mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-09 02:46:16 +01:00
bee07cebcd
gobject/gtype.c:1103:55: warning: missing field 'value_free' initializer
static const GTypeValueTable zero_vtable = { NULL, };
^
4965 lines
146 KiB
C
4965 lines
146 KiB
C
/* 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 2.1 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, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
/*
|
||
* MT safe
|
||
*/
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||
|
||
#include "config.h"
|
||
|
||
#include "../glib/gvalgrind.h"
|
||
#include <string.h>
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||
|
||
#include "gtype.h"
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||
#include "gtype-private.h"
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||
#include "gtypeplugin.h"
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||
#include "gvaluecollector.h"
|
||
#include "gatomicarray.h"
|
||
#include "gobject_trace.h"
|
||
|
||
#include "glib-private.h"
|
||
#include "gconstructor.h"
|
||
|
||
#ifdef G_OS_WIN32
|
||
#include <windows.h>
|
||
#endif
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
#define IF_DEBUG(debug_type) if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type)
|
||
#endif
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||
|
||
/**
|
||
* SECTION:gtype
|
||
* @short_description: The GLib Runtime type identification and
|
||
* management system
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||
* @title:Type Information
|
||
*
|
||
* The GType API is the foundation of the GObject system. It provides the
|
||
* facilities for registering and managing all fundamental data types,
|
||
* user-defined object and interface types.
|
||
*
|
||
* For type creation and registration purposes, all types fall into one of
|
||
* two categories: static or dynamic. Static types are never loaded or
|
||
* unloaded at run-time as dynamic types may be. Static types are created
|
||
* with g_type_register_static() that gets type specific information passed
|
||
* in via a #GTypeInfo structure.
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||
*
|
||
* Dynamic types are created with g_type_register_dynamic() which takes a
|
||
* #GTypePlugin structure instead. The remaining type information (the
|
||
* #GTypeInfo structure) is retrieved during runtime through #GTypePlugin
|
||
* and the g_type_plugin_*() API.
|
||
*
|
||
* These registration functions are usually called only once from a
|
||
* function whose only purpose is to return the type identifier for a
|
||
* specific class. Once the type (or class or interface) is registered,
|
||
* it may be instantiated, inherited, or implemented depending on exactly
|
||
* what sort of type it is.
|
||
*
|
||
* There is also a third registration function for registering fundamental
|
||
* types called g_type_register_fundamental() which requires both a #GTypeInfo
|
||
* structure and a #GTypeFundamentalInfo structure but it is seldom used
|
||
* since most fundamental types are predefined rather than user-defined.
|
||
*
|
||
* Type instance and class structs are limited to a total of 64 KiB,
|
||
* including all parent types. Similarly, type instances' private data
|
||
* (as created by G_ADD_PRIVATE()) are limited to a total of
|
||
* 64 KiB. If a type instance needs a large static buffer, allocate it
|
||
* separately (typically by using #GArray or #GPtrArray) and put a pointer
|
||
* to the buffer in the structure.
|
||
*
|
||
* As mentioned in the [GType conventions][gtype-conventions], type names must
|
||
* be at least three characters long. There is no upper length limit. The first
|
||
* character must be a letter (a–z or A–Z) or an underscore (‘_’). Subsequent
|
||
* characters can be letters, numbers or any of ‘-_+’.
|
||
*/
|
||
|
||
|
||
/* 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.
|
||
*
|
||
* 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 invocation
|
||
* - _Wm: [Write-locked invocation, mutatable]
|
||
* like _W, but the write lock might be released and reacquired
|
||
* during invocation, watch your pointers
|
||
* - _WmREC: [Write-locked invocation, mutatable, recursive]
|
||
* like _Wm, but also acquires recursive mutex class_init_rec_mutex
|
||
*/
|
||
|
||
#ifdef LOCK_DEBUG
|
||
#define G_READ_LOCK(rw_lock) do { g_printerr (G_STRLOC ": readL++\n"); g_rw_lock_reader_lock (rw_lock); } while (0)
|
||
#define G_READ_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": readL--\n"); g_rw_lock_reader_unlock (rw_lock); } while (0)
|
||
#define G_WRITE_LOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL++\n"); g_rw_lock_writer_lock (rw_lock); } while (0)
|
||
#define G_WRITE_UNLOCK(rw_lock) do { g_printerr (G_STRLOC ": writeL--\n"); g_rw_lock_writer_unlock (rw_lock); } while (0)
|
||
#else
|
||
#define G_READ_LOCK(rw_lock) g_rw_lock_reader_lock (rw_lock)
|
||
#define G_READ_UNLOCK(rw_lock) g_rw_lock_reader_unlock (rw_lock)
|
||
#define G_WRITE_LOCK(rw_lock) g_rw_lock_writer_lock (rw_lock)
|
||
#define G_WRITE_UNLOCK(rw_lock) g_rw_lock_writer_unlock (rw_lock)
|
||
#endif
|
||
#define INVALID_RECURSION(func, arg, type_name) G_STMT_START{ \
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||
static const gchar _action[] = " invalidly modified type "; \
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||
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_assert_type_system_initialized() \
|
||
g_assert (static_quark_type_flags)
|
||
|
||
#define TYPE_FUNDAMENTAL_FLAG_MASK (G_TYPE_FLAG_CLASSED | \
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||
G_TYPE_FLAG_INSTANTIATABLE | \
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||
G_TYPE_FLAG_DERIVABLE | \
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||
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)))
|
||
|
||
/* The 2*sizeof(size_t) alignment here is borrowed from
|
||
* GNU libc, so it should be good most everywhere.
|
||
* It is more conservative than is needed on some 64-bit
|
||
* platforms, but ia64 does require a 16-byte alignment.
|
||
* The SIMD extensions for x86 and ppc32 would want a
|
||
* larger alignment than this, but we don't need to
|
||
* do better than malloc.
|
||
*/
|
||
#define STRUCT_ALIGNMENT (2 * sizeof (gsize))
|
||
#define ALIGN_STRUCT(offset) \
|
||
((offset + (STRUCT_ALIGNMENT - 1)) & -STRUCT_ALIGNMENT)
|
||
|
||
|
||
/* --- typedefs --- */
|
||
typedef struct _TypeNode TypeNode;
|
||
typedef struct _CommonData CommonData;
|
||
typedef struct _BoxedData BoxedData;
|
||
typedef struct _IFaceData IFaceData;
|
||
typedef struct _ClassData ClassData;
|
||
typedef struct _InstanceData InstanceData;
|
||
typedef union _TypeData TypeData;
|
||
typedef struct _IFaceEntries IFaceEntries;
|
||
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_U (TypeNode *node,
|
||
gboolean uncached);
|
||
static void type_data_last_unref_Wm (TypeNode * node,
|
||
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_iface_vtable_base_init_Wm (TypeNode *iface,
|
||
TypeNode *node);
|
||
static void type_iface_vtable_iface_init_Wm (TypeNode *iface,
|
||
TypeNode *node);
|
||
static gboolean type_node_is_a_L (TypeNode *node,
|
||
TypeNode *iface_node);
|
||
|
||
|
||
/* --- enumeration --- */
|
||
|
||
/* The InitState enumeration is used to track the progress of initializing
|
||
* both classes and interface vtables. Keeping the state of initialization
|
||
* is necessary to handle new interfaces being added while we are initializing
|
||
* the class or other interfaces.
|
||
*/
|
||
typedef enum
|
||
{
|
||
UNINITIALIZED,
|
||
BASE_CLASS_INIT,
|
||
BASE_IFACE_INIT,
|
||
CLASS_INIT,
|
||
IFACE_INIT,
|
||
INITIALIZED
|
||
} InitState;
|
||
|
||
/* --- structures --- */
|
||
struct _TypeNode
|
||
{
|
||
guint ref_count; /* (atomic) */
|
||
#ifdef G_ENABLE_DEBUG
|
||
guint instance_count; /* (atomic) */
|
||
#endif
|
||
GTypePlugin *plugin;
|
||
guint n_children; /* writable with lock */
|
||
guint n_supers : 8;
|
||
guint n_prerequisites : 9;
|
||
guint is_classed : 1;
|
||
guint is_instantiatable : 1;
|
||
guint mutatable_check_cache : 1; /* combines some common path checks */
|
||
GType *children; /* writable with lock */
|
||
TypeData *data;
|
||
GQuark qname;
|
||
GData *global_gdata;
|
||
union {
|
||
GAtomicArray iface_entries; /* for !iface types */
|
||
GAtomicArray offsets;
|
||
} _prot;
|
||
GType *prerequisites;
|
||
GType supers[1]; /* flexible array */
|
||
};
|
||
|
||
#define SIZEOF_BASE_TYPE_NODE() (G_STRUCT_OFFSET (TypeNode, supers))
|
||
#define MAX_N_SUPERS (255)
|
||
#define MAX_N_CHILDREN (G_MAXUINT)
|
||
#define MAX_N_INTERFACES (255) /* Limited by offsets being 8 bits */
|
||
#define MAX_N_PREREQUISITES (511)
|
||
#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_REFCOUNT(node) ((guint) g_atomic_int_get ((int *) &(node)->ref_count))
|
||
#define NODE_IS_BOXED(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_BOXED)
|
||
#define NODE_IS_IFACE(node) (NODE_FUNDAMENTAL_TYPE (node) == G_TYPE_INTERFACE)
|
||
#define CLASSED_NODE_IFACES_ENTRIES(node) (&(node)->_prot.iface_entries)
|
||
#define CLASSED_NODE_IFACES_ENTRIES_LOCKED(node)(G_ATOMIC_ARRAY_GET_LOCKED(CLASSED_NODE_IFACES_ENTRIES((node)), IFaceEntries))
|
||
#define IFACE_NODE_N_PREREQUISITES(node) ((node)->n_prerequisites)
|
||
#define IFACE_NODE_PREREQUISITES(node) ((node)->prerequisites)
|
||
#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))
|
||
|
||
#define NODE_IS_ANCESTOR(ancestor, node) \
|
||
((ancestor)->n_supers <= (node)->n_supers && \
|
||
(node)->supers[(node)->n_supers - (ancestor)->n_supers] == NODE_TYPE (ancestor))
|
||
|
||
struct _IFaceHolder
|
||
{
|
||
GType instance_type;
|
||
GInterfaceInfo *info;
|
||
GTypePlugin *plugin;
|
||
IFaceHolder *next;
|
||
};
|
||
|
||
struct _IFaceEntry
|
||
{
|
||
GType iface_type;
|
||
GTypeInterface *vtable;
|
||
InitState init_state;
|
||
};
|
||
|
||
struct _IFaceEntries {
|
||
gsize offset_index;
|
||
IFaceEntry entry[1];
|
||
};
|
||
|
||
#define IFACE_ENTRIES_HEADER_SIZE (sizeof(IFaceEntries) - sizeof(IFaceEntry))
|
||
#define IFACE_ENTRIES_N_ENTRIES(_entries) ( (G_ATOMIC_ARRAY_DATA_SIZE((_entries)) - IFACE_ENTRIES_HEADER_SIZE) / sizeof(IFaceEntry) )
|
||
|
||
struct _CommonData
|
||
{
|
||
GTypeValueTable *value_table;
|
||
};
|
||
|
||
struct _BoxedData
|
||
{
|
||
CommonData data;
|
||
GBoxedCopyFunc copy_func;
|
||
GBoxedFreeFunc free_func;
|
||
};
|
||
|
||
struct _IFaceData
|
||
{
|
||
CommonData common;
|
||
guint16 vtable_size;
|
||
GBaseInitFunc vtable_init_base;
|
||
GBaseFinalizeFunc vtable_finalize_base;
|
||
GClassInitFunc dflt_init;
|
||
GClassFinalizeFunc dflt_finalize;
|
||
gconstpointer dflt_data;
|
||
gpointer dflt_vtable;
|
||
};
|
||
|
||
struct _ClassData
|
||
{
|
||
CommonData common;
|
||
guint16 class_size;
|
||
guint16 class_private_size;
|
||
int init_state; /* (atomic) - g_type_class_ref reads it unlocked */
|
||
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;
|
||
guint16 class_private_size;
|
||
int init_state; /* (atomic) - g_type_class_ref reads it unlocked */
|
||
GBaseInitFunc class_init_base;
|
||
GBaseFinalizeFunc class_finalize_base;
|
||
GClassInitFunc class_init;
|
||
GClassFinalizeFunc class_finalize;
|
||
gconstpointer class_data;
|
||
gpointer class;
|
||
guint16 instance_size;
|
||
guint16 private_size;
|
||
guint16 n_preallocs;
|
||
GInstanceInitFunc instance_init;
|
||
};
|
||
|
||
union _TypeData
|
||
{
|
||
CommonData common;
|
||
BoxedData boxed;
|
||
IFaceData iface;
|
||
ClassData class;
|
||
InstanceData instance;
|
||
};
|
||
|
||
typedef struct {
|
||
gpointer cache_data;
|
||
GTypeClassCacheFunc cache_func;
|
||
} ClassCacheFunc;
|
||
|
||
typedef struct {
|
||
gpointer check_data;
|
||
GTypeInterfaceCheckFunc check_func;
|
||
} IFaceCheckFunc;
|
||
|
||
|
||
/* --- variables --- */
|
||
static GRWLock type_rw_lock;
|
||
static GRecMutex class_init_rec_mutex;
|
||
static guint static_n_class_cache_funcs = 0;
|
||
static ClassCacheFunc *static_class_cache_funcs = NULL;
|
||
static guint static_n_iface_check_funcs = 0;
|
||
static IFaceCheckFunc *static_iface_check_funcs = NULL;
|
||
static GQuark static_quark_type_flags = 0;
|
||
static GQuark static_quark_iface_holder = 0;
|
||
static GQuark static_quark_dependants_array = 0;
|
||
static guint type_registration_serial = 0;
|
||
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
GTypeDebugFlags _g_type_debug_flags = 0;
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
/* --- type nodes --- */
|
||
static GHashTable *static_type_nodes_ht = NULL;
|
||
static TypeNode *static_fundamental_type_nodes[(G_TYPE_FUNDAMENTAL_MAX >> G_TYPE_FUNDAMENTAL_SHIFT) + 1] = { NULL, };
|
||
static GType static_fundamental_next = G_TYPE_RESERVED_USER_FIRST;
|
||
|
||
static inline TypeNode*
|
||
lookup_type_node_I (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];
|
||
}
|
||
|
||
/**
|
||
* g_type_get_type_registration_serial:
|
||
*
|
||
* Returns an opaque serial number that represents the state of the set
|
||
* of registered types. Any time a type is registered this serial changes,
|
||
* which means you can cache information based on type lookups (such as
|
||
* g_type_from_name()) and know if the cache is still valid at a later
|
||
* time by comparing the current serial with the one at the type lookup.
|
||
*
|
||
* Since: 2.36
|
||
*
|
||
* Returns: An unsigned int, representing the state of type registrations
|
||
*/
|
||
guint
|
||
g_type_get_type_registration_serial (void)
|
||
{
|
||
return (guint)g_atomic_int_get ((gint *)&type_registration_serial);
|
||
}
|
||
|
||
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;
|
||
|
||
#if ENABLE_VALGRIND
|
||
VALGRIND_MALLOCLIKE_BLOCK (node, node_size - SIZEOF_FUNDAMENTAL_INFO, FALSE, TRUE);
|
||
#endif
|
||
}
|
||
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
|
||
_g_atomic_array_init (CLASSED_NODE_IFACES_ENTRIES (node));
|
||
}
|
||
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;
|
||
IFaceEntries *entries;
|
||
|
||
entries = _g_atomic_array_copy (CLASSED_NODE_IFACES_ENTRIES (pnode),
|
||
IFACE_ENTRIES_HEADER_SIZE,
|
||
0);
|
||
if (entries)
|
||
{
|
||
for (j = 0; j < IFACE_ENTRIES_N_ENTRIES (entries); j++)
|
||
{
|
||
entries->entry[j].vtable = NULL;
|
||
entries->entry[j].init_state = UNINITIALIZED;
|
||
}
|
||
_g_atomic_array_update (CLASSED_NODE_IFACES_ENTRIES (node),
|
||
entries);
|
||
}
|
||
}
|
||
|
||
i = pnode->n_children++;
|
||
pnode->children = g_renew (GType, pnode->children, pnode->n_children);
|
||
pnode->children[i] = type;
|
||
}
|
||
|
||
TRACE(GOBJECT_TYPE_NEW(name, node->supers[1], 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,
|
||
(gpointer) g_quark_to_string (node->qname),
|
||
(gpointer) type);
|
||
|
||
g_atomic_int_inc ((gint *)&type_registration_serial);
|
||
|
||
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 >> G_TYPE_FUNDAMENTAL_SHIFT == static_fundamental_next)
|
||
static_fundamental_next++;
|
||
|
||
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*
|
||
lookup_iface_entry_I (IFaceEntries *entries,
|
||
TypeNode *iface_node)
|
||
{
|
||
guint8 *offsets;
|
||
gsize offset_index;
|
||
IFaceEntry *check;
|
||
gsize index;
|
||
IFaceEntry *entry;
|
||
|
||
if (entries == NULL)
|
||
return NULL;
|
||
|
||
G_ATOMIC_ARRAY_DO_TRANSACTION
|
||
(&iface_node->_prot.offsets, guint8,
|
||
|
||
entry = NULL;
|
||
offsets = transaction_data;
|
||
offset_index = entries->offset_index;
|
||
if (offsets != NULL &&
|
||
offset_index < G_ATOMIC_ARRAY_DATA_SIZE(offsets))
|
||
{
|
||
index = offsets[offset_index];
|
||
if (index > 0)
|
||
{
|
||
/* zero means unset, subtract one to get real index */
|
||
index -= 1;
|
||
|
||
if (index < IFACE_ENTRIES_N_ENTRIES (entries))
|
||
{
|
||
check = (IFaceEntry *)&entries->entry[index];
|
||
if (check->iface_type == NODE_TYPE (iface_node))
|
||
entry = check;
|
||
}
|
||
}
|
||
}
|
||
);
|
||
|
||
return entry;
|
||
}
|
||
|
||
static inline IFaceEntry*
|
||
type_lookup_iface_entry_L (TypeNode *node,
|
||
TypeNode *iface_node)
|
||
{
|
||
if (!NODE_IS_IFACE (iface_node))
|
||
return NULL;
|
||
|
||
return lookup_iface_entry_I (CLASSED_NODE_IFACES_ENTRIES_LOCKED (node),
|
||
iface_node);
|
||
}
|
||
|
||
|
||
static inline gboolean
|
||
type_lookup_iface_vtable_I (TypeNode *node,
|
||
TypeNode *iface_node,
|
||
gpointer *vtable_ptr)
|
||
{
|
||
IFaceEntry *entry;
|
||
gboolean res;
|
||
|
||
if (!NODE_IS_IFACE (iface_node))
|
||
{
|
||
if (vtable_ptr)
|
||
*vtable_ptr = NULL;
|
||
return FALSE;
|
||
}
|
||
|
||
G_ATOMIC_ARRAY_DO_TRANSACTION
|
||
(CLASSED_NODE_IFACES_ENTRIES (node), IFaceEntries,
|
||
|
||
entry = lookup_iface_entry_I (transaction_data, iface_node);
|
||
res = entry != NULL;
|
||
if (vtable_ptr)
|
||
{
|
||
if (entry)
|
||
*vtable_ptr = entry->vtable;
|
||
else
|
||
*vtable_ptr = NULL;
|
||
}
|
||
);
|
||
|
||
return res;
|
||
}
|
||
|
||
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 const 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) || is_interface) &&
|
||
(info->class_init || info->class_finalize || info->class_data ||
|
||
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;
|
||
}
|
||
if (node->data && node->data->class.class)
|
||
{
|
||
g_warning ("attempting to add an interface (%s) to class (%s) after class_init",
|
||
NODE_NAME (iface), 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 initialized, 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, NULL, NULL, NULL, NULL, NULL, NULL, 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) /* careful, is_instantiatable is also is_classed */
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
|
||
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.init_state = UNINITIALIZED;
|
||
data->instance.instance_size = info->instance_size;
|
||
/* We'll set the final value for data->instance.private size
|
||
* after the parent class has been initialized
|
||
*/
|
||
data->instance.private_size = 0;
|
||
data->instance.class_private_size = 0;
|
||
if (pnode)
|
||
data->instance.class_private_size = pnode->data->instance.class_private_size;
|
||
data->instance.n_preallocs = MIN (info->n_preallocs, 1024);
|
||
data->instance.instance_init = info->instance_init;
|
||
}
|
||
else if (node->is_classed) /* only classed */
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
|
||
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;
|
||
data->class.class_private_size = 0;
|
||
if (pnode)
|
||
data->class.class_private_size = pnode->data->class.class_private_size;
|
||
data->class.init_state = UNINITIALIZED;
|
||
}
|
||
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;
|
||
data->iface.dflt_init = info->class_init;
|
||
data->iface.dflt_finalize = info->class_finalize;
|
||
data->iface.dflt_data = info->class_data;
|
||
data->iface.dflt_vtable = NULL;
|
||
}
|
||
else if (NODE_IS_BOXED (node))
|
||
{
|
||
data = g_malloc0 (sizeof (BoxedData) + vtable_size);
|
||
if (vtable_size)
|
||
vtable = G_STRUCT_MEMBER_P (data, sizeof (BoxedData));
|
||
}
|
||
else
|
||
{
|
||
data = g_malloc0 (sizeof (CommonData) + vtable_size);
|
||
if (vtable_size)
|
||
vtable = G_STRUCT_MEMBER_P (data, sizeof (CommonData));
|
||
}
|
||
|
||
node->data = data;
|
||
|
||
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 */
|
||
|
||
g_atomic_int_set ((int *) &node->ref_count, 1);
|
||
}
|
||
|
||
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_REFCOUNT (node) > 0);
|
||
|
||
g_atomic_int_inc ((int *) &node->ref_count);
|
||
}
|
||
}
|
||
|
||
static inline gboolean
|
||
type_data_ref_U (TypeNode *node)
|
||
{
|
||
guint current;
|
||
|
||
do {
|
||
current = NODE_REFCOUNT (node);
|
||
|
||
if (current < 1)
|
||
return FALSE;
|
||
} while (!g_atomic_int_compare_and_exchange ((int *) &node->ref_count, current, current + 1));
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static gboolean
|
||
iface_node_has_available_offset_L (TypeNode *iface_node,
|
||
gsize offset,
|
||
int for_index)
|
||
{
|
||
guint8 *offsets;
|
||
|
||
offsets = G_ATOMIC_ARRAY_GET_LOCKED (&iface_node->_prot.offsets, guint8);
|
||
if (offsets == NULL)
|
||
return TRUE;
|
||
|
||
if (G_ATOMIC_ARRAY_DATA_SIZE (offsets) <= offset)
|
||
return TRUE;
|
||
|
||
if (offsets[offset] == 0 ||
|
||
offsets[offset] == for_index+1)
|
||
return TRUE;
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gsize
|
||
find_free_iface_offset_L (IFaceEntries *entries)
|
||
{
|
||
IFaceEntry *entry;
|
||
TypeNode *iface_node;
|
||
gsize offset;
|
||
int i;
|
||
int n_entries;
|
||
|
||
n_entries = IFACE_ENTRIES_N_ENTRIES (entries);
|
||
offset = 0;
|
||
do
|
||
{
|
||
for (i = 0; i < n_entries; i++)
|
||
{
|
||
entry = &entries->entry[i];
|
||
iface_node = lookup_type_node_I (entry->iface_type);
|
||
|
||
if (!iface_node_has_available_offset_L (iface_node, offset, i))
|
||
{
|
||
offset++;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
while (i != n_entries);
|
||
|
||
return offset;
|
||
}
|
||
|
||
static void
|
||
iface_node_set_offset_L (TypeNode *iface_node,
|
||
gsize offset,
|
||
int index)
|
||
{
|
||
guint8 *offsets, *old_offsets;
|
||
gsize new_size, old_size;
|
||
gsize i;
|
||
|
||
old_offsets = G_ATOMIC_ARRAY_GET_LOCKED (&iface_node->_prot.offsets, guint8);
|
||
if (old_offsets == NULL)
|
||
old_size = 0;
|
||
else
|
||
{
|
||
old_size = G_ATOMIC_ARRAY_DATA_SIZE (old_offsets);
|
||
if (offset < old_size &&
|
||
old_offsets[offset] == index + 1)
|
||
return; /* Already set to this index, return */
|
||
}
|
||
new_size = MAX (old_size, offset + 1);
|
||
|
||
offsets = _g_atomic_array_copy (&iface_node->_prot.offsets,
|
||
0, new_size - old_size);
|
||
|
||
/* Mark new area as unused */
|
||
for (i = old_size; i < new_size; i++)
|
||
offsets[i] = 0;
|
||
|
||
offsets[offset] = index + 1;
|
||
|
||
_g_atomic_array_update (&iface_node->_prot.offsets, offsets);
|
||
}
|
||
|
||
static void
|
||
type_node_add_iface_entry_W (TypeNode *node,
|
||
GType iface_type,
|
||
IFaceEntry *parent_entry)
|
||
{
|
||
IFaceEntries *entries;
|
||
IFaceEntry *entry;
|
||
TypeNode *iface_node;
|
||
guint i, j;
|
||
guint num_entries;
|
||
|
||
g_assert (node->is_instantiatable);
|
||
|
||
entries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (node);
|
||
if (entries != NULL)
|
||
{
|
||
num_entries = IFACE_ENTRIES_N_ENTRIES (entries);
|
||
|
||
g_assert (num_entries < MAX_N_INTERFACES);
|
||
|
||
for (i = 0; i < num_entries; i++)
|
||
{
|
||
entry = &entries->entry[i];
|
||
if (entry->iface_type == iface_type)
|
||
{
|
||
/* this can happen in two cases:
|
||
* - our parent type already conformed to iface_type and node
|
||
* got its own holder info. here, our children already have
|
||
* entries and NULL vtables, since this will only work for
|
||
* uninitialized classes.
|
||
* - an interface type is added to an ancestor after it was
|
||
* added to a child type.
|
||
*/
|
||
if (!parent_entry)
|
||
g_assert (entry->vtable == NULL && entry->init_state == UNINITIALIZED);
|
||
else
|
||
{
|
||
/* sick, interface is added to ancestor *after* child type;
|
||
* nothing todo, the entry and our children were already setup correctly
|
||
*/
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
entries = _g_atomic_array_copy (CLASSED_NODE_IFACES_ENTRIES (node),
|
||
IFACE_ENTRIES_HEADER_SIZE,
|
||
sizeof (IFaceEntry));
|
||
num_entries = IFACE_ENTRIES_N_ENTRIES (entries);
|
||
i = num_entries - 1;
|
||
if (i == 0)
|
||
entries->offset_index = 0;
|
||
entries->entry[i].iface_type = iface_type;
|
||
entries->entry[i].vtable = NULL;
|
||
entries->entry[i].init_state = UNINITIALIZED;
|
||
|
||
if (parent_entry)
|
||
{
|
||
if (node->data && g_atomic_int_get (&node->data->class.init_state) >= BASE_IFACE_INIT)
|
||
{
|
||
entries->entry[i].init_state = INITIALIZED;
|
||
entries->entry[i].vtable = parent_entry->vtable;
|
||
}
|
||
}
|
||
|
||
/* Update offsets in iface */
|
||
iface_node = lookup_type_node_I (iface_type);
|
||
|
||
if (iface_node_has_available_offset_L (iface_node,
|
||
entries->offset_index,
|
||
i))
|
||
{
|
||
iface_node_set_offset_L (iface_node,
|
||
entries->offset_index, i);
|
||
}
|
||
else
|
||
{
|
||
entries->offset_index =
|
||
find_free_iface_offset_L (entries);
|
||
for (j = 0; j < IFACE_ENTRIES_N_ENTRIES (entries); j++)
|
||
{
|
||
entry = &entries->entry[j];
|
||
iface_node =
|
||
lookup_type_node_I (entry->iface_type);
|
||
iface_node_set_offset_L (iface_node,
|
||
entries->offset_index, j);
|
||
}
|
||
}
|
||
|
||
_g_atomic_array_update (CLASSED_NODE_IFACES_ENTRIES (node), entries);
|
||
|
||
if (parent_entry)
|
||
{
|
||
for (i = 0; i < node->n_children; i++)
|
||
type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), iface_type, &entries->entry[i]);
|
||
}
|
||
}
|
||
|
||
static void
|
||
type_add_interface_Wm (TypeNode *node,
|
||
TypeNode *iface,
|
||
const GInterfaceInfo *info,
|
||
GTypePlugin *plugin)
|
||
{
|
||
IFaceHolder *iholder = g_new0 (IFaceHolder, 1);
|
||
IFaceEntry *entry;
|
||
guint i;
|
||
|
||
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_memdup2 (info, sizeof (*info)) : NULL;
|
||
iholder->plugin = plugin;
|
||
|
||
/* create an iface entry for this type */
|
||
type_node_add_iface_entry_W (node, NODE_TYPE (iface), NULL);
|
||
|
||
/* if the class is already (partly) initialized, we may need to base
|
||
* initialize and/or initialize the new interface.
|
||
*/
|
||
if (node->data)
|
||
{
|
||
InitState class_state = g_atomic_int_get (&node->data->class.init_state);
|
||
|
||
if (class_state >= BASE_IFACE_INIT)
|
||
type_iface_vtable_base_init_Wm (iface, node);
|
||
|
||
if (class_state >= IFACE_INIT)
|
||
type_iface_vtable_iface_init_Wm (iface, node);
|
||
}
|
||
|
||
/* create iface entries for children of this type */
|
||
entry = type_lookup_iface_entry_L (node, iface);
|
||
for (i = 0; i < node->n_children; i++)
|
||
type_node_add_iface_entry_W (lookup_type_node_I (node->children[i]), NODE_TYPE (iface), entry);
|
||
}
|
||
|
||
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);
|
||
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);
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_add_prerequisite:
|
||
* @interface_type: #GType value of an interface type
|
||
* @prerequisite_type: #GType value of an interface or instantiatable type
|
||
*
|
||
* Adds @prerequisite_type to the list of prerequisites of @interface_type.
|
||
* This means that any type implementing @interface_type must also implement
|
||
* @prerequisite_type. Prerequisites can be thought of as an alternative to
|
||
* interface derivation (which GType doesn't support). An interface can have
|
||
* at most one instantiatable prerequisite type.
|
||
*/
|
||
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 publicly 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 + 1u; 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 *prerequisites;
|
||
guint i;
|
||
|
||
prerequisites = IFACE_NODE_PREREQUISITES (prerequisite_node);
|
||
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (prerequisite_node); i++)
|
||
type_iface_add_prerequisite_W (iface, lookup_type_node_I (prerequisites[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));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_prerequisites:
|
||
* @interface_type: an interface type
|
||
* @n_prerequisites: (out) (optional): location to return the number
|
||
* of prerequisites, or %NULL
|
||
*
|
||
* Returns the prerequisites of an interfaces type.
|
||
*
|
||
* Since: 2.2
|
||
*
|
||
* Returns: (array length=n_prerequisites) (transfer full): a
|
||
* newly-allocated zero-terminated array of #GType containing
|
||
* the prerequisites of @interface_type
|
||
*/
|
||
GType*
|
||
g_type_interface_prerequisites (GType interface_type,
|
||
guint *n_prerequisites)
|
||
{
|
||
TypeNode *iface;
|
||
|
||
g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), NULL);
|
||
|
||
iface = lookup_type_node_I (interface_type);
|
||
if (iface)
|
||
{
|
||
GType *types;
|
||
TypeNode *inode = NULL;
|
||
guint i, n = 0;
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
types = g_new0 (GType, IFACE_NODE_N_PREREQUISITES (iface) + 1);
|
||
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
|
||
{
|
||
GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
|
||
TypeNode *node = lookup_type_node_I (prerequisite);
|
||
if (node->is_instantiatable)
|
||
{
|
||
if (!inode || type_node_is_a_L (node, inode))
|
||
inode = node;
|
||
}
|
||
else
|
||
types[n++] = NODE_TYPE (node);
|
||
}
|
||
if (inode)
|
||
types[n++] = NODE_TYPE (inode);
|
||
|
||
if (n_prerequisites)
|
||
*n_prerequisites = n;
|
||
G_READ_UNLOCK (&type_rw_lock);
|
||
|
||
return types;
|
||
}
|
||
else
|
||
{
|
||
if (n_prerequisites)
|
||
*n_prerequisites = 0;
|
||
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_instantiatable_prerequisite:
|
||
* @interface_type: an interface type
|
||
*
|
||
* Returns the most specific instantiatable prerequisite of an
|
||
* interface type. If the interface type has no instantiatable
|
||
* prerequisite, %G_TYPE_INVALID is returned.
|
||
*
|
||
* See g_type_interface_add_prerequisite() for more information
|
||
* about prerequisites.
|
||
*
|
||
* Returns: the instantiatable prerequisite type or %G_TYPE_INVALID if none
|
||
*
|
||
* Since: 2.68
|
||
**/
|
||
GType
|
||
g_type_interface_instantiatable_prerequisite (GType interface_type)
|
||
{
|
||
TypeNode *inode = NULL;
|
||
TypeNode *iface;
|
||
guint i;
|
||
|
||
g_return_val_if_fail (G_TYPE_IS_INTERFACE (interface_type), G_TYPE_INVALID);
|
||
|
||
iface = lookup_type_node_I (interface_type);
|
||
if (iface == NULL)
|
||
return G_TYPE_INVALID;
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
|
||
for (i = 0; i < IFACE_NODE_N_PREREQUISITES (iface); i++)
|
||
{
|
||
GType prerequisite = IFACE_NODE_PREREQUISITES (iface)[i];
|
||
TypeNode *node = lookup_type_node_I (prerequisite);
|
||
if (node->is_instantiatable)
|
||
{
|
||
if (!inode || type_node_is_a_L (node, inode))
|
||
inode = node;
|
||
}
|
||
}
|
||
|
||
G_READ_UNLOCK (&type_rw_lock);
|
||
|
||
if (inode)
|
||
return NODE_TYPE (inode);
|
||
else
|
||
return G_TYPE_INVALID;
|
||
}
|
||
|
||
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_memdup2 (&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);
|
||
type_data_unref_U (iface, FALSE);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_type_create_instance: (skip)
|
||
* @type: an instantiatable type to create an instance for
|
||
*
|
||
* Creates and initializes an instance of @type if @type is valid and
|
||
* can be instantiated. The type system only performs basic allocation
|
||
* and structure setups for instances: actual instance creation should
|
||
* happen through functions supplied by the type's fundamental type
|
||
* implementation. So use of g_type_create_instance() is reserved for
|
||
* implementers of fundamental types only. E.g. instances of the
|
||
* #GObject hierarchy should be created via g_object_new() and never
|
||
* directly through g_type_create_instance() which doesn't handle things
|
||
* like singleton objects or object construction.
|
||
*
|
||
* The extended members of the returned instance are guaranteed to be filled
|
||
* with zeros.
|
||
*
|
||
* Note: Do not use this function, unless you're implementing a
|
||
* fundamental type. Also language bindings should not use this
|
||
* function, but g_object_new() instead.
|
||
*
|
||
* Returns: an allocated and initialized instance, subject to further
|
||
* treatment by the fundamental type implementation
|
||
*/
|
||
GTypeInstance*
|
||
g_type_create_instance (GType type)
|
||
{
|
||
TypeNode *node;
|
||
GTypeInstance *instance;
|
||
GTypeClass *class;
|
||
gchar *allocated;
|
||
gint private_size;
|
||
gint ivar_size;
|
||
guint i;
|
||
|
||
node = lookup_type_node_I (type);
|
||
if (!node || !node->is_instantiatable)
|
||
{
|
||
g_error ("cannot create new instance of invalid (non-instantiatable) type '%s'",
|
||
type_descriptive_name_I (type));
|
||
}
|
||
/* G_TYPE_IS_ABSTRACT() is an external call: _U */
|
||
if (!node->mutatable_check_cache && G_TYPE_IS_ABSTRACT (type))
|
||
{
|
||
g_error ("cannot create instance of abstract (non-instantiatable) type '%s'",
|
||
type_descriptive_name_I (type));
|
||
}
|
||
|
||
class = g_type_class_ref (type);
|
||
|
||
/* We allocate the 'private' areas before the normal instance data, in
|
||
* reverse order. This allows the private area of a particular class
|
||
* to always be at a constant relative address to the instance data.
|
||
* If we stored the private data after the instance data this would
|
||
* not be the case (since a subclass that added more instance
|
||
* variables would push the private data further along).
|
||
*
|
||
* This presents problems for valgrindability, of course, so we do a
|
||
* workaround for that case. We identify the start of the object to
|
||
* valgrind as an allocated block (so that pointers to objects show up
|
||
* as 'reachable' instead of 'possibly lost'). We then add an extra
|
||
* pointer at the end of the object, after all instance data, back to
|
||
* the start of the private area so that it is also recorded as
|
||
* reachable. We also add extra private space at the start because
|
||
* valgrind doesn't seem to like us claiming to have allocated an
|
||
* address that it saw allocated by malloc().
|
||
*/
|
||
private_size = node->data->instance.private_size;
|
||
ivar_size = node->data->instance.instance_size;
|
||
|
||
#ifdef ENABLE_VALGRIND
|
||
if (private_size && RUNNING_ON_VALGRIND)
|
||
{
|
||
private_size += ALIGN_STRUCT (1);
|
||
|
||
/* Allocate one extra pointer size... */
|
||
allocated = g_slice_alloc0 (private_size + ivar_size + sizeof (gpointer));
|
||
/* ... and point it back to the start of the private data. */
|
||
*(gpointer *) (allocated + private_size + ivar_size) = allocated + ALIGN_STRUCT (1);
|
||
|
||
/* Tell valgrind that it should treat the object itself as such */
|
||
VALGRIND_MALLOCLIKE_BLOCK (allocated + private_size, ivar_size + sizeof (gpointer), 0, TRUE);
|
||
VALGRIND_MALLOCLIKE_BLOCK (allocated + ALIGN_STRUCT (1), private_size - ALIGN_STRUCT (1), 0, TRUE);
|
||
}
|
||
else
|
||
#endif
|
||
allocated = g_slice_alloc0 (private_size + ivar_size);
|
||
|
||
instance = (GTypeInstance *) (allocated + private_size);
|
||
|
||
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);
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
IF_DEBUG (INSTANCE_COUNT)
|
||
{
|
||
g_atomic_int_inc ((int *) &node->instance_count);
|
||
}
|
||
#endif
|
||
|
||
TRACE(GOBJECT_OBJECT_NEW(instance, type));
|
||
|
||
return instance;
|
||
}
|
||
|
||
/**
|
||
* g_type_free_instance:
|
||
* @instance: an instance of a type
|
||
*
|
||
* Frees an instance of a type, returning it to the instance pool for
|
||
* the type, if there is one.
|
||
*
|
||
* Like g_type_create_instance(), this function is reserved for
|
||
* implementors of fundamental types.
|
||
*/
|
||
void
|
||
g_type_free_instance (GTypeInstance *instance)
|
||
{
|
||
TypeNode *node;
|
||
GTypeClass *class;
|
||
gchar *allocated;
|
||
gint private_size;
|
||
gint ivar_size;
|
||
|
||
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;
|
||
private_size = node->data->instance.private_size;
|
||
ivar_size = node->data->instance.instance_size;
|
||
allocated = ((gchar *) instance) - private_size;
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
memset (allocated, 0xaa, ivar_size + private_size);
|
||
#endif
|
||
|
||
#ifdef ENABLE_VALGRIND
|
||
/* See comment in g_type_create_instance() about what's going on here.
|
||
* We're basically unwinding what we put into motion there.
|
||
*/
|
||
if (private_size && RUNNING_ON_VALGRIND)
|
||
{
|
||
private_size += ALIGN_STRUCT (1);
|
||
allocated -= ALIGN_STRUCT (1);
|
||
|
||
/* Clear out the extra pointer... */
|
||
*(gpointer *) (allocated + private_size + ivar_size) = NULL;
|
||
/* ... and ensure we include it in the size we free. */
|
||
g_slice_free1 (private_size + ivar_size + sizeof (gpointer), allocated);
|
||
|
||
VALGRIND_FREELIKE_BLOCK (allocated + ALIGN_STRUCT (1), 0);
|
||
VALGRIND_FREELIKE_BLOCK (instance, 0);
|
||
}
|
||
else
|
||
#endif
|
||
g_slice_free1 (private_size + ivar_size, allocated);
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
IF_DEBUG (INSTANCE_COUNT)
|
||
{
|
||
g_atomic_int_add ((int *) &node->instance_count, -1);
|
||
}
|
||
#endif
|
||
|
||
g_type_class_unref (class);
|
||
}
|
||
|
||
static void
|
||
type_iface_ensure_dflt_vtable_Wm (TypeNode *iface)
|
||
{
|
||
g_assert (iface->data);
|
||
|
||
if (!iface->data->iface.dflt_vtable)
|
||
{
|
||
GTypeInterface *vtable = g_malloc0 (iface->data->iface.vtable_size);
|
||
iface->data->iface.dflt_vtable = vtable;
|
||
vtable->g_type = NODE_TYPE (iface);
|
||
vtable->g_instance_type = 0;
|
||
if (iface->data->iface.vtable_init_base ||
|
||
iface->data->iface.dflt_init)
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
if (iface->data->iface.vtable_init_base)
|
||
iface->data->iface.vtable_init_base (vtable);
|
||
if (iface->data->iface.dflt_init)
|
||
iface->data->iface.dflt_init (vtable, (gpointer) iface->data->iface.dflt_data);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* This is called to allocate and do the first part of initializing
|
||
* the interface vtable; type_iface_vtable_iface_init_Wm() does the remainder.
|
||
*
|
||
* A FALSE return indicates that we didn't find an init function for
|
||
* this type/iface pair, so the vtable from the parent type should
|
||
* be used. Note that the write lock is not modified upon a FALSE
|
||
* return.
|
||
*/
|
||
static gboolean
|
||
type_iface_vtable_base_init_Wm (TypeNode *iface,
|
||
TypeNode *node)
|
||
{
|
||
IFaceEntry *entry;
|
||
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 */
|
||
|
||
type_iface_ensure_dflt_vtable_Wm (iface);
|
||
|
||
entry = type_lookup_iface_entry_L (node, iface);
|
||
|
||
g_assert (iface->data && entry && entry->vtable == NULL && iholder && iholder->info);
|
||
|
||
entry->init_state = IFACE_INIT;
|
||
|
||
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_memdup2 (pentry->vtable, iface->data->iface.vtable_size);
|
||
}
|
||
if (!vtable)
|
||
vtable = g_memdup2 (iface->data->iface.dflt_vtable, 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)
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
iface->data->iface.vtable_init_base (vtable);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
return TRUE; /* initialized the vtable */
|
||
}
|
||
|
||
/* Finishes what type_iface_vtable_base_init_Wm started by
|
||
* calling the interface init function.
|
||
* this function may only be called for types with their
|
||
* own interface holder info, i.e. types for which
|
||
* g_type_add_interface*() was called and not children thereof.
|
||
*/
|
||
static void
|
||
type_iface_vtable_iface_init_Wm (TypeNode *iface,
|
||
TypeNode *node)
|
||
{
|
||
IFaceEntry *entry = type_lookup_iface_entry_L (node, iface);
|
||
IFaceHolder *iholder = type_iface_peek_holder_L (iface, NODE_TYPE (node));
|
||
GTypeInterface *vtable = NULL;
|
||
guint i;
|
||
|
||
/* iholder->info should have been filled in by type_iface_vtable_base_init_Wm() */
|
||
g_assert (iface->data && entry && iholder && iholder->info);
|
||
g_assert (entry->init_state == IFACE_INIT); /* assert prior base_init() */
|
||
|
||
entry->init_state = INITIALIZED;
|
||
|
||
vtable = entry->vtable;
|
||
|
||
if (iholder->info->interface_init)
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
if (iholder->info->interface_init)
|
||
iholder->info->interface_init (vtable, iholder->info->interface_data);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
|
||
for (i = 0; i < static_n_iface_check_funcs; i++)
|
||
{
|
||
GTypeInterfaceCheckFunc check_func = static_iface_check_funcs[i].check_func;
|
||
gpointer check_data = static_iface_check_funcs[i].check_data;
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
check_func (check_data, (gpointer)vtable);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
}
|
||
|
||
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;
|
||
entry->init_state = UNINITIALIZED;
|
||
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;
|
||
IFaceEntries *entries;
|
||
IFaceEntry *entry;
|
||
TypeNode *bnode, *pnode;
|
||
guint i;
|
||
|
||
/* Accessing data->class will work for instantiatable types
|
||
* too because ClassData is a subset of InstanceData
|
||
*/
|
||
g_assert (node->is_classed && node->data &&
|
||
node->data->class.class_size &&
|
||
!node->data->class.class &&
|
||
g_atomic_int_get (&node->data->class.init_state) == UNINITIALIZED);
|
||
if (node->data->class.class_private_size)
|
||
class = g_malloc0 (ALIGN_STRUCT (node->data->class.class_size) + node->data->class.class_private_size);
|
||
else
|
||
class = g_malloc0 (node->data->class.class_size);
|
||
node->data->class.class = class;
|
||
g_atomic_int_set (&node->data->class.init_state, BASE_CLASS_INIT);
|
||
|
||
if (pclass)
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (pclass->g_type);
|
||
|
||
memcpy (class, pclass, pnode->data->class.class_size);
|
||
memcpy (G_STRUCT_MEMBER_P (class, ALIGN_STRUCT (node->data->class.class_size)), G_STRUCT_MEMBER_P (pclass, ALIGN_STRUCT (pnode->data->class.class_size)), pnode->data->class.class_private_size);
|
||
|
||
if (node->is_instantiatable)
|
||
{
|
||
/* We need to initialize the private_size here rather than in
|
||
* type_data_make_W() since the class init for the parent
|
||
* class may have changed pnode->data->instance.private_size.
|
||
*/
|
||
node->data->instance.private_size = pnode->data->instance.private_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);
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
g_atomic_int_set (&node->data->class.init_state, BASE_IFACE_INIT);
|
||
|
||
/* Before we initialize the class, base initialize all interfaces, either
|
||
* from parent, or through our holder info
|
||
*/
|
||
pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
|
||
i = 0;
|
||
while ((entries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (node)) != NULL &&
|
||
i < IFACE_ENTRIES_N_ENTRIES (entries))
|
||
{
|
||
entry = &entries->entry[i];
|
||
while (i < IFACE_ENTRIES_N_ENTRIES (entries) &&
|
||
entry->init_state == IFACE_INIT)
|
||
{
|
||
entry++;
|
||
i++;
|
||
}
|
||
|
||
if (i == IFACE_ENTRIES_N_ENTRIES (entries))
|
||
break;
|
||
|
||
if (!type_iface_vtable_base_init_Wm (lookup_type_node_I (entry->iface_type), node))
|
||
{
|
||
guint j;
|
||
IFaceEntries *pentries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (pnode);
|
||
|
||
/* need to get this interface from parent, type_iface_vtable_base_init_Wm()
|
||
* doesn't modify write lock upon FALSE, so entry is still valid;
|
||
*/
|
||
g_assert (pnode != NULL);
|
||
|
||
if (pentries)
|
||
for (j = 0; j < IFACE_ENTRIES_N_ENTRIES (pentries); j++)
|
||
{
|
||
IFaceEntry *pentry = &pentries->entry[j];
|
||
|
||
if (pentry->iface_type == entry->iface_type)
|
||
{
|
||
entry->vtable = pentry->vtable;
|
||
entry->init_state = INITIALIZED;
|
||
break;
|
||
}
|
||
}
|
||
g_assert (entry->vtable != NULL);
|
||
}
|
||
|
||
/* If the write lock was released, additional interface entries might
|
||
* have been inserted into CLASSED_NODE_IFACES_ENTRIES (node); they'll
|
||
* be base-initialized when inserted, so we don't have to worry that
|
||
* we might miss them. Uninitialized entries can only be moved higher
|
||
* when new ones are inserted.
|
||
*/
|
||
i++;
|
||
}
|
||
|
||
g_atomic_int_set (&node->data->class.init_state, CLASS_INIT);
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
|
||
if (node->data->class.class_init)
|
||
node->data->class.class_init (class, (gpointer) node->data->class.class_data);
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
g_atomic_int_set (&node->data->class.init_state, IFACE_INIT);
|
||
|
||
/* finish initializing the interfaces through our holder info.
|
||
* inherited interfaces are already init_state == INITIALIZED, because
|
||
* they either got setup in the above base_init loop, or during
|
||
* class_init from within type_add_interface_Wm() for this or
|
||
* an ancestor type.
|
||
*/
|
||
i = 0;
|
||
while ((entries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (node)) != NULL)
|
||
{
|
||
entry = &entries->entry[i];
|
||
while (i < IFACE_ENTRIES_N_ENTRIES (entries) &&
|
||
entry->init_state == INITIALIZED)
|
||
{
|
||
entry++;
|
||
i++;
|
||
}
|
||
|
||
if (i == IFACE_ENTRIES_N_ENTRIES (entries))
|
||
break;
|
||
|
||
type_iface_vtable_iface_init_Wm (lookup_type_node_I (entry->iface_type), node);
|
||
|
||
/* As in the loop above, additional initialized entries might be inserted
|
||
* if the write lock is released, but that's harmless because the entries
|
||
* we need to initialize only move higher in the list.
|
||
*/
|
||
i++;
|
||
}
|
||
|
||
g_atomic_int_set (&node->data->class.init_state, INITIALIZED);
|
||
}
|
||
|
||
static void
|
||
type_data_finalize_class_ifaces_Wm (TypeNode *node)
|
||
{
|
||
guint i;
|
||
IFaceEntries *entries;
|
||
|
||
g_assert (node->is_instantiatable && node->data && node->data->class.class && NODE_REFCOUNT (node) == 0);
|
||
|
||
reiterate:
|
||
entries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (node);
|
||
for (i = 0; entries != NULL && i < IFACE_ENTRIES_N_ENTRIES (entries); i++)
|
||
{
|
||
IFaceEntry *entry = &entries->entry[i];
|
||
if (entry->vtable)
|
||
{
|
||
if (type_iface_vtable_finalize_Wm (lookup_type_node_I (entry->iface_type), node, entry->vtable))
|
||
{
|
||
/* refetch entries, IFACES_ENTRIES might be modified */
|
||
goto reiterate;
|
||
}
|
||
else
|
||
{
|
||
/* type_iface_vtable_finalize_Wm() doesn't modify write lock upon FALSE,
|
||
* iface vtable came from parent
|
||
*/
|
||
entry->vtable = NULL;
|
||
entry->init_state = UNINITIALIZED;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
type_data_finalize_class_U (TypeNode *node,
|
||
ClassData *cdata)
|
||
{
|
||
GTypeClass *class = cdata->class;
|
||
TypeNode *bnode;
|
||
|
||
g_assert (cdata->class && NODE_REFCOUNT (node) == 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);
|
||
|
||
g_free (cdata->class);
|
||
}
|
||
|
||
static void
|
||
type_data_last_unref_Wm (TypeNode *node,
|
||
gboolean uncached)
|
||
{
|
||
g_return_if_fail (node != NULL && node->plugin != NULL);
|
||
|
||
if (!node->data || NODE_REFCOUNT (node) == 0)
|
||
{
|
||
g_warning ("cannot drop last reference to unreferenced type '%s'",
|
||
NODE_NAME (node));
|
||
return;
|
||
}
|
||
|
||
/* call class cache hooks */
|
||
if (node->is_classed && node->data && node->data->class.class && static_n_class_cache_funcs && !uncached)
|
||
{
|
||
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_REFCOUNT (node) == 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);
|
||
}
|
||
|
||
/* may have been re-referenced meanwhile */
|
||
if (g_atomic_int_dec_and_test ((int *) &node->ref_count))
|
||
{
|
||
GType ptype = NODE_PARENT_TYPE (node);
|
||
TypeData *tdata;
|
||
|
||
if (node->is_instantiatable)
|
||
{
|
||
/* destroy node->data->instance.mem_chunk */
|
||
}
|
||
|
||
tdata = node->data;
|
||
if (node->is_classed && tdata->class.class)
|
||
{
|
||
if (CLASSED_NODE_IFACES_ENTRIES_LOCKED (node) != NULL)
|
||
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 if (NODE_IS_IFACE (node) && tdata->iface.dflt_vtable)
|
||
{
|
||
node->mutatable_check_cache = FALSE;
|
||
node->data = NULL;
|
||
if (tdata->iface.dflt_finalize || tdata->iface.vtable_finalize_base)
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
if (tdata->iface.dflt_finalize)
|
||
tdata->iface.dflt_finalize (tdata->iface.dflt_vtable, (gpointer) tdata->iface.dflt_data);
|
||
if (tdata->iface.vtable_finalize_base)
|
||
tdata->iface.vtable_finalize_base (tdata->iface.dflt_vtable);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
g_free (tdata->iface.dflt_vtable);
|
||
}
|
||
else
|
||
{
|
||
node->mutatable_check_cache = FALSE;
|
||
node->data = NULL;
|
||
}
|
||
|
||
/* freeing tdata->common.value_table and its contents is taken care of
|
||
* by allocating it in one chunk with tdata
|
||
*/
|
||
g_free (tdata);
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_type_plugin_unuse (node->plugin);
|
||
if (ptype)
|
||
type_data_unref_U (lookup_type_node_I (ptype), FALSE);
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
type_data_unref_U (TypeNode *node,
|
||
gboolean uncached)
|
||
{
|
||
guint current;
|
||
|
||
do {
|
||
current = NODE_REFCOUNT (node);
|
||
|
||
if (current <= 1)
|
||
{
|
||
if (!node->plugin)
|
||
{
|
||
g_warning ("static type '%s' unreferenced too often",
|
||
NODE_NAME (node));
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
/* This is the last reference of a type from a plugin. We are
|
||
* experimentally disabling support for unloading type
|
||
* plugins, so don't allow the last ref to drop.
|
||
*/
|
||
return;
|
||
}
|
||
|
||
g_assert (current > 0);
|
||
|
||
g_rec_mutex_lock (&class_init_rec_mutex); /* required locking order: 1) class_init_rec_mutex, 2) type_rw_lock */
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
type_data_last_unref_Wm (node, uncached);
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_rec_mutex_unlock (&class_init_rec_mutex);
|
||
return;
|
||
}
|
||
} while (!g_atomic_int_compare_and_exchange ((int *) &node->ref_count, current, current - 1));
|
||
}
|
||
|
||
/**
|
||
* g_type_add_class_cache_func: (skip)
|
||
* @cache_data: data to be passed to @cache_func
|
||
* @cache_func: a #GTypeClassCacheFunc
|
||
*
|
||
* Adds a #GTypeClassCacheFunc to be called before the reference count of a
|
||
* class goes from one to zero. This can be used to prevent premature class
|
||
* destruction. All installed #GTypeClassCacheFunc functions will be chained
|
||
* until one of them returns %TRUE. The functions have to check the class id
|
||
* passed in to figure whether they actually want to cache the class of this
|
||
* type, since all classes are routed through the same #GTypeClassCacheFunc
|
||
* chain.
|
||
*/
|
||
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);
|
||
}
|
||
|
||
/**
|
||
* g_type_remove_class_cache_func: (skip)
|
||
* @cache_data: data that was given when adding @cache_func
|
||
* @cache_func: a #GTypeClassCacheFunc
|
||
*
|
||
* Removes a previously installed #GTypeClassCacheFunc. The cache
|
||
* maintained by @cache_func has to be empty when calling
|
||
* g_type_remove_class_cache_func() to avoid leaks.
|
||
*/
|
||
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--;
|
||
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);
|
||
}
|
||
|
||
|
||
/**
|
||
* g_type_add_interface_check: (skip)
|
||
* @check_data: data to pass to @check_func
|
||
* @check_func: function to be called after each interface
|
||
* is initialized
|
||
*
|
||
* Adds a function to be called after an interface vtable is
|
||
* initialized for any class (i.e. after the @interface_init
|
||
* member of #GInterfaceInfo has been called).
|
||
*
|
||
* This function is useful when you want to check an invariant
|
||
* that depends on the interfaces of a class. For instance, the
|
||
* implementation of #GObject uses this facility to check that an
|
||
* object implements all of the properties that are defined on its
|
||
* interfaces.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
void
|
||
g_type_add_interface_check (gpointer check_data,
|
||
GTypeInterfaceCheckFunc check_func)
|
||
{
|
||
guint i;
|
||
|
||
g_return_if_fail (check_func != NULL);
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
i = static_n_iface_check_funcs++;
|
||
static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
|
||
static_iface_check_funcs[i].check_data = check_data;
|
||
static_iface_check_funcs[i].check_func = check_func;
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
}
|
||
|
||
/**
|
||
* g_type_remove_interface_check: (skip)
|
||
* @check_data: callback data passed to g_type_add_interface_check()
|
||
* @check_func: callback function passed to g_type_add_interface_check()
|
||
*
|
||
* Removes an interface check function added with
|
||
* g_type_add_interface_check().
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
void
|
||
g_type_remove_interface_check (gpointer check_data,
|
||
GTypeInterfaceCheckFunc check_func)
|
||
{
|
||
gboolean found_it = FALSE;
|
||
guint i;
|
||
|
||
g_return_if_fail (check_func != NULL);
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
for (i = 0; i < static_n_iface_check_funcs; i++)
|
||
if (static_iface_check_funcs[i].check_data == check_data &&
|
||
static_iface_check_funcs[i].check_func == check_func)
|
||
{
|
||
static_n_iface_check_funcs--;
|
||
memmove (static_iface_check_funcs + i,
|
||
static_iface_check_funcs + i + 1,
|
||
sizeof (static_iface_check_funcs[0]) * (static_n_iface_check_funcs - i));
|
||
static_iface_check_funcs = g_renew (IFaceCheckFunc, static_iface_check_funcs, static_n_iface_check_funcs);
|
||
found_it = TRUE;
|
||
break;
|
||
}
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
|
||
if (!found_it)
|
||
g_warning (G_STRLOC ": cannot remove unregistered class check func %p with data %p",
|
||
check_func, check_data);
|
||
}
|
||
|
||
/* --- type registration --- */
|
||
/**
|
||
* g_type_register_fundamental:
|
||
* @type_id: a predefined type identifier
|
||
* @type_name: 0-terminated string used as the name of the new type
|
||
* @info: #GTypeInfo structure for this type
|
||
* @finfo: #GTypeFundamentalInfo structure for this type
|
||
* @flags: bitwise combination of #GTypeFlags values
|
||
*
|
||
* Registers @type_id as the predefined identifier and @type_name as the
|
||
* name of a fundamental type. If @type_id is already registered, or a
|
||
* type named @type_name is already registered, the behaviour is undefined.
|
||
* The type system uses the information contained in the #GTypeInfo structure
|
||
* pointed to by @info and the #GTypeFundamentalInfo structure pointed to by
|
||
* @finfo to manage the type and its instances. The value of @flags determines
|
||
* additional characteristics of the fundamental type.
|
||
*
|
||
* Returns: the predefined type identifier
|
||
*/
|
||
GType
|
||
g_type_register_fundamental (GType type_id,
|
||
const gchar *type_name,
|
||
const GTypeInfo *info,
|
||
const GTypeFundamentalInfo *finfo,
|
||
GTypeFlags flags)
|
||
{
|
||
TypeNode *node;
|
||
|
||
g_assert_type_system_initialized ();
|
||
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 (%" G_GSIZE_FORMAT ")",
|
||
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);
|
||
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);
|
||
}
|
||
|
||
/**
|
||
* g_type_register_static_simple: (skip)
|
||
* @parent_type: type from which this type will be derived
|
||
* @type_name: 0-terminated string used as the name of the new type
|
||
* @class_size: size of the class structure (see #GTypeInfo)
|
||
* @class_init: location of the class initialization function (see #GTypeInfo)
|
||
* @instance_size: size of the instance structure (see #GTypeInfo)
|
||
* @instance_init: location of the instance initialization function (see #GTypeInfo)
|
||
* @flags: bitwise combination of #GTypeFlags values
|
||
*
|
||
* Registers @type_name as the name of a new static type derived from
|
||
* @parent_type. The value of @flags determines the nature (e.g.
|
||
* abstract or not) of the type. It works by filling a #GTypeInfo
|
||
* struct and calling g_type_register_static().
|
||
*
|
||
* Since: 2.12
|
||
*
|
||
* Returns: the new type identifier
|
||
*/
|
||
GType
|
||
g_type_register_static_simple (GType parent_type,
|
||
const gchar *type_name,
|
||
guint class_size,
|
||
GClassInitFunc class_init,
|
||
guint instance_size,
|
||
GInstanceInitFunc instance_init,
|
||
GTypeFlags flags)
|
||
{
|
||
GTypeInfo info;
|
||
|
||
/* Instances are not allowed to be larger than this. If you have a big
|
||
* fixed-length array or something, point to it instead.
|
||
*/
|
||
g_return_val_if_fail (class_size <= G_MAXUINT16, G_TYPE_INVALID);
|
||
g_return_val_if_fail (instance_size <= G_MAXUINT16, G_TYPE_INVALID);
|
||
|
||
info.class_size = class_size;
|
||
info.base_init = NULL;
|
||
info.base_finalize = NULL;
|
||
info.class_init = class_init;
|
||
info.class_finalize = NULL;
|
||
info.class_data = NULL;
|
||
info.instance_size = instance_size;
|
||
info.n_preallocs = 0;
|
||
info.instance_init = instance_init;
|
||
info.value_table = NULL;
|
||
|
||
return g_type_register_static (parent_type, type_name, &info, flags);
|
||
}
|
||
|
||
/**
|
||
* g_type_register_static:
|
||
* @parent_type: type from which this type will be derived
|
||
* @type_name: 0-terminated string used as the name of the new type
|
||
* @info: #GTypeInfo structure for this type
|
||
* @flags: bitwise combination of #GTypeFlags values
|
||
*
|
||
* Registers @type_name as the name of a new static type derived from
|
||
* @parent_type. The type system uses the information contained in the
|
||
* #GTypeInfo structure pointed to by @info to manage the type and its
|
||
* instances (if not abstract). The value of @flags determines the nature
|
||
* (e.g. abstract or not) of the type.
|
||
*
|
||
* Returns: the new type identifier
|
||
*/
|
||
GType
|
||
g_type_register_static (GType parent_type,
|
||
const gchar *type_name,
|
||
const GTypeInfo *info,
|
||
GTypeFlags flags)
|
||
{
|
||
TypeNode *pnode, *node;
|
||
GType type = 0;
|
||
|
||
g_assert_type_system_initialized ();
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_register_dynamic:
|
||
* @parent_type: type from which this type will be derived
|
||
* @type_name: 0-terminated string used as the name of the new type
|
||
* @plugin: #GTypePlugin structure to retrieve the #GTypeInfo from
|
||
* @flags: bitwise combination of #GTypeFlags values
|
||
*
|
||
* Registers @type_name as the name of a new dynamic type derived from
|
||
* @parent_type. The type system uses the information contained in the
|
||
* #GTypePlugin structure pointed to by @plugin to manage the type and its
|
||
* instances (if not abstract). The value of @flags determines the nature
|
||
* (e.g. abstract or not) of the type.
|
||
*
|
||
* Returns: the new type identifier or #G_TYPE_INVALID if registration failed
|
||
*/
|
||
GType
|
||
g_type_register_dynamic (GType parent_type,
|
||
const gchar *type_name,
|
||
GTypePlugin *plugin,
|
||
GTypeFlags flags)
|
||
{
|
||
TypeNode *pnode, *node;
|
||
GType type;
|
||
|
||
g_assert_type_system_initialized ();
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_add_interface_static:
|
||
* @instance_type: #GType value of an instantiatable type
|
||
* @interface_type: #GType value of an interface type
|
||
* @info: #GInterfaceInfo structure for this
|
||
* (@instance_type, @interface_type) combination
|
||
*
|
||
* Adds @interface_type to the static @instance_type.
|
||
* The information contained in the #GInterfaceInfo structure
|
||
* pointed to by @info is used to manage the relationship.
|
||
*/
|
||
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);
|
||
|
||
/* we only need to lock class_init_rec_mutex if instance_type already has its
|
||
* class initialized, however this function is rarely enough called to take
|
||
* the simple route and always acquire class_init_rec_mutex.
|
||
*/
|
||
g_rec_mutex_lock (&class_init_rec_mutex); /* required locking order: 1) class_init_rec_mutex, 2) type_rw_lock */
|
||
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_Wm (node, iface, info, NULL);
|
||
}
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_rec_mutex_unlock (&class_init_rec_mutex);
|
||
}
|
||
|
||
/**
|
||
* g_type_add_interface_dynamic:
|
||
* @instance_type: #GType value of an instantiatable type
|
||
* @interface_type: #GType value of an interface type
|
||
* @plugin: #GTypePlugin structure to retrieve the #GInterfaceInfo from
|
||
*
|
||
* Adds @interface_type to the dynamic @instance_type. The information
|
||
* contained in the #GTypePlugin structure pointed to by @plugin
|
||
* is used to manage the relationship.
|
||
*/
|
||
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;
|
||
|
||
/* see comment in g_type_add_interface_static() about class_init_rec_mutex */
|
||
g_rec_mutex_lock (&class_init_rec_mutex); /* required locking order: 1) class_init_rec_mutex, 2) type_rw_lock */
|
||
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_Wm (node, iface, NULL, plugin);
|
||
}
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_rec_mutex_unlock (&class_init_rec_mutex);
|
||
}
|
||
|
||
|
||
/* --- public API functions --- */
|
||
/**
|
||
* g_type_class_ref:
|
||
* @type: type ID of a classed type
|
||
*
|
||
* Increments the reference count of the class structure belonging to
|
||
* @type. This function will demand-create the class if it doesn't
|
||
* exist already.
|
||
*
|
||
* Returns: (type GObject.TypeClass) (transfer none): the #GTypeClass
|
||
* structure for the given type ID
|
||
*/
|
||
gpointer
|
||
g_type_class_ref (GType type)
|
||
{
|
||
TypeNode *node;
|
||
GType ptype;
|
||
gboolean holds_ref;
|
||
GTypeClass *pclass;
|
||
|
||
/* optimize for common code path */
|
||
node = lookup_type_node_I (type);
|
||
if (!node || !node->is_classed)
|
||
{
|
||
g_warning ("cannot retrieve class for invalid (unclassed) type '%s'",
|
||
type_descriptive_name_I (type));
|
||
return NULL;
|
||
}
|
||
|
||
if (G_LIKELY (type_data_ref_U (node)))
|
||
{
|
||
if (G_LIKELY (g_atomic_int_get (&node->data->class.init_state) == INITIALIZED))
|
||
return node->data->class.class;
|
||
holds_ref = TRUE;
|
||
}
|
||
else
|
||
holds_ref = FALSE;
|
||
|
||
/* here, we either have node->data->class.class == NULL, or a recursive
|
||
* call to g_type_class_ref() with a partly initialized class, or
|
||
* node->data->class.init_state == INITIALIZED, because any
|
||
* concurrently running initialization was guarded by class_init_rec_mutex.
|
||
*/
|
||
g_rec_mutex_lock (&class_init_rec_mutex); /* required locking order: 1) class_init_rec_mutex, 2) type_rw_lock */
|
||
|
||
/* we need an initialized parent class for initializing derived classes */
|
||
ptype = NODE_PARENT_TYPE (node);
|
||
pclass = ptype ? g_type_class_ref (ptype) : NULL;
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
if (!holds_ref)
|
||
type_data_ref_Wm (node);
|
||
|
||
if (!node->data->class.class) /* class uninitialized */
|
||
type_class_init_Wm (node, pclass);
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
|
||
if (pclass)
|
||
g_type_class_unref (pclass);
|
||
|
||
g_rec_mutex_unlock (&class_init_rec_mutex);
|
||
|
||
return node->data->class.class;
|
||
}
|
||
|
||
/**
|
||
* g_type_class_unref:
|
||
* @g_class: (type GObject.TypeClass): a #GTypeClass structure to unref
|
||
*
|
||
* Decrements the reference count of the class structure being passed in.
|
||
* Once the last reference count of a class has been released, classes
|
||
* may be finalized by the type system, so further dereferencing of a
|
||
* class pointer after g_type_class_unref() are invalid.
|
||
*/
|
||
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);
|
||
if (node && node->is_classed && NODE_REFCOUNT (node))
|
||
type_data_unref_U (node, FALSE);
|
||
else
|
||
g_warning ("cannot unreference class of invalid (unclassed) type '%s'",
|
||
type_descriptive_name_I (class->g_type));
|
||
}
|
||
|
||
/**
|
||
* g_type_class_unref_uncached: (skip)
|
||
* @g_class: (type GObject.TypeClass): a #GTypeClass structure to unref
|
||
*
|
||
* A variant of g_type_class_unref() for use in #GTypeClassCacheFunc
|
||
* implementations. It unreferences a class without consulting the chain
|
||
* of #GTypeClassCacheFuncs, avoiding the recursion which would occur
|
||
* otherwise.
|
||
*/
|
||
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_I (class->g_type);
|
||
if (node && node->is_classed && NODE_REFCOUNT (node))
|
||
type_data_unref_U (node, TRUE);
|
||
else
|
||
g_warning ("cannot unreference class of invalid (unclassed) type '%s'",
|
||
type_descriptive_name_I (class->g_type));
|
||
}
|
||
|
||
/**
|
||
* g_type_class_peek:
|
||
* @type: type ID of a classed type
|
||
*
|
||
* This function is essentially the same as g_type_class_ref(),
|
||
* except that the classes reference count isn't incremented.
|
||
* As a consequence, this function may return %NULL if the class
|
||
* of the type passed in does not currently exist (hasn't been
|
||
* referenced before).
|
||
*
|
||
* Returns: (type GObject.TypeClass) (transfer none): the #GTypeClass
|
||
* structure for the given type ID or %NULL if the class does not
|
||
* currently exist
|
||
*/
|
||
gpointer
|
||
g_type_class_peek (GType type)
|
||
{
|
||
TypeNode *node;
|
||
gpointer class;
|
||
|
||
node = lookup_type_node_I (type);
|
||
if (node && node->is_classed && NODE_REFCOUNT (node) &&
|
||
g_atomic_int_get (&node->data->class.init_state) == INITIALIZED)
|
||
/* ref_count _may_ be 0 */
|
||
class = node->data->class.class;
|
||
else
|
||
class = NULL;
|
||
|
||
return class;
|
||
}
|
||
|
||
/**
|
||
* g_type_class_peek_static:
|
||
* @type: type ID of a classed type
|
||
*
|
||
* A more efficient version of g_type_class_peek() which works only for
|
||
* static types.
|
||
*
|
||
* Returns: (type GObject.TypeClass) (transfer none): the #GTypeClass
|
||
* structure for the given type ID or %NULL if the class does not
|
||
* currently exist or is dynamically loaded
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
gpointer
|
||
g_type_class_peek_static (GType type)
|
||
{
|
||
TypeNode *node;
|
||
gpointer class;
|
||
|
||
node = lookup_type_node_I (type);
|
||
if (node && node->is_classed && NODE_REFCOUNT (node) &&
|
||
/* peek only static types: */ node->plugin == NULL &&
|
||
g_atomic_int_get (&node->data->class.init_state) == INITIALIZED)
|
||
/* ref_count _may_ be 0 */
|
||
class = node->data->class.class;
|
||
else
|
||
class = NULL;
|
||
|
||
return class;
|
||
}
|
||
|
||
/**
|
||
* g_type_class_peek_parent:
|
||
* @g_class: (type GObject.TypeClass): the #GTypeClass structure to
|
||
* retrieve the parent class for
|
||
*
|
||
* This is a convenience function often needed in class initializers.
|
||
* It returns the class structure of the immediate parent type of the
|
||
* class passed in. Since derived classes hold a reference count on
|
||
* their parent classes as long as they are instantiated, the returned
|
||
* class will always exist.
|
||
*
|
||
* This function is essentially equivalent to:
|
||
* g_type_class_peek (g_type_parent (G_TYPE_FROM_CLASS (g_class)))
|
||
*
|
||
* Returns: (type GObject.TypeClass) (transfer none): the parent class
|
||
* of @g_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));
|
||
/* We used to acquire a read lock here. That is not necessary, since
|
||
* parent->data->class.class is constant as long as the derived class
|
||
* exists.
|
||
*/
|
||
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);
|
||
|
||
return class;
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_peek:
|
||
* @instance_class: (type GObject.TypeClass): a #GTypeClass structure
|
||
* @iface_type: an interface ID which this class conforms to
|
||
*
|
||
* Returns the #GTypeInterface structure of an interface to which the
|
||
* passed in class conforms.
|
||
*
|
||
* Returns: (type GObject.TypeInterface) (transfer none): the #GTypeInterface
|
||
* structure of @iface_type if implemented by @instance_class, %NULL
|
||
* otherwise
|
||
*/
|
||
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)
|
||
type_lookup_iface_vtable_I (node, iface, &vtable);
|
||
else
|
||
g_warning (G_STRLOC ": invalid class pointer '%p'", class);
|
||
|
||
return vtable;
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_peek_parent:
|
||
* @g_iface: (type GObject.TypeInterface): a #GTypeInterface structure
|
||
*
|
||
* Returns the corresponding #GTypeInterface structure of the parent type
|
||
* of the instance type to which @g_iface belongs. This is useful when
|
||
* deriving the implementation of an interface from the parent type and
|
||
* then possibly overriding some methods.
|
||
*
|
||
* Returns: (transfer none) (type GObject.TypeInterface): the
|
||
* corresponding #GTypeInterface structure of the parent type of the
|
||
* instance type to which @g_iface belongs, or %NULL if the parent
|
||
* type doesn't conform to the interface
|
||
*/
|
||
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)
|
||
type_lookup_iface_vtable_I (node, iface, &vtable);
|
||
else if (node)
|
||
g_warning (G_STRLOC ": invalid interface pointer '%p'", g_iface);
|
||
|
||
return vtable;
|
||
}
|
||
|
||
/**
|
||
* g_type_default_interface_ref:
|
||
* @g_type: an interface type
|
||
*
|
||
* Increments the reference count for the interface type @g_type,
|
||
* and returns the default interface vtable for the type.
|
||
*
|
||
* If the type is not currently in use, then the default vtable
|
||
* for the type will be created and initialized by calling
|
||
* the base interface init and default vtable init functions for
|
||
* the type (the @base_init and @class_init members of #GTypeInfo).
|
||
* Calling g_type_default_interface_ref() is useful when you
|
||
* want to make sure that signals and properties for an interface
|
||
* have been installed.
|
||
*
|
||
* Since: 2.4
|
||
*
|
||
* Returns: (type GObject.TypeInterface) (transfer none): the default
|
||
* vtable for the interface; call g_type_default_interface_unref()
|
||
* when you are done using the interface.
|
||
*/
|
||
gpointer
|
||
g_type_default_interface_ref (GType g_type)
|
||
{
|
||
TypeNode *node;
|
||
gpointer dflt_vtable;
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
node = lookup_type_node_I (g_type);
|
||
if (!node || !NODE_IS_IFACE (node) ||
|
||
(node->data && NODE_REFCOUNT (node) == 0))
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_warning ("cannot retrieve default vtable for invalid or non-interface type '%s'",
|
||
type_descriptive_name_I (g_type));
|
||
return NULL;
|
||
}
|
||
|
||
if (!node->data || !node->data->iface.dflt_vtable)
|
||
{
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
g_rec_mutex_lock (&class_init_rec_mutex); /* required locking order: 1) class_init_rec_mutex, 2) type_rw_lock */
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
node = lookup_type_node_I (g_type);
|
||
type_data_ref_Wm (node);
|
||
type_iface_ensure_dflt_vtable_Wm (node);
|
||
g_rec_mutex_unlock (&class_init_rec_mutex);
|
||
}
|
||
else
|
||
type_data_ref_Wm (node); /* ref_count >= 1 already */
|
||
|
||
dflt_vtable = node->data->iface.dflt_vtable;
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
|
||
return dflt_vtable;
|
||
}
|
||
|
||
/**
|
||
* g_type_default_interface_peek:
|
||
* @g_type: an interface type
|
||
*
|
||
* If the interface type @g_type is currently in use, returns its
|
||
* default interface vtable.
|
||
*
|
||
* Since: 2.4
|
||
*
|
||
* Returns: (type GObject.TypeInterface) (transfer none): the default
|
||
* vtable for the interface, or %NULL if the type is not currently
|
||
* in use
|
||
*/
|
||
gpointer
|
||
g_type_default_interface_peek (GType g_type)
|
||
{
|
||
TypeNode *node;
|
||
gpointer vtable;
|
||
|
||
node = lookup_type_node_I (g_type);
|
||
if (node && NODE_IS_IFACE (node) && NODE_REFCOUNT (node))
|
||
vtable = node->data->iface.dflt_vtable;
|
||
else
|
||
vtable = NULL;
|
||
|
||
return vtable;
|
||
}
|
||
|
||
/**
|
||
* g_type_default_interface_unref:
|
||
* @g_iface: (type GObject.TypeInterface): the default vtable
|
||
* structure for an interface, as returned by g_type_default_interface_ref()
|
||
*
|
||
* Decrements the reference count for the type corresponding to the
|
||
* interface default vtable @g_iface. If the type is dynamic, then
|
||
* when no one is using the interface and all references have
|
||
* been released, the finalize function for the interface's default
|
||
* vtable (the @class_finalize member of #GTypeInfo) will be called.
|
||
*
|
||
* Since: 2.4
|
||
*/
|
||
void
|
||
g_type_default_interface_unref (gpointer g_iface)
|
||
{
|
||
TypeNode *node;
|
||
GTypeInterface *vtable = g_iface;
|
||
|
||
g_return_if_fail (g_iface != NULL);
|
||
|
||
node = lookup_type_node_I (vtable->g_type);
|
||
if (node && NODE_IS_IFACE (node))
|
||
type_data_unref_U (node, FALSE);
|
||
else
|
||
g_warning ("cannot unreference invalid interface default vtable for '%s'",
|
||
type_descriptive_name_I (vtable->g_type));
|
||
}
|
||
|
||
/**
|
||
* g_type_name:
|
||
* @type: type to return name for
|
||
*
|
||
* Get the unique name that is assigned to a type ID. Note that this
|
||
* function (like all other GType API) cannot cope with invalid type
|
||
* IDs. %G_TYPE_INVALID may be passed to this function, as may be any
|
||
* other validly registered type ID, but randomized type IDs should
|
||
* not be passed in and will most likely lead to a crash.
|
||
*
|
||
* Returns: static type name or %NULL
|
||
*/
|
||
const gchar *
|
||
g_type_name (GType type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
g_assert_type_system_initialized ();
|
||
|
||
node = lookup_type_node_I (type);
|
||
|
||
return node ? NODE_NAME (node) : NULL;
|
||
}
|
||
|
||
/**
|
||
* g_type_qname:
|
||
* @type: type to return quark of type name for
|
||
*
|
||
* Get the corresponding quark of the type IDs name.
|
||
*
|
||
* Returns: the type names quark or 0
|
||
*/
|
||
GQuark
|
||
g_type_qname (GType type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
|
||
return node ? node->qname : 0;
|
||
}
|
||
|
||
/**
|
||
* g_type_from_name:
|
||
* @name: type name to look up
|
||
*
|
||
* Look up the type ID from a given type name, returning 0 if no type
|
||
* has been registered under this name (this is the preferred method
|
||
* to find out by name whether a specific type has been registered
|
||
* yet).
|
||
*
|
||
* Returns: corresponding type ID or 0
|
||
*/
|
||
GType
|
||
g_type_from_name (const gchar *name)
|
||
{
|
||
GType type = 0;
|
||
|
||
g_return_val_if_fail (name != NULL, 0);
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
type = (GType) g_hash_table_lookup (static_type_nodes_ht, name);
|
||
G_READ_UNLOCK (&type_rw_lock);
|
||
|
||
return type;
|
||
}
|
||
|
||
/**
|
||
* g_type_parent:
|
||
* @type: the derived type
|
||
*
|
||
* Return the direct parent type of the passed in type. If the passed
|
||
* in type has no parent, i.e. is a fundamental type, 0 is returned.
|
||
*
|
||
* Returns: the parent type
|
||
*/
|
||
GType
|
||
g_type_parent (GType type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
|
||
return node ? NODE_PARENT_TYPE (node) : 0;
|
||
}
|
||
|
||
/**
|
||
* g_type_depth:
|
||
* @type: a #GType
|
||
*
|
||
* Returns the length of the ancestry of the passed in type. This
|
||
* includes the type itself, so that e.g. a fundamental type has depth 1.
|
||
*
|
||
* Returns: the depth of @type
|
||
*/
|
||
guint
|
||
g_type_depth (GType type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
|
||
return node ? node->n_supers + 1 : 0;
|
||
}
|
||
|
||
/**
|
||
* g_type_next_base:
|
||
* @leaf_type: descendant of @root_type and the type to be returned
|
||
* @root_type: immediate parent of the returned type
|
||
*
|
||
* Given a @leaf_type and a @root_type which is contained in its
|
||
* ancestry, return the type that @root_type is the immediate parent
|
||
* of. In other words, this function determines the type that is
|
||
* derived directly from @root_type which is also a base class of
|
||
* @leaf_type. Given a root type and a leaf type, this function can
|
||
* be used to determine the types and order in which the leaf type is
|
||
* descended from the root type.
|
||
*
|
||
* Returns: immediate child of @root_type and ancestor of @leaf_type
|
||
*/
|
||
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 && */
|
||
NODE_IS_ANCESTOR (iface_node, 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)
|
||
{
|
||
if (have_lock)
|
||
{
|
||
if (type_lookup_iface_entry_L (node, iface_node))
|
||
match = TRUE;
|
||
}
|
||
else
|
||
{
|
||
if (type_lookup_iface_vtable_I (node, iface_node, NULL))
|
||
match = TRUE;
|
||
}
|
||
}
|
||
if (!match &&
|
||
support_prerequisites)
|
||
{
|
||
if (!have_lock)
|
||
G_READ_LOCK (&type_rw_lock);
|
||
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);
|
||
}
|
||
|
||
/**
|
||
* g_type_is_a:
|
||
* @type: type to check ancestry for
|
||
* @is_a_type: possible ancestor of @type or interface that @type
|
||
* could conform to
|
||
*
|
||
* If @is_a_type is a derivable type, check whether @type is a
|
||
* descendant of @is_a_type. If @is_a_type is an interface, check
|
||
* whether @type conforms to it.
|
||
*
|
||
* Returns: %TRUE if @type is a @is_a_type
|
||
*/
|
||
gboolean
|
||
g_type_is_a (GType type,
|
||
GType iface_type)
|
||
{
|
||
TypeNode *node, *iface_node;
|
||
gboolean is_a;
|
||
|
||
if (type == iface_type)
|
||
return TRUE;
|
||
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_children:
|
||
* @type: the parent type
|
||
* @n_children: (out) (optional): location to store the length of
|
||
* the returned array, or %NULL
|
||
*
|
||
* Return a newly allocated and 0-terminated array of type IDs, listing
|
||
* the child types of @type.
|
||
*
|
||
* Returns: (array length=n_children) (transfer full): Newly allocated
|
||
* and 0-terminated array of child types, free with g_free()
|
||
*/
|
||
GType*
|
||
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);
|
||
if (node->n_children != 0)
|
||
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;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_type_interfaces:
|
||
* @type: the type to list interface types for
|
||
* @n_interfaces: (out) (optional): location to store the length of
|
||
* the returned array, or %NULL
|
||
*
|
||
* Return a newly allocated and 0-terminated array of type IDs, listing
|
||
* the interface types that @type conforms to.
|
||
*
|
||
* Returns: (array length=n_interfaces) (transfer full): Newly allocated
|
||
* and 0-terminated array of interface types, free with g_free()
|
||
*/
|
||
GType*
|
||
g_type_interfaces (GType type,
|
||
guint *n_interfaces)
|
||
{
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
if (node && node->is_instantiatable)
|
||
{
|
||
IFaceEntries *entries;
|
||
GType *ifaces;
|
||
guint i;
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
entries = CLASSED_NODE_IFACES_ENTRIES_LOCKED (node);
|
||
if (entries)
|
||
{
|
||
ifaces = g_new (GType, IFACE_ENTRIES_N_ENTRIES (entries) + 1);
|
||
for (i = 0; i < IFACE_ENTRIES_N_ENTRIES (entries); i++)
|
||
ifaces[i] = entries->entry[i].iface_type;
|
||
}
|
||
else
|
||
{
|
||
ifaces = g_new (GType, 1);
|
||
i = 0;
|
||
}
|
||
ifaces[i] = 0;
|
||
|
||
if (n_interfaces)
|
||
*n_interfaces = i;
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_get_qdata:
|
||
* @type: a #GType
|
||
* @quark: a #GQuark id to identify the data
|
||
*
|
||
* Obtains data which has previously been attached to @type
|
||
* with g_type_set_qdata().
|
||
*
|
||
* Note that this does not take subtyping into account; data
|
||
* attached to one type with g_type_set_qdata() cannot
|
||
* be retrieved from a subtype using g_type_get_qdata().
|
||
*
|
||
* Returns: (transfer none): the data, or %NULL if no data was found
|
||
*/
|
||
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;
|
||
memmove (qdata + i + 1, qdata + i, sizeof (qdata[0]) * (gdata->n_qdatas - i - 1));
|
||
qdata[i].quark = quark;
|
||
qdata[i].data = data;
|
||
}
|
||
|
||
/**
|
||
* g_type_set_qdata:
|
||
* @type: a #GType
|
||
* @quark: a #GQuark id to identify the data
|
||
* @data: the data
|
||
*
|
||
* Attaches arbitrary data to a type.
|
||
*/
|
||
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));
|
||
}
|
||
|
||
/**
|
||
* g_type_query:
|
||
* @type: #GType of a static, classed type
|
||
* @query: (out caller-allocates): a user provided structure that is
|
||
* filled in with constant values upon success
|
||
*
|
||
* Queries the type system for information about a specific type.
|
||
* This function will fill in a user-provided structure to hold
|
||
* type-specific information. If an invalid #GType is passed in, the
|
||
* @type member of the #GTypeQuery is 0. All members filled into the
|
||
* #GTypeQuery structure should be considered constant and have to be
|
||
* left untouched.
|
||
*/
|
||
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);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_type_get_instance_count:
|
||
* @type: a #GType
|
||
*
|
||
* Returns the number of instances allocated of the particular type;
|
||
* this is only available if GLib is built with debugging support and
|
||
* the instance_count debug flag is set (by setting the GOBJECT_DEBUG
|
||
* variable to include instance-count).
|
||
*
|
||
* Returns: the number of instances allocated of the given type;
|
||
* if instance counts are not available, returns 0.
|
||
*
|
||
* Since: 2.44
|
||
*/
|
||
int
|
||
g_type_get_instance_count (GType type)
|
||
{
|
||
#ifdef G_ENABLE_DEBUG
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
g_return_val_if_fail (node != NULL, 0);
|
||
|
||
return g_atomic_int_get (&node->instance_count);
|
||
#else
|
||
return 0;
|
||
#endif
|
||
}
|
||
|
||
/* --- 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;
|
||
}
|
||
|
||
/**
|
||
* g_type_get_plugin:
|
||
* @type: #GType to retrieve the plugin for
|
||
*
|
||
* Returns the #GTypePlugin structure for @type.
|
||
*
|
||
* Returns: (transfer none): the corresponding plugin
|
||
* if @type is a dynamic type, %NULL otherwise
|
||
*/
|
||
GTypePlugin*
|
||
g_type_get_plugin (GType type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
node = lookup_type_node_I (type);
|
||
|
||
return node ? node->plugin : NULL;
|
||
}
|
||
|
||
/**
|
||
* g_type_interface_get_plugin:
|
||
* @instance_type: #GType of an instantiatable type
|
||
* @interface_type: #GType of an interface type
|
||
*
|
||
* Returns the #GTypePlugin structure for the dynamic interface
|
||
* @interface_type which has been added to @instance_type, or %NULL
|
||
* if @interface_type has not been added to @instance_type or does
|
||
* not have a #GTypePlugin structure. See g_type_add_interface_dynamic().
|
||
*
|
||
* Returns: (transfer none): the #GTypePlugin for the dynamic
|
||
* interface @interface_type of @instance_type
|
||
*/
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_fundamental_next:
|
||
*
|
||
* Returns the next free fundamental type id which can be used to
|
||
* register a new fundamental type with g_type_register_fundamental().
|
||
* The returned type ID represents the highest currently registered
|
||
* fundamental type identifier.
|
||
*
|
||
* Returns: the next available fundamental type ID to be registered,
|
||
* or 0 if the type system ran out of fundamental type IDs
|
||
*/
|
||
GType
|
||
g_type_fundamental_next (void)
|
||
{
|
||
GType type;
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
type = static_fundamental_next;
|
||
G_READ_UNLOCK (&type_rw_lock);
|
||
type = G_TYPE_MAKE_FUNDAMENTAL (type);
|
||
return type <= G_TYPE_FUNDAMENTAL_MAX ? type : 0;
|
||
}
|
||
|
||
/**
|
||
* g_type_fundamental:
|
||
* @type_id: valid type ID
|
||
*
|
||
* Internal function, used to extract the fundamental type ID portion.
|
||
* Use G_TYPE_FUNDAMENTAL() instead.
|
||
*
|
||
* Returns: fundamental type ID
|
||
*/
|
||
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_instance_is_fundamentally_a (GTypeInstance *type_instance,
|
||
GType fundamental_type)
|
||
{
|
||
TypeNode *node;
|
||
if (!type_instance || !type_instance->g_class)
|
||
return FALSE;
|
||
node = lookup_type_node_I (type_instance->g_class->g_type);
|
||
return node && (NODE_FUNDAMENTAL_TYPE(node) == fundamental_type);
|
||
}
|
||
|
||
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));
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* g_type_check_instance:
|
||
* @instance: a valid #GTypeInstance structure
|
||
*
|
||
* Private helper function to aid implementation of the
|
||
* G_TYPE_CHECK_INSTANCE() macro.
|
||
*
|
||
* Returns: %TRUE if @instance is valid, %FALSE otherwise
|
||
*/
|
||
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_REFCOUNT (node) > 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 (const GValue *value)
|
||
{
|
||
return value && type_check_is_value_type_U (value->g_type);
|
||
}
|
||
|
||
gboolean
|
||
g_type_check_value_holds (const GValue *value,
|
||
GType type)
|
||
{
|
||
return value && type_check_is_value_type_U (value->g_type) && g_type_is_a (value->g_type, type);
|
||
}
|
||
|
||
/**
|
||
* g_type_value_table_peek: (skip)
|
||
* @type: a #GType
|
||
*
|
||
* Returns the location of the #GTypeValueTable associated with @type.
|
||
*
|
||
* Note that this function should only be used from source code
|
||
* that implements or has internal knowledge of the implementation of
|
||
* @type.
|
||
*
|
||
* Returns: location of the #GTypeValueTable associated with @type or
|
||
* %NULL if there is no #GTypeValueTable associated with @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;
|
||
|
||
if (node && NODE_REFCOUNT (node) && node->mutatable_check_cache)
|
||
return node->data->common.value_table;
|
||
|
||
G_READ_LOCK (&type_rw_lock);
|
||
|
||
restart_table_peek:
|
||
has_refed_data = node && node->data && NODE_REFCOUNT (node) > 0;
|
||
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 '%" G_GSIZE_FORMAT "' 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;
|
||
}
|
||
|
||
const gchar *
|
||
g_type_name_from_instance (GTypeInstance *instance)
|
||
{
|
||
if (!instance)
|
||
return "<NULL-instance>";
|
||
else
|
||
return g_type_name_from_class (instance->g_class);
|
||
}
|
||
|
||
const gchar *
|
||
g_type_name_from_class (GTypeClass *g_class)
|
||
{
|
||
if (!g_class)
|
||
return "<NULL-class>";
|
||
else
|
||
return g_type_name (g_class->g_type);
|
||
}
|
||
|
||
|
||
/* --- private api for gboxed.c --- */
|
||
gpointer
|
||
_g_type_boxed_copy (GType type, gpointer value)
|
||
{
|
||
TypeNode *node = lookup_type_node_I (type);
|
||
|
||
return node->data->boxed.copy_func (value);
|
||
}
|
||
|
||
void
|
||
_g_type_boxed_free (GType type, gpointer value)
|
||
{
|
||
TypeNode *node = lookup_type_node_I (type);
|
||
|
||
node->data->boxed.free_func (value);
|
||
}
|
||
|
||
void
|
||
_g_type_boxed_init (GType type,
|
||
GBoxedCopyFunc copy_func,
|
||
GBoxedFreeFunc free_func)
|
||
{
|
||
TypeNode *node = lookup_type_node_I (type);
|
||
|
||
node->data->boxed.copy_func = copy_func;
|
||
node->data->boxed.free_func = free_func;
|
||
}
|
||
|
||
/* --- initialization --- */
|
||
/**
|
||
* g_type_init_with_debug_flags:
|
||
* @debug_flags: bitwise combination of #GTypeDebugFlags values for
|
||
* debugging purposes
|
||
*
|
||
* This function used to initialise the type system with debugging
|
||
* flags. Since GLib 2.36, the type system is initialised automatically
|
||
* and this function does nothing.
|
||
*
|
||
* If you need to enable debugging features, use the GOBJECT_DEBUG
|
||
* environment variable.
|
||
*
|
||
* Deprecated: 2.36: the type system is now initialised automatically
|
||
*/
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
void
|
||
g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
|
||
{
|
||
g_assert_type_system_initialized ();
|
||
|
||
if (debug_flags)
|
||
g_message ("g_type_init_with_debug_flags() is no longer supported. Use the GOBJECT_DEBUG environment variable.");
|
||
}
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
/**
|
||
* g_type_init:
|
||
*
|
||
* This function used to initialise the type system. Since GLib 2.36,
|
||
* the type system is initialised automatically and this function does
|
||
* nothing.
|
||
*
|
||
* Deprecated: 2.36: the type system is now initialised automatically
|
||
*/
|
||
void
|
||
g_type_init (void)
|
||
{
|
||
g_assert_type_system_initialized ();
|
||
}
|
||
|
||
static void
|
||
gobject_init (void)
|
||
{
|
||
const gchar *env_string;
|
||
GTypeInfo info;
|
||
TypeNode *node;
|
||
GType type G_GNUC_UNUSED /* when compiling with G_DISABLE_ASSERT */;
|
||
|
||
/* Ensure GLib is initialized first, see
|
||
* https://bugzilla.gnome.org/show_bug.cgi?id=756139
|
||
*/
|
||
GLIB_PRIVATE_CALL (glib_init) ();
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
/* setup GObject library wide debugging flags */
|
||
env_string = g_getenv ("GOBJECT_DEBUG");
|
||
if (env_string != NULL)
|
||
{
|
||
GDebugKey debug_keys[] = {
|
||
{ "objects", G_TYPE_DEBUG_OBJECTS },
|
||
{ "instance-count", G_TYPE_DEBUG_INSTANCE_COUNT },
|
||
{ "signals", G_TYPE_DEBUG_SIGNALS },
|
||
};
|
||
|
||
_g_type_debug_flags = g_parse_debug_string (env_string, debug_keys, G_N_ELEMENTS (debug_keys));
|
||
}
|
||
|
||
/* 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_str_hash, g_str_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, g_intern_static_string ("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, g_intern_static_string ("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_ensure (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 ();
|
||
}
|
||
|
||
#if defined (G_OS_WIN32)
|
||
|
||
BOOL WINAPI DllMain (HINSTANCE hinstDLL,
|
||
DWORD fdwReason,
|
||
LPVOID lpvReserved);
|
||
|
||
BOOL WINAPI
|
||
DllMain (HINSTANCE hinstDLL,
|
||
DWORD fdwReason,
|
||
LPVOID lpvReserved)
|
||
{
|
||
switch (fdwReason)
|
||
{
|
||
case DLL_PROCESS_ATTACH:
|
||
gobject_init ();
|
||
break;
|
||
|
||
default:
|
||
/* do nothing */
|
||
;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#elif defined (G_HAS_CONSTRUCTORS)
|
||
#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
|
||
#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(gobject_init_ctor)
|
||
#endif
|
||
G_DEFINE_CONSTRUCTOR(gobject_init_ctor)
|
||
|
||
static void
|
||
gobject_init_ctor (void)
|
||
{
|
||
gobject_init ();
|
||
}
|
||
|
||
#else
|
||
# error Your platform/compiler is missing constructor support
|
||
#endif
|
||
|
||
/**
|
||
* g_type_class_add_private:
|
||
* @g_class: (type GObject.TypeClass): class structure for an instantiatable
|
||
* type
|
||
* @private_size: size of private structure
|
||
*
|
||
* Registers a private structure for an instantiatable type.
|
||
*
|
||
* When an object is allocated, the private structures for
|
||
* the type and all of its parent types are allocated
|
||
* sequentially in the same memory block as the public
|
||
* structures, and are zero-filled.
|
||
*
|
||
* Note that the accumulated size of the private structures of
|
||
* a type and all its parent types cannot exceed 64 KiB.
|
||
*
|
||
* This function should be called in the type's class_init() function.
|
||
* The private structure can be retrieved using the
|
||
* G_TYPE_INSTANCE_GET_PRIVATE() macro.
|
||
*
|
||
* The following example shows attaching a private structure
|
||
* MyObjectPrivate to an object MyObject defined in the standard
|
||
* GObject fashion in the type's class_init() function.
|
||
*
|
||
* Note the use of a structure member "priv" to avoid the overhead
|
||
* of repeatedly calling MY_OBJECT_GET_PRIVATE().
|
||
*
|
||
* |[<!-- language="C" -->
|
||
* typedef struct _MyObject MyObject;
|
||
* typedef struct _MyObjectPrivate MyObjectPrivate;
|
||
*
|
||
* struct _MyObject {
|
||
* GObject parent;
|
||
*
|
||
* MyObjectPrivate *priv;
|
||
* };
|
||
*
|
||
* struct _MyObjectPrivate {
|
||
* int some_field;
|
||
* };
|
||
*
|
||
* static void
|
||
* my_object_class_init (MyObjectClass *klass)
|
||
* {
|
||
* g_type_class_add_private (klass, sizeof (MyObjectPrivate));
|
||
* }
|
||
*
|
||
* static void
|
||
* my_object_init (MyObject *my_object)
|
||
* {
|
||
* my_object->priv = G_TYPE_INSTANCE_GET_PRIVATE (my_object,
|
||
* MY_TYPE_OBJECT,
|
||
* MyObjectPrivate);
|
||
* // my_object->priv->some_field will be automatically initialised to 0
|
||
* }
|
||
*
|
||
* static int
|
||
* my_object_get_some_field (MyObject *my_object)
|
||
* {
|
||
* MyObjectPrivate *priv;
|
||
*
|
||
* g_return_val_if_fail (MY_IS_OBJECT (my_object), 0);
|
||
*
|
||
* priv = my_object->priv;
|
||
*
|
||
* return priv->some_field;
|
||
* }
|
||
* ]|
|
||
*
|
||
* Since: 2.4
|
||
* Deprecated: 2.58: Use the G_ADD_PRIVATE() macro with the `G_DEFINE_*`
|
||
* family of macros to add instance private data to a type
|
||
*/
|
||
void
|
||
g_type_class_add_private (gpointer g_class,
|
||
gsize private_size)
|
||
{
|
||
GType instance_type = ((GTypeClass *)g_class)->g_type;
|
||
TypeNode *node = lookup_type_node_I (instance_type);
|
||
|
||
g_return_if_fail (private_size > 0);
|
||
g_return_if_fail (private_size <= 0xffff);
|
||
|
||
if (!node || !node->is_instantiatable || !node->data || node->data->class.class != g_class)
|
||
{
|
||
g_warning ("cannot add private field to invalid (non-instantiatable) type '%s'",
|
||
type_descriptive_name_I (instance_type));
|
||
return;
|
||
}
|
||
|
||
if (NODE_PARENT_TYPE (node))
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
if (node->data->instance.private_size != pnode->data->instance.private_size)
|
||
{
|
||
g_warning ("g_type_class_add_private() called multiple times for the same type");
|
||
return;
|
||
}
|
||
}
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
private_size = ALIGN_STRUCT (node->data->instance.private_size + private_size);
|
||
g_assert (private_size <= 0xffff);
|
||
node->data->instance.private_size = private_size;
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
}
|
||
|
||
/* semi-private, called only by the G_ADD_PRIVATE macro */
|
||
gint
|
||
g_type_add_instance_private (GType class_gtype,
|
||
gsize private_size)
|
||
{
|
||
TypeNode *node = lookup_type_node_I (class_gtype);
|
||
|
||
g_return_val_if_fail (private_size > 0, 0);
|
||
g_return_val_if_fail (private_size <= 0xffff, 0);
|
||
|
||
if (!node || !node->is_classed || !node->is_instantiatable || !node->data)
|
||
{
|
||
g_warning ("cannot add private field to invalid (non-instantiatable) type '%s'",
|
||
type_descriptive_name_I (class_gtype));
|
||
return 0;
|
||
}
|
||
|
||
if (node->plugin != NULL)
|
||
{
|
||
g_warning ("cannot use g_type_add_instance_private() with dynamic type '%s'",
|
||
type_descriptive_name_I (class_gtype));
|
||
return 0;
|
||
}
|
||
|
||
/* in the future, we want to register the private data size of a type
|
||
* directly from the get_type() implementation so that we can take full
|
||
* advantage of the type definition macros that we already have.
|
||
*
|
||
* unfortunately, this does not behave correctly if a class in the middle
|
||
* of the type hierarchy uses the "old style" of private data registration
|
||
* from the class_init() implementation, as the private data offset is not
|
||
* going to be known until the full class hierarchy is initialized.
|
||
*
|
||
* in order to transition our code to the Glorious New Future™, we proceed
|
||
* with a two-step implementation: first, we provide this new function to
|
||
* register the private data size in the get_type() implementation and we
|
||
* hide it behind a macro. the function will return the private size, instead
|
||
* of the offset, which will be stored inside a static variable defined by
|
||
* the G_DEFINE_TYPE_EXTENDED macro. the G_DEFINE_TYPE_EXTENDED macro will
|
||
* check the variable and call g_type_class_add_instance_private(), which
|
||
* will use the data size and actually register the private data, then
|
||
* return the computed offset of the private data, which will be stored
|
||
* inside the static variable, so we can use it to retrieve the pointer
|
||
* to the private data structure.
|
||
*
|
||
* once all our code has been migrated to the new idiomatic form of private
|
||
* data registration, we will change the g_type_add_instance_private()
|
||
* function to actually perform the registration and return the offset
|
||
* of the private data; g_type_class_add_instance_private() already checks
|
||
* if the passed argument is negative (meaning that it's an offset in the
|
||
* GTypeInstance allocation) and becomes a no-op if that's the case. this
|
||
* should make the migration fully transparent even if we're effectively
|
||
* copying this macro into everybody's code.
|
||
*/
|
||
return private_size;
|
||
}
|
||
|
||
/* semi-private function, should only be used by G_DEFINE_TYPE_EXTENDED */
|
||
void
|
||
g_type_class_adjust_private_offset (gpointer g_class,
|
||
gint *private_size_or_offset)
|
||
{
|
||
GType class_gtype = ((GTypeClass *) g_class)->g_type;
|
||
TypeNode *node = lookup_type_node_I (class_gtype);
|
||
gssize private_size;
|
||
|
||
g_return_if_fail (private_size_or_offset != NULL);
|
||
|
||
/* if we have been passed the offset instead of the private data size,
|
||
* then we consider this as a no-op, and just return the value. see the
|
||
* comment in g_type_add_instance_private() for the full explanation.
|
||
*/
|
||
if (*private_size_or_offset > 0)
|
||
g_return_if_fail (*private_size_or_offset <= 0xffff);
|
||
else
|
||
return;
|
||
|
||
if (!node || !node->is_classed || !node->is_instantiatable || !node->data)
|
||
{
|
||
g_warning ("cannot add private field to invalid (non-instantiatable) type '%s'",
|
||
type_descriptive_name_I (class_gtype));
|
||
*private_size_or_offset = 0;
|
||
return;
|
||
}
|
||
|
||
if (NODE_PARENT_TYPE (node))
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
if (node->data->instance.private_size != pnode->data->instance.private_size)
|
||
{
|
||
g_warning ("g_type_add_instance_private() called multiple times for the same type");
|
||
*private_size_or_offset = 0;
|
||
return;
|
||
}
|
||
}
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
private_size = ALIGN_STRUCT (node->data->instance.private_size + *private_size_or_offset);
|
||
g_assert (private_size <= 0xffff);
|
||
node->data->instance.private_size = private_size;
|
||
|
||
*private_size_or_offset = -(gint) node->data->instance.private_size;
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
}
|
||
|
||
gpointer
|
||
g_type_instance_get_private (GTypeInstance *instance,
|
||
GType private_type)
|
||
{
|
||
TypeNode *node;
|
||
|
||
g_return_val_if_fail (instance != NULL && instance->g_class != NULL, NULL);
|
||
|
||
node = lookup_type_node_I (private_type);
|
||
if (G_UNLIKELY (!node || !node->is_instantiatable))
|
||
{
|
||
g_warning ("instance of invalid non-instantiatable type '%s'",
|
||
type_descriptive_name_I (instance->g_class->g_type));
|
||
return NULL;
|
||
}
|
||
|
||
return ((gchar *) instance) - node->data->instance.private_size;
|
||
}
|
||
|
||
/**
|
||
* g_type_class_get_instance_private_offset: (skip)
|
||
* @g_class: (type GObject.TypeClass): a #GTypeClass
|
||
*
|
||
* Gets the offset of the private data for instances of @g_class.
|
||
*
|
||
* This is how many bytes you should add to the instance pointer of a
|
||
* class in order to get the private data for the type represented by
|
||
* @g_class.
|
||
*
|
||
* You can only call this function after you have registered a private
|
||
* data area for @g_class using g_type_class_add_private().
|
||
*
|
||
* Returns: the offset, in bytes
|
||
*
|
||
* Since: 2.38
|
||
**/
|
||
gint
|
||
g_type_class_get_instance_private_offset (gpointer g_class)
|
||
{
|
||
GType instance_type;
|
||
guint16 parent_size;
|
||
TypeNode *node;
|
||
|
||
g_assert (g_class != NULL);
|
||
|
||
instance_type = ((GTypeClass *) g_class)->g_type;
|
||
node = lookup_type_node_I (instance_type);
|
||
|
||
g_assert (node != NULL);
|
||
g_assert (node->is_instantiatable);
|
||
|
||
if (NODE_PARENT_TYPE (node))
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
|
||
parent_size = pnode->data->instance.private_size;
|
||
}
|
||
else
|
||
parent_size = 0;
|
||
|
||
if (node->data->instance.private_size == parent_size)
|
||
g_error ("g_type_class_get_instance_private_offset() called on class %s but it has no private data",
|
||
g_type_name (instance_type));
|
||
|
||
return -(gint) node->data->instance.private_size;
|
||
}
|
||
|
||
/**
|
||
* g_type_add_class_private:
|
||
* @class_type: GType of a classed type
|
||
* @private_size: size of private structure
|
||
*
|
||
* Registers a private class structure for a classed type;
|
||
* when the class is allocated, the private structures for
|
||
* the class and all of its parent types are allocated
|
||
* sequentially in the same memory block as the public
|
||
* structures, and are zero-filled.
|
||
*
|
||
* This function should be called in the
|
||
* type's get_type() function after the type is registered.
|
||
* The private structure can be retrieved using the
|
||
* G_TYPE_CLASS_GET_PRIVATE() macro.
|
||
*
|
||
* Since: 2.24
|
||
*/
|
||
void
|
||
g_type_add_class_private (GType class_type,
|
||
gsize private_size)
|
||
{
|
||
TypeNode *node = lookup_type_node_I (class_type);
|
||
gsize offset;
|
||
|
||
g_return_if_fail (private_size > 0);
|
||
|
||
if (!node || !node->is_classed || !node->data)
|
||
{
|
||
g_warning ("cannot add class private field to invalid type '%s'",
|
||
type_descriptive_name_I (class_type));
|
||
return;
|
||
}
|
||
|
||
if (NODE_PARENT_TYPE (node))
|
||
{
|
||
TypeNode *pnode = lookup_type_node_I (NODE_PARENT_TYPE (node));
|
||
if (node->data->class.class_private_size != pnode->data->class.class_private_size)
|
||
{
|
||
g_warning ("g_type_add_class_private() called multiple times for the same type");
|
||
return;
|
||
}
|
||
}
|
||
|
||
G_WRITE_LOCK (&type_rw_lock);
|
||
|
||
offset = ALIGN_STRUCT (node->data->class.class_private_size);
|
||
node->data->class.class_private_size = offset + private_size;
|
||
|
||
G_WRITE_UNLOCK (&type_rw_lock);
|
||
}
|
||
|
||
gpointer
|
||
g_type_class_get_private (GTypeClass *klass,
|
||
GType private_type)
|
||
{
|
||
TypeNode *class_node;
|
||
TypeNode *private_node;
|
||
TypeNode *parent_node;
|
||
gsize offset;
|
||
|
||
g_return_val_if_fail (klass != NULL, NULL);
|
||
|
||
class_node = lookup_type_node_I (klass->g_type);
|
||
if (G_UNLIKELY (!class_node || !class_node->is_classed))
|
||
{
|
||
g_warning ("class of invalid type '%s'",
|
||
type_descriptive_name_I (klass->g_type));
|
||
return NULL;
|
||
}
|
||
|
||
private_node = lookup_type_node_I (private_type);
|
||
if (G_UNLIKELY (!private_node || !NODE_IS_ANCESTOR (private_node, class_node)))
|
||
{
|
||
g_warning ("attempt to retrieve private data for invalid type '%s'",
|
||
type_descriptive_name_I (private_type));
|
||
return NULL;
|
||
}
|
||
|
||
offset = ALIGN_STRUCT (class_node->data->class.class_size);
|
||
|
||
if (NODE_PARENT_TYPE (private_node))
|
||
{
|
||
parent_node = lookup_type_node_I (NODE_PARENT_TYPE (private_node));
|
||
g_assert (parent_node->data && NODE_REFCOUNT (parent_node) > 0);
|
||
|
||
if (G_UNLIKELY (private_node->data->class.class_private_size == parent_node->data->class.class_private_size))
|
||
{
|
||
g_warning ("g_type_instance_get_class_private() requires a prior call to g_type_add_class_private()");
|
||
return NULL;
|
||
}
|
||
|
||
offset += ALIGN_STRUCT (parent_node->data->class.class_private_size);
|
||
}
|
||
|
||
return G_STRUCT_MEMBER_P (klass, offset);
|
||
}
|
||
|
||
/**
|
||
* g_type_ensure:
|
||
* @type: a #GType
|
||
*
|
||
* Ensures that the indicated @type has been registered with the
|
||
* type system, and its _class_init() method has been run.
|
||
*
|
||
* In theory, simply calling the type's _get_type() method (or using
|
||
* the corresponding macro) is supposed take care of this. However,
|
||
* _get_type() methods are often marked %G_GNUC_CONST for performance
|
||
* reasons, even though this is technically incorrect (since
|
||
* %G_GNUC_CONST requires that the function not have side effects,
|
||
* which _get_type() methods do on the first call). As a result, if
|
||
* you write a bare call to a _get_type() macro, it may get optimized
|
||
* out by the compiler. Using g_type_ensure() guarantees that the
|
||
* type's _get_type() method is called.
|
||
*
|
||
* Since: 2.34
|
||
*/
|
||
void
|
||
g_type_ensure (GType type)
|
||
{
|
||
/* In theory, @type has already been resolved and so there's nothing
|
||
* to do here. But this protects us in the case where the function
|
||
* gets inlined (as it might in gobject_init_ctor() above).
|
||
*/
|
||
if (G_UNLIKELY (type == (GType)-1))
|
||
g_error ("can't happen");
|
||
}
|