1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
26 #include "gtypeplugin.h"
27 #include "gvaluecollector.h"
28 #include "gbsearcharray.h"
32 /* NOTE: some functions (some internal variants and exported ones)
33 * invalidate data portions of the TypeNodes. if external functions/callbacks
34 * are called, pointers to memory maintained by TypeNodes have to be looked up
35 * again. this affects most of the struct TypeNode fields, e.g. ->children or
36 * CLASSED_NODE_IFACES_ENTRIES() respectively IFACE_NODE_PREREQUISITES() (but
37 * not ->supers[]), as all those memory portions can get realloc()ed during
38 * callback invocation.
41 * - g_type_from_name() should do an ordered array lookup after fetching the
42 * the quark, instead of a second hashtable lookup.
45 * lock handling issues when calling static functions are indicated by
46 * uppercase letter postfixes, all static functions have to have
47 * one of the below postfixes:
48 * - _I: [Indifferent about locking]
49 * function doesn't care about locks at all
50 * - _U: [Unlocked invocation]
51 * no read or write lock has to be held across function invocation
52 * (locks may be acquired and released during invocation though)
53 * - _L: [Locked invocation]
54 * a write lock or more than 0 read locks have to be held across
56 * - _W: [Write-locked invocation]
57 * a write lock has to be held across function invokation
58 * - _Wm: [Write-locked invocation, mutatable]
59 * like _W, but the write lock might be released and reacquired
60 * during invocation, watch your pointers
63 static GStaticRWLock type_rw_lock = G_STATIC_RW_LOCK_INIT;
65 #define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_static_rw_lock_reader_lock (rw_lock); } while (0)
66 #define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_static_rw_lock_reader_unlock (rw_lock); } while (0)
67 #define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_static_rw_lock_writer_lock (rw_lock); } while (0)
68 #define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_static_rw_lock_writer_unlock (rw_lock); } while (0)
70 #define G_READ_LOCK(rw_lock) g_static_rw_lock_reader_lock (rw_lock)
71 #define G_READ_UNLOCK(rw_lock) g_static_rw_lock_reader_unlock (rw_lock)
72 #define G_WRITE_LOCK(rw_lock) g_static_rw_lock_writer_lock (rw_lock)
73 #define G_WRITE_UNLOCK(rw_lock) g_static_rw_lock_writer_unlock (rw_lock)
75 #define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
76 static const gchar *_action = " invalidly modified type "; \
77 gpointer _arg = (gpointer) (arg); const gchar *_tname = (type_name), *_fname = (func); \
79 g_error ("%s(%p)%s`%s'", _fname, _arg, _action, _tname); \
81 g_error ("%s()%s`%s'", _fname, _action, _tname); \
83 #define g_return_val_if_uninitialized(condition, init_function, return_value) G_STMT_START{ \
86 g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
87 "%s: initialization assertion failed, use %s() prior to this function", \
88 G_STRLOC, G_STRINGIFY (init_function)); \
89 return (return_value); \
94 #define DEBUG_CODE(debug_type, code_block) G_STMT_START { \
95 if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) \
98 #else /* !G_ENABLE_DEBUG */
99 #define DEBUG_CODE(debug_type, code_block) /* code_block */
100 #endif /* G_ENABLE_DEBUG */
102 #define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
103 G_TYPE_FLAG_INSTANTIATABLE | \
104 G_TYPE_FLAG_DERIVABLE | \
105 G_TYPE_FLAG_DEEP_DERIVABLE)
106 #define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT)
107 #define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
108 sizeof (gpointer)), \
111 /* The 2*sizeof(size_t) alignment here is borrowed from
112 * GNU libc, so it should be good most everywhere.
113 * It is more conservative than is needed on some 64-bit
114 * platforms, but ia64 does require a 16-byte alignment.
115 * The SIMD extensions for x86 and ppc32 would want a
116 * larger alignment than this, but we don't need to
117 * do better than malloc.
119 #define STRUCT_ALIGNMENT (2 * sizeof (gsize))
120 #define ALIGN_STRUCT(offset) \
121 ((offset + (STRUCT_ALIGNMENT - 1)) & -STRUCT_ALIGNMENT)
124 /* --- typedefs --- */
125 typedef struct _TypeNode TypeNode;
126 typedef struct _CommonData CommonData;
127 typedef struct _IFaceData IFaceData;
128 typedef struct _ClassData ClassData;
129 typedef struct _InstanceData InstanceData;
130 typedef union _TypeData TypeData;
131 typedef struct _IFaceEntry IFaceEntry;
132 typedef struct _IFaceHolder IFaceHolder;
135 /* --- prototypes --- */
136 static inline GTypeFundamentalInfo* type_node_fundamental_info_I (TypeNode *node);
137 static void type_add_flags_W (TypeNode *node,
139 static void type_data_make_W (TypeNode *node,
140 const GTypeInfo *info,
141 const GTypeValueTable *value_table);
142 static inline void type_data_ref_Wm (TypeNode *node);
143 static inline void type_data_unref_Wm (TypeNode *node,
145 static void type_data_last_unref_Wm (GType type,
147 static inline gpointer type_get_qdata_L (TypeNode *node,
149 static inline void type_set_qdata_W (TypeNode *node,
152 static IFaceHolder* type_iface_peek_holder_L (TypeNode *iface,
153 GType instance_type);
154 static gboolean type_iface_vtable_base_init_Wm (TypeNode *iface,
156 static void type_iface_vtable_iface_init_Wm (TypeNode *iface,
158 static gboolean type_node_is_a_L (TypeNode *node,
159 TypeNode *iface_node);
162 /* --- enumeration --- */
164 /* The InitState enumeration is used to track the progress of initializing
165 * both classes and interface vtables. Keeping the state of initialization
166 * is necessary to handle new interfaces being added while we are initializing
167 * the class or other interfaces.
179 /* --- structures --- */
183 guint n_children : 12;
185 guint _prot_n_ifaces_prerequisites : 9;
186 guint is_classed : 1;
187 guint is_instantiatable : 1;
188 guint mutatable_check_cache : 1; /* combines some common path checks */
190 TypeData * volatile data;
194 IFaceEntry *iface_entries; /* for !iface types */
195 GType *prerequisistes;
197 GType supers[1]; /* flexible array */
199 #define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
200 #define MAX_N_SUPERS (255)
201 #define MAX_N_CHILDREN (4095)
202 #define MAX_N_IFACES (511)
203 #define MAX_N_PREREQUISITES (MAX_N_IFACES)
204 #define NODE_TYPE(node) (node->supers[0])
205 #define NODE_PARENT_TYPE(node) (node->supers[1])
206 #define NODE_FUNDAMENTAL_TYPE(node) (node->supers[node->n_supers])
207 #define NODE_NAME(node) (g_quark_to_string (node->qname))
208 #define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
209 #define CLASSED_NODE_N_IFACES(node) ((node)->_prot_n_ifaces_prerequisites)
210 #define CLASSED_NODE_IFACES_ENTRIES(node) ((node)->_prot.iface_entries)
211 #define IFACE_NODE_N_PREREQUISITES(node) ((node)->_prot_n_ifaces_prerequisites)
212 #define IFACE_NODE_PREREQUISITES(node) ((node)->_prot.prerequisistes)
213 #define iface_node_get_holders_L(node) ((IFaceHolder*) type_get_qdata_L ((node), static_quark_iface_holder))
214 #define iface_node_set_holders_W(node, holders) (type_set_qdata_W ((node), static_quark_iface_holder, (holders)))
215 #define iface_node_get_dependants_array_L(n) ((GType*) type_get_qdata_L ((n), static_quark_dependants_array))
216 #define iface_node_set_dependants_array_W(n,d) (type_set_qdata_W ((n), static_quark_dependants_array, (d)))
217 #define TYPE_ID_MASK ((GType) ((1 << G_TYPE_FUNDAMENTAL_SHIFT) - 1))
219 #define NODE_IS_ANCESTOR(ancestor, node) \
220 ((ancestor)->n_supers <= (node)->n_supers && \
221 (node)->supers[(node)->n_supers - (ancestor)->n_supers] == NODE_TYPE (ancestor))
227 GInterfaceInfo *info;
234 GTypeInterface *vtable;
235 InitState init_state;
240 GTypeValueTable *value_table;
246 GBaseInitFunc vtable_init_base;
247 GBaseFinalizeFunc vtable_finalize_base;
248 GClassInitFunc dflt_init;
249 GClassFinalizeFunc dflt_finalize;
250 gconstpointer dflt_data;
251 gpointer dflt_vtable;
257 guint init_state : 4;
258 GBaseInitFunc class_init_base;
259 GBaseFinalizeFunc class_finalize_base;
260 GClassInitFunc class_init;
261 GClassFinalizeFunc class_finalize;
262 gconstpointer class_data;
269 guint init_state : 4;
270 GBaseInitFunc class_init_base;
271 GBaseFinalizeFunc class_finalize_base;
272 GClassInitFunc class_init;
273 GClassFinalizeFunc class_finalize;
274 gconstpointer class_data;
276 guint16 instance_size;
277 guint16 private_size;
279 GInstanceInitFunc instance_init;
280 GMemChunk *mem_chunk;
287 InstanceData instance;
291 GTypeClassCacheFunc cache_func;
295 GTypeInterfaceCheckFunc check_func;
299 /* --- variables --- */
300 static guint static_n_class_cache_funcs = 0;
301 static ClassCacheFunc *static_class_cache_funcs = NULL;
302 static guint static_n_iface_check_funcs = 0;
303 static IFaceCheckFunc *static_iface_check_funcs = NULL;
304 static GQuark static_quark_type_flags = 0;
305 static GQuark static_quark_iface_holder = 0;
306 static GQuark static_quark_dependants_array = 0;
307 GTypeDebugFlags _g_type_debug_flags = 0;
310 /* --- type nodes --- */
311 static GHashTable *static_type_nodes_ht = NULL;
312 static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { 0, };
313 static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
315 static inline TypeNode*
316 lookup_type_node_I (register GType utype)
318 if (utype > G_TYPE_FUNDAMENTAL_MAX)
319 return (TypeNode*) (utype & ~TYPE_ID_MASK);
321 return static_fundamental_type_nodes[utype >> G_TYPE_FUNDAMENTAL_SHIFT];
325 type_node_any_new_W (TypeNode *pnode,
329 GTypeFundamentalFlags type_flags)
334 guint i, node_size = 0;
336 n_supers = pnode ? pnode->n_supers + 1 : 0;
339 node_size += SIZEOF_FUNDAMENTAL_INFO; /* fundamental type info */
340 node_size += SIZEOF_BASE_TYPE_NODE (); /* TypeNode structure */
341 node_size += (sizeof (GType) * (1 + n_supers + 1)); /* self + ancestors + (0) for ->supers[] */
342 node = g_malloc0 (node_size);
343 if (!pnode) /* offset fundamental types */
345 node = G_STRUCT_MEMBER_P (node, SIZEOF_FUNDAMENTAL_INFO);
346 static_fundamental_type_nodes[ftype >> G_TYPE_FUNDAMENTAL_SHIFT] = node;
352 g_assert ((type & TYPE_ID_MASK) == 0);
354 node->n_supers = n_supers;
357 node->supers[0] = type;
360 node->is_classed = (type_flags & G_TYPE_FLAG_CLASSED) != 0;
361 node->is_instantiatable = (type_flags & G_TYPE_FLAG_INSTANTIATABLE) != 0;
363 if (NODE_IS_IFACE (node))
365 IFACE_NODE_N_PREREQUISITES (node) = 0;
366 IFACE_NODE_PREREQUISITES (node) = NULL;
370 CLASSED_NODE_N_IFACES (node) = 0;
371 CLASSED_NODE_IFACES_ENTRIES (node) = NULL;
376 node->supers[0] = type;
377 memcpy (node->supers + 1, pnode->supers, sizeof (GType) * (1 + pnode->n_supers + 1));
379 node->is_classed = pnode->is_classed;
380 node->is_instantiatable = pnode->is_instantiatable;
382 if (NODE_IS_IFACE (node))
384 IFACE_NODE_N_PREREQUISITES (node) = 0;
385 IFACE_NODE_PREREQUISITES (node) = NULL;
391 CLASSED_NODE_N_IFACES (node) = CLASSED_NODE_N_IFACES (pnode);
392 CLASSED_NODE_IFACES_ENTRIES (node) = g_memdup (CLASSED_NODE_IFACES_ENTRIES (pnode),
393 sizeof (CLASSED_NODE_IFACES_ENTRIES (pnode)[0]) *
394 CLASSED_NODE_N_IFACES (node));
395 for (j = 0; j < CLASSED_NODE_N_IFACES (node); j++)
397 CLASSED_NODE_IFACES_ENTRIES (node)[j].vtable = NULL;
398 CLASSED_NODE_IFACES_ENTRIES (node)[j].init_state = UNINITIALIZED;
402 i = pnode->n_children++;
403 pnode->children = g_renew (GType, pnode->children, pnode->n_children);
404 pnode->children[i] = type;
407 node->plugin = plugin;
408 node->n_children = 0;
409 node->children = NULL;
411 node->qname = g_quark_from_string (name);
412 node->global_gdata = NULL;
414 g_hash_table_insert (static_type_nodes_ht,
415 GUINT_TO_POINTER (node->qname),
420 static inline GTypeFundamentalInfo*
421 type_node_fundamental_info_I (TypeNode *node)
423 GType ftype = NODE_FUNDAMENTAL_TYPE (node);
425 if (ftype != NODE_TYPE (node))
426 node = lookup_type_node_I (ftype);
428 return node ? G_STRUCT_MEMBER_P (node, -SIZEOF_FUNDAMENTAL_INFO) : NULL;
432 type_node_fundamental_new_W (GType ftype,
434 GTypeFundamentalFlags type_flags)
436 GTypeFundamentalInfo *finfo;
439 g_assert ((ftype & TYPE_ID_MASK) == 0);
440 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX);
442 if (ftype >> G_TYPE_FUNDAMENTAL_SHIFT == static_fundamental_next)
443 static_fundamental_next++;
445 type_flags &= TYPE_FUNDAMENTAL_FLAG_MASK;
447 node = type_node_any_new_W (NULL, ftype, name, NULL, type_flags);
449 finfo = type_node_fundamental_info_I (node);
450 finfo->type_flags = type_flags;
456 type_node_new_W (TypeNode *pnode,
462 g_assert (pnode->n_supers < MAX_N_SUPERS);
463 g_assert (pnode->n_children < MAX_N_CHILDREN);
465 return type_node_any_new_W (pnode, NODE_FUNDAMENTAL_TYPE (pnode), name, plugin, 0);
468 static inline IFaceEntry*
469 type_lookup_iface_entry_L (TypeNode *node,
470 TypeNode *iface_node)
472 if (NODE_IS_IFACE (iface_node) && CLASSED_NODE_N_IFACES (node))
474 IFaceEntry *ifaces = CLASSED_NODE_IFACES_ENTRIES (node) - 1;
475 guint n_ifaces = CLASSED_NODE_N_IFACES (node);
476 GType iface_type = NODE_TYPE (iface_node);
483 i = (n_ifaces + 1) >> 1;
485 if (iface_type == check->iface_type)
487 else if (iface_type > check->iface_type)
492 else /* if (iface_type < check->iface_type) */
501 static inline gboolean
502 type_lookup_prerequisite_L (TypeNode *iface,
503 GType prerequisite_type)
505 if (NODE_IS_IFACE (iface) && IFACE_NODE_N_PREREQUISITES (iface))
507 GType *prerequisites = IFACE_NODE_PREREQUISITES (iface) - 1;
508 guint n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
515 i = (n_prerequisites + 1) >> 1;
516 check = prerequisites + i;
517 if (prerequisite_type == *check)
519 else if (prerequisite_type > *check)
521 n_prerequisites -= i;
522 prerequisites = check;
524 else /* if (prerequisite_type < *check) */
525 n_prerequisites = i - 1;
527 while (n_prerequisites);
533 type_descriptive_name_I (GType type)
537 TypeNode *node = lookup_type_node_I (type);
539 return node ? NODE_NAME (node) : "<unknown>";
546 /* --- type consistency checks --- */
548 check_plugin_U (GTypePlugin *plugin,
549 gboolean need_complete_type_info,
550 gboolean need_complete_interface_info,
551 const gchar *type_name)
553 /* G_IS_TYPE_PLUGIN() and G_TYPE_PLUGIN_GET_CLASS() are external calls: _U
557 g_warning ("plugin handle for type `%s' is NULL",
561 if (!G_IS_TYPE_PLUGIN (plugin))
563 g_warning ("plugin pointer (%p) for type `%s' is invalid",
567 if (need_complete_type_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_type_info)
569 g_warning ("plugin for type `%s' has no complete_type_info() implementation",
573 if (need_complete_interface_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_interface_info)
575 g_warning ("plugin for type `%s' has no complete_interface_info() implementation",
583 check_type_name_I (const gchar *type_name)
585 static const gchar *extra_chars = "-_+";
586 const gchar *p = type_name;
589 if (!type_name[0] || !type_name[1] || !type_name[2])
591 g_warning ("type name `%s' is too short", type_name);
594 /* check the first letter */
595 name_valid = (p[0] >= 'A' && p[0] <= 'Z') || (p[0] >= 'a' && p[0] <= 'z') || p[0] == '_';
596 for (p = type_name + 1; *p; p++)
597 name_valid &= ((p[0] >= 'A' && p[0] <= 'Z') ||
598 (p[0] >= 'a' && p[0] <= 'z') ||
599 (p[0] >= '0' && p[0] <= '9') ||
600 strchr (extra_chars, p[0]));
603 g_warning ("type name `%s' contains invalid characters", type_name);
606 if (g_type_from_name (type_name))
608 g_warning ("cannot register existing type `%s'", type_name);
616 check_derivation_I (GType parent_type,
617 const gchar *type_name)
620 GTypeFundamentalInfo* finfo;
622 pnode = lookup_type_node_I (parent_type);
625 g_warning ("cannot derive type `%s' from invalid parent type `%s'",
627 type_descriptive_name_I (parent_type));
630 finfo = type_node_fundamental_info_I (pnode);
631 /* ensure flat derivability */
632 if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
634 g_warning ("cannot derive `%s' from non-derivable parent type `%s'",
639 /* ensure deep derivability */
640 if (parent_type != NODE_FUNDAMENTAL_TYPE (pnode) &&
641 !(finfo->type_flags & G_TYPE_FLAG_DEEP_DERIVABLE))
643 g_warning ("cannot derive `%s' from non-fundamental parent type `%s'",
653 check_collect_format_I (const gchar *collect_format)
655 const gchar *p = collect_format;
656 gchar valid_format[] = { G_VALUE_COLLECT_INT, G_VALUE_COLLECT_LONG,
657 G_VALUE_COLLECT_INT64, G_VALUE_COLLECT_DOUBLE,
658 G_VALUE_COLLECT_POINTER, 0 };
661 if (!strchr (valid_format, *p++))
663 return p - collect_format <= G_VALUE_COLLECT_FORMAT_MAX_LENGTH;
667 check_value_table_I (const gchar *type_name,
668 const GTypeValueTable *value_table)
672 else if (value_table->value_init == NULL)
674 if (value_table->value_free || value_table->value_copy ||
675 value_table->value_peek_pointer ||
676 value_table->collect_format || value_table->collect_value ||
677 value_table->lcopy_format || value_table->lcopy_value)
678 g_warning ("cannot handle uninitializable values of type `%s'",
682 else /* value_table->value_init != NULL */
684 if (!value_table->value_free)
687 * g_warning ("missing `value_free()' for type `%s'", type_name);
691 if (!value_table->value_copy)
693 g_warning ("missing `value_copy()' for type `%s'", type_name);
696 if ((value_table->collect_format || value_table->collect_value) &&
697 (!value_table->collect_format || !value_table->collect_value))
699 g_warning ("one of `collect_format' and `collect_value()' is unspecified for type `%s'",
703 if (value_table->collect_format && !check_collect_format_I (value_table->collect_format))
705 g_warning ("the `%s' specification for type `%s' is too long or invalid",
710 if ((value_table->lcopy_format || value_table->lcopy_value) &&
711 (!value_table->lcopy_format || !value_table->lcopy_value))
713 g_warning ("one of `lcopy_format' and `lcopy_value()' is unspecified for type `%s'",
717 if (value_table->lcopy_format && !check_collect_format_I (value_table->lcopy_format))
719 g_warning ("the `%s' specification for type `%s' is too long or invalid",
729 check_type_info_I (TypeNode *pnode,
731 const gchar *type_name,
732 const GTypeInfo *info)
734 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (lookup_type_node_I (ftype));
735 gboolean is_interface = ftype == G_TYPE_INTERFACE;
737 g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX && !(ftype & TYPE_ID_MASK));
739 /* check instance members */
740 if (!(finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
741 (info->instance_size || info->n_preallocs || info->instance_init))
744 g_warning ("cannot instantiate `%s', derived from non-instantiatable parent type `%s'",
748 g_warning ("cannot instantiate `%s' as non-instantiatable fundamental",
752 /* check class & interface members */
753 if (!((finfo->type_flags & G_TYPE_FLAG_CLASSED) || is_interface) &&
754 (info->class_init || info->class_finalize || info->class_data ||
755 info->class_size || info->base_init || info->base_finalize))
758 g_warning ("cannot create class for `%s', derived from non-classed parent type `%s'",
762 g_warning ("cannot create class for `%s' as non-classed fundamental",
766 /* check interface size */
767 if (is_interface && info->class_size < sizeof (GTypeInterface))
769 g_warning ("specified interface size for type `%s' is smaller than `GTypeInterface' size",
773 /* check class size */
774 if (finfo->type_flags & G_TYPE_FLAG_CLASSED)
776 if (info->class_size < sizeof (GTypeClass))
778 g_warning ("specified class size for type `%s' is smaller than `GTypeClass' size",
782 if (pnode && info->class_size < pnode->data->class.class_size)
784 g_warning ("specified class size for type `%s' is smaller "
785 "than the parent type's `%s' class size",
791 /* check instance size */
792 if (finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE)
794 if (info->instance_size < sizeof (GTypeInstance))
796 g_warning ("specified instance size for type `%s' is smaller than `GTypeInstance' size",
800 if (pnode && info->instance_size < pnode->data->instance.instance_size)
802 g_warning ("specified instance size for type `%s' is smaller "
803 "than the parent type's `%s' instance size",
814 find_conforming_child_type_L (TypeNode *pnode,
817 TypeNode *node = NULL;
820 if (type_lookup_iface_entry_L (pnode, iface))
823 for (i = 0; i < pnode->n_children && !node; i++)
824 node = find_conforming_child_type_L (lookup_type_node_I (pnode->children[i]), iface);
830 check_add_interface_L (GType instance_type,
833 TypeNode *node = lookup_type_node_I (instance_type);
834 TypeNode *iface = lookup_type_node_I (iface_type);
837 GType *prerequisites;
841 if (!node || !node->is_instantiatable)
843 g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
844 type_descriptive_name_I (instance_type));
847 if (!iface || !NODE_IS_IFACE (iface))
849 g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
850 type_descriptive_name_I (iface_type),
854 tnode = lookup_type_node_I (NODE_PARENT_TYPE (iface));
855 if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry_L (node, tnode))
857 /* 2001/7/31:timj: erk, i guess this warning is junk as interface derivation is flat */
858 g_warning ("cannot add sub-interface `%s' to type `%s' which does not conform to super-interface `%s'",
864 /* allow overriding of interface type introduced for parent type */
865 entry = type_lookup_iface_entry_L (node, iface);
866 if (entry && entry->vtable == NULL && !type_iface_peek_holder_L (iface, NODE_TYPE (node)))
868 /* ok, we do conform to this interface already, but the interface vtable was not
869 * yet intialized, and we just conform to the interface because it got added to
870 * one of our parents. so we allow overriding of holder info here.
874 /* check whether one of our children already conforms (or whether the interface
875 * got added to this node already)
877 tnode = find_conforming_child_type_L (node, iface); /* tnode is_a node */
880 g_warning ("cannot add interface type `%s' to type `%s', since type `%s' already conforms to interface",
886 prerequisites = IFACE_NODE_PREREQUISITES (iface);
887 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
889 tnode = lookup_type_node_I (prerequisites[i]);
890 if (!type_node_is_a_L (node, tnode))
892 g_warning ("cannot add interface type `%s' to type `%s' which does not conform to prerequisite `%s'",
903 check_interface_info_I (TypeNode *iface,
905 const GInterfaceInfo *info)
907 if ((info->interface_finalize || info->interface_data) && !info->interface_init)
909 g_warning ("interface type `%s' for type `%s' comes without initializer",
911 type_descriptive_name_I (instance_type));
918 /* --- type info (type node data) --- */
920 type_data_make_W (TypeNode *node,
921 const GTypeInfo *info,
922 const GTypeValueTable *value_table)
925 GTypeValueTable *vtable = NULL;
926 guint vtable_size = 0;
928 g_assert (node->data == NULL && info != NULL);
932 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
935 vtable = pnode->data->common.value_table;
938 static const GTypeValueTable zero_vtable = { NULL, };
940 value_table = &zero_vtable;
945 /* need to setup vtable_size since we have to allocate it with data in one chunk */
946 vtable_size = sizeof (GTypeValueTable);
947 if (value_table->collect_format)
948 vtable_size += strlen (value_table->collect_format);
949 if (value_table->lcopy_format)
950 vtable_size += strlen (value_table->lcopy_format);
954 if (node->is_instantiatable) /* carefull, is_instantiatable is also is_classed */
956 data = g_malloc0 (sizeof (InstanceData) + vtable_size);
958 vtable = G_STRUCT_MEMBER_P (data, sizeof (InstanceData));
959 data->instance.class_size = info->class_size;
960 data->instance.class_init_base = info->base_init;
961 data->instance.class_finalize_base = info->base_finalize;
962 data->instance.class_init = info->class_init;
963 data->instance.class_finalize = info->class_finalize;
964 data->instance.class_data = info->class_data;
965 data->instance.class = NULL;
966 data->instance.init_state = UNINITIALIZED;
967 data->instance.instance_size = info->instance_size;
968 /* We'll set the final value for data->instance.private size
969 * after the parent class has been initialized
971 data->instance.private_size = 0;
972 #ifdef DISABLE_MEM_POOLS
973 data->instance.n_preallocs = 0;
974 #else /* !DISABLE_MEM_POOLS */
975 data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
976 #endif /* !DISABLE_MEM_POOLS */
977 data->instance.instance_init = info->instance_init;
978 data->instance.mem_chunk = NULL;
980 else if (node->is_classed) /* only classed */
982 data = g_malloc0 (sizeof (ClassData) + vtable_size);
984 vtable = G_STRUCT_MEMBER_P (data, sizeof (ClassData));
985 data->class.class_size = info->class_size;
986 data->class.class_init_base = info->base_init;
987 data->class.class_finalize_base = info->base_finalize;
988 data->class.class_init = info->class_init;
989 data->class.class_finalize = info->class_finalize;
990 data->class.class_data = info->class_data;
991 data->class.class = NULL;
992 data->class.init_state = UNINITIALIZED;
994 else if (NODE_IS_IFACE (node))
996 data = g_malloc0 (sizeof (IFaceData) + vtable_size);
998 vtable = G_STRUCT_MEMBER_P (data, sizeof (IFaceData));
999 data->iface.vtable_size = info->class_size;
1000 data->iface.vtable_init_base = info->base_init;
1001 data->iface.vtable_finalize_base = info->base_finalize;
1002 data->iface.dflt_init = info->class_init;
1003 data->iface.dflt_finalize = info->class_finalize;
1004 data->iface.dflt_data = info->class_data;
1005 data->iface.dflt_vtable = NULL;
1009 data = g_malloc0 (sizeof (CommonData) + vtable_size);
1011 vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
1015 node->data->common.ref_count = 1;
1021 /* we allocate the vtable and its strings together with the type data, so
1022 * children can take over their parent's vtable pointer, and we don't
1023 * need to worry freeing it or not when the child data is destroyed
1025 *vtable = *value_table;
1026 p = G_STRUCT_MEMBER_P (vtable, sizeof (*vtable));
1028 vtable->collect_format = p;
1029 if (value_table->collect_format)
1031 strcat (p, value_table->collect_format);
1032 p += strlen (value_table->collect_format);
1036 vtable->lcopy_format = p;
1037 if (value_table->lcopy_format)
1038 strcat (p, value_table->lcopy_format);
1040 node->data->common.value_table = vtable;
1041 node->mutatable_check_cache = (node->data->common.value_table->value_init != NULL &&
1042 !((G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_ABSTRACT) &
1043 GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))));
1045 g_assert (node->data->common.value_table != NULL); /* paranoid */
1049 type_data_ref_Wm (TypeNode *node)
1053 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1055 GTypeValueTable tmp_value_table;
1057 g_assert (node->plugin != NULL);
1061 type_data_ref_Wm (pnode);
1063 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1066 memset (&tmp_info, 0, sizeof (tmp_info));
1067 memset (&tmp_value_table, 0, sizeof (tmp_value_table));
1069 G_WRITE_UNLOCK (&type_rw_lock);
1070 g_type_plugin_use (node->plugin);
1071 g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
1072 G_WRITE_LOCK (&type_rw_lock);
1074 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
1076 check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (node), NODE_NAME (node), &tmp_info);
1077 type_data_make_W (node, &tmp_info,
1078 check_value_table_I (NODE_NAME (node),
1079 &tmp_value_table) ? &tmp_value_table : NULL);
1083 g_assert (node->data->common.ref_count > 0);
1085 node->data->common.ref_count += 1;
1090 type_data_unref_Wm (TypeNode *node,
1093 g_assert (node->data && node->data->common.ref_count);
1095 if (node->data->common.ref_count > 1)
1096 node->data->common.ref_count -= 1;
1101 g_warning ("static type `%s' unreferenced too often",
1106 type_data_last_unref_Wm (NODE_TYPE (node), uncached);
1111 type_node_add_iface_entry_W (TypeNode *node,
1113 IFaceEntry *parent_entry)
1115 IFaceEntry *entries;
1118 g_assert (node->is_instantiatable && CLASSED_NODE_N_IFACES (node) < MAX_N_IFACES);
1120 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1121 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1122 if (entries[i].iface_type == iface_type)
1124 /* this can happen in two cases:
1125 * - our parent type already conformed to iface_type and node
1126 * got it's own holder info. here, our children already have
1127 * entries and NULL vtables, since this will only work for
1128 * uninitialized classes.
1129 * - an interface type is added to an ancestor after it was
1130 * added to a child type.
1133 g_assert (entries[i].vtable == NULL && entries[i].init_state == UNINITIALIZED);
1136 /* sick, interface is added to ancestor *after* child type;
1137 * nothing todo, the entry and our children were already setup correctly
1142 else if (entries[i].iface_type > iface_type)
1144 CLASSED_NODE_N_IFACES (node) += 1;
1145 CLASSED_NODE_IFACES_ENTRIES (node) = g_renew (IFaceEntry,
1146 CLASSED_NODE_IFACES_ENTRIES (node),
1147 CLASSED_NODE_N_IFACES (node));
1148 entries = CLASSED_NODE_IFACES_ENTRIES (node);
1149 g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (CLASSED_NODE_N_IFACES (node) - i - 1));
1150 entries[i].iface_type = iface_type;
1151 entries[i].vtable = NULL;
1152 entries[i].init_state = UNINITIALIZED;
1156 if (node->data && node->data->class.init_state >= BASE_IFACE_INIT)
1158 entries[i].init_state = INITIALIZED;
1159 entries[i].vtable = parent_entry->vtable;
1161 for (i = 0; i < node->n_children; i++)
1162 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), iface_type, &entries[i]);
1167 type_add_interface_Wm (TypeNode *node,
1169 const GInterfaceInfo *info,
1170 GTypePlugin *plugin)
1172 IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
1176 g_assert (node->is_instantiatable && NODE_IS_IFACE (iface) && ((info && !plugin) || (!info && plugin)));
1178 iholder->next = iface_node_get_holders_L (iface);
1179 iface_node_set_holders_W (iface, iholder);
1180 iholder->instance_type = NODE_TYPE (node);
1181 iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
1182 iholder->plugin = plugin;
1184 /* create an iface entry for this type */
1185 type_node_add_iface_entry_W (node, NODE_TYPE (iface), NULL);
1187 /* if the class is already (partly) initialized, we may need to base
1188 * initalize and/or initialize the new interface.
1192 InitState class_state = node->data->class.init_state;
1194 if (class_state >= BASE_IFACE_INIT)
1195 type_iface_vtable_base_init_Wm (iface, node);
1197 if (class_state >= IFACE_INIT)
1198 type_iface_vtable_iface_init_Wm (iface, node);
1201 /* create iface entries for children of this type */
1202 entry = type_lookup_iface_entry_L (node, iface);
1203 for (i = 0; i < node->n_children; i++)
1204 type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), NODE_TYPE (iface), entry);
1208 type_iface_add_prerequisite_W (TypeNode *iface,
1209 TypeNode *prerequisite_node)
1211 GType prerequisite_type = NODE_TYPE (prerequisite_node);
1212 GType *prerequisites, *dependants;
1213 guint n_dependants, i;
1215 g_assert (NODE_IS_IFACE (iface) &&
1216 IFACE_NODE_N_PREREQUISITES (iface) < MAX_N_PREREQUISITES &&
1217 (prerequisite_node->is_instantiatable || NODE_IS_IFACE (prerequisite_node)));
1219 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1220 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1221 if (prerequisites[i] == prerequisite_type)
1222 return; /* we already have that prerequisiste */
1223 else if (prerequisites[i] > prerequisite_type)
1225 IFACE_NODE_N_PREREQUISITES (iface) += 1;
1226 IFACE_NODE_PREREQUISITES (iface) = g_renew (GType,
1227 IFACE_NODE_PREREQUISITES (iface),
1228 IFACE_NODE_N_PREREQUISITES (iface));
1229 prerequisites = IFACE_NODE_PREREQUISITES (iface);
1230 g_memmove (prerequisites + i + 1, prerequisites + i,
1231 sizeof (prerequisites[0]) * (IFACE_NODE_N_PREREQUISITES (iface) - i - 1));
1232 prerequisites[i] = prerequisite_type;
1234 /* we want to get notified when prerequisites get added to prerequisite_node */
1235 if (NODE_IS_IFACE (prerequisite_node))
1237 dependants = iface_node_get_dependants_array_L (prerequisite_node);
1238 n_dependants = dependants ? dependants[0] : 0;
1240 dependants = g_renew (GType, dependants, n_dependants + 1);
1241 dependants[n_dependants] = NODE_TYPE (iface);
1242 dependants[0] = n_dependants;
1243 iface_node_set_dependants_array_W (prerequisite_node, dependants);
1246 /* we need to notify all dependants */
1247 dependants = iface_node_get_dependants_array_L (iface);
1248 n_dependants = dependants ? dependants[0] : 0;
1249 for (i = 1; i <= n_dependants; i++)
1250 type_iface_add_prerequisite_W (lookup_type_node_I (dependants[i]), prerequisite_node);
1254 g_type_interface_add_prerequisite (GType interface_type,
1255 GType prerequisite_type)
1257 TypeNode *iface, *prerequisite_node;
1258 IFaceHolder *holders;
1260 g_return_if_fail (G_TYPE_IS_INTERFACE (interface_type)); /* G_TYPE_IS_INTERFACE() is an external call: _U */
1261 g_return_if_fail (!g_type_is_a (interface_type, prerequisite_type));
1262 g_return_if_fail (!g_type_is_a (prerequisite_type, interface_type));
1264 iface = lookup_type_node_I (interface_type);
1265 prerequisite_node = lookup_type_node_I (prerequisite_type);
1266 if (!iface || !prerequisite_node || !NODE_IS_IFACE (iface))
1268 g_warning ("interface type `%s' or prerequisite type `%s' invalid",
1269 type_descriptive_name_I (interface_type),
1270 type_descriptive_name_I (prerequisite_type));
1273 G_WRITE_LOCK (&type_rw_lock);
1274 holders = iface_node_get_holders_L (iface);
1277 G_WRITE_UNLOCK (&type_rw_lock);
1278 g_warning ("unable to add prerequisite `%s' to interface `%s' which is already in use for `%s'",
1279 type_descriptive_name_I (prerequisite_type),
1280 type_descriptive_name_I (interface_type),
1281 type_descriptive_name_I (holders->instance_type));
1284 if (prerequisite_node->is_instantiatable)
1288 /* can have at most one publically installable instantiatable prerequisite */
1289 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1291 TypeNode *prnode = lookup_type_node_I (IFACE_NODE_PREREQUISITES (iface)[i]);
1293 if (prnode->is_instantiatable)
1295 G_WRITE_UNLOCK (&type_rw_lock);
1296 g_warning ("adding prerequisite `%s' to interface `%s' conflicts with existing prerequisite `%s'",
1297 type_descriptive_name_I (prerequisite_type),
1298 type_descriptive_name_I (interface_type),
1299 type_descriptive_name_I (NODE_TYPE (prnode)));
1304 for (i = 0; i < prerequisite_node->n_supers + 1; i++)
1305 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisite_node->supers[i]));
1306 G_WRITE_UNLOCK (&type_rw_lock);
1308 else if (NODE_IS_IFACE (prerequisite_node))
1310 GType *prerequisites;
1313 prerequisites = IFACE_NODE_PREREQUISITES (prerequisite_node);
1314 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (prerequisite_node); i++)
1315 type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisites[i]));
1316 type_iface_add_prerequisite_W (iface, prerequisite_node);
1317 G_WRITE_UNLOCK (&type_rw_lock);
1321 G_WRITE_UNLOCK (&type_rw_lock);
1322 g_warning ("prerequisite `%s' for interface `%s' is neither instantiatable nor interface",
1323 type_descriptive_name_I (prerequisite_type),
1324 type_descriptive_name_I (interface_type));
1328 GType* /* free result */
1329 g_type_interface_prerequisites (GType interface_type,
1330 guint *n_prerequisites)
1334 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
1336 iface = lookup_type_node_I (interface_type);
1340 TypeNode *inode = NULL;
1343 G_READ_LOCK (&type_rw_lock);
1344 types = g_new0 (GType, IFACE_NODE_N_PREREQUISITES (iface) + 1);
1345 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
1347 GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
1348 TypeNode *node = lookup_type_node_I (prerequisite);
1349 if (node->is_instantiatable &&
1350 (!inode || type_node_is_a_L (node, inode)))
1353 types[n++] = NODE_TYPE (node);
1356 types[n++] = NODE_TYPE (inode);
1358 if (n_prerequisites)
1359 *n_prerequisites = n;
1360 G_READ_UNLOCK (&type_rw_lock);
1366 if (n_prerequisites)
1367 *n_prerequisites = 0;
1375 type_iface_peek_holder_L (TypeNode *iface,
1376 GType instance_type)
1378 IFaceHolder *iholder;
1380 g_assert (NODE_IS_IFACE (iface));
1382 iholder = iface_node_get_holders_L (iface);
1383 while (iholder && iholder->instance_type != instance_type)
1384 iholder = iholder->next;
1389 type_iface_retrieve_holder_info_Wm (TypeNode *iface,
1390 GType instance_type,
1393 IFaceHolder *iholder = type_iface_peek_holder_L (iface, instance_type);
1395 if (iholder && !iholder->info && need_info)
1397 GInterfaceInfo tmp_info;
1399 g_assert (iholder->plugin != NULL);
1401 type_data_ref_Wm (iface);
1403 INVALID_RECURSION ("g_type_plugin_*", iface->plugin, NODE_NAME (iface));
1405 memset (&tmp_info, 0, sizeof (tmp_info));
1407 G_WRITE_UNLOCK (&type_rw_lock);
1408 g_type_plugin_use (iholder->plugin);
1409 g_type_plugin_complete_interface_info (iholder->plugin, instance_type, NODE_TYPE (iface), &tmp_info);
1410 G_WRITE_LOCK (&type_rw_lock);
1412 INVALID_RECURSION ("g_type_plugin_*", iholder->plugin, NODE_NAME (iface));
1414 check_interface_info_I (iface, instance_type, &tmp_info);
1415 iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
1418 return iholder; /* we don't modify write lock upon returning NULL */
1422 type_iface_blow_holder_info_Wm (TypeNode *iface,
1423 GType instance_type)
1425 IFaceHolder *iholder = iface_node_get_holders_L (iface);
1427 g_assert (NODE_IS_IFACE (iface));
1429 while (iholder->instance_type != instance_type)
1430 iholder = iholder->next;
1432 if (iholder->info && iholder->plugin)
1434 g_free (iholder->info);
1435 iholder->info = NULL;
1437 G_WRITE_UNLOCK (&type_rw_lock);
1438 g_type_plugin_unuse (iholder->plugin);
1439 G_WRITE_LOCK (&type_rw_lock);
1441 type_data_unref_Wm (iface, FALSE);
1445 /* Assumes type's class already exists
1447 static inline size_t
1448 type_total_instance_size_I (TypeNode *node)
1450 gsize total_instance_size;
1452 total_instance_size = node->data->instance.instance_size;
1453 if (node->data->instance.private_size != 0)
1454 total_instance_size = ALIGN_STRUCT (total_instance_size) + node->data->instance.private_size;
1456 return total_instance_size;
1459 /* --- type structure creation/destruction --- */
1463 } InstanceRealClass;
1465 instance_real_class_cmp (gconstpointer p1,
1468 const InstanceRealClass *irc1 = p1;
1469 const InstanceRealClass *irc2 = p2;
1470 guint8 *i1 = irc1->instance;
1471 guint8 *i2 = irc2->instance;
1472 return G_BSEARCH_ARRAY_CMP (i1, i2);
1474 G_LOCK_DEFINE_STATIC (instance_real_class);
1475 static GBSearchArray *instance_real_class_bsa = NULL;
1476 static GBSearchConfig instance_real_class_bconfig = {
1477 sizeof (InstanceRealClass),
1478 instance_real_class_cmp,
1482 instance_real_class_set (gpointer instance,
1485 InstanceRealClass key;
1486 key.instance = instance;
1488 G_LOCK (instance_real_class);
1489 if (!instance_real_class_bsa)
1490 instance_real_class_bsa = g_bsearch_array_create (&instance_real_class_bconfig);
1491 instance_real_class_bsa = g_bsearch_array_replace (instance_real_class_bsa, &instance_real_class_bconfig, &key);
1492 G_UNLOCK (instance_real_class);
1495 instance_real_class_remove (gpointer instance)
1497 InstanceRealClass key, *node;
1499 key.instance = instance;
1500 G_LOCK (instance_real_class);
1501 node = g_bsearch_array_lookup (instance_real_class_bsa, &instance_real_class_bconfig, &key);
1502 index = g_bsearch_array_get_index (instance_real_class_bsa, &instance_real_class_bconfig, node);
1503 instance_real_class_bsa = g_bsearch_array_remove (instance_real_class_bsa, &instance_real_class_bconfig, index);
1504 if (!g_bsearch_array_get_n_nodes (instance_real_class_bsa))
1506 g_bsearch_array_free (instance_real_class_bsa, &instance_real_class_bconfig);
1507 instance_real_class_bsa = NULL;
1509 G_UNLOCK (instance_real_class);
1511 static inline GTypeClass*
1512 instance_real_class_get (gpointer instance)
1514 InstanceRealClass key, *node;
1515 key.instance = instance;
1516 G_LOCK (instance_real_class);
1517 node = g_bsearch_array_lookup (instance_real_class_bsa, &instance_real_class_bconfig, &key);
1518 G_UNLOCK (instance_real_class);
1519 return node ? node->class : NULL;
1523 g_type_create_instance (GType type)
1526 GTypeInstance *instance;
1529 gsize total_instance_size;
1531 node = lookup_type_node_I (type);
1532 if (!node || !node->is_instantiatable)
1534 g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
1535 type_descriptive_name_I (type));
1538 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1539 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
1541 g_warning ("cannot create instance of abstract (non-instantiatable) type `%s'",
1542 type_descriptive_name_I (type));
1546 class = g_type_class_ref (type);
1548 total_instance_size = type_total_instance_size_I (node);
1550 if (node->data->instance.n_preallocs)
1552 G_WRITE_LOCK (&type_rw_lock);
1553 if (!node->data->instance.mem_chunk)
1555 /* If there isn't private data, the compiler will have already
1556 * added the necessary padding, but in the private data case, we
1557 * have to pad ourselves to ensure proper alignment of all the
1558 * atoms in the slab.
1560 gsize atom_size = total_instance_size;
1561 if (node->data->instance.private_size)
1562 atom_size = ALIGN_STRUCT (atom_size);
1564 node->data->instance.mem_chunk = g_mem_chunk_new (NODE_NAME (node),
1567 node->data->instance.n_preallocs),
1571 instance = g_chunk_new0 (GTypeInstance, node->data->instance.mem_chunk);
1572 G_WRITE_UNLOCK (&type_rw_lock);
1575 instance = g_malloc0 (total_instance_size); /* fine without read lock */
1577 if (node->data->instance.private_size)
1578 instance_real_class_set (instance, class);
1579 for (i = node->n_supers; i > 0; i--)
1583 pnode = lookup_type_node_I (node->supers[i]);
1584 if (pnode->data->instance.instance_init)
1586 instance->g_class = pnode->data->instance.class;
1587 pnode->data->instance.instance_init (instance, class);
1590 if (node->data->instance.private_size)
1591 instance_real_class_remove (instance);
1593 instance->g_class = class;
1594 if (node->data->instance.instance_init)
1595 node->data->instance.instance_init (instance, class);
1601 g_type_free_instance (GTypeInstance *instance)
1606 g_return_if_fail (instance != NULL && instance->g_class != NULL);
1608 class = instance->g_class;
1609 node = lookup_type_node_I (class->g_type);
1610 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != (gpointer) class)
1612 g_warning ("cannot free instance of invalid (non-instantiatable) type `%s'",
1613 type_descriptive_name_I (class->g_type));
1616 /* G_TYPE_IS_ABSTRACT() is an external call: _U */
1617 if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (NODE_TYPE (node)))
1619 g_warning ("cannot free instance of abstract (non-instantiatable) type `%s'",
1624 instance->g_class = NULL;
1625 #ifdef G_ENABLE_DEBUG
1626 memset (instance, 0xaa, type_total_instance_size_I (node)); /* debugging hack */
1628 if (node->data->instance.n_preallocs)
1630 G_WRITE_LOCK (&type_rw_lock);
1631 g_chunk_free (instance, node->data->instance.mem_chunk);
1632 G_WRITE_UNLOCK (&type_rw_lock);
1637 g_type_class_unref (class);
1641 type_iface_ensure_dflt_vtable_Wm (TypeNode *iface)
1643 g_assert (iface->data);
1645 if (!iface->data->iface.dflt_vtable)
1647 GTypeInterface *vtable = g_malloc0 (iface->data->iface.vtable_size);
1648 iface->data->iface.dflt_vtable = vtable;
1649 vtable->g_type = NODE_TYPE (iface);
1650 vtable->g_instance_type = 0;
1651 if (iface->data->iface.vtable_init_base ||
1652 iface->data->iface.dflt_init)
1654 G_WRITE_UNLOCK (&type_rw_lock);
1655 if (iface->data->iface.vtable_init_base)
1656 iface->data->iface.vtable_init_base (vtable);
1657 if (iface->data->iface.dflt_init)
1658 iface->data->iface.dflt_init (vtable, (gpointer) iface->data->iface.dflt_data);
1659 G_WRITE_LOCK (&type_rw_lock);
1665 /* This is called to allocate and do the first part of initializing
1666 * the interface vtable; type_iface_vtable_iface_init_Wm() does the remainder.
1668 * A FALSE return indicates that we didn't find an init function for
1669 * this type/iface pair, so the vtable from the parent type should
1670 * be used. Note that the write lock is not modified upon a FALSE
1674 type_iface_vtable_base_init_Wm (TypeNode *iface,
1678 IFaceHolder *iholder;
1679 GTypeInterface *vtable = NULL;
1682 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1683 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), TRUE);
1685 return FALSE; /* we don't modify write lock upon FALSE */
1687 type_iface_ensure_dflt_vtable_Wm (iface);
1689 entry = type_lookup_iface_entry_L (node, iface);
1691 g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
1693 entry->init_state = IFACE_INIT;
1695 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1696 if (pnode) /* want to copy over parent iface contents */
1698 IFaceEntry *pentry = type_lookup_iface_entry_L (pnode, iface);
1701 vtable = g_memdup (pentry->vtable, iface->data->iface.vtable_size);
1704 vtable = g_memdup (iface->data->iface.dflt_vtable, iface->data->iface.vtable_size);
1705 entry->vtable = vtable;
1706 vtable->g_type = NODE_TYPE (iface);
1707 vtable->g_instance_type = NODE_TYPE (node);
1709 if (iface->data->iface.vtable_init_base)
1711 G_WRITE_UNLOCK (&type_rw_lock);
1712 iface->data->iface.vtable_init_base (vtable);
1713 G_WRITE_LOCK (&type_rw_lock);
1715 return TRUE; /* initialized the vtable */
1718 /* Finishes what type_iface_vtable_base_init_Wm started by
1719 * calling the interface init function.
1720 * this function may only be called for types with their
1721 * own interface holder info, i.e. types for which
1722 * g_type_add_interface*() was called and not children thereof.
1725 type_iface_vtable_iface_init_Wm (TypeNode *iface,
1728 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1729 IFaceHolder *iholder = type_iface_peek_holder_L (iface, NODE_TYPE (node));
1730 GTypeInterface *vtable = NULL;
1733 /* iholder->info should have been filled in by type_iface_vtable_base_init_Wm() */
1734 g_assert (iface->data && entry && iholder && iholder->info);
1735 g_assert (entry->init_state == IFACE_INIT); /* assert prior base_init() */
1737 entry->init_state = INITIALIZED;
1739 vtable = entry->vtable;
1741 if (iholder->info->interface_init)
1743 G_WRITE_UNLOCK (&type_rw_lock);
1744 if (iholder->info->interface_init)
1745 iholder->info->interface_init (vtable, iholder->info->interface_data);
1746 G_WRITE_LOCK (&type_rw_lock);
1749 for (i = 0; i < static_n_iface_check_funcs; i++)
1751 GTypeInterfaceCheckFunc check_func = static_iface_check_funcs[i].check_func;
1752 gpointer check_data = static_iface_check_funcs[i].check_data;
1754 G_WRITE_UNLOCK (&type_rw_lock);
1755 check_func (check_data, (gpointer)vtable);
1756 G_WRITE_LOCK (&type_rw_lock);
1761 type_iface_vtable_finalize_Wm (TypeNode *iface,
1763 GTypeInterface *vtable)
1765 IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
1766 IFaceHolder *iholder;
1768 /* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
1769 iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), FALSE);
1771 return FALSE; /* we don't modify write lock upon FALSE */
1773 g_assert (entry && entry->vtable == vtable && iholder->info);
1775 entry->vtable = NULL;
1776 entry->init_state = UNINITIALIZED;
1777 if (iholder->info->interface_finalize || iface->data->iface.vtable_finalize_base)
1779 G_WRITE_UNLOCK (&type_rw_lock);
1780 if (iholder->info->interface_finalize)
1781 iholder->info->interface_finalize (vtable, iholder->info->interface_data);
1782 if (iface->data->iface.vtable_finalize_base)
1783 iface->data->iface.vtable_finalize_base (vtable);
1784 G_WRITE_LOCK (&type_rw_lock);
1787 vtable->g_instance_type = 0;
1790 type_iface_blow_holder_info_Wm (iface, NODE_TYPE (node));
1792 return TRUE; /* write lock modified */
1796 type_class_init_Wm (TypeNode *node,
1799 GSList *slist, *init_slist = NULL;
1802 TypeNode *bnode, *pnode;
1805 g_assert (node->is_classed && node->data &&
1806 node->data->class.class_size &&
1807 !node->data->class.class &&
1808 node->data->class.init_state == UNINITIALIZED);
1810 class = g_malloc0 (node->data->class.class_size);
1811 node->data->class.class = class;
1812 node->data->class.init_state = BASE_CLASS_INIT;
1816 TypeNode *pnode = lookup_type_node_I (pclass->g_type);
1818 memcpy (class, pclass, pnode->data->class.class_size);
1820 if (node->is_instantiatable)
1822 /* We need to initialize the private_size here rather than in
1823 * type_data_make_W() since the class init for the parent
1824 * class may have changed pnode->data->instance.private_size.
1826 node->data->instance.private_size = pnode->data->instance.private_size;
1829 class->g_type = NODE_TYPE (node);
1831 G_WRITE_UNLOCK (&type_rw_lock);
1833 /* stack all base class initialization functions, so we
1834 * call them in ascending order.
1836 for (bnode = node; bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1837 if (bnode->data->class.class_init_base)
1838 init_slist = g_slist_prepend (init_slist, (gpointer) bnode->data->class.class_init_base);
1839 for (slist = init_slist; slist; slist = slist->next)
1841 GBaseInitFunc class_init_base = (GBaseInitFunc) slist->data;
1843 class_init_base (class);
1845 g_slist_free (init_slist);
1847 G_WRITE_LOCK (&type_rw_lock);
1849 node->data->class.init_state = BASE_IFACE_INIT;
1851 /* Before we initialize the class, base initialize all interfaces, either
1852 * from parent, or through our holder info
1854 pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
1857 while (i < CLASSED_NODE_N_IFACES (node))
1859 entry = &CLASSED_NODE_IFACES_ENTRIES (node)[i];
1860 while (i < CLASSED_NODE_N_IFACES (node) &&
1861 entry->init_state == IFACE_INIT)
1867 if (i == CLASSED_NODE_N_IFACES (node))
1870 if (!type_iface_vtable_base_init_Wm (lookup_type_node_I (entry->iface_type), node))
1874 /* need to get this interface from parent, type_iface_vtable_base_init_Wm()
1875 * doesn't modify write lock upon FALSE, so entry is still valid;
1877 g_assert (pnode != NULL);
1879 for (j = 0; j < CLASSED_NODE_N_IFACES (pnode); j++)
1881 IFaceEntry *pentry = CLASSED_NODE_IFACES_ENTRIES (pnode) + j;
1883 if (pentry->iface_type == entry->iface_type)
1885 entry->vtable = pentry->vtable;
1886 entry->init_state = INITIALIZED;
1890 g_assert (entry->vtable != NULL);
1893 /* If the write lock was released, additional interface entries might
1894 * have been inserted into CLASSED_NODE_IFACES_ENTRIES (node); they'll
1895 * be base-initialized when inserted, so we don't have to worry that
1896 * we might miss them. Uninitialized entries can only be moved higher
1897 * when new ones are inserted.
1902 node->data->class.init_state = CLASS_INIT;
1904 G_WRITE_UNLOCK (&type_rw_lock);
1906 if (node->data->class.class_init)
1907 node->data->class.class_init (class, (gpointer) node->data->class.class_data);
1909 G_WRITE_LOCK (&type_rw_lock);
1911 node->data->class.init_state = IFACE_INIT;
1913 /* finish initializing the interfaces through our holder info.
1914 * inherited interfaces are already init_state == INITIALIZED, because
1915 * they either got setup in the above base_init loop, or during
1916 * class_init from within type_add_interface_Wm() for this or
1917 * an anchestor type.
1922 entry = &CLASSED_NODE_IFACES_ENTRIES (node)[i];
1923 while (i < CLASSED_NODE_N_IFACES (node) &&
1924 entry->init_state == INITIALIZED)
1930 if (i == CLASSED_NODE_N_IFACES (node))
1933 type_iface_vtable_iface_init_Wm (lookup_type_node_I (entry->iface_type), node);
1935 /* As in the loop above, additional initialized entries might be inserted
1936 * if the write lock is released, but that's harmless because the entries
1937 * we need to initialize only move higher in the list.
1942 node->data->class.init_state = INITIALIZED;
1946 type_data_finalize_class_ifaces_Wm (TypeNode *node)
1950 g_assert (node->is_instantiatable && node->data && node->data->class.class && node->data->common.ref_count == 0);
1953 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
1955 IFaceEntry *entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
1958 if (type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
1960 /* refetch entries, IFACES_ENTRIES might be modified */
1965 /* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
1966 * iface vtable came from parent
1968 entry->vtable = NULL;
1969 entry->init_state = UNINITIALIZED;
1976 type_data_finalize_class_U (TypeNode *node,
1979 GTypeClass *class = cdata->class;
1982 g_assert (cdata->class && cdata->common.ref_count == 0);
1984 if (cdata->class_finalize)
1985 cdata->class_finalize (class, (gpointer) cdata->class_data);
1987 /* call all base class destruction functions in descending order
1989 if (cdata->class_finalize_base)
1990 cdata->class_finalize_base (class);
1991 for (bnode = lookup_type_node_I (NODE_PARENT_TYPE (node)); bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
1992 if (bnode->data->class.class_finalize_base)
1993 bnode->data->class.class_finalize_base (class);
1995 g_free (cdata->class);
1999 type_data_last_unref_Wm (GType type,
2002 TypeNode *node = lookup_type_node_I (type);
2004 g_return_if_fail (node != NULL && node->plugin != NULL);
2006 if (!node->data || node->data->common.ref_count == 0)
2008 g_warning ("cannot drop last reference to unreferenced type `%s'",
2009 type_descriptive_name_I (type));
2013 /* call class cache hooks */
2014 if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs && !uncached)
2018 G_WRITE_UNLOCK (&type_rw_lock);
2019 G_READ_LOCK (&type_rw_lock);
2020 for (i = 0; i < static_n_class_cache_funcs; i++)
2022 GTypeClassCacheFunc cache_func = static_class_cache_funcs[i].cache_func;
2023 gpointer cache_data = static_class_cache_funcs[i].cache_data;
2024 gboolean need_break;
2026 G_READ_UNLOCK (&type_rw_lock);
2027 need_break = cache_func (cache_data, node->data->class.class);
2028 G_READ_LOCK (&type_rw_lock);
2029 if (!node->data || node->data->common.ref_count == 0)
2030 INVALID_RECURSION ("GType class cache function ", cache_func, NODE_NAME (node));
2034 G_READ_UNLOCK (&type_rw_lock);
2035 G_WRITE_LOCK (&type_rw_lock);
2038 if (node->data->common.ref_count > 1) /* may have been re-referenced meanwhile */
2039 node->data->common.ref_count -= 1;
2042 GType ptype = NODE_PARENT_TYPE (node);
2045 node->data->common.ref_count = 0;
2047 if (node->is_instantiatable && node->data->instance.mem_chunk)
2049 g_mem_chunk_destroy (node->data->instance.mem_chunk);
2050 node->data->instance.mem_chunk = NULL;
2054 if (node->is_classed && tdata->class.class)
2056 if (CLASSED_NODE_N_IFACES (node))
2057 type_data_finalize_class_ifaces_Wm (node);
2058 node->mutatable_check_cache = FALSE;
2060 G_WRITE_UNLOCK (&type_rw_lock);
2061 type_data_finalize_class_U (node, &tdata->class);
2062 G_WRITE_LOCK (&type_rw_lock);
2064 else if (NODE_IS_IFACE (node) && tdata->iface.dflt_vtable)
2066 node->mutatable_check_cache = FALSE;
2068 if (tdata->iface.dflt_finalize || tdata->iface.vtable_finalize_base)
2070 G_WRITE_UNLOCK (&type_rw_lock);
2071 if (tdata->iface.dflt_finalize)
2072 tdata->iface.dflt_finalize (tdata->iface.dflt_vtable, (gpointer) tdata->iface.dflt_data);
2073 if (tdata->iface.vtable_finalize_base)
2074 tdata->iface.vtable_finalize_base (tdata->iface.dflt_vtable);
2075 G_WRITE_LOCK (&type_rw_lock);
2077 g_free (tdata->iface.dflt_vtable);
2081 node->mutatable_check_cache = FALSE;
2085 /* freeing tdata->common.value_table and its contents is taken care of
2086 * by allocating it in one chunk with tdata
2090 G_WRITE_UNLOCK (&type_rw_lock);
2091 g_type_plugin_unuse (node->plugin);
2092 G_WRITE_LOCK (&type_rw_lock);
2094 type_data_unref_Wm (lookup_type_node_I (ptype), FALSE);
2099 g_type_add_class_cache_func (gpointer cache_data,
2100 GTypeClassCacheFunc cache_func)
2104 g_return_if_fail (cache_func != NULL);
2106 G_WRITE_LOCK (&type_rw_lock);
2107 i = static_n_class_cache_funcs++;
2108 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
2109 static_class_cache_funcs[i].cache_data = cache_data;
2110 static_class_cache_funcs[i].cache_func = cache_func;
2111 G_WRITE_UNLOCK (&type_rw_lock);
2115 g_type_remove_class_cache_func (gpointer cache_data,
2116 GTypeClassCacheFunc cache_func)
2118 gboolean found_it = FALSE;
2121 g_return_if_fail (cache_func != NULL);
2123 G_WRITE_LOCK (&type_rw_lock);
2124 for (i = 0; i < static_n_class_cache_funcs; i++)
2125 if (static_class_cache_funcs[i].cache_data == cache_data &&
2126 static_class_cache_funcs[i].cache_func == cache_func)
2128 static_n_class_cache_funcs--;
2129 g_memmove (static_class_cache_funcs + i,
2130 static_class_cache_funcs + i + 1,
2131 sizeof (static_class_cache_funcs[0]) * (static_n_class_cache_funcs - i));
2132 static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
2136 G_WRITE_UNLOCK (&type_rw_lock);
2139 g_warning (G_STRLOC ": cannot remove unregistered class cache func %p with data %p",
2140 cache_func, cache_data);
2145 g_type_add_interface_check (gpointer check_data,
2146 GTypeInterfaceCheckFunc check_func)
2150 g_return_if_fail (check_func != NULL);
2152 G_WRITE_LOCK (&type_rw_lock);
2153 i = static_n_iface_check_funcs++;
2154 static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
2155 static_iface_check_funcs[i].check_data = check_data;
2156 static_iface_check_funcs[i].check_func = check_func;
2157 G_WRITE_UNLOCK (&type_rw_lock);
2161 g_type_remove_interface_check (gpointer check_data,
2162 GTypeInterfaceCheckFunc check_func)
2164 gboolean found_it = FALSE;
2167 g_return_if_fail (check_func != NULL);
2169 G_WRITE_LOCK (&type_rw_lock);
2170 for (i = 0; i < static_n_iface_check_funcs; i++)
2171 if (static_iface_check_funcs[i].check_data == check_data &&
2172 static_iface_check_funcs[i].check_func == check_func)
2174 static_n_iface_check_funcs--;
2175 g_memmove (static_iface_check_funcs + i,
2176 static_iface_check_funcs + i + 1,
2177 sizeof (static_iface_check_funcs[0]) * (static_n_iface_check_funcs - i));
2178 static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
2182 G_WRITE_UNLOCK (&type_rw_lock);
2185 g_warning (G_STRLOC ": cannot remove unregistered class check func %p with data %p",
2186 check_func, check_data);
2189 /* --- type registration --- */
2191 g_type_register_fundamental (GType type_id,
2192 const gchar *type_name,
2193 const GTypeInfo *info,
2194 const GTypeFundamentalInfo *finfo,
2197 GTypeFundamentalInfo *node_finfo;
2200 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2201 g_return_val_if_fail (type_id > 0, 0);
2202 g_return_val_if_fail (type_name != NULL, 0);
2203 g_return_val_if_fail (info != NULL, 0);
2204 g_return_val_if_fail (finfo != NULL, 0);
2206 if (!check_type_name_I (type_name))
2208 if ((type_id & TYPE_ID_MASK) ||
2209 type_id > G_TYPE_FUNDAMENTAL_MAX)
2211 g_warning ("attempt to register fundamental type `%s' with invalid type id (%lu)",
2216 if ((finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
2217 !(finfo->type_flags & G_TYPE_FLAG_CLASSED))
2219 g_warning ("cannot register instantiatable fundamental type `%s' as non-classed",
2223 if (lookup_type_node_I (type_id))
2225 g_warning ("cannot register existing fundamental type `%s' (as `%s')",
2226 type_descriptive_name_I (type_id),
2231 G_WRITE_LOCK (&type_rw_lock);
2232 node = type_node_fundamental_new_W (type_id, type_name, finfo->type_flags);
2233 node_finfo = type_node_fundamental_info_I (node);
2234 type_add_flags_W (node, flags);
2236 if (check_type_info_I (NULL, NODE_FUNDAMENTAL_TYPE (node), type_name, info))
2237 type_data_make_W (node, info,
2238 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
2239 G_WRITE_UNLOCK (&type_rw_lock);
2241 return NODE_TYPE (node);
2245 g_type_register_static (GType parent_type,
2246 const gchar *type_name,
2247 const GTypeInfo *info,
2250 TypeNode *pnode, *node;
2253 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2254 g_return_val_if_fail (parent_type > 0, 0);
2255 g_return_val_if_fail (type_name != NULL, 0);
2256 g_return_val_if_fail (info != NULL, 0);
2258 if (!check_type_name_I (type_name) ||
2259 !check_derivation_I (parent_type, type_name))
2261 if (info->class_finalize)
2263 g_warning ("class finalizer specified for static type `%s'",
2268 pnode = lookup_type_node_I (parent_type);
2269 G_WRITE_LOCK (&type_rw_lock);
2270 type_data_ref_Wm (pnode);
2271 if (check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (pnode), type_name, info))
2273 node = type_node_new_W (pnode, type_name, NULL);
2274 type_add_flags_W (node, flags);
2275 type = NODE_TYPE (node);
2276 type_data_make_W (node, info,
2277 check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
2279 G_WRITE_UNLOCK (&type_rw_lock);
2285 g_type_register_dynamic (GType parent_type,
2286 const gchar *type_name,
2287 GTypePlugin *plugin,
2290 TypeNode *pnode, *node;
2293 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
2294 g_return_val_if_fail (parent_type > 0, 0);
2295 g_return_val_if_fail (type_name != NULL, 0);
2296 g_return_val_if_fail (plugin != NULL, 0);
2298 if (!check_type_name_I (type_name) ||
2299 !check_derivation_I (parent_type, type_name) ||
2300 !check_plugin_U (plugin, TRUE, FALSE, type_name))
2303 G_WRITE_LOCK (&type_rw_lock);
2304 pnode = lookup_type_node_I (parent_type);
2305 node = type_node_new_W (pnode, type_name, plugin);
2306 type_add_flags_W (node, flags);
2307 type = NODE_TYPE (node);
2308 G_WRITE_UNLOCK (&type_rw_lock);
2314 g_type_add_interface_static (GType instance_type,
2315 GType interface_type,
2316 const GInterfaceInfo *info)
2318 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
2319 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
2320 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
2322 G_WRITE_LOCK (&type_rw_lock);
2323 if (check_add_interface_L (instance_type, interface_type))
2325 TypeNode *node = lookup_type_node_I (instance_type);
2326 TypeNode *iface = lookup_type_node_I (interface_type);
2328 if (check_interface_info_I (iface, NODE_TYPE (node), info))
2329 type_add_interface_Wm (node, iface, info, NULL);
2331 G_WRITE_UNLOCK (&type_rw_lock);
2335 g_type_add_interface_dynamic (GType instance_type,
2336 GType interface_type,
2337 GTypePlugin *plugin)
2341 /* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
2342 g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
2343 g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
2345 node = lookup_type_node_I (instance_type);
2346 if (!check_plugin_U (plugin, FALSE, TRUE, NODE_NAME (node)))
2349 G_WRITE_LOCK (&type_rw_lock);
2350 if (check_add_interface_L (instance_type, interface_type))
2352 TypeNode *iface = lookup_type_node_I (interface_type);
2354 type_add_interface_Wm (node, iface, NULL, plugin);
2356 G_WRITE_UNLOCK (&type_rw_lock);
2360 /* --- public API functions --- */
2362 g_type_class_ref (GType type)
2366 /* optimize for common code path
2368 G_WRITE_LOCK (&type_rw_lock);
2369 node = lookup_type_node_I (type);
2370 if (node && node->is_classed && node->data &&
2371 node->data->class.class && node->data->common.ref_count > 0)
2373 type_data_ref_Wm (node);
2374 G_WRITE_UNLOCK (&type_rw_lock);
2376 return node->data->class.class;
2379 if (!node || !node->is_classed ||
2380 (node->data && node->data->common.ref_count < 1))
2382 G_WRITE_UNLOCK (&type_rw_lock);
2383 g_warning ("cannot retrieve class for invalid (unclassed) type `%s'",
2384 type_descriptive_name_I (type));
2388 type_data_ref_Wm (node);
2390 if (!node->data->class.class)
2392 GType ptype = NODE_PARENT_TYPE (node);
2393 GTypeClass *pclass = NULL;
2397 G_WRITE_UNLOCK (&type_rw_lock);
2398 pclass = g_type_class_ref (ptype);
2399 if (node->data->class.class)
2400 INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
2401 G_WRITE_LOCK (&type_rw_lock);
2404 type_class_init_Wm (node, pclass);
2406 G_WRITE_UNLOCK (&type_rw_lock);
2408 return node->data->class.class;
2412 g_type_class_unref (gpointer g_class)
2415 GTypeClass *class = g_class;
2417 g_return_if_fail (g_class != NULL);
2419 node = lookup_type_node_I (class->g_type);
2420 G_WRITE_LOCK (&type_rw_lock);
2421 if (node && node->is_classed && node->data &&
2422 node->data->class.class == class && node->data->common.ref_count > 0)
2423 type_data_unref_Wm (node, FALSE);
2425 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2426 type_descriptive_name_I (class->g_type));
2427 G_WRITE_UNLOCK (&type_rw_lock);
2431 g_type_class_unref_uncached (gpointer g_class)
2434 GTypeClass *class = g_class;
2436 g_return_if_fail (g_class != NULL);
2438 G_WRITE_LOCK (&type_rw_lock);
2439 node = lookup_type_node_I (class->g_type);
2440 if (node && node->is_classed && node->data &&
2441 node->data->class.class == class && node->data->common.ref_count > 0)
2442 type_data_unref_Wm (node, TRUE);
2444 g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
2445 type_descriptive_name_I (class->g_type));
2446 G_WRITE_UNLOCK (&type_rw_lock);
2450 g_type_class_peek (GType type)
2455 node = lookup_type_node_I (type);
2456 G_READ_LOCK (&type_rw_lock);
2457 if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
2458 class = node->data->class.class;
2461 G_READ_UNLOCK (&type_rw_lock);
2467 g_type_class_peek_static (GType type)
2472 node = lookup_type_node_I (type);
2473 G_READ_LOCK (&type_rw_lock);
2474 if (node && node->is_classed && node->data &&
2475 /* peek only static types: */ node->plugin == NULL &&
2476 node->data->class.class) /* common.ref_count _may_ be 0 */
2477 class = node->data->class.class;
2480 G_READ_UNLOCK (&type_rw_lock);
2486 g_type_class_peek_parent (gpointer g_class)
2489 gpointer class = NULL;
2491 g_return_val_if_fail (g_class != NULL, NULL);
2493 node = lookup_type_node_I (G_TYPE_FROM_CLASS (g_class));
2494 /* We used to acquire a read lock here. That is not necessary, since
2495 * parent->data->class.class is constant as long as the derived class
2498 if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
2500 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2501 class = node->data->class.class;
2503 else if (NODE_PARENT_TYPE (node))
2504 g_warning (G_STRLOC ": invalid class pointer `%p'", g_class);
2510 g_type_interface_peek (gpointer instance_class,
2515 gpointer vtable = NULL;
2516 GTypeClass *class = instance_class;
2518 g_return_val_if_fail (instance_class != NULL, NULL);
2520 node = lookup_type_node_I (class->g_type);
2521 iface = lookup_type_node_I (iface_type);
2522 if (node && node->is_instantiatable && iface)
2526 G_READ_LOCK (&type_rw_lock);
2528 entry = type_lookup_iface_entry_L (node, iface);
2529 if (entry && entry->vtable) /* entry is relocatable */
2530 vtable = entry->vtable;
2532 G_READ_UNLOCK (&type_rw_lock);
2535 g_warning (G_STRLOC ": invalid class pointer `%p'", class);
2541 g_type_interface_peek_parent (gpointer g_iface)
2545 gpointer vtable = NULL;
2546 GTypeInterface *iface_class = g_iface;
2548 g_return_val_if_fail (g_iface != NULL, NULL);
2550 iface = lookup_type_node_I (iface_class->g_type);
2551 node = lookup_type_node_I (iface_class->g_instance_type);
2553 node = lookup_type_node_I (NODE_PARENT_TYPE (node));
2554 if (node && node->is_instantiatable && iface)
2558 G_READ_LOCK (&type_rw_lock);
2560 entry = type_lookup_iface_entry_L (node, iface);
2561 if (entry && entry->vtable) /* entry is relocatable */
2562 vtable = entry->vtable;
2564 G_READ_UNLOCK (&type_rw_lock);
2567 g_warning (G_STRLOC ": invalid interface pointer `%p'", g_iface);
2573 g_type_default_interface_ref (GType g_type)
2577 G_WRITE_LOCK (&type_rw_lock);
2579 node = lookup_type_node_I (g_type);
2580 if (!node || !NODE_IS_IFACE (node) ||
2581 (node->data && node->data->common.ref_count < 1))
2583 G_WRITE_UNLOCK (&type_rw_lock);
2584 g_warning ("cannot retrieve default vtable for invalid or non-interface type '%s'",
2585 type_descriptive_name_I (g_type));
2589 type_data_ref_Wm (node);
2591 type_iface_ensure_dflt_vtable_Wm (node);
2593 G_WRITE_UNLOCK (&type_rw_lock);
2595 return node->data->iface.dflt_vtable;
2599 g_type_default_interface_peek (GType g_type)
2604 node = lookup_type_node_I (g_type);
2605 G_READ_LOCK (&type_rw_lock);
2606 if (node && NODE_IS_IFACE (node) && node->data && node->data->iface.dflt_vtable)
2607 vtable = node->data->iface.dflt_vtable;
2610 G_READ_UNLOCK (&type_rw_lock);
2616 g_type_default_interface_unref (gpointer g_iface)
2619 GTypeInterface *vtable = g_iface;
2621 g_return_if_fail (g_iface != NULL);
2623 node = lookup_type_node_I (vtable->g_type);
2624 G_WRITE_LOCK (&type_rw_lock);
2625 if (node && NODE_IS_IFACE (node) &&
2626 node->data->iface.dflt_vtable == g_iface &&
2627 node->data->common.ref_count > 0)
2628 type_data_unref_Wm (node, FALSE);
2630 g_warning ("cannot unreference invalid interface default vtable for '%s'",
2631 type_descriptive_name_I (vtable->g_type));
2632 G_WRITE_UNLOCK (&type_rw_lock);
2635 G_CONST_RETURN gchar*
2636 g_type_name (GType type)
2640 g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, NULL);
2642 node = lookup_type_node_I (type);
2644 return node ? NODE_NAME (node) : NULL;
2648 g_type_qname (GType type)
2652 node = lookup_type_node_I (type);
2654 return node ? node->qname : 0;
2658 g_type_from_name (const gchar *name)
2663 g_return_val_if_fail (name != NULL, 0);
2665 quark = g_quark_try_string (name);
2668 G_READ_LOCK (&type_rw_lock);
2669 type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
2670 G_READ_UNLOCK (&type_rw_lock);
2677 g_type_parent (GType type)
2681 node = lookup_type_node_I (type);
2683 return node ? NODE_PARENT_TYPE (node) : 0;
2687 g_type_depth (GType type)
2691 node = lookup_type_node_I (type);
2693 return node ? node->n_supers + 1 : 0;
2697 g_type_next_base (GType type,
2703 node = lookup_type_node_I (type);
2706 TypeNode *base_node = lookup_type_node_I (base_type);
2708 if (base_node && base_node->n_supers < node->n_supers)
2710 guint n = node->n_supers - base_node->n_supers;
2712 if (node->supers[n] == base_type)
2713 atype = node->supers[n - 1];
2720 static inline gboolean
2721 type_node_check_conformities_UorL (TypeNode *node,
2722 TypeNode *iface_node,
2723 /* support_inheritance */
2724 gboolean support_interfaces,
2725 gboolean support_prerequisites,
2730 if (/* support_inheritance && */
2731 NODE_IS_ANCESTOR (iface_node, node))
2734 support_interfaces = support_interfaces && node->is_instantiatable && NODE_IS_IFACE (iface_node);
2735 support_prerequisites = support_prerequisites && NODE_IS_IFACE (node);
2737 if (support_interfaces || support_prerequisites)
2740 G_READ_LOCK (&type_rw_lock);
2741 if (support_interfaces && type_lookup_iface_entry_L (node, iface_node))
2743 else if (support_prerequisites && type_lookup_prerequisite_L (node, NODE_TYPE (iface_node)))
2746 G_READ_UNLOCK (&type_rw_lock);
2752 type_node_is_a_L (TypeNode *node,
2753 TypeNode *iface_node)
2755 return type_node_check_conformities_UorL (node, iface_node, TRUE, TRUE, TRUE);
2758 static inline gboolean
2759 type_node_conforms_to_U (TypeNode *node,
2760 TypeNode *iface_node,
2761 gboolean support_interfaces,
2762 gboolean support_prerequisites)
2764 return type_node_check_conformities_UorL (node, iface_node, support_interfaces, support_prerequisites, FALSE);
2768 g_type_is_a (GType type,
2771 TypeNode *node, *iface_node;
2774 node = lookup_type_node_I (type);
2775 iface_node = lookup_type_node_I (iface_type);
2776 is_a = node && iface_node && type_node_conforms_to_U (node, iface_node, TRUE, TRUE);
2781 GType* /* free result */
2782 g_type_children (GType type,
2787 node = lookup_type_node_I (type);
2792 G_READ_LOCK (&type_rw_lock); /* ->children is relocatable */
2793 children = g_new (GType, node->n_children + 1);
2794 memcpy (children, node->children, sizeof (GType) * node->n_children);
2795 children[node->n_children] = 0;
2798 *n_children = node->n_children;
2799 G_READ_UNLOCK (&type_rw_lock);
2812 GType* /* free result */
2813 g_type_interfaces (GType type,
2814 guint *n_interfaces)
2818 node = lookup_type_node_I (type);
2819 if (node && node->is_instantiatable)
2824 G_READ_LOCK (&type_rw_lock);
2825 ifaces = g_new (GType, CLASSED_NODE_N_IFACES (node) + 1);
2826 for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
2827 ifaces[i] = CLASSED_NODE_IFACES_ENTRIES (node)[i].iface_type;
2831 *n_interfaces = CLASSED_NODE_N_IFACES (node);
2832 G_READ_UNLOCK (&type_rw_lock);
2845 typedef struct _QData QData;
2857 static inline gpointer
2858 type_get_qdata_L (TypeNode *node,
2861 GData *gdata = node->global_gdata;
2863 if (quark && gdata && gdata->n_qdatas)
2865 QData *qdatas = gdata->qdatas - 1;
2866 guint n_qdatas = gdata->n_qdatas;
2873 i = (n_qdatas + 1) / 2;
2875 if (quark == check->quark)
2877 else if (quark > check->quark)
2882 else /* if (quark < check->quark) */
2891 g_type_get_qdata (GType type,
2897 node = lookup_type_node_I (type);
2900 G_READ_LOCK (&type_rw_lock);
2901 data = type_get_qdata_L (node, quark);
2902 G_READ_UNLOCK (&type_rw_lock);
2906 g_return_val_if_fail (node != NULL, NULL);
2913 type_set_qdata_W (TypeNode *node,
2921 /* setup qdata list if necessary */
2922 if (!node->global_gdata)
2923 node->global_gdata = g_new0 (GData, 1);
2924 gdata = node->global_gdata;
2926 /* try resetting old data */
2927 qdata = gdata->qdatas;
2928 for (i = 0; i < gdata->n_qdatas; i++)
2929 if (qdata[i].quark == quark)
2931 qdata[i].data = data;
2937 gdata->qdatas = g_renew (QData, gdata->qdatas, gdata->n_qdatas);
2938 qdata = gdata->qdatas;
2939 for (i = 0; i < gdata->n_qdatas - 1; i++)
2940 if (qdata[i].quark > quark)
2942 g_memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
2943 qdata[i].quark = quark;
2944 qdata[i].data = data;
2948 g_type_set_qdata (GType type,
2954 g_return_if_fail (quark != 0);
2956 node = lookup_type_node_I (type);
2959 G_WRITE_LOCK (&type_rw_lock);
2960 type_set_qdata_W (node, quark, data);
2961 G_WRITE_UNLOCK (&type_rw_lock);
2964 g_return_if_fail (node != NULL);
2968 type_add_flags_W (TypeNode *node,
2973 g_return_if_fail ((flags & ~TYPE_FLAG_MASK) == 0);
2974 g_return_if_fail (node != NULL);
2976 if ((flags & TYPE_FLAG_MASK) && node->is_classed && node->data && node->data->class.class)
2977 g_warning ("tagging type `%s' as abstract after class initialization", NODE_NAME (node));
2978 dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
2980 type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
2984 g_type_query (GType type,
2989 g_return_if_fail (query != NULL);
2991 /* if node is not static and classed, we won't allow query */
2993 node = lookup_type_node_I (type);
2994 if (node && node->is_classed && !node->plugin)
2996 /* type is classed and probably even instantiatable */
2997 G_READ_LOCK (&type_rw_lock);
2998 if (node->data) /* type is static or referenced */
3000 query->type = NODE_TYPE (node);
3001 query->type_name = NODE_NAME (node);
3002 query->class_size = node->data->class.class_size;
3003 query->instance_size = node->is_instantiatable ? node->data->instance.instance_size : 0;
3005 G_READ_UNLOCK (&type_rw_lock);
3010 /* --- implementation details --- */
3012 g_type_test_flags (GType type,
3016 gboolean result = FALSE;
3018 node = lookup_type_node_I (type);
3021 guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
3022 guint tflags = flags & TYPE_FLAG_MASK;
3026 GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (node);
3028 fflags = (finfo->type_flags & fflags) == fflags;
3035 G_READ_LOCK (&type_rw_lock);
3036 tflags = (tflags & GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))) == tflags;
3037 G_READ_UNLOCK (&type_rw_lock);
3042 result = tflags && fflags;
3049 g_type_get_plugin (GType type)
3053 node = lookup_type_node_I (type);
3055 return node ? node->plugin : NULL;
3059 g_type_interface_get_plugin (GType instance_type,
3060 GType interface_type)
3065 g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL); /* G_TYPE_IS_INTERFACE() is an external call: _U */
3067 node = lookup_type_node_I (instance_type);
3068 iface = lookup_type_node_I (interface_type);
3071 IFaceHolder *iholder;
3072 GTypePlugin *plugin;
3074 G_READ_LOCK (&type_rw_lock);
3076 iholder = iface_node_get_holders_L (iface);
3077 while (iholder && iholder->instance_type != instance_type)
3078 iholder = iholder->next;
3079 plugin = iholder ? iholder->plugin : NULL;
3081 G_READ_UNLOCK (&type_rw_lock);
3086 g_return_val_if_fail (node == NULL, NULL);
3087 g_return_val_if_fail (iface == NULL, NULL);
3089 g_warning (G_STRLOC ": attempt to look up plugin for invalid instance/interface type pair.");
3095 g_type_fundamental_next (void)
3099 G_READ_LOCK (&type_rw_lock);
3100 type = static_fundamental_next;
3101 G_READ_UNLOCK (&type_rw_lock);
3102 type = G_TYPE_MAKE_FUNDAMENTAL (type);
3103 return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
3107 g_type_fundamental (GType type_id)
3109 TypeNode *node = lookup_type_node_I (type_id);
3111 return node ? NODE_FUNDAMENTAL_TYPE (node) : 0;
3115 g_type_check_instance_is_a (GTypeInstance *type_instance,
3118 TypeNode *node, *iface;
3121 if (!type_instance || !type_instance->g_class)
3124 node = lookup_type_node_I (type_instance->g_class->g_type);
3125 iface = lookup_type_node_I (iface_type);
3126 check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
3132 g_type_check_class_is_a (GTypeClass *type_class,
3135 TypeNode *node, *iface;
3141 node = lookup_type_node_I (type_class->g_type);
3142 iface = lookup_type_node_I (is_a_type);
3143 check = node && node->is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
3149 g_type_check_instance_cast (GTypeInstance *type_instance,
3154 if (type_instance->g_class)
3156 TypeNode *node, *iface;
3157 gboolean is_instantiatable, check;
3159 node = lookup_type_node_I (type_instance->g_class->g_type);
3160 is_instantiatable = node && node->is_instantiatable;
3161 iface = lookup_type_node_I (iface_type);
3162 check = is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
3164 return type_instance;
3166 if (is_instantiatable)
3167 g_warning ("invalid cast from `%s' to `%s'",
3168 type_descriptive_name_I (type_instance->g_class->g_type),
3169 type_descriptive_name_I (iface_type));
3171 g_warning ("invalid uninstantiatable type `%s' in cast to `%s'",
3172 type_descriptive_name_I (type_instance->g_class->g_type),
3173 type_descriptive_name_I (iface_type));
3176 g_warning ("invalid unclassed pointer in cast to `%s'",
3177 type_descriptive_name_I (iface_type));
3180 return type_instance;
3184 g_type_check_class_cast (GTypeClass *type_class,
3189 TypeNode *node, *iface;
3190 gboolean is_classed, check;
3192 node = lookup_type_node_I (type_class->g_type);
3193 is_classed = node && node->is_classed;
3194 iface = lookup_type_node_I (is_a_type);
3195 check = is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
3200 g_warning ("invalid class cast from `%s' to `%s'",
3201 type_descriptive_name_I (type_class->g_type),
3202 type_descriptive_name_I (is_a_type));
3204 g_warning ("invalid unclassed type `%s' in class cast to `%s'",
3205 type_descriptive_name_I (type_class->g_type),
3206 type_descriptive_name_I (is_a_type));
3209 g_warning ("invalid class cast from (NULL) pointer to `%s'",
3210 type_descriptive_name_I (is_a_type));
3215 g_type_check_instance (GTypeInstance *type_instance)
3217 /* this function is just here to make the signal system
3218 * conveniently elaborated on instance checks
3222 if (type_instance->g_class)
3224 TypeNode *node = lookup_type_node_I (type_instance->g_class->g_type);
3226 if (node && node->is_instantiatable)
3229 g_warning ("instance of invalid non-instantiatable type `%s'",
3230 type_descriptive_name_I (type_instance->g_class->g_type));
3233 g_warning ("instance with invalid (NULL) class pointer");
3236 g_warning ("invalid (NULL) pointer instance");
3241 static inline gboolean
3242 type_check_is_value_type_U (GType type)
3244 GTypeFlags tflags = G_TYPE_FLAG_VALUE_ABSTRACT;
3247 /* common path speed up */
3248 node = lookup_type_node_I (type);
3249 if (node && node->mutatable_check_cache)
3252 G_READ_LOCK (&type_rw_lock);
3256 if (node->data && node->data->common.ref_count > 0 &&
3257 node->data->common.value_table->value_init)
3258 tflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
3259 else if (NODE_IS_IFACE (node))
3263 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
3265 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
3266 TypeNode *prnode = lookup_type_node_I (prtype);
3268 if (prnode->is_instantiatable)
3271 node = lookup_type_node_I (type);
3277 G_READ_UNLOCK (&type_rw_lock);
3279 return !(tflags & G_TYPE_FLAG_VALUE_ABSTRACT);
3283 g_type_check_is_value_type (GType type)
3285 return type_check_is_value_type_U (type);
3289 g_type_check_value (GValue *value)
3291 return value && type_check_is_value_type_U (value->g_type);
3295 g_type_check_value_holds (GValue *value,
3298 return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
3302 g_type_value_table_peek (GType type)
3304 GTypeValueTable *vtable = NULL;
3305 TypeNode *node = lookup_type_node_I (type);
3306 gboolean has_refed_data, has_table;
3309 /* speed up common code path, we're not 100% safe here,
3310 * but we should only get called with referenced types anyway
3312 data = node ? node->data : NULL;
3313 if (node && node->mutatable_check_cache)
3314 return data->common.value_table;
3316 G_READ_LOCK (&type_rw_lock);
3319 has_refed_data = node && node->data && node->data->common.ref_count;
3320 has_table = has_refed_data && node->data->common.value_table->value_init;
3324 vtable = node->data->common.value_table;
3325 else if (NODE_IS_IFACE (node))
3329 for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
3331 GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
3332 TypeNode *prnode = lookup_type_node_I (prtype);
3334 if (prnode->is_instantiatable)
3337 node = lookup_type_node_I (type);
3338 goto restart_table_peek;
3344 G_READ_UNLOCK (&type_rw_lock);
3350 g_warning (G_STRLOC ": type id `%lu' is invalid", type);
3351 if (!has_refed_data)
3352 g_warning ("can't peek value table for type `%s' which is not currently referenced",
3353 type_descriptive_name_I (type));
3358 G_CONST_RETURN gchar*
3359 g_type_name_from_instance (GTypeInstance *instance)
3362 return "<NULL-instance>";
3364 return g_type_name_from_class (instance->g_class);
3367 G_CONST_RETURN gchar*
3368 g_type_name_from_class (GTypeClass *g_class)
3371 return "<NULL-class>";
3373 return g_type_name (g_class->g_type);
3377 /* --- initialization --- */
3379 g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
3381 G_LOCK_DEFINE_STATIC (type_init_lock);
3382 const gchar *env_string;
3387 G_LOCK (type_init_lock);
3389 G_WRITE_LOCK (&type_rw_lock);
3391 if (static_quark_type_flags)
3393 G_WRITE_UNLOCK (&type_rw_lock);
3394 G_UNLOCK (type_init_lock);
3398 /* setup GObject library wide debugging flags */
3399 _g_type_debug_flags = debug_flags & G_TYPE_DEBUG_MASK;
3400 env_string = g_getenv ("GOBJECT_DEBUG");
3401 if (env_string != NULL)
3403 static GDebugKey debug_keys[] = {
3404 { "objects", G_TYPE_DEBUG_OBJECTS },
3405 { "signals", G_TYPE_DEBUG_SIGNALS },
3408 _g_type_debug_flags |= g_parse_debug_string (env_string,
3410 sizeof (debug_keys) / sizeof (debug_keys[0]));
3415 static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
3416 static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
3417 static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
3419 /* type qname hash table */
3420 static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
3422 /* invalid type G_TYPE_INVALID (0)
3424 static_fundamental_type_nodes[0] = NULL;
3426 /* void type G_TYPE_NONE
3428 node = type_node_fundamental_new_W (G_TYPE_NONE, "void", 0);
3429 type = NODE_TYPE (node);
3430 g_assert (type == G_TYPE_NONE);
3432 /* interface fundamental type G_TYPE_INTERFACE (!classed)
3434 memset (&info, 0, sizeof (info));
3435 node = type_node_fundamental_new_W (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
3436 type = NODE_TYPE (node);
3437 type_data_make_W (node, &info, NULL);
3438 g_assert (type == G_TYPE_INTERFACE);
3440 G_WRITE_UNLOCK (&type_rw_lock);
3444 /* G_TYPE_TYPE_PLUGIN
3446 g_type_plugin_get_type ();
3448 /* G_TYPE_* value types
3450 g_value_types_init ();
3452 /* G_TYPE_ENUM & G_TYPE_FLAGS
3454 g_enum_types_init ();
3458 g_boxed_type_init ();
3462 g_param_type_init ();
3466 g_object_type_init ();
3468 /* G_TYPE_PARAM_* pspec types
3470 g_param_spec_types_init ();
3472 /* Value Transformations
3474 g_value_transforms_init ();
3480 G_UNLOCK (type_init_lock);
3486 g_type_init_with_debug_flags (0);
3490 g_type_class_add_private (gpointer g_class,
3493 GType instance_type = ((GTypeClass *)g_class)->g_type;
3494 TypeNode *node = lookup_type_node_I (instance_type);
3497 if (!node || !node->is_instantiatable || !node->data || node->data->class.class != g_class)
3499 g_warning ("cannot add private field to invalid (non-instantiatable) type '%s'",
3500 type_descriptive_name_I (instance_type));
3504 if (NODE_PARENT_TYPE (node))
3506 TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
3507 if (node->data->instance.private_size != pnode->data->instance.private_size)
3509 g_warning ("g_type_add_private() called multiple times for the same type");
3514 G_WRITE_LOCK (&type_rw_lock);
3516 offset = ALIGN_STRUCT (node->data->instance.private_size);
3517 node->data->instance.private_size = offset + private_size;
3519 G_WRITE_UNLOCK (&type_rw_lock);
3523 g_type_instance_get_private (GTypeInstance *instance,
3526 TypeNode *instance_node;
3527 TypeNode *private_node;
3528 TypeNode *parent_node;
3532 g_return_val_if_fail (instance != NULL && instance->g_class != NULL, NULL);
3534 /* while instances are initialized, their class pointers change,
3535 * so figure the instances real class first
3537 if (instance_real_class_bsa)
3539 class = instance_real_class_get (instance);
3541 class = instance->g_class;
3544 class = instance->g_class;
3546 instance_node = lookup_type_node_I (class->g_type);
3547 if (G_UNLIKELY (!instance_node || !instance_node->is_instantiatable))
3549 g_warning ("instance of invalid non-instantiatable type `%s'",
3550 type_descriptive_name_I (instance->g_class->g_type));
3554 private_node = lookup_type_node_I (private_type);
3555 if (G_UNLIKELY (!private_node || !NODE_IS_ANCESTOR (private_node, instance_node)))
3557 g_warning ("attempt to retrieve private data for invalid type '%s'",
3558 type_descriptive_name_I (private_type));
3562 /* Note that we don't need a read lock, since instance existing
3563 * means that the instance class and all parent classes
3564 * exist, so the node->data, node->data->instance.instance_size,
3565 * and node->data->instance.private_size are not going to be changed.
3566 * for any of the relevant types.
3569 offset = ALIGN_STRUCT (instance_node->data->instance.instance_size);
3571 if (NODE_PARENT_TYPE (private_node))
3573 parent_node = lookup_type_node_I (NODE_PARENT_TYPE (private_node));
3574 g_assert (parent_node->data && parent_node->data->common.ref_count);
3576 if (G_UNLIKELY (private_node->data->instance.private_size == parent_node->data->instance.private_size))
3578 g_warning ("g_type_get_private() requires a prior call to g_type_add_private()");
3582 offset += ALIGN_STRUCT (parent_node->data->instance.private_size);
3585 return G_STRUCT_MEMBER_P (instance, offset);