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.
20 #include "gobjectalias.h"
27 #include "gtypeplugin.h"
28 #include "gvaluecollector.h"
29 #include "gbsearcharray.h"
33 /* NOTE: some functions (some internal variants and exported ones)
34 * invalidate data portions of the TypeNodes. if external functions/callbacks
35 * are called, pointers to memory maintained by TypeNodes have to be looked up
36 * again. this affects most of the struct TypeNode fields, e.g. ->children or
37 * CLASSED_NODE_IFACES_ENTRIES() respectively IFACE_NODE_PREREQUISITES() (but
38 * not ->supers[]), as all those memory portions can get realloc()ed during
39 * callback invocation.
42 * - g_type_from_name() should do an ordered array lookup after fetching the
43 * the quark, instead of a second hashtable lookup.
46 * lock handling issues when calling static functions are indicated by
47 * uppercase letter postfixes, all static functions have to have
48 * one of the below postfixes:
49 * - _I: [Indifferent about locking]
50 * function doesn't care about locks at all
51 * - _U: [Unlocked invocation]
52 * no read or write lock has to be held across function invocation
53 * (locks may be acquired and released during invocation though)
54 * - _L: [Locked invocation]
55 * a write lock or more than 0 read locks have to be held across
57 * - _W: [Write-locked invocation]
58 * a write lock has to be held across function invokation
59 * - _Wm: [Write-locked invocation, mutatable]
60 * like _W, but the write lock might be released and reacquired
61 * during invocation, watch your pointers
64 static GStaticRWLock type_rw_lock = G_STATIC_RW_LOCK_INIT;
66 #define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_static_rw_lock_reader_lock (rw_lock); } while (0)
67 #define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_static_rw_lock_reader_unlock (rw_lock); } while (0)
68 #define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_static_rw_lock_writer_lock (rw_lock); } while (0)
69 #define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_static_rw_lock_writer_unlock (rw_lock); } while (0)
71 #define G_READ_LOCK(rw_lock) g_static_rw_lock_reader_lock (rw_lock)
72 #define G_READ_UNLOCK(rw_lock) g_static_rw_lock_reader_unlock (rw_lock)
73 #define G_WRITE_LOCK(rw_lock) g_static_rw_lock_writer_lock (rw_lock)
74 #define G_WRITE_UNLOCK(rw_lock) g_static_rw_lock_writer_unlock (rw_lock)
76 #define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
77 static const gchar *_action = " invalidly modified type "; \
78 gpointer _arg = (gpointer) (arg); const gchar *_tname = (type_name), *_fname = (func); \
80 g_error ("%s(%p)%s`%s'", _fname, _arg, _action, _tname); \
82 g_error ("%s()%s`%s'", _fname, _action, _tname); \
84 #define g_return_val_if_uninitialized(condition, init_function, return_value) G_STMT_START{ \
87 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
88 "%s: initialization assertion failed, use %s() prior to this function", \
89 G_STRLOC, G_STRINGIFY (init_function)); \
90 return (return_value); \
95 #define DEBUG_CODE(debug_type, code_block) G_STMT_START { \
96 if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) \
99 #else /* !G_ENABLE_DEBUG */
100 #define DEBUG_CODE(debug_type, code_block) /* code_block */
101 #endif /* G_ENABLE_DEBUG */
103 #define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
104 G_TYPE_FLAG_INSTANTIATABLE | \
105 G_TYPE_FLAG_DERIVABLE | \
106 G_TYPE_FLAG_DEEP_DERIVABLE)
107 #define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT)
108 #define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
109 sizeof (gpointer)), \
112 /* The 2*sizeof(size_t) alignment here is borrowed from
113 * GNU libc, so it should be good most everywhere.
114 * It is more conservative than is needed on some 64-bit
115 * platforms, but ia64 does require a 16-byte alignment.
116 * The SIMD extensions for x86 and ppc32 would want a
117 * larger alignment than this, but we don't need to
118 * do better than malloc.
120 #define STRUCT_ALIGNMENT (2 * sizeof (gsize))
121 #define ALIGN_STRUCT(offset) \
122 ((offset + (STRUCT_ALIGNMENT - 1)) & -STRUCT_ALIGNMENT)
125 /* --- typedefs --- */
126 typedef struct _TypeNode TypeNode;
127 typedef struct _CommonData CommonData;
128 typedef struct _IFaceData IFaceData;
129 typedef struct _ClassData ClassData;
130 typedef struct _InstanceData InstanceData;
131 typedef union _TypeData TypeData;
132 typedef struct _IFaceEntry IFaceEntry;
133 typedef struct _IFaceHolder IFaceHolder;
136 /* --- prototypes --- */
137 static inline GTypeFundamentalInfo* type_node_fundamental_info_I (TypeNode *node);
138 static void type_add_flags_W (TypeNode *node,
140 static void type_data_make_W (TypeNode *node,
141 const GTypeInfo *info,
142 const GTypeValueTable *value_table);
143 static inline void type_data_ref_Wm (TypeNode *node);
144 static inline void type_data_unref_Wm (TypeNode *node,
146 static void type_data_last_unref_Wm (GType type,
148 static inline gpointer type_get_qdata_L (TypeNode *node,
150 static inline void type_set_qdata_W (TypeNode *node,
153 static IFaceHolder* type_iface_peek_holder_L (TypeNode *iface,
154 GType instance_type);
155 static gboolean type_iface_vtable_base_init_Wm (TypeNode *iface,
157 static void type_iface_vtable_iface_init_Wm (TypeNode *iface,
159 static gboolean type_node_is_a_L (TypeNode *node,
160 TypeNode *iface_node);
163 /* --- enumeration --- */
165 /* The InitState enumeration is used to track the progress of initializing
166 * both classes and interface vtables. Keeping the state of initialization
167 * is necessary to handle new interfaces being added while we are initializing
168 * the class or other interfaces.
180 /* --- structures --- */
184 guint n_children : 12;
186 guint _prot_n_ifaces_prerequisites : 9;
187 guint is_classed : 1;
188 guint is_instantiatable : 1;
189 guint mutatable_check_cache : 1; /* combines some common path checks */
191 TypeData * volatile data;
195 IFaceEntry *iface_entries; /* for !iface types */
196 GType *prerequisistes;
198 GType supers[1]; /* flexible array */
200 #define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
201 #define MAX_N_SUPERS (255)
202 #define MAX_N_CHILDREN (4095)
203 #define MAX_N_IFACES (511)
204 #define MAX_N_PREREQUISITES (MAX_N_IFACES)
205 #define NODE_TYPE(node) (node->supers[0])
206 #define NODE_PARENT_TYPE(node) (node->supers[1])
207 #define NODE_FUNDAMENTAL_TYPE(node) (node->supers[node->n_supers])
208 #define NODE_NAME(node) (g_quark_to_string (node->qname))
209 #define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
210 #define CLASSED_NODE_N_IFACES(node) ((node)->_prot_n_ifaces_prerequisites)
211 #define CLASSED_NODE_IFACES_ENTRIES(node) ((node)->_prot.iface_entries)
212 #define IFACE_NODE_N_PREREQUISITES(node) ((node)->_prot_n_ifaces_prerequisites)
213 #define IFACE_NODE_PREREQUISITES(node) ((node)->_prot.prerequisistes)
214 #define iface_node_get_holders_L(node) ((IFaceHolder*) type_get_qdata_L ((node), static_quark_iface_holder))
215 #define iface_node_set_holders_W(node, holders) (type_set_qdata_W ((node), static_quark_iface_holder, (holders)))
216 #define iface_node_get_dependants_array_L(n) ((GType*) type_get_qdata_L ((n), static_quark_dependants_array))
217 #define iface_node_set_dependants_array_W(n,d) (type_set_qdata_W ((n), static_quark_dependants_array, (d)))
218 #define TYPE_ID_MASK ((GType) ((1 << G_TYPE_FUNDAMENTAL_SHIFT) - 1))
220 #define NODE_IS_ANCESTOR(ancestor, node) \
221 ((ancestor)->n_supers <= (node)->n_supers && \
222 (node)->supers[(node)->n_supers - (ancestor)->n_supers] == NODE_TYPE (ancestor))
228 GInterfaceInfo *info;
235 GTypeInterface *vtable;
236 InitState init_state;
241 GTypeValueTable *value_table;
247 GBaseInitFunc vtable_init_base;
248 GBaseFinalizeFunc vtable_finalize_base;
249 GClassInitFunc dflt_init;
250 GClassFinalizeFunc dflt_finalize;
251 gconstpointer dflt_data;
252 gpointer dflt_vtable;
258 guint init_state : 4;
259 GBaseInitFunc class_init_base;
260 GBaseFinalizeFunc class_finalize_base;
261 GClassInitFunc class_init;
262 GClassFinalizeFunc class_finalize;
263 gconstpointer class_data;
270 guint init_state : 4;
271 GBaseInitFunc class_init_base;
272 GBaseFinalizeFunc class_finalize_base;
273 GClassInitFunc class_init;
274 GClassFinalizeFunc class_finalize;
275 gconstpointer class_data;
277 guint16 instance_size;
278 guint16 private_size;
280 GInstanceInitFunc instance_init;
281 GMemChunk *mem_chunk;
288 InstanceData instance;
292 GTypeClassCacheFunc cache_func;
296 GTypeInterfaceCheckFunc check_func;
300 /* --- variables --- */
301 static guint static_n_class_cache_funcs = 0;
302 static ClassCacheFunc *static_class_cache_funcs = NULL;
303 static guint static_n_iface_check_funcs = 0;
304 static IFaceCheckFunc *static_iface_check_funcs = NULL;
305 static GQuark static_quark_type_flags = 0;
306 static GQuark static_quark_iface_holder = 0;
307 static GQuark static_quark_dependants_array = 0;
308 GTypeDebugFlags _g_type_debug_flags = 0;
311 /* --- type nodes --- */
312 static GHashTable *static_type_nodes_ht = NULL;
313 static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { NULL, };
314 static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
316 static inline TypeNode*
317 lookup_type_node_I (register GType utype)
319 if (utype > G_TYPE_FUNDAMENTAL_MAX)
320 return (TypeNode*) (utype & ~TYPE_ID_MASK);
322 return static_fundamental_type_nodes[utype >> G_TYPE_FUNDAMENTAL_SHIFT];
326 type_node_any_new_W (TypeNode *pnode,
330 GTypeFundamentalFlags type_flags)
335 guint i, node_size = 0;
337 n_supers = pnode ? pnode->n_supers + 1 : 0;
340 node_size += SIZEOF_FUNDAMENTAL_INFO; /* fundamental type info */
341 node_size += SIZEOF_BASE_TYPE_NODE (); /* TypeNode structure */
342 node_size += (sizeof (GType) * (1 + n_supers + 1)); /* self + ancestors + (0) for ->supers[] */
343 node = g_malloc0 (node_size);
344 if (!pnode) /* offset fundamental types */
346 node = G_STRUCT_MEMBER_P (node, SIZEOF_FUNDAMENTAL_INFO);
347 static_fundamental_type_nodes[ftype >> G_TYPE_FUNDAMENTAL_SHIFT] = node;
353 g_assert ((type & TYPE_ID_MASK) == 0);
355 node->n_supers = n_supers;
358 node->supers[0] = type;
361 node->is_classed = (type_flags & G_TYPE_FLAG_CLASSED) != 0;
362 node->is_instantiatable = (type_flags & G_TYPE_FLAG_INSTANTIATABLE) != 0;
364 if (NODE_IS_IFACE (node))
366 IFACE_NODE_N_PREREQUISITES (node) = 0;
367 IFACE_NODE_PREREQUISITES (node) = NULL;
371 CLASSED_NODE_N_IFACES (node) = 0;
372 CLASSED_NODE_IFACES_ENTRIES (node) = NULL;
377 node->supers[0] = type;
378 memcpy (node->supers + 1, pnode->supers, sizeof (GType) * (1 + pnode->n_supers + 1));
380 node->is_classed = pnode->is_classed;
381 node->is_instantiatable = pnode->is_instantiatable;
383 if (NODE_IS_IFACE (node))
385 IFACE_NODE_N_PREREQUISITES (node) = 0;
386 IFACE_NODE_PREREQUISITES (node) = NULL;
392 CLASSED_NODE_N_IFACES (node) = CLASSED_NODE_N_IFACES (pnode);
393 CLASSED_NODE_IFACES_ENTRIES (node) = g_memdup (CLASSED_NODE_IFACES_ENTRIES (pnode),
394 sizeof (CLASSED_NODE_IFACES_ENTRIES (pnode)[0]) *
395 CLASSED_NODE_N_IFACES (node));
396 for (j = 0; j < CLASSED_NODE_N_IFACES (node); j++)
398 CLASSED_NODE_IFACES_ENTRIES (node)[j].vtable = NULL;
399 CLASSED_NODE_IFACES_ENTRIES (node)[j].init_state = UNINITIALIZED;
403 i = pnode->n_children++;
404 pnode->children = g_renew (GType, pnode->children, pnode->n_children);
405 pnode->children[i] = type;
408 node->plugin = plugin;
409 node->n_children = 0;
410 node->children = NULL;
412 node->qname = g_quark_from_string (name);
413 node->global_gdata = NULL;
415 g_hash_table_insert (static_type_nodes_ht,
416 GUINT_TO_POINTER (node->qname),
421 static inline GTypeFundamentalInfo*
422 type_node_fundamental_info_I (TypeNode *node)
424 GType ftype = NODE_FUNDAMENTAL_TYPE (node);
426 if (ftype != NODE_TYPE (node))
427 node = lookup_type_node_I (ftype);
429 return node ? G_STRUCT_MEMBER_P (node, -SIZEOF_FUNDAMENTAL_INFO) : NULL;
433 type_node_fundamental_new_W (GType ftype,
435 GTypeFundamentalFlags type_flags)
437 GTypeFundamentalInfo *finfo;
440 g_assert ((ftype & TYPE_ID_MASK) == 0);
441 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX);
443 if (ftype >> G_TYPE_FUNDAMENTAL_SHIFT == static_fundamental_next)
444 static_fundamental_next++;
446 type_flags &= TYPE_FUNDAMENTAL_FLAG_MASK;
448 node = type_node_any_new_W (NULL, ftype, name, NULL, type_flags);
450 finfo = type_node_fundamental_info_I (node);
451 finfo->type_flags = type_flags;
457 type_node_new_W (TypeNode *pnode,
463 g_assert (pnode->n_supers < MAX_N_SUPERS);
464 g_assert (pnode->n_children < MAX_N_CHILDREN);
466 return type_node_any_new_W (pnode, NODE_FUNDAMENTAL_TYPE (pnode), name, plugin, 0);
469 static inline IFaceEntry*
470 type_lookup_iface_entry_L (TypeNode *node,
471 TypeNode *iface_node)
473 if (NODE_IS_IFACE (iface_node) && CLASSED_NODE_N_IFACES (node))
475 IFaceEntry *ifaces = CLASSED_NODE_IFACES_ENTRIES (node) - 1;
476 guint n_ifaces = CLASSED_NODE_N_IFACES (node);
477 GType iface_type = NODE_TYPE (iface_node);
484 i = (n_ifaces + 1) >> 1;
486 if (iface_type == check->iface_type)
488 else if (iface_type > check->iface_type)
493 else /* if (iface_type < check->iface_type) */
502 static inline gboolean
503 type_lookup_prerequisite_L (TypeNode *iface,
504 GType prerequisite_type)
506 if (NODE_IS_IFACE (iface) && IFACE_NODE_N_PREREQUISITES (iface))
508 GType *prerequisites = IFACE_NODE_PREREQUISITES (iface) - 1;
509 guint n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
516 i = (n_prerequisites + 1) >> 1;
517 check = prerequisites + i;
518 if (prerequisite_type == *check)
520 else if (prerequisite_type > *check)
522 n_prerequisites -= i;
523 prerequisites = check;
525 else /* if (prerequisite_type < *check) */
526 n_prerequisites = i - 1;
528 while (n_prerequisites);
534 type_descriptive_name_I (GType type)
538 TypeNode *node = lookup_type_node_I (type);
540 return node ? NODE_NAME (node) : "<unknown>";
547 /* --- type consistency checks --- */
549 check_plugin_U (GTypePlugin *plugin,
550 gboolean need_complete_type_info,
551 gboolean need_complete_interface_info,
552 const gchar *type_name)
554 /* G_IS_TYPE_PLUGIN() and G_TYPE_PLUGIN_GET_CLASS() are external calls: _U
558 g_warning ("plugin handle for type `%s' is NULL",
562 if (!G_IS_TYPE_PLUGIN (plugin))
564 g_warning ("plugin pointer (%p) for type `%s' is invalid",
568 if (need_complete_type_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_type_info)
570 g_warning ("plugin for type `%s' has no complete_type_info() implementation",
574 if (need_complete_interface_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_interface_info)
576 g_warning ("plugin for type `%s' has no complete_interface_info() implementation",
584 check_type_name_I (const gchar *type_name)
586 static const gchar *extra_chars = "-_+";
587 const gchar *p = type_name;
590 if (!type_name[0] || !type_name[1] || !type_name[2])
592 g_warning ("type name `%s' is too short", type_name);
595 /* check the first letter */
596 name_valid = (p[0] >= 'A' && p[0] <= 'Z') || (p[0] >= 'a' && p[0] <= 'z') || p[0] == '_';
597 for (p = type_name + 1; *p; p++)
598 name_valid &= ((p[0] >= 'A' && p[0] <= 'Z') ||
599 (p[0] >= 'a' && p[0] <= 'z') ||
600 (p[0] >= '0' && p[0] <= '9') ||
601 strchr (extra_chars, p[0]));
604 g_warning ("type name `%s' contains invalid characters", type_name);
607 if (g_type_from_name (type_name))
609 g_warning ("cannot register existing type `%s'", type_name);
617 check_derivation_I (GType parent_type,
618 const gchar *type_name)
621 GTypeFundamentalInfo* finfo;
623 pnode = lookup_type_node_I (parent_type);
626 g_warning ("cannot derive type `%s' from invalid parent type `%s'",
628 type_descriptive_name_I (parent_type));
631 finfo = type_node_fundamental_info_I (pnode);
632 /* ensure flat derivability */
633 if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
635 g_warning ("cannot derive `%s' from non-derivable parent type `%s'",
640 /* ensure deep derivability */
641 if (parent_type != NODE_FUNDAMENTAL_TYPE (pnode) &&
642 !(finfo->type_flags & G_TYPE_FLAG_DEEP_DERIVABLE))
644 g_warning ("cannot derive `%s' from non-fundamental parent type `%s'",
654 check_collect_format_I (const gchar *collect_format)
656 const gchar *p = collect_format;
657 gchar valid_format[] = { G_VALUE_COLLECT_INT, G_VALUE_COLLECT_LONG,
658 G_VALUE_COLLECT_INT64, G_VALUE_COLLECT_DOUBLE,
659 G_VALUE_COLLECT_POINTER, 0 };
662 if (!strchr (valid_format, *p++))
664 return p - collect_format <= G_VALUE_COLLECT_FORMAT_MAX_LENGTH;
668 check_value_table_I (const gchar *type_name,
669 const GTypeValueTable *value_table)
673 else if (value_table->value_init == NULL)
675 if (value_table->value_free || value_table->value_copy ||
676 value_table->value_peek_pointer ||
677 value_table->collect_format || value_table->collect_value ||
678 value_table->lcopy_format || value_table->lcopy_value)
679 g_warning ("cannot handle uninitializable values of type `%s'",
683 else /* value_table->value_init != NULL */
685 if (!value_table->value_free)
688 * g_warning ("missing `value_free()' for type `%s'", type_name);
692 if (!value_table->value_copy)
694 g_warning ("missing `value_copy()' for type `%s'", type_name);
697 if ((value_table->collect_format || value_table->collect_value) &&
698 (!value_table->collect_format || !value_table->collect_value))
700 g_warning ("one of `collect_format' and `collect_value()' is unspecified for type `%s'",
704 if (value_table->collect_format && !check_collect_format_I (value_table->collect_format))
706 g_warning ("the `%s' specification for type `%s' is too long or invalid",
711 if ((value_table->lcopy_format || value_table->lcopy_value) &&
712 (!value_table->lcopy_format || !value_table->lcopy_value))
714 g_warning ("one of `lcopy_format' and `lcopy_value()' is unspecified for type `%s'",
718 if (value_table->lcopy_format && !check_collect_format_I (value_table->lcopy_format))
720 g_warning ("the `%s' specification for type `%s' is too long or invalid",
730 check_type_info_I (TypeNode *pnode,
732 const gchar *type_name,
733 const GTypeInfo *info)
735 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (lookup_type_node_I (ftype));
736 gboolean is_interface = ftype == G_TYPE_INTERFACE;
738 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX && !(ftype & TYPE_ID_MASK));
740 /* check instance members */
741 if (!(finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
742 (info->instance_size || info->n_preallocs || info->instance_init))
745 g_warning ("cannot instantiate `%s', derived from non-instantiatable parent type `%s'",
749 g_warning ("cannot instantiate `%s' as non-instantiatable fundamental",
753 /* check class & interface members */
754 if (!((finfo->type_flags & G_TYPE_FLAG_CLASSED) || is_interface) &&
755 (info->class_init || info->class_finalize || info->class_data ||
756 info->class_size || info->base_init || info->base_finalize))
759 g_warning ("cannot create class for `%s', derived from non-classed parent type `%s'",
763 g_warning ("cannot create class for `%s' as non-classed fundamental",
767 /* check interface size */
768 if (is_interface && info->class_size < sizeof (GTypeInterface))
770 g_warning ("specified interface size for type `%s' is smaller than `GTypeInterface' size",
774 /* check class size */
775 if (finfo->type_flags & G_TYPE_FLAG_CLASSED)
777 if (info->class_size < sizeof (GTypeClass))
779 g_warning ("specified class size for type `%s' is smaller than `GTypeClass' size",
783 if (pnode && info->class_size < pnode->data->class.class_size)
785 g_warning ("specified class size for type `%s' is smaller "
786 "than the parent type's `%s' class size",
792 /* check instance size */
793 if (finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE)
795 if (info->instance_size < sizeof (GTypeInstance))
797 g_warning ("specified instance size for type `%s' is smaller than `GTypeInstance' size",
801 if (pnode && info->instance_size < pnode->data->instance.instance_size)
803 g_warning ("specified instance size for type `%s' is smaller "
804 "than the parent type's `%s' instance size",
815 find_conforming_child_type_L (TypeNode *pnode,
818 TypeNode *node = NULL;
821 if (type_lookup_iface_entry_L (pnode, iface))
824 for (i = 0; i < pnode->n_children && !node; i++)
825 node = find_conforming_child_type_L (lookup_type_node_I (pnode->children[i]), iface);
831 check_add_interface_L (GType instance_type,
834 TypeNode *node = lookup_type_node_I (instance_type);
835 TypeNode *iface = lookup_type_node_I (iface_type);
838 GType *prerequisites;
842 if (!node || !node->is_instantiatable)
844 g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
845 type_descriptive_name_I (instance_type));
848 if (!iface || !NODE_IS_IFACE (iface))
850 g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
851 type_descriptive_name_I (iface_type),
855 tnode = lookup_type_node_I (NODE_PARENT_TYPE (iface));
856 if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry_L (node, tnode))
858 /* 2001/7/31:timj: erk, i guess this warning is junk as interface derivation is flat */
859 g_warning ("cannot add sub-interface `%s' to type `%s' which does not conform to super-interface `%s'",
865 /* allow overriding of interface type introduced for parent type */
866 entry = type_lookup_iface_entry_L (node, iface);
867 if (entry && entry->vtable == NULL && !type_iface_peek_holder_L (iface, NODE_TYPE (node)))
869 /* ok, we do conform to this interface already, but the interface vtable was not
870 * yet intialized, and we just conform to the interface because it got added to
871 * one of our parents. so we allow overriding of holder info here.
875 /* check whether one of our children already conforms (or whether the interface
876 * got added to this node already)
878 tnode = find_conforming_child_type_L (node, iface); /* tnode is_a node */
881 g_warning ("cannot add interface type `%s' to type `%s', since type `%s' already conforms to interface",
887 prerequisites = IFACE_NODE_PREREQUISITES (iface);
888 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
890 tnode = lookup_type_node_I (prerequisites[i]);
891 if (!type_node_is_a_L (node, tnode))
893 g_warning ("cannot add interface type `%s' to type `%s' which does not conform to prerequisite `%s'",
904 check_interface_info_I (TypeNode *iface,
906 const GInterfaceInfo *info)
908 if ((info->interface_finalize || info->interface_data) && !info->interface_init)
910 g_warning ("interface type `%s' for type `%s' comes without initializer",
912 type_descriptive_name_I (instance_type));
919 /* --- type info (type node data) --- */
921 type_data_make_W (TypeNode *node,
922 const GTypeInfo *info,
923 const GTypeValueTable *value_table)
926 GTypeValueTable *vtable = NULL;
927 guint vtable_size = 0;
929 g_assert (node->data == NULL && info != NULL);
933 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
936 vtable = pnode->data->common.value_table;
939 static const GTypeValueTable zero_vtable = { NULL, };
941 value_table = &zero_vtable;
946 /* need to setup vtable_size since we have to allocate it with data in one chunk */
947 vtable_size = sizeof (GTypeValueTable);
948 if (value_table->collect_format)
949 vtable_size += strlen (value_table->collect_format);
950 if (value_table->lcopy_format)
951 vtable_size += strlen (value_table->lcopy_format);
955 if (node->is_instantiatable) /* carefull, is_instantiatable is also is_classed */
957 data = g_malloc0 (sizeof (InstanceData) + vtable_size);
959 vtable = G_STRUCT_MEMBER_P (data, sizeof (InstanceData));
960 data->instance.class_size = info->class_size;
961 data->instance.class_init_base = info->base_init;
962 data->instance.class_finalize_base = info->base_finalize;
963 data->instance.class_init = info->class_init;
964 data->instance.class_finalize = info->class_finalize;
965 data->instance.class_data = info->class_data;
966 data->instance.class = NULL;
967 data->instance.init_state = UNINITIALIZED;
968 data->instance.instance_size = info->instance_size;
969 /* We'll set the final value for data->instance.private size
970 * after the parent class has been initialized
972 data->instance.private_size = 0;
973 #ifdef DISABLE_MEM_POOLS
974 data->instance.n_preallocs = 0;
975 #else /* !DISABLE_MEM_POOLS */
976 data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
977 #endif /* !DISABLE_MEM_POOLS */
978 data->instance.instance_init = info->instance_init;
979 data->instance.mem_chunk = NULL;
981 else if (node->is_classed) /* only classed */
983 data = g_malloc0 (sizeof (ClassData) + vtable_size);
985 vtable = G_STRUCT_MEMBER_P (data, sizeof (ClassData));
986 data->class.class_size = info->class_size;
987 data->class.class_init_base = info->base_init;
988 data->class.class_finalize_base = info->base_finalize;
989 data->class.class_init = info->class_init;
990 data->class.class_finalize = info->class_finalize;
991 data->class.class_data = info->class_data;
992 data->class.class = NULL;
993 data->class.init_state = UNINITIALIZED;
995 else if (NODE_IS_IFACE (node))
997 data = g_malloc0 (sizeof (IFaceData) + vtable_size);
999 vtable = G_STRUCT_MEMBER_P (data, sizeof (IFaceData));
1000 data->iface.vtable_size = info->class_size;
1001 data->iface.vtable_init_base = info->base_init;
1002 data->iface.vtable_finalize_base = info->base_finalize;
1003 data->iface.dflt_init = info->class_init;
1004 data->iface.dflt_finalize = info->class_finalize;
1005 data->iface.dflt_data = info->class_data;
1006 data->iface.dflt_vtable = NULL;
1010 data = g_malloc0 (sizeof (CommonData) + vtable_size);
1012 vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
1016 node->data->common.ref_count = 1;
1022 /* we allocate the vtable and its strings together with the type data, so
1023 * children can take over their parent's vtable pointer, and we don't
1024 * need to worry freeing it or not when the child data is destroyed
1026 *vtable = *value_table;
1027 p = G_STRUCT_MEMBER_P (vtable, sizeof (*vtable));
1029 vtable->collect_format = p;
1030 if (value_table->collect_format)
1032 strcat (p, value_table->collect_format);
1033 p += strlen (value_table->collect_format);
1037 vtable->lcopy_format = p;
1038 if (value_table->lcopy_format)
1039 strcat (p, value_table->lcopy_format);
1041 node->data->common.value_table = vtable;
1042 node->mutatable_check_cache = (node->data->common.value_table->value_init != NULL &&
1043 !((G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_ABSTRACT) &
1044 GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))));
1046 g_assert (node->data->common.value_table != NULL); /* paranoid */
1050 type_data_ref_Wm (TypeNode *node)
1054 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1056 GTypeValueTable tmp_value_table;
1058 g_assert (node->plugin != NULL);
1062 type_data_ref_Wm (pnode);
1064 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1067 memset (&tmp_info, 0, sizeof (tmp_info));
1068 memset (&tmp_value_table, 0, sizeof (tmp_value_table));
1070 G_WRITE_UNLOCK (&type_rw_lock);
1071 g_type_plugin_use (node->plugin);
1072 g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
1073 G_WRITE_LOCK (&type_rw_lock);
1075 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1077 check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (node), NODE_NAME (node), &tmp_info);
1078 type_data_make_W (node, &tmp_info,
1079 check_value_table_I (NODE_NAME (node),
1080 &tmp_value_table) ? &tmp_value_table : NULL);
1084 g_assert (node->data->common.ref_count > 0);
1086 node->data->common.ref_count += 1;
1091 type_data_unref_Wm (TypeNode *node,
1094 g_assert (node->data && node->data->common.ref_count);
1096 if (node->data->common.ref_count > 1)
1097 node->data->common.ref_count -= 1;
1102 g_warning ("static type `%s' unreferenced too often",
1107 type_data_last_unref_Wm (NODE_TYPE (node), uncached);
1112 type_node_add_iface_entry_W (TypeNode *node,
1114 IFaceEntry *parent_entry)
1116 IFaceEntry *entries;
1119 g_assert (node->is_instantiatable && CLASSED_NODE_N_IFACES (node) < MAX_N_IFACES);
1121 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1122 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1123 if (entries[i].iface_type == iface_type)
1125 /* this can happen in two cases:
1126 * - our parent type already conformed to iface_type and node
1127 * got it's own holder info. here, our children already have
1128 * entries and NULL vtables, since this will only work for
1129 * uninitialized classes.
1130 * - an interface type is added to an ancestor after it was
1131 * added to a child type.
1134 g_assert (entries[i].vtable == NULL && entries[i].init_state == UNINITIALIZED);
1137 /* sick, interface is added to ancestor *after* child type;
1138 * nothing todo, the entry and our children were already setup correctly
1143 else if (entries[i].iface_type > iface_type)
1145 CLASSED_NODE_N_IFACES (node) += 1;
1146 CLASSED_NODE_IFACES_ENTRIES (node) = g_renew (IFaceEntry,
1147 CLASSED_NODE_IFACES_ENTRIES (node),
1148 CLASSED_NODE_N_IFACES (node));
1149 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1150 g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (CLASSED_NODE_N_IFACES (node) - i - 1));
1151 entries[i].iface_type = iface_type;
1152 entries[i].vtable = NULL;
1153 entries[i].init_state = UNINITIALIZED;
1157 if (node->data && node->data->class.init_state >= BASE_IFACE_INIT)
1159 entries[i].init_state = INITIALIZED;
1160 entries[i].vtable = parent_entry->vtable;
1162 for (i = 0; i < node->n_children; i++)
1163 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), iface_type, &entries[i]);
1168 type_add_interface_Wm (TypeNode *node,
1170 const GInterfaceInfo *info,
1171 GTypePlugin *plugin)
1173 IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
1177 g_assert (node->is_instantiatable && NODE_IS_IFACE (iface) && ((info && !plugin) || (!info && plugin)));
1179 iholder->next = iface_node_get_holders_L (iface);
1180 iface_node_set_holders_W (iface, iholder);
1181 iholder->instance_type = NODE_TYPE (node);
1182 iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
1183 iholder->plugin = plugin;
1185 /* create an iface entry for this type */
1186 type_node_add_iface_entry_W (node, NODE_TYPE (iface), NULL);
1188 /* if the class is already (partly) initialized, we may need to base
1189 * initalize and/or initialize the new interface.
1193 InitState class_state = node->data->class.init_state;
1195 if (class_state >= BASE_IFACE_INIT)
1196 type_iface_vtable_base_init_Wm (iface, node);
1198 if (class_state >= IFACE_INIT)
1199 type_iface_vtable_iface_init_Wm (iface, node);
1202 /* create iface entries for children of this type */
1203 entry = type_lookup_iface_entry_L (node, iface);
1204 for (i = 0; i < node->n_children; i++)
1205 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), NODE_TYPE (iface), entry);
1209 type_iface_add_prerequisite_W (TypeNode *iface,
1210 TypeNode *prerequisite_node)
1212 GType prerequisite_type = NODE_TYPE (prerequisite_node);
1213 GType *prerequisites, *dependants;
1214 guint n_dependants, i;
1216 g_assert (NODE_IS_IFACE (iface) &&
1217 IFACE_NODE_N_PREREQUISITES (iface) < MAX_N_PREREQUISITES &&
1218 (prerequisite_node->is_instantiatable || NODE_IS_IFACE (prerequisite_node)));
1220 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1221 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1222 if (prerequisites[i] == prerequisite_type)
1223 return; /* we already have that prerequisiste */
1224 else if (prerequisites[i] > prerequisite_type)
1226 IFACE_NODE_N_PREREQUISITES (iface) += 1;
1227 IFACE_NODE_PREREQUISITES (iface) = g_renew (GType,
1228 IFACE_NODE_PREREQUISITES (iface),
1229 IFACE_NODE_N_PREREQUISITES (iface));
1230 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1231 g_memmove (prerequisites + i + 1, prerequisites + i,
1232 sizeof (prerequisites[0]) * (IFACE_NODE_N_PREREQUISITES (iface) - i - 1));
1233 prerequisites[i] = prerequisite_type;
1235 /* we want to get notified when prerequisites get added to prerequisite_node */
1236 if (NODE_IS_IFACE (prerequisite_node))
1238 dependants = iface_node_get_dependants_array_L (prerequisite_node);
1239 n_dependants = dependants ? dependants[0] : 0;
1241 dependants = g_renew (GType, dependants, n_dependants + 1);
1242 dependants[n_dependants] = NODE_TYPE (iface);
1243 dependants[0] = n_dependants;
1244 iface_node_set_dependants_array_W (prerequisite_node, dependants);
1247 /* we need to notify all dependants */
1248 dependants = iface_node_get_dependants_array_L (iface);
1249 n_dependants = dependants ? dependants[0] : 0;
1250 for (i = 1; i <= n_dependants; i++)
1251 type_iface_add_prerequisite_W (lookup_type_node_I (dependants[i]), prerequisite_node);
1255 g_type_interface_add_prerequisite (GType interface_type,
1256 GType prerequisite_type)
1258 TypeNode *iface, *prerequisite_node;
1259 IFaceHolder *holders;
1261 g_return_if_fail (G_TYPE_IS_INTERFACE (interface_type)); /* G_TYPE_IS_INTERFACE() is an external call: _U */
1262 g_return_if_fail (!g_type_is_a (interface_type, prerequisite_type));
1263 g_return_if_fail (!g_type_is_a (prerequisite_type, interface_type));
1265 iface = lookup_type_node_I (interface_type);
1266 prerequisite_node = lookup_type_node_I (prerequisite_type);
1267 if (!iface || !prerequisite_node || !NODE_IS_IFACE (iface))
1269 g_warning ("interface type `%s' or prerequisite type `%s' invalid",
1270 type_descriptive_name_I (interface_type),
1271 type_descriptive_name_I (prerequisite_type));
1274 G_WRITE_LOCK (&type_rw_lock);
1275 holders = iface_node_get_holders_L (iface);
1278 G_WRITE_UNLOCK (&type_rw_lock);
1279 g_warning ("unable to add prerequisite `%s' to interface `%s' which is already in use for `%s'",
1280 type_descriptive_name_I (prerequisite_type),
1281 type_descriptive_name_I (interface_type),
1282 type_descriptive_name_I (holders->instance_type));
1285 if (prerequisite_node->is_instantiatable)
1289 /* can have at most one publically installable instantiatable prerequisite */
1290 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1292 TypeNode *prnode = lookup_type_node_I (IFACE_NODE_PREREQUISITES (iface)[i]);
1294 if (prnode->is_instantiatable)
1296 G_WRITE_UNLOCK (&type_rw_lock);
1297 g_warning ("adding prerequisite `%s' to interface `%s' conflicts with existing prerequisite `%s'",
1298 type_descriptive_name_I (prerequisite_type),
1299 type_descriptive_name_I (interface_type),
1300 type_descriptive_name_I (NODE_TYPE (prnode)));
1305 for (i = 0; i < prerequisite_node->n_supers + 1; i++)
1306 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisite_node->supers[i]));
1307 G_WRITE_UNLOCK (&type_rw_lock);
1309 else if (NODE_IS_IFACE (prerequisite_node))
1311 GType *prerequisites;
1314 prerequisites = IFACE_NODE_PREREQUISITES (prerequisite_node);
1315 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (prerequisite_node); i++)
1316 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisites[i]));
1317 type_iface_add_prerequisite_W (iface, prerequisite_node);
1318 G_WRITE_UNLOCK (&type_rw_lock);
1322 G_WRITE_UNLOCK (&type_rw_lock);
1323 g_warning ("prerequisite `%s' for interface `%s' is neither instantiatable nor interface",
1324 type_descriptive_name_I (prerequisite_type),
1325 type_descriptive_name_I (interface_type));
1329 GType* /* free result */
1330 g_type_interface_prerequisites (GType interface_type,
1331 guint *n_prerequisites)
1335 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
1337 iface = lookup_type_node_I (interface_type);
1341 TypeNode *inode = NULL;
1344 G_READ_LOCK (&type_rw_lock);
1345 types = g_new0 (GType, IFACE_NODE_N_PREREQUISITES (iface) + 1);
1346 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1348 GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
1349 TypeNode *node = lookup_type_node_I (prerequisite);
1350 if (node->is_instantiatable &&
1351 (!inode || type_node_is_a_L (node, inode)))
1354 types[n++] = NODE_TYPE (node);
1357 types[n++] = NODE_TYPE (inode);
1359 if (n_prerequisites)
1360 *n_prerequisites = n;
1361 G_READ_UNLOCK (&type_rw_lock);
1367 if (n_prerequisites)
1368 *n_prerequisites = 0;
1376 type_iface_peek_holder_L (TypeNode *iface,
1377 GType instance_type)
1379 IFaceHolder *iholder;
1381 g_assert (NODE_IS_IFACE (iface));
1383 iholder = iface_node_get_holders_L (iface);
1384 while (iholder && iholder->instance_type != instance_type)
1385 iholder = iholder->next;
1390 type_iface_retrieve_holder_info_Wm (TypeNode *iface,
1391 GType instance_type,
1394 IFaceHolder *iholder = type_iface_peek_holder_L (iface, instance_type);
1396 if (iholder && !iholder->info && need_info)
1398 GInterfaceInfo tmp_info;
1400 g_assert (iholder->plugin != NULL);
1402 type_data_ref_Wm (iface);
1404 INVALID_RECURSION ("g_type_plugin_*", iface->plugin, NODE_NAME (iface));
1406 memset (&tmp_info, 0, sizeof (tmp_info));
1408 G_WRITE_UNLOCK (&type_rw_lock);
1409 g_type_plugin_use (iholder->plugin);
1410 g_type_plugin_complete_interface_info (iholder->plugin, instance_type, NODE_TYPE (iface), &tmp_info);
1411 G_WRITE_LOCK (&type_rw_lock);
1413 INVALID_RECURSION ("g_type_plugin_*", iholder->plugin, NODE_NAME (iface));
1415 check_interface_info_I (iface, instance_type, &tmp_info);
1416 iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
1419 return iholder; /* we don't modify write lock upon returning NULL */
1423 type_iface_blow_holder_info_Wm (TypeNode *iface,
1424 GType instance_type)
1426 IFaceHolder *iholder = iface_node_get_holders_L (iface);
1428 g_assert (NODE_IS_IFACE (iface));
1430 while (iholder->instance_type != instance_type)
1431 iholder = iholder->next;
1433 if (iholder->info && iholder->plugin)
1435 g_free (iholder->info);
1436 iholder->info = NULL;
1438 G_WRITE_UNLOCK (&type_rw_lock);
1439 g_type_plugin_unuse (iholder->plugin);
1440 G_WRITE_LOCK (&type_rw_lock);
1442 type_data_unref_Wm (iface, FALSE);
1446 /* Assumes type's class already exists
1448 static inline size_t
1449 type_total_instance_size_I (TypeNode *node)
1451 gsize total_instance_size;
1453 total_instance_size = node->data->instance.instance_size;
1454 if (node->data->instance.private_size != 0)
1455 total_instance_size = ALIGN_STRUCT (total_instance_size) + node->data->instance.private_size;
1457 return total_instance_size;
1460 /* --- type structure creation/destruction --- */
1464 } InstanceRealClass;
1466 instance_real_class_cmp (gconstpointer p1,
1469 const InstanceRealClass *irc1 = p1;
1470 const InstanceRealClass *irc2 = p2;
1471 guint8 *i1 = irc1->instance;
1472 guint8 *i2 = irc2->instance;
1473 return G_BSEARCH_ARRAY_CMP (i1, i2);
1475 G_LOCK_DEFINE_STATIC (instance_real_class);
1476 static GBSearchArray *instance_real_class_bsa = NULL;
1477 static GBSearchConfig instance_real_class_bconfig = {
1478 sizeof (InstanceRealClass),
1479 instance_real_class_cmp,
1483 instance_real_class_set (gpointer instance,
1486 InstanceRealClass key;
1487 key.instance = instance;
1489 G_LOCK (instance_real_class);
1490 if (!instance_real_class_bsa)
1491 instance_real_class_bsa = g_bsearch_array_create (&instance_real_class_bconfig);
1492 instance_real_class_bsa = g_bsearch_array_replace (instance_real_class_bsa, &instance_real_class_bconfig, &key);
1493 G_UNLOCK (instance_real_class);
1496 instance_real_class_remove (gpointer instance)
1498 InstanceRealClass key, *node;
1500 key.instance = instance;
1501 G_LOCK (instance_real_class);
1502 node = g_bsearch_array_lookup (instance_real_class_bsa, &instance_real_class_bconfig, &key);
1503 index = g_bsearch_array_get_index (instance_real_class_bsa, &instance_real_class_bconfig, node);
1504 instance_real_class_bsa = g_bsearch_array_remove (instance_real_class_bsa, &instance_real_class_bconfig, index);
1505 if (!g_bsearch_array_get_n_nodes (instance_real_class_bsa))
1507 g_bsearch_array_free (instance_real_class_bsa, &instance_real_class_bconfig);
1508 instance_real_class_bsa = NULL;
1510 G_UNLOCK (instance_real_class);
1512 static inline GTypeClass*
1513 instance_real_class_get (gpointer instance)
1515 InstanceRealClass key, *node;
1516 key.instance = instance;
1517 G_LOCK (instance_real_class);
1518 node = instance_real_class_bsa ? g_bsearch_array_lookup (instance_real_class_bsa, &instance_real_class_bconfig, &key) : NULL;
1519 G_UNLOCK (instance_real_class);
1520 return node ? node->class : NULL;
1524 g_type_create_instance (GType type)
1527 GTypeInstance *instance;
1530 gsize total_instance_size;
1532 node = lookup_type_node_I (type);
1533 if (!node || !node->is_instantiatable)
1535 g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
1536 type_descriptive_name_I (type));
1539 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1540 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
1542 g_warning ("cannot create instance of abstract (non-instantiatable) type `%s'",
1543 type_descriptive_name_I (type));
1547 class = g_type_class_ref (type);
1549 total_instance_size = type_total_instance_size_I (node);
1551 if (node->data->instance.n_preallocs)
1553 G_WRITE_LOCK (&type_rw_lock);
1554 if (!node->data->instance.mem_chunk)
1556 /* If there isn't private data, the compiler will have already
1557 * added the necessary padding, but in the private data case, we
1558 * have to pad ourselves to ensure proper alignment of all the
1559 * atoms in the slab.
1561 gsize atom_size = total_instance_size;
1562 if (node->data->instance.private_size)
1563 atom_size = ALIGN_STRUCT (atom_size);
1565 node->data->instance.mem_chunk = g_mem_chunk_new (NODE_NAME (node),
1568 node->data->instance.n_preallocs),
1572 instance = g_chunk_new0 (GTypeInstance, node->data->instance.mem_chunk);
1573 G_WRITE_UNLOCK (&type_rw_lock);
1576 instance = g_malloc0 (total_instance_size); /* fine without read lock */
1578 if (node->data->instance.private_size)
1579 instance_real_class_set (instance, class);
1580 for (i = node->n_supers; i > 0; i--)
1584 pnode = lookup_type_node_I (node->supers[i]);
1585 if (pnode->data->instance.instance_init)
1587 instance->g_class = pnode->data->instance.class;
1588 pnode->data->instance.instance_init (instance, class);
1591 if (node->data->instance.private_size)
1592 instance_real_class_remove (instance);
1594 instance->g_class = class;
1595 if (node->data->instance.instance_init)
1596 node->data->instance.instance_init (instance, class);
1602 g_type_free_instance (GTypeInstance *instance)
1607 g_return_if_fail (instance != NULL && instance->g_class != NULL);
1609 class = instance->g_class;
1610 node = lookup_type_node_I (class->g_type);
1611 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != (gpointer) class)
1613 g_warning ("cannot free instance of invalid (non-instantiatable) type `%s'",
1614 type_descriptive_name_I (class->g_type));
1617 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1618 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (NODE_TYPE (node)))
1620 g_warning ("cannot free instance of abstract (non-instantiatable) type `%s'",
1625 instance->g_class = NULL;
1626 #ifdef G_ENABLE_DEBUG
1627 memset (instance, 0xaa, type_total_instance_size_I (node)); /* debugging hack */
1629 if (node->data->instance.n_preallocs)
1631 G_WRITE_LOCK (&type_rw_lock);
1632 g_chunk_free (instance, node->data->instance.mem_chunk);
1633 G_WRITE_UNLOCK (&type_rw_lock);
1638 g_type_class_unref (class);
1642 type_iface_ensure_dflt_vtable_Wm (TypeNode *iface)
1644 g_assert (iface->data);
1646 if (!iface->data->iface.dflt_vtable)
1648 GTypeInterface *vtable = g_malloc0 (iface->data->iface.vtable_size);
1649 iface->data->iface.dflt_vtable = vtable;
1650 vtable->g_type = NODE_TYPE (iface);
1651 vtable->g_instance_type = 0;
1652 if (iface->data->iface.vtable_init_base ||
1653 iface->data->iface.dflt_init)
1655 G_WRITE_UNLOCK (&type_rw_lock);
1656 if (iface->data->iface.vtable_init_base)
1657 iface->data->iface.vtable_init_base (vtable);
1658 if (iface->data->iface.dflt_init)
1659 iface->data->iface.dflt_init (vtable, (gpointer) iface->data->iface.dflt_data);
1660 G_WRITE_LOCK (&type_rw_lock);
1666 /* This is called to allocate and do the first part of initializing
1667 * the interface vtable; type_iface_vtable_iface_init_Wm() does the remainder.
1669 * A FALSE return indicates that we didn't find an init function for
1670 * this type/iface pair, so the vtable from the parent type should
1671 * be used. Note that the write lock is not modified upon a FALSE
1675 type_iface_vtable_base_init_Wm (TypeNode *iface,
1679 IFaceHolder *iholder;
1680 GTypeInterface *vtable = NULL;
1683 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1684 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), TRUE);
1686 return FALSE; /* we don't modify write lock upon FALSE */
1688 type_iface_ensure_dflt_vtable_Wm (iface);
1690 entry = type_lookup_iface_entry_L (node, iface);
1692 g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
1694 entry->init_state = IFACE_INIT;
1696 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1697 if (pnode) /* want to copy over parent iface contents */
1699 IFaceEntry *pentry = type_lookup_iface_entry_L (pnode, iface);
1702 vtable = g_memdup (pentry->vtable, iface->data->iface.vtable_size);
1705 vtable = g_memdup (iface->data->iface.dflt_vtable, iface->data->iface.vtable_size);
1706 entry->vtable = vtable;
1707 vtable->g_type = NODE_TYPE (iface);
1708 vtable->g_instance_type = NODE_TYPE (node);
1710 if (iface->data->iface.vtable_init_base)
1712 G_WRITE_UNLOCK (&type_rw_lock);
1713 iface->data->iface.vtable_init_base (vtable);
1714 G_WRITE_LOCK (&type_rw_lock);
1716 return TRUE; /* initialized the vtable */
1719 /* Finishes what type_iface_vtable_base_init_Wm started by
1720 * calling the interface init function.
1721 * this function may only be called for types with their
1722 * own interface holder info, i.e. types for which
1723 * g_type_add_interface*() was called and not children thereof.
1726 type_iface_vtable_iface_init_Wm (TypeNode *iface,
1729 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1730 IFaceHolder *iholder = type_iface_peek_holder_L (iface, NODE_TYPE (node));
1731 GTypeInterface *vtable = NULL;
1734 /* iholder->info should have been filled in by type_iface_vtable_base_init_Wm() */
1735 g_assert (iface->data && entry && iholder && iholder->info);
1736 g_assert (entry->init_state == IFACE_INIT); /* assert prior base_init() */
1738 entry->init_state = INITIALIZED;
1740 vtable = entry->vtable;
1742 if (iholder->info->interface_init)
1744 G_WRITE_UNLOCK (&type_rw_lock);
1745 if (iholder->info->interface_init)
1746 iholder->info->interface_init (vtable, iholder->info->interface_data);
1747 G_WRITE_LOCK (&type_rw_lock);
1750 for (i = 0; i < static_n_iface_check_funcs; i++)
1752 GTypeInterfaceCheckFunc check_func = static_iface_check_funcs[i].check_func;
1753 gpointer check_data = static_iface_check_funcs[i].check_data;
1755 G_WRITE_UNLOCK (&type_rw_lock);
1756 check_func (check_data, (gpointer)vtable);
1757 G_WRITE_LOCK (&type_rw_lock);
1762 type_iface_vtable_finalize_Wm (TypeNode *iface,
1764 GTypeInterface *vtable)
1766 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1767 IFaceHolder *iholder;
1769 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1770 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), FALSE);
1772 return FALSE; /* we don't modify write lock upon FALSE */
1774 g_assert (entry && entry->vtable == vtable && iholder->info);
1776 entry->vtable = NULL;
1777 entry->init_state = UNINITIALIZED;
1778 if (iholder->info->interface_finalize || iface->data->iface.vtable_finalize_base)
1780 G_WRITE_UNLOCK (&type_rw_lock);
1781 if (iholder->info->interface_finalize)
1782 iholder->info->interface_finalize (vtable, iholder->info->interface_data);
1783 if (iface->data->iface.vtable_finalize_base)
1784 iface->data->iface.vtable_finalize_base (vtable);
1785 G_WRITE_LOCK (&type_rw_lock);
1788 vtable->g_instance_type = 0;
1791 type_iface_blow_holder_info_Wm (iface, NODE_TYPE (node));
1793 return TRUE; /* write lock modified */
1797 type_class_init_Wm (TypeNode *node,
1800 GSList *slist, *init_slist = NULL;
1803 TypeNode *bnode, *pnode;
1806 g_assert (node->is_classed && node->data &&
1807 node->data->class.class_size &&
1808 !node->data->class.class &&
1809 node->data->class.init_state == UNINITIALIZED);
1811 class = g_malloc0 (node->data->class.class_size);
1812 node->data->class.class = class;
1813 node->data->class.init_state = BASE_CLASS_INIT;
1817 TypeNode *pnode = lookup_type_node_I (pclass->g_type);
1819 memcpy (class, pclass, pnode->data->class.class_size);
1821 if (node->is_instantiatable)
1823 /* We need to initialize the private_size here rather than in
1824 * type_data_make_W() since the class init for the parent
1825 * class may have changed pnode->data->instance.private_size.
1827 node->data->instance.private_size = pnode->data->instance.private_size;
1830 class->g_type = NODE_TYPE (node);
1832 G_WRITE_UNLOCK (&type_rw_lock);
1834 /* stack all base class initialization functions, so we
1835 * call them in ascending order.
1837 for (bnode = node; bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1838 if (bnode->data->class.class_init_base)
1839 init_slist = g_slist_prepend (init_slist, (gpointer) bnode->data->class.class_init_base);
1840 for (slist = init_slist; slist; slist = slist->next)
1842 GBaseInitFunc class_init_base = (GBaseInitFunc) slist->data;
1844 class_init_base (class);
1846 g_slist_free (init_slist);
1848 G_WRITE_LOCK (&type_rw_lock);
1850 node->data->class.init_state = BASE_IFACE_INIT;
1852 /* Before we initialize the class, base initialize all interfaces, either
1853 * from parent, or through our holder info
1855 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1858 while (i < CLASSED_NODE_N_IFACES (node))
1860 entry = &CLASSED_NODE_IFACES_ENTRIES (node)[i];
1861 while (i < CLASSED_NODE_N_IFACES (node) &&
1862 entry->init_state == IFACE_INIT)
1868 if (i == CLASSED_NODE_N_IFACES (node))
1871 if (!type_iface_vtable_base_init_Wm (lookup_type_node_I (entry->iface_type), node))
1875 /* need to get this interface from parent, type_iface_vtable_base_init_Wm()
1876 * doesn't modify write lock upon FALSE, so entry is still valid;
1878 g_assert (pnode != NULL);
1880 for (j = 0; j < CLASSED_NODE_N_IFACES (pnode); j++)
1882 IFaceEntry *pentry = CLASSED_NODE_IFACES_ENTRIES (pnode) + j;
1884 if (pentry->iface_type == entry->iface_type)
1886 entry->vtable = pentry->vtable;
1887 entry->init_state = INITIALIZED;
1891 g_assert (entry->vtable != NULL);
1894 /* If the write lock was released, additional interface entries might
1895 * have been inserted into CLASSED_NODE_IFACES_ENTRIES (node); they'll
1896 * be base-initialized when inserted, so we don't have to worry that
1897 * we might miss them. Uninitialized entries can only be moved higher
1898 * when new ones are inserted.
1903 node->data->class.init_state = CLASS_INIT;
1905 G_WRITE_UNLOCK (&type_rw_lock);
1907 if (node->data->class.class_init)
1908 node->data->class.class_init (class, (gpointer) node->data->class.class_data);
1910 G_WRITE_LOCK (&type_rw_lock);
1912 node->data->class.init_state = IFACE_INIT;
1914 /* finish initializing the interfaces through our holder info.
1915 * inherited interfaces are already init_state == INITIALIZED, because
1916 * they either got setup in the above base_init loop, or during
1917 * class_init from within type_add_interface_Wm() for this or
1918 * an anchestor type.
1923 entry = &CLASSED_NODE_IFACES_ENTRIES (node)[i];
1924 while (i < CLASSED_NODE_N_IFACES (node) &&
1925 entry->init_state == INITIALIZED)
1931 if (i == CLASSED_NODE_N_IFACES (node))
1934 type_iface_vtable_iface_init_Wm (lookup_type_node_I (entry->iface_type), node);
1936 /* As in the loop above, additional initialized entries might be inserted
1937 * if the write lock is released, but that's harmless because the entries
1938 * we need to initialize only move higher in the list.
1943 node->data->class.init_state = INITIALIZED;
1947 type_data_finalize_class_ifaces_Wm (TypeNode *node)
1951 g_assert (node->is_instantiatable && node->data && node->data->class.class && node->data->common.ref_count == 0);
1954 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1956 IFaceEntry *entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1959 if (type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
1961 /* refetch entries, IFACES_ENTRIES might be modified */
1966 /* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
1967 * iface vtable came from parent
1969 entry->vtable = NULL;
1970 entry->init_state = UNINITIALIZED;
1977 type_data_finalize_class_U (TypeNode *node,
1980 GTypeClass *class = cdata->class;
1983 g_assert (cdata->class && cdata->common.ref_count == 0);
1985 if (cdata->class_finalize)
1986 cdata->class_finalize (class, (gpointer) cdata->class_data);
1988 /* call all base class destruction functions in descending order
1990 if (cdata->class_finalize_base)
1991 cdata->class_finalize_base (class);
1992 for (bnode = lookup_type_node_I (NODE_PARENT_TYPE (node)); bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1993 if (bnode->data->class.class_finalize_base)
1994 bnode->data->class.class_finalize_base (class);
1996 g_free (cdata->class);
2000 type_data_last_unref_Wm (GType type,
2003 TypeNode *node = lookup_type_node_I (type);
2005 g_return_if_fail (node != NULL && node->plugin != NULL);
2007 if (!node->data || node->data->common.ref_count == 0)
2009 g_warning ("cannot drop last reference to unreferenced type `%s'",
2010 type_descriptive_name_I (type));
2014 /* call class cache hooks */
2015 if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs && !uncached)
2019 G_WRITE_UNLOCK (&type_rw_lock);
2020 G_READ_LOCK (&type_rw_lock);
2021 for (i = 0; i < static_n_class_cache_funcs; i++)
2023 GTypeClassCacheFunc cache_func = static_class_cache_funcs[i].cache_func;
2024 gpointer cache_data = static_class_cache_funcs[i].cache_data;
2025 gboolean need_break;
2027 G_READ_UNLOCK (&type_rw_lock);
2028 need_break = cache_func (cache_data, node->data->class.class);
2029 G_READ_LOCK (&type_rw_lock);
2030 if (!node->data || node->data->common.ref_count == 0)
2031 INVALID_RECURSION ("GType class cache function ", cache_func, NODE_NAME (node));
2035 G_READ_UNLOCK (&type_rw_lock);
2036 G_WRITE_LOCK (&type_rw_lock);
2039 if (node->data->common.ref_count > 1) /* may have been re-referenced meanwhile */
2040 node->data->common.ref_count -= 1;
2043 GType ptype = NODE_PARENT_TYPE (node);
2046 node->data->common.ref_count = 0;
2048 if (node->is_instantiatable && node->data->instance.mem_chunk)
2050 g_mem_chunk_destroy (node->data->instance.mem_chunk);
2051 node->data->instance.mem_chunk = NULL;
2055 if (node->is_classed && tdata->class.class)
2057 if (CLASSED_NODE_N_IFACES (node))
2058 type_data_finalize_class_ifaces_Wm (node);
2059 node->mutatable_check_cache = FALSE;
2061 G_WRITE_UNLOCK (&type_rw_lock);
2062 type_data_finalize_class_U (node, &tdata->class);
2063 G_WRITE_LOCK (&type_rw_lock);
2065 else if (NODE_IS_IFACE (node) && tdata->iface.dflt_vtable)
2067 node->mutatable_check_cache = FALSE;
2069 if (tdata->iface.dflt_finalize || tdata->iface.vtable_finalize_base)
2071 G_WRITE_UNLOCK (&type_rw_lock);
2072 if (tdata->iface.dflt_finalize)
2073 tdata->iface.dflt_finalize (tdata->iface.dflt_vtable, (gpointer) tdata->iface.dflt_data);
2074 if (tdata->iface.vtable_finalize_base)
2075 tdata->iface.vtable_finalize_base (tdata->iface.dflt_vtable);
2076 G_WRITE_LOCK (&type_rw_lock);
2078 g_free (tdata->iface.dflt_vtable);
2082 node->mutatable_check_cache = FALSE;
2086 /* freeing tdata->common.value_table and its contents is taken care of
2087 * by allocating it in one chunk with tdata
2091 G_WRITE_UNLOCK (&type_rw_lock);
2092 g_type_plugin_unuse (node->plugin);
2093 G_WRITE_LOCK (&type_rw_lock);
2095 type_data_unref_Wm (lookup_type_node_I (ptype), FALSE);
2100 g_type_add_class_cache_func (gpointer cache_data,
2101 GTypeClassCacheFunc cache_func)
2105 g_return_if_fail (cache_func != NULL);
2107 G_WRITE_LOCK (&type_rw_lock);
2108 i = static_n_class_cache_funcs++;
2109 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
2110 static_class_cache_funcs[i].cache_data = cache_data;
2111 static_class_cache_funcs[i].cache_func = cache_func;
2112 G_WRITE_UNLOCK (&type_rw_lock);
2116 g_type_remove_class_cache_func (gpointer cache_data,
2117 GTypeClassCacheFunc cache_func)
2119 gboolean found_it = FALSE;
2122 g_return_if_fail (cache_func != NULL);
2124 G_WRITE_LOCK (&type_rw_lock);
2125 for (i = 0; i < static_n_class_cache_funcs; i++)
2126 if (static_class_cache_funcs[i].cache_data == cache_data &&
2127 static_class_cache_funcs[i].cache_func == cache_func)
2129 static_n_class_cache_funcs--;
2130 g_memmove (static_class_cache_funcs + i,
2131 static_class_cache_funcs + i + 1,
2132 sizeof (static_class_cache_funcs[0]) * (static_n_class_cache_funcs - i));
2133 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
2137 G_WRITE_UNLOCK (&type_rw_lock);
2140 g_warning (G_STRLOC ": cannot remove unregistered class cache func %p with data %p",
2141 cache_func, cache_data);
2146 g_type_add_interface_check (gpointer check_data,
2147 GTypeInterfaceCheckFunc check_func)
2151 g_return_if_fail (check_func != NULL);
2153 G_WRITE_LOCK (&type_rw_lock);
2154 i = static_n_iface_check_funcs++;
2155 static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
2156 static_iface_check_funcs[i].check_data = check_data;
2157 static_iface_check_funcs[i].check_func = check_func;
2158 G_WRITE_UNLOCK (&type_rw_lock);
2162 g_type_remove_interface_check (gpointer check_data,
2163 GTypeInterfaceCheckFunc check_func)
2165 gboolean found_it = FALSE;
2168 g_return_if_fail (check_func != NULL);
2170 G_WRITE_LOCK (&type_rw_lock);
2171 for (i = 0; i < static_n_iface_check_funcs; i++)
2172 if (static_iface_check_funcs[i].check_data == check_data &&
2173 static_iface_check_funcs[i].check_func == check_func)
2175 static_n_iface_check_funcs--;
2176 g_memmove (static_iface_check_funcs + i,
2177 static_iface_check_funcs + i + 1,
2178 sizeof (static_iface_check_funcs[0]) * (static_n_iface_check_funcs - i));
2179 static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
2183 G_WRITE_UNLOCK (&type_rw_lock);
2186 g_warning (G_STRLOC ": cannot remove unregistered class check func %p with data %p",
2187 check_func, check_data);
2190 /* --- type registration --- */
2192 g_type_register_fundamental (GType type_id,
2193 const gchar *type_name,
2194 const GTypeInfo *info,
2195 const GTypeFundamentalInfo *finfo,
2198 GTypeFundamentalInfo *node_finfo;
2201 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2202 g_return_val_if_fail (type_id > 0, 0);
2203 g_return_val_if_fail (type_name != NULL, 0);
2204 g_return_val_if_fail (info != NULL, 0);
2205 g_return_val_if_fail (finfo != NULL, 0);
2207 if (!check_type_name_I (type_name))
2209 if ((type_id & TYPE_ID_MASK) ||
2210 type_id > G_TYPE_FUNDAMENTAL_MAX)
2212 g_warning ("attempt to register fundamental type `%s' with invalid type id (%lu)",
2217 if ((finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
2218 !(finfo->type_flags & G_TYPE_FLAG_CLASSED))
2220 g_warning ("cannot register instantiatable fundamental type `%s' as non-classed",
2224 if (lookup_type_node_I (type_id))
2226 g_warning ("cannot register existing fundamental type `%s' (as `%s')",
2227 type_descriptive_name_I (type_id),
2232 G_WRITE_LOCK (&type_rw_lock);
2233 node = type_node_fundamental_new_W (type_id, type_name, finfo->type_flags);
2234 node_finfo = type_node_fundamental_info_I (node);
2235 type_add_flags_W (node, flags);
2237 if (check_type_info_I (NULL, NODE_FUNDAMENTAL_TYPE (node), type_name, info))
2238 type_data_make_W (node, info,
2239 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
2240 G_WRITE_UNLOCK (&type_rw_lock);
2242 return NODE_TYPE (node);
2246 g_type_register_static (GType parent_type,
2247 const gchar *type_name,
2248 const GTypeInfo *info,
2251 TypeNode *pnode, *node;
2254 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2255 g_return_val_if_fail (parent_type > 0, 0);
2256 g_return_val_if_fail (type_name != NULL, 0);
2257 g_return_val_if_fail (info != NULL, 0);
2259 if (!check_type_name_I (type_name) ||
2260 !check_derivation_I (parent_type, type_name))
2262 if (info->class_finalize)
2264 g_warning ("class finalizer specified for static type `%s'",
2269 pnode = lookup_type_node_I (parent_type);
2270 G_WRITE_LOCK (&type_rw_lock);
2271 type_data_ref_Wm (pnode);
2272 if (check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (pnode), type_name, info))
2274 node = type_node_new_W (pnode, type_name, NULL);
2275 type_add_flags_W (node, flags);
2276 type = NODE_TYPE (node);
2277 type_data_make_W (node, info,
2278 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
2280 G_WRITE_UNLOCK (&type_rw_lock);
2286 g_type_register_dynamic (GType parent_type,
2287 const gchar *type_name,
2288 GTypePlugin *plugin,
2291 TypeNode *pnode, *node;
2294 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2295 g_return_val_if_fail (parent_type > 0, 0);
2296 g_return_val_if_fail (type_name != NULL, 0);
2297 g_return_val_if_fail (plugin != NULL, 0);
2299 if (!check_type_name_I (type_name) ||
2300 !check_derivation_I (parent_type, type_name) ||
2301 !check_plugin_U (plugin, TRUE, FALSE, type_name))
2304 G_WRITE_LOCK (&type_rw_lock);
2305 pnode = lookup_type_node_I (parent_type);
2306 node = type_node_new_W (pnode, type_name, plugin);
2307 type_add_flags_W (node, flags);
2308 type = NODE_TYPE (node);
2309 G_WRITE_UNLOCK (&type_rw_lock);
2315 g_type_add_interface_static (GType instance_type,
2316 GType interface_type,
2317 const GInterfaceInfo *info)
2319 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
2320 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
2321 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
2323 G_WRITE_LOCK (&type_rw_lock);
2324 if (check_add_interface_L (instance_type, interface_type))
2326 TypeNode *node = lookup_type_node_I (instance_type);
2327 TypeNode *iface = lookup_type_node_I (interface_type);
2329 if (check_interface_info_I (iface, NODE_TYPE (node), info))
2330 type_add_interface_Wm (node, iface, info, NULL);
2332 G_WRITE_UNLOCK (&type_rw_lock);
2336 g_type_add_interface_dynamic (GType instance_type,
2337 GType interface_type,
2338 GTypePlugin *plugin)
2342 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
2343 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
2344 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
2346 node = lookup_type_node_I (instance_type);
2347 if (!check_plugin_U (plugin, FALSE, TRUE, NODE_NAME (node)))
2350 G_WRITE_LOCK (&type_rw_lock);
2351 if (check_add_interface_L (instance_type, interface_type))
2353 TypeNode *iface = lookup_type_node_I (interface_type);
2355 type_add_interface_Wm (node, iface, NULL, plugin);
2357 G_WRITE_UNLOCK (&type_rw_lock);
2361 /* --- public API functions --- */
2363 g_type_class_ref (GType type)
2367 /* optimize for common code path
2369 G_WRITE_LOCK (&type_rw_lock);
2370 node = lookup_type_node_I (type);
2371 if (node && node->is_classed && node->data &&
2372 node->data->class.class && node->data->common.ref_count > 0)
2374 type_data_ref_Wm (node);
2375 G_WRITE_UNLOCK (&type_rw_lock);
2377 return node->data->class.class;
2380 if (!node || !node->is_classed ||
2381 (node->data && node->data->common.ref_count < 1))
2383 G_WRITE_UNLOCK (&type_rw_lock);
2384 g_warning ("cannot retrieve class for invalid (unclassed) type `%s'",
2385 type_descriptive_name_I (type));
2389 type_data_ref_Wm (node);
2391 if (!node->data->class.class)
2393 GType ptype = NODE_PARENT_TYPE (node);
2394 GTypeClass *pclass = NULL;
2398 G_WRITE_UNLOCK (&type_rw_lock);
2399 pclass = g_type_class_ref (ptype);
2400 if (node->data->class.class)
2401 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
2402 G_WRITE_LOCK (&type_rw_lock);
2405 type_class_init_Wm (node, pclass);
2407 G_WRITE_UNLOCK (&type_rw_lock);
2409 return node->data->class.class;
2413 g_type_class_unref (gpointer g_class)
2416 GTypeClass *class = g_class;
2418 g_return_if_fail (g_class != NULL);
2420 node = lookup_type_node_I (class->g_type);
2421 G_WRITE_LOCK (&type_rw_lock);
2422 if (node && node->is_classed && node->data &&
2423 node->data->class.class == class && node->data->common.ref_count > 0)
2424 type_data_unref_Wm (node, FALSE);
2426 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2427 type_descriptive_name_I (class->g_type));
2428 G_WRITE_UNLOCK (&type_rw_lock);
2432 g_type_class_unref_uncached (gpointer g_class)
2435 GTypeClass *class = g_class;
2437 g_return_if_fail (g_class != NULL);
2439 G_WRITE_LOCK (&type_rw_lock);
2440 node = lookup_type_node_I (class->g_type);
2441 if (node && node->is_classed && node->data &&
2442 node->data->class.class == class && node->data->common.ref_count > 0)
2443 type_data_unref_Wm (node, TRUE);
2445 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2446 type_descriptive_name_I (class->g_type));
2447 G_WRITE_UNLOCK (&type_rw_lock);
2451 g_type_class_peek (GType type)
2456 node = lookup_type_node_I (type);
2457 G_READ_LOCK (&type_rw_lock);
2458 if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
2459 class = node->data->class.class;
2462 G_READ_UNLOCK (&type_rw_lock);
2468 g_type_class_peek_static (GType type)
2473 node = lookup_type_node_I (type);
2474 G_READ_LOCK (&type_rw_lock);
2475 if (node && node->is_classed && node->data &&
2476 /* peek only static types: */ node->plugin == NULL &&
2477 node->data->class.class) /* common.ref_count _may_ be 0 */
2478 class = node->data->class.class;
2481 G_READ_UNLOCK (&type_rw_lock);
2487 g_type_class_peek_parent (gpointer g_class)
2490 gpointer class = NULL;
2492 g_return_val_if_fail (g_class != NULL, NULL);
2494 node = lookup_type_node_I (G_TYPE_FROM_CLASS (g_class));
2495 /* We used to acquire a read lock here. That is not necessary, since
2496 * parent->data->class.class is constant as long as the derived class
2499 if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
2501 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2502 class = node->data->class.class;
2504 else if (NODE_PARENT_TYPE (node))
2505 g_warning (G_STRLOC ": invalid class pointer `%p'", g_class);
2511 g_type_interface_peek (gpointer instance_class,
2516 gpointer vtable = NULL;
2517 GTypeClass *class = instance_class;
2519 g_return_val_if_fail (instance_class != NULL, NULL);
2521 node = lookup_type_node_I (class->g_type);
2522 iface = lookup_type_node_I (iface_type);
2523 if (node && node->is_instantiatable && iface)
2527 G_READ_LOCK (&type_rw_lock);
2529 entry = type_lookup_iface_entry_L (node, iface);
2530 if (entry && entry->vtable) /* entry is relocatable */
2531 vtable = entry->vtable;
2533 G_READ_UNLOCK (&type_rw_lock);
2536 g_warning (G_STRLOC ": invalid class pointer `%p'", class);
2542 g_type_interface_peek_parent (gpointer g_iface)
2546 gpointer vtable = NULL;
2547 GTypeInterface *iface_class = g_iface;
2549 g_return_val_if_fail (g_iface != NULL, NULL);
2551 iface = lookup_type_node_I (iface_class->g_type);
2552 node = lookup_type_node_I (iface_class->g_instance_type);
2554 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2555 if (node && node->is_instantiatable && iface)
2559 G_READ_LOCK (&type_rw_lock);
2561 entry = type_lookup_iface_entry_L (node, iface);
2562 if (entry && entry->vtable) /* entry is relocatable */
2563 vtable = entry->vtable;
2565 G_READ_UNLOCK (&type_rw_lock);
2568 g_warning (G_STRLOC ": invalid interface pointer `%p'", g_iface);
2574 g_type_default_interface_ref (GType g_type)
2578 G_WRITE_LOCK (&type_rw_lock);
2580 node = lookup_type_node_I (g_type);
2581 if (!node || !NODE_IS_IFACE (node) ||
2582 (node->data && node->data->common.ref_count < 1))
2584 G_WRITE_UNLOCK (&type_rw_lock);
2585 g_warning ("cannot retrieve default vtable for invalid or non-interface type '%s'",
2586 type_descriptive_name_I (g_type));
2590 type_data_ref_Wm (node);
2592 type_iface_ensure_dflt_vtable_Wm (node);
2594 G_WRITE_UNLOCK (&type_rw_lock);
2596 return node->data->iface.dflt_vtable;
2600 g_type_default_interface_peek (GType g_type)
2605 node = lookup_type_node_I (g_type);
2606 G_READ_LOCK (&type_rw_lock);
2607 if (node && NODE_IS_IFACE (node) && node->data && node->data->iface.dflt_vtable)
2608 vtable = node->data->iface.dflt_vtable;
2611 G_READ_UNLOCK (&type_rw_lock);
2617 g_type_default_interface_unref (gpointer g_iface)
2620 GTypeInterface *vtable = g_iface;
2622 g_return_if_fail (g_iface != NULL);
2624 node = lookup_type_node_I (vtable->g_type);
2625 G_WRITE_LOCK (&type_rw_lock);
2626 if (node && NODE_IS_IFACE (node) &&
2627 node->data->iface.dflt_vtable == g_iface &&
2628 node->data->common.ref_count > 0)
2629 type_data_unref_Wm (node, FALSE);
2631 g_warning ("cannot unreference invalid interface default vtable for '%s'",
2632 type_descriptive_name_I (vtable->g_type));
2633 G_WRITE_UNLOCK (&type_rw_lock);
2636 G_CONST_RETURN gchar*
2637 g_type_name (GType type)
2641 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, NULL);
2643 node = lookup_type_node_I (type);
2645 return node ? NODE_NAME (node) : NULL;
2649 g_type_qname (GType type)
2653 node = lookup_type_node_I (type);
2655 return node ? node->qname : 0;
2659 g_type_from_name (const gchar *name)
2664 g_return_val_if_fail (name != NULL, 0);
2666 quark = g_quark_try_string (name);
2669 G_READ_LOCK (&type_rw_lock);
2670 type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
2671 G_READ_UNLOCK (&type_rw_lock);
2678 g_type_parent (GType type)
2682 node = lookup_type_node_I (type);
2684 return node ? NODE_PARENT_TYPE (node) : 0;
2688 g_type_depth (GType type)
2692 node = lookup_type_node_I (type);
2694 return node ? node->n_supers + 1 : 0;
2698 g_type_next_base (GType type,
2704 node = lookup_type_node_I (type);
2707 TypeNode *base_node = lookup_type_node_I (base_type);
2709 if (base_node && base_node->n_supers < node->n_supers)
2711 guint n = node->n_supers - base_node->n_supers;
2713 if (node->supers[n] == base_type)
2714 atype = node->supers[n - 1];
2721 static inline gboolean
2722 type_node_check_conformities_UorL (TypeNode *node,
2723 TypeNode *iface_node,
2724 /* support_inheritance */
2725 gboolean support_interfaces,
2726 gboolean support_prerequisites,
2731 if (/* support_inheritance && */
2732 NODE_IS_ANCESTOR (iface_node, node))
2735 support_interfaces = support_interfaces && node->is_instantiatable && NODE_IS_IFACE (iface_node);
2736 support_prerequisites = support_prerequisites && NODE_IS_IFACE (node);
2738 if (support_interfaces || support_prerequisites)
2741 G_READ_LOCK (&type_rw_lock);
2742 if (support_interfaces && type_lookup_iface_entry_L (node, iface_node))
2744 else if (support_prerequisites && type_lookup_prerequisite_L (node, NODE_TYPE (iface_node)))
2747 G_READ_UNLOCK (&type_rw_lock);
2753 type_node_is_a_L (TypeNode *node,
2754 TypeNode *iface_node)
2756 return type_node_check_conformities_UorL (node, iface_node, TRUE, TRUE, TRUE);
2759 static inline gboolean
2760 type_node_conforms_to_U (TypeNode *node,
2761 TypeNode *iface_node,
2762 gboolean support_interfaces,
2763 gboolean support_prerequisites)
2765 return type_node_check_conformities_UorL (node, iface_node, support_interfaces, support_prerequisites, FALSE);
2769 g_type_is_a (GType type,
2772 TypeNode *node, *iface_node;
2775 node = lookup_type_node_I (type);
2776 iface_node = lookup_type_node_I (iface_type);
2777 is_a = node && iface_node && type_node_conforms_to_U (node, iface_node, TRUE, TRUE);
2782 GType* /* free result */
2783 g_type_children (GType type,
2788 node = lookup_type_node_I (type);
2793 G_READ_LOCK (&type_rw_lock); /* ->children is relocatable */
2794 children = g_new (GType, node->n_children + 1);
2795 memcpy (children, node->children, sizeof (GType) * node->n_children);
2796 children[node->n_children] = 0;
2799 *n_children = node->n_children;
2800 G_READ_UNLOCK (&type_rw_lock);
2813 GType* /* free result */
2814 g_type_interfaces (GType type,
2815 guint *n_interfaces)
2819 node = lookup_type_node_I (type);
2820 if (node && node->is_instantiatable)
2825 G_READ_LOCK (&type_rw_lock);
2826 ifaces = g_new (GType, CLASSED_NODE_N_IFACES (node) + 1);
2827 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
2828 ifaces[i] = CLASSED_NODE_IFACES_ENTRIES (node)[i].iface_type;
2832 *n_interfaces = CLASSED_NODE_N_IFACES (node);
2833 G_READ_UNLOCK (&type_rw_lock);
2846 typedef struct _QData QData;
2858 static inline gpointer
2859 type_get_qdata_L (TypeNode *node,
2862 GData *gdata = node->global_gdata;
2864 if (quark && gdata && gdata->n_qdatas)
2866 QData *qdatas = gdata->qdatas - 1;
2867 guint n_qdatas = gdata->n_qdatas;
2874 i = (n_qdatas + 1) / 2;
2876 if (quark == check->quark)
2878 else if (quark > check->quark)
2883 else /* if (quark < check->quark) */
2892 g_type_get_qdata (GType type,
2898 node = lookup_type_node_I (type);
2901 G_READ_LOCK (&type_rw_lock);
2902 data = type_get_qdata_L (node, quark);
2903 G_READ_UNLOCK (&type_rw_lock);
2907 g_return_val_if_fail (node != NULL, NULL);
2914 type_set_qdata_W (TypeNode *node,
2922 /* setup qdata list if necessary */
2923 if (!node->global_gdata)
2924 node->global_gdata = g_new0 (GData, 1);
2925 gdata = node->global_gdata;
2927 /* try resetting old data */
2928 qdata = gdata->qdatas;
2929 for (i = 0; i < gdata->n_qdatas; i++)
2930 if (qdata[i].quark == quark)
2932 qdata[i].data = data;
2938 gdata->qdatas = g_renew (QData, gdata->qdatas, gdata->n_qdatas);
2939 qdata = gdata->qdatas;
2940 for (i = 0; i < gdata->n_qdatas - 1; i++)
2941 if (qdata[i].quark > quark)
2943 g_memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
2944 qdata[i].quark = quark;
2945 qdata[i].data = data;
2949 g_type_set_qdata (GType type,
2955 g_return_if_fail (quark != 0);
2957 node = lookup_type_node_I (type);
2960 G_WRITE_LOCK (&type_rw_lock);
2961 type_set_qdata_W (node, quark, data);
2962 G_WRITE_UNLOCK (&type_rw_lock);
2965 g_return_if_fail (node != NULL);
2969 type_add_flags_W (TypeNode *node,
2974 g_return_if_fail ((flags & ~TYPE_FLAG_MASK) == 0);
2975 g_return_if_fail (node != NULL);
2977 if ((flags & TYPE_FLAG_MASK) && node->is_classed && node->data && node->data->class.class)
2978 g_warning ("tagging type `%s' as abstract after class initialization", NODE_NAME (node));
2979 dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2981 type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
2985 g_type_query (GType type,
2990 g_return_if_fail (query != NULL);
2992 /* if node is not static and classed, we won't allow query */
2994 node = lookup_type_node_I (type);
2995 if (node && node->is_classed && !node->plugin)
2997 /* type is classed and probably even instantiatable */
2998 G_READ_LOCK (&type_rw_lock);
2999 if (node->data) /* type is static or referenced */
3001 query->type = NODE_TYPE (node);
3002 query->type_name = NODE_NAME (node);
3003 query->class_size = node->data->class.class_size;
3004 query->instance_size = node->is_instantiatable ? node->data->instance.instance_size : 0;
3006 G_READ_UNLOCK (&type_rw_lock);
3011 /* --- implementation details --- */
3013 g_type_test_flags (GType type,
3017 gboolean result = FALSE;
3019 node = lookup_type_node_I (type);
3022 guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
3023 guint tflags = flags & TYPE_FLAG_MASK;
3027 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (node);
3029 fflags = (finfo->type_flags & fflags) == fflags;
3036 G_READ_LOCK (&type_rw_lock);
3037 tflags = (tflags & GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))) == tflags;
3038 G_READ_UNLOCK (&type_rw_lock);
3043 result = tflags && fflags;
3050 g_type_get_plugin (GType type)
3054 node = lookup_type_node_I (type);
3056 return node ? node->plugin : NULL;
3060 g_type_interface_get_plugin (GType instance_type,
3061 GType interface_type)
3066 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL); /* G_TYPE_IS_INTERFACE() is an external call: _U */
3068 node = lookup_type_node_I (instance_type);
3069 iface = lookup_type_node_I (interface_type);
3072 IFaceHolder *iholder;
3073 GTypePlugin *plugin;
3075 G_READ_LOCK (&type_rw_lock);
3077 iholder = iface_node_get_holders_L (iface);
3078 while (iholder && iholder->instance_type != instance_type)
3079 iholder = iholder->next;
3080 plugin = iholder ? iholder->plugin : NULL;
3082 G_READ_UNLOCK (&type_rw_lock);
3087 g_return_val_if_fail (node == NULL, NULL);
3088 g_return_val_if_fail (iface == NULL, NULL);
3090 g_warning (G_STRLOC ": attempt to look up plugin for invalid instance/interface type pair.");
3096 g_type_fundamental_next (void)
3100 G_READ_LOCK (&type_rw_lock);
3101 type = static_fundamental_next;
3102 G_READ_UNLOCK (&type_rw_lock);
3103 type = G_TYPE_MAKE_FUNDAMENTAL (type);
3104 return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
3108 g_type_fundamental (GType type_id)
3110 TypeNode *node = lookup_type_node_I (type_id);
3112 return node ? NODE_FUNDAMENTAL_TYPE (node) : 0;
3116 g_type_check_instance_is_a (GTypeInstance *type_instance,
3119 TypeNode *node, *iface;
3122 if (!type_instance || !type_instance->g_class)
3125 node = lookup_type_node_I (type_instance->g_class->g_type);
3126 iface = lookup_type_node_I (iface_type);
3127 check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
3133 g_type_check_class_is_a (GTypeClass *type_class,
3136 TypeNode *node, *iface;
3142 node = lookup_type_node_I (type_class->g_type);
3143 iface = lookup_type_node_I (is_a_type);
3144 check = node && node->is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
3150 g_type_check_instance_cast (GTypeInstance *type_instance,
3155 if (type_instance->g_class)
3157 TypeNode *node, *iface;
3158 gboolean is_instantiatable, check;
3160 node = lookup_type_node_I (type_instance->g_class->g_type);
3161 is_instantiatable = node && node->is_instantiatable;
3162 iface = lookup_type_node_I (iface_type);
3163 check = is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
3165 return type_instance;
3167 if (is_instantiatable)
3168 g_warning ("invalid cast from `%s' to `%s'",
3169 type_descriptive_name_I (type_instance->g_class->g_type),
3170 type_descriptive_name_I (iface_type));
3172 g_warning ("invalid uninstantiatable type `%s' in cast to `%s'",
3173 type_descriptive_name_I (type_instance->g_class->g_type),
3174 type_descriptive_name_I (iface_type));
3177 g_warning ("invalid unclassed pointer in cast to `%s'",
3178 type_descriptive_name_I (iface_type));
3181 return type_instance;
3185 g_type_check_class_cast (GTypeClass *type_class,
3190 TypeNode *node, *iface;
3191 gboolean is_classed, check;
3193 node = lookup_type_node_I (type_class->g_type);
3194 is_classed = node && node->is_classed;
3195 iface = lookup_type_node_I (is_a_type);
3196 check = is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
3201 g_warning ("invalid class cast from `%s' to `%s'",
3202 type_descriptive_name_I (type_class->g_type),
3203 type_descriptive_name_I (is_a_type));
3205 g_warning ("invalid unclassed type `%s' in class cast to `%s'",
3206 type_descriptive_name_I (type_class->g_type),
3207 type_descriptive_name_I (is_a_type));
3210 g_warning ("invalid class cast from (NULL) pointer to `%s'",
3211 type_descriptive_name_I (is_a_type));
3216 g_type_check_instance (GTypeInstance *type_instance)
3218 /* this function is just here to make the signal system
3219 * conveniently elaborated on instance checks
3223 if (type_instance->g_class)
3225 TypeNode *node = lookup_type_node_I (type_instance->g_class->g_type);
3227 if (node && node->is_instantiatable)
3230 g_warning ("instance of invalid non-instantiatable type `%s'",
3231 type_descriptive_name_I (type_instance->g_class->g_type));
3234 g_warning ("instance with invalid (NULL) class pointer");
3237 g_warning ("invalid (NULL) pointer instance");
3242 static inline gboolean
3243 type_check_is_value_type_U (GType type)
3245 GTypeFlags tflags = G_TYPE_FLAG_VALUE_ABSTRACT;
3248 /* common path speed up */
3249 node = lookup_type_node_I (type);
3250 if (node && node->mutatable_check_cache)
3253 G_READ_LOCK (&type_rw_lock);
3257 if (node->data && node->data->common.ref_count > 0 &&
3258 node->data->common.value_table->value_init)
3259 tflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
3260 else if (NODE_IS_IFACE (node))
3264 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
3266 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
3267 TypeNode *prnode = lookup_type_node_I (prtype);
3269 if (prnode->is_instantiatable)
3272 node = lookup_type_node_I (type);
3278 G_READ_UNLOCK (&type_rw_lock);
3280 return !(tflags & G_TYPE_FLAG_VALUE_ABSTRACT);
3284 g_type_check_is_value_type (GType type)
3286 return type_check_is_value_type_U (type);
3290 g_type_check_value (GValue *value)
3292 return value && type_check_is_value_type_U (value->g_type);
3296 g_type_check_value_holds (GValue *value,
3299 return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
3303 g_type_value_table_peek (GType type)
3305 GTypeValueTable *vtable = NULL;
3306 TypeNode *node = lookup_type_node_I (type);
3307 gboolean has_refed_data, has_table;
3310 /* speed up common code path, we're not 100% safe here,
3311 * but we should only get called with referenced types anyway
3313 data = node ? node->data : NULL;
3314 if (node && node->mutatable_check_cache)
3315 return data->common.value_table;
3317 G_READ_LOCK (&type_rw_lock);
3320 has_refed_data = node && node->data && node->data->common.ref_count;
3321 has_table = has_refed_data && node->data->common.value_table->value_init;
3325 vtable = node->data->common.value_table;
3326 else if (NODE_IS_IFACE (node))
3330 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
3332 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
3333 TypeNode *prnode = lookup_type_node_I (prtype);
3335 if (prnode->is_instantiatable)
3338 node = lookup_type_node_I (type);
3339 goto restart_table_peek;
3345 G_READ_UNLOCK (&type_rw_lock);
3351 g_warning (G_STRLOC ": type id `%lu' is invalid", type);
3352 if (!has_refed_data)
3353 g_warning ("can't peek value table for type `%s' which is not currently referenced",
3354 type_descriptive_name_I (type));
3359 G_CONST_RETURN gchar*
3360 g_type_name_from_instance (GTypeInstance *instance)
3363 return "<NULL-instance>";
3365 return g_type_name_from_class (instance->g_class);
3368 G_CONST_RETURN gchar*
3369 g_type_name_from_class (GTypeClass *g_class)
3372 return "<NULL-class>";
3374 return g_type_name (g_class->g_type);
3378 /* --- initialization --- */
3380 g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
3382 G_LOCK_DEFINE_STATIC (type_init_lock);
3383 const gchar *env_string;
3388 G_LOCK (type_init_lock);
3390 G_WRITE_LOCK (&type_rw_lock);
3392 if (static_quark_type_flags)
3394 G_WRITE_UNLOCK (&type_rw_lock);
3395 G_UNLOCK (type_init_lock);
3399 /* setup GObject library wide debugging flags */
3400 _g_type_debug_flags = debug_flags & G_TYPE_DEBUG_MASK;
3401 env_string = g_getenv ("GOBJECT_DEBUG");
3402 if (env_string != NULL)
3404 static GDebugKey debug_keys[] = {
3405 { "objects", G_TYPE_DEBUG_OBJECTS },
3406 { "signals", G_TYPE_DEBUG_SIGNALS },
3409 _g_type_debug_flags |= g_parse_debug_string (env_string,
3411 sizeof (debug_keys) / sizeof (debug_keys[0]));
3416 static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
3417 static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
3418 static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
3420 /* type qname hash table */
3421 static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
3423 /* invalid type G_TYPE_INVALID (0)
3425 static_fundamental_type_nodes[0] = NULL;
3427 /* void type G_TYPE_NONE
3429 node = type_node_fundamental_new_W (G_TYPE_NONE, "void", 0);
3430 type = NODE_TYPE (node);
3431 g_assert (type == G_TYPE_NONE);
3433 /* interface fundamental type G_TYPE_INTERFACE (!classed)
3435 memset (&info, 0, sizeof (info));
3436 node = type_node_fundamental_new_W (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
3437 type = NODE_TYPE (node);
3438 type_data_make_W (node, &info, NULL);
3439 g_assert (type == G_TYPE_INTERFACE);
3441 G_WRITE_UNLOCK (&type_rw_lock);
3445 /* G_TYPE_TYPE_PLUGIN
3447 g_type_plugin_get_type ();
3449 /* G_TYPE_* value types
3451 g_value_types_init ();
3453 /* G_TYPE_ENUM & G_TYPE_FLAGS
3455 g_enum_types_init ();
3459 g_boxed_type_init ();
3463 g_param_type_init ();
3467 g_object_type_init ();
3469 /* G_TYPE_PARAM_* pspec types
3471 g_param_spec_types_init ();
3473 /* Value Transformations
3475 g_value_transforms_init ();
3481 G_UNLOCK (type_init_lock);
3487 g_type_init_with_debug_flags (0);
3491 g_type_class_add_private (gpointer g_class,
3494 GType instance_type = ((GTypeClass *)g_class)->g_type;
3495 TypeNode *node = lookup_type_node_I (instance_type);
3498 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != g_class)
3500 g_warning ("cannot add private field to invalid (non-instantiatable) type '%s'",
3501 type_descriptive_name_I (instance_type));
3505 if (NODE_PARENT_TYPE (node))
3507 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
3508 if (node->data->instance.private_size != pnode->data->instance.private_size)
3510 g_warning ("g_type_add_private() called multiple times for the same type");
3515 G_WRITE_LOCK (&type_rw_lock);
3517 offset = ALIGN_STRUCT (node->data->instance.private_size);
3518 node->data->instance.private_size = offset + private_size;
3520 G_WRITE_UNLOCK (&type_rw_lock);
3524 g_type_instance_get_private (GTypeInstance *instance,
3527 TypeNode *instance_node;
3528 TypeNode *private_node;
3529 TypeNode *parent_node;
3533 g_return_val_if_fail (instance != NULL && instance->g_class != NULL, NULL);
3535 /* while instances are initialized, their class pointers change,
3536 * so figure the instances real class first
3538 class = instance_real_class_get (instance);
3540 class = instance->g_class;
3542 instance_node = lookup_type_node_I (class->g_type);
3543 if (G_UNLIKELY (!instance_node || !instance_node->is_instantiatable))
3545 g_warning ("instance of invalid non-instantiatable type `%s'",
3546 type_descriptive_name_I (instance->g_class->g_type));
3550 private_node = lookup_type_node_I (private_type);
3551 if (G_UNLIKELY (!private_node || !NODE_IS_ANCESTOR (private_node, instance_node)))
3553 g_warning ("attempt to retrieve private data for invalid type '%s'",
3554 type_descriptive_name_I (private_type));
3558 /* Note that we don't need a read lock, since instance existing
3559 * means that the instance class and all parent classes
3560 * exist, so the node->data, node->data->instance.instance_size,
3561 * and node->data->instance.private_size are not going to be changed.
3562 * for any of the relevant types.
3565 offset = ALIGN_STRUCT (instance_node->data->instance.instance_size);
3567 if (NODE_PARENT_TYPE (private_node))
3569 parent_node = lookup_type_node_I (NODE_PARENT_TYPE (private_node));
3570 g_assert (parent_node->data && parent_node->data->common.ref_count);
3572 if (G_UNLIKELY (private_node->data->instance.private_size == parent_node->data->instance.private_size))
3574 g_warning ("g_type_get_private() requires a prior call to g_type_add_private()");
3578 offset += ALIGN_STRUCT (parent_node->data->instance.private_size);
3581 return G_STRUCT_MEMBER_P (instance, offset);