luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2024-11-14 05:16:18 +01:00
Code Issues Packages Projects Releases Wiki Activity
7bb2462a42
glib/gobject/gtype.c
Owen Taylor 75f7f9ed05 Wrap setting freed instance memory to 0xaa in #ifdef G_ENABLE_DEBUG 
Mon Mar 25 17:25:57 2002  Owen Taylor  <otaylor@redhat.com>

        * gtype.c (g_type_free_instance): Wrap setting freed instance
        memory to 0xaa in #ifdef G_ENABLE_DEBUG
2002-03-25 22:26:53 +00:00

2986 lines
84 KiB
C
Raw Blame History

/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998-1999, 2000-2001 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"
/*
* MT safe
*/
#include "gtypeplugin.h"
#include "gvaluecollector.h"
#include <string.h>
/* 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
* CLASSED_NODE_IFACES_ENTRIES() respectively IFACE_NODE_PREREQUISITES() (but
* not ->supers[]), 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.
*
* LOCKING:
* lock handling issues when calling static functions are indicated by
* uppercase letter postfixes, all static functions have to have
* one of the below postfixes:
* - _I: [Indifferent about locking]
* function doesn't care about locks at all
* - _U: [Unlocked invocation]
* no read or write lock has to be held across function invocation
* (locks may be acquired and released during invocation though)
* - _L: [Locked invocation]
* a write lock or more than 0 read locks have to be held across
* function invocation
* - _W: [Write-locked invocation]
* a write lock has to be held across function invokation
* - _Wm: [Write-locked invocation, mutatable]
* like _W, but the write lock might be released and reacquired
* during invocation, watch your pointers
*/
static GStaticRWLock type_rw_lock = G_STATIC_RW_LOCK_INIT;
#ifdef LOCK_DEBUG
#define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_static_rw_lock_reader_lock (rw_lock); } while (0)
#define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_static_rw_lock_reader_unlock (rw_lock); } while (0)
#define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_static_rw_lock_writer_lock (rw_lock); } while (0)
#define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_static_rw_lock_writer_unlock (rw_lock); } while (0)
#else
#define G_READ_LOCK(rw_lock) g_static_rw_lock_reader_lock (rw_lock)
#define G_READ_UNLOCK(rw_lock) g_static_rw_lock_reader_unlock (rw_lock)
#define G_WRITE_LOCK(rw_lock) g_static_rw_lock_writer_lock (rw_lock)
#define G_WRITE_UNLOCK(rw_lock) g_static_rw_lock_writer_unlock (rw_lock)
#endif
#define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
static const gchar *_action = " invalidly modified type "; \
gpointer _arg = (gpointer) (arg); const gchar *_tname = (type_name), *_fname = (func); \
if (_arg) \
g_error ("%s(%p)%s`%s'", _fname, _arg, _action, _tname); \
else \
g_error ("%s()%s`%s'", _fname, _action, _tname); \
}G_STMT_END
#define g_return_val_if_uninitialized(condition, init_function, return_value) G_STMT_START{ \
if (!(condition)) \
{ \
g_log (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, \
"%s: initialization assertion failed, use %s() prior to this function", \
G_STRLOC, G_STRINGIFY (init_function)); \
return (return_value); \
} \
}G_STMT_END
#ifdef G_ENABLE_DEBUG
#define DEBUG_CODE(debug_type, code_block) G_STMT_START { \
if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type) \
{ code_block; } \
} G_STMT_END
#else /* !G_ENABLE_DEBUG */
#define DEBUG_CODE(debug_type, code_block) /* code_block */
#endif /* G_ENABLE_DEBUG */
#define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
G_TYPE_FLAG_INSTANTIATABLE | \
G_TYPE_FLAG_DERIVABLE | \
G_TYPE_FLAG_DEEP_DERIVABLE)
#define TYPE_FLAG_MASK (G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT)
#define SIZEOF_FUNDAMENTAL_INFO ((gssize) MAX (MAX (sizeof (GTypeFundamentalInfo), \
sizeof (gpointer)), \
sizeof (glong)))
/* --- typedefs --- */
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_I (TypeNode *node);
static void type_add_flags_W (TypeNode *node,
GTypeFlags flags);
static void type_data_make_W (TypeNode *node,
const GTypeInfo *info,
const GTypeValueTable *value_table);
static inline void type_data_ref_Wm (TypeNode *node);
static inline void type_data_unref_Wm (TypeNode *node,
gboolean uncached);
static void type_data_last_unref_Wm (GType type,
gboolean uncached);
static inline gpointer type_get_qdata_L (TypeNode *node,
GQuark quark);
static inline void type_set_qdata_W (TypeNode *node,
GQuark quark,
gpointer data);
static IFaceHolder* type_iface_peek_holder_L (TypeNode *iface,
GType instance_type);
static gboolean type_node_is_a_L (TypeNode *node,
TypeNode *iface_node);
/* --- structures --- */
struct _TypeNode
{
GTypePlugin *plugin;
guint n_children : 12;
guint n_supers : 8;
guint _prot_n_ifaces_prerequisites : 9;
guint is_classed : 1;
guint is_instantiatable : 1;
guint mutatable_check_cache : 1; /* combines some common path checks */
GType *children;
TypeData * volatile data;
GQuark qname;
GData *global_gdata;
union {
IFaceEntry *iface_entries; /* for !iface types */
GType *prerequisistes;
} _prot;
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)
#define MAX_N_PREREQUISITES (MAX_N_IFACES)
#define NODE_TYPE(node) (node->supers[0])
#define NODE_PARENT_TYPE(node) (node->supers[1])
#define NODE_FUNDAMENTAL_TYPE(node) (node->supers[node->n_supers])
#define NODE_NAME(node) (g_quark_to_string (node->qname))
#define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
#define CLASSED_NODE_N_IFACES(node) ((node)->_prot_n_ifaces_prerequisites)
#define CLASSED_NODE_IFACES_ENTRIES(node) ((node)->_prot.iface_entries)
#define IFACE_NODE_N_PREREQUISITES(node) ((node)->_prot_n_ifaces_prerequisites)
#define IFACE_NODE_PREREQUISITES(node) ((node)->_prot.prerequisistes)
#define iface_node_get_holders_L(node) ((IFaceHolder*) type_get_qdata_L ((node), static_quark_iface_holder))
#define iface_node_set_holders_W(node, holders) (type_set_qdata_W ((node), static_quark_iface_holder, (holders)))
#define iface_node_get_dependants_array_L(n) ((GType*) type_get_qdata_L ((n), static_quark_dependants_array))
#define iface_node_set_dependants_array_W(n,d) (type_set_qdata_W ((n), static_quark_dependants_array, (d)))
#define TYPE_ID_MASK ((GType) ((1 << G_TYPE_FUNDAMENTAL_SHIFT) - 1))
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 static_n_class_cache_funcs = 0;
static ClassCacheFunc *static_class_cache_funcs = NULL;
static GQuark static_quark_type_flags = 0;
static GQuark static_quark_iface_holder = 0;
static GQuark static_quark_dependants_array = 0;
GTypeDebugFlags _g_type_debug_flags = 0;
/* --- type nodes --- */
static GHashTable *static_type_nodes_ht = NULL;
static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { 0, };
static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
static inline TypeNode*
lookup_type_node_I (register GType utype)
{
if (utype > G_TYPE_FUNDAMENTAL_MAX)
return (TypeNode*) (utype & ~TYPE_ID_MASK);
else
return static_fundamental_type_nodes[utype >> G_TYPE_FUNDAMENTAL_SHIFT];
}
static TypeNode*
type_node_any_new_W (TypeNode *pnode,
GType ftype,
const gchar *name,
GTypePlugin *plugin,
GTypeFundamentalFlags type_flags)
{
guint n_supers;
GType type;
TypeNode *node;
guint i, node_size = 0;
n_supers = pnode ? pnode->n_supers + 1 : 0;
if (!pnode)
node_size += SIZEOF_FUNDAMENTAL_INFO; /* 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) /* offset fundamental types */
{
node = G_STRUCT_MEMBER_P (node, SIZEOF_FUNDAMENTAL_INFO);
static_fundamental_type_nodes[ftype >> G_TYPE_FUNDAMENTAL_SHIFT] = node;
type = ftype;
}
else
type = (GType) node;
g_assert ((type & TYPE_ID_MASK) == 0);
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;
if (NODE_IS_IFACE (node))
{
IFACE_NODE_N_PREREQUISITES (node) = 0;
IFACE_NODE_PREREQUISITES (node) = NULL;
}
else
{
CLASSED_NODE_N_IFACES (node) = 0;
CLASSED_NODE_IFACES_ENTRIES (node) = 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;
if (NODE_IS_IFACE (node))
{
IFACE_NODE_N_PREREQUISITES (node) = 0;
IFACE_NODE_PREREQUISITES (node) = NULL;
}
else
{
guint j;
CLASSED_NODE_N_IFACES (node) = CLASSED_NODE_N_IFACES (pnode);
CLASSED_NODE_IFACES_ENTRIES (node) = g_memdup (CLASSED_NODE_IFACES_ENTRIES (pnode),
sizeof (CLASSED_NODE_IFACES_ENTRIES (pnode)[0]) *
CLASSED_NODE_N_IFACES (node));
for (j = 0; j < CLASSED_NODE_N_IFACES (node); j++)
CLASSED_NODE_IFACES_ENTRIES (node)[j].vtable = NULL;
}
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->global_gdata = NULL;
g_hash_table_insert (static_type_nodes_ht,
GUINT_TO_POINTER (node->qname),
(gpointer) type);
return node;
}
static inline GTypeFundamentalInfo*
type_node_fundamental_info_I (TypeNode *node)
{
GType ftype = NODE_FUNDAMENTAL_TYPE (node);
if (ftype != NODE_TYPE (node))
node = lookup_type_node_I (ftype);
return node ? G_STRUCT_MEMBER_P (node, -SIZEOF_FUNDAMENTAL_INFO) : NULL;
}
static TypeNode*
type_node_fundamental_new_W (GType ftype,
const gchar *name,
GTypeFundamentalFlags type_flags)
{
GTypeFundamentalInfo *finfo;
TypeNode *node;
g_assert ((ftype & TYPE_ID_MASK) == 0);
g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX);
if (ftype == static_fundamental_next)
static_fundamental_next += 1 << G_TYPE_FUNDAMENTAL_SHIFT;
type_flags &= TYPE_FUNDAMENTAL_FLAG_MASK;
node = type_node_any_new_W (NULL, ftype, name, NULL, type_flags);
finfo = type_node_fundamental_info_I (node);
finfo->type_flags = type_flags;
return node;
}
static TypeNode*
type_node_new_W (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_W (pnode, NODE_FUNDAMENTAL_TYPE (pnode), name, plugin, 0);
}
static inline IFaceEntry*
type_lookup_iface_entry_L (TypeNode *node,
TypeNode *iface_node)
{
if (NODE_IS_IFACE (iface_node) && CLASSED_NODE_N_IFACES (node))
{
IFaceEntry *ifaces = CLASSED_NODE_IFACES_ENTRIES (node) - 1;
guint n_ifaces = CLASSED_NODE_N_IFACES (node);
GType iface_type = NODE_TYPE (iface_node);
do
{
guint i;
IFaceEntry *check;
i = (n_ifaces + 1) >> 1;
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 gboolean
type_lookup_prerequisite_L (TypeNode *iface,
GType prerequisite_type)
{
if (NODE_IS_IFACE (iface) && IFACE_NODE_N_PREREQUISITES (iface))
{
GType *prerequisites = IFACE_NODE_PREREQUISITES (iface) - 1;
guint n_prerequisites = IFACE_NODE_N_PREREQUISITES (iface);
do
{
guint i;
GType *check;
i = (n_prerequisites + 1) >> 1;
check = prerequisites + i;
if (prerequisite_type == *check)
return TRUE;
else if (prerequisite_type > *check)
{
n_prerequisites -= i;
prerequisites = check;
}
else /* if (prerequisite_type < *check) */
n_prerequisites = i - 1;
}
while (n_prerequisites);
}
return FALSE;
}
static inline gchar*
type_descriptive_name_I (GType type)
{
if (type)
{
TypeNode *node = lookup_type_node_I (type);
return node ? NODE_NAME (node) : "<unknown>";
}
else
return "<invalid>";
}
/* --- type consistency checks --- */
static gboolean
check_plugin_U (GTypePlugin *plugin,
gboolean need_complete_type_info,
gboolean need_complete_interface_info,
const gchar *type_name)
{
/* G_IS_TYPE_PLUGIN() and G_TYPE_PLUGIN_GET_CLASS() are external calls: _U
*/
if (!plugin)
{
g_warning ("plugin handle for type `%s' is NULL",
type_name);
return FALSE;
}
if (!G_IS_TYPE_PLUGIN (plugin))
{
g_warning ("plugin pointer (%p) for type `%s' is invalid",
plugin, type_name);
return FALSE;
}
if (need_complete_type_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->complete_type_info)
{
g_warning ("plugin for type `%s' has no complete_type_info() implementation",
type_name);
return FALSE;
}
if (need_complete_interface_info && !G_TYPE_PLUGIN_GET_CLASS (plugin)->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_I (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_I (GType parent_type,
const gchar *type_name)
{
TypeNode *pnode;
GTypeFundamentalInfo* finfo;
pnode = lookup_type_node_I (parent_type);
if (!pnode)
{
g_warning ("cannot derive type `%s' from invalid parent type `%s'",
type_name,
type_descriptive_name_I (parent_type));
return FALSE;
}
finfo = type_node_fundamental_info_I (pnode);
/* 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 != NODE_FUNDAMENTAL_TYPE (pnode) &&
!(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_collect_format_I (const gchar *collect_format)
{
const gchar *p = collect_format;
gchar valid_format[] = { G_VALUE_COLLECT_INT, G_VALUE_COLLECT_LONG,
G_VALUE_COLLECT_INT64, G_VALUE_COLLECT_DOUBLE,
G_VALUE_COLLECT_POINTER, 0 };
while (*p)
if (!strchr (valid_format, *p++))
return FALSE;
return p - collect_format <= G_VALUE_COLLECT_FORMAT_MAX_LENGTH;
}
static gboolean
check_value_table_I (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->value_peek_pointer ||
value_table->collect_format || value_table->collect_value ||
value_table->lcopy_format || 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_format || value_table->collect_value) &&
(!value_table->collect_format || !value_table->collect_value))
{
g_warning ("one of `collect_format' and `collect_value()' is unspecified for type `%s'",
type_name);
return FALSE;
}
if (value_table->collect_format && !check_collect_format_I (value_table->collect_format))
{
g_warning ("the `%s' specification for type `%s' is too long or invalid",
"collect_format",
type_name);
return FALSE;
}
if ((value_table->lcopy_format || value_table->lcopy_value) &&
(!value_table->lcopy_format || !value_table->lcopy_value))
{
g_warning ("one of `lcopy_format' and `lcopy_value()' is unspecified for type `%s'",
type_name);
return FALSE;
}
if (value_table->lcopy_format && !check_collect_format_I (value_table->lcopy_format))
{
g_warning ("the `%s' specification for type `%s' is too long or invalid",
"lcopy_format",
type_name);
return FALSE;
}
}
return TRUE;
}
static gboolean
check_type_info_I (TypeNode *pnode,
GType ftype,
const gchar *type_name,
const GTypeInfo *info)
{
GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (lookup_type_node_I (ftype));
gboolean is_interface = ftype == G_TYPE_INTERFACE;
g_assert (ftype <= G_TYPE_FUNDAMENTAL_MAX && !(ftype & TYPE_ID_MASK));
/* 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_child_type_L (TypeNode *pnode,
TypeNode *iface)
{
TypeNode *node = NULL;
guint i;
if (type_lookup_iface_entry_L (pnode, iface))
return pnode;
for (i = 0; i < pnode->n_children && !node; i++)
node = find_conforming_child_type_L (lookup_type_node_I (pnode->children[i]), iface);
return node;
}
static gboolean
check_add_interface_L (GType instance_type,
GType iface_type)
{
TypeNode *node = lookup_type_node_I (instance_type);
TypeNode *iface = lookup_type_node_I (iface_type);
IFaceEntry *entry;
TypeNode *tnode;
GType *prerequisites;
guint i;
if (!node || !node->is_instantiatable)
{
g_warning ("cannot add interfaces to invalid (non-instantiatable) type `%s'",
type_descriptive_name_I (instance_type));
return FALSE;
}
if (!iface || !NODE_IS_IFACE (iface))
{
g_warning ("cannot add invalid (non-interface) type `%s' to type `%s'",
type_descriptive_name_I (iface_type),
NODE_NAME (node));
return FALSE;
}
tnode = lookup_type_node_I (NODE_PARENT_TYPE (iface));
if (NODE_PARENT_TYPE (tnode) && !type_lookup_iface_entry_L (node, tnode))
{
/* 2001/7/31:timj: erk, i guess this warning is junk as interface derivation is flat */
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;
}
/* allow overriding of interface type introduced for parent type */
entry = type_lookup_iface_entry_L (node, iface);
if (entry && entry->vtable == NULL && !type_iface_peek_holder_L (iface, NODE_TYPE (node)))
{
/* ok, we do conform to this interface already, but the interface vtable was not
* yet intialized, and we just conform to the interface because it got added to
* one of our parents. so we allow overriding of holder info here.
*/
return TRUE;
}
/* check whether one of our children already conforms (or whether the interface
* got added to this node already)
*/
tnode = find_conforming_child_type_L (node, iface); /* tnode is_a node */
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;
}
prerequisites = IFACE_NODE_PREREQUISITES (iface);
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
{
tnode = lookup_type_node_I (prerequisites[i]);
if (!type_node_is_a_L (node, tnode))
{
g_warning ("cannot add interface type `%s' to type `%s' which does not conform to prerequisite `%s'",
NODE_NAME (iface),
NODE_NAME (node),
NODE_NAME (tnode));
return FALSE;
}
}
return TRUE;
}
static gboolean
check_interface_info_I (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_I (instance_type));
return FALSE;
}
return TRUE;
}
/* --- type info (type node data) --- */
static void
type_data_make_W (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_I (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)
{
/* need to setup vtable_size since we have to allocate it with data in one chunk */
vtable_size = sizeof (GTypeValueTable);
if (value_table->collect_format)
vtable_size += strlen (value_table->collect_format);
if (value_table->lcopy_format)
vtable_size += strlen (value_table->lcopy_format);
vtable_size += 2;
}
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;
#ifdef DISABLE_MEM_POOLS
data->instance.n_preallocs = 0;
#else /* !DISABLE_MEM_POOLS */
data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
#endif /* !DISABLE_MEM_POOLS */
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 (node))
{
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)
{
gchar *p;
/* we allocate the vtable and its strings together with the type data, so
* children can take over their parent's vtable pointer, and we don't
* need to worry freeing it or not when the child data is destroyed
*/
*vtable = *value_table;
p = G_STRUCT_MEMBER_P (vtable, sizeof (*vtable));
p[0] = 0;
vtable->collect_format = p;
if (value_table->collect_format)
{
strcat (p, value_table->collect_format);
p += strlen (value_table->collect_format);
}
p++;
p[0] = 0;
vtable->lcopy_format = p;
if (value_table->lcopy_format)
strcat (p, value_table->lcopy_format);
}
node->data->common.value_table = vtable;
node->mutatable_check_cache = (node->data->common.value_table->value_init != NULL &&
!((G_TYPE_FLAG_VALUE_ABSTRACT | G_TYPE_FLAG_ABSTRACT) &
GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))));
g_assert (node->data->common.value_table != NULL); /* paranoid */
}
static inline void
type_data_ref_Wm (TypeNode *node)
{
if (!node->data)
{
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
GTypeInfo tmp_info;
GTypeValueTable tmp_value_table;
g_assert (node->plugin != NULL);
if (pnode)
{
type_data_ref_Wm (pnode);
if (node->data)
INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
}
memset (&tmp_info, 0, sizeof (tmp_info));
memset (&tmp_value_table, 0, sizeof (tmp_value_table));
G_WRITE_UNLOCK (&type_rw_lock);
g_type_plugin_use (node->plugin);
g_type_plugin_complete_type_info (node->plugin, NODE_TYPE (node), &tmp_info, &tmp_value_table);
G_WRITE_LOCK (&type_rw_lock);
if (node->data)
INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (node), NODE_NAME (node), &tmp_info);
type_data_make_W (node, &tmp_info,
check_value_table_I (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_Wm (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_Wm (NODE_TYPE (node), uncached);
}
}
static void
type_node_add_iface_entry_W (TypeNode *node,
GType iface_type)
{
IFaceEntry *entries;
guint i;
g_assert (node->is_instantiatable && CLASSED_NODE_N_IFACES (node) < MAX_N_IFACES);
entries = CLASSED_NODE_IFACES_ENTRIES (node);
for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
if (entries[i].iface_type == iface_type)
{
/* this can (should) only happen if our parent type already conformed
* to iface_type and node got it's own holder info. here, our
* children should already have entries with NULL vtables, so
* we're actually done.
*/
g_assert (entries[i].vtable == NULL);
return;
}
else if (entries[i].iface_type > iface_type)
break;
CLASSED_NODE_N_IFACES (node) += 1;
CLASSED_NODE_IFACES_ENTRIES (node) = g_renew (IFaceEntry,
CLASSED_NODE_IFACES_ENTRIES (node),
CLASSED_NODE_N_IFACES (node));
entries = CLASSED_NODE_IFACES_ENTRIES (node);
g_memmove (entries + i + 1, entries + i, sizeof (entries[0]) * (CLASSED_NODE_N_IFACES (node) - 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_W (lookup_type_node_I (node->children[i]), iface_type);
}
static void
type_add_interface_W (TypeNode *node,
TypeNode *iface,
const 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 && NODE_IS_IFACE (iface) && ((info && !plugin) || (!info && plugin)));
iholder->next = iface_node_get_holders_L (iface);
iface_node_set_holders_W (iface, iholder);
iholder->instance_type = NODE_TYPE (node);
iholder->info = info ? g_memdup (info, sizeof (*info)) : NULL;
iholder->plugin = plugin;
type_node_add_iface_entry_W (node, NODE_TYPE (iface));
}
static void
type_iface_add_prerequisite_W (TypeNode *iface,
TypeNode *prerequisite_node)
{
GType prerequisite_type = NODE_TYPE (prerequisite_node);
GType *prerequisites, *dependants;
guint n_dependants, i;
g_assert (NODE_IS_IFACE (iface) &&
IFACE_NODE_N_PREREQUISITES (iface) < MAX_N_PREREQUISITES &&
(prerequisite_node->is_instantiatable || NODE_IS_IFACE (prerequisite_node)));
prerequisites = IFACE_NODE_PREREQUISITES (iface);
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
if (prerequisites[i] == prerequisite_type)
return; /* we already have that prerequisiste */
else if (prerequisites[i] > prerequisite_type)
break;
IFACE_NODE_N_PREREQUISITES (iface) += 1;
IFACE_NODE_PREREQUISITES (iface) = g_renew (GType,
IFACE_NODE_PREREQUISITES (iface),
IFACE_NODE_N_PREREQUISITES (iface));
prerequisites = IFACE_NODE_PREREQUISITES (iface);
g_memmove (prerequisites + i + 1, prerequisites + i,
sizeof (prerequisites[0]) * (IFACE_NODE_N_PREREQUISITES (iface) - i - 1));
prerequisites[i] = prerequisite_type;
/* we want to get notified when prerequisites get added to prerequisite_node */
if (NODE_IS_IFACE (prerequisite_node))
{
dependants = iface_node_get_dependants_array_L (prerequisite_node);
n_dependants = dependants ? dependants[0] : 0;
n_dependants += 1;
dependants = g_renew (GType, dependants, n_dependants + 1);
dependants[n_dependants] = NODE_TYPE (iface);
dependants[0] = n_dependants;
iface_node_set_dependants_array_W (prerequisite_node, dependants);
}
/* we need to notify all dependants */
dependants = iface_node_get_dependants_array_L (iface);
n_dependants = dependants ? dependants[0] : 0;
for (i = 1; i <= n_dependants; i++)
type_iface_add_prerequisite_W (lookup_type_node_I (dependants[i]), prerequisite_node);
}
void
g_type_interface_add_prerequisite (GType interface_type,
GType prerequisite_type)
{
TypeNode *iface, *prerequisite_node;
IFaceHolder *holders;
g_return_if_fail (G_TYPE_IS_INTERFACE (interface_type)); /* G_TYPE_IS_INTERFACE() is an external call: _U */
g_return_if_fail (!g_type_is_a (interface_type, prerequisite_type));
g_return_if_fail (!g_type_is_a (prerequisite_type, interface_type));
iface = lookup_type_node_I (interface_type);
prerequisite_node = lookup_type_node_I (prerequisite_type);
if (!iface || !prerequisite_node || !NODE_IS_IFACE (iface))
{
g_warning ("interface type `%s' or prerequisite type `%s' invalid",
type_descriptive_name_I (interface_type),
type_descriptive_name_I (prerequisite_type));
return;
}
G_WRITE_LOCK (&type_rw_lock);
holders = iface_node_get_holders_L (iface);
if (holders)
{
G_WRITE_UNLOCK (&type_rw_lock);
g_warning ("unable to add prerequisite `%s' to interface `%s' which is already in use for `%s'",
type_descriptive_name_I (prerequisite_type),
type_descriptive_name_I (interface_type),
type_descriptive_name_I (holders->instance_type));
return;
}
if (prerequisite_node->is_instantiatable)
{
guint i;
/* can have at most one publically installable instantiatable prerequisite */
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
{
TypeNode *prnode = lookup_type_node_I (IFACE_NODE_PREREQUISITES (iface)[i]);
if (prnode->is_instantiatable)
{
G_WRITE_UNLOCK (&type_rw_lock);
g_warning ("adding prerequisite `%s' to interface `%s' conflicts with existing prerequisite `%s'",
type_descriptive_name_I (prerequisite_type),
type_descriptive_name_I (interface_type),
type_descriptive_name_I (NODE_TYPE (prnode)));
return;
}
}
for (i = 0; i < prerequisite_node->n_supers + 1; i++)
type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisite_node->supers[i]));
G_WRITE_UNLOCK (&type_rw_lock);
}
else if (NODE_IS_IFACE (prerequisite_node))
{
GType *dependants;
guint n_dependants, i;
dependants = iface_node_get_dependants_array_L (prerequisite_node);
n_dependants = dependants ? dependants[0] : 0;
for (i = 1; i <= n_dependants; i++)
type_iface_add_prerequisite_W (iface, lookup_type_node_I (dependants[i]));
type_iface_add_prerequisite_W (iface, prerequisite_node);
G_WRITE_UNLOCK (&type_rw_lock);
}
else
{
G_WRITE_UNLOCK (&type_rw_lock);
g_warning ("prerequisite `%s' for interface `%s' is neither instantiatable nor interface",
type_descriptive_name_I (prerequisite_type),
type_descriptive_name_I (interface_type));
}
}
static IFaceHolder*
type_iface_peek_holder_L (TypeNode *iface,
GType instance_type)
{
IFaceHolder *iholder;
g_assert (NODE_IS_IFACE (iface));
iholder = iface_node_get_holders_L (iface);
while (iholder && iholder->instance_type != instance_type)
iholder = iholder->next;
return iholder;
}
static IFaceHolder*
type_iface_retrieve_holder_info_Wm (TypeNode *iface,
GType instance_type,
gboolean need_info)
{
IFaceHolder *iholder = type_iface_peek_holder_L (iface, instance_type);
if (iholder && !iholder->info && need_info)
{
GInterfaceInfo tmp_info;
g_assert (iholder->plugin != NULL);
type_data_ref_Wm (iface);
if (iholder->info)
INVALID_RECURSION ("g_type_plugin_*", iface->plugin, NODE_NAME (iface));
memset (&tmp_info, 0, sizeof (tmp_info));
G_WRITE_UNLOCK (&type_rw_lock);
g_type_plugin_use (iholder->plugin);
g_type_plugin_complete_interface_info (iholder->plugin, instance_type, NODE_TYPE (iface), &tmp_info);
G_WRITE_LOCK (&type_rw_lock);
if (iholder->info)
INVALID_RECURSION ("g_type_plugin_*", iholder->plugin, NODE_NAME (iface));
check_interface_info_I (iface, instance_type, &tmp_info);
iholder->info = g_memdup (&tmp_info, sizeof (tmp_info));
}
return iholder; /* we don't modify write lock upon returning NULL */
}
static void
type_iface_blow_holder_info_Wm (TypeNode *iface,
GType instance_type)
{
IFaceHolder *iholder = iface_node_get_holders_L (iface);
g_assert (NODE_IS_IFACE (iface));
while (iholder->instance_type != instance_type)
iholder = iholder->next;
if (iholder->info && iholder->plugin)
{
g_free (iholder->info);
iholder->info = NULL;
G_WRITE_UNLOCK (&type_rw_lock);
g_type_plugin_unuse (iholder->plugin);
G_WRITE_LOCK (&type_rw_lock);
type_data_unref_Wm (iface, FALSE);
}
}
/* --- type structure creation/destruction --- */
GTypeInstance*
g_type_create_instance (GType type)
{
TypeNode *node;
GTypeInstance *instance;
GTypeClass *class;
guint i;
node = lookup_type_node_I (type);
if (!node || !node->is_instantiatable)
{
g_warning ("cannot create new instance of invalid (non-instantiatable) type `%s'",
type_descriptive_name_I (type));
return NULL;
}
/* G_TYPE_IS_ABSTRACT() is an external call: _U */
if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
{
g_warning ("cannot create instance of abstract (non-instantiatable) type `%s'",
type_descriptive_name_I (type));
return NULL;
}
class = g_type_class_ref (type);
if (node->data->instance.n_preallocs)
{
G_WRITE_LOCK (&type_rw_lock);
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);
G_WRITE_UNLOCK (&type_rw_lock);
}
else
instance = g_malloc0 (node->data->instance.instance_size); /* fine without read lock */
for (i = node->n_supers; i > 0; i--)
{
TypeNode *pnode;
pnode = lookup_type_node_I (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_I (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_I (class->g_type));
return;
}
/* G_TYPE_IS_ABSTRACT() is an external call: _U */
if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (NODE_TYPE (node)))
{
g_warning ("cannot free instance of abstract (non-instantiatable) type `%s'",
NODE_NAME (node));
return;
}
instance->g_class = NULL;
#ifdef G_ENABLE_DEBUG
memset (instance, 0xaa, node->data->instance.instance_size); /* debugging hack */
#endif
if (node->data->instance.n_preallocs)
{
G_WRITE_LOCK (&type_rw_lock);
g_chunk_free (instance, node->data->instance.mem_chunk);
G_WRITE_UNLOCK (&type_rw_lock);
}
else
g_free (instance);
g_type_class_unref (class);
}
static gboolean
type_iface_vtable_init_Wm (TypeNode *iface,
TypeNode *node)
{
IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
IFaceHolder *iholder;
GTypeInterface *vtable = NULL;
TypeNode *pnode;
/* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), TRUE);
if (!iholder)
return FALSE; /* we don't modify write lock upon FALSE */
g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
if (pnode) /* want to copy over parent iface contents */
{
IFaceEntry *pentry = type_lookup_iface_entry_L (pnode, iface);
if (pentry)
vtable = g_memdup (pentry->vtable, iface->data->iface.vtable_size);
}
if (!vtable)
vtable = g_malloc0 (iface->data->iface.vtable_size);
entry->vtable = vtable;
vtable->g_type = NODE_TYPE (iface);
vtable->g_instance_type = NODE_TYPE (node);
if (iface->data->iface.vtable_init_base || iholder->info->interface_init)
{
G_WRITE_UNLOCK (&type_rw_lock);
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);
G_WRITE_LOCK (&type_rw_lock);
}
return TRUE; /* write lock modified */
}
static gboolean
type_iface_vtable_finalize_Wm (TypeNode *iface,
TypeNode *node,
GTypeInterface *vtable)
{
IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
IFaceHolder *iholder;
/* type_iface_retrieve_holder_info_Wm() doesn't modify write lock for returning NULL */
iholder = type_iface_retrieve_holder_info_Wm (iface, NODE_TYPE (node), FALSE);
if (!iholder)
return FALSE; /* we don't modify write lock upon FALSE */
g_assert (entry && entry->vtable == vtable && iholder->info);
entry->vtable = NULL;
if (iholder->info->interface_finalize || iface->data->iface.vtable_finalize_base)
{
G_WRITE_UNLOCK (&type_rw_lock);
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);
G_WRITE_LOCK (&type_rw_lock);
}
vtable->g_type = 0;
vtable->g_instance_type = 0;
g_free (vtable);
type_iface_blow_holder_info_Wm (iface, NODE_TYPE (node));
return TRUE; /* write lock modified */
}
static void
type_class_init_Wm (TypeNode *node,
GTypeClass *pclass)
{
GSList *slist, *init_slist = NULL;
GTypeClass *class;
IFaceEntry *entry;
TypeNode *bnode, *pnode;
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_I (pclass->g_type);
memcpy (class, pclass, pnode->data->class.class_size);
}
class->g_type = NODE_TYPE (node);
G_WRITE_UNLOCK (&type_rw_lock);
/* stack all base class initialization functions, so we
* call them in ascending order.
*/
for (bnode = node; bnode; bnode = lookup_type_node_I (NODE_PARENT_TYPE (bnode)))
if (bnode->data->class.class_init_base)
init_slist = g_slist_prepend (init_slist, (gpointer) bnode->data->class.class_init_base);
for (slist = init_slist; slist; slist = slist->next)
{
GBaseInitFunc class_init_base = (GBaseInitFunc) 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);
G_WRITE_LOCK (&type_rw_lock);
/* ok, we got the class done, now initialize all interfaces, either
* from parent, or through our holder info
*/
pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
entry = CLASSED_NODE_IFACES_ENTRIES (node) + 0;
while (entry)
{
g_assert (entry->vtable == NULL);
if (!type_iface_vtable_init_Wm (lookup_type_node_I (entry->iface_type), node))
{
guint j;
/* type_iface_vtable_init_Wm() doesn't modify write lock upon FALSE,
* need to get this interface from parent
*/
g_assert (pnode != NULL);
for (j = 0; j < CLASSED_NODE_N_IFACES (pnode); j++)
{
IFaceEntry *pentry = CLASSED_NODE_IFACES_ENTRIES (pnode) + j;
if (pentry->iface_type == entry->iface_type)
{
entry->vtable = pentry->vtable;
break;
}
}
g_assert (entry->vtable != NULL);
}
/* refetch entry, IFACES_ENTRIES might be modified */
for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
if (!CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable)
entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
}
}
static void
type_data_finalize_class_ifaces_Wm (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_I (NODE_FUNDAMENTAL_TYPE (node)),
type_descriptive_name_I (NODE_TYPE (node)));
for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
while (entry)
{
if (!type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
{
/* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
* iface vtable came from parent
*/
entry->vtable = NULL;
}
/* refetch entry, IFACES_ENTRIES might be modified */
for (entry = NULL, i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
if (CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable &&
CLASSED_NODE_IFACES_ENTRIES (node)[i].vtable->g_instance_type == NODE_TYPE (node))
entry = CLASSED_NODE_IFACES_ENTRIES (node) + i;
}
}
static void
type_data_finalize_class_U (TypeNode *node,
ClassData *cdata)
{
GTypeClass *class = cdata->class;
TypeNode *bnode;
g_assert (cdata->class && cdata->common.ref_count == 0);
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_I (NODE_PARENT_TYPE (node)); bnode; bnode = lookup_type_node_I (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_Wm (GType type,
gboolean uncached)
{
TypeNode *node = lookup_type_node_I (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_I (type));
return;
}
if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs)
{
guint i;
G_WRITE_UNLOCK (&type_rw_lock);
G_READ_LOCK (&type_rw_lock);
for (i = 0; i < static_n_class_cache_funcs; i++)
{
GTypeClassCacheFunc cache_func = static_class_cache_funcs[i].cache_func;
gpointer cache_data = static_class_cache_funcs[i].cache_data;
gboolean need_break;
G_READ_UNLOCK (&type_rw_lock);
need_break = cache_func (cache_data, node->data->class.class);
G_READ_LOCK (&type_rw_lock);
if (!node->data || node->data->common.ref_count == 0)
INVALID_RECURSION ("GType class cache function ", cache_func, NODE_NAME (node));
if (need_break)
break;
}
G_READ_UNLOCK (&type_rw_lock);
G_WRITE_LOCK (&type_rw_lock);
}
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 (CLASSED_NODE_N_IFACES (node))
type_data_finalize_class_ifaces_Wm (node);
node->mutatable_check_cache = FALSE;
node->data = NULL;
G_WRITE_UNLOCK (&type_rw_lock);
type_data_finalize_class_U (node, &tdata->class);
G_WRITE_LOCK (&type_rw_lock);
}
else
{
node->mutatable_check_cache = FALSE;
node->data = NULL;
}
/* freeing tdata->common.value_table and its contents is taking care of
* by allocating it in one chunk with tdata
*/
g_free (tdata);
if (ptype)
type_data_unref_Wm (lookup_type_node_I (ptype), FALSE);
G_WRITE_UNLOCK (&type_rw_lock);
g_type_plugin_unuse (node->plugin);
G_WRITE_LOCK (&type_rw_lock);
}
}
void
g_type_add_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func)
{
guint i;
g_return_if_fail (cache_func != NULL);
G_WRITE_LOCK (&type_rw_lock);
i = static_n_class_cache_funcs++;
static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
static_class_cache_funcs[i].cache_data = cache_data;
static_class_cache_funcs[i].cache_func = cache_func;
G_WRITE_UNLOCK (&type_rw_lock);
}
void
g_type_remove_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func)
{
gboolean found_it = FALSE;
guint i;
g_return_if_fail (cache_func != NULL);
G_WRITE_LOCK (&type_rw_lock);
for (i = 0; i < static_n_class_cache_funcs; i++)
if (static_class_cache_funcs[i].cache_data == cache_data &&
static_class_cache_funcs[i].cache_func == cache_func)
{
static_n_class_cache_funcs--;
g_memmove (static_class_cache_funcs + i,
static_class_cache_funcs + i + 1,
sizeof (static_class_cache_funcs[0]) * (static_n_class_cache_funcs - i));
static_class_cache_funcs = g_renew (ClassCacheFunc, static_class_cache_funcs, static_n_class_cache_funcs);
found_it = TRUE;
break;
}
G_WRITE_UNLOCK (&type_rw_lock);
if (!found_it)
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,
GTypeFlags flags)
{
GTypeFundamentalInfo *node_finfo;
TypeNode *node;
g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
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_I (type_name))
return 0;
if ((type_id & TYPE_ID_MASK) ||
type_id > G_TYPE_FUNDAMENTAL_MAX)
{
g_warning ("attempt to register fundamental type `%s' with invalid type id (%lu)",
type_name,
type_id);
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;
}
if (lookup_type_node_I (type_id))
{
g_warning ("cannot register existing fundamental type `%s' (as `%s')",
type_descriptive_name_I (type_id),
type_name);
return 0;
}
G_WRITE_LOCK (&type_rw_lock);
node = type_node_fundamental_new_W (type_id, type_name, finfo->type_flags);
node_finfo = type_node_fundamental_info_I (node);
type_add_flags_W (node, flags);
if (check_type_info_I (NULL, NODE_FUNDAMENTAL_TYPE (node), type_name, info))
type_data_make_W (node, info,
check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
G_WRITE_UNLOCK (&type_rw_lock);
return NODE_TYPE (node);
}
GType
g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info,
GTypeFlags flags)
{
TypeNode *pnode, *node;
GType type = 0;
g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
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_I (type_name) ||
!check_derivation_I (parent_type, type_name))
return 0;
if (info->class_finalize)
{
g_warning ("class finalizer specified for static type `%s'",
type_name);
return 0;
}
pnode = lookup_type_node_I (parent_type);
G_WRITE_LOCK (&type_rw_lock);
type_data_ref_Wm (pnode);
if (check_type_info_I (pnode, NODE_FUNDAMENTAL_TYPE (pnode), type_name, info))
{
node = type_node_new_W (pnode, type_name, NULL);
type_add_flags_W (node, flags);
type = NODE_TYPE (node);
type_data_make_W (node, info,
check_value_table_I (type_name, info->value_table) ? info->value_table : NULL);
}
G_WRITE_UNLOCK (&type_rw_lock);
return type;
}
GType
g_type_register_dynamic (GType parent_type,
const gchar *type_name,
GTypePlugin *plugin,
GTypeFlags flags)
{
TypeNode *pnode, *node;
GType type;
g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, 0);
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_I (type_name) ||
!check_derivation_I (parent_type, type_name) ||
!check_plugin_U (plugin, TRUE, FALSE, type_name))
return 0;
G_WRITE_LOCK (&type_rw_lock);
pnode = lookup_type_node_I (parent_type);
node = type_node_new_W (pnode, type_name, plugin);
type_add_flags_W (node, flags);
type = NODE_TYPE (node);
G_WRITE_UNLOCK (&type_rw_lock);
return type;
}
void
g_type_add_interface_static (GType instance_type,
GType interface_type,
const GInterfaceInfo *info)
{
/* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
G_WRITE_LOCK (&type_rw_lock);
if (check_add_interface_L (instance_type, interface_type))
{
TypeNode *node = lookup_type_node_I (instance_type);
TypeNode *iface = lookup_type_node_I (interface_type);
if (check_interface_info_I (iface, NODE_TYPE (node), info))
{
type_add_interface_W (node, iface, info, NULL);
/* if we have a class already, the interface vtable needs to
* be initialized as well
*/
if (node->data && node->data->class.class)
type_iface_vtable_init_Wm (iface, node);
}
}
G_WRITE_UNLOCK (&type_rw_lock);
}
void
g_type_add_interface_dynamic (GType instance_type,
GType interface_type,
GTypePlugin *plugin)
{
TypeNode *node;
/* G_TYPE_IS_INSTANTIATABLE() is an external call: _U */
g_return_if_fail (G_TYPE_IS_INSTANTIATABLE (instance_type));
g_return_if_fail (g_type_parent (interface_type) == G_TYPE_INTERFACE);
node = lookup_type_node_I (instance_type);
if (!check_plugin_U (plugin, FALSE, TRUE, NODE_NAME (node)))
return;
G_WRITE_LOCK (&type_rw_lock);
if (check_add_interface_L (instance_type, interface_type))
{
TypeNode *iface = lookup_type_node_I (interface_type);
type_add_interface_W (node, iface, NULL, plugin);
/* if we have a class already, the interface vtable needs to
* be initialized as well
*/
if (node->data && node->data->class.class)
type_iface_vtable_init_Wm (iface, node);
}
G_WRITE_UNLOCK (&type_rw_lock);
}
/* --- public API functions --- */
gpointer
g_type_class_ref (GType type)
{
TypeNode *node;
/* optimize for common code path
*/
G_WRITE_LOCK (&type_rw_lock);
node = lookup_type_node_I (type);
if (node && node->is_classed && node->data &&
node->data->class.class && node->data->common.ref_count > 0)
{
type_data_ref_Wm (node);
G_WRITE_UNLOCK (&type_rw_lock);
return node->data->class.class;
}
if (!node || !node->is_classed ||
(node->data && node->data->common.ref_count < 1))
{
G_WRITE_UNLOCK (&type_rw_lock);
g_warning ("cannot retrieve class for invalid (unclassed) type `%s'",
type_descriptive_name_I (type));
return NULL;
}
type_data_ref_Wm (node);
if (!node->data->class.class)
{
GType ptype = NODE_PARENT_TYPE (node);
GTypeClass *pclass = NULL;
if (ptype)
{
G_WRITE_UNLOCK (&type_rw_lock);
pclass = g_type_class_ref (ptype);
if (node->data->class.class)
INVALID_RECURSION ("g_type_plugin_*", node->plugin, NODE_NAME (node));
G_WRITE_LOCK (&type_rw_lock);
}
type_class_init_Wm (node, pclass);
}
G_WRITE_UNLOCK (&type_rw_lock);
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_I (class->g_type);
G_WRITE_LOCK (&type_rw_lock);
if (node && node->is_classed && node->data &&
node->data->class.class == class && node->data->common.ref_count > 0)
type_data_unref_Wm (node, FALSE);
else
g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
type_descriptive_name_I (class->g_type));
G_WRITE_UNLOCK (&type_rw_lock);
}
void
g_type_class_unref_uncached (gpointer g_class)
{
TypeNode *node;
GTypeClass *class = g_class;
g_return_if_fail (g_class != NULL);
G_WRITE_LOCK (&type_rw_lock);
node = lookup_type_node_I (class->g_type);
if (node && node->is_classed && node->data &&
node->data->class.class == class && node->data->common.ref_count > 0)
type_data_unref_Wm (node, TRUE);
else
g_warning ("cannot unreference class of invalid (unclassed) type `%s'",
type_descriptive_name_I (class->g_type));
G_WRITE_UNLOCK (&type_rw_lock);
}
gpointer
g_type_class_peek (GType type)
{
TypeNode *node;
gpointer class;
node = lookup_type_node_I (type);
G_READ_LOCK (&type_rw_lock);
if (node && node->is_classed && node->data && node->data->class.class) /* common.ref_count _may_ be 0 */
class = node->data->class.class;
else
class = NULL;
G_READ_UNLOCK (&type_rw_lock);
return class;
}
gpointer
g_type_class_peek_parent (gpointer g_class)
{
TypeNode *node;
gpointer class = NULL;
g_return_val_if_fail (g_class != NULL, NULL);
node = lookup_type_node_I (G_TYPE_FROM_CLASS (g_class));
G_READ_LOCK (&type_rw_lock);
if (node && node->is_classed && node->data && NODE_PARENT_TYPE (node))
{
node = lookup_type_node_I (NODE_PARENT_TYPE (node));
class = node->data->class.class;
}
else if (NODE_PARENT_TYPE (node))
g_warning (G_STRLOC ": invalid class pointer `%p'", g_class);
G_READ_UNLOCK (&type_rw_lock);
return class;
}
gpointer
g_type_interface_peek (gpointer instance_class,
GType iface_type)
{
TypeNode *node;
TypeNode *iface;
gpointer vtable = NULL;
GTypeClass *class = instance_class;
g_return_val_if_fail (instance_class != NULL, NULL);
node = lookup_type_node_I (class->g_type);
iface = lookup_type_node_I (iface_type);
if (node && node->is_instantiatable && iface)
{
IFaceEntry *entry;
G_READ_LOCK (&type_rw_lock);
entry = type_lookup_iface_entry_L (node, iface);
if (entry && entry->vtable) /* entry is relocatable */
vtable = entry->vtable;
G_READ_UNLOCK (&type_rw_lock);
}
else
g_warning (G_STRLOC ": invalid class pointer `%p'", class);
return vtable;
}
gpointer
g_type_interface_peek_parent (gpointer g_iface)
{
TypeNode *node;
TypeNode *iface;
gpointer vtable = NULL;
GTypeInterface *iface_class = g_iface;
g_return_val_if_fail (g_iface != NULL, NULL);
iface = lookup_type_node_I (iface_class->g_type);
node = lookup_type_node_I (iface_class->g_instance_type);
if (node)
node = lookup_type_node_I (NODE_PARENT_TYPE (node));
if (node && node->is_instantiatable && iface)
{
IFaceEntry *entry;
G_READ_LOCK (&type_rw_lock);
entry = type_lookup_iface_entry_L (node, iface);
if (entry && entry->vtable) /* entry is relocatable */
vtable = entry->vtable;
G_READ_UNLOCK (&type_rw_lock);
}
else if (node)
g_warning (G_STRLOC ": invalid interface pointer `%p'", g_iface);
return vtable;
}
G_CONST_RETURN gchar*
g_type_name (GType type)
{
TypeNode *node;
g_return_val_if_uninitialized (static_quark_type_flags, g_type_init, NULL);
node = lookup_type_node_I (type);
return node ? NODE_NAME (node) : NULL;
}
GQuark
g_type_qname (GType type)
{
TypeNode *node;
node = lookup_type_node_I (type);
return node ? node->qname : 0;
}
GType
g_type_from_name (const gchar *name)
{
GType type = 0;
GQuark quark;
g_return_val_if_fail (name != NULL, 0);
quark = g_quark_try_string (name);
if (quark)
{
G_READ_LOCK (&type_rw_lock);
type = (GType) g_hash_table_lookup (static_type_nodes_ht, GUINT_TO_POINTER (quark));
G_READ_UNLOCK (&type_rw_lock);
}
return type;
}
GType
g_type_parent (GType type)
{
TypeNode *node;
node = lookup_type_node_I (type);
return node ? NODE_PARENT_TYPE (node) : 0;
}
guint
g_type_depth (GType type)
{
TypeNode *node;
node = lookup_type_node_I (type);
return node ? node->n_supers + 1 : 0;
}
GType
g_type_next_base (GType type,
GType base_type)
{
GType atype = 0;
TypeNode *node;
node = lookup_type_node_I (type);
if (node)
{
TypeNode *base_node = lookup_type_node_I (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)
atype = node->supers[n - 1];
}
}
return atype;
}
static inline gboolean
type_node_check_conformities_UorL (TypeNode *node,
TypeNode *iface_node,
/* support_inheritance */
gboolean support_interfaces,
gboolean support_prerequisites,
gboolean have_lock)
{
gboolean match;
if (/* support_inheritance && */
iface_node->n_supers <= node->n_supers &&
node->supers[node->n_supers - iface_node->n_supers] == NODE_TYPE (iface_node))
return TRUE;
support_interfaces = support_interfaces && node->is_instantiatable && NODE_IS_IFACE (iface_node);
support_prerequisites = support_prerequisites && NODE_IS_IFACE (node);
match = FALSE;
if (support_interfaces || support_prerequisites)
{
if (!have_lock)
G_READ_LOCK (&type_rw_lock);
if (support_interfaces && type_lookup_iface_entry_L (node, iface_node))
match = TRUE;
else if (support_prerequisites && type_lookup_prerequisite_L (node, NODE_TYPE (iface_node)))
match = TRUE;
if (!have_lock)
G_READ_UNLOCK (&type_rw_lock);
}
return match;
}
static gboolean
type_node_is_a_L (TypeNode *node,
TypeNode *iface_node)
{
return type_node_check_conformities_UorL (node, iface_node, TRUE, TRUE, TRUE);
}
static inline gboolean
type_node_conforms_to_U (TypeNode *node,
TypeNode *iface_node,
gboolean support_interfaces,
gboolean support_prerequisites)
{
return type_node_check_conformities_UorL (node, iface_node, support_interfaces, support_prerequisites, FALSE);
}
gboolean
g_type_is_a (GType type,
GType iface_type)
{
TypeNode *node, *iface_node;
gboolean is_a;
node = lookup_type_node_I (type);
iface_node = lookup_type_node_I (iface_type);
is_a = node && iface_node && type_node_conforms_to_U (node, iface_node, TRUE, TRUE);
return is_a;
}
GType* /* free result */
g_type_children (GType type,
guint *n_children)
{
TypeNode *node;
node = lookup_type_node_I (type);
if (node)
{
GType *children;
G_READ_LOCK (&type_rw_lock); /* ->children is relocatable */
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;
G_READ_UNLOCK (&type_rw_lock);
return children;
}
else
{
if (n_children)
*n_children = 0;
return NULL;
}
}
GType* /* free result */
g_type_interfaces (GType type,
guint *n_interfaces)
{
TypeNode *node;
node = lookup_type_node_I (type);
if (node && node->is_instantiatable)
{
GType *ifaces;
guint i;
G_READ_LOCK (&type_rw_lock);
ifaces = g_new (GType, CLASSED_NODE_N_IFACES (node) + 1);
for (i = 0; i < CLASSED_NODE_N_IFACES (node); i++)
ifaces[i] = CLASSED_NODE_IFACES_ENTRIES (node)[i].iface_type;
ifaces[i] = 0;
if (n_interfaces)
*n_interfaces = CLASSED_NODE_N_IFACES (node);
G_READ_UNLOCK (&type_rw_lock);
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;
};
static inline gpointer
type_get_qdata_L (TypeNode *node,
GQuark quark)
{
GData *gdata = node->global_gdata;
if (quark && gdata && gdata->n_qdatas)
{
QData *qdatas = gdata->qdatas - 1;
guint n_qdatas = gdata->n_qdatas;
do
{
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;
}
gpointer
g_type_get_qdata (GType type,
GQuark quark)
{
TypeNode *node;
gpointer data;
node = lookup_type_node_I (type);
if (node)
{
G_READ_LOCK (&type_rw_lock);
data = type_get_qdata_L (node, quark);
G_READ_UNLOCK (&type_rw_lock);
}
else
{
g_return_val_if_fail (node != NULL, NULL);
data = NULL;
}
return data;
}
static inline void
type_set_qdata_W (TypeNode *node,
GQuark quark,
gpointer data)
{
GData *gdata;
QData *qdata;
guint i;
/* setup qdata list if necessary */
if (!node->global_gdata)
node->global_gdata = g_new0 (GData, 1);
gdata = node->global_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;
}
void
g_type_set_qdata (GType type,
GQuark quark,
gpointer data)
{
TypeNode *node;
g_return_if_fail (quark != 0);
node = lookup_type_node_I (type);
if (node)
{
G_WRITE_LOCK (&type_rw_lock);
type_set_qdata_W (node, quark, data);
G_WRITE_UNLOCK (&type_rw_lock);
}
else
g_return_if_fail (node != NULL);
}
static void
type_add_flags_W (TypeNode *node,
GTypeFlags flags)
{
guint dflags;
g_return_if_fail ((flags & ~TYPE_FLAG_MASK) == 0);
g_return_if_fail (node != NULL);
if ((flags & TYPE_FLAG_MASK) && node->is_classed && node->data && node->data->class.class)
g_warning ("tagging type `%s' as abstract after class initialization", NODE_NAME (node));
dflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
dflags |= flags;
type_set_qdata_W (node, static_quark_type_flags, GUINT_TO_POINTER (dflags));
}
void
g_type_query (GType type,
GTypeQuery *query)
{
TypeNode *node;
g_return_if_fail (query != NULL);
/* if node is not static and classed, we won't allow query */
query->type = 0;
node = lookup_type_node_I (type);
if (node && node->is_classed && !node->plugin)
{
/* type is classed and probably even instantiatable */
G_READ_LOCK (&type_rw_lock);
if (node->data) /* type is static or referenced */
{
query->type = NODE_TYPE (node);
query->type_name = NODE_NAME (node);
query->class_size = node->data->class.class_size;
query->instance_size = node->is_instantiatable ? node->data->instance.instance_size : 0;
}
G_READ_UNLOCK (&type_rw_lock);
}
}
/* --- implementation details --- */
gboolean
g_type_test_flags (GType type,
guint flags)
{
TypeNode *node;
gboolean result = FALSE;
node = lookup_type_node_I (type);
if (node)
{
guint fflags = flags & TYPE_FUNDAMENTAL_FLAG_MASK;
guint tflags = flags & TYPE_FLAG_MASK;
if (fflags)
{
GTypeFundamentalInfo *finfo = type_node_fundamental_info_I (node);
fflags = (finfo->type_flags & fflags) == fflags;
}
else
fflags = TRUE;
if (tflags)
{
G_READ_LOCK (&type_rw_lock);
tflags = (tflags & GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags))) == tflags;
G_READ_UNLOCK (&type_rw_lock);
}
else
tflags = TRUE;
result = tflags && fflags;
}
return result;
}
GTypePlugin*
g_type_get_plugin (GType type)
{
TypeNode *node;
node = lookup_type_node_I (type);
return node ? node->plugin : NULL;
}
GTypePlugin*
g_type_interface_get_plugin (GType instance_type,
GType interface_type)
{
TypeNode *node;
TypeNode *iface;
g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL); /* G_TYPE_IS_INTERFACE() is an external call: _U */
node = lookup_type_node_I (instance_type);
iface = lookup_type_node_I (interface_type);
if (node && iface)
{
IFaceHolder *iholder;
GTypePlugin *plugin;
G_READ_LOCK (&type_rw_lock);
iholder = iface_node_get_holders_L (iface);
while (iholder && iholder->instance_type != instance_type)
iholder = iholder->next;
plugin = iholder ? iholder->plugin : NULL;
G_READ_UNLOCK (&type_rw_lock);
return plugin;
}
g_return_val_if_fail (node == NULL, NULL);
g_return_val_if_fail (iface == NULL, NULL);
g_warning (G_STRLOC ": attempt to look up plugin for invalid instance/interface type pair.");
return NULL;
}
GType
g_type_fundamental_next (void)
{
GType type;
G_READ_LOCK (&type_rw_lock);
type = static_fundamental_next;
G_READ_UNLOCK (&type_rw_lock);
return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
}
GType
g_type_fundamental (GType type_id)
{
TypeNode *node = lookup_type_node_I (type_id);
return node ? NODE_FUNDAMENTAL_TYPE (node) : 0;
}
gboolean
g_type_check_instance_is_a (GTypeInstance *type_instance,
GType iface_type)
{
TypeNode *node, *iface;
gboolean check;
if (!type_instance || !type_instance->g_class)
return FALSE;
node = lookup_type_node_I (type_instance->g_class->g_type);
iface = lookup_type_node_I (iface_type);
check = node && node->is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
return check;
}
gboolean
g_type_check_class_is_a (GTypeClass *type_class,
GType is_a_type)
{
TypeNode *node, *iface;
gboolean check;
if (!type_class)
return FALSE;
node = lookup_type_node_I (type_class->g_type);
iface = lookup_type_node_I (is_a_type);
check = node && node->is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
return check;
}
GTypeInstance*
g_type_check_instance_cast (GTypeInstance *type_instance,
GType iface_type)
{
if (type_instance)
{
if (type_instance->g_class)
{
TypeNode *node, *iface;
gboolean is_instantiatable, check;
node = lookup_type_node_I (type_instance->g_class->g_type);
is_instantiatable = node && node->is_instantiatable;
iface = lookup_type_node_I (iface_type);
check = is_instantiatable && iface && type_node_conforms_to_U (node, iface, TRUE, FALSE);
if (check)
return type_instance;
if (is_instantiatable)
g_warning ("invalid cast from `%s' to `%s'",
type_descriptive_name_I (type_instance->g_class->g_type),
type_descriptive_name_I (iface_type));
else
g_warning ("invalid uninstantiatable type `%s' in cast to `%s'",
type_descriptive_name_I (type_instance->g_class->g_type),
type_descriptive_name_I (iface_type));
}
else
g_warning ("invalid unclassed pointer in cast to `%s'",
type_descriptive_name_I (iface_type));
}
else
g_warning ("invalid cast from (NULL) pointer to `%s'",
type_descriptive_name_I (iface_type));
return type_instance;
}
GTypeClass*
g_type_check_class_cast (GTypeClass *type_class,
GType is_a_type)
{
if (type_class)
{
TypeNode *node, *iface;
gboolean is_classed, check;
node = lookup_type_node_I (type_class->g_type);
is_classed = node && node->is_classed;
iface = lookup_type_node_I (is_a_type);
check = is_classed && iface && type_node_conforms_to_U (node, iface, FALSE, FALSE);
if (check)
return type_class;
if (is_classed)
g_warning ("invalid class cast from `%s' to `%s'",
type_descriptive_name_I (type_class->g_type),
type_descriptive_name_I (is_a_type));
else
g_warning ("invalid unclassed type `%s' in class cast to `%s'",
type_descriptive_name_I (type_class->g_type),
type_descriptive_name_I (is_a_type));
}
else
g_warning ("invalid class cast from (NULL) pointer to `%s'",
type_descriptive_name_I (is_a_type));
return type_class;
}
gboolean
g_type_check_instance (GTypeInstance *type_instance)
{
/* this function is just here to make the signal system
* conveniently elaborated on instance checks
*/
if (type_instance)
{
if (type_instance->g_class)
{
TypeNode *node = lookup_type_node_I (type_instance->g_class->g_type);
if (node && node->is_instantiatable)
return TRUE;
g_warning ("instance of invalid non-instantiatable type `%s'",
type_descriptive_name_I (type_instance->g_class->g_type));
}
else
g_warning ("instance with invalid (NULL) class pointer");
}
else
g_warning ("invalid (NULL) pointer instance");
return FALSE;
}
static inline gboolean
type_check_is_value_type_U (GType type)
{
GTypeFlags tflags = G_TYPE_FLAG_VALUE_ABSTRACT;
TypeNode *node;
/* common path speed up */
node = lookup_type_node_I (type);
if (node && node->mutatable_check_cache)
return TRUE;
G_READ_LOCK (&type_rw_lock);
restart_check:
if (node)
{
if (node->data && node->data->common.ref_count > 0 &&
node->data->common.value_table->value_init)
tflags = GPOINTER_TO_UINT (type_get_qdata_L (node, static_quark_type_flags));
else if (NODE_IS_IFACE (node))
{
guint i;
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
{
GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
TypeNode *prnode = lookup_type_node_I (prtype);
if (prnode->is_instantiatable)
{
type = prtype;
node = lookup_type_node_I (type);
goto restart_check;
}
}
}
}
G_READ_UNLOCK (&type_rw_lock);
return !(tflags & G_TYPE_FLAG_VALUE_ABSTRACT);
}
gboolean
g_type_check_is_value_type (GType type)
{
return type_check_is_value_type_U (type);
}
gboolean
g_type_check_value (GValue *value)
{
return value && type_check_is_value_type_U (value->g_type);
}
gboolean
g_type_check_value_holds (GValue *value,
GType type)
{
return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
}
GTypeValueTable*
g_type_value_table_peek (GType type)
{
GTypeValueTable *vtable = NULL;
TypeNode *node = lookup_type_node_I (type);
gboolean has_refed_data, has_table;
TypeData *data;
/* speed up common code path, we're not 100% safe here,
* but we should only get called with referenced types anyway
*/
data = node ? node->data : NULL;
if (node && node->mutatable_check_cache)
return data->common.value_table;
G_READ_LOCK (&type_rw_lock);
restart_table_peek:
has_refed_data = node && node->data && node->data->common.ref_count;
has_table = has_refed_data && node->data->common.value_table->value_init;
if (has_refed_data)
{
if (has_table)
vtable = node->data->common.value_table;
else if (NODE_IS_IFACE (node))
{
guint i;
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (node); i++)
{
GType prtype = IFACE_NODE_PREREQUISITES (node)[i];
TypeNode *prnode = lookup_type_node_I (prtype);
if (prnode->is_instantiatable)
{
type = prtype;
node = lookup_type_node_I (type);
goto restart_table_peek;
}
}
}
}
G_READ_UNLOCK (&type_rw_lock);
if (vtable)
return vtable;
if (!node)
g_warning (G_STRLOC ": type id `%lu' is invalid", type);
if (!has_refed_data)
g_warning ("can't peek value table for type `%s' which is not currently referenced",
type_descriptive_name_I (type));
return NULL;
}
G_CONST_RETURN gchar*
g_type_name_from_instance (GTypeInstance *instance)
{
if (!instance)
return "<NULL-instance>";
else
return g_type_name_from_class (instance->g_class);
}
G_CONST_RETURN gchar*
g_type_name_from_class (GTypeClass *g_class)
{
if (!g_class)
return "<NULL-class>";
else
return g_type_name (g_class->g_type);
}
/* --- foreign prototypes --- */
extern void g_value_c_init (void); /* sync with gvalue.c */
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_boxed_type_init (void); /* sync with gboxed.c */
extern void g_object_type_init (void); /* sync with gobject.c */
extern void g_param_spec_types_init (void); /* sync with gparamspecs.c */
extern void g_value_transforms_init (void); /* sync with gvaluetransform.c */
extern void g_signal_init (void); /* sync with gsignal.c */
/* --- initialization --- */
void
g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
{
G_LOCK_DEFINE_STATIC (type_init_lock);
const gchar *env_string;
GTypeInfo info;
TypeNode *node;
GType type;
G_LOCK (type_init_lock);
G_WRITE_LOCK (&type_rw_lock);
if (static_quark_type_flags)
{
G_WRITE_UNLOCK (&type_rw_lock);
G_UNLOCK (type_init_lock);
return;
}
/* setup GObject library wide debugging flags */
_g_type_debug_flags = debug_flags & G_TYPE_DEBUG_MASK;
env_string = g_getenv ("GOBJECT_DEBUG");
if (env_string != NULL)
{
static GDebugKey debug_keys[] = {
{ "objects", G_TYPE_DEBUG_OBJECTS },
{ "signals", G_TYPE_DEBUG_SIGNALS },
};
_g_type_debug_flags |= g_parse_debug_string (env_string,
debug_keys,
sizeof (debug_keys) / sizeof (debug_keys[0]));
env_string = NULL;
}
/* quarks */
static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
/* type qname hash table */
static_type_nodes_ht = g_hash_table_new (g_direct_hash, g_direct_equal);
/* invalid type G_TYPE_INVALID (0)
*/
static_fundamental_type_nodes[0] = NULL;
/* void type G_TYPE_NONE
*/
node = type_node_fundamental_new_W (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_W (G_TYPE_INTERFACE, "GInterface", G_TYPE_FLAG_DERIVABLE);
type = NODE_TYPE (node);
type_data_make_W (node, &info, NULL);
g_assert (type == G_TYPE_INTERFACE);
G_WRITE_UNLOCK (&type_rw_lock);
g_value_c_init ();
/* G_TYPE_TYPE_PLUGIN
*/
g_type_plugin_get_type ();
/* G_TYPE_* value types
*/
g_value_types_init ();
/* G_TYPE_ENUM & G_TYPE_FLAGS
*/
g_enum_types_init ();
/* G_TYPE_BOXED
*/
g_boxed_type_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 ();
/* Value Transformations
*/
g_value_transforms_init ();
/* Signal system
*/
g_signal_init ();
G_UNLOCK (type_init_lock);
}
void
g_type_init (void)
{
g_type_init_with_debug_flags (0);
}
Reference in New Issue View Git Blame Copy Permalink