClass *class)
123 g_param_spec_class_init (GParamSpecClass *class,
126 quark_floating = g_quark_from_static_string ("GParamSpec-floating");
128 class->value_type = G_TYPE_NONE;
129 class->finalize = g_param_spec_finalize;
130 class->value_set_default = NULL;
131 class->value_validate = NULL;
132 class->values_cmp = NULL;
136 g_param_spec_init (GParamSpec *pspec,
137 GParamSpecClass *class)
143 pspec->value_type = class->value_type;
144 pspec->owner_type = 0;
146 pspec->ref_count = 1;
148 g_datalist_id_set_data (&pspec->qdata, quark_floating, GUINT_TO_POINTER (TRUE));
152 g_param_spec_finalize (GParamSpec *pspec)
154 g_datalist_clear (&pspec->qdata);
156 g_free (pspec->name);
157 g_free (pspec->nick);
158 g_free (pspec->blurb);
160 g_type_free_instance ((GTypeInstance*) pspec);
164 g_param_spec_ref (GParamSpec *pspec)
166 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), NULL);
168 G_LOCK (pspec_ref_count);
169 if (pspec->ref_count > 0)
171 pspec->ref_count += 1;
172 G_UNLOCK (pspec_ref_count);
176 G_UNLOCK (pspec_ref_count);
177 g_return_val_if_fail (pspec->ref_count > 0, NULL);
184 g_param_spec_unref (GParamSpec *pspec)
186 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
188 G_LOCK (pspec_ref_count);
189 if (pspec->ref_count > 0)
191 gboolean need_finalize;
193 /* sync with _sink */
194 pspec->ref_count -= 1;
195 need_finalize = pspec->ref_count == 0;
196 G_UNLOCK (pspec_ref_count);
198 G_PARAM_SPEC_GET_CLASS (pspec)->finalize (pspec);
202 G_UNLOCK (pspec_ref_count);
203 g_return_if_fail (pspec->ref_count > 0);
208 g_param_spec_sink (GParamSpec *pspec)
210 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
212 G_LOCK (pspec_ref_count);
213 if (pspec->ref_count > 0)
215 if (g_datalist_id_remove_no_notify (&pspec->qdata, quark_floating))
217 /* sync with _unref */
218 if (pspec->ref_count > 1)
219 pspec->ref_count -= 1;
222 G_UNLOCK (pspec_ref_count);
223 g_param_spec_unref (pspec);
228 G_UNLOCK (pspec_ref_count);
232 G_UNLOCK (pspec_ref_count);
233 g_return_if_fail (pspec->ref_count > 0);
238 g_param_spec_internal (GType param_type,
246 g_return_val_if_fail (G_TYPE_IS_PARAM (param_type) && param_type != G_TYPE_PARAM, NULL);
247 g_return_val_if_fail (name != NULL, NULL);
248 g_return_val_if_fail ((name[0] >= 'A' && name[0] <= 'Z') || (name[0] >= 'a' && name[0] <= 'z'), NULL);
250 pspec = (gpointer) g_type_create_instance (param_type);
251 pspec->name = g_strdup (name);
252 g_strcanon (pspec->name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-');
253 pspec->nick = g_strdup (nick ? nick : pspec->name);
254 pspec->blurb = g_strdup (blurb);
255 pspec->flags = (flags & G_PARAM_USER_MASK) | (flags & G_PARAM_MASK);
261 g_param_spec_get_qdata (GParamSpec *pspec,
264 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), NULL);
266 return quark ? g_datalist_id_get_data (&pspec->qdata, quark) : NULL;
270 g_param_spec_set_qdata (GParamSpec *pspec,
274 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
275 g_return_if_fail (quark > 0);
277 g_datalist_id_set_data (&pspec->qdata, quark, data);
281 g_param_spec_set_qdata_full (GParamSpec *pspec,
284 GDestroyNotify destroy)
286 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
287 g_return_if_fail (quark > 0);
289 g_datalist_id_set_data_full (&pspec->qdata, quark, data, data ? destroy : (GDestroyNotify) NULL);
293 g_param_spec_steal_qdata (GParamSpec *pspec,
296 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), NULL);
297 g_return_val_if_fail (quark > 0, NULL);
299 return g_datalist_id_remove_no_notify (&pspec->qdata, quark);
303 g_param_value_set_default (GParamSpec *pspec,
306 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
307 g_return_if_fail (G_IS_VALUE (value));
308 g_return_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, value));
310 g_value_reset (value);
311 G_PARAM_SPEC_GET_CLASS (pspec)->value_set_default (pspec, value);
315 g_param_value_defaults (GParamSpec *pspec,
318 GValue dflt_value = { 0, };
321 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), FALSE);
322 g_return_val_if_fail (G_IS_VALUE (value), FALSE);
323 g_return_val_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, value), FALSE);
325 g_value_init (&dflt_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
326 G_PARAM_SPEC_GET_CLASS (pspec)->value_set_default (pspec, &dflt_value);
327 defaults = G_PARAM_SPEC_GET_CLASS (pspec)->values_cmp (pspec, value, &dflt_value) == 0;
328 g_value_unset (&dflt_value);
334 g_param_value_validate (GParamSpec *pspec,
337 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), FALSE);
338 g_return_val_if_fail (G_IS_VALUE (value), FALSE);
339 g_return_val_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, value), FALSE);
341 if (G_PARAM_SPEC_GET_CLASS (pspec)->value_validate)
343 GValue oval = *value;
345 if (G_PARAM_SPEC_GET_CLASS (pspec)->value_validate (pspec, value) ||
346 memcmp (&oval.data, &value->data, sizeof (oval.data)))
354 g_param_value_convert (GParamSpec *pspec,
355 const GValue *src_value,
357 gboolean strict_validation)
359 GValue tmp_value = { 0, };
361 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), FALSE);
362 g_return_val_if_fail (G_IS_VALUE (src_value), FALSE);
363 g_return_val_if_fail (G_IS_VALUE (dest_value), FALSE);
364 g_return_val_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, dest_value), FALSE);
366 /* better leave dest_value untouched when returning FALSE */
368 g_value_init (&tmp_value, G_VALUE_TYPE (dest_value));
369 if (g_value_transform (src_value, &tmp_value) &&
370 (!g_param_value_validate (pspec, &tmp_value) || !strict_validation))
372 g_value_unset (dest_value);
374 /* values are relocatable */
375 memcpy (dest_value, &tmp_value, sizeof (tmp_value));
381 g_value_unset (&tmp_value);
388 g_param_values_cmp (GParamSpec *pspec,
389 const GValue *value1,
390 const GValue *value2)
394 /* param_values_cmp() effectively does: value1 - value2
395 * so the return values are:
396 * -1) value1 < value2
397 * 0) value1 == value2
400 g_return_val_if_fail (G_IS_PARAM_SPEC (pspec), 0);
401 g_return_val_if_fail (G_IS_VALUE (value1), 0);
402 g_return_val_if_fail (G_IS_VALUE (value2), 0);
403 g_return_val_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, value1), 0);
404 g_return_val_if_fail (PSPEC_APPLIES_TO_VALUE (pspec, value2), 0);
406 cmp = G_PARAM_SPEC_GET_CLASS (pspec)->values_cmp (pspec, value1, value2);
408 return CLAMP (cmp, -1, 1);
412 value_param_init (GValue *value)
414 value->data[0].v_pointer = NULL;
418 value_param_free_value (GValue *value)
420 if (value->data[0].v_pointer)
421 g_param_spec_unref (value->data[0].v_pointer);
425 value_param_copy_value (const GValue *src_value,
428 if (src_value->data[0].v_pointer)
429 dest_value->data[0].v_pointer = g_param_spec_ref (src_value->data[0].v_pointer);
431 dest_value->data[0].v_pointer = NULL;
435 value_param_transform_value (const GValue *src_value,
438 if (src_value->data[0].v_pointer &&
439 g_type_is_a (G_PARAM_SPEC_TYPE (dest_value->data[0].v_pointer), G_VALUE_TYPE (dest_value)))
440 dest_value->data[0].v_pointer = g_param_spec_ref (src_value->data[0].v_pointer);
442 dest_value->data[0].v_pointer = NULL;
446 value_param_peek_pointer (const GValue *value)
448 return value->data[0].v_pointer;
452 value_param_collect_value (GValue *value,
453 guint n_collect_values,
454 GTypeCValue *collect_values,
457 if (collect_values[0].v_pointer)
459 GParamSpec *param = collect_values[0].v_pointer;
461 if (param->g_type_instance.g_class == NULL)
462 return g_strconcat ("invalid unclassed param spec pointer for value type `",
463 G_VALUE_TYPE_NAME (value),
466 else if (!g_value_type_compatible (G_PARAM_SPEC_TYPE (param), G_VALUE_TYPE (value)))
467 return g_strconcat ("invalid param spec type `",
468 G_PARAM_SPEC_TYPE_NAME (param),
469 "' for value type `",
470 G_VALUE_TYPE_NAME (value),
473 value->data[0].v_pointer = g_param_spec_ref (param);
476 value->data[0].v_pointer = NULL;
482 value_param_lcopy_value (const GValue *value,
483 guint n_collect_values,
484 GTypeCValue *collect_values,
487 GParamSpec **param_p = collect_values[0].v_pointer;
490 return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value));
492 if (!value->data[0].v_pointer)
494 else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
495 *param_p = value->data[0].v_pointer;
497 *param_p = g_param_spec_ref (value->data[0].v_pointer);
503 /* --- param spec pool --- */
504 struct _GParamSpecPool
507 gboolean type_prefixing;
508 GHashTable *hash_table;
512 param_spec_pool_hash (gconstpointer key_spec)
514 const GParamSpec *key = key_spec;
516 guint h = key->owner_type;
518 for (p = key->name; *p; p++)
519 h = (h << 5) - h + *p;
525 param_spec_pool_equals (gconstpointer key_spec_1,
526 gconstpointer key_spec_2)
528 const GParamSpec *key1 = key_spec_1;
529 const GParamSpec *key2 = key_spec_2;
531 return (key1->owner_type == key2->owner_type &&
532 strcmp (key1->name, key2->name) == 0);
536 g_param_spec_pool_new (gboolean type_prefixing)
538 static GStaticMutex init_smutex = G_STATIC_MUTEX_INIT;
539 GParamSpecPool *pool = g_new (GParamSpecPool, 1);
541 memcpy (&pool->smutex, &init_smutex, sizeof (init_smutex));
542 pool->type_prefixing = type_prefixing != FALSE;
543 pool->hash_table = g_hash_table_new (param_spec_pool_hash, param_spec_pool_equals);
549 g_param_spec_pool_insert (GParamSpecPool *pool,
555 if (pool && pspec && owner_type > 0 && pspec->owner_type == 0)
557 G_SLOCK (&pool->smutex);
558 for (p = pspec->name; *p; p++)
560 if (!strchr (G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-_", *p))
562 g_warning (G_STRLOC ": pspec name \"%s\" contains invalid characters", pspec->name);
563 G_SUNLOCK (&pool->smutex);
568 pspec->owner_type = owner_type;
569 g_param_spec_ref (pspec);
570 g_hash_table_insert (pool->hash_table, pspec, pspec);
571 G_SUNLOCK (&pool->smutex);
575 g_return_if_fail (pool != NULL);
576 g_return_if_fail (pspec);
577 g_return_if_fail (owner_type > 0);
578 g_return_if_fail (pspec->owner_type == 0);
583 g_param_spec_pool_remove (GParamSpecPool *pool,
588 G_SLOCK (&pool->smutex);
589 if (g_hash_table_remove (pool->hash_table, pspec))
590 g_param_spec_unref (pspec);
592 g_warning (G_STRLOC ": attempt to remove unknown pspec `%s' from pool", pspec->name);
593 G_SUNLOCK (&pool->smutex);
597 g_return_if_fail (pool != NULL);
598 g_return_if_fail (pspec);
602 static inline GParamSpec*
603 param_spec_ht_lookup (GHashTable *hash_table,
604 const gchar *param_name,
606 gboolean walk_ancestors)
608 GParamSpec key, *pspec;
610 key.owner_type = owner_type;
611 key.name = (gchar*) param_name;
615 pspec = g_hash_table_lookup (hash_table, &key);
618 key.owner_type = g_type_parent (key.owner_type);
620 while (key.owner_type);
622 pspec = g_hash_table_lookup (hash_table, &key);
626 /* try canonicalized form */
627 key.name = g_strdup (param_name);
628 key.owner_type = owner_type;
630 g_strcanon (key.name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-');
634 pspec = g_hash_table_lookup (hash_table, &key);
640 key.owner_type = g_type_parent (key.owner_type);
642 while (key.owner_type);
644 pspec = g_hash_table_lookup (hash_table, &key);
652 g_param_spec_pool_lookup (GParamSpecPool *pool,
653 const gchar *param_name,
655 gboolean walk_ancestors)
660 if (!pool || !param_name)
662 g_return_val_if_fail (pool != NULL, NULL);
663 g_return_val_if_fail (param_name != NULL, NULL);
666 G_SLOCK (&pool->smutex);
668 delim = pool->type_prefixing ? strchr (param_name, ':') : NULL;
670 /* try quick and away, i.e. without prefix */
673 pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
674 G_SUNLOCK (&pool->smutex);
679 /* strip type prefix */
680 if (pool->type_prefixing && delim[1] == ':')
682 guint l = delim - param_name;
683 gchar stack_buffer[32], *buffer = l < 32 ? stack_buffer : g_new (gchar, l + 1);
686 strncpy (buffer, param_name, delim - param_name);
688 type = g_type_from_name (buffer);
691 if (type) /* type==0 isn't a valid type pefix */
693 /* sanity check, these cases don't make a whole lot of sense */
694 if ((!walk_ancestors && type != owner_type) || !g_type_is_a (owner_type, type))
696 G_SUNLOCK (&pool->smutex);
702 pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
703 G_SUNLOCK (&pool->smutex);
708 /* malformed param_name */
710 G_SUNLOCK (&pool->smutex);
716 pool_list (gpointer key,
720 GParamSpec *pspec = value;
721 gpointer *data = user_data;
722 GType owner_type = GPOINTER_TO_UINT (data[1]);
724 if (owner_type == pspec->owner_type)
725 data[0] = g_list_prepend (data[0], pspec);
729 g_param_spec_pool_belongings (GParamSpecPool *pool,
734 g_return_val_if_fail (pool != NULL, NULL);
735 g_return_val_if_fail (owner_type > 0, NULL);
737 G_SLOCK (&pool->smutex);
739 data[1] = GUINT_TO_POINTER (owner_type);
740 g_hash_table_foreach (pool->hash_table, pool_list, &data);
741 G_SUNLOCK (&pool->smutex);
747 pspec_compare_id (gconstpointer a,
750 const GParamSpec *pspec1 = a, *pspec2 = b;
752 return pspec1->param_id < pspec2->param_id ? -1 : pspec1->param_id > pspec2->param_id;
755 static inline GSList*
756 pspec_list_remove_overridden (GSList *plist,
761 GSList *rlist = NULL;
765 GSList *tmp = plist->next;
766 GParamSpec *pspec = plist->data;
768 if (param_spec_ht_lookup (ht, pspec->name, owner_type, TRUE) != pspec)
769 g_slist_free_1 (plist);
782 pool_depth_list (gpointer key,
786 GParamSpec *pspec = value;
787 gpointer *data = user_data;
788 GSList **slists = data[0];
789 GType owner_type = GPOINTER_TO_UINT (data[1]);
791 if (g_type_is_a (owner_type, pspec->owner_type))
793 guint d = g_type_depth (pspec->owner_type);
795 slists[d - 1] = g_slist_prepend (slists[d - 1], pspec);
799 GParamSpec** /* free result */
800 g_param_spec_pool_list (GParamSpecPool *pool,
804 GParamSpec **pspecs, **p;
805 GSList **slists, *node;
809 g_return_val_if_fail (pool != NULL, NULL);
810 g_return_val_if_fail (owner_type > 0, NULL);
811 g_return_val_if_fail (n_pspecs_p != NULL, NULL);
813 G_SLOCK (&pool->smutex);
815 d = g_type_depth (owner_type);
816 slists = g_new0 (GSList*, d);
818 data[1] = GUINT_TO_POINTER (owner_type);
819 g_hash_table_foreach (pool->hash_table, pool_depth_list, &data);
820 for (i = 0; i < d - 1; i++)
821 slists[i] = pspec_list_remove_overridden (slists[i], pool->hash_table, owner_type, n_pspecs_p);
822 *n_pspecs_p += g_slist_length (slists[i]);
823 pspecs = g_new (GParamSpec*, *n_pspecs_p + 1);
825 for (i = 0; i < d; i++)
827 slists[i] = g_slist_sort (slists[i], pspec_compare_id);
828 for (node = slists[i]; node; node = node->next)
830 g_slist_free (slists[i]);
834 G_SUNLOCK (&pool->smutex);
840 /* --- auxillary functions --- */
845 void (*finalize) (GParamSpec *pspec);
846 void (*value_set_default) (GParamSpec *pspec,
848 gboolean (*value_validate) (GParamSpec *pspec,
850 gint (*values_cmp) (GParamSpec *pspec,
851 const GValue *value1,
852 const GValue *value2);
853 } ParamSpecClassInfo;
856 param_spec_generic_class_init (gpointer g_class,
859 GParamSpecClass *class = g_class;
860 ParamSpecClassInfo *info = class_data;
862 class->value_type = info->value_type;
864 class->finalize = info->finalize; /* optional */
865 class->value_set_default = info->value_set_default;
866 if (info->value_validate)
867 class->value_validate = info->value_validate; /* optional */
868 class->values_cmp = info->values_cmp;
873 default_value_set_default (GParamSpec *pspec,
876 /* value is already zero initialized */
880 default_values_cmp (GParamSpec *pspec,
881 const GValue *value1,
882 const GValue *value2)
884 return memcmp (&value1->data, &value2->data, sizeof (value1->data));
888 g_param_type_register_static (const gchar *name,
889 const GParamSpecTypeInfo *pspec_info)
892 sizeof (GParamSpecClass), /* class_size */
893 NULL, /* base_init */
894 NULL, /* base_destroy */
895 param_spec_generic_class_init, /* class_init */
896 NULL, /* class_destroy */
897 NULL, /* class_data */
898 0, /* instance_size */
899 16, /* n_preallocs */
900 NULL, /* instance_init */
902 ParamSpecClassInfo *cinfo;
904 g_return_val_if_fail (name != NULL, 0);
905 g_return_val_if_fail (pspec_info != NULL, 0);
906 g_return_val_if_fail (g_type_from_name (name) == 0, 0);
907 g_return_val_if_fail (pspec_info->instance_size >= sizeof (GParamSpec), 0);
908 g_return_val_if_fail (g_type_name (pspec_info->value_type) != NULL, 0);
909 /* default: g_return_val_if_fail (pspec_info->value_set_default != NULL, 0); */
910 /* optional: g_return_val_if_fail (pspec_info->value_validate != NULL, 0); */
911 /* default: g_return_val_if_fail (pspec_info->values_cmp != NULL, 0); */
913 info.instance_size = pspec_info->instance_size;
914 info.n_preallocs = pspec_info->n_preallocs;
915 info.instance_init = (GInstanceInitFunc) pspec_info->instance_init;
916 cinfo = g_new (ParamSpecClassInfo, 1);
917 cinfo->value_type = pspec_info->value_type;
918 cinfo->finalize = pspec_info->finalize;
919 cinfo->value_set_default = pspec_info->value_set_default ? pspec_info->value_set_default : default_value_set_default;
920 cinfo->value_validate = pspec_info->value_validate;
921 cinfo->values_cmp = pspec_info->values_cmp ? pspec_info->values_cmp : default_values_cmp;
922 info.class_data = cinfo;
924 return g_type_register_static (G_TYPE_PARAM, name, &info, 0);
928 g_value_set_param (GValue *value,
931 g_return_if_fail (G_VALUE_HOLDS_PARAM (value));
933 g_return_if_fail (G_IS_PARAM_SPEC (param));
935 if (value->data[0].v_pointer)
936 g_param_spec_unref (value->data[0].v_pointer);
937 value->data[0].v_pointer = param;
938 if (value->data[0].v_pointer)
939 g_param_spec_ref (value->data[0].v_pointer);
943 g_value_get_param (const GValue *value)
945 g_return_val_if_fail (G_VALUE_HOLDS_PARAM (value), NULL);
947 return value->data[0].v_pointer;
951 g_value_dup_param (const GValue *value)
953 g_return_val_if_fail (G_VALUE_HOLDS_PARAM (value), NULL);
955 return value->data[0].v_pointer ? g_param_spec_ref (value->data[0].v_pointer) : NULL;