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glib/gobject/gtype.c
Raja R Harinath 780e6d7e23 Don't return just 0 or 1. 
* gtype.c (g_type_get_plugin): Don't return just 0 or 1.

(Committing because "obvious bug fix")
2000-07-11 20:28:14 +00:00

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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998, 1999, 2000 Tim Janik and Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "gtype.h"
#include <string.h>
#define FIXME_DISABLE_PREALLOCATIONS
/* NOTE: some functions (some internal variants and exported ones)
* invalidate data portions of the TypeNodes. if external functions/callbacks
* are called, pointers to memory maintained by TypeNodes have to be looked up
* again. this affects most of the struct TypeNode fields, e.g. ->children or
* ->iface_entries (not ->supers[] as of recently), as all those memory portions can
* get realloc()ed during callback invocation.
*
* TODO:
* - g_type_from_name() should do an ordered array lookup after fetching the
* the quark, instead of a second hashtable lookup.
*
* FIXME:
* - force interface initialization for already existing classes
*/
#define G_TYPE_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
G_TYPE_FLAG_INSTANTIATABLE | \
G_TYPE_FLAG_DERIVABLE | \
G_TYPE_FLAG_DEEP_DERIVABLE)
#define g_type_plugin_ref(p) ((p)->vtable->plugin_ref (p))
#define g_type_plugin_unref(p) ((p)->vtable->plugin_unref (p))
#define g_type_plugin_complete_type_info(p,t,i,v) ((p)->vtable->complete_type_info ((p), (t), (i), (v)))
#define g_type_plugin_complete_interface_info(p,f,t,i) ((p)->vtable->complete_interface_info ((p), (f), (t), (i)))
typedef struct _TypeNode TypeNode;
typedef struct _CommonData CommonData;
typedef struct _IFaceData IFaceData;
typedef struct _ClassData ClassData;
typedef struct _InstanceData InstanceData;
typedef union _TypeData TypeData;
typedef struct _IFaceEntry IFaceEntry;
typedef struct _IFaceHolder IFaceHolder;
/* --- prototypes --- */
static inline GTypeFundamentalInfo* type_node_fundamental_info (TypeNode *node);
static void type_data_make (TypeNode *node,
const GTypeInfo *info,
const GTypeValueTable *value_table);
static inline void type_data_ref (TypeNode *node);
static inline void type_data_unref (TypeNode *node,
gboolean uncached);
static void type_data_last_unref (GType type,
gboolean uncached);
/* --- structures --- */
struct _TypeNode
{
GTypePlugin *plugin;
guint n_children : 12;
guint n_supers : 8;
guint n_ifaces : 9;
guint is_classed : 1;
guint is_instantiatable : 1;
guint is_iface : 1;
GType *children;
TypeData *data;
GQuark qname;
GData *static_gdata;
union {
IFaceEntry *iface_entries;
IFaceHolder *iface_conformants;
} private;
GType supers[1]; /* flexible array */
};
#define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
#define MAX_N_SUPERS (255)
#define MAX_N_CHILDREN (4095)
#define MAX_N_IFACES (511)
struct _IFaceHolder
{
GType instance_type;
GInterfaceInfo *info;
GTypePlugin *plugin;
IFaceHolder *next;
};
struct _IFaceEntry
{
GType iface_type;
GTypeInterface *vtable;
};
struct _CommonData
{
guint ref_count;
GTypeValueTable *value_table;
};
struct _IFaceData
{
CommonData common;
guint16 vtable_size;
GBaseInitFunc vtable_init_base;
GBaseFinalizeFunc vtable_finalize_base;
};
struct _ClassData
{
CommonData common;
guint16 class_size;
GBaseInitFunc class_init_base;
GBaseFinalizeFunc class_finalize_base;
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
gpointer class;
};
struct _InstanceData
{
CommonData common;
guint16 class_size;
GBaseInitFunc class_init_base;
GBaseFinalizeFunc class_finalize_base;
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
gpointer class;
guint16 instance_size;
guint16 n_preallocs;
GInstanceInitFunc instance_init;
GMemChunk *mem_chunk;
};
union _TypeData
{
CommonData common;
IFaceData iface;
ClassData class;
InstanceData instance;
};
typedef struct {
gpointer cache_data;
GTypeClassCacheFunc cache_func;
} ClassCacheFunc;
/* --- variables --- */
static guint n_class_cache_funcs = 0;
static ClassCacheFunc *class_cache_funcs = NULL;
/* --- externs --- */
const char *g_log_domain_gobject = "GLib-Object";
GOBJECT_VAR GType _g_type_fundamental_last = 0;
/* --- type nodes --- */
static GHashTable *g_type_nodes_ht = NULL;
static GType *g_branch_seqnos = NULL;
static TypeNode ***g_type_nodes = NULL;
static inline TypeNode*
LOOKUP_TYPE_NODE (register GType utype)
{
register GType ftype = G_TYPE_FUNDAMENTAL (utype);
register GType b_seqno = G_TYPE_BRANCH_SEQNO (utype);
if (ftype < G_TYPE_FUNDAMENTAL_LAST && b_seqno < g_branch_seqnos[ftype])
return g_type_nodes[ftype][b_seqno];
else
return NULL;
}
#define NODE_TYPE(node) (node->supers[0])
#define NODE_PARENT_TYPE(node) (node->supers[1])
#define NODE_NAME(node) (g_quark_to_string (node->qname))
static TypeNode*
type_node_any_new (TypeNode *pnode,
GType ftype,
const gchar *name,
GTypePlugin *plugin,
GTypeFlags type_flags)
{
guint branch_last, n_supers = pnode ? pnode->n_supers + 1 : 0;
GType type;
TypeNode *node;
guint i, node_size = 0;
branch_last = g_branch_seqnos[ftype]++;
type = G_TYPE_DERIVE_ID (ftype, branch_last);
if (!branch_last || g_bit_storage (branch_last - 1) < g_bit_storage (g_branch_seqnos[ftype] - 1))
g_type_nodes[ftype] = g_renew (TypeNode*, g_type_nodes[ftype], 1 << g_bit_storage (g_branch_seqnos[ftype] - 1));
if (!pnode)
node_size += sizeof (GTypeFundamentalInfo); /* fundamental type info */
node_size += SIZEOF_BASE_TYPE_NODE (); /* TypeNode structure */
node_size += (sizeof (GType) * (1 + n_supers + 1)); /* self + ancestors + 0 for ->supers[] */
node = g_malloc0 (node_size);
if (!pnode) /* fundamental type */
node = G_STRUCT_MEMBER_P (node, sizeof (GTypeFundamentalInfo));
g_type_nodes[ftype][branch_last] = node;
node->n_supers = n_supers;
if (!pnode)
{
node->supers[0] = type;
node->supers[1] = 0;
node->is_classed = (type_flags & G_TYPE_FLAG_CLASSED) != 0;
node->is_instantiatable = (type_flags & G_TYPE_FLAG_INSTANTIATABLE) != 0;
node->is_iface = G_TYPE_IS_INTERFACE (type);
node->n_ifaces = 0;
if (node->is_iface)
node->private.iface_conformants = NULL;
else
node->private.iface_entries = NULL;
}
else
{
node->supers[0] = type;
memcpy (node->supers + 1, pnode->supers, sizeof (GType) * (1 + pnode->n_supers + 1));
node->is_classed = pnode->is_classed;
node->is_instantiatable = pnode->is_instantiatable;
node->is_iface = pnode->is_iface;
if (node->is_iface)
{
node->n_ifaces = 0;
node->private.iface_conformants = NULL;
}
else
{
node->n_ifaces = pnode->n_ifaces;
node->private.iface_entries = g_memdup (pnode->private.iface_entries,
sizeof (pnode->private.iface_entries[0]) * node->n_ifaces);
}
i = pnode->n_children++;
pnode->children = g_renew (GType, pnode->children, pnode->n_children);
pnode->children[i] = type;
}
node->plugin = plugin;
node->n_children = 0;
node->children = NULL;
node->data = NULL;
node->qname = g_quark_from_string (name);
node->static_gdata = NULL;
g_hash_table_insert (g_type_nodes_ht,
GUINT_TO_POINTER (node->qname),
GUINT_TO_POINTER (type));
return node;
}
static inline GTypeFundamentalInfo*
type_node_fundamental_info (TypeNode *node)
{
GType ftype = G_TYPE_FUNDAMENTAL (NODE_TYPE (node));
if (ftype != NODE_TYPE (node))
node = LOOKUP_TYPE_NODE (ftype);
return node ? G_STRUCT_MEMBER_P (node, - sizeof (GTypeFundamentalInfo)) : NULL;
}
static TypeNode*
type_node_fundamental_new (GType ftype,
const gchar *name,
GTypeFlags type_flags)
{
GTypeFundamentalInfo *finfo;
TypeNode *node;
guint i, flast = G_TYPE_FUNDAMENTAL_LAST;
g_assert (ftype == G_TYPE_FUNDAMENTAL (ftype));
type_flags &= G_TYPE_FLAG_MASK;
_g_type_fundamental_last = MAX (_g_type_fundamental_last, ftype + 1);
if (G_TYPE_FUNDAMENTAL_LAST > flast)
{
g_type_nodes = g_renew (TypeNode**, g_type_nodes, G_TYPE_FUNDAMENTAL_LAST);
g_branch_seqnos = g_renew (GType, g_branch_seqnos, G_TYPE_FUNDAMENTAL_LAST);
for (i = flast; i < G_TYPE_FUNDAMENTAL_LAST; i++)
{
g_type_nodes[i] = NULL;
g_branch_seqnos[i] = 0;
}
}
g_assert (g_branch_seqnos[ftype] == 0);
node = type_node_any_new (NULL, ftype, name, NULL, type_flags);
finfo = type_node_fundamental_info (node);
finfo->type_flags = type_flags;
return node;
}
static TypeNode*
type_node_new (TypeNode *pnode,
const gchar *name,
GTypePlugin *plugin)
{
g_assert (pnode);
g_assert (pnode->n_supers < MAX_N_SUPERS);
g_assert (pnode->n_children < MAX_N_CHILDREN);
return type_node_any_new (pnode, G_TYPE_FUNDAMENTAL (NODE_TYPE (pnode)), name, plugin, 0);
}
static inline IFaceEntry*
type_lookup_iface_entry (TypeNode *node,
TypeNode *iface)
{
if (iface->is_iface && node->n_ifaces)
{
IFaceEntry *ifaces = node->private.iface_entries - 1;
guint n_ifaces = node->n_ifaces;
GType iface_type = NODE_TYPE (iface);
do /* FIXME: should optimize iface lookups for <= 4 */
{
guint i;
IFaceEntry *check;
i = (n_ifaces + 1) / 2;
check = ifaces + i;
if (iface_type == check->iface_type)
return check;
else if (iface_type > check->iface_type)
{
n_ifaces -= i;
ifaces = check;
}
else /* if (iface_type < check->iface_type) */
n_ifaces = i - 1;
}
while (n_ifaces);
}
return NULL;
}
static inline gchar*
type_descriptive_name (GType type)
{
if (type)
{
gchar *name = g_type_name (type);
return name ? name : "<unknown>";
}
else
return "<invalid>";
}
/* --- type consistency checks --- */
static gboolean
check_plugin (GTypePlugin *plugin,
gboolean need_complete_type_info,
gboolean need_complete_interface_info,
const gchar *type_name)
{
if (!plugin)
{
g_warning ("plugin handle for type `%s' is NULL",
type_name);
return FALSE;
}
if (!plugin->vtable)
{
g_warning ("plugin for type `%s' has no function table",
type_name);
return FALSE;
}
if (!plugin->vtable->plugin_ref)
{
g_warning ("plugin for type `%s' has no plugin_ref() implementation",
type_name);
return FALSE;
}
if (!plugin->vtable->plugin_unref)
{
g_warning ("plugin for type `%s' has no plugin_unref() implementation",
type_name);
return FALSE;
}
if (need_complete_type_info && !plugin->vtable->complete_type_info)
{
g_warning ("plugin for type `%s' has no complete_type_info() implementation",
type_name);
return FALSE;
}
if (need_complete_interface_info && !plugin->vtable->complete_interface_info)
{
g_warning ("plugin for type `%s' has no complete_interface_info() implementation",
type_name);
return FALSE;
}
return TRUE;
}
static gboolean
check_type_name (const gchar *type_name)
{
static const gchar *extra_chars = "-_+";
const gchar *p = type_name;
gboolean name_valid;
if (!type_name[0] || !type_name[1] || !type_name[2])
{
g_warning ("type name `%s' is too short", type_name);
return FALSE;
}
/* check the first letter */
name_valid = (p[0] >= 'A' && p[0] <= 'Z') || (p[0] >= 'a' && p[0] <= 'z') || p[0] == '_';
for (p = type_name + 1; *p; p++)
name_valid &= ((p[0] >= 'A' && p[0] <= 'Z') ||
(p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= '0' && p[0] <= '9') ||
strchr (extra_chars, p[0]));
if (!name_valid)
{
g_warning ("type name `%s' contains invalid characters", type_name);
return FALSE;
}
if (g_type_from_name (type_name))
{
g_warning ("cannot register existing type `%s'", type_name);
return FALSE;
}
return TRUE;
}
static gboolean
check_derivation (GType parent_type,
const gchar *type_name)
{
TypeNode *pnode = LOOKUP_TYPE_NODE (parent_type);
GTypeFundamentalInfo* finfo = type_node_fundamental_info (pnode);
if (!pnode)
{
g_warning ("cannot derive type `%s' from invalid parent type `%s'",
type_name,
type_descriptive_name (parent_type));
return FALSE;
}
/* ensure flat derivability */
if (!(finfo->type_flags & G_TYPE_FLAG_DERIVABLE))
{
g_warning ("cannot derive `%s' from non-derivable parent type `%s'",
type_name,
NODE_NAME (pnode));
return FALSE;
}
/* ensure deep derivability */
if (parent_type != G_TYPE_FUNDAMENTAL (parent_type) &&
!(finfo->type_flags & G_TYPE_FLAG_DEEP_DERIVABLE))
{
g_warning ("cannot derive `%s' from non-fundamental parent type `%s'",
type_name,
NODE_NAME (pnode));
return FALSE;
}
return TRUE;
}
static gboolean
check_value_table (const gchar *type_name,
const GTypeValueTable *value_table)
{
if (!value_table)
return FALSE;
else if (value_table->value_init == NULL)
{
if (value_table->value_free || value_table->value_copy ||
value_table->collect_type || value_table->collect_value ||
value_table->lcopy_type || value_table->lcopy_value)
g_warning ("cannot handle uninitializable values of type `%s'",
type_name);
return FALSE;
}
else /* value_table->value_init != NULL */
{
if (!value_table->value_free)
{
/* +++ optional +++
* g_warning ("missing `value_free()' for type `%s'", type_name);
* return FALSE;
*/
}
if (!value_table->value_copy)
{
g_warning ("missing `value_copy()' for type `%s'", type_name);
return FALSE;
}
if ((value_table->collect_type || value_table->collect_value) &&
(!value_table->collect_type || !value_table->collect_value))
{
g_warning ("one of `collect_type' and `collect_value()' is unspecified for type `%s'",
type_name);
return FALSE;
}
if ((value_table->lcopy_type || value_table->lcopy_value) &&
(!value_table->lcopy_type || !value_table->lcopy_value))
{
g_warning ("one of `lcopy_type' and `lcopy_value()' is unspecified for type `%s'",
type_name);
return FALSE;
}
}
return TRUE;
}
static gboolean
check_type_info (TypeNode *pnode,
GType ftype,
const gchar *type_name,
const GTypeInfo *info)
{
GTypeFundamentalInfo *finfo = type_node_fundamental_info (LOOKUP_TYPE_NODE (ftype));
gboolean is_interface = G_TYPE_IS_INTERFACE (ftype);
/* check instance members */
if (!(finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
(info->instance_size || info->n_preallocs || info->instance_init))
{
if (pnode)
g_warning ("cannot instantiate `%s', derived from non-instantiatable parent type `%s'",
type_name,
NODE_NAME (pnode));
else
g_warning ("cannot instantiate `%s' as non-instantiatable fundamental",
type_name);
return FALSE;
}
/* check class & interface members */
if (!(finfo->type_flags & G_TYPE_FLAG_CLASSED) &&
(info->class_init || info->class_finalize || info->class_data ||
(!is_interface && (info->class_size || info->base_init || info->base_finalize))))
{
if (pnode)
g_warning ("cannot create class for `%s', derived from non-classed parent type `%s'",
type_name,
NODE_NAME (pnode));
else
g_warning ("cannot create class for `%s' as non-classed fundamental",
type_name);
return FALSE;
}
/* check interface size */
if (is_interface && info->class_size < sizeof (GTypeInterface))
{
g_warning ("specified interface size for type `%s' is smaller than `GTypeInterface' size",
type_name);
return FALSE;
}
/* check class size */
if (finfo->type_flags & G_TYPE_FLAG_CLASSED)
{
if (info->class_size < sizeof (GTypeClass))
{
g_warning ("specified class size for type `%s' is smaller than `GTypeClass' size",
type_name);
return FALSE;
}
if (pnode && info->class_size < pnode->data->class.class_size)
{
g_warning ("specified class size for type `%s' is smaller "
"than the parent type's `%s' class size",
type_name,
NODE_NAME (pnode));
return FALSE;
}
}
/* check instance size */
if (finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE)
{
if (info->instance_size < sizeof (GTypeInstance))
{
g_warning ("specified instance size for type `%s' is smaller than `GTypeInstance' size",
type_name);
return FALSE;
}
if (pnode && info->instance_size < pnode->data->instance.instance_size)
{
g_warning ("specified instance size for type `%s' is smaller "
"than the parent type's `%s' instance size",
type_name,
NODE_NAME (pnode));
return FALSE;
}
}
return TRUE;
}
static TypeNode*
find_conforming_type (TypeNode *pnode,
TypeNode *iface)
{
TypeNode *node = NULL;
guint i;
if (type_lookup_iface_entry (pnode, iface))
return pnode;
for (i = 0; i < pnode->n_children && !node; i++)
node = find_conforming_type (LOOKUP_TYPE_NODE (pnode->children[i]), iface);
return node;
}
static gboolean
check_add_interface (GType instance_type,
GType iface_type)
{
TypeNode *node = LOOKUP_TYPE_NODE (instance_type);
TypeNode *iface = LOOKUP_TYPE_NODE (iface_type);
TypeNode *tnode;
if (!node || !node->is_instantiatable)
{
g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
type_descriptive_name (instance_type));
return FALSE;
}
if (!iface || !iface->is_iface)
{
g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
type_descriptive_name (iface_type),
NODE_NAME (node));
return FALSE;
}
tnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (iface));
if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry (node, tnode))
{
g_warning ("cannot add sub-interface `%s' to type `%s' which does not conform to super-interface `%s'",
NODE_NAME (iface),
NODE_NAME (node),
NODE_NAME (tnode));
return FALSE;
}
tnode = find_conforming_type (node, iface);
if (tnode)
{
g_warning ("cannot add interface type `%s' to type `%s', since type `%s' already conforms to interface",
NODE_NAME (iface),
NODE_NAME (node),
NODE_NAME (tnode));
return FALSE;
}
return TRUE;
}
static gboolean
check_interface_info (TypeNode *iface,
GType instance_type,
const GInterfaceInfo *info)
{
if ((info->interface_finalize || info->interface_data) && !info->interface_init)
{
g_warning ("interface type `%s' for type `%s' comes without initializer",
NODE_NAME (iface),
type_descriptive_name (instance_type));
return FALSE;
}
return TRUE;
}
/* --- type info (type node data) --- */
static void
type_data_make (TypeNode *node,
const GTypeInfo *info,
const GTypeValueTable *value_table)
{
TypeData *data;
GTypeValueTable *vtable = NULL;
guint vtable_size = 0;
g_assert (node->data == NULL && info != NULL);
if (!value_table)
{
TypeNode *pnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (node));
if (pnode)
vtable = pnode->data->common.value_table;
else
{
static const GTypeValueTable zero_vtable = { NULL, };
value_table = &zero_vtable;
}
}
if (value_table)
vtable_size = sizeof (GTypeValueTable);
if (node->is_instantiatable) /* carefull, is_instantiatable is also is_classed */
{
data = g_malloc0 (sizeof (InstanceData) + vtable_size);
if (vtable_size)
vtable = G_STRUCT_MEMBER_P (data, sizeof (InstanceData));
data->instance.class_size = info->class_size;
data->instance.class_init_base = info->base_init;
data->instance.class_finalize_base = info->base_finalize;
data->instance.class_init = info->class_init;
data->instance.class_finalize = info->class_finalize;
data->instance.class_data = info->class_data;
data->instance.class = NULL;
data->instance.instance_size = info->instance_size;
data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
#ifdef FIXME_DISABLE_PREALLOCATIONS
data->instance.n_preallocs = 0;
#endif
data->instance.instance_init = info->instance_init;
data->instance.mem_chunk = NULL;
}
else if (node->is_classed) /* only classed */
{
data = g_malloc0 (sizeof (ClassData) + vtable_size);
if (vtable_size)
vtable = G_STRUCT_MEMBER_P (data, sizeof (ClassData));
data->class.class_size = info->class_size;
data->class.class_init_base = info->base_init;
data->class.class_finalize_base = info->base_finalize;
data->class.class_init = info->class_init;
data->class.class_finalize = info->class_finalize;
data->class.class_data = info->class_data;
data->class.class = NULL;
}
else if (node->is_iface)
{
data = g_malloc0 (sizeof (IFaceData) + vtable_size);
if (vtable_size)
vtable = G_STRUCT_MEMBER_P (data, sizeof (IFaceData));
data->iface.vtable_size = info->class_size;
data->iface.vtable_init_base = info->base_init;
data->iface.vtable_finalize_base = info->base_finalize;
}
else
{
data = g_malloc0 (sizeof (CommonData) + vtable_size);
if (vtable_size)
vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
}
node->data = data;
node->data->common.ref_count = 1;
if (vtable_size)
*vtable = *value_table;
node->data->common.value_table = vtable;
g_assert (node->data->common.value_table != NULL); // FIXME: paranoid
}
static inline void
type_data_ref (TypeNode *node)
{
if (!node->data)
{
TypeNode *pnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (node));
GTypeInfo tmp_info;
GTypeValueTable tmp_value_table;
g_assert (node->plugin != NULL);
if (pnode)
type_data_ref (pnode);
memset (&tmp_info, 0, sizeof (tmp_info));
memset (&tmp_value_table, 0, sizeof (tmp_value_table));
g_type_plugin_ref (node->plugin);
g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
check_type_info (pnode, G_TYPE_FUNDAMENTAL (NODE_TYPE (node)), NODE_NAME (node), &tmp_info);
type_data_make (node, &tmp_info,
check_value_table (NODE_NAME (node), &tmp_value_table) ? &tmp_value_table : NULL);
}
else
{
g_assert (node->data->common.ref_count > 0);
node->data->common.ref_count += 1;
}
}
static inline void
type_data_unref (TypeNode *node,
gboolean uncached)
{
g_assert (node->data && node->data->common.ref_count);
if (node->data->common.ref_count > 1)
node->data->common.ref_count -= 1;
else
{
if (!node->plugin)
{
g_warning ("static type `%s' unreferenced too often",
NODE_NAME (node));
return;
}
type_data_last_unref (NODE_TYPE (node), uncached);
}
}
static void
type_node_add_iface_entry (TypeNode *node,
GType iface_type)
{
IFaceEntry *entries;
guint i;
g_assert (node->is_instantiatable && node->n_ifaces < MAX_N_IFACES);
node->n_ifaces++;
node->private.iface_entries = g_renew (IFaceEntry, node->private.iface_entries, node->n_ifaces);
entries = node->private.iface_entries;
for (i = 0; i < node->n_ifaces - 1; i++)
if (entries[i].iface_type > iface_type)
break;
g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (node->n_ifaces - i - 1));
entries[i].iface_type = iface_type;
entries[i].vtable = NULL;
for (i = 0; i < node->n_children; i++)
type_node_add_iface_entry (LOOKUP_TYPE_NODE (node->children[i]), iface_type);
}
static void
type_add_interface (TypeNode *node,
TypeNode *iface,
GInterfaceInfo *info,
GTypePlugin *plugin)
{
IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
/* we must not call any functions of GInterfaceInfo from within here, since
* we got most probably called from _within_ a type registration function
*/
g_assert (node->is_instantiatable && iface->is_iface && ((info && !plugin) || (!info && plugin)));
iholder->next = iface->private.iface_conformants;
iface->private.iface_conformants = iholder;
iholder->instance_type = NODE_TYPE (node);
iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
iholder->plugin = plugin;
type_node_add_iface_entry (node, NODE_TYPE (iface));
}
static IFaceHolder*
type_iface_retrive_holder_info (TypeNode *iface,
GType instance_type)
{
IFaceHolder *iholder = iface->private.iface_conformants;
g_assert (iface->is_iface);
while (iholder->instance_type != instance_type)
iholder = iholder->next;
if (!iholder->info)
{
GInterfaceInfo tmp_info;
g_assert (iholder->plugin != NULL);
type_data_ref (iface);
memset (&tmp_info, 0, sizeof (tmp_info));
g_type_plugin_ref (iholder->plugin);
g_type_plugin_complete_interface_info (iholder->plugin, NODE_TYPE (iface), instance_type, &tmp_info);
check_interface_info (iface, instance_type, &tmp_info);
iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
}
return iholder;
}
static void
type_iface_blow_holder_info (TypeNode *iface,
GType instance_type)
{
IFaceHolder *iholder = iface->private.iface_conformants;
g_assert (iface->is_iface);
while (iholder->instance_type != instance_type)
iholder = iholder->next;
if (iholder->info && iholder->plugin)
{
g_free (iholder->info);
iholder->info = NULL;
g_type_plugin_unref (iholder->plugin);
type_data_unref (iface, FALSE);
}
}
/* --- type structure creation/destruction --- */
GTypeInstance*
g_type_create_instance (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
GTypeInstance *instance;
GTypeClass *class;
guint i;
if (!node || !node->is_instantiatable)
{
g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
type_descriptive_name (type));
return NULL;
}
class = g_type_class_ref (type);
if (node->data->instance.n_preallocs)
{
if (!node->data->instance.mem_chunk)
node->data->instance.mem_chunk = g_mem_chunk_new (NODE_NAME (node),
node->data->instance.instance_size,
(node->data->instance.instance_size *
node->data->instance.n_preallocs),
G_ALLOC_AND_FREE);
instance = g_chunk_new0 (GTypeInstance, node->data->instance.mem_chunk);
}
else
instance = g_malloc0 (node->data->instance.instance_size);
for (i = node->n_supers; i > 0; i--)
{
TypeNode *pnode = LOOKUP_TYPE_NODE (node->supers[i]);
if (pnode->data->instance.instance_init)
{
instance->g_class = pnode->data->instance.class;
pnode->data->instance.instance_init (instance, class);
}
}
instance->g_class = class;
if (node->data->instance.instance_init)
node->data->instance.instance_init (instance, class);
return instance;
}
void
g_type_free_instance (GTypeInstance *instance)
{
TypeNode *node;
GTypeClass *class;
g_return_if_fail (instance != NULL && instance->g_class != NULL);
class = instance->g_class;
node = LOOKUP_TYPE_NODE (class->g_type);
if (!node || !node->is_instantiatable || !node->data || node->data->class.class != (gpointer) class)
{
g_warning ("cannot free instance of invalid (non-instantiatable) type `%s'",
type_descriptive_name (class->g_type));
return;
}
instance->g_class = NULL;
if (node->data->instance.n_preallocs)
g_chunk_free (instance, node->data->instance.mem_chunk);
else
g_free (instance);
g_type_class_unref (class);
}
static void
type_propagate_iface_vtable (TypeNode *pnode,
TypeNode *iface,
GTypeInterface *vtable)
{
IFaceEntry *entry = type_lookup_iface_entry (pnode, iface);
guint i;
entry->vtable = vtable;
for (i = 0; i < pnode->n_children; i++)
{
TypeNode *node = LOOKUP_TYPE_NODE (pnode->children[i]);
type_propagate_iface_vtable (node, iface, vtable);
}
}
static void
type_iface_vtable_init (TypeNode *iface,
TypeNode *node)
{
IFaceEntry *entry = type_lookup_iface_entry (node, iface);
IFaceHolder *iholder = type_iface_retrive_holder_info (iface, NODE_TYPE (node));
GTypeInterface *vtable;
g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
vtable = g_malloc0 (iface->data->iface.vtable_size);
type_propagate_iface_vtable (node, iface, vtable);
vtable->g_type = NODE_TYPE (iface);
vtable->g_instance_type = NODE_TYPE (node);
if (iface->data->iface.vtable_init_base)
iface->data->iface.vtable_init_base (vtable);
if (iholder->info->interface_init)
iholder->info->interface_init (vtable, iholder->info->interface_data);
}
static void
type_iface_vtable_finalize (TypeNode *iface,
TypeNode *node,
GTypeInterface *vtable)
{
IFaceEntry *entry = type_lookup_iface_entry (node, iface);
IFaceHolder *iholder = iface->private.iface_conformants;
g_assert (entry && entry->vtable == vtable);
while (iholder->instance_type != NODE_TYPE (node))
iholder = iholder->next;
g_assert (iholder && iholder->info);
type_propagate_iface_vtable (node, iface, NULL);
if (iholder->info->interface_finalize)
iholder->info->interface_finalize (vtable, iholder->info->interface_data);
if (iface->data->iface.vtable_finalize_base)
iface->data->iface.vtable_finalize_base (vtable);
vtable->g_type = 0;
vtable->g_instance_type = 0;
g_free (vtable);
type_iface_blow_holder_info (iface, NODE_TYPE (node));
}
static void
type_class_init (TypeNode *node,
GTypeClass *pclass)
{
GSList *slist, *init_slist = NULL;
GTypeClass *class;
IFaceEntry *entry;
TypeNode *bnode;
guint i;
g_assert (node->is_classed && node->data &&
node->data->class.class_size &&
!node->data->class.class);
class = g_malloc0 (node->data->class.class_size);
node->data->class.class = class;
if (pclass)
{
TypeNode *pnode = LOOKUP_TYPE_NODE (pclass->g_type);
memcpy (class, pclass, pnode->data->class.class_size);
}
class->g_type = NODE_TYPE (node);
/* stack all base class initialization functions, so we
* call them in ascending order.
*/
for (bnode = node; bnode; bnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (bnode)))
if (bnode->data->class.class_init_base)
init_slist = g_slist_prepend (init_slist, bnode->data->class.class_init_base);
for (slist = init_slist; slist; slist = slist->next)
{
GBaseInitFunc class_init_base = slist->data;
class_init_base (class);
}
g_slist_free (init_slist);
if (node->data->class.class_init)
node->data->class.class_init (class, (gpointer) node->data->class.class_data);
/* ok, we got the class done, now initialize all interfaces */
for (entry = NULL, i = 0; i < node->n_ifaces; i++)
if (!node->private.iface_entries[i].vtable)
entry = node->private.iface_entries + i;
while (entry)
{
type_iface_vtable_init (LOOKUP_TYPE_NODE (entry->iface_type), node);
for (entry = NULL, i = 0; i < node->n_ifaces; i++)
if (!node->private.iface_entries[i].vtable)
entry = node->private.iface_entries + i;
}
}
static void
type_data_finalize_class_ifaces (TypeNode *node)
{
IFaceEntry *entry;
guint i;
g_assert (node->is_instantiatable && node->data && node->data->class.class && node->data->common.ref_count == 0);
g_message ("finalizing interfaces for %sClass `%s'",
type_descriptive_name (G_TYPE_FUNDAMENTAL (NODE_TYPE (node))),
type_descriptive_name (NODE_TYPE (node)));
for (entry = NULL, i = 0; i < node->n_ifaces; i++)
if (node->private.iface_entries[i].vtable &&
node->private.iface_entries[i].vtable->g_instance_type == NODE_TYPE (node))
entry = node->private.iface_entries + i;
while (entry)
{
type_iface_vtable_finalize (LOOKUP_TYPE_NODE (entry->iface_type), node, entry->vtable);
for (entry = NULL, i = 0; i < node->n_ifaces; i++)
if (node->private.iface_entries[i].vtable &&
node->private.iface_entries[i].vtable->g_instance_type == NODE_TYPE (node))
entry = node->private.iface_entries + i;
}
}
static void
type_data_finalize_class (TypeNode *node,
ClassData *cdata)
{
GTypeClass *class = cdata->class;
TypeNode *bnode;
g_assert (cdata->class && cdata->common.ref_count == 0);
g_message ("finalizing %sClass `%s'",
type_descriptive_name (G_TYPE_FUNDAMENTAL (NODE_TYPE (node))),
type_descriptive_name (NODE_TYPE (node)));
if (cdata->class_finalize)
cdata->class_finalize (class, (gpointer) cdata->class_data);
/* call all base class destruction functions in descending order
*/
if (cdata->class_finalize_base)
cdata->class_finalize_base (class);
for (bnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (node)); bnode; bnode = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (bnode)))
if (bnode->data->class.class_finalize_base)
bnode->data->class.class_finalize_base (class);
class->g_type = 0;
g_free (cdata->class);
}
static void
type_data_last_unref (GType type,
gboolean uncached)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
g_return_if_fail (node != NULL && node->plugin != NULL);
if (!node->data || node->data->common.ref_count == 0)
{
g_warning ("cannot drop last reference to unreferenced type `%s'",
type_descriptive_name (type));
return;
}
if (node->is_classed && node->data && node->data->class.class)
{
guint i;
for (i = 0; i < n_class_cache_funcs; i++)
if (class_cache_funcs[i].cache_func (class_cache_funcs[i].cache_data, node->data->class.class))
break;
}
if (node->data->common.ref_count > 1) /* may have been re-referenced meanwhile */
node->data->common.ref_count -= 1;
else
{
GType ptype = NODE_PARENT_TYPE (node);
TypeData *tdata;
node->data->common.ref_count = 0;
if (node->is_instantiatable && node->data->instance.mem_chunk)
{
g_mem_chunk_destroy (node->data->instance.mem_chunk);
node->data->instance.mem_chunk = NULL;
}
tdata = node->data;
if (node->is_classed && tdata->class.class)
{
if (node->n_ifaces)
type_data_finalize_class_ifaces (node);
node->data = NULL;
type_data_finalize_class (node, &tdata->class);
}
else
node->data = NULL;
g_free (tdata);
if (ptype)
type_data_unref (LOOKUP_TYPE_NODE (ptype), FALSE);
g_type_plugin_unref (node->plugin);
}
}
void
g_type_add_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func)
{
guint i;
g_return_if_fail (cache_func != NULL);
i = n_class_cache_funcs++;
class_cache_funcs = g_renew (ClassCacheFunc, class_cache_funcs, n_class_cache_funcs);
class_cache_funcs[i].cache_data = cache_data;
class_cache_funcs[i].cache_func = cache_func;
}
void
g_type_remove_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func)
{
guint i;
g_return_if_fail (cache_func != NULL);
for (i = 0; i < n_class_cache_funcs; i++)
if (class_cache_funcs[i].cache_data == cache_data &&
class_cache_funcs[i].cache_func == cache_func)
{
n_class_cache_funcs--;
g_memmove (class_cache_funcs + i,
class_cache_funcs + i + 1,
sizeof (class_cache_funcs[0]) * (n_class_cache_funcs - i));
class_cache_funcs = g_renew (ClassCacheFunc, class_cache_funcs, n_class_cache_funcs);
return;
}
g_warning (G_STRLOC ": cannot remove unregistered class cache func %p with data %p",
cache_func, cache_data);
}
/* --- type registration --- */
GType
g_type_register_fundamental (GType type_id,
const gchar *type_name,
const GTypeInfo *info,
const GTypeFundamentalInfo *finfo)
{
GTypeFundamentalInfo *node_finfo;
TypeNode *node;
g_return_val_if_fail (type_id > 0, 0);
g_return_val_if_fail (type_name != NULL, 0);
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (finfo != NULL, 0);
if (!check_type_name (type_name))
return 0;
if (G_TYPE_FUNDAMENTAL (type_id) != type_id)
{
g_warning ("cannot register fundamental type `%s' with non-fundamental id (%u)",
type_name,
type_id);
return 0;
}
if (LOOKUP_TYPE_NODE (type_id))
{
g_warning ("cannot register existing fundamental type `%s' (as `%s')",
type_descriptive_name (type_id),
type_name);
return 0;
}
if ((finfo->type_flags & G_TYPE_FLAG_INSTANTIATABLE) &&
!(finfo->type_flags & G_TYPE_FLAG_CLASSED))
{
g_warning ("cannot register instantiatable fundamental type `%s' as non-classed",
type_name);
return 0;
}
node = type_node_fundamental_new (type_id, type_name, finfo->type_flags);
node_finfo = type_node_fundamental_info (node);
if (!check_type_info (NULL, G_TYPE_FUNDAMENTAL (NODE_TYPE (node)), type_name, info))
return NODE_TYPE (node);
type_data_make (node, info,
check_value_table (type_name, info->value_table) ? info->value_table : NULL);
return NODE_TYPE (node);
}
GType
g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info)
{
TypeNode *pnode, *node;
GType type;
g_return_val_if_fail (parent_type > 0, 0);
g_return_val_if_fail (type_name != NULL, 0);
g_return_val_if_fail (info != NULL, 0);
if (!check_type_name (type_name))
return 0;
if (!check_derivation (parent_type, type_name))
return 0;
pnode = LOOKUP_TYPE_NODE (parent_type);
type_data_ref (pnode);
if (!check_type_info (pnode, G_TYPE_FUNDAMENTAL (parent_type), type_name, info))
return 0;
if (info->class_finalize)
{
g_warning ("class destructor specified for static type `%s'",
type_name);
return 0;
}
node = type_node_new (pnode, type_name, NULL);
type = NODE_TYPE (node);
type_data_make (node, info,
check_value_table (type_name, info->value_table) ? info->value_table : NULL);
return type;
}
GType
g_type_register_dynamic (GType parent_type,
const gchar *type_name,
GTypePlugin *plugin)
{
TypeNode *pnode, *node;
GType type;
g_return_val_if_fail (parent_type > 0, 0);
g_return_val_if_fail (type_name != NULL, 0);
g_return_val_if_fail (plugin != NULL, 0);
if (!check_type_name (type_name))
return 0;
if (!check_derivation (parent_type, type_name))
return 0;
if (!check_plugin (plugin, TRUE, FALSE, type_name))
return 0;
pnode = LOOKUP_TYPE_NODE (parent_type);
node = type_node_new (pnode, type_name, plugin);
type = NODE_TYPE (node);
return type;
}
void
g_type_add_interface_static (GType instance_type,
GType interface_type,
GInterfaceInfo *info)
{
TypeNode *node;
TypeNode *iface;
g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
if (!check_add_interface (instance_type, interface_type))
return;
node = LOOKUP_TYPE_NODE (instance_type);
iface = LOOKUP_TYPE_NODE (interface_type);
if (!check_interface_info (iface, NODE_TYPE (node), info))
return;
type_add_interface (node, iface, info, NULL);
}
void
g_type_add_interface_dynamic (GType instance_type,
GType interface_type,
GTypePlugin *plugin)
{
TypeNode *node;
TypeNode *iface;
g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
if (!check_add_interface (instance_type, interface_type))
return;
node = LOOKUP_TYPE_NODE (instance_type);
iface = LOOKUP_TYPE_NODE (interface_type);
if (!check_plugin (plugin, FALSE, TRUE, NODE_NAME (node)))
return;
type_add_interface (node, iface, NULL, plugin);
}
/* --- public API functions --- */
gpointer
g_type_class_ref (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
/* optimize for common code path
*/
if (node && node->is_classed && node->data &&
node->data->class.class && node->data->common.ref_count > 0)
{
type_data_ref (node);
return node->data->class.class;
}
if (!node || !node->is_classed ||
(node->data && node->data->common.ref_count < 1))
{
g_warning ("cannot retrive class for invalid (unclassed) type `%s'",
type_descriptive_name (type));
return NULL;
}
type_data_ref (node);
if (!node->data->class.class)
{
GType ptype = NODE_PARENT_TYPE (node);
GTypeClass *pclass = ptype ? g_type_class_ref (ptype) : NULL;
type_class_init (node, pclass);
}
return node->data->class.class;
}
void
g_type_class_unref (gpointer g_class)
{
TypeNode *node;
GTypeClass *class = g_class;
g_return_if_fail (g_class != NULL);
node = LOOKUP_TYPE_NODE (class->g_type);
if (node && node->is_classed && node->data &&
node->data->class.class == class && node->data->common.ref_count > 0)
type_data_unref (node, FALSE);
else
g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
type_descriptive_name (class->g_type));
}
void
g_type_class_unref_uncached (gpointer g_class)
{
TypeNode *node;
GTypeClass *class = g_class;
g_return_if_fail (g_class != NULL);
node = LOOKUP_TYPE_NODE (class->g_type);
if (node && node->is_classed && node->data &&
node->data->class.class == class && node->data->common.ref_count > 0)
type_data_unref (node, TRUE);
else
g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
type_descriptive_name (class->g_type));
}
gpointer
g_type_class_peek (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
return node->data->class.class;
else
return NULL;
}
gpointer
g_type_class_peek_parent (gpointer g_class)
{
TypeNode *node;
g_return_val_if_fail (g_class != NULL, NULL);
node = LOOKUP_TYPE_NODE (G_TYPE_FROM_CLASS (g_class));
if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
{
node = LOOKUP_TYPE_NODE (NODE_PARENT_TYPE (node));
return node->data->class.class;
}
return NULL;
}
gpointer
g_type_interface_peek (gpointer instance_class,
GType iface_type)
{
TypeNode *node;
TypeNode *iface;
GTypeClass *class = instance_class;
g_return_val_if_fail (instance_class != NULL, NULL);
node = LOOKUP_TYPE_NODE (class->g_type);
iface = LOOKUP_TYPE_NODE (iface_type);
if (node && node->is_instantiatable && iface)
{
IFaceEntry *entry = type_lookup_iface_entry (node, iface);
if (entry && entry->vtable)
return entry->vtable;
}
return NULL;
}
GTypeValueTable*
g_type_value_table_peek (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node && node->data && node->data->common.ref_count > 0)
return node->data->common.value_table->value_init ? node->data->common.value_table : NULL;
else
return NULL;
}
gchar*
g_type_name (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
return node ? NODE_NAME (node) : NULL;
}
GQuark
g_type_qname (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
return node ? node->qname : 0;
}
GType
g_type_from_name (const gchar *name)
{
GQuark quark;
g_return_val_if_fail (name != NULL, 0);
quark = g_quark_try_string (name);
if (quark)
{
GType type = GPOINTER_TO_UINT (g_hash_table_lookup (g_type_nodes_ht, GUINT_TO_POINTER (quark)));
if (type)
return type;
}
return 0;
}
GType
g_type_parent (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
return node ? NODE_PARENT_TYPE (node) : 0;
}
GType
g_type_next_base (GType type,
GType base_type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node)
{
TypeNode *base_node = LOOKUP_TYPE_NODE (base_type);
if (base_node && base_node->n_supers < node->n_supers)
{
guint n = node->n_supers - base_node->n_supers;
if (node->supers[n] == base_type)
return node->supers[n - 1];
}
}
return 0;
}
gboolean
g_type_is_a (GType type,
GType is_a_type)
{
if (type != is_a_type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node)
{
TypeNode *a_node = LOOKUP_TYPE_NODE (is_a_type);
if (a_node && a_node->n_supers <= node->n_supers)
return node->supers[node->n_supers - a_node->n_supers] == is_a_type;
}
}
else
return LOOKUP_TYPE_NODE (type) != NULL;
return FALSE;
}
gboolean
g_type_conforms_to (GType type,
GType iface_type)
{
if (type != iface_type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node)
{
TypeNode *iface_node = LOOKUP_TYPE_NODE (iface_type);
if (iface_node)
{
if (iface_node->is_iface && node->is_instantiatable)
return type_lookup_iface_entry (node, iface_node) != NULL;
else if (iface_node->n_supers <= node->n_supers)
return node->supers[node->n_supers - iface_node->n_supers] == iface_type;
}
}
}
else
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
return node && (node->is_iface || node->is_instantiatable);
}
return FALSE;
}
guint
g_type_fundamental_branch_last (GType type)
{
GType ftype = G_TYPE_FUNDAMENTAL (type);
return ftype < G_TYPE_FUNDAMENTAL_LAST ? g_branch_seqnos[ftype] : 0;
}
GType* /* free result */
g_type_children (GType type,
guint *n_children)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node)
{
GType *children = g_new (GType, node->n_children + 1);
memcpy (children, node->children, sizeof (GType) * node->n_children);
children[node->n_children] = 0;
if (n_children)
*n_children = node->n_children;
return children;
}
else
{
if (n_children)
*n_children = 0;
return NULL;
}
}
GType* /* free result */
g_type_interfaces (GType type,
guint *n_interfaces)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
if (node && node->is_instantiatable)
{
GType *ifaces = g_new (GType, node->n_ifaces + 1);
guint i;
for (i = 0; i < node->n_ifaces; i++)
ifaces[i] = node->private.iface_entries[i].iface_type;
ifaces[i] = 0;
if (n_interfaces)
*n_interfaces = node->n_ifaces;
return ifaces;
}
else
{
if (n_interfaces)
*n_interfaces = 0;
return NULL;
}
}
typedef struct _QData QData;
struct _GData
{
guint n_qdatas;
QData *qdatas;
};
struct _QData
{
GQuark quark;
gpointer data;
};
gpointer
g_type_get_qdata (GType type,
GQuark quark)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
GData *gdata;
g_return_val_if_fail (node != NULL, NULL);
gdata = node->static_gdata;
if (quark && gdata && gdata->n_qdatas)
{
QData *qdatas = gdata->qdatas - 1;
guint n_qdatas = gdata->n_qdatas;
do /* FIXME: should optimize qdata lookups for <= 4 */
{
guint i;
QData *check;
i = (n_qdatas + 1) / 2;
check = qdatas + i;
if (quark == check->quark)
return check->data;
else if (quark > check->quark)
{
n_qdatas -= i;
qdatas = check;
}
else /* if (quark < check->quark) */
n_qdatas = i - 1;
}
while (n_qdatas);
}
return NULL;
}
void
g_type_set_qdata (GType type,
GQuark quark,
gpointer data)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
GData *gdata;
QData *qdata;
guint i;
g_return_if_fail (node != NULL);
g_return_if_fail (quark != 0);
/* setup qdata list if necessary */
if (!node->static_gdata)
node->static_gdata = g_new0 (GData, 1);
gdata = node->static_gdata;
/* try resetting old data */
qdata = gdata->qdatas;
for (i = 0; i < gdata->n_qdatas; i++)
if (qdata[i].quark == quark)
{
qdata[i].data = data;
return;
}
/* add new entry */
gdata->n_qdatas++;
gdata->qdatas = g_renew (QData, gdata->qdatas, gdata->n_qdatas);
qdata = gdata->qdatas;
for (i = 0; i < gdata->n_qdatas - 1; i++)
if (qdata[i].quark > quark)
break;
g_memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
qdata[i].quark = quark;
qdata[i].data = data;
}
/* --- implementation details --- */
gboolean
g_type_check_flags (GType type,
GTypeFlags flags)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
flags &= G_TYPE_FLAG_MASK;
if (node)
{
GTypeFundamentalInfo *finfo = type_node_fundamental_info (node);
return (finfo->type_flags & flags) != 0;
}
return FALSE;
}
GTypePlugin*
g_type_get_plugin (GType type)
{
TypeNode *node = LOOKUP_TYPE_NODE (type);
return node ? node->plugin : NULL;
}
gboolean
g_type_instance_conforms_to (GTypeInstance *type_instance,
GType iface_type)
{
return (type_instance && type_instance->g_class &&
g_type_conforms_to (type_instance->g_class->g_type, iface_type));
}
gboolean
g_type_class_is_a (GTypeClass *type_class,
GType is_a_type)
{
return (type_class && g_type_is_a (type_class->g_type, is_a_type));
}
GTypeInstance*
g_type_check_instance_cast (GTypeInstance *type_instance,
GType iface_type)
{
if (!type_instance)
{
g_warning ("invalid cast from (NULL) pointer to `%s'",
type_descriptive_name (iface_type));
return type_instance;
}
if (!type_instance->g_class)
{
g_warning ("invalid unclassed pointer in cast to `%s'",
type_descriptive_name (iface_type));
return type_instance;
}
if (!G_TYPE_IS_CLASSED (type_instance->g_class->g_type))
{
g_warning ("invalid unclassed type `%s' in cast to `%s'",
type_descriptive_name (type_instance->g_class->g_type),
type_descriptive_name (iface_type));
return type_instance;
}
if (!g_type_conforms_to (type_instance->g_class->g_type, iface_type))
{
g_warning ("invalid cast from `%s' to `%s'",
type_descriptive_name (type_instance->g_class->g_type),
type_descriptive_name (iface_type));
return type_instance;
}
return type_instance;
}
GTypeClass*
g_type_check_class_cast (GTypeClass *type_class,
GType is_a_type)
{
if (!type_class)
{
g_warning ("invalid class cast from (NULL) pointer to `%s'",
type_descriptive_name (is_a_type));
return type_class;
}
if (!G_TYPE_IS_CLASSED (type_class->g_type))
{
g_warning ("invalid unclassed type `%s' in class cast to `%s'",
type_descriptive_name (type_class->g_type),
type_descriptive_name (is_a_type));
return type_class;
}
if (!g_type_is_a (type_class->g_type, is_a_type))
{
g_warning ("invalid class cast from `%s' to `%s'",
type_descriptive_name (type_class->g_type),
type_descriptive_name (is_a_type));
return type_class;
}
return type_class;
}
/* --- foreign prototypes --- */
extern void g_value_types_init (void); /* sync with gvaluetypes.c */
extern void g_enum_types_init (void); /* sync with genums.c */
extern void g_param_type_init (void); /* sync with gparam.c */
extern void g_object_type_init (void); /* sync with gobject.c */
extern void g_param_spec_types_init (void); /* sync with gparamspecs.c */
/* --- initialization --- */
void
g_type_init (void)
{
static TypeNode *type0_node = NULL;
GTypeInfo info;
TypeNode *node;
GType type;
if (G_TYPE_FUNDAMENTAL_LAST)
return;
/* type qname hash table */
g_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
/* invalid type G_TYPE_INVALID (0)
*/
_g_type_fundamental_last = 1;
g_type_nodes = g_renew (TypeNode**, g_type_nodes, G_TYPE_FUNDAMENTAL_LAST);
g_type_nodes[0] = &type0_node;
g_branch_seqnos = g_renew (GType, g_branch_seqnos, G_TYPE_FUNDAMENTAL_LAST);
g_branch_seqnos[0] = 1;
/* void type G_TYPE_NONE
*/
node = type_node_fundamental_new (G_TYPE_NONE, "void", 0);
type = NODE_TYPE (node);
g_assert (type == G_TYPE_NONE);
/* interface fundamental type G_TYPE_INTERFACE (!classed)
*/
memset (&info, 0, sizeof (info));
node = type_node_fundamental_new (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
type = NODE_TYPE (node);
type_data_make (node, &info, NULL); // FIXME
g_assert (type == G_TYPE_INTERFACE);
/* G_TYPE_* value types
*/
g_value_types_init ();
/* G_TYPE_ENUM & G_TYPE_FLAGS
*/
g_enum_types_init ();
/* G_TYPE_PARAM
*/
g_param_type_init ();
/* G_TYPE_OBJECT
*/
g_object_type_init ();
/* G_TYPE_PARAM_* pspec types
*/
g_param_spec_types_init ();
}
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