1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1998-1999, 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.
26 #include "gtypeplugin.h"
27 #include "gvaluecollector.h"
31 /* NOTE: some functions (some internal variants and exported ones)
32 * invalidate data portions of the TypeNodes. if external functions/callbacks
33 * are called, pointers to memory maintained by TypeNodes have to be looked up
34 * again. this affects most of the struct TypeNode fields, e.g. ->children or
35 * CLASSED_NODE_IFACES_ENTRIES() respectively IFACE_NODE_PREREQUISITES() (but
36 * not ->supers[]), as all those memory portions can get realloc()ed during
37 * callback invocation.
40 * - g_type_from_name() should do an ordered array lookup after fetching the
41 * the quark, instead of a second hashtable lookup.
44 * lock handling issues when calling static functions are indicated by
45 * uppercase letter postfixes, all static functions have to have
46 * one of the below postfixes:
47 * - _I: [Indifferent about locking]
48 * function doesn't care about locks at all
49 * - _U: [Unlocked invocation]
50 * no read or write lock has to be held across function invocation
51 * (locks may be acquired and released during invocation though)
52 * - _L: [Locked invocation]
53 * a write lock or more than 0 read locks have to be held across
55 * - _W: [Write-locked invocation]
56 * a write lock has to be held across function invokation
57 * - _Wm: [Write-locked invocation, mutatable]
58 * like _W, but the write lock might be released and reacquired
59 * during invocation, watch your pointers
62 static GStaticRWLock type_rw_lock = G_STATIC_RW_LOCK_INIT;
64 #define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_static_rw_lock_reader_lock (rw_lock); } while (0)
65 #define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_static_rw_lock_reader_unlock (rw_lock); } while (0)
66 #define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_static_rw_lock_writer_lock (rw_lock); } while (0)
67 #define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_static_rw_lock_writer_unlock (rw_lock); } while (0)
69 #define G_READ_LOCK(rw_lock) g_static_rw_lock_reader_lock (rw_lock)
70 #define G_READ_UNLOCK(rw_lock) g_static_rw_lock_reader_unlock (rw_lock)
71 #define G_WRITE_LOCK(rw_lock) g_static_rw_lock_writer_lock (rw_lock)
72 #define G_WRITE_UNLOCK(rw_lock) g_static_rw_lock_writer_unlock (rw_lock)
74 #define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
75 static const gchar *_action = " invalidly modified type "; \
76 gpointer _arg = (gpointer) (arg); const gchar *_tname = (type_name), *_fname = (func); \
78 g_error ("%s(%p)%s`%s'", _fname, _arg, _action, _tname); \
80 g_error ("%s()%s`%s'", _fname, _action, _tname); \
82 #define g_return_val_if_uninitialized(condition, init_function, return_value) G_STMT_START{ \
85 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
86 "%s: initialization assertion failed, use %s() prior to this function", \
87 G_STRLOC, G_STRINGIFY (init_function)); \
88 return (return_value); \
93 #define DEBUG_CODE(debug_type, code_block) G_STMT_START { \
94 if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) \
97 #else /* !G_ENABLE_DEBUG */
98 #define DEBUG_CODE(debug_type, code_block) /* code_block */
99 #endif /* G_ENABLE_DEBUG */
101 #define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
102 G_TYPE_FLAG_INSTANTIATABLE | \
103 G_TYPE_FLAG_DERIVABLE | \
104 G_TYPE_FLAG_DEEP_DERIVABLE)
105 #define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT)
106 #define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
107 sizeof (gpointer)), \
111 /* --- typedefs --- */
112 typedef struct _TypeNode TypeNode;
113 typedef struct _CommonData CommonData;
114 typedef struct _IFaceData IFaceData;
115 typedef struct _ClassData ClassData;
116 typedef struct _InstanceData InstanceData;
117 typedef union _TypeData TypeData;
118 typedef struct _IFaceEntry IFaceEntry;
119 typedef struct _IFaceHolder IFaceHolder;
122 /* --- prototypes --- */
123 static inline GTypeFundamentalInfo* type_node_fundamental_info_I (TypeNode *node);
124 static void type_add_flags_W (TypeNode *node,
126 static void type_data_make_W (TypeNode *node,
127 const GTypeInfo *info,
128 const GTypeValueTable *value_table);
129 static inline void type_data_ref_Wm (TypeNode *node);
130 static inline void type_data_unref_Wm (TypeNode *node,
132 static void type_data_last_unref_Wm (GType type,
134 static inline gpointer type_get_qdata_L (TypeNode *node,
136 static inline void type_set_qdata_W (TypeNode *node,
139 static IFaceHolder* type_iface_peek_holder_L (TypeNode *iface,
140 GType instance_type);
141 static gboolean type_node_is_a_L (TypeNode *node,
142 TypeNode *iface_node);
145 /* --- structures --- */
149 guint n_children : 12;
151 guint _prot_n_ifaces_prerequisites : 9;
152 guint is_classed : 1;
153 guint is_instantiatable : 1;
154 guint mutatable_check_cache : 1; /* combines some common path checks */
156 TypeData * volatile data;
160 IFaceEntry *iface_entries; /* for !iface types */
161 GType *prerequisistes;
163 GType supers[1]; /* flexible array */
165 #define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
166 #define MAX_N_SUPERS (255)
167 #define MAX_N_CHILDREN (4095)
168 #define MAX_N_IFACES (511)
169 #define MAX_N_PREREQUISITES (MAX_N_IFACES)
170 #define NODE_TYPE(node) (node->supers[0])
171 #define NODE_PARENT_TYPE(node) (node->supers[1])
172 #define NODE_FUNDAMENTAL_TYPE(node) (node->supers[node->n_supers])
173 #define NODE_NAME(node) (g_quark_to_string (node->qname))
174 #define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
175 #define CLASSED_NODE_N_IFACES(node) ((node)->_prot_n_ifaces_prerequisites)
176 #define CLASSED_NODE_IFACES_ENTRIES(node) ((node)->_prot.iface_entries)
177 #define IFACE_NODE_N_PREREQUISITES(node) ((node)->_prot_n_ifaces_prerequisites)
178 #define IFACE_NODE_PREREQUISITES(node) ((node)->_prot.prerequisistes)
179 #define iface_node_get_holders_L(node) ((IFaceHolder*) type_get_qdata_L ((node), static_quark_iface_holder))
180 #define iface_node_set_holders_W(node, holders) (type_set_qdata_W ((node), static_quark_iface_holder, (holders)))
181 #define iface_node_get_dependants_array_L(n) ((GType*) type_get_qdata_L ((n), static_quark_dependants_array))
182 #define iface_node_set_dependants_array_W(n,d) (type_set_qdata_W ((n), static_quark_dependants_array, (d)))
183 #define TYPE_ID_MASK ((GType) ((1 << G_TYPE_FUNDAMENTAL_SHIFT) - 1))
189 GInterfaceInfo *info;
196 GTypeInterface *vtable;
201 GTypeValueTable *value_table;
207 GBaseInitFunc vtable_init_base;
208 GBaseFinalizeFunc vtable_finalize_base;
214 GBaseInitFunc class_init_base;
215 GBaseFinalizeFunc class_finalize_base;
216 GClassInitFunc class_init;
217 GClassFinalizeFunc class_finalize;
218 gconstpointer class_data;
225 GBaseInitFunc class_init_base;
226 GBaseFinalizeFunc class_finalize_base;
227 GClassInitFunc class_init;
228 GClassFinalizeFunc class_finalize;
229 gconstpointer class_data;
231 guint16 instance_size;
233 GInstanceInitFunc instance_init;
234 GMemChunk *mem_chunk;
241 InstanceData instance;
245 GTypeClassCacheFunc cache_func;
249 /* --- variables --- */
250 static guint static_n_class_cache_funcs = 0;
251 static ClassCacheFunc *static_class_cache_funcs = NULL;
252 static GQuark static_quark_type_flags = 0;
253 static GQuark static_quark_iface_holder = 0;
254 static GQuark static_quark_dependants_array = 0;
255 GTypeDebugFlags _g_type_debug_flags = 0;
258 /* --- type nodes --- */
259 static GHashTable *static_type_nodes_ht = NULL;
260 static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { 0, };
261 static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
263 static inline TypeNode*
264 lookup_type_node_I (register GType utype)
266 if (utype > G_TYPE_FUNDAMENTAL_MAX)
267 return (TypeNode*) (utype & ~TYPE_ID_MASK);
269 return static_fundamental_type_nodes[utype >> G_TYPE_FUNDAMENTAL_SHIFT];
273 type_node_any_new_W (TypeNode *pnode,
277 GTypeFundamentalFlags type_flags)
282 guint i, node_size = 0;
284 n_supers = pnode ? pnode->n_supers + 1 : 0;
287 node_size += SIZEOF_FUNDAMENTAL_INFO; /* fundamental type info */
288 node_size += SIZEOF_BASE_TYPE_NODE (); /* TypeNode structure */
289 node_size += (sizeof (GType) * (1 + n_supers + 1)); /* self + ancestors + (0) for ->supers[] */
290 node = g_malloc0 (node_size);
291 if (!pnode) /* offset fundamental types */
293 node = G_STRUCT_MEMBER_P (node, SIZEOF_FUNDAMENTAL_INFO);
294 static_fundamental_type_nodes[ftype >> G_TYPE_FUNDAMENTAL_SHIFT] = node;
300 g_assert ((type & TYPE_ID_MASK) == 0);
302 node->n_supers = n_supers;
305 node->supers[0] = type;
308 node->is_classed = (type_flags & G_TYPE_FLAG_CLASSED) != 0;
309 node->is_instantiatable = (type_flags & G_TYPE_FLAG_INSTANTIATABLE) != 0;
311 if (NODE_IS_IFACE (node))
313 IFACE_NODE_N_PREREQUISITES (node) = 0;
314 IFACE_NODE_PREREQUISITES (node) = NULL;
318 CLASSED_NODE_N_IFACES (node) = 0;
319 CLASSED_NODE_IFACES_ENTRIES (node) = NULL;
324 node->supers[0] = type;
325 memcpy (node->supers + 1, pnode->supers, sizeof (GType) * (1 + pnode->n_supers + 1));
327 node->is_classed = pnode->is_classed;
328 node->is_instantiatable = pnode->is_instantiatable;
330 if (NODE_IS_IFACE (node))
332 IFACE_NODE_N_PREREQUISITES (node) = 0;
333 IFACE_NODE_PREREQUISITES (node) = NULL;
339 CLASSED_NODE_N_IFACES (node) = CLASSED_NODE_N_IFACES (pnode);
340 CLASSED_NODE_IFACES_ENTRIES (node) = g_memdup (CLASSED_NODE_IFACES_ENTRIES (pnode),
341 sizeof (CLASSED_NODE_IFACES_ENTRIES (pnode)[0]) *
342 CLASSED_NODE_N_IFACES (node));
343 for (j = 0; j < CLASSED_NODE_N_IFACES (node); j++)
344 CLASSED_NODE_IFACES_ENTRIES (node)[j].vtable = NULL;
347 i = pnode->n_children++;
348 pnode->children = g_renew (GType, pnode->children, pnode->n_children);
349 pnode->children[i] = type;
352 node->plugin = plugin;
353 node->n_children = 0;
354 node->children = NULL;
356 node->qname = g_quark_from_string (name);
357 node->global_gdata = NULL;
359 g_hash_table_insert (static_type_nodes_ht,
360 GUINT_TO_POINTER (node->qname),
365 static inline GTypeFundamentalInfo*
366 type_node_fundamental_info_I (TypeNode *node)
368 GType ftype = NODE_FUNDAMENTAL_TYPE (node);
370 if (ftype != NODE_TYPE (node))
371 node = lookup_type_node_I (ftype);
373 return node ? G_STRUCT_MEMBER_P (node, -SIZEOF_FUNDAMENTAL_INFO) : NULL;
377 type_node_fundamental_new_W (GType ftype,
379 GTypeFundamentalFlags type_flags)
381 GTypeFundamentalInfo *finfo;
384 g_assert ((ftype & TYPE_ID_MASK) == 0);
385 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX);
387 if (ftype >> G_TYPE_FUNDAMENTAL_SHIFT == static_fundamental_next)
388 static_fundamental_next++;
390 type_flags &= TYPE_FUNDAMENTAL_FLAG_MASK;
392 node = type_node_any_new_W (NULL, ftype, name, NULL, type_flags);
394 finfo = type_node_fundamental_info_I (node);
395 finfo->type_flags = type_flags;
401 type_node_new_W (TypeNode *pnode,
407 g_assert (pnode->n_supers < MAX_N_SUPERS);
408 g_assert (pnode->n_children < MAX_N_CHILDREN);
410 return type_node_any_new_W (pnode, NODE_FUNDAMENTAL_TYPE (pnode), name, plugin, 0);
413 static inline IFaceEntry*
414 type_lookup_iface_entry_L (TypeNode *node,
415 TypeNode *iface_node)
417 if (NODE_IS_IFACE (iface_node) && CLASSED_NODE_N_IFACES (node))
419 IFaceEntry *ifaces = CLASSED_NODE_IFACES_ENTRIES (node) - 1;
420 guint n_ifaces = CLASSED_NODE_N_IFACES (node);
421 GType iface_type = NODE_TYPE (iface_node);
428 i = (n_ifaces + 1) >> 1;
430 if (iface_type == check->iface_type)
432 else if (iface_type > check->iface_type)
437 else /* if (iface_type < check->iface_type) */
446 static inline gboolean
447 type_lookup_prerequisite_L (TypeNode *iface,
448 GType prerequisite_type)
450 if (NODE_IS_IFACE (iface) && IFACE_NODE_N_PREREQUISITES (iface))
452 GType *prerequisites = IFACE_NODE_PREREQUISITES (iface) - 1;
453 guint n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
460 i = (n_prerequisites + 1) >> 1;
461 check = prerequisites + i;
462 if (prerequisite_type == *check)
464 else if (prerequisite_type > *check)
466 n_prerequisites -= i;
467 prerequisites = check;
469 else /* if (prerequisite_type < *check) */
470 n_prerequisites = i - 1;
472 while (n_prerequisites);
478 type_descriptive_name_I (GType type)
482 TypeNode *node = lookup_type_node_I (type);
484 return node ? NODE_NAME (node) : "<unknown>";
491 /* --- type consistency checks --- */
493 check_plugin_U (GTypePlugin *plugin,
494 gboolean need_complete_type_info,
495 gboolean need_complete_interface_info,
496 const gchar *type_name)
498 /* G_IS_TYPE_PLUGIN() and G_TYPE_PLUGIN_GET_CLASS() are external calls: _U
502 g_warning ("plugin handle for type `%s' is NULL",
506 if (!G_IS_TYPE_PLUGIN (plugin))
508 g_warning ("plugin pointer (%p) for type `%s' is invalid",
512 if (need_complete_type_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_type_info)
514 g_warning ("plugin for type `%s' has no complete_type_info() implementation",
518 if (need_complete_interface_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_interface_info)
520 g_warning ("plugin for type `%s' has no complete_interface_info() implementation",
528 check_type_name_I (const gchar *type_name)
530 static const gchar *extra_chars = "-_+";
531 const gchar *p = type_name;
534 if (!type_name[0] || !type_name[1] || !type_name[2])
536 g_warning ("type name `%s' is too short", type_name);
539 /* check the first letter */
540 name_valid = (p[0] >= 'A' && p[0] <= 'Z') || (p[0] >= 'a' && p[0] <= 'z') || p[0] == '_';
541 for (p = type_name + 1; *p; p++)
542 name_valid &= ((p[0] >= 'A' && p[0] <= 'Z') ||
543 (p[0] >= 'a' && p[0] <= 'z') ||
544 (p[0] >= '0' && p[0] <= '9') ||
545 strchr (extra_chars, p[0]));
548 g_warning ("type name `%s' contains invalid characters", type_name);
551 if (g_type_from_name (type_name))
553 g_warning ("cannot register existing type `%s'", type_name);
561 check_derivation_I (GType parent_type,
562 const gchar *type_name)
565 GTypeFundamentalInfo* finfo;
567 pnode = lookup_type_node_I (parent_type);
570 g_warning ("cannot derive type `%s' from invalid parent type `%s'",
572 type_descriptive_name_I (parent_type));
575 finfo = type_node_fundamental_info_I (pnode);
576 /* ensure flat derivability */
577 if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
579 g_warning ("cannot derive `%s' from non-derivable parent type `%s'",
584 /* ensure deep derivability */
585 if (parent_type != NODE_FUNDAMENTAL_TYPE (pnode) &&
586 !(finfo->type_flags & G_TYPE_FLAG_DEEP_DERIVABLE))
588 g_warning ("cannot derive `%s' from non-fundamental parent type `%s'",
598 check_collect_format_I (const gchar *collect_format)
600 const gchar *p = collect_format;
601 gchar valid_format[] = { G_VALUE_COLLECT_INT, G_VALUE_COLLECT_LONG,
602 G_VALUE_COLLECT_INT64, G_VALUE_COLLECT_DOUBLE,
603 G_VALUE_COLLECT_POINTER, 0 };
606 if (!strchr (valid_format, *p++))
608 return p - collect_format <= G_VALUE_COLLECT_FORMAT_MAX_LENGTH;
612 check_value_table_I (const gchar *type_name,
613 const GTypeValueTable *value_table)
617 else if (value_table->value_init == NULL)
619 if (value_table->value_free || value_table->value_copy ||
620 value_table->value_peek_pointer ||
621 value_table->collect_format || value_table->collect_value ||
622 value_table->lcopy_format || value_table->lcopy_value)
623 g_warning ("cannot handle uninitializable values of type `%s'",
627 else /* value_table->value_init != NULL */
629 if (!value_table->value_free)
632 * g_warning ("missing `value_free()' for type `%s'", type_name);
636 if (!value_table->value_copy)
638 g_warning ("missing `value_copy()' for type `%s'", type_name);
641 if ((value_table->collect_format || value_table->collect_value) &&
642 (!value_table->collect_format || !value_table->collect_value))
644 g_warning ("one of `collect_format' and `collect_value()' is unspecified for type `%s'",
648 if (value_table->collect_format && !check_collect_format_I (value_table->collect_format))
650 g_warning ("the `%s' specification for type `%s' is too long or invalid",
655 if ((value_table->lcopy_format || value_table->lcopy_value) &&
656 (!value_table->lcopy_format || !value_table->lcopy_value))
658 g_warning ("one of `lcopy_format' and `lcopy_value()' is unspecified for type `%s'",
662 if (value_table->lcopy_format && !check_collect_format_I (value_table->lcopy_format))
664 g_warning ("the `%s' specification for type `%s' is too long or invalid",
674 check_type_info_I (TypeNode *pnode,
676 const gchar *type_name,
677 const GTypeInfo *info)
679 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (lookup_type_node_I (ftype));
680 gboolean is_interface = ftype == G_TYPE_INTERFACE;
682 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX && !(ftype & TYPE_ID_MASK));
684 /* check instance members */
685 if (!(finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
686 (info->instance_size || info->n_preallocs || info->instance_init))
689 g_warning ("cannot instantiate `%s', derived from non-instantiatable parent type `%s'",
693 g_warning ("cannot instantiate `%s' as non-instantiatable fundamental",
697 /* check class & interface members */
698 if (!(finfo->type_flags & G_TYPE_FLAG_CLASSED) &&
699 (info->class_init || info->class_finalize || info->class_data ||
700 (!is_interface && (info->class_size || info->base_init || info->base_finalize))))
703 g_warning ("cannot create class for `%s', derived from non-classed parent type `%s'",
707 g_warning ("cannot create class for `%s' as non-classed fundamental",
711 /* check interface size */
712 if (is_interface && info->class_size < sizeof (GTypeInterface))
714 g_warning ("specified interface size for type `%s' is smaller than `GTypeInterface' size",
718 /* check class size */
719 if (finfo->type_flags & G_TYPE_FLAG_CLASSED)
721 if (info->class_size < sizeof (GTypeClass))
723 g_warning ("specified class size for type `%s' is smaller than `GTypeClass' size",
727 if (pnode && info->class_size < pnode->data->class.class_size)
729 g_warning ("specified class size for type `%s' is smaller "
730 "than the parent type's `%s' class size",
736 /* check instance size */
737 if (finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE)
739 if (info->instance_size < sizeof (GTypeInstance))
741 g_warning ("specified instance size for type `%s' is smaller than `GTypeInstance' size",
745 if (pnode && info->instance_size < pnode->data->instance.instance_size)
747 g_warning ("specified instance size for type `%s' is smaller "
748 "than the parent type's `%s' instance size",
759 find_conforming_child_type_L (TypeNode *pnode,
762 TypeNode *node = NULL;
765 if (type_lookup_iface_entry_L (pnode, iface))
768 for (i = 0; i < pnode->n_children && !node; i++)
769 node = find_conforming_child_type_L (lookup_type_node_I (pnode->children[i]), iface);
775 check_add_interface_L (GType instance_type,
778 TypeNode *node = lookup_type_node_I (instance_type);
779 TypeNode *iface = lookup_type_node_I (iface_type);
782 GType *prerequisites;
786 if (!node || !node->is_instantiatable)
788 g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
789 type_descriptive_name_I (instance_type));
792 if (!iface || !NODE_IS_IFACE (iface))
794 g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
795 type_descriptive_name_I (iface_type),
799 tnode = lookup_type_node_I (NODE_PARENT_TYPE (iface));
800 if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry_L (node, tnode))
802 /* 2001/7/31:timj: erk, i guess this warning is junk as interface derivation is flat */
803 g_warning ("cannot add sub-interface `%s' to type `%s' which does not conform to super-interface `%s'",
809 /* allow overriding of interface type introduced for parent type */
810 entry = type_lookup_iface_entry_L (node, iface);
811 if (entry && entry->vtable == NULL && !type_iface_peek_holder_L (iface, NODE_TYPE (node)))
813 /* ok, we do conform to this interface already, but the interface vtable was not
814 * yet intialized, and we just conform to the interface because it got added to
815 * one of our parents. so we allow overriding of holder info here.
819 /* check whether one of our children already conforms (or whether the interface
820 * got added to this node already)
822 tnode = find_conforming_child_type_L (node, iface); /* tnode is_a node */
825 g_warning ("cannot add interface type `%s' to type `%s', since type `%s' already conforms to interface",
831 prerequisites = IFACE_NODE_PREREQUISITES (iface);
832 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
834 tnode = lookup_type_node_I (prerequisites[i]);
835 if (!type_node_is_a_L (node, tnode))
837 g_warning ("cannot add interface type `%s' to type `%s' which does not conform to prerequisite `%s'",
848 check_interface_info_I (TypeNode *iface,
850 const GInterfaceInfo *info)
852 if ((info->interface_finalize || info->interface_data) && !info->interface_init)
854 g_warning ("interface type `%s' for type `%s' comes without initializer",
856 type_descriptive_name_I (instance_type));
863 /* --- type info (type node data) --- */
865 type_data_make_W (TypeNode *node,
866 const GTypeInfo *info,
867 const GTypeValueTable *value_table)
870 GTypeValueTable *vtable = NULL;
871 guint vtable_size = 0;
873 g_assert (node->data == NULL && info != NULL);
877 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
880 vtable = pnode->data->common.value_table;
883 static const GTypeValueTable zero_vtable = { NULL, };
885 value_table = &zero_vtable;
890 /* need to setup vtable_size since we have to allocate it with data in one chunk */
891 vtable_size = sizeof (GTypeValueTable);
892 if (value_table->collect_format)
893 vtable_size += strlen (value_table->collect_format);
894 if (value_table->lcopy_format)
895 vtable_size += strlen (value_table->lcopy_format);
899 if (node->is_instantiatable) /* carefull, is_instantiatable is also is_classed */
901 data = g_malloc0 (sizeof (InstanceData) + vtable_size);
903 vtable = G_STRUCT_MEMBER_P (data, sizeof (InstanceData));
904 data->instance.class_size = info->class_size;
905 data->instance.class_init_base = info->base_init;
906 data->instance.class_finalize_base = info->base_finalize;
907 data->instance.class_init = info->class_init;
908 data->instance.class_finalize = info->class_finalize;
909 data->instance.class_data = info->class_data;
910 data->instance.class = NULL;
911 data->instance.instance_size = info->instance_size;
912 #ifdef DISABLE_MEM_POOLS
913 data->instance.n_preallocs = 0;
914 #else /* !DISABLE_MEM_POOLS */
915 data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
916 #endif /* !DISABLE_MEM_POOLS */
917 data->instance.instance_init = info->instance_init;
918 data->instance.mem_chunk = NULL;
920 else if (node->is_classed) /* only classed */
922 data = g_malloc0 (sizeof (ClassData) + vtable_size);
924 vtable = G_STRUCT_MEMBER_P (data, sizeof (ClassData));
925 data->class.class_size = info->class_size;
926 data->class.class_init_base = info->base_init;
927 data->class.class_finalize_base = info->base_finalize;
928 data->class.class_init = info->class_init;
929 data->class.class_finalize = info->class_finalize;
930 data->class.class_data = info->class_data;
931 data->class.class = NULL;
933 else if (NODE_IS_IFACE (node))
935 data = g_malloc0 (sizeof (IFaceData) + vtable_size);
937 vtable = G_STRUCT_MEMBER_P (data, sizeof (IFaceData));
938 data->iface.vtable_size = info->class_size;
939 data->iface.vtable_init_base = info->base_init;
940 data->iface.vtable_finalize_base = info->base_finalize;
944 data = g_malloc0 (sizeof (CommonData) + vtable_size);
946 vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
950 node->data->common.ref_count = 1;
956 /* we allocate the vtable and its strings together with the type data, so
957 * children can take over their parent's vtable pointer, and we don't
958 * need to worry freeing it or not when the child data is destroyed
960 *vtable = *value_table;
961 p = G_STRUCT_MEMBER_P (vtable, sizeof (*vtable));
963 vtable->collect_format = p;
964 if (value_table->collect_format)
966 strcat (p, value_table->collect_format);
967 p += strlen (value_table->collect_format);
971 vtable->lcopy_format = p;
972 if (value_table->lcopy_format)
973 strcat (p, value_table->lcopy_format);
975 node->data->common.value_table = vtable;
976 node->mutatable_check_cache = (node->data->common.value_table->value_init != NULL &&
977 !((G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_ABSTRACT) &
978 GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))));
980 g_assert (node->data->common.value_table != NULL); /* paranoid */
984 type_data_ref_Wm (TypeNode *node)
988 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
990 GTypeValueTable tmp_value_table;
992 g_assert (node->plugin != NULL);
996 type_data_ref_Wm (pnode);
998 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1001 memset (&tmp_info, 0, sizeof (tmp_info));
1002 memset (&tmp_value_table, 0, sizeof (tmp_value_table));
1004 G_WRITE_UNLOCK (&type_rw_lock);
1005 g_type_plugin_use (node->plugin);
1006 g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
1007 G_WRITE_LOCK (&type_rw_lock);
1009 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1011 check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (node), NODE_NAME (node), &tmp_info);
1012 type_data_make_W (node, &tmp_info,
1013 check_value_table_I (NODE_NAME (node),
1014 &tmp_value_table) ? &tmp_value_table : NULL);
1018 g_assert (node->data->common.ref_count > 0);
1020 node->data->common.ref_count += 1;
1025 type_data_unref_Wm (TypeNode *node,
1028 g_assert (node->data && node->data->common.ref_count);
1030 if (node->data->common.ref_count > 1)
1031 node->data->common.ref_count -= 1;
1036 g_warning ("static type `%s' unreferenced too often",
1041 type_data_last_unref_Wm (NODE_TYPE (node), uncached);
1046 type_node_add_iface_entry_W (TypeNode *node,
1049 IFaceEntry *entries;
1052 g_assert (node->is_instantiatable && CLASSED_NODE_N_IFACES (node) < MAX_N_IFACES);
1054 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1055 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1056 if (entries[i].iface_type == iface_type)
1058 /* this can (should) only happen if our parent type already conformed
1059 * to iface_type and node got it's own holder info. here, our
1060 * children should already have entries with NULL vtables, so
1061 * we're actually done.
1063 g_assert (entries[i].vtable == NULL);
1066 else if (entries[i].iface_type > iface_type)
1068 CLASSED_NODE_N_IFACES (node) += 1;
1069 CLASSED_NODE_IFACES_ENTRIES (node) = g_renew (IFaceEntry,
1070 CLASSED_NODE_IFACES_ENTRIES (node),
1071 CLASSED_NODE_N_IFACES (node));
1072 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1073 g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (CLASSED_NODE_N_IFACES (node) - i - 1));
1074 entries[i].iface_type = iface_type;
1075 entries[i].vtable = NULL;
1077 for (i = 0; i < node->n_children; i++)
1078 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), iface_type);
1082 type_add_interface_W (TypeNode *node,
1084 const GInterfaceInfo *info,
1085 GTypePlugin *plugin)
1087 IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
1089 /* we must not call any functions of GInterfaceInfo from within here, since
1090 * we got most probably called from _within_ a type registration function
1092 g_assert (node->is_instantiatable && NODE_IS_IFACE (iface) && ((info && !plugin) || (!info && plugin)));
1094 iholder->next = iface_node_get_holders_L (iface);
1095 iface_node_set_holders_W (iface, iholder);
1096 iholder->instance_type = NODE_TYPE (node);
1097 iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
1098 iholder->plugin = plugin;
1100 type_node_add_iface_entry_W (node, NODE_TYPE (iface));
1104 type_iface_add_prerequisite_W (TypeNode *iface,
1105 TypeNode *prerequisite_node)
1107 GType prerequisite_type = NODE_TYPE (prerequisite_node);
1108 GType *prerequisites, *dependants;
1109 guint n_dependants, i;
1111 g_assert (NODE_IS_IFACE (iface) &&
1112 IFACE_NODE_N_PREREQUISITES (iface) < MAX_N_PREREQUISITES &&
1113 (prerequisite_node->is_instantiatable || NODE_IS_IFACE (prerequisite_node)));
1115 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1116 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1117 if (prerequisites[i] == prerequisite_type)
1118 return; /* we already have that prerequisiste */
1119 else if (prerequisites[i] > prerequisite_type)
1121 IFACE_NODE_N_PREREQUISITES (iface) += 1;
1122 IFACE_NODE_PREREQUISITES (iface) = g_renew (GType,
1123 IFACE_NODE_PREREQUISITES (iface),
1124 IFACE_NODE_N_PREREQUISITES (iface));
1125 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1126 g_memmove (prerequisites + i + 1, prerequisites + i,
1127 sizeof (prerequisites[0]) * (IFACE_NODE_N_PREREQUISITES (iface) - i - 1));
1128 prerequisites[i] = prerequisite_type;
1130 /* we want to get notified when prerequisites get added to prerequisite_node */
1131 if (NODE_IS_IFACE (prerequisite_node))
1133 dependants = iface_node_get_dependants_array_L (prerequisite_node);
1134 n_dependants = dependants ? dependants[0] : 0;
1136 dependants = g_renew (GType, dependants, n_dependants + 1);
1137 dependants[n_dependants] = NODE_TYPE (iface);
1138 dependants[0] = n_dependants;
1139 iface_node_set_dependants_array_W (prerequisite_node, dependants);
1142 /* we need to notify all dependants */
1143 dependants = iface_node_get_dependants_array_L (iface);
1144 n_dependants = dependants ? dependants[0] : 0;
1145 for (i = 1; i <= n_dependants; i++)
1146 type_iface_add_prerequisite_W (lookup_type_node_I (dependants[i]), prerequisite_node);
1150 g_type_interface_add_prerequisite (GType interface_type,
1151 GType prerequisite_type)
1153 TypeNode *iface, *prerequisite_node;
1154 IFaceHolder *holders;
1156 g_return_if_fail (G_TYPE_IS_INTERFACE (interface_type)); /* G_TYPE_IS_INTERFACE() is an external call: _U */
1157 g_return_if_fail (!g_type_is_a (interface_type, prerequisite_type));
1158 g_return_if_fail (!g_type_is_a (prerequisite_type, interface_type));
1160 iface = lookup_type_node_I (interface_type);
1161 prerequisite_node = lookup_type_node_I (prerequisite_type);
1162 if (!iface || !prerequisite_node || !NODE_IS_IFACE (iface))
1164 g_warning ("interface type `%s' or prerequisite type `%s' invalid",
1165 type_descriptive_name_I (interface_type),
1166 type_descriptive_name_I (prerequisite_type));
1169 G_WRITE_LOCK (&type_rw_lock);
1170 holders = iface_node_get_holders_L (iface);
1173 G_WRITE_UNLOCK (&type_rw_lock);
1174 g_warning ("unable to add prerequisite `%s' to interface `%s' which is already in use for `%s'",
1175 type_descriptive_name_I (prerequisite_type),
1176 type_descriptive_name_I (interface_type),
1177 type_descriptive_name_I (holders->instance_type));
1180 if (prerequisite_node->is_instantiatable)
1184 /* can have at most one publically installable instantiatable prerequisite */
1185 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1187 TypeNode *prnode = lookup_type_node_I (IFACE_NODE_PREREQUISITES (iface)[i]);
1189 if (prnode->is_instantiatable)
1191 G_WRITE_UNLOCK (&type_rw_lock);
1192 g_warning ("adding prerequisite `%s' to interface `%s' conflicts with existing prerequisite `%s'",
1193 type_descriptive_name_I (prerequisite_type),
1194 type_descriptive_name_I (interface_type),
1195 type_descriptive_name_I (NODE_TYPE (prnode)));
1200 for (i = 0; i < prerequisite_node->n_supers + 1; i++)
1201 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisite_node->supers[i]));
1202 G_WRITE_UNLOCK (&type_rw_lock);
1204 else if (NODE_IS_IFACE (prerequisite_node))
1206 GType *prerequisites;
1209 prerequisites = IFACE_NODE_PREREQUISITES (prerequisite_node);
1210 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (prerequisite_node); i++)
1211 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisites[i]));
1212 type_iface_add_prerequisite_W (iface, prerequisite_node);
1213 G_WRITE_UNLOCK (&type_rw_lock);
1217 G_WRITE_UNLOCK (&type_rw_lock);
1218 g_warning ("prerequisite `%s' for interface `%s' is neither instantiatable nor interface",
1219 type_descriptive_name_I (prerequisite_type),
1220 type_descriptive_name_I (interface_type));
1225 * g_type_interface_prerequisites:
1226 * @interface_type: an interface type
1227 * @n_prerequisites: location to return the number of prerequisites, or %NULL
1229 * Returns the prerequisites of an interfaces type.
1231 * Return value: a newly-allocated zero-terminated array of #GType containing
1232 * the prerequisites of @interface_type
1236 GType* /* free result */
1237 g_type_interface_prerequisites (GType interface_type,
1238 guint *n_prerequisites)
1242 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
1244 iface = lookup_type_node_I (interface_type);
1248 TypeNode *inode = NULL;
1251 G_READ_LOCK (&type_rw_lock);
1252 types = g_new0 (GType, IFACE_NODE_N_PREREQUISITES (iface) + 1);
1253 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1255 GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
1256 TypeNode *node = lookup_type_node_I (prerequisite);
1257 if (node->is_instantiatable &&
1258 (!inode || type_node_is_a_L (node, inode)))
1261 types[n++] = NODE_TYPE (node);
1264 types[n++] = NODE_TYPE (inode);
1266 if (n_prerequisites)
1267 *n_prerequisites = n;
1268 G_READ_UNLOCK (&type_rw_lock);
1274 if (n_prerequisites)
1275 *n_prerequisites = 0;
1283 type_iface_peek_holder_L (TypeNode *iface,
1284 GType instance_type)
1286 IFaceHolder *iholder;
1288 g_assert (NODE_IS_IFACE (iface));
1290 iholder = iface_node_get_holders_L (iface);
1291 while (iholder && iholder->instance_type != instance_type)
1292 iholder = iholder->next;
1297 type_iface_retrieve_holder_info_Wm (TypeNode *iface,
1298 GType instance_type,
1301 IFaceHolder *iholder = type_iface_peek_holder_L (iface, instance_type);
1303 if (iholder && !iholder->info && need_info)
1305 GInterfaceInfo tmp_info;
1307 g_assert (iholder->plugin != NULL);
1309 type_data_ref_Wm (iface);
1311 INVALID_RECURSION ("g_type_plugin_*", iface->plugin, NODE_NAME (iface));
1313 memset (&tmp_info, 0, sizeof (tmp_info));
1315 G_WRITE_UNLOCK (&type_rw_lock);
1316 g_type_plugin_use (iholder->plugin);
1317 g_type_plugin_complete_interface_info (iholder->plugin, instance_type, NODE_TYPE (iface), &tmp_info);
1318 G_WRITE_LOCK (&type_rw_lock);
1320 INVALID_RECURSION ("g_type_plugin_*", iholder->plugin, NODE_NAME (iface));
1322 check_interface_info_I (iface, instance_type, &tmp_info);
1323 iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
1326 return iholder; /* we don't modify write lock upon returning NULL */
1330 type_iface_blow_holder_info_Wm (TypeNode *iface,
1331 GType instance_type)
1333 IFaceHolder *iholder = iface_node_get_holders_L (iface);
1335 g_assert (NODE_IS_IFACE (iface));
1337 while (iholder->instance_type != instance_type)
1338 iholder = iholder->next;
1340 if (iholder->info && iholder->plugin)
1342 g_free (iholder->info);
1343 iholder->info = NULL;
1345 G_WRITE_UNLOCK (&type_rw_lock);
1346 g_type_plugin_unuse (iholder->plugin);
1347 G_WRITE_LOCK (&type_rw_lock);
1349 type_data_unref_Wm (iface, FALSE);
1354 /* --- type structure creation/destruction --- */
1356 g_type_create_instance (GType type)
1359 GTypeInstance *instance;
1363 node = lookup_type_node_I (type);
1364 if (!node || !node->is_instantiatable)
1366 g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
1367 type_descriptive_name_I (type));
1370 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1371 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
1373 g_warning ("cannot create instance of abstract (non-instantiatable) type `%s'",
1374 type_descriptive_name_I (type));
1378 class = g_type_class_ref (type);
1380 if (node->data->instance.n_preallocs)
1382 G_WRITE_LOCK (&type_rw_lock);
1383 if (!node->data->instance.mem_chunk)
1384 node->data->instance.mem_chunk = g_mem_chunk_new (NODE_NAME (node),
1385 node->data->instance.instance_size,
1386 (node->data->instance.instance_size *
1387 node->data->instance.n_preallocs),
1389 instance = g_chunk_new0 (GTypeInstance, node->data->instance.mem_chunk);
1390 G_WRITE_UNLOCK (&type_rw_lock);
1393 instance = g_malloc0 (node->data->instance.instance_size); /* fine without read lock */
1394 for (i = node->n_supers; i > 0; i--)
1398 pnode = lookup_type_node_I (node->supers[i]);
1399 if (pnode->data->instance.instance_init)
1401 instance->g_class = pnode->data->instance.class;
1402 pnode->data->instance.instance_init (instance, class);
1405 instance->g_class = class;
1407 if (node->data->instance.instance_init)
1408 node->data->instance.instance_init (instance, class);
1414 g_type_free_instance (GTypeInstance *instance)
1419 g_return_if_fail (instance != NULL && instance->g_class != NULL);
1421 class = instance->g_class;
1422 node = lookup_type_node_I (class->g_type);
1423 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != (gpointer) class)
1425 g_warning ("cannot free instance of invalid (non-instantiatable) type `%s'",
1426 type_descriptive_name_I (class->g_type));
1429 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1430 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (NODE_TYPE (node)))
1432 g_warning ("cannot free instance of abstract (non-instantiatable) type `%s'",
1437 instance->g_class = NULL;
1438 #ifdef G_ENABLE_DEBUG
1439 memset (instance, 0xaa, node->data->instance.instance_size); /* debugging hack */
1441 if (node->data->instance.n_preallocs)
1443 G_WRITE_LOCK (&type_rw_lock);
1444 g_chunk_free (instance, node->data->instance.mem_chunk);
1445 G_WRITE_UNLOCK (&type_rw_lock);
1450 g_type_class_unref (class);
1454 type_iface_vtable_init_Wm (TypeNode *iface,
1457 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1458 IFaceHolder *iholder;
1459 GTypeInterface *vtable = NULL;
1462 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1463 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), TRUE);
1465 return FALSE; /* we don't modify write lock upon FALSE */
1467 g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
1469 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1470 if (pnode) /* want to copy over parent iface contents */
1472 IFaceEntry *pentry = type_lookup_iface_entry_L (pnode, iface);
1475 vtable = g_memdup (pentry->vtable, iface->data->iface.vtable_size);
1478 vtable = g_malloc0 (iface->data->iface.vtable_size);
1479 entry->vtable = vtable;
1480 vtable->g_type = NODE_TYPE (iface);
1481 vtable->g_instance_type = NODE_TYPE (node);
1483 if (iface->data->iface.vtable_init_base || iholder->info->interface_init)
1485 G_WRITE_UNLOCK (&type_rw_lock);
1486 if (iface->data->iface.vtable_init_base)
1487 iface->data->iface.vtable_init_base (vtable);
1488 if (iholder->info->interface_init)
1489 iholder->info->interface_init (vtable, iholder->info->interface_data);
1490 G_WRITE_LOCK (&type_rw_lock);
1492 return TRUE; /* write lock modified */
1496 type_iface_vtable_finalize_Wm (TypeNode *iface,
1498 GTypeInterface *vtable)
1500 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1501 IFaceHolder *iholder;
1503 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1504 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), FALSE);
1506 return FALSE; /* we don't modify write lock upon FALSE */
1508 g_assert (entry && entry->vtable == vtable && iholder->info);
1510 entry->vtable = NULL;
1511 if (iholder->info->interface_finalize || iface->data->iface.vtable_finalize_base)
1513 G_WRITE_UNLOCK (&type_rw_lock);
1514 if (iholder->info->interface_finalize)
1515 iholder->info->interface_finalize (vtable, iholder->info->interface_data);
1516 if (iface->data->iface.vtable_finalize_base)
1517 iface->data->iface.vtable_finalize_base (vtable);
1518 G_WRITE_LOCK (&type_rw_lock);
1521 vtable->g_instance_type = 0;
1524 type_iface_blow_holder_info_Wm (iface, NODE_TYPE (node));
1526 return TRUE; /* write lock modified */
1530 type_class_init_Wm (TypeNode *node,
1533 GSList *slist, *init_slist = NULL;
1536 TypeNode *bnode, *pnode;
1539 g_assert (node->is_classed && node->data &&
1540 node->data->class.class_size &&
1541 !node->data->class.class);
1543 class = g_malloc0 (node->data->class.class_size);
1544 node->data->class.class = class;
1548 TypeNode *pnode = lookup_type_node_I (pclass->g_type);
1550 memcpy (class, pclass, pnode->data->class.class_size);
1552 class->g_type = NODE_TYPE (node);
1554 G_WRITE_UNLOCK (&type_rw_lock);
1556 /* stack all base class initialization functions, so we
1557 * call them in ascending order.
1559 for (bnode = node; bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1560 if (bnode->data->class.class_init_base)
1561 init_slist = g_slist_prepend (init_slist, (gpointer) bnode->data->class.class_init_base);
1562 for (slist = init_slist; slist; slist = slist->next)
1564 GBaseInitFunc class_init_base = (GBaseInitFunc) slist->data;
1566 class_init_base (class);
1568 g_slist_free (init_slist);
1570 if (node->data->class.class_init)
1571 node->data->class.class_init (class, (gpointer) node->data->class.class_data);
1573 G_WRITE_LOCK (&type_rw_lock);
1575 /* ok, we got the class done, now initialize all interfaces, either
1576 * from parent, or through our holder info
1578 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1579 entry = CLASSED_NODE_IFACES_ENTRIES (node) + 0;
1582 g_assert (entry->vtable == NULL);
1584 if (!type_iface_vtable_init_Wm (lookup_type_node_I (entry->iface_type), node))
1588 /* type_iface_vtable_init_Wm() doesn't modify write lock upon FALSE,
1589 * need to get this interface from parent
1591 g_assert (pnode != NULL);
1593 for (j = 0; j < CLASSED_NODE_N_IFACES (pnode); j++)
1595 IFaceEntry *pentry = CLASSED_NODE_IFACES_ENTRIES (pnode) + j;
1597 if (pentry->iface_type == entry->iface_type)
1599 entry->vtable = pentry->vtable;
1603 g_assert (entry->vtable != NULL);
1606 /* refetch entry, IFACES_ENTRIES might be modified */
1607 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1608 if (!CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable)
1609 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1614 type_data_finalize_class_ifaces_Wm (TypeNode *node)
1619 g_assert (node->is_instantiatable && node->data && node->data->class.class && node->data->common.ref_count == 0);
1621 g_message ("finalizing interfaces for %sClass `%s'",
1622 type_descriptive_name_I (NODE_FUNDAMENTAL_TYPE (node)),
1623 type_descriptive_name_I (NODE_TYPE (node)));
1625 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1626 if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
1627 CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
1628 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1631 if (!type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
1633 /* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
1634 * iface vtable came from parent
1636 entry->vtable = NULL;
1639 /* refetch entry, IFACES_ENTRIES might be modified */
1640 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1641 if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
1642 CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
1643 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1648 type_data_finalize_class_U (TypeNode *node,
1651 GTypeClass *class = cdata->class;
1654 g_assert (cdata->class && cdata->common.ref_count == 0);
1656 if (cdata->class_finalize)
1657 cdata->class_finalize (class, (gpointer) cdata->class_data);
1659 /* call all base class destruction functions in descending order
1661 if (cdata->class_finalize_base)
1662 cdata->class_finalize_base (class);
1663 for (bnode = lookup_type_node_I (NODE_PARENT_TYPE (node)); bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1664 if (bnode->data->class.class_finalize_base)
1665 bnode->data->class.class_finalize_base (class);
1668 g_free (cdata->class);
1672 type_data_last_unref_Wm (GType type,
1675 TypeNode *node = lookup_type_node_I (type);
1677 g_return_if_fail (node != NULL && node->plugin != NULL);
1679 if (!node->data || node->data->common.ref_count == 0)
1681 g_warning ("cannot drop last reference to unreferenced type `%s'",
1682 type_descriptive_name_I (type));
1686 if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs)
1690 G_WRITE_UNLOCK (&type_rw_lock);
1691 G_READ_LOCK (&type_rw_lock);
1692 for (i = 0; i < static_n_class_cache_funcs; i++)
1694 GTypeClassCacheFunc cache_func = static_class_cache_funcs[i].cache_func;
1695 gpointer cache_data = static_class_cache_funcs[i].cache_data;
1696 gboolean need_break;
1698 G_READ_UNLOCK (&type_rw_lock);
1699 need_break = cache_func (cache_data, node->data->class.class);
1700 G_READ_LOCK (&type_rw_lock);
1701 if (!node->data || node->data->common.ref_count == 0)
1702 INVALID_RECURSION ("GType class cache function ", cache_func, NODE_NAME (node));
1706 G_READ_UNLOCK (&type_rw_lock);
1707 G_WRITE_LOCK (&type_rw_lock);
1710 if (node->data->common.ref_count > 1) /* may have been re-referenced meanwhile */
1711 node->data->common.ref_count -= 1;
1714 GType ptype = NODE_PARENT_TYPE (node);
1717 node->data->common.ref_count = 0;
1719 if (node->is_instantiatable && node->data->instance.mem_chunk)
1721 g_mem_chunk_destroy (node->data->instance.mem_chunk);
1722 node->data->instance.mem_chunk = NULL;
1726 if (node->is_classed && tdata->class.class)
1728 if (CLASSED_NODE_N_IFACES (node))
1729 type_data_finalize_class_ifaces_Wm (node);
1730 node->mutatable_check_cache = FALSE;
1732 G_WRITE_UNLOCK (&type_rw_lock);
1733 type_data_finalize_class_U (node, &tdata->class);
1734 G_WRITE_LOCK (&type_rw_lock);
1738 node->mutatable_check_cache = FALSE;
1742 /* freeing tdata->common.value_table and its contents is taking care of
1743 * by allocating it in one chunk with tdata
1748 type_data_unref_Wm (lookup_type_node_I (ptype), FALSE);
1749 G_WRITE_UNLOCK (&type_rw_lock);
1750 g_type_plugin_unuse (node->plugin);
1751 G_WRITE_LOCK (&type_rw_lock);
1756 g_type_add_class_cache_func (gpointer cache_data,
1757 GTypeClassCacheFunc cache_func)
1761 g_return_if_fail (cache_func != NULL);
1763 G_WRITE_LOCK (&type_rw_lock);
1764 i = static_n_class_cache_funcs++;
1765 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
1766 static_class_cache_funcs[i].cache_data = cache_data;
1767 static_class_cache_funcs[i].cache_func = cache_func;
1768 G_WRITE_UNLOCK (&type_rw_lock);
1772 g_type_remove_class_cache_func (gpointer cache_data,
1773 GTypeClassCacheFunc cache_func)
1775 gboolean found_it = FALSE;
1778 g_return_if_fail (cache_func != NULL);
1780 G_WRITE_LOCK (&type_rw_lock);
1781 for (i = 0; i < static_n_class_cache_funcs; i++)
1782 if (static_class_cache_funcs[i].cache_data == cache_data &&
1783 static_class_cache_funcs[i].cache_func == cache_func)
1785 static_n_class_cache_funcs--;
1786 g_memmove (static_class_cache_funcs + i,
1787 static_class_cache_funcs + i + 1,
1788 sizeof (static_class_cache_funcs[0]) * (static_n_class_cache_funcs - i));
1789 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
1793 G_WRITE_UNLOCK (&type_rw_lock);
1796 g_warning (G_STRLOC ": cannot remove unregistered class cache func %p with data %p",
1797 cache_func, cache_data);
1801 /* --- type registration --- */
1803 g_type_register_fundamental (GType type_id,
1804 const gchar *type_name,
1805 const GTypeInfo *info,
1806 const GTypeFundamentalInfo *finfo,
1809 GTypeFundamentalInfo *node_finfo;
1812 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1813 g_return_val_if_fail (type_id > 0, 0);
1814 g_return_val_if_fail (type_name != NULL, 0);
1815 g_return_val_if_fail (info != NULL, 0);
1816 g_return_val_if_fail (finfo != NULL, 0);
1818 if (!check_type_name_I (type_name))
1820 if ((type_id & TYPE_ID_MASK) ||
1821 type_id > G_TYPE_FUNDAMENTAL_MAX)
1823 g_warning ("attempt to register fundamental type `%s' with invalid type id (%lu)",
1828 if ((finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
1829 !(finfo->type_flags & G_TYPE_FLAG_CLASSED))
1831 g_warning ("cannot register instantiatable fundamental type `%s' as non-classed",
1835 if (lookup_type_node_I (type_id))
1837 g_warning ("cannot register existing fundamental type `%s' (as `%s')",
1838 type_descriptive_name_I (type_id),
1843 G_WRITE_LOCK (&type_rw_lock);
1844 node = type_node_fundamental_new_W (type_id, type_name, finfo->type_flags);
1845 node_finfo = type_node_fundamental_info_I (node);
1846 type_add_flags_W (node, flags);
1848 if (check_type_info_I (NULL, NODE_FUNDAMENTAL_TYPE (node), type_name, info))
1849 type_data_make_W (node, info,
1850 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
1851 G_WRITE_UNLOCK (&type_rw_lock);
1853 return NODE_TYPE (node);
1857 g_type_register_static (GType parent_type,
1858 const gchar *type_name,
1859 const GTypeInfo *info,
1862 TypeNode *pnode, *node;
1865 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1866 g_return_val_if_fail (parent_type > 0, 0);
1867 g_return_val_if_fail (type_name != NULL, 0);
1868 g_return_val_if_fail (info != NULL, 0);
1870 if (!check_type_name_I (type_name) ||
1871 !check_derivation_I (parent_type, type_name))
1873 if (info->class_finalize)
1875 g_warning ("class finalizer specified for static type `%s'",
1880 pnode = lookup_type_node_I (parent_type);
1881 G_WRITE_LOCK (&type_rw_lock);
1882 type_data_ref_Wm (pnode);
1883 if (check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (pnode), type_name, info))
1885 node = type_node_new_W (pnode, type_name, NULL);
1886 type_add_flags_W (node, flags);
1887 type = NODE_TYPE (node);
1888 type_data_make_W (node, info,
1889 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
1891 G_WRITE_UNLOCK (&type_rw_lock);
1897 g_type_register_dynamic (GType parent_type,
1898 const gchar *type_name,
1899 GTypePlugin *plugin,
1902 TypeNode *pnode, *node;
1905 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1906 g_return_val_if_fail (parent_type > 0, 0);
1907 g_return_val_if_fail (type_name != NULL, 0);
1908 g_return_val_if_fail (plugin != NULL, 0);
1910 if (!check_type_name_I (type_name) ||
1911 !check_derivation_I (parent_type, type_name) ||
1912 !check_plugin_U (plugin, TRUE, FALSE, type_name))
1915 G_WRITE_LOCK (&type_rw_lock);
1916 pnode = lookup_type_node_I (parent_type);
1917 node = type_node_new_W (pnode, type_name, plugin);
1918 type_add_flags_W (node, flags);
1919 type = NODE_TYPE (node);
1920 G_WRITE_UNLOCK (&type_rw_lock);
1926 g_type_add_interface_static (GType instance_type,
1927 GType interface_type,
1928 const GInterfaceInfo *info)
1930 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
1931 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
1932 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
1934 G_WRITE_LOCK (&type_rw_lock);
1935 if (check_add_interface_L (instance_type, interface_type))
1937 TypeNode *node = lookup_type_node_I (instance_type);
1938 TypeNode *iface = lookup_type_node_I (interface_type);
1940 if (check_interface_info_I (iface, NODE_TYPE (node), info))
1942 type_add_interface_W (node, iface, info, NULL);
1943 /* if we have a class already, the interface vtable needs to
1944 * be initialized as well
1946 if (node->data && node->data->class.class)
1947 type_iface_vtable_init_Wm (iface, node);
1950 G_WRITE_UNLOCK (&type_rw_lock);
1954 g_type_add_interface_dynamic (GType instance_type,
1955 GType interface_type,
1956 GTypePlugin *plugin)
1960 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
1961 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
1962 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
1964 node = lookup_type_node_I (instance_type);
1965 if (!check_plugin_U (plugin, FALSE, TRUE, NODE_NAME (node)))
1968 G_WRITE_LOCK (&type_rw_lock);
1969 if (check_add_interface_L (instance_type, interface_type))
1971 TypeNode *iface = lookup_type_node_I (interface_type);
1973 type_add_interface_W (node, iface, NULL, plugin);
1974 /* if we have a class already, the interface vtable needs to
1975 * be initialized as well
1977 if (node->data && node->data->class.class)
1978 type_iface_vtable_init_Wm (iface, node);
1980 G_WRITE_UNLOCK (&type_rw_lock);
1984 /* --- public API functions --- */
1986 g_type_class_ref (GType type)
1990 /* optimize for common code path
1992 G_WRITE_LOCK (&type_rw_lock);
1993 node = lookup_type_node_I (type);
1994 if (node && node->is_classed && node->data &&
1995 node->data->class.class && node->data->common.ref_count > 0)
1997 type_data_ref_Wm (node);
1998 G_WRITE_UNLOCK (&type_rw_lock);
2000 return node->data->class.class;
2003 if (!node || !node->is_classed ||
2004 (node->data && node->data->common.ref_count < 1))
2006 G_WRITE_UNLOCK (&type_rw_lock);
2007 g_warning ("cannot retrieve class for invalid (unclassed) type `%s'",
2008 type_descriptive_name_I (type));
2012 type_data_ref_Wm (node);
2014 if (!node->data->class.class)
2016 GType ptype = NODE_PARENT_TYPE (node);
2017 GTypeClass *pclass = NULL;
2021 G_WRITE_UNLOCK (&type_rw_lock);
2022 pclass = g_type_class_ref (ptype);
2023 if (node->data->class.class)
2024 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
2025 G_WRITE_LOCK (&type_rw_lock);
2028 type_class_init_Wm (node, pclass);
2030 G_WRITE_UNLOCK (&type_rw_lock);
2032 return node->data->class.class;
2036 g_type_class_unref (gpointer g_class)
2039 GTypeClass *class = g_class;
2041 g_return_if_fail (g_class != NULL);
2043 node = lookup_type_node_I (class->g_type);
2044 G_WRITE_LOCK (&type_rw_lock);
2045 if (node && node->is_classed && node->data &&
2046 node->data->class.class == class && node->data->common.ref_count > 0)
2047 type_data_unref_Wm (node, FALSE);
2049 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2050 type_descriptive_name_I (class->g_type));
2051 G_WRITE_UNLOCK (&type_rw_lock);
2055 g_type_class_unref_uncached (gpointer g_class)
2058 GTypeClass *class = g_class;
2060 g_return_if_fail (g_class != NULL);
2062 G_WRITE_LOCK (&type_rw_lock);
2063 node = lookup_type_node_I (class->g_type);
2064 if (node && node->is_classed && node->data &&
2065 node->data->class.class == class && node->data->common.ref_count > 0)
2066 type_data_unref_Wm (node, TRUE);
2068 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2069 type_descriptive_name_I (class->g_type));
2070 G_WRITE_UNLOCK (&type_rw_lock);
2074 g_type_class_peek (GType type)
2079 node = lookup_type_node_I (type);
2080 G_READ_LOCK (&type_rw_lock);
2081 if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
2082 class = node->data->class.class;
2085 G_READ_UNLOCK (&type_rw_lock);
2091 g_type_class_peek_parent (gpointer g_class)
2094 gpointer class = NULL;
2096 g_return_val_if_fail (g_class != NULL, NULL);
2098 node = lookup_type_node_I (G_TYPE_FROM_CLASS (g_class));
2099 G_READ_LOCK (&type_rw_lock);
2100 if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
2102 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2103 class = node->data->class.class;
2105 else if (NODE_PARENT_TYPE (node))
2106 g_warning (G_STRLOC ": invalid class pointer `%p'", g_class);
2107 G_READ_UNLOCK (&type_rw_lock);
2113 g_type_interface_peek (gpointer instance_class,
2118 gpointer vtable = NULL;
2119 GTypeClass *class = instance_class;
2121 g_return_val_if_fail (instance_class != NULL, NULL);
2123 node = lookup_type_node_I (class->g_type);
2124 iface = lookup_type_node_I (iface_type);
2125 if (node && node->is_instantiatable && iface)
2129 G_READ_LOCK (&type_rw_lock);
2131 entry = type_lookup_iface_entry_L (node, iface);
2132 if (entry && entry->vtable) /* entry is relocatable */
2133 vtable = entry->vtable;
2135 G_READ_UNLOCK (&type_rw_lock);
2138 g_warning (G_STRLOC ": invalid class pointer `%p'", class);
2144 g_type_interface_peek_parent (gpointer g_iface)
2148 gpointer vtable = NULL;
2149 GTypeInterface *iface_class = g_iface;
2151 g_return_val_if_fail (g_iface != NULL, NULL);
2153 iface = lookup_type_node_I (iface_class->g_type);
2154 node = lookup_type_node_I (iface_class->g_instance_type);
2156 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2157 if (node && node->is_instantiatable && iface)
2161 G_READ_LOCK (&type_rw_lock);
2163 entry = type_lookup_iface_entry_L (node, iface);
2164 if (entry && entry->vtable) /* entry is relocatable */
2165 vtable = entry->vtable;
2167 G_READ_UNLOCK (&type_rw_lock);
2170 g_warning (G_STRLOC ": invalid interface pointer `%p'", g_iface);
2175 G_CONST_RETURN gchar*
2176 g_type_name (GType type)
2180 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, NULL);
2182 node = lookup_type_node_I (type);
2184 return node ? NODE_NAME (node) : NULL;
2188 g_type_qname (GType type)
2192 node = lookup_type_node_I (type);
2194 return node ? node->qname : 0;
2198 g_type_from_name (const gchar *name)
2203 g_return_val_if_fail (name != NULL, 0);
2205 quark = g_quark_try_string (name);
2208 G_READ_LOCK (&type_rw_lock);
2209 type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
2210 G_READ_UNLOCK (&type_rw_lock);
2217 g_type_parent (GType type)
2221 node = lookup_type_node_I (type);
2223 return node ? NODE_PARENT_TYPE (node) : 0;
2227 g_type_depth (GType type)
2231 node = lookup_type_node_I (type);
2233 return node ? node->n_supers + 1 : 0;
2237 g_type_next_base (GType type,
2243 node = lookup_type_node_I (type);
2246 TypeNode *base_node = lookup_type_node_I (base_type);
2248 if (base_node && base_node->n_supers < node->n_supers)
2250 guint n = node->n_supers - base_node->n_supers;
2252 if (node->supers[n] == base_type)
2253 atype = node->supers[n - 1];
2260 static inline gboolean
2261 type_node_check_conformities_UorL (TypeNode *node,
2262 TypeNode *iface_node,
2263 /* support_inheritance */
2264 gboolean support_interfaces,
2265 gboolean support_prerequisites,
2270 if (/* support_inheritance && */
2271 iface_node->n_supers <= node->n_supers &&
2272 node->supers[node->n_supers - iface_node->n_supers] == NODE_TYPE (iface_node))
2275 support_interfaces = support_interfaces && node->is_instantiatable && NODE_IS_IFACE (iface_node);
2276 support_prerequisites = support_prerequisites && NODE_IS_IFACE (node);
2278 if (support_interfaces || support_prerequisites)
2281 G_READ_LOCK (&type_rw_lock);
2282 if (support_interfaces && type_lookup_iface_entry_L (node, iface_node))
2284 else if (support_prerequisites && type_lookup_prerequisite_L (node, NODE_TYPE (iface_node)))
2287 G_READ_UNLOCK (&type_rw_lock);
2293 type_node_is_a_L (TypeNode *node,
2294 TypeNode *iface_node)
2296 return type_node_check_conformities_UorL (node, iface_node, TRUE, TRUE, TRUE);
2299 static inline gboolean
2300 type_node_conforms_to_U (TypeNode *node,
2301 TypeNode *iface_node,
2302 gboolean support_interfaces,
2303 gboolean support_prerequisites)
2305 return type_node_check_conformities_UorL (node, iface_node, support_interfaces, support_prerequisites, FALSE);
2309 g_type_is_a (GType type,
2312 TypeNode *node, *iface_node;
2315 node = lookup_type_node_I (type);
2316 iface_node = lookup_type_node_I (iface_type);
2317 is_a = node && iface_node && type_node_conforms_to_U (node, iface_node, TRUE, TRUE);
2322 GType* /* free result */
2323 g_type_children (GType type,
2328 node = lookup_type_node_I (type);
2333 G_READ_LOCK (&type_rw_lock); /* ->children is relocatable */
2334 children = g_new (GType, node->n_children + 1);
2335 memcpy (children, node->children, sizeof (GType) * node->n_children);
2336 children[node->n_children] = 0;
2339 *n_children = node->n_children;
2340 G_READ_UNLOCK (&type_rw_lock);
2353 GType* /* free result */
2354 g_type_interfaces (GType type,
2355 guint *n_interfaces)
2359 node = lookup_type_node_I (type);
2360 if (node && node->is_instantiatable)
2365 G_READ_LOCK (&type_rw_lock);
2366 ifaces = g_new (GType, CLASSED_NODE_N_IFACES (node) + 1);
2367 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
2368 ifaces[i] = CLASSED_NODE_IFACES_ENTRIES (node)[i].iface_type;
2372 *n_interfaces = CLASSED_NODE_N_IFACES (node);
2373 G_READ_UNLOCK (&type_rw_lock);
2386 typedef struct _QData QData;
2398 static inline gpointer
2399 type_get_qdata_L (TypeNode *node,
2402 GData *gdata = node->global_gdata;
2404 if (quark && gdata && gdata->n_qdatas)
2406 QData *qdatas = gdata->qdatas - 1;
2407 guint n_qdatas = gdata->n_qdatas;
2414 i = (n_qdatas + 1) / 2;
2416 if (quark == check->quark)
2418 else if (quark > check->quark)
2423 else /* if (quark < check->quark) */
2432 g_type_get_qdata (GType type,
2438 node = lookup_type_node_I (type);
2441 G_READ_LOCK (&type_rw_lock);
2442 data = type_get_qdata_L (node, quark);
2443 G_READ_UNLOCK (&type_rw_lock);
2447 g_return_val_if_fail (node != NULL, NULL);
2454 type_set_qdata_W (TypeNode *node,
2462 /* setup qdata list if necessary */
2463 if (!node->global_gdata)
2464 node->global_gdata = g_new0 (GData, 1);
2465 gdata = node->global_gdata;
2467 /* try resetting old data */
2468 qdata = gdata->qdatas;
2469 for (i = 0; i < gdata->n_qdatas; i++)
2470 if (qdata[i].quark == quark)
2472 qdata[i].data = data;
2478 gdata->qdatas = g_renew (QData, gdata->qdatas, gdata->n_qdatas);
2479 qdata = gdata->qdatas;
2480 for (i = 0; i < gdata->n_qdatas - 1; i++)
2481 if (qdata[i].quark > quark)
2483 g_memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
2484 qdata[i].quark = quark;
2485 qdata[i].data = data;
2489 g_type_set_qdata (GType type,
2495 g_return_if_fail (quark != 0);
2497 node = lookup_type_node_I (type);
2500 G_WRITE_LOCK (&type_rw_lock);
2501 type_set_qdata_W (node, quark, data);
2502 G_WRITE_UNLOCK (&type_rw_lock);
2505 g_return_if_fail (node != NULL);
2509 type_add_flags_W (TypeNode *node,
2514 g_return_if_fail ((flags & ~TYPE_FLAG_MASK) == 0);
2515 g_return_if_fail (node != NULL);
2517 if ((flags & TYPE_FLAG_MASK) && node->is_classed && node->data && node->data->class.class)
2518 g_warning ("tagging type `%s' as abstract after class initialization", NODE_NAME (node));
2519 dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2521 type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
2525 g_type_query (GType type,
2530 g_return_if_fail (query != NULL);
2532 /* if node is not static and classed, we won't allow query */
2534 node = lookup_type_node_I (type);
2535 if (node && node->is_classed && !node->plugin)
2537 /* type is classed and probably even instantiatable */
2538 G_READ_LOCK (&type_rw_lock);
2539 if (node->data) /* type is static or referenced */
2541 query->type = NODE_TYPE (node);
2542 query->type_name = NODE_NAME (node);
2543 query->class_size = node->data->class.class_size;
2544 query->instance_size = node->is_instantiatable ? node->data->instance.instance_size : 0;
2546 G_READ_UNLOCK (&type_rw_lock);
2551 /* --- implementation details --- */
2553 g_type_test_flags (GType type,
2557 gboolean result = FALSE;
2559 node = lookup_type_node_I (type);
2562 guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
2563 guint tflags = flags & TYPE_FLAG_MASK;
2567 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (node);
2569 fflags = (finfo->type_flags & fflags) == fflags;
2576 G_READ_LOCK (&type_rw_lock);
2577 tflags = (tflags & GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))) == tflags;
2578 G_READ_UNLOCK (&type_rw_lock);
2583 result = tflags && fflags;
2590 g_type_get_plugin (GType type)
2594 node = lookup_type_node_I (type);
2596 return node ? node->plugin : NULL;
2600 g_type_interface_get_plugin (GType instance_type,
2601 GType interface_type)
2606 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL); /* G_TYPE_IS_INTERFACE() is an external call: _U */
2608 node = lookup_type_node_I (instance_type);
2609 iface = lookup_type_node_I (interface_type);
2612 IFaceHolder *iholder;
2613 GTypePlugin *plugin;
2615 G_READ_LOCK (&type_rw_lock);
2617 iholder = iface_node_get_holders_L (iface);
2618 while (iholder && iholder->instance_type != instance_type)
2619 iholder = iholder->next;
2620 plugin = iholder ? iholder->plugin : NULL;
2622 G_READ_UNLOCK (&type_rw_lock);
2627 g_return_val_if_fail (node == NULL, NULL);
2628 g_return_val_if_fail (iface == NULL, NULL);
2630 g_warning (G_STRLOC ": attempt to look up plugin for invalid instance/interface type pair.");
2636 g_type_fundamental_next (void)
2640 G_READ_LOCK (&type_rw_lock);
2641 type = static_fundamental_next;
2642 G_READ_UNLOCK (&type_rw_lock);
2643 type = G_TYPE_MAKE_FUNDAMENTAL (type);
2644 return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
2648 g_type_fundamental (GType type_id)
2650 TypeNode *node = lookup_type_node_I (type_id);
2652 return node ? NODE_FUNDAMENTAL_TYPE (node) : 0;
2656 g_type_check_instance_is_a (GTypeInstance *type_instance,
2659 TypeNode *node, *iface;
2662 if (!type_instance || !type_instance->g_class)
2665 node = lookup_type_node_I (type_instance->g_class->g_type);
2666 iface = lookup_type_node_I (iface_type);
2667 check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
2673 g_type_check_class_is_a (GTypeClass *type_class,
2676 TypeNode *node, *iface;
2682 node = lookup_type_node_I (type_class->g_type);
2683 iface = lookup_type_node_I (is_a_type);
2684 check = node && node->is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
2690 g_type_check_instance_cast (GTypeInstance *type_instance,
2695 if (type_instance->g_class)
2697 TypeNode *node, *iface;
2698 gboolean is_instantiatable, check;
2700 node = lookup_type_node_I (type_instance->g_class->g_type);
2701 is_instantiatable = node && node->is_instantiatable;
2702 iface = lookup_type_node_I (iface_type);
2703 check = is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
2705 return type_instance;
2707 if (is_instantiatable)
2708 g_warning ("invalid cast from `%s' to `%s'",
2709 type_descriptive_name_I (type_instance->g_class->g_type),
2710 type_descriptive_name_I (iface_type));
2712 g_warning ("invalid uninstantiatable type `%s' in cast to `%s'",
2713 type_descriptive_name_I (type_instance->g_class->g_type),
2714 type_descriptive_name_I (iface_type));
2717 g_warning ("invalid unclassed pointer in cast to `%s'",
2718 type_descriptive_name_I (iface_type));
2721 return type_instance;
2725 g_type_check_class_cast (GTypeClass *type_class,
2730 TypeNode *node, *iface;
2731 gboolean is_classed, check;
2733 node = lookup_type_node_I (type_class->g_type);
2734 is_classed = node && node->is_classed;
2735 iface = lookup_type_node_I (is_a_type);
2736 check = is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
2741 g_warning ("invalid class cast from `%s' to `%s'",
2742 type_descriptive_name_I (type_class->g_type),
2743 type_descriptive_name_I (is_a_type));
2745 g_warning ("invalid unclassed type `%s' in class cast to `%s'",
2746 type_descriptive_name_I (type_class->g_type),
2747 type_descriptive_name_I (is_a_type));
2750 g_warning ("invalid class cast from (NULL) pointer to `%s'",
2751 type_descriptive_name_I (is_a_type));
2756 g_type_check_instance (GTypeInstance *type_instance)
2758 /* this function is just here to make the signal system
2759 * conveniently elaborated on instance checks
2763 if (type_instance->g_class)
2765 TypeNode *node = lookup_type_node_I (type_instance->g_class->g_type);
2767 if (node && node->is_instantiatable)
2770 g_warning ("instance of invalid non-instantiatable type `%s'",
2771 type_descriptive_name_I (type_instance->g_class->g_type));
2774 g_warning ("instance with invalid (NULL) class pointer");
2777 g_warning ("invalid (NULL) pointer instance");
2782 static inline gboolean
2783 type_check_is_value_type_U (GType type)
2785 GTypeFlags tflags = G_TYPE_FLAG_VALUE_ABSTRACT;
2788 /* common path speed up */
2789 node = lookup_type_node_I (type);
2790 if (node && node->mutatable_check_cache)
2793 G_READ_LOCK (&type_rw_lock);
2797 if (node->data && node->data->common.ref_count > 0 &&
2798 node->data->common.value_table->value_init)
2799 tflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2800 else if (NODE_IS_IFACE (node))
2804 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
2806 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
2807 TypeNode *prnode = lookup_type_node_I (prtype);
2809 if (prnode->is_instantiatable)
2812 node = lookup_type_node_I (type);
2818 G_READ_UNLOCK (&type_rw_lock);
2820 return !(tflags & G_TYPE_FLAG_VALUE_ABSTRACT);
2824 g_type_check_is_value_type (GType type)
2826 return type_check_is_value_type_U (type);
2830 g_type_check_value (GValue *value)
2832 return value && type_check_is_value_type_U (value->g_type);
2836 g_type_check_value_holds (GValue *value,
2839 return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
2843 g_type_value_table_peek (GType type)
2845 GTypeValueTable *vtable = NULL;
2846 TypeNode *node = lookup_type_node_I (type);
2847 gboolean has_refed_data, has_table;
2850 /* speed up common code path, we're not 100% safe here,
2851 * but we should only get called with referenced types anyway
2853 data = node ? node->data : NULL;
2854 if (node && node->mutatable_check_cache)
2855 return data->common.value_table;
2857 G_READ_LOCK (&type_rw_lock);
2860 has_refed_data = node && node->data && node->data->common.ref_count;
2861 has_table = has_refed_data && node->data->common.value_table->value_init;
2865 vtable = node->data->common.value_table;
2866 else if (NODE_IS_IFACE (node))
2870 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
2872 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
2873 TypeNode *prnode = lookup_type_node_I (prtype);
2875 if (prnode->is_instantiatable)
2878 node = lookup_type_node_I (type);
2879 goto restart_table_peek;
2885 G_READ_UNLOCK (&type_rw_lock);
2891 g_warning (G_STRLOC ": type id `%lu' is invalid", type);
2892 if (!has_refed_data)
2893 g_warning ("can't peek value table for type `%s' which is not currently referenced",
2894 type_descriptive_name_I (type));
2899 G_CONST_RETURN gchar*
2900 g_type_name_from_instance (GTypeInstance *instance)
2903 return "<NULL-instance>";
2905 return g_type_name_from_class (instance->g_class);
2908 G_CONST_RETURN gchar*
2909 g_type_name_from_class (GTypeClass *g_class)
2912 return "<NULL-class>";
2914 return g_type_name (g_class->g_type);
2918 /* --- foreign prototypes --- */
2919 extern void g_value_c_init (void); /* sync with gvalue.c */
2920 extern void g_value_types_init (void); /* sync with gvaluetypes.c */
2921 extern void g_enum_types_init (void); /* sync with genums.c */
2922 extern void g_param_type_init (void); /* sync with gparam.c */
2923 extern void g_boxed_type_init (void); /* sync with gboxed.c */
2924 extern void g_object_type_init (void); /* sync with gobject.c */
2925 extern void g_param_spec_types_init (void); /* sync with gparamspecs.c */
2926 extern void g_value_transforms_init (void); /* sync with gvaluetransform.c */
2927 extern void g_signal_init (void); /* sync with gsignal.c */
2930 /* --- initialization --- */
2932 g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
2934 G_LOCK_DEFINE_STATIC (type_init_lock);
2935 const gchar *env_string;
2940 G_LOCK (type_init_lock);
2942 G_WRITE_LOCK (&type_rw_lock);
2944 if (static_quark_type_flags)
2946 G_WRITE_UNLOCK (&type_rw_lock);
2947 G_UNLOCK (type_init_lock);
2951 /* setup GObject library wide debugging flags */
2952 _g_type_debug_flags = debug_flags & G_TYPE_DEBUG_MASK;
2953 env_string = g_getenv ("GOBJECT_DEBUG");
2954 if (env_string != NULL)
2956 static GDebugKey debug_keys[] = {
2957 { "objects", G_TYPE_DEBUG_OBJECTS },
2958 { "signals", G_TYPE_DEBUG_SIGNALS },
2961 _g_type_debug_flags |= g_parse_debug_string (env_string,
2963 sizeof (debug_keys) / sizeof (debug_keys[0]));
2968 static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
2969 static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
2970 static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
2972 /* type qname hash table */
2973 static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
2975 /* invalid type G_TYPE_INVALID (0)
2977 static_fundamental_type_nodes[0] = NULL;
2979 /* void type G_TYPE_NONE
2981 node = type_node_fundamental_new_W (G_TYPE_NONE, "void", 0);
2982 type = NODE_TYPE (node);
2983 g_assert (type == G_TYPE_NONE);
2985 /* interface fundamental type G_TYPE_INTERFACE (!classed)
2987 memset (&info, 0, sizeof (info));
2988 node = type_node_fundamental_new_W (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
2989 type = NODE_TYPE (node);
2990 type_data_make_W (node, &info, NULL);
2991 g_assert (type == G_TYPE_INTERFACE);
2993 G_WRITE_UNLOCK (&type_rw_lock);
2997 /* G_TYPE_TYPE_PLUGIN
2999 g_type_plugin_get_type ();
3001 /* G_TYPE_* value types
3003 g_value_types_init ();
3005 /* G_TYPE_ENUM & G_TYPE_FLAGS
3007 g_enum_types_init ();
3011 g_boxed_type_init ();
3015 g_param_type_init ();
3019 g_object_type_init ();
3021 /* G_TYPE_PARAM_* pspec types
3023 g_param_spec_types_init ();
3025 /* Value Transformations
3027 g_value_transforms_init ();
3033 G_UNLOCK (type_init_lock);
3039 g_type_init_with_debug_flags (0);