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.
25 #include "gtypeplugin.h"
26 #include "gvaluecollector.h"
30 /* NOTE: some functions (some internal variants and exported ones)
31 * invalidate data portions of the TypeNodes. if external functions/callbacks
32 * are called, pointers to memory maintained by TypeNodes have to be looked up
33 * again. this affects most of the struct TypeNode fields, e.g. ->children or
34 * CLASSED_NODE_IFACES_ENTRIES() respectively IFACE_NODE_PREREQUISITES() (but
35 * not ->supers[]), as all those memory portions can get realloc()ed during
36 * callback invocation.
39 * - g_type_from_name() should do an ordered array lookup after fetching the
40 * the quark, instead of a second hashtable lookup.
43 * lock handling issues when calling static functions are indicated by
44 * uppercase letter postfixes, all static functions have to have
45 * one of the below postfixes:
46 * - _I: [Indifferent about locking]
47 * function doesn't care about locks at all
48 * - _U: [Unlocked invocation]
49 * no read or write lock has to be held across function invocation
50 * (locks may be acquired and released during invocation though)
51 * - _L: [Locked invocation]
52 * a write lock or more than 0 read locks have to be held across
54 * - _W: [Write-locked invocation]
55 * a write lock has to be held across function invokation
56 * - _Wm: [Write-locked invocation, mutatable]
57 * like _W, but the write lock might be released and reacquired
58 * during invocation, watch your pointers
61 static GStaticRWLock type_rw_lock = G_STATIC_RW_LOCK_INIT;
63 #define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_static_rw_lock_reader_lock (rw_lock); } while (0)
64 #define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_static_rw_lock_reader_unlock (rw_lock); } while (0)
65 #define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_static_rw_lock_writer_lock (rw_lock); } while (0)
66 #define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_static_rw_lock_writer_unlock (rw_lock); } while (0)
68 #define G_READ_LOCK(rw_lock) g_static_rw_lock_reader_lock (rw_lock)
69 #define G_READ_UNLOCK(rw_lock) g_static_rw_lock_reader_unlock (rw_lock)
70 #define G_WRITE_LOCK(rw_lock) g_static_rw_lock_writer_lock (rw_lock)
71 #define G_WRITE_UNLOCK(rw_lock) g_static_rw_lock_writer_unlock (rw_lock)
73 #define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
74 static const gchar *_action = " invalidly modified type "; \
75 gpointer _arg = (gpointer) (arg); const gchar *_tname = (type_name), *_fname = (func); \
77 g_error ("%s(%p)%s`%s'", _fname, _arg, _action, _tname); \
79 g_error ("%s()%s`%s'", _fname, _action, _tname); \
81 #define g_return_val_if_uninitialized(condition, init_function, return_value) G_STMT_START{ \
84 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
85 "%s: initialization assertion failed, use %s() prior to this function", \
86 G_STRLOC, G_STRINGIFY (init_function)); \
87 return (return_value); \
92 #define DEBUG_CODE(debug_type, code_block) G_STMT_START { \
93 if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) \
96 #else /* !G_ENABLE_DEBUG */
97 #define DEBUG_CODE(debug_type, code_block) /* code_block */
98 #endif /* G_ENABLE_DEBUG */
100 #define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
101 G_TYPE_FLAG_INSTANTIATABLE | \
102 G_TYPE_FLAG_DERIVABLE | \
103 G_TYPE_FLAG_DEEP_DERIVABLE)
104 #define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT)
105 #define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
106 sizeof (gpointer)), \
110 /* --- typedefs --- */
111 typedef struct _TypeNode TypeNode;
112 typedef struct _CommonData CommonData;
113 typedef struct _IFaceData IFaceData;
114 typedef struct _ClassData ClassData;
115 typedef struct _InstanceData InstanceData;
116 typedef union _TypeData TypeData;
117 typedef struct _IFaceEntry IFaceEntry;
118 typedef struct _IFaceHolder IFaceHolder;
121 /* --- prototypes --- */
122 static inline GTypeFundamentalInfo* type_node_fundamental_info_I (TypeNode *node);
123 static void type_add_flags_W (TypeNode *node,
125 static void type_data_make_W (TypeNode *node,
126 const GTypeInfo *info,
127 const GTypeValueTable *value_table);
128 static inline void type_data_ref_Wm (TypeNode *node);
129 static inline void type_data_unref_Wm (TypeNode *node,
131 static void type_data_last_unref_Wm (GType type,
133 static inline gpointer type_get_qdata_L (TypeNode *node,
135 static inline void type_set_qdata_W (TypeNode *node,
138 static IFaceHolder* type_iface_peek_holder_L (TypeNode *iface,
139 GType instance_type);
140 static gboolean type_node_is_a_L (TypeNode *node,
141 TypeNode *iface_node);
144 /* --- structures --- */
148 guint n_children : 12;
150 guint _prot_n_ifaces_prerequisites : 9;
151 guint is_classed : 1;
152 guint is_instantiatable : 1;
153 guint mutatable_check_cache : 1; /* combines some common path checks */
155 TypeData * volatile data;
159 IFaceEntry *iface_entries; /* for !iface types */
160 GType *prerequisistes;
162 GType supers[1]; /* flexible array */
164 #define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
165 #define MAX_N_SUPERS (255)
166 #define MAX_N_CHILDREN (4095)
167 #define MAX_N_IFACES (511)
168 #define MAX_N_PREREQUISITES (MAX_N_IFACES)
169 #define NODE_TYPE(node) (node->supers[0])
170 #define NODE_PARENT_TYPE(node) (node->supers[1])
171 #define NODE_FUNDAMENTAL_TYPE(node) (node->supers[node->n_supers])
172 #define NODE_NAME(node) (g_quark_to_string (node->qname))
173 #define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
174 #define CLASSED_NODE_N_IFACES(node) ((node)->_prot_n_ifaces_prerequisites)
175 #define CLASSED_NODE_IFACES_ENTRIES(node) ((node)->_prot.iface_entries)
176 #define IFACE_NODE_N_PREREQUISITES(node) ((node)->_prot_n_ifaces_prerequisites)
177 #define IFACE_NODE_PREREQUISITES(node) ((node)->_prot.prerequisistes)
178 #define iface_node_get_holders_L(node) ((IFaceHolder*) type_get_qdata_L ((node), static_quark_iface_holder))
179 #define iface_node_set_holders_W(node, holders) (type_set_qdata_W ((node), static_quark_iface_holder, (holders)))
180 #define iface_node_get_dependants_array_L(n) ((GType*) type_get_qdata_L ((n), static_quark_dependants_array))
181 #define iface_node_set_dependants_array_W(n,d) (type_set_qdata_W ((n), static_quark_dependants_array, (d)))
182 #define TYPE_ID_MASK ((GType) ((1 << G_TYPE_FUNDAMENTAL_SHIFT) - 1))
188 GInterfaceInfo *info;
195 GTypeInterface *vtable;
200 GTypeValueTable *value_table;
206 GBaseInitFunc vtable_init_base;
207 GBaseFinalizeFunc vtable_finalize_base;
213 GBaseInitFunc class_init_base;
214 GBaseFinalizeFunc class_finalize_base;
215 GClassInitFunc class_init;
216 GClassFinalizeFunc class_finalize;
217 gconstpointer class_data;
224 GBaseInitFunc class_init_base;
225 GBaseFinalizeFunc class_finalize_base;
226 GClassInitFunc class_init;
227 GClassFinalizeFunc class_finalize;
228 gconstpointer class_data;
230 guint16 instance_size;
232 GInstanceInitFunc instance_init;
233 GMemChunk *mem_chunk;
240 InstanceData instance;
244 GTypeClassCacheFunc cache_func;
248 /* --- variables --- */
249 static guint static_n_class_cache_funcs = 0;
250 static ClassCacheFunc *static_class_cache_funcs = NULL;
251 static GQuark static_quark_type_flags = 0;
252 static GQuark static_quark_iface_holder = 0;
253 static GQuark static_quark_dependants_array = 0;
254 GTypeDebugFlags _g_type_debug_flags = 0;
257 /* --- type nodes --- */
258 static GHashTable *static_type_nodes_ht = NULL;
259 static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { 0, };
260 static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
262 static inline TypeNode*
263 lookup_type_node_I (register GType utype)
265 if (utype > G_TYPE_FUNDAMENTAL_MAX)
266 return (TypeNode*) (utype & ~TYPE_ID_MASK);
268 return static_fundamental_type_nodes[utype >> G_TYPE_FUNDAMENTAL_SHIFT];
272 type_node_any_new_W (TypeNode *pnode,
276 GTypeFundamentalFlags type_flags)
281 guint i, node_size = 0;
283 n_supers = pnode ? pnode->n_supers + 1 : 0;
286 node_size += SIZEOF_FUNDAMENTAL_INFO; /* fundamental type info */
287 node_size += SIZEOF_BASE_TYPE_NODE (); /* TypeNode structure */
288 node_size += (sizeof (GType) * (1 + n_supers + 1)); /* self + ancestors + (0) for ->supers[] */
289 node = g_malloc0 (node_size);
290 if (!pnode) /* offset fundamental types */
292 node = G_STRUCT_MEMBER_P (node, SIZEOF_FUNDAMENTAL_INFO);
293 static_fundamental_type_nodes[ftype >> G_TYPE_FUNDAMENTAL_SHIFT] = node;
299 g_assert ((type & TYPE_ID_MASK) == 0);
301 node->n_supers = n_supers;
304 node->supers[0] = type;
307 node->is_classed = (type_flags & G_TYPE_FLAG_CLASSED) != 0;
308 node->is_instantiatable = (type_flags & G_TYPE_FLAG_INSTANTIATABLE) != 0;
310 if (NODE_IS_IFACE (node))
312 IFACE_NODE_N_PREREQUISITES (node) = 0;
313 IFACE_NODE_PREREQUISITES (node) = NULL;
317 CLASSED_NODE_N_IFACES (node) = 0;
318 CLASSED_NODE_IFACES_ENTRIES (node) = NULL;
323 node->supers[0] = type;
324 memcpy (node->supers + 1, pnode->supers, sizeof (GType) * (1 + pnode->n_supers + 1));
326 node->is_classed = pnode->is_classed;
327 node->is_instantiatable = pnode->is_instantiatable;
329 if (NODE_IS_IFACE (node))
331 IFACE_NODE_N_PREREQUISITES (node) = 0;
332 IFACE_NODE_PREREQUISITES (node) = NULL;
338 CLASSED_NODE_N_IFACES (node) = CLASSED_NODE_N_IFACES (pnode);
339 CLASSED_NODE_IFACES_ENTRIES (node) = g_memdup (CLASSED_NODE_IFACES_ENTRIES (pnode),
340 sizeof (CLASSED_NODE_IFACES_ENTRIES (pnode)[0]) *
341 CLASSED_NODE_N_IFACES (node));
342 for (j = 0; j < CLASSED_NODE_N_IFACES (node); j++)
343 CLASSED_NODE_IFACES_ENTRIES (node)[j].vtable = NULL;
346 i = pnode->n_children++;
347 pnode->children = g_renew (GType, pnode->children, pnode->n_children);
348 pnode->children[i] = type;
351 node->plugin = plugin;
352 node->n_children = 0;
353 node->children = NULL;
355 node->qname = g_quark_from_string (name);
356 node->global_gdata = NULL;
358 g_hash_table_insert (static_type_nodes_ht,
359 GUINT_TO_POINTER (node->qname),
364 static inline GTypeFundamentalInfo*
365 type_node_fundamental_info_I (TypeNode *node)
367 GType ftype = NODE_FUNDAMENTAL_TYPE (node);
369 if (ftype != NODE_TYPE (node))
370 node = lookup_type_node_I (ftype);
372 return node ? G_STRUCT_MEMBER_P (node, -SIZEOF_FUNDAMENTAL_INFO) : NULL;
376 type_node_fundamental_new_W (GType ftype,
378 GTypeFundamentalFlags type_flags)
380 GTypeFundamentalInfo *finfo;
383 g_assert ((ftype & TYPE_ID_MASK) == 0);
384 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX);
386 if (ftype >> G_TYPE_FUNDAMENTAL_SHIFT == static_fundamental_next)
387 static_fundamental_next++;
389 type_flags &= TYPE_FUNDAMENTAL_FLAG_MASK;
391 node = type_node_any_new_W (NULL, ftype, name, NULL, type_flags);
393 finfo = type_node_fundamental_info_I (node);
394 finfo->type_flags = type_flags;
400 type_node_new_W (TypeNode *pnode,
406 g_assert (pnode->n_supers < MAX_N_SUPERS);
407 g_assert (pnode->n_children < MAX_N_CHILDREN);
409 return type_node_any_new_W (pnode, NODE_FUNDAMENTAL_TYPE (pnode), name, plugin, 0);
412 static inline IFaceEntry*
413 type_lookup_iface_entry_L (TypeNode *node,
414 TypeNode *iface_node)
416 if (NODE_IS_IFACE (iface_node) && CLASSED_NODE_N_IFACES (node))
418 IFaceEntry *ifaces = CLASSED_NODE_IFACES_ENTRIES (node) - 1;
419 guint n_ifaces = CLASSED_NODE_N_IFACES (node);
420 GType iface_type = NODE_TYPE (iface_node);
427 i = (n_ifaces + 1) >> 1;
429 if (iface_type == check->iface_type)
431 else if (iface_type > check->iface_type)
436 else /* if (iface_type < check->iface_type) */
445 static inline gboolean
446 type_lookup_prerequisite_L (TypeNode *iface,
447 GType prerequisite_type)
449 if (NODE_IS_IFACE (iface) && IFACE_NODE_N_PREREQUISITES (iface))
451 GType *prerequisites = IFACE_NODE_PREREQUISITES (iface) - 1;
452 guint n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
459 i = (n_prerequisites + 1) >> 1;
460 check = prerequisites + i;
461 if (prerequisite_type == *check)
463 else if (prerequisite_type > *check)
465 n_prerequisites -= i;
466 prerequisites = check;
468 else /* if (prerequisite_type < *check) */
469 n_prerequisites = i - 1;
471 while (n_prerequisites);
477 type_descriptive_name_I (GType type)
481 TypeNode *node = lookup_type_node_I (type);
483 return node ? NODE_NAME (node) : "<unknown>";
490 /* --- type consistency checks --- */
492 check_plugin_U (GTypePlugin *plugin,
493 gboolean need_complete_type_info,
494 gboolean need_complete_interface_info,
495 const gchar *type_name)
497 /* G_IS_TYPE_PLUGIN() and G_TYPE_PLUGIN_GET_CLASS() are external calls: _U
501 g_warning ("plugin handle for type `%s' is NULL",
505 if (!G_IS_TYPE_PLUGIN (plugin))
507 g_warning ("plugin pointer (%p) for type `%s' is invalid",
511 if (need_complete_type_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_type_info)
513 g_warning ("plugin for type `%s' has no complete_type_info() implementation",
517 if (need_complete_interface_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_interface_info)
519 g_warning ("plugin for type `%s' has no complete_interface_info() implementation",
527 check_type_name_I (const gchar *type_name)
529 static const gchar *extra_chars = "-_+";
530 const gchar *p = type_name;
533 if (!type_name[0] || !type_name[1] || !type_name[2])
535 g_warning ("type name `%s' is too short", type_name);
538 /* check the first letter */
539 name_valid = (p[0] >= 'A' && p[0] <= 'Z') || (p[0] >= 'a' && p[0] <= 'z') || p[0] == '_';
540 for (p = type_name + 1; *p; p++)
541 name_valid &= ((p[0] >= 'A' && p[0] <= 'Z') ||
542 (p[0] >= 'a' && p[0] <= 'z') ||
543 (p[0] >= '0' && p[0] <= '9') ||
544 strchr (extra_chars, p[0]));
547 g_warning ("type name `%s' contains invalid characters", type_name);
550 if (g_type_from_name (type_name))
552 g_warning ("cannot register existing type `%s'", type_name);
560 check_derivation_I (GType parent_type,
561 const gchar *type_name)
564 GTypeFundamentalInfo* finfo;
566 pnode = lookup_type_node_I (parent_type);
569 g_warning ("cannot derive type `%s' from invalid parent type `%s'",
571 type_descriptive_name_I (parent_type));
574 finfo = type_node_fundamental_info_I (pnode);
575 /* ensure flat derivability */
576 if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
578 g_warning ("cannot derive `%s' from non-derivable parent type `%s'",
583 /* ensure deep derivability */
584 if (parent_type != NODE_FUNDAMENTAL_TYPE (pnode) &&
585 !(finfo->type_flags & G_TYPE_FLAG_DEEP_DERIVABLE))
587 g_warning ("cannot derive `%s' from non-fundamental parent type `%s'",
597 check_collect_format_I (const gchar *collect_format)
599 const gchar *p = collect_format;
600 gchar valid_format[] = { G_VALUE_COLLECT_INT, G_VALUE_COLLECT_LONG,
601 G_VALUE_COLLECT_INT64, G_VALUE_COLLECT_DOUBLE,
602 G_VALUE_COLLECT_POINTER, 0 };
605 if (!strchr (valid_format, *p++))
607 return p - collect_format <= G_VALUE_COLLECT_FORMAT_MAX_LENGTH;
611 check_value_table_I (const gchar *type_name,
612 const GTypeValueTable *value_table)
616 else if (value_table->value_init == NULL)
618 if (value_table->value_free || value_table->value_copy ||
619 value_table->value_peek_pointer ||
620 value_table->collect_format || value_table->collect_value ||
621 value_table->lcopy_format || value_table->lcopy_value)
622 g_warning ("cannot handle uninitializable values of type `%s'",
626 else /* value_table->value_init != NULL */
628 if (!value_table->value_free)
631 * g_warning ("missing `value_free()' for type `%s'", type_name);
635 if (!value_table->value_copy)
637 g_warning ("missing `value_copy()' for type `%s'", type_name);
640 if ((value_table->collect_format || value_table->collect_value) &&
641 (!value_table->collect_format || !value_table->collect_value))
643 g_warning ("one of `collect_format' and `collect_value()' is unspecified for type `%s'",
647 if (value_table->collect_format && !check_collect_format_I (value_table->collect_format))
649 g_warning ("the `%s' specification for type `%s' is too long or invalid",
654 if ((value_table->lcopy_format || value_table->lcopy_value) &&
655 (!value_table->lcopy_format || !value_table->lcopy_value))
657 g_warning ("one of `lcopy_format' and `lcopy_value()' is unspecified for type `%s'",
661 if (value_table->lcopy_format && !check_collect_format_I (value_table->lcopy_format))
663 g_warning ("the `%s' specification for type `%s' is too long or invalid",
673 check_type_info_I (TypeNode *pnode,
675 const gchar *type_name,
676 const GTypeInfo *info)
678 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (lookup_type_node_I (ftype));
679 gboolean is_interface = ftype == G_TYPE_INTERFACE;
681 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX && !(ftype & TYPE_ID_MASK));
683 /* check instance members */
684 if (!(finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
685 (info->instance_size || info->n_preallocs || info->instance_init))
688 g_warning ("cannot instantiate `%s', derived from non-instantiatable parent type `%s'",
692 g_warning ("cannot instantiate `%s' as non-instantiatable fundamental",
696 /* check class & interface members */
697 if (!(finfo->type_flags & G_TYPE_FLAG_CLASSED) &&
698 (info->class_init || info->class_finalize || info->class_data ||
699 (!is_interface && (info->class_size || info->base_init || info->base_finalize))))
702 g_warning ("cannot create class for `%s', derived from non-classed parent type `%s'",
706 g_warning ("cannot create class for `%s' as non-classed fundamental",
710 /* check interface size */
711 if (is_interface && info->class_size < sizeof (GTypeInterface))
713 g_warning ("specified interface size for type `%s' is smaller than `GTypeInterface' size",
717 /* check class size */
718 if (finfo->type_flags & G_TYPE_FLAG_CLASSED)
720 if (info->class_size < sizeof (GTypeClass))
722 g_warning ("specified class size for type `%s' is smaller than `GTypeClass' size",
726 if (pnode && info->class_size < pnode->data->class.class_size)
728 g_warning ("specified class size for type `%s' is smaller "
729 "than the parent type's `%s' class size",
735 /* check instance size */
736 if (finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE)
738 if (info->instance_size < sizeof (GTypeInstance))
740 g_warning ("specified instance size for type `%s' is smaller than `GTypeInstance' size",
744 if (pnode && info->instance_size < pnode->data->instance.instance_size)
746 g_warning ("specified instance size for type `%s' is smaller "
747 "than the parent type's `%s' instance size",
758 find_conforming_child_type_L (TypeNode *pnode,
761 TypeNode *node = NULL;
764 if (type_lookup_iface_entry_L (pnode, iface))
767 for (i = 0; i < pnode->n_children && !node; i++)
768 node = find_conforming_child_type_L (lookup_type_node_I (pnode->children[i]), iface);
774 check_add_interface_L (GType instance_type,
777 TypeNode *node = lookup_type_node_I (instance_type);
778 TypeNode *iface = lookup_type_node_I (iface_type);
781 GType *prerequisites;
785 if (!node || !node->is_instantiatable)
787 g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
788 type_descriptive_name_I (instance_type));
791 if (!iface || !NODE_IS_IFACE (iface))
793 g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
794 type_descriptive_name_I (iface_type),
798 tnode = lookup_type_node_I (NODE_PARENT_TYPE (iface));
799 if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry_L (node, tnode))
801 /* 2001/7/31:timj: erk, i guess this warning is junk as interface derivation is flat */
802 g_warning ("cannot add sub-interface `%s' to type `%s' which does not conform to super-interface `%s'",
808 /* allow overriding of interface type introduced for parent type */
809 entry = type_lookup_iface_entry_L (node, iface);
810 if (entry && entry->vtable == NULL && !type_iface_peek_holder_L (iface, NODE_TYPE (node)))
812 /* ok, we do conform to this interface already, but the interface vtable was not
813 * yet intialized, and we just conform to the interface because it got added to
814 * one of our parents. so we allow overriding of holder info here.
818 /* check whether one of our children already conforms (or whether the interface
819 * got added to this node already)
821 tnode = find_conforming_child_type_L (node, iface); /* tnode is_a node */
824 g_warning ("cannot add interface type `%s' to type `%s', since type `%s' already conforms to interface",
830 prerequisites = IFACE_NODE_PREREQUISITES (iface);
831 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
833 tnode = lookup_type_node_I (prerequisites[i]);
834 if (!type_node_is_a_L (node, tnode))
836 g_warning ("cannot add interface type `%s' to type `%s' which does not conform to prerequisite `%s'",
847 check_interface_info_I (TypeNode *iface,
849 const GInterfaceInfo *info)
851 if ((info->interface_finalize || info->interface_data) && !info->interface_init)
853 g_warning ("interface type `%s' for type `%s' comes without initializer",
855 type_descriptive_name_I (instance_type));
862 /* --- type info (type node data) --- */
864 type_data_make_W (TypeNode *node,
865 const GTypeInfo *info,
866 const GTypeValueTable *value_table)
869 GTypeValueTable *vtable = NULL;
870 guint vtable_size = 0;
872 g_assert (node->data == NULL && info != NULL);
876 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
879 vtable = pnode->data->common.value_table;
882 static const GTypeValueTable zero_vtable = { NULL, };
884 value_table = &zero_vtable;
889 /* need to setup vtable_size since we have to allocate it with data in one chunk */
890 vtable_size = sizeof (GTypeValueTable);
891 if (value_table->collect_format)
892 vtable_size += strlen (value_table->collect_format);
893 if (value_table->lcopy_format)
894 vtable_size += strlen (value_table->lcopy_format);
898 if (node->is_instantiatable) /* carefull, is_instantiatable is also is_classed */
900 data = g_malloc0 (sizeof (InstanceData) + vtable_size);
902 vtable = G_STRUCT_MEMBER_P (data, sizeof (InstanceData));
903 data->instance.class_size = info->class_size;
904 data->instance.class_init_base = info->base_init;
905 data->instance.class_finalize_base = info->base_finalize;
906 data->instance.class_init = info->class_init;
907 data->instance.class_finalize = info->class_finalize;
908 data->instance.class_data = info->class_data;
909 data->instance.class = NULL;
910 data->instance.instance_size = info->instance_size;
911 #ifdef DISABLE_MEM_POOLS
912 data->instance.n_preallocs = 0;
913 #else /* !DISABLE_MEM_POOLS */
914 data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
915 #endif /* !DISABLE_MEM_POOLS */
916 data->instance.instance_init = info->instance_init;
917 data->instance.mem_chunk = NULL;
919 else if (node->is_classed) /* only classed */
921 data = g_malloc0 (sizeof (ClassData) + vtable_size);
923 vtable = G_STRUCT_MEMBER_P (data, sizeof (ClassData));
924 data->class.class_size = info->class_size;
925 data->class.class_init_base = info->base_init;
926 data->class.class_finalize_base = info->base_finalize;
927 data->class.class_init = info->class_init;
928 data->class.class_finalize = info->class_finalize;
929 data->class.class_data = info->class_data;
930 data->class.class = NULL;
932 else if (NODE_IS_IFACE (node))
934 data = g_malloc0 (sizeof (IFaceData) + vtable_size);
936 vtable = G_STRUCT_MEMBER_P (data, sizeof (IFaceData));
937 data->iface.vtable_size = info->class_size;
938 data->iface.vtable_init_base = info->base_init;
939 data->iface.vtable_finalize_base = info->base_finalize;
943 data = g_malloc0 (sizeof (CommonData) + vtable_size);
945 vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
949 node->data->common.ref_count = 1;
955 /* we allocate the vtable and its strings together with the type data, so
956 * children can take over their parent's vtable pointer, and we don't
957 * need to worry freeing it or not when the child data is destroyed
959 *vtable = *value_table;
960 p = G_STRUCT_MEMBER_P (vtable, sizeof (*vtable));
962 vtable->collect_format = p;
963 if (value_table->collect_format)
965 strcat (p, value_table->collect_format);
966 p += strlen (value_table->collect_format);
970 vtable->lcopy_format = p;
971 if (value_table->lcopy_format)
972 strcat (p, value_table->lcopy_format);
974 node->data->common.value_table = vtable;
975 node->mutatable_check_cache = (node->data->common.value_table->value_init != NULL &&
976 !((G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_ABSTRACT) &
977 GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))));
979 g_assert (node->data->common.value_table != NULL); /* paranoid */
983 type_data_ref_Wm (TypeNode *node)
987 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
989 GTypeValueTable tmp_value_table;
991 g_assert (node->plugin != NULL);
995 type_data_ref_Wm (pnode);
997 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1000 memset (&tmp_info, 0, sizeof (tmp_info));
1001 memset (&tmp_value_table, 0, sizeof (tmp_value_table));
1003 G_WRITE_UNLOCK (&type_rw_lock);
1004 g_type_plugin_use (node->plugin);
1005 g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
1006 G_WRITE_LOCK (&type_rw_lock);
1008 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1010 check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (node), NODE_NAME (node), &tmp_info);
1011 type_data_make_W (node, &tmp_info,
1012 check_value_table_I (NODE_NAME (node),
1013 &tmp_value_table) ? &tmp_value_table : NULL);
1017 g_assert (node->data->common.ref_count > 0);
1019 node->data->common.ref_count += 1;
1024 type_data_unref_Wm (TypeNode *node,
1027 g_assert (node->data && node->data->common.ref_count);
1029 if (node->data->common.ref_count > 1)
1030 node->data->common.ref_count -= 1;
1035 g_warning ("static type `%s' unreferenced too often",
1040 type_data_last_unref_Wm (NODE_TYPE (node), uncached);
1045 type_node_add_iface_entry_W (TypeNode *node,
1048 IFaceEntry *entries;
1051 g_assert (node->is_instantiatable && CLASSED_NODE_N_IFACES (node) < MAX_N_IFACES);
1053 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1054 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1055 if (entries[i].iface_type == iface_type)
1057 /* this can (should) only happen if our parent type already conformed
1058 * to iface_type and node got it's own holder info. here, our
1059 * children should already have entries with NULL vtables, so
1060 * we're actually done.
1062 g_assert (entries[i].vtable == NULL);
1065 else if (entries[i].iface_type > iface_type)
1067 CLASSED_NODE_N_IFACES (node) += 1;
1068 CLASSED_NODE_IFACES_ENTRIES (node) = g_renew (IFaceEntry,
1069 CLASSED_NODE_IFACES_ENTRIES (node),
1070 CLASSED_NODE_N_IFACES (node));
1071 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1072 g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (CLASSED_NODE_N_IFACES (node) - i - 1));
1073 entries[i].iface_type = iface_type;
1074 entries[i].vtable = NULL;
1076 for (i = 0; i < node->n_children; i++)
1077 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), iface_type);
1081 type_add_interface_W (TypeNode *node,
1083 const GInterfaceInfo *info,
1084 GTypePlugin *plugin)
1086 IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
1088 /* we must not call any functions of GInterfaceInfo from within here, since
1089 * we got most probably called from _within_ a type registration function
1091 g_assert (node->is_instantiatable && NODE_IS_IFACE (iface) && ((info && !plugin) || (!info && plugin)));
1093 iholder->next = iface_node_get_holders_L (iface);
1094 iface_node_set_holders_W (iface, iholder);
1095 iholder->instance_type = NODE_TYPE (node);
1096 iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
1097 iholder->plugin = plugin;
1099 type_node_add_iface_entry_W (node, NODE_TYPE (iface));
1103 type_iface_add_prerequisite_W (TypeNode *iface,
1104 TypeNode *prerequisite_node)
1106 GType prerequisite_type = NODE_TYPE (prerequisite_node);
1107 GType *prerequisites, *dependants;
1108 guint n_dependants, i;
1110 g_assert (NODE_IS_IFACE (iface) &&
1111 IFACE_NODE_N_PREREQUISITES (iface) < MAX_N_PREREQUISITES &&
1112 (prerequisite_node->is_instantiatable || NODE_IS_IFACE (prerequisite_node)));
1114 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1115 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1116 if (prerequisites[i] == prerequisite_type)
1117 return; /* we already have that prerequisiste */
1118 else if (prerequisites[i] > prerequisite_type)
1120 IFACE_NODE_N_PREREQUISITES (iface) += 1;
1121 IFACE_NODE_PREREQUISITES (iface) = g_renew (GType,
1122 IFACE_NODE_PREREQUISITES (iface),
1123 IFACE_NODE_N_PREREQUISITES (iface));
1124 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1125 g_memmove (prerequisites + i + 1, prerequisites + i,
1126 sizeof (prerequisites[0]) * (IFACE_NODE_N_PREREQUISITES (iface) - i - 1));
1127 prerequisites[i] = prerequisite_type;
1129 /* we want to get notified when prerequisites get added to prerequisite_node */
1130 if (NODE_IS_IFACE (prerequisite_node))
1132 dependants = iface_node_get_dependants_array_L (prerequisite_node);
1133 n_dependants = dependants ? dependants[0] : 0;
1135 dependants = g_renew (GType, dependants, n_dependants + 1);
1136 dependants[n_dependants] = NODE_TYPE (iface);
1137 dependants[0] = n_dependants;
1138 iface_node_set_dependants_array_W (prerequisite_node, dependants);
1141 /* we need to notify all dependants */
1142 dependants = iface_node_get_dependants_array_L (iface);
1143 n_dependants = dependants ? dependants[0] : 0;
1144 for (i = 1; i <= n_dependants; i++)
1145 type_iface_add_prerequisite_W (lookup_type_node_I (dependants[i]), prerequisite_node);
1149 g_type_interface_add_prerequisite (GType interface_type,
1150 GType prerequisite_type)
1152 TypeNode *iface, *prerequisite_node;
1153 IFaceHolder *holders;
1155 g_return_if_fail (G_TYPE_IS_INTERFACE (interface_type)); /* G_TYPE_IS_INTERFACE() is an external call: _U */
1156 g_return_if_fail (!g_type_is_a (interface_type, prerequisite_type));
1157 g_return_if_fail (!g_type_is_a (prerequisite_type, interface_type));
1159 iface = lookup_type_node_I (interface_type);
1160 prerequisite_node = lookup_type_node_I (prerequisite_type);
1161 if (!iface || !prerequisite_node || !NODE_IS_IFACE (iface))
1163 g_warning ("interface type `%s' or prerequisite type `%s' invalid",
1164 type_descriptive_name_I (interface_type),
1165 type_descriptive_name_I (prerequisite_type));
1168 G_WRITE_LOCK (&type_rw_lock);
1169 holders = iface_node_get_holders_L (iface);
1172 G_WRITE_UNLOCK (&type_rw_lock);
1173 g_warning ("unable to add prerequisite `%s' to interface `%s' which is already in use for `%s'",
1174 type_descriptive_name_I (prerequisite_type),
1175 type_descriptive_name_I (interface_type),
1176 type_descriptive_name_I (holders->instance_type));
1179 if (prerequisite_node->is_instantiatable)
1183 /* can have at most one publically installable instantiatable prerequisite */
1184 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1186 TypeNode *prnode = lookup_type_node_I (IFACE_NODE_PREREQUISITES (iface)[i]);
1188 if (prnode->is_instantiatable)
1190 G_WRITE_UNLOCK (&type_rw_lock);
1191 g_warning ("adding prerequisite `%s' to interface `%s' conflicts with existing prerequisite `%s'",
1192 type_descriptive_name_I (prerequisite_type),
1193 type_descriptive_name_I (interface_type),
1194 type_descriptive_name_I (NODE_TYPE (prnode)));
1199 for (i = 0; i < prerequisite_node->n_supers + 1; i++)
1200 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisite_node->supers[i]));
1201 G_WRITE_UNLOCK (&type_rw_lock);
1203 else if (NODE_IS_IFACE (prerequisite_node))
1205 GType *prerequisites;
1208 prerequisites = IFACE_NODE_PREREQUISITES (prerequisite_node);
1209 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (prerequisite_node); i++)
1210 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisites[i]));
1211 type_iface_add_prerequisite_W (iface, prerequisite_node);
1212 G_WRITE_UNLOCK (&type_rw_lock);
1216 G_WRITE_UNLOCK (&type_rw_lock);
1217 g_warning ("prerequisite `%s' for interface `%s' is neither instantiatable nor interface",
1218 type_descriptive_name_I (prerequisite_type),
1219 type_descriptive_name_I (interface_type));
1224 * g_type_interface_prerequisites:
1225 * @interface_type: an interface type
1226 * @n_prerequisites: location to return the number of prerequisites, or %NULL
1228 * Returns the prerequisites of an interfaces type.
1230 * Return value: a newly-allocated zero-terminated array of #GType containing
1231 * the prerequisites of @interface_type
1233 GType* /* free result */
1234 g_type_interface_prerequisites (GType interface_type,
1235 guint *n_prerequisites)
1239 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
1241 iface = lookup_type_node_I (interface_type);
1244 GType *prerequisites;
1247 G_READ_LOCK (&type_rw_lock);
1248 prerequisites = g_new (GType, IFACE_NODE_N_PREREQUISITES (iface) + 1);
1249 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1250 prerequisites[i] = IFACE_NODE_PREREQUISITES (iface)[i];
1251 prerequisites[i] = 0;
1253 if (n_prerequisites)
1254 *n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
1255 G_READ_UNLOCK (&type_rw_lock);
1257 return prerequisites;
1261 if (n_prerequisites)
1262 *n_prerequisites = 0;
1270 type_iface_peek_holder_L (TypeNode *iface,
1271 GType instance_type)
1273 IFaceHolder *iholder;
1275 g_assert (NODE_IS_IFACE (iface));
1277 iholder = iface_node_get_holders_L (iface);
1278 while (iholder && iholder->instance_type != instance_type)
1279 iholder = iholder->next;
1284 type_iface_retrieve_holder_info_Wm (TypeNode *iface,
1285 GType instance_type,
1288 IFaceHolder *iholder = type_iface_peek_holder_L (iface, instance_type);
1290 if (iholder && !iholder->info && need_info)
1292 GInterfaceInfo tmp_info;
1294 g_assert (iholder->plugin != NULL);
1296 type_data_ref_Wm (iface);
1298 INVALID_RECURSION ("g_type_plugin_*", iface->plugin, NODE_NAME (iface));
1300 memset (&tmp_info, 0, sizeof (tmp_info));
1302 G_WRITE_UNLOCK (&type_rw_lock);
1303 g_type_plugin_use (iholder->plugin);
1304 g_type_plugin_complete_interface_info (iholder->plugin, instance_type, NODE_TYPE (iface), &tmp_info);
1305 G_WRITE_LOCK (&type_rw_lock);
1307 INVALID_RECURSION ("g_type_plugin_*", iholder->plugin, NODE_NAME (iface));
1309 check_interface_info_I (iface, instance_type, &tmp_info);
1310 iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
1313 return iholder; /* we don't modify write lock upon returning NULL */
1317 type_iface_blow_holder_info_Wm (TypeNode *iface,
1318 GType instance_type)
1320 IFaceHolder *iholder = iface_node_get_holders_L (iface);
1322 g_assert (NODE_IS_IFACE (iface));
1324 while (iholder->instance_type != instance_type)
1325 iholder = iholder->next;
1327 if (iholder->info && iholder->plugin)
1329 g_free (iholder->info);
1330 iholder->info = NULL;
1332 G_WRITE_UNLOCK (&type_rw_lock);
1333 g_type_plugin_unuse (iholder->plugin);
1334 G_WRITE_LOCK (&type_rw_lock);
1336 type_data_unref_Wm (iface, FALSE);
1341 /* --- type structure creation/destruction --- */
1343 g_type_create_instance (GType type)
1346 GTypeInstance *instance;
1350 node = lookup_type_node_I (type);
1351 if (!node || !node->is_instantiatable)
1353 g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
1354 type_descriptive_name_I (type));
1357 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1358 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
1360 g_warning ("cannot create instance of abstract (non-instantiatable) type `%s'",
1361 type_descriptive_name_I (type));
1365 class = g_type_class_ref (type);
1367 if (node->data->instance.n_preallocs)
1369 G_WRITE_LOCK (&type_rw_lock);
1370 if (!node->data->instance.mem_chunk)
1371 node->data->instance.mem_chunk = g_mem_chunk_new (NODE_NAME (node),
1372 node->data->instance.instance_size,
1373 (node->data->instance.instance_size *
1374 node->data->instance.n_preallocs),
1376 instance = g_chunk_new0 (GTypeInstance, node->data->instance.mem_chunk);
1377 G_WRITE_UNLOCK (&type_rw_lock);
1380 instance = g_malloc0 (node->data->instance.instance_size); /* fine without read lock */
1381 for (i = node->n_supers; i > 0; i--)
1385 pnode = lookup_type_node_I (node->supers[i]);
1386 if (pnode->data->instance.instance_init)
1388 instance->g_class = pnode->data->instance.class;
1389 pnode->data->instance.instance_init (instance, class);
1392 instance->g_class = class;
1394 if (node->data->instance.instance_init)
1395 node->data->instance.instance_init (instance, class);
1401 g_type_free_instance (GTypeInstance *instance)
1406 g_return_if_fail (instance != NULL && instance->g_class != NULL);
1408 class = instance->g_class;
1409 node = lookup_type_node_I (class->g_type);
1410 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != (gpointer) class)
1412 g_warning ("cannot free instance of invalid (non-instantiatable) type `%s'",
1413 type_descriptive_name_I (class->g_type));
1416 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1417 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (NODE_TYPE (node)))
1419 g_warning ("cannot free instance of abstract (non-instantiatable) type `%s'",
1424 instance->g_class = NULL;
1425 #ifdef G_ENABLE_DEBUG
1426 memset (instance, 0xaa, node->data->instance.instance_size); /* debugging hack */
1428 if (node->data->instance.n_preallocs)
1430 G_WRITE_LOCK (&type_rw_lock);
1431 g_chunk_free (instance, node->data->instance.mem_chunk);
1432 G_WRITE_UNLOCK (&type_rw_lock);
1437 g_type_class_unref (class);
1441 type_iface_vtable_init_Wm (TypeNode *iface,
1444 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1445 IFaceHolder *iholder;
1446 GTypeInterface *vtable = NULL;
1449 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1450 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), TRUE);
1452 return FALSE; /* we don't modify write lock upon FALSE */
1454 g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
1456 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1457 if (pnode) /* want to copy over parent iface contents */
1459 IFaceEntry *pentry = type_lookup_iface_entry_L (pnode, iface);
1462 vtable = g_memdup (pentry->vtable, iface->data->iface.vtable_size);
1465 vtable = g_malloc0 (iface->data->iface.vtable_size);
1466 entry->vtable = vtable;
1467 vtable->g_type = NODE_TYPE (iface);
1468 vtable->g_instance_type = NODE_TYPE (node);
1470 if (iface->data->iface.vtable_init_base || iholder->info->interface_init)
1472 G_WRITE_UNLOCK (&type_rw_lock);
1473 if (iface->data->iface.vtable_init_base)
1474 iface->data->iface.vtable_init_base (vtable);
1475 if (iholder->info->interface_init)
1476 iholder->info->interface_init (vtable, iholder->info->interface_data);
1477 G_WRITE_LOCK (&type_rw_lock);
1479 return TRUE; /* write lock modified */
1483 type_iface_vtable_finalize_Wm (TypeNode *iface,
1485 GTypeInterface *vtable)
1487 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1488 IFaceHolder *iholder;
1490 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1491 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), FALSE);
1493 return FALSE; /* we don't modify write lock upon FALSE */
1495 g_assert (entry && entry->vtable == vtable && iholder->info);
1497 entry->vtable = NULL;
1498 if (iholder->info->interface_finalize || iface->data->iface.vtable_finalize_base)
1500 G_WRITE_UNLOCK (&type_rw_lock);
1501 if (iholder->info->interface_finalize)
1502 iholder->info->interface_finalize (vtable, iholder->info->interface_data);
1503 if (iface->data->iface.vtable_finalize_base)
1504 iface->data->iface.vtable_finalize_base (vtable);
1505 G_WRITE_LOCK (&type_rw_lock);
1508 vtable->g_instance_type = 0;
1511 type_iface_blow_holder_info_Wm (iface, NODE_TYPE (node));
1513 return TRUE; /* write lock modified */
1517 type_class_init_Wm (TypeNode *node,
1520 GSList *slist, *init_slist = NULL;
1523 TypeNode *bnode, *pnode;
1526 g_assert (node->is_classed && node->data &&
1527 node->data->class.class_size &&
1528 !node->data->class.class);
1530 class = g_malloc0 (node->data->class.class_size);
1531 node->data->class.class = class;
1535 TypeNode *pnode = lookup_type_node_I (pclass->g_type);
1537 memcpy (class, pclass, pnode->data->class.class_size);
1539 class->g_type = NODE_TYPE (node);
1541 G_WRITE_UNLOCK (&type_rw_lock);
1543 /* stack all base class initialization functions, so we
1544 * call them in ascending order.
1546 for (bnode = node; bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1547 if (bnode->data->class.class_init_base)
1548 init_slist = g_slist_prepend (init_slist, (gpointer) bnode->data->class.class_init_base);
1549 for (slist = init_slist; slist; slist = slist->next)
1551 GBaseInitFunc class_init_base = (GBaseInitFunc) slist->data;
1553 class_init_base (class);
1555 g_slist_free (init_slist);
1557 if (node->data->class.class_init)
1558 node->data->class.class_init (class, (gpointer) node->data->class.class_data);
1560 G_WRITE_LOCK (&type_rw_lock);
1562 /* ok, we got the class done, now initialize all interfaces, either
1563 * from parent, or through our holder info
1565 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1566 entry = CLASSED_NODE_IFACES_ENTRIES (node) + 0;
1569 g_assert (entry->vtable == NULL);
1571 if (!type_iface_vtable_init_Wm (lookup_type_node_I (entry->iface_type), node))
1575 /* type_iface_vtable_init_Wm() doesn't modify write lock upon FALSE,
1576 * need to get this interface from parent
1578 g_assert (pnode != NULL);
1580 for (j = 0; j < CLASSED_NODE_N_IFACES (pnode); j++)
1582 IFaceEntry *pentry = CLASSED_NODE_IFACES_ENTRIES (pnode) + j;
1584 if (pentry->iface_type == entry->iface_type)
1586 entry->vtable = pentry->vtable;
1590 g_assert (entry->vtable != NULL);
1593 /* refetch entry, IFACES_ENTRIES might be modified */
1594 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1595 if (!CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable)
1596 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1601 type_data_finalize_class_ifaces_Wm (TypeNode *node)
1606 g_assert (node->is_instantiatable && node->data && node->data->class.class && node->data->common.ref_count == 0);
1608 g_message ("finalizing interfaces for %sClass `%s'",
1609 type_descriptive_name_I (NODE_FUNDAMENTAL_TYPE (node)),
1610 type_descriptive_name_I (NODE_TYPE (node)));
1612 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1613 if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
1614 CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
1615 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1618 if (!type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
1620 /* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
1621 * iface vtable came from parent
1623 entry->vtable = NULL;
1626 /* refetch entry, IFACES_ENTRIES might be modified */
1627 for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1628 if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
1629 CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
1630 entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1635 type_data_finalize_class_U (TypeNode *node,
1638 GTypeClass *class = cdata->class;
1641 g_assert (cdata->class && cdata->common.ref_count == 0);
1643 if (cdata->class_finalize)
1644 cdata->class_finalize (class, (gpointer) cdata->class_data);
1646 /* call all base class destruction functions in descending order
1648 if (cdata->class_finalize_base)
1649 cdata->class_finalize_base (class);
1650 for (bnode = lookup_type_node_I (NODE_PARENT_TYPE (node)); bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1651 if (bnode->data->class.class_finalize_base)
1652 bnode->data->class.class_finalize_base (class);
1655 g_free (cdata->class);
1659 type_data_last_unref_Wm (GType type,
1662 TypeNode *node = lookup_type_node_I (type);
1664 g_return_if_fail (node != NULL && node->plugin != NULL);
1666 if (!node->data || node->data->common.ref_count == 0)
1668 g_warning ("cannot drop last reference to unreferenced type `%s'",
1669 type_descriptive_name_I (type));
1673 if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs)
1677 G_WRITE_UNLOCK (&type_rw_lock);
1678 G_READ_LOCK (&type_rw_lock);
1679 for (i = 0; i < static_n_class_cache_funcs; i++)
1681 GTypeClassCacheFunc cache_func = static_class_cache_funcs[i].cache_func;
1682 gpointer cache_data = static_class_cache_funcs[i].cache_data;
1683 gboolean need_break;
1685 G_READ_UNLOCK (&type_rw_lock);
1686 need_break = cache_func (cache_data, node->data->class.class);
1687 G_READ_LOCK (&type_rw_lock);
1688 if (!node->data || node->data->common.ref_count == 0)
1689 INVALID_RECURSION ("GType class cache function ", cache_func, NODE_NAME (node));
1693 G_READ_UNLOCK (&type_rw_lock);
1694 G_WRITE_LOCK (&type_rw_lock);
1697 if (node->data->common.ref_count > 1) /* may have been re-referenced meanwhile */
1698 node->data->common.ref_count -= 1;
1701 GType ptype = NODE_PARENT_TYPE (node);
1704 node->data->common.ref_count = 0;
1706 if (node->is_instantiatable && node->data->instance.mem_chunk)
1708 g_mem_chunk_destroy (node->data->instance.mem_chunk);
1709 node->data->instance.mem_chunk = NULL;
1713 if (node->is_classed && tdata->class.class)
1715 if (CLASSED_NODE_N_IFACES (node))
1716 type_data_finalize_class_ifaces_Wm (node);
1717 node->mutatable_check_cache = FALSE;
1719 G_WRITE_UNLOCK (&type_rw_lock);
1720 type_data_finalize_class_U (node, &tdata->class);
1721 G_WRITE_LOCK (&type_rw_lock);
1725 node->mutatable_check_cache = FALSE;
1729 /* freeing tdata->common.value_table and its contents is taking care of
1730 * by allocating it in one chunk with tdata
1735 type_data_unref_Wm (lookup_type_node_I (ptype), FALSE);
1736 G_WRITE_UNLOCK (&type_rw_lock);
1737 g_type_plugin_unuse (node->plugin);
1738 G_WRITE_LOCK (&type_rw_lock);
1743 g_type_add_class_cache_func (gpointer cache_data,
1744 GTypeClassCacheFunc cache_func)
1748 g_return_if_fail (cache_func != NULL);
1750 G_WRITE_LOCK (&type_rw_lock);
1751 i = static_n_class_cache_funcs++;
1752 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
1753 static_class_cache_funcs[i].cache_data = cache_data;
1754 static_class_cache_funcs[i].cache_func = cache_func;
1755 G_WRITE_UNLOCK (&type_rw_lock);
1759 g_type_remove_class_cache_func (gpointer cache_data,
1760 GTypeClassCacheFunc cache_func)
1762 gboolean found_it = FALSE;
1765 g_return_if_fail (cache_func != NULL);
1767 G_WRITE_LOCK (&type_rw_lock);
1768 for (i = 0; i < static_n_class_cache_funcs; i++)
1769 if (static_class_cache_funcs[i].cache_data == cache_data &&
1770 static_class_cache_funcs[i].cache_func == cache_func)
1772 static_n_class_cache_funcs--;
1773 g_memmove (static_class_cache_funcs + i,
1774 static_class_cache_funcs + i + 1,
1775 sizeof (static_class_cache_funcs[0]) * (static_n_class_cache_funcs - i));
1776 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
1780 G_WRITE_UNLOCK (&type_rw_lock);
1783 g_warning (G_STRLOC ": cannot remove unregistered class cache func %p with data %p",
1784 cache_func, cache_data);
1788 /* --- type registration --- */
1790 g_type_register_fundamental (GType type_id,
1791 const gchar *type_name,
1792 const GTypeInfo *info,
1793 const GTypeFundamentalInfo *finfo,
1796 GTypeFundamentalInfo *node_finfo;
1799 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1800 g_return_val_if_fail (type_id > 0, 0);
1801 g_return_val_if_fail (type_name != NULL, 0);
1802 g_return_val_if_fail (info != NULL, 0);
1803 g_return_val_if_fail (finfo != NULL, 0);
1805 if (!check_type_name_I (type_name))
1807 if ((type_id & TYPE_ID_MASK) ||
1808 type_id > G_TYPE_FUNDAMENTAL_MAX)
1810 g_warning ("attempt to register fundamental type `%s' with invalid type id (%lu)",
1815 if ((finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
1816 !(finfo->type_flags & G_TYPE_FLAG_CLASSED))
1818 g_warning ("cannot register instantiatable fundamental type `%s' as non-classed",
1822 if (lookup_type_node_I (type_id))
1824 g_warning ("cannot register existing fundamental type `%s' (as `%s')",
1825 type_descriptive_name_I (type_id),
1830 G_WRITE_LOCK (&type_rw_lock);
1831 node = type_node_fundamental_new_W (type_id, type_name, finfo->type_flags);
1832 node_finfo = type_node_fundamental_info_I (node);
1833 type_add_flags_W (node, flags);
1835 if (check_type_info_I (NULL, NODE_FUNDAMENTAL_TYPE (node), type_name, info))
1836 type_data_make_W (node, info,
1837 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
1838 G_WRITE_UNLOCK (&type_rw_lock);
1840 return NODE_TYPE (node);
1844 g_type_register_static (GType parent_type,
1845 const gchar *type_name,
1846 const GTypeInfo *info,
1849 TypeNode *pnode, *node;
1852 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1853 g_return_val_if_fail (parent_type > 0, 0);
1854 g_return_val_if_fail (type_name != NULL, 0);
1855 g_return_val_if_fail (info != NULL, 0);
1857 if (!check_type_name_I (type_name) ||
1858 !check_derivation_I (parent_type, type_name))
1860 if (info->class_finalize)
1862 g_warning ("class finalizer specified for static type `%s'",
1867 pnode = lookup_type_node_I (parent_type);
1868 G_WRITE_LOCK (&type_rw_lock);
1869 type_data_ref_Wm (pnode);
1870 if (check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (pnode), type_name, info))
1872 node = type_node_new_W (pnode, type_name, NULL);
1873 type_add_flags_W (node, flags);
1874 type = NODE_TYPE (node);
1875 type_data_make_W (node, info,
1876 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
1878 G_WRITE_UNLOCK (&type_rw_lock);
1884 g_type_register_dynamic (GType parent_type,
1885 const gchar *type_name,
1886 GTypePlugin *plugin,
1889 TypeNode *pnode, *node;
1892 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
1893 g_return_val_if_fail (parent_type > 0, 0);
1894 g_return_val_if_fail (type_name != NULL, 0);
1895 g_return_val_if_fail (plugin != NULL, 0);
1897 if (!check_type_name_I (type_name) ||
1898 !check_derivation_I (parent_type, type_name) ||
1899 !check_plugin_U (plugin, TRUE, FALSE, type_name))
1902 G_WRITE_LOCK (&type_rw_lock);
1903 pnode = lookup_type_node_I (parent_type);
1904 node = type_node_new_W (pnode, type_name, plugin);
1905 type_add_flags_W (node, flags);
1906 type = NODE_TYPE (node);
1907 G_WRITE_UNLOCK (&type_rw_lock);
1913 g_type_add_interface_static (GType instance_type,
1914 GType interface_type,
1915 const GInterfaceInfo *info)
1917 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
1918 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
1919 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
1921 G_WRITE_LOCK (&type_rw_lock);
1922 if (check_add_interface_L (instance_type, interface_type))
1924 TypeNode *node = lookup_type_node_I (instance_type);
1925 TypeNode *iface = lookup_type_node_I (interface_type);
1927 if (check_interface_info_I (iface, NODE_TYPE (node), info))
1929 type_add_interface_W (node, iface, info, NULL);
1930 /* if we have a class already, the interface vtable needs to
1931 * be initialized as well
1933 if (node->data && node->data->class.class)
1934 type_iface_vtable_init_Wm (iface, node);
1937 G_WRITE_UNLOCK (&type_rw_lock);
1941 g_type_add_interface_dynamic (GType instance_type,
1942 GType interface_type,
1943 GTypePlugin *plugin)
1947 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
1948 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
1949 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
1951 node = lookup_type_node_I (instance_type);
1952 if (!check_plugin_U (plugin, FALSE, TRUE, NODE_NAME (node)))
1955 G_WRITE_LOCK (&type_rw_lock);
1956 if (check_add_interface_L (instance_type, interface_type))
1958 TypeNode *iface = lookup_type_node_I (interface_type);
1960 type_add_interface_W (node, iface, NULL, plugin);
1961 /* if we have a class already, the interface vtable needs to
1962 * be initialized as well
1964 if (node->data && node->data->class.class)
1965 type_iface_vtable_init_Wm (iface, node);
1967 G_WRITE_UNLOCK (&type_rw_lock);
1971 /* --- public API functions --- */
1973 g_type_class_ref (GType type)
1977 /* optimize for common code path
1979 G_WRITE_LOCK (&type_rw_lock);
1980 node = lookup_type_node_I (type);
1981 if (node && node->is_classed && node->data &&
1982 node->data->class.class && node->data->common.ref_count > 0)
1984 type_data_ref_Wm (node);
1985 G_WRITE_UNLOCK (&type_rw_lock);
1987 return node->data->class.class;
1990 if (!node || !node->is_classed ||
1991 (node->data && node->data->common.ref_count < 1))
1993 G_WRITE_UNLOCK (&type_rw_lock);
1994 g_warning ("cannot retrieve class for invalid (unclassed) type `%s'",
1995 type_descriptive_name_I (type));
1999 type_data_ref_Wm (node);
2001 if (!node->data->class.class)
2003 GType ptype = NODE_PARENT_TYPE (node);
2004 GTypeClass *pclass = NULL;
2008 G_WRITE_UNLOCK (&type_rw_lock);
2009 pclass = g_type_class_ref (ptype);
2010 if (node->data->class.class)
2011 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
2012 G_WRITE_LOCK (&type_rw_lock);
2015 type_class_init_Wm (node, pclass);
2017 G_WRITE_UNLOCK (&type_rw_lock);
2019 return node->data->class.class;
2023 g_type_class_unref (gpointer g_class)
2026 GTypeClass *class = g_class;
2028 g_return_if_fail (g_class != NULL);
2030 node = lookup_type_node_I (class->g_type);
2031 G_WRITE_LOCK (&type_rw_lock);
2032 if (node && node->is_classed && node->data &&
2033 node->data->class.class == class && node->data->common.ref_count > 0)
2034 type_data_unref_Wm (node, FALSE);
2036 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2037 type_descriptive_name_I (class->g_type));
2038 G_WRITE_UNLOCK (&type_rw_lock);
2042 g_type_class_unref_uncached (gpointer g_class)
2045 GTypeClass *class = g_class;
2047 g_return_if_fail (g_class != NULL);
2049 G_WRITE_LOCK (&type_rw_lock);
2050 node = lookup_type_node_I (class->g_type);
2051 if (node && node->is_classed && node->data &&
2052 node->data->class.class == class && node->data->common.ref_count > 0)
2053 type_data_unref_Wm (node, TRUE);
2055 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2056 type_descriptive_name_I (class->g_type));
2057 G_WRITE_UNLOCK (&type_rw_lock);
2061 g_type_class_peek (GType type)
2066 node = lookup_type_node_I (type);
2067 G_READ_LOCK (&type_rw_lock);
2068 if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
2069 class = node->data->class.class;
2072 G_READ_UNLOCK (&type_rw_lock);
2078 g_type_class_peek_parent (gpointer g_class)
2081 gpointer class = NULL;
2083 g_return_val_if_fail (g_class != NULL, NULL);
2085 node = lookup_type_node_I (G_TYPE_FROM_CLASS (g_class));
2086 G_READ_LOCK (&type_rw_lock);
2087 if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
2089 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2090 class = node->data->class.class;
2092 else if (NODE_PARENT_TYPE (node))
2093 g_warning (G_STRLOC ": invalid class pointer `%p'", g_class);
2094 G_READ_UNLOCK (&type_rw_lock);
2100 g_type_interface_peek (gpointer instance_class,
2105 gpointer vtable = NULL;
2106 GTypeClass *class = instance_class;
2108 g_return_val_if_fail (instance_class != NULL, NULL);
2110 node = lookup_type_node_I (class->g_type);
2111 iface = lookup_type_node_I (iface_type);
2112 if (node && node->is_instantiatable && iface)
2116 G_READ_LOCK (&type_rw_lock);
2118 entry = type_lookup_iface_entry_L (node, iface);
2119 if (entry && entry->vtable) /* entry is relocatable */
2120 vtable = entry->vtable;
2122 G_READ_UNLOCK (&type_rw_lock);
2125 g_warning (G_STRLOC ": invalid class pointer `%p'", class);
2131 g_type_interface_peek_parent (gpointer g_iface)
2135 gpointer vtable = NULL;
2136 GTypeInterface *iface_class = g_iface;
2138 g_return_val_if_fail (g_iface != NULL, NULL);
2140 iface = lookup_type_node_I (iface_class->g_type);
2141 node = lookup_type_node_I (iface_class->g_instance_type);
2143 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2144 if (node && node->is_instantiatable && iface)
2148 G_READ_LOCK (&type_rw_lock);
2150 entry = type_lookup_iface_entry_L (node, iface);
2151 if (entry && entry->vtable) /* entry is relocatable */
2152 vtable = entry->vtable;
2154 G_READ_UNLOCK (&type_rw_lock);
2157 g_warning (G_STRLOC ": invalid interface pointer `%p'", g_iface);
2162 G_CONST_RETURN gchar*
2163 g_type_name (GType type)
2167 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, NULL);
2169 node = lookup_type_node_I (type);
2171 return node ? NODE_NAME (node) : NULL;
2175 g_type_qname (GType type)
2179 node = lookup_type_node_I (type);
2181 return node ? node->qname : 0;
2185 g_type_from_name (const gchar *name)
2190 g_return_val_if_fail (name != NULL, 0);
2192 quark = g_quark_try_string (name);
2195 G_READ_LOCK (&type_rw_lock);
2196 type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
2197 G_READ_UNLOCK (&type_rw_lock);
2204 g_type_parent (GType type)
2208 node = lookup_type_node_I (type);
2210 return node ? NODE_PARENT_TYPE (node) : 0;
2214 g_type_depth (GType type)
2218 node = lookup_type_node_I (type);
2220 return node ? node->n_supers + 1 : 0;
2224 g_type_next_base (GType type,
2230 node = lookup_type_node_I (type);
2233 TypeNode *base_node = lookup_type_node_I (base_type);
2235 if (base_node && base_node->n_supers < node->n_supers)
2237 guint n = node->n_supers - base_node->n_supers;
2239 if (node->supers[n] == base_type)
2240 atype = node->supers[n - 1];
2247 static inline gboolean
2248 type_node_check_conformities_UorL (TypeNode *node,
2249 TypeNode *iface_node,
2250 /* support_inheritance */
2251 gboolean support_interfaces,
2252 gboolean support_prerequisites,
2257 if (/* support_inheritance && */
2258 iface_node->n_supers <= node->n_supers &&
2259 node->supers[node->n_supers - iface_node->n_supers] == NODE_TYPE (iface_node))
2262 support_interfaces = support_interfaces && node->is_instantiatable && NODE_IS_IFACE (iface_node);
2263 support_prerequisites = support_prerequisites && NODE_IS_IFACE (node);
2265 if (support_interfaces || support_prerequisites)
2268 G_READ_LOCK (&type_rw_lock);
2269 if (support_interfaces && type_lookup_iface_entry_L (node, iface_node))
2271 else if (support_prerequisites && type_lookup_prerequisite_L (node, NODE_TYPE (iface_node)))
2274 G_READ_UNLOCK (&type_rw_lock);
2280 type_node_is_a_L (TypeNode *node,
2281 TypeNode *iface_node)
2283 return type_node_check_conformities_UorL (node, iface_node, TRUE, TRUE, TRUE);
2286 static inline gboolean
2287 type_node_conforms_to_U (TypeNode *node,
2288 TypeNode *iface_node,
2289 gboolean support_interfaces,
2290 gboolean support_prerequisites)
2292 return type_node_check_conformities_UorL (node, iface_node, support_interfaces, support_prerequisites, FALSE);
2296 g_type_is_a (GType type,
2299 TypeNode *node, *iface_node;
2302 node = lookup_type_node_I (type);
2303 iface_node = lookup_type_node_I (iface_type);
2304 is_a = node && iface_node && type_node_conforms_to_U (node, iface_node, TRUE, TRUE);
2309 GType* /* free result */
2310 g_type_children (GType type,
2315 node = lookup_type_node_I (type);
2320 G_READ_LOCK (&type_rw_lock); /* ->children is relocatable */
2321 children = g_new (GType, node->n_children + 1);
2322 memcpy (children, node->children, sizeof (GType) * node->n_children);
2323 children[node->n_children] = 0;
2326 *n_children = node->n_children;
2327 G_READ_UNLOCK (&type_rw_lock);
2340 GType* /* free result */
2341 g_type_interfaces (GType type,
2342 guint *n_interfaces)
2346 node = lookup_type_node_I (type);
2347 if (node && node->is_instantiatable)
2352 G_READ_LOCK (&type_rw_lock);
2353 ifaces = g_new (GType, CLASSED_NODE_N_IFACES (node) + 1);
2354 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
2355 ifaces[i] = CLASSED_NODE_IFACES_ENTRIES (node)[i].iface_type;
2359 *n_interfaces = CLASSED_NODE_N_IFACES (node);
2360 G_READ_UNLOCK (&type_rw_lock);
2373 typedef struct _QData QData;
2385 static inline gpointer
2386 type_get_qdata_L (TypeNode *node,
2389 GData *gdata = node->global_gdata;
2391 if (quark && gdata && gdata->n_qdatas)
2393 QData *qdatas = gdata->qdatas - 1;
2394 guint n_qdatas = gdata->n_qdatas;
2401 i = (n_qdatas + 1) / 2;
2403 if (quark == check->quark)
2405 else if (quark > check->quark)
2410 else /* if (quark < check->quark) */
2419 g_type_get_qdata (GType type,
2425 node = lookup_type_node_I (type);
2428 G_READ_LOCK (&type_rw_lock);
2429 data = type_get_qdata_L (node, quark);
2430 G_READ_UNLOCK (&type_rw_lock);
2434 g_return_val_if_fail (node != NULL, NULL);
2441 type_set_qdata_W (TypeNode *node,
2449 /* setup qdata list if necessary */
2450 if (!node->global_gdata)
2451 node->global_gdata = g_new0 (GData, 1);
2452 gdata = node->global_gdata;
2454 /* try resetting old data */
2455 qdata = gdata->qdatas;
2456 for (i = 0; i < gdata->n_qdatas; i++)
2457 if (qdata[i].quark == quark)
2459 qdata[i].data = data;
2465 gdata->qdatas = g_renew (QData, gdata->qdatas, gdata->n_qdatas);
2466 qdata = gdata->qdatas;
2467 for (i = 0; i < gdata->n_qdatas - 1; i++)
2468 if (qdata[i].quark > quark)
2470 g_memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
2471 qdata[i].quark = quark;
2472 qdata[i].data = data;
2476 g_type_set_qdata (GType type,
2482 g_return_if_fail (quark != 0);
2484 node = lookup_type_node_I (type);
2487 G_WRITE_LOCK (&type_rw_lock);
2488 type_set_qdata_W (node, quark, data);
2489 G_WRITE_UNLOCK (&type_rw_lock);
2492 g_return_if_fail (node != NULL);
2496 type_add_flags_W (TypeNode *node,
2501 g_return_if_fail ((flags & ~TYPE_FLAG_MASK) == 0);
2502 g_return_if_fail (node != NULL);
2504 if ((flags & TYPE_FLAG_MASK) && node->is_classed && node->data && node->data->class.class)
2505 g_warning ("tagging type `%s' as abstract after class initialization", NODE_NAME (node));
2506 dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2508 type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
2512 g_type_query (GType type,
2517 g_return_if_fail (query != NULL);
2519 /* if node is not static and classed, we won't allow query */
2521 node = lookup_type_node_I (type);
2522 if (node && node->is_classed && !node->plugin)
2524 /* type is classed and probably even instantiatable */
2525 G_READ_LOCK (&type_rw_lock);
2526 if (node->data) /* type is static or referenced */
2528 query->type = NODE_TYPE (node);
2529 query->type_name = NODE_NAME (node);
2530 query->class_size = node->data->class.class_size;
2531 query->instance_size = node->is_instantiatable ? node->data->instance.instance_size : 0;
2533 G_READ_UNLOCK (&type_rw_lock);
2538 /* --- implementation details --- */
2540 g_type_test_flags (GType type,
2544 gboolean result = FALSE;
2546 node = lookup_type_node_I (type);
2549 guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
2550 guint tflags = flags & TYPE_FLAG_MASK;
2554 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (node);
2556 fflags = (finfo->type_flags & fflags) == fflags;
2563 G_READ_LOCK (&type_rw_lock);
2564 tflags = (tflags & GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))) == tflags;
2565 G_READ_UNLOCK (&type_rw_lock);
2570 result = tflags && fflags;
2577 g_type_get_plugin (GType type)
2581 node = lookup_type_node_I (type);
2583 return node ? node->plugin : NULL;
2587 g_type_interface_get_plugin (GType instance_type,
2588 GType interface_type)
2593 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL); /* G_TYPE_IS_INTERFACE() is an external call: _U */
2595 node = lookup_type_node_I (instance_type);
2596 iface = lookup_type_node_I (interface_type);
2599 IFaceHolder *iholder;
2600 GTypePlugin *plugin;
2602 G_READ_LOCK (&type_rw_lock);
2604 iholder = iface_node_get_holders_L (iface);
2605 while (iholder && iholder->instance_type != instance_type)
2606 iholder = iholder->next;
2607 plugin = iholder ? iholder->plugin : NULL;
2609 G_READ_UNLOCK (&type_rw_lock);
2614 g_return_val_if_fail (node == NULL, NULL);
2615 g_return_val_if_fail (iface == NULL, NULL);
2617 g_warning (G_STRLOC ": attempt to look up plugin for invalid instance/interface type pair.");
2623 g_type_fundamental_next (void)
2627 G_READ_LOCK (&type_rw_lock);
2628 type = static_fundamental_next;
2629 G_READ_UNLOCK (&type_rw_lock);
2630 type = G_TYPE_MAKE_FUNDAMENTAL (type);
2631 return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
2635 g_type_fundamental (GType type_id)
2637 TypeNode *node = lookup_type_node_I (type_id);
2639 return node ? NODE_FUNDAMENTAL_TYPE (node) : 0;
2643 g_type_check_instance_is_a (GTypeInstance *type_instance,
2646 TypeNode *node, *iface;
2649 if (!type_instance || !type_instance->g_class)
2652 node = lookup_type_node_I (type_instance->g_class->g_type);
2653 iface = lookup_type_node_I (iface_type);
2654 check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
2660 g_type_check_class_is_a (GTypeClass *type_class,
2663 TypeNode *node, *iface;
2669 node = lookup_type_node_I (type_class->g_type);
2670 iface = lookup_type_node_I (is_a_type);
2671 check = node && node->is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
2677 g_type_check_instance_cast (GTypeInstance *type_instance,
2682 if (type_instance->g_class)
2684 TypeNode *node, *iface;
2685 gboolean is_instantiatable, check;
2687 node = lookup_type_node_I (type_instance->g_class->g_type);
2688 is_instantiatable = node && node->is_instantiatable;
2689 iface = lookup_type_node_I (iface_type);
2690 check = is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
2692 return type_instance;
2694 if (is_instantiatable)
2695 g_warning ("invalid cast from `%s' to `%s'",
2696 type_descriptive_name_I (type_instance->g_class->g_type),
2697 type_descriptive_name_I (iface_type));
2699 g_warning ("invalid uninstantiatable type `%s' in cast to `%s'",
2700 type_descriptive_name_I (type_instance->g_class->g_type),
2701 type_descriptive_name_I (iface_type));
2704 g_warning ("invalid unclassed pointer in cast to `%s'",
2705 type_descriptive_name_I (iface_type));
2708 g_warning ("invalid cast from (NULL) pointer to `%s'",
2709 type_descriptive_name_I (iface_type));
2711 return type_instance;
2715 g_type_check_class_cast (GTypeClass *type_class,
2720 TypeNode *node, *iface;
2721 gboolean is_classed, check;
2723 node = lookup_type_node_I (type_class->g_type);
2724 is_classed = node && node->is_classed;
2725 iface = lookup_type_node_I (is_a_type);
2726 check = is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
2731 g_warning ("invalid class cast from `%s' to `%s'",
2732 type_descriptive_name_I (type_class->g_type),
2733 type_descriptive_name_I (is_a_type));
2735 g_warning ("invalid unclassed type `%s' in class cast to `%s'",
2736 type_descriptive_name_I (type_class->g_type),
2737 type_descriptive_name_I (is_a_type));
2740 g_warning ("invalid class cast from (NULL) pointer to `%s'",
2741 type_descriptive_name_I (is_a_type));
2746 g_type_check_instance (GTypeInstance *type_instance)
2748 /* this function is just here to make the signal system
2749 * conveniently elaborated on instance checks
2753 if (type_instance->g_class)
2755 TypeNode *node = lookup_type_node_I (type_instance->g_class->g_type);
2757 if (node && node->is_instantiatable)
2760 g_warning ("instance of invalid non-instantiatable type `%s'",
2761 type_descriptive_name_I (type_instance->g_class->g_type));
2764 g_warning ("instance with invalid (NULL) class pointer");
2767 g_warning ("invalid (NULL) pointer instance");
2772 static inline gboolean
2773 type_check_is_value_type_U (GType type)
2775 GTypeFlags tflags = G_TYPE_FLAG_VALUE_ABSTRACT;
2778 /* common path speed up */
2779 node = lookup_type_node_I (type);
2780 if (node && node->mutatable_check_cache)
2783 G_READ_LOCK (&type_rw_lock);
2787 if (node->data && node->data->common.ref_count > 0 &&
2788 node->data->common.value_table->value_init)
2789 tflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2790 else if (NODE_IS_IFACE (node))
2794 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
2796 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
2797 TypeNode *prnode = lookup_type_node_I (prtype);
2799 if (prnode->is_instantiatable)
2802 node = lookup_type_node_I (type);
2808 G_READ_UNLOCK (&type_rw_lock);
2810 return !(tflags & G_TYPE_FLAG_VALUE_ABSTRACT);
2814 g_type_check_is_value_type (GType type)
2816 return type_check_is_value_type_U (type);
2820 g_type_check_value (GValue *value)
2822 return value && type_check_is_value_type_U (value->g_type);
2826 g_type_check_value_holds (GValue *value,
2829 return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
2833 g_type_value_table_peek (GType type)
2835 GTypeValueTable *vtable = NULL;
2836 TypeNode *node = lookup_type_node_I (type);
2837 gboolean has_refed_data, has_table;
2840 /* speed up common code path, we're not 100% safe here,
2841 * but we should only get called with referenced types anyway
2843 data = node ? node->data : NULL;
2844 if (node && node->mutatable_check_cache)
2845 return data->common.value_table;
2847 G_READ_LOCK (&type_rw_lock);
2850 has_refed_data = node && node->data && node->data->common.ref_count;
2851 has_table = has_refed_data && node->data->common.value_table->value_init;
2855 vtable = node->data->common.value_table;
2856 else if (NODE_IS_IFACE (node))
2860 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
2862 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
2863 TypeNode *prnode = lookup_type_node_I (prtype);
2865 if (prnode->is_instantiatable)
2868 node = lookup_type_node_I (type);
2869 goto restart_table_peek;
2875 G_READ_UNLOCK (&type_rw_lock);
2881 g_warning (G_STRLOC ": type id `%lu' is invalid", type);
2882 if (!has_refed_data)
2883 g_warning ("can't peek value table for type `%s' which is not currently referenced",
2884 type_descriptive_name_I (type));
2889 G_CONST_RETURN gchar*
2890 g_type_name_from_instance (GTypeInstance *instance)
2893 return "<NULL-instance>";
2895 return g_type_name_from_class (instance->g_class);
2898 G_CONST_RETURN gchar*
2899 g_type_name_from_class (GTypeClass *g_class)
2902 return "<NULL-class>";
2904 return g_type_name (g_class->g_type);
2908 /* --- foreign prototypes --- */
2909 extern void g_value_c_init (void); /* sync with gvalue.c */
2910 extern void g_value_types_init (void); /* sync with gvaluetypes.c */
2911 extern void g_enum_types_init (void); /* sync with genums.c */
2912 extern void g_param_type_init (void); /* sync with gparam.c */
2913 extern void g_boxed_type_init (void); /* sync with gboxed.c */
2914 extern void g_object_type_init (void); /* sync with gobject.c */
2915 extern void g_param_spec_types_init (void); /* sync with gparamspecs.c */
2916 extern void g_value_transforms_init (void); /* sync with gvaluetransform.c */
2917 extern void g_signal_init (void); /* sync with gsignal.c */
2920 /* --- initialization --- */
2922 g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
2924 G_LOCK_DEFINE_STATIC (type_init_lock);
2925 const gchar *env_string;
2930 G_LOCK (type_init_lock);
2932 G_WRITE_LOCK (&type_rw_lock);
2934 if (static_quark_type_flags)
2936 G_WRITE_UNLOCK (&type_rw_lock);
2937 G_UNLOCK (type_init_lock);
2941 /* setup GObject library wide debugging flags */
2942 _g_type_debug_flags = debug_flags & G_TYPE_DEBUG_MASK;
2943 env_string = g_getenv ("GOBJECT_DEBUG");
2944 if (env_string != NULL)
2946 static GDebugKey debug_keys[] = {
2947 { "objects", G_TYPE_DEBUG_OBJECTS },
2948 { "signals", G_TYPE_DEBUG_SIGNALS },
2951 _g_type_debug_flags |= g_parse_debug_string (env_string,
2953 sizeof (debug_keys) / sizeof (debug_keys[0]));
2958 static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
2959 static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
2960 static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
2962 /* type qname hash table */
2963 static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
2965 /* invalid type G_TYPE_INVALID (0)
2967 static_fundamental_type_nodes[0] = NULL;
2969 /* void type G_TYPE_NONE
2971 node = type_node_fundamental_new_W (G_TYPE_NONE, "void", 0);
2972 type = NODE_TYPE (node);
2973 g_assert (type == G_TYPE_NONE);
2975 /* interface fundamental type G_TYPE_INTERFACE (!classed)
2977 memset (&info, 0, sizeof (info));
2978 node = type_node_fundamental_new_W (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
2979 type = NODE_TYPE (node);
2980 type_data_make_W (node, &info, NULL);
2981 g_assert (type == G_TYPE_INTERFACE);
2983 G_WRITE_UNLOCK (&type_rw_lock);
2987 /* G_TYPE_TYPE_PLUGIN
2989 g_type_plugin_get_type ();
2991 /* G_TYPE_* value types
2993 g_value_types_init ();
2995 /* G_TYPE_ENUM & G_TYPE_FLAGS
2997 g_enum_types_init ();
3001 g_boxed_type_init ();
3005 g_param_type_init ();
3009 g_object_type_init ();
3011 /* G_TYPE_PARAM_* pspec types
3013 g_param_spec_types_init ();
3015 /* Value Transformations
3017 g_value_transforms_init ();
3023 G_UNLOCK (type_init_lock);
3029 g_type_init_with_debug_flags (0);