Functions
G_TYPE_FUNDAMENTAL()
#define G_TYPE_FUNDAMENTAL(type) (g_type_fundamental (type))
The fundamental type which is the ancestor of type
.
Fundamental types are types that serve as ultimate bases for the derived types,
thus they are the roots of distinct inheritance hierarchies.
G_TYPE_MAKE_FUNDAMENTAL()
#define G_TYPE_MAKE_FUNDAMENTAL(x) ((GType) ((x) << G_TYPE_FUNDAMENTAL_SHIFT))
Get the type ID for the fundamental type number x
.
Use g_type_fundamental_next() instead of this macro to create new fundamental
types.
G_TYPE_IS_ABSTRACT()
#define G_TYPE_IS_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_ABSTRACT))
Checks if type
is an abstract type. An abstract type cannot be
instantiated and is normally used as an abstract base class for
derived classes.
G_TYPE_IS_DERIVED()
#define G_TYPE_IS_DERIVED(type) ((type) > G_TYPE_FUNDAMENTAL_MAX)
Checks if type
is derived (or in object-oriented terminology:
inherited) from another type (this holds true for all non-fundamental
types).
G_TYPE_IS_FUNDAMENTAL()
#define G_TYPE_IS_FUNDAMENTAL(type) ((type) <= G_TYPE_FUNDAMENTAL_MAX)
Checks if type
is a fundamental type.
G_TYPE_IS_VALUE_TYPE()
#define G_TYPE_IS_VALUE_TYPE(type) (g_type_check_is_value_type (type))
Checks if type
is a value type and can be used with g_value_init().
G_TYPE_HAS_VALUE_TABLE()
#define G_TYPE_HAS_VALUE_TABLE(type) (g_type_value_table_peek (type) != NULL)
Checks if type
has a GTypeValueTable.
G_TYPE_IS_CLASSED()
#define G_TYPE_IS_CLASSED(type) (g_type_test_flags ((type), G_TYPE_FLAG_CLASSED))
Checks if type
is a classed type.
G_TYPE_IS_INSTANTIATABLE()
#define G_TYPE_IS_INSTANTIATABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_INSTANTIATABLE))
Checks if type
can be instantiated. Instantiation is the
process of creating an instance (object) of this type.
G_TYPE_IS_DERIVABLE()
#define G_TYPE_IS_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DERIVABLE))
Checks if type
is a derivable type. A derivable type can
be used as the base class of a flat (single-level) class hierarchy.
G_TYPE_IS_DEEP_DERIVABLE()
#define G_TYPE_IS_DEEP_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEEP_DERIVABLE))
Checks if type
is a deep derivable type. A deep derivable type
can be used as the base class of a deep (multi-level) class hierarchy.
G_TYPE_IS_INTERFACE()
#define G_TYPE_IS_INTERFACE(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_INTERFACE)
Checks if type
is an interface type.
An interface type provides a pure API, the implementation
of which is provided by another type (which is then said to conform
to the interface). GLib interfaces are somewhat analogous to Java
interfaces and C++ classes containing only pure virtual functions,
with the difference that GType interfaces are not derivable (but see
g_type_interface_add_prerequisite() for an alternative).
G_TYPE_FROM_INSTANCE()
#define G_TYPE_FROM_INSTANCE(instance) (G_TYPE_FROM_CLASS (((GTypeInstance*) (instance))->g_class))
Get the type identifier from a given instance
structure.
This macro should only be used in type implementations.
G_TYPE_FROM_CLASS()
#define G_TYPE_FROM_CLASS(g_class) (((GTypeClass*) (g_class))->g_type)
Get the type identifier from a given class
structure.
This macro should only be used in type implementations.
G_TYPE_FROM_INTERFACE()
#define G_TYPE_FROM_INTERFACE(g_iface) (((GTypeInterface*) (g_iface))->g_type)
Get the type identifier from a given interface
structure.
This macro should only be used in type implementations.
G_TYPE_INSTANCE_GET_CLASS()
#define G_TYPE_INSTANCE_GET_CLASS(instance, g_type, c_type) (_G_TYPE_IGC ((instance), (g_type), c_type))
Get the class structure of a given instance
, casted
to a specified ancestor type g_type
of the instance.
Note that while calling a GInstanceInitFunc(), the class pointer
gets modified, so it might not always return the expected pointer.
This macro should only be used in type implementations.
Returns
a pointer to the class structure
G_TYPE_INSTANCE_GET_INTERFACE()
#define G_TYPE_INSTANCE_GET_INTERFACE(instance, g_type, c_type) (_G_TYPE_IGI ((instance), (g_type), c_type))
Get the interface structure for interface g_type
of a given instance
.
This macro should only be used in type implementations.
Returns
a pointer to the interface structure
G_TYPE_INSTANCE_GET_PRIVATE()
#define G_TYPE_INSTANCE_GET_PRIVATE(instance, g_type, c_type) ((c_type*) g_type_instance_get_private ((GTypeInstance*) (instance), (g_type))) GLIB_DEPRECATED_MACRO_IN_2_58_FOR(G_ADD_PRIVATE)
G_TYPE_INSTANCE_GET_PRIVATE has been deprecated since version 2.58 and should not be used in newly-written code.
Use G_ADD_PRIVATE and the generated
your_type_get_instance_private() function instead
Gets the private structure for a particular type.
The private structure must have been registered in the
class_init function with g_type_class_add_private().
This macro should only be used in type implementations.
Returns
a pointer to the private data structure.
[not nullable]
Since: 2.4
G_TYPE_CLASS_GET_PRIVATE()
#define G_TYPE_CLASS_GET_PRIVATE(klass, g_type, c_type) ((c_type*) g_type_class_get_private ((GTypeClass*) (klass), (g_type)))
Gets the private class structure for a particular type.
The private structure must have been registered in the
get_type() function with g_type_add_class_private().
This macro should only be used in type implementations.
Returns
a pointer to the private data structure.
[not nullable]
Since: 2.24
G_TYPE_CHECK_INSTANCE()
#define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
Checks if instance
is a valid GTypeInstance structure,
otherwise issues a warning and returns FALSE. NULL is not a valid
GTypeInstance.
This macro should only be used in type implementations.
G_TYPE_CHECK_INSTANCE_CAST()
#define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
Checks that instance
is an instance of the type identified by g_type
and issues a warning if this is not the case. Returns instance
casted
to a pointer to c_type
.
No warning will be issued if instance
is NULL, and NULL will be returned.
This macro should only be used in type implementations.
G_TYPE_CHECK_INSTANCE_TYPE()
#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
Checks if instance
is an instance of the type identified by g_type
. If
instance
is NULL, FALSE will be returned.
This macro should only be used in type implementations.
G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE()
#define G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE(instance, g_type) (_G_TYPE_CIFT ((instance), (g_type)))
Checks if instance
is an instance of the fundamental type identified by g_type
.
If instance
is NULL, FALSE will be returned.
This macro should only be used in type implementations.
G_TYPE_CHECK_CLASS_CAST()
#define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type) (_G_TYPE_CCC ((g_class), (g_type), c_type))
Checks that g_class
is a class structure of the type identified by g_type
and issues a warning if this is not the case. Returns g_class
casted
to a pointer to c_type
. NULL is not a valid class structure.
This macro should only be used in type implementations.
G_TYPE_CHECK_CLASS_TYPE()
#define G_TYPE_CHECK_CLASS_TYPE(g_class, g_type) (_G_TYPE_CCT ((g_class), (g_type)))
Checks if g_class
is a class structure of the type identified by
g_type
. If g_class
is NULL, FALSE will be returned.
This macro should only be used in type implementations.
G_TYPE_CHECK_VALUE()
#define G_TYPE_CHECK_VALUE(value) (_G_TYPE_CHV ((value)))
Checks if value
has been initialized to hold values
of a value type.
This macro should only be used in type implementations.
G_TYPE_CHECK_VALUE_TYPE()
#define G_TYPE_CHECK_VALUE_TYPE(value, g_type) (_G_TYPE_CVH ((value), (g_type)))
Checks if value
has been initialized to hold values
of type g_type
.
This macro should only be used in type implementations.
g_type_init ()
void
g_type_init (void);
g_type_init has been deprecated since version 2.36 and should not be used in newly-written code.
the type system is now initialised automatically
This function used to initialise the type system. Since GLib 2.36,
the type system is initialised automatically and this function does
nothing.
g_type_init_with_debug_flags ()
void
g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
g_type_init_with_debug_flags has been deprecated since version 2.36 and should not be used in newly-written code.
the type system is now initialised automatically
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.
g_type_name ()
const gchar *
g_type_name (GType type);
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
g_type_qname ()
GQuark
g_type_qname (GType type);
Get the corresponding quark of the type IDs name.
Returns
the type names quark or 0
g_type_from_name ()
GType
g_type_from_name (const gchar *name);
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
g_type_parent ()
GType
g_type_parent (GType 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.
g_type_depth ()
guint
g_type_depth (GType type);
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
g_type_next_base ()
GType
g_type_next_base (GType leaf_type,
GType root_type);
Given a leaf_type
and a root_type
which is contained in its
anchestry, 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 anchestor of leaf_type
g_type_is_a ()
gboolean
g_type_is_a (GType type,
GType is_a_type);
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
g_type_class_ref ()
gpointer
g_type_class_ref (GType 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
the GTypeClass
structure for the given type ID.
[type GObject.TypeClass][transfer none]
g_type_class_peek ()
gpointer
g_type_class_peek (GType 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
the GTypeClass
structure for the given type ID or NULL if the class does not
currently exist.
[type GObject.TypeClass][transfer none]
g_type_class_peek_static ()
gpointer
g_type_class_peek_static (GType type);
A more efficient version of g_type_class_peek() which works only for
static types.
Returns
the GTypeClass
structure for the given type ID or NULL if the class does not
currently exist or is dynamically loaded.
[type GObject.TypeClass][transfer none]
Since: 2.4
g_type_class_unref ()
void
g_type_class_unref (gpointer g_class);
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.
g_type_class_peek_parent ()
gpointer
g_type_class_peek_parent (gpointer g_class);
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
the parent class
of g_class
.
[type GObject.TypeClass][transfer none]
g_type_class_add_private ()
void
g_type_class_add_private (gpointer g_class,
gsize private_size);
g_type_class_add_private has been deprecated since version 2.58 and should not be used in newly-written code.
Use the G_ADD_PRIVATE() macro with the G_DEFINE_*
family of macros to add instance private data to a type
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().
Since: 2.4
g_type_add_class_private ()
void
g_type_add_class_private (GType class_type,
gsize private_size);
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
g_type_interface_peek ()
gpointer
g_type_interface_peek (gpointer instance_class,
GType iface_type);
Returns the GTypeInterface structure of an interface to which the
passed in class conforms.
Returns
the GTypeInterface
structure of iface_type
if implemented by instance_class
, NULL
otherwise.
[type GObject.TypeInterface][transfer none]
g_type_interface_peek_parent ()
gpointer
g_type_interface_peek_parent (gpointer g_iface);
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
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.
[transfer none][type GObject.TypeInterface]
g_type_default_interface_ref ()
gpointer
g_type_default_interface_ref (GType g_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 initalized 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.
Returns
the default
vtable for the interface; call g_type_default_interface_unref()
when you are done using the interface.
[type GObject.TypeInterface][transfer none]
Since: 2.4
g_type_default_interface_peek ()
gpointer
g_type_default_interface_peek (GType g_type);
If the interface type g_type
is currently in use, returns its
default interface vtable.
Returns
the default
vtable for the interface, or NULL if the type is not currently
in use.
[type GObject.TypeInterface][transfer none]
Since: 2.4
g_type_default_interface_unref ()
void
g_type_default_interface_unref (gpointer g_iface);
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
g_type_children ()
GType *
g_type_children (GType type,
guint *n_children);
Return a newly allocated and 0-terminated array of type IDs, listing
the child types of type
.
Returns
Newly allocated
and 0-terminated array of child types, free with g_free().
[array length=n_children][transfer full]
g_type_interfaces ()
GType *
g_type_interfaces (GType type,
guint *n_interfaces);
Return a newly allocated and 0-terminated array of type IDs, listing
the interface types that type
conforms to.
Returns
Newly allocated
and 0-terminated array of interface types, free with g_free().
[array length=n_interfaces][transfer full]
g_type_interface_prerequisites ()
GType *
g_type_interface_prerequisites (GType interface_type,
guint *n_prerequisites);
Returns the prerequisites of an interfaces type.
Returns
a
newly-allocated zero-terminated array of GType containing
the prerequisites of interface_type
.
[array length=n_prerequisites][transfer full]
Since: 2.2
g_type_set_qdata ()
void
g_type_set_qdata (GType type,
GQuark quark,
gpointer data);
Attaches arbitrary data to a type.
g_type_get_qdata ()
gpointer
g_type_get_qdata (GType type,
GQuark quark);
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
the data, or NULL if no data was found.
[transfer none]
g_type_query ()
void
g_type_query (GType type,
GTypeQuery *query);
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.
GBaseInitFunc ()
void
(*GBaseInitFunc) (gpointer g_class);
A callback function used by the type system to do base initialization
of the class structures of derived types. It is called as part of the
initialization process of all derived classes and should reallocate
or reset all dynamic class members copied over from the parent class.
For example, class members (such as strings) that are not sufficiently
handled by a plain memory copy of the parent class into the derived class
have to be altered. See GClassInitFunc() for a discussion of the class
initialization process.
GBaseFinalizeFunc ()
void
(*GBaseFinalizeFunc) (gpointer g_class);
A callback function used by the type system to finalize those portions
of a derived types class structure that were setup from the corresponding
GBaseInitFunc() function. Class finalization basically works the inverse
way in which class initialization is performed.
See GClassInitFunc() for a discussion of the class initialization process.
GClassInitFunc ()
void
(*GClassInitFunc) (gpointer g_class,
gpointer class_data);
A callback function used by the type system to initialize the class
of a specific type. This function should initialize all static class
members.
The initialization process of a class involves:
Copying common members from the parent class over to the
derived class structure.
Zero initialization of the remaining members not copied
over from the parent class.
Invocation of the GBaseInitFunc() initializers of all parent
types and the class' type.
Invocation of the class' GClassInitFunc() initializer.
Since derived classes are partially initialized through a memory copy
of the parent class, the general rule is that GBaseInitFunc() and
GBaseFinalizeFunc() should take care of necessary reinitialization
and release of those class members that were introduced by the type
that specified these GBaseInitFunc()/GBaseFinalizeFunc().
GClassInitFunc() should only care about initializing static
class members, while dynamic class members (such as allocated strings
or reference counted resources) are better handled by a GBaseInitFunc()
for this type, so proper initialization of the dynamic class members
is performed for class initialization of derived types as well.
An example may help to correspond the intend of the different class
initializers:
Initialization of TypeBClass will first cause initialization of
TypeAClass (derived classes reference their parent classes, see
g_type_class_ref() on this).
Initialization of TypeAClass roughly involves zero-initializing its fields,
then calling its GBaseInitFunc() type_a_base_class_init() to allocate
its dynamic members (dynamic_string), and finally calling its GClassInitFunc()
type_a_class_init() to initialize its static members (static_integer).
The first step in the initialization process of TypeBClass is then
a plain memory copy of the contents of TypeAClass into TypeBClass and
zero-initialization of the remaining fields in TypeBClass.
The dynamic members of TypeAClass within TypeBClass now need
reinitialization which is performed by calling type_a_base_class_init()
with an argument of TypeBClass.
After that, the GBaseInitFunc() of TypeBClass, type_b_base_class_init()
is called to allocate the dynamic members of TypeBClass (dynamic_gstring),
and finally the GClassInitFunc() of TypeBClass, type_b_class_init(),
is called to complete the initialization process with the static members
(static_float).
Corresponding finalization counter parts to the GBaseInitFunc() functions
have to be provided to release allocated resources at class finalization
time.
GClassFinalizeFunc ()
void
(*GClassFinalizeFunc) (gpointer g_class,
gpointer class_data);
A callback function used by the type system to finalize a class.
This function is rarely needed, as dynamically allocated class resources
should be handled by GBaseInitFunc() and GBaseFinalizeFunc().
Also, specification of a GClassFinalizeFunc() in the GTypeInfo
structure of a static type is invalid, because classes of static types
will never be finalized (they are artificially kept alive when their
reference count drops to zero).
GInstanceInitFunc ()
void
(*GInstanceInitFunc) (GTypeInstance *instance,
gpointer g_class);
A callback function used by the type system to initialize a new
instance of a type. This function initializes all instance members and
allocates any resources required by it.
Initialization of a derived instance involves calling all its parent
types instance initializers, so the class member of the instance
is altered during its initialization to always point to the class that
belongs to the type the current initializer was introduced for.
The extended members of instance
are guaranteed to have been filled with
zeros before this function is called.
GInterfaceInitFunc ()
void
(*GInterfaceInitFunc) (gpointer g_iface,
gpointer iface_data);
A callback function used by the type system to initialize a new
interface. This function should initialize all internal data and
allocate any resources required by the interface.
The members of iface_data
are guaranteed to have been filled with
zeros before this function is called.
GInterfaceFinalizeFunc ()
void
(*GInterfaceFinalizeFunc) (gpointer g_iface,
gpointer iface_data);
A callback function used by the type system to finalize an interface.
This function should destroy any internal data and release any resources
allocated by the corresponding GInterfaceInitFunc() function.
GTypeClassCacheFunc ()
gboolean
(*GTypeClassCacheFunc) (gpointer cache_data,
GTypeClass *g_class);
A callback function which is called when the reference count of a class
drops to zero. It may use g_type_class_ref() to prevent the class from
being freed. You should not call g_type_class_unref() from a
GTypeClassCacheFunc function to prevent infinite recursion, use
g_type_class_unref_uncached() instead.
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.
g_type_register_static ()
GType
g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info,
GTypeFlags flags);
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
g_type_register_static_simple ()
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);
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().
[skip]
Returns
the new type identifier
Since: 2.12
g_type_register_dynamic ()
GType
g_type_register_dynamic (GType parent_type,
const gchar *type_name,
GTypePlugin *plugin,
GTypeFlags flags);
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
g_type_register_fundamental ()
GType
g_type_register_fundamental (GType type_id,
const gchar *type_name,
const GTypeInfo *info,
const GTypeFundamentalInfo *finfo,
GTypeFlags flags);
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
g_type_add_interface_static ()
void
g_type_add_interface_static (GType instance_type,
GType interface_type,
const GInterfaceInfo *info);
Adds interface_type
to the static instantiable_type
.
The information contained in the GInterfaceInfo structure
pointed to by info
is used to manage the relationship.
g_type_add_interface_dynamic ()
void
g_type_add_interface_dynamic (GType instance_type,
GType interface_type,
GTypePlugin *plugin);
Adds interface_type
to the dynamic instantiable_type
. The information
contained in the GTypePlugin structure pointed to by plugin
is used to manage the relationship.
g_type_interface_add_prerequisite ()
void
g_type_interface_add_prerequisite (GType interface_type,
GType prerequisite_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.
g_type_get_plugin ()
GTypePlugin *
g_type_get_plugin (GType type);
Returns the GTypePlugin structure for type
.
Returns
the corresponding plugin
if type
is a dynamic type, NULL otherwise.
[transfer none]
g_type_interface_get_plugin ()
GTypePlugin *
g_type_interface_get_plugin (GType instance_type,
GType 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
the GTypePlugin for the dynamic
interface interface_type
of instance_type
.
[transfer none]
g_type_fundamental_next ()
GType
g_type_fundamental_next (void);
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
g_type_fundamental ()
GType
g_type_fundamental (GType type_id);
Internal function, used to extract the fundamental type ID portion.
Use G_TYPE_FUNDAMENTAL() instead.
Returns
fundamental type ID
g_type_create_instance ()
GTypeInstance *
g_type_create_instance (GType type);
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
implementators 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.
[skip]
Returns
an allocated and initialized instance, subject to further
treatment by the fundamental type implementation
g_type_free_instance ()
void
g_type_free_instance (GTypeInstance *instance);
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.
g_type_add_class_cache_func ()
void
g_type_add_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func);
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.
[skip]
g_type_class_unref_uncached ()
void
g_type_class_unref_uncached (gpointer g_class);
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.
[skip]
g_type_add_interface_check ()
void
g_type_add_interface_check (gpointer check_data,
GTypeInterfaceCheckFunc check_func);
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.
[skip]
Since: 2.4
GTypeInterfaceCheckFunc ()
void
(*GTypeInterfaceCheckFunc) (gpointer check_data,
gpointer g_iface);
A callback called after an interface vtable is initialized.
See g_type_add_interface_check().
Since: 2.4
g_type_value_table_peek ()
GTypeValueTable *
g_type_value_table_peek (GType type);
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
.
[skip]
g_type_ensure ()
void
g_type_ensure (GType type);
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
g_type_get_type_registration_serial ()
guint
g_type_get_type_registration_serial (void);
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.
Returns
An unsigned int, representing the state of type registrations
Since: 2.36
g_type_get_instance_count ()
int
g_type_get_instance_count (GType type);
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
G_DECLARE_FINAL_TYPE()
#define G_DECLARE_FINAL_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName)
A convenience macro for emitting the usual declarations in the header file for a type which is not (at the
present time) intended to be subclassed.
You might use it in a header as follows:
This results in the following things happening:
the usual my_app_window_get_type() function is declared with a return type of GType
the MyAppWindow types is defined as a typedef of struct _MyAppWindow. The struct itself is not
defined and should be defined from the .c file before G_DEFINE_TYPE() is used.
the MY_APP_WINDOW() cast is emitted as static inline function along with the MY_APP_IS_WINDOW() type
checking function
the MyAppWindowClass type is defined as a struct containing GtkWindowClass. This is done for the
convenience of the person defining the type and should not be considered to be part of the ABI. In
particular, without a firm declaration of the instance structure, it is not possible to subclass the type
and therefore the fact that the size of the class structure is exposed is not a concern and it can be
freely changed at any point in the future.
g_autoptr() support being added for your type, based on the type of your parent class
You can only use this function if your parent type also supports g_autoptr().
Because the type macro (MY_APP_TYPE_WINDOW in the above example) is not a callable, you must continue to
manually define this as a macro for yourself.
The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
to be used in the usual way with export control and API versioning macros.
If you want to declare your own class structure, use G_DECLARE_DERIVABLE_TYPE().
If you are writing a library, it is important to note that it is possible to convert a type from using
G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
reorder items without breaking the API and/or ABI.
Since: 2.44
G_DECLARE_DERIVABLE_TYPE()
#define G_DECLARE_DERIVABLE_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName)
A convenience macro for emitting the usual declarations in the
header file for a type which is intended to be subclassed.
You might use it in a header as follows:
This results in the following things happening:
the usual gtk_frobber_get_type() function is declared with a return type of GType
the GtkFrobber struct is created with GtkWidget as the first and only item. You are expected to use
a private structure from your .c file to store your instance variables.
the GtkFrobberClass type is defined as a typedef to struct _GtkFrobberClass, which is left undefined.
You should do this from the header file directly after you use the macro.
the GTK_FROBBER() and GTK_FROBBER_CLASS() casts are emitted as static inline functions along with
the GTK_IS_FROBBER() and GTK_IS_FROBBER_CLASS() type checking functions and GTK_FROBBER_GET_CLASS()
function.
g_autoptr() support being added for your type, based on the type of your parent class
You can only use this function if your parent type also supports g_autoptr().
Because the type macro (GTK_TYPE_FROBBER in the above example) is not a callable, you must continue to
manually define this as a macro for yourself.
The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
to be used in the usual way with export control and API versioning macros.
If you are writing a library, it is important to note that it is possible to convert a type from using
G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
reorder items without breaking the API and/or ABI. If you want to declare your own class structure, use
G_DECLARE_DERIVABLE_TYPE(). If you want to declare a class without exposing the class or instance
structures, use G_DECLARE_FINAL_TYPE().
If you must use G_DECLARE_DERIVABLE_TYPE() you should be sure to include some padding at the bottom of your
class structure to leave space for the addition of future virtual functions.
Since: 2.44
G_DECLARE_INTERFACE()
#define G_DECLARE_INTERFACE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, PrerequisiteName)
A convenience macro for emitting the usual declarations in the header file for a GInterface type.
You might use it in a header as follows:
This results in the following things happening:
the usual my_model_get_type() function is declared with a return type of GType
the MyModelInterface type is defined as a typedef to struct _MyModelInterface,
which is left undefined. You should do this from the header file directly after
you use the macro.
the MY_MODEL() cast is emitted as static inline functions along with
the MY_IS_MODEL() type checking function and MY_MODEL_GET_IFACE() function.
g_autoptr() support being added for your type, based on your prerequisite type.
You can only use this function if your prerequisite type also supports g_autoptr().
Because the type macro (MY_TYPE_MODEL in the above example) is not a callable, you must continue to
manually define this as a macro for yourself.
The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
to be used in the usual way with export control and API versioning macros.
Since: 2.44
G_DEFINE_TYPE()
#define G_DEFINE_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, {})
A convenience macro for type implementations, which declares a class
initialization function, an instance initialization function (see GTypeInfo
for information about these) and a static variable named t_n_parent_class
pointing to the parent class. Furthermore, it defines a *_get_type() function.
See G_DEFINE_TYPE_EXTENDED() for an example.
Since: 2.4
G_DEFINE_TYPE_WITH_PRIVATE()
#define G_DEFINE_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, G_ADD_PRIVATE (TN))
A convenience macro for type implementations, which declares a class
initialization function, an instance initialization function (see GTypeInfo
for information about these), a static variable named t_n_parent_class
pointing to the parent class, and adds private instance data to the type.
Furthermore, it defines a *_get_type() function. See G_DEFINE_TYPE_EXTENDED()
for an example.
Note that private structs added with this macros must have a struct
name of the form TN
Private.
The private instance data can be retrieved using the automatically generated
getter function t_n_get_instance_private().
See also: G_ADD_PRIVATE()
Since: 2.38
G_DEFINE_TYPE_WITH_CODE()
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
A convenience macro for type implementations.
Similar to G_DEFINE_TYPE(), but allows you to insert custom code into the
*_get_type() function, e.g. interface implementations via G_IMPLEMENT_INTERFACE().
See G_DEFINE_TYPE_EXTENDED() for an example.
Since: 2.4
G_DEFINE_ABSTRACT_TYPE()
#define G_DEFINE_ABSTRACT_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, {})
A convenience macro for type implementations.
Similar to G_DEFINE_TYPE(), but defines an abstract type.
See G_DEFINE_TYPE_EXTENDED() for an example.
Since: 2.4
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE()
#define G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, G_ADD_PRIVATE (TN))
Similar to G_DEFINE_TYPE_WITH_PRIVATE(), but defines an abstract type.
See G_DEFINE_TYPE_EXTENDED() for an example.
Since: 2.38
G_DEFINE_ABSTRACT_TYPE_WITH_CODE()
#define G_DEFINE_ABSTRACT_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
A convenience macro for type implementations.
Similar to G_DEFINE_TYPE_WITH_CODE(), but defines an abstract type and
allows you to insert custom code into the *_get_type() function, e.g.
interface implementations via G_IMPLEMENT_INTERFACE().
See G_DEFINE_TYPE_EXTENDED() for an example.
Since: 2.4
G_ADD_PRIVATE()
#define G_ADD_PRIVATE(TypeName)
A convenience macro to ease adding private data to instances of a new type
in the _C_
section of G_DEFINE_TYPE_WITH_CODE() or
G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
For instance:
Will add MyObjectPrivate as the private data to any instance of the MyObject
type.
G_DEFINE_TYPE_* macros will automatically create a private function
based on the arguments to this macro, which can be used to safely
retrieve the private data from an instance of the type; for instance:
Note that this macro can only be used together with the G_DEFINE_TYPE_*
macros, since it depends on variable names from those macros.
Also note that private structs added with these macros must have a struct
name of the form TypeNamePrivate.
It is safe to call the _get_instance_private function on NULL or invalid
objects since it's only adding an offset to the instance pointer. In that
case the returned pointer must not be dereferenced.
Since: 2.38
G_PRIVATE_OFFSET()
#define G_PRIVATE_OFFSET(TypeName, field)
Evaluates to the offset of the field
inside the instance private data
structure for TypeName
.
Note that this macro can only be used together with the G_DEFINE_TYPE_*
and G_ADD_PRIVATE() macros, since it depends on variable names from
those macros.
Since: 2.38
G_PRIVATE_FIELD()
#define G_PRIVATE_FIELD(TypeName, inst, field_type, field_name)
Evaluates to the field_name
inside the inst
private data
structure for TypeName
.
Note that this macro can only be used together with the G_DEFINE_TYPE_*
and G_ADD_PRIVATE() macros, since it depends on variable names from
those macros.
Since: 2.38
G_PRIVATE_FIELD_P()
#define G_PRIVATE_FIELD_P(TypeName, inst, field_name)
Evaluates to a pointer to the field_name
inside the inst
private data
structure for TypeName
.
Note that this macro can only be used together with the G_DEFINE_TYPE_*
and G_ADD_PRIVATE() macros, since it depends on variable names from
those macros.
Since: 2.38
G_DEFINE_INTERFACE()
#define G_DEFINE_INTERFACE(TN, t_n, T_P) G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, ;)
A convenience macro for GTypeInterface definitions, which declares
a default vtable initialization function and defines a *_get_type()
function.
The macro expects the interface initialization function to have the
name t_n ## _default_init, and the interface structure to have the
name TN ## Interface.
The initialization function has signature
static void t_n ## _default_init (TypeName##Interface *klass);, rather than
the full GInterfaceInitFunc signature, for brevity and convenience. If you
need to use an initialization function with an iface_data argument, you
must write the GTypeInterface definitions manually.
Since: 2.24
G_DEFINE_TYPE_EXTENDED()
#define G_DEFINE_TYPE_EXTENDED(TN, t_n, T_P, _f_, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, _f_) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
The most general convenience macro for type implementations, on which
G_DEFINE_TYPE(), etc are based.
expands to
The only pieces which have to be manually provided are the definitions of
the instance and class structure and the definitions of the instance and
class init functions.
Since: 2.4
G_DEFINE_BOXED_TYPE()
#define G_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func) G_DEFINE_BOXED_TYPE_WITH_CODE (TypeName, type_name, copy_func, free_func, {})
A convenience macro for boxed type implementations, which defines a
type_name_get_type() function registering the boxed type.
Since: 2.26
G_DEFINE_BOXED_TYPE_WITH_CODE()
#define G_DEFINE_BOXED_TYPE_WITH_CODE(TypeName, type_name, copy_func, free_func, _C_) _G_DEFINE_BOXED_TYPE_BEGIN (TypeName, type_name, copy_func, free_func) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
A convenience macro for boxed type implementations.
Similar to G_DEFINE_BOXED_TYPE(), but allows to insert custom code into the
type_name_get_type() function, e.g. to register value transformations with
g_value_register_transform_func(), for instance:
Similarly to the G_DEFINE_TYPE family of macros, the GType of the newly
defined boxed type is exposed in the g_define_type_id variable.
Since: 2.26
G_DEFINE_POINTER_TYPE()
#define G_DEFINE_POINTER_TYPE(TypeName, type_name) G_DEFINE_POINTER_TYPE_WITH_CODE (TypeName, type_name, {})
A convenience macro for pointer type implementations, which defines a
type_name_get_type() function registering the pointer type.
Since: 2.26
G_DEFINE_POINTER_TYPE_WITH_CODE()
#define G_DEFINE_POINTER_TYPE_WITH_CODE(TypeName, type_name, _C_) _G_DEFINE_POINTER_TYPE_BEGIN (TypeName, type_name) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
A convenience macro for pointer type implementations.
Similar to G_DEFINE_POINTER_TYPE(), but allows to insert
custom code into the type_name_get_type() function.
Since: 2.26
Types and Values
GType
A numerical value which represents the unique identifier of a registered
type.
G_TYPE_FUNDAMENTAL_MAX
#define G_TYPE_FUNDAMENTAL_MAX (255 << G_TYPE_FUNDAMENTAL_SHIFT)
An integer constant that represents the number of identifiers reserved
for types that are assigned at compile-time.
struct GTypeInterface
struct GTypeInterface {
};
An opaque structure used as the base of all interface types.
struct GTypeInstance
struct GTypeInstance {
};
An opaque structure used as the base of all type instances.
struct GTypeClass
struct GTypeClass {
};
An opaque structure used as the base of all classes.
struct GTypeInfo
struct GTypeInfo {
/* interface types, classed types, instantiated types */
guint16 class_size;
GBaseInitFunc base_init;
GBaseFinalizeFunc base_finalize;
/* interface types, classed types, instantiated types */
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
/* instantiated types */
guint16 instance_size;
guint16 n_preallocs;
GInstanceInitFunc instance_init;
/* value handling */
const GTypeValueTable *value_table;
};
This structure is used to provide the type system with the information
required to initialize and destruct (finalize) a type's class and
its instances.
The initialized structure is passed to the g_type_register_static() function
(or is copied into the provided GTypeInfo structure in the
g_type_plugin_complete_type_info()). The type system will perform a deep
copy of this structure, so its memory does not need to be persistent
across invocation of g_type_register_static().
struct GTypeFundamentalInfo
struct GTypeFundamentalInfo {
GTypeFundamentalFlags type_flags;
};
A structure that provides information to the type system which is
used specifically for managing fundamental types.
struct GInterfaceInfo
struct GInterfaceInfo {
GInterfaceInitFunc interface_init;
GInterfaceFinalizeFunc interface_finalize;
gpointer interface_data;
};
A structure that provides information to the type system which is
used specifically for managing interface types.
struct GTypeValueTable
struct GTypeValueTable {
void (*value_init) (GValue *value);
void (*value_free) (GValue *value);
void (*value_copy) (const GValue *src_value,
GValue *dest_value);
/* varargs functionality (optional) */
gpointer (*value_peek_pointer) (const GValue *value);
const gchar *collect_format;
gchar* (*collect_value) (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
const gchar *lcopy_format;
gchar* (*lcopy_value) (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
};
The GTypeValueTable provides the functions required by the GValue
implementation, to serve as a container for values of a type.
G_TYPE_FLAG_RESERVED_ID_BIT
#define G_TYPE_FLAG_RESERVED_ID_BIT ((GType) (1 << 0))
A bit in the type number that's supposed to be left untouched.
enum GTypeDebugFlags
GTypeDebugFlags has been deprecated since version 2.36 and should not be used in newly-written code.
g_type_init() is now done automatically
These flags used to be passed to g_type_init_with_debug_flags() which
is now deprecated.
If you need to enable debugging features, use the GOBJECT_DEBUG
environment variable.
struct GTypeQuery
struct GTypeQuery {
GType type;
const gchar *type_name;
guint class_size;
guint instance_size;
};
A structure holding information for a specific type.
It is filled in by the g_type_query() function.
enum GTypeFlags
Bit masks used to check or determine characteristics of a type.
enum GTypeFundamentalFlags
Bit masks used to check or determine specific characteristics of a
fundamental type.
G_TYPE_INVALID
#define G_TYPE_INVALID G_TYPE_MAKE_FUNDAMENTAL (0)
An invalid GType used as error return value in some functions which return
a GType.
G_TYPE_NONE
#define G_TYPE_NONE G_TYPE_MAKE_FUNDAMENTAL (1)
A fundamental type which is used as a replacement for the C
void return type.
G_TYPE_INTERFACE
#define G_TYPE_INTERFACE G_TYPE_MAKE_FUNDAMENTAL (2)
The fundamental type from which all interfaces are derived.
G_TYPE_CHAR
#define G_TYPE_CHAR G_TYPE_MAKE_FUNDAMENTAL (3)
The fundamental type corresponding to gchar.
The type designated by G_TYPE_CHAR is unconditionally an 8-bit signed integer.
This may or may not be the same type a the C type "gchar".
G_TYPE_UCHAR
#define G_TYPE_UCHAR G_TYPE_MAKE_FUNDAMENTAL (4)
The fundamental type corresponding to guchar.
G_TYPE_BOOLEAN
#define G_TYPE_BOOLEAN G_TYPE_MAKE_FUNDAMENTAL (5)
The fundamental type corresponding to gboolean.
G_TYPE_INT
#define G_TYPE_INT G_TYPE_MAKE_FUNDAMENTAL (6)
The fundamental type corresponding to gint.
G_TYPE_UINT
#define G_TYPE_UINT G_TYPE_MAKE_FUNDAMENTAL (7)
The fundamental type corresponding to guint.
G_TYPE_LONG
#define G_TYPE_LONG G_TYPE_MAKE_FUNDAMENTAL (8)
The fundamental type corresponding to glong.
G_TYPE_ULONG
#define G_TYPE_ULONG G_TYPE_MAKE_FUNDAMENTAL (9)
The fundamental type corresponding to gulong.
G_TYPE_INT64
#define G_TYPE_INT64 G_TYPE_MAKE_FUNDAMENTAL (10)
The fundamental type corresponding to gint64.
G_TYPE_UINT64
#define G_TYPE_UINT64 G_TYPE_MAKE_FUNDAMENTAL (11)
The fundamental type corresponding to guint64.
G_TYPE_ENUM
#define G_TYPE_ENUM G_TYPE_MAKE_FUNDAMENTAL (12)
The fundamental type from which all enumeration types are derived.
G_TYPE_FLAGS
#define G_TYPE_FLAGS G_TYPE_MAKE_FUNDAMENTAL (13)
The fundamental type from which all flags types are derived.
G_TYPE_FLOAT
#define G_TYPE_FLOAT G_TYPE_MAKE_FUNDAMENTAL (14)
The fundamental type corresponding to gfloat.
G_TYPE_DOUBLE
#define G_TYPE_DOUBLE G_TYPE_MAKE_FUNDAMENTAL (15)
The fundamental type corresponding to gdouble.
G_TYPE_STRING
#define G_TYPE_STRING G_TYPE_MAKE_FUNDAMENTAL (16)
The fundamental type corresponding to nul-terminated C strings.
G_TYPE_POINTER
#define G_TYPE_POINTER G_TYPE_MAKE_FUNDAMENTAL (17)
The fundamental type corresponding to gpointer.
G_TYPE_BOXED
#define G_TYPE_BOXED G_TYPE_MAKE_FUNDAMENTAL (18)
The fundamental type from which all boxed types are derived.
G_TYPE_PARAM
#define G_TYPE_PARAM G_TYPE_MAKE_FUNDAMENTAL (19)
The fundamental type from which all GParamSpec types are derived.
G_TYPE_OBJECT
#define G_TYPE_OBJECT G_TYPE_MAKE_FUNDAMENTAL (20)
The fundamental type for GObject.
G_TYPE_GTYPE
#define G_TYPE_GTYPE (g_gtype_get_type())
The type for GType.
G_TYPE_VARIANT
#define G_TYPE_VARIANT G_TYPE_MAKE_FUNDAMENTAL (21)
The fundamental type corresponding to GVariant.
All floating GVariant instances passed through the GType system are
consumed.
Note that callbacks in closures, and signal handlers
for signals of return type G_TYPE_VARIANT, must never return floating
variants.
Note: GLib 2.24 did include a boxed type with this name. It was replaced
with this fundamental type in 2.26.
Since: 2.26
G_TYPE_CHECKSUM
#define G_TYPE_CHECKSUM (g_checksum_get_type ())
The GType for a boxed type holding a GChecksum.
Since: 2.36
G_TYPE_RESERVED_GLIB_FIRST
#define G_TYPE_RESERVED_GLIB_FIRST (22)
First fundamental type number to create a new fundamental type id with
G_TYPE_MAKE_FUNDAMENTAL() reserved for GLib.
G_TYPE_RESERVED_GLIB_LAST
#define G_TYPE_RESERVED_GLIB_LAST (31)
Last fundamental type number reserved for GLib.
G_TYPE_RESERVED_BSE_FIRST
#define G_TYPE_RESERVED_BSE_FIRST (32)
First fundamental type number to create a new fundamental type id with
G_TYPE_MAKE_FUNDAMENTAL() reserved for BSE.
G_TYPE_RESERVED_BSE_LAST
#define G_TYPE_RESERVED_BSE_LAST (48)
Last fundamental type number reserved for BSE.
G_TYPE_RESERVED_USER_FIRST
#define G_TYPE_RESERVED_USER_FIRST (49)
First available fundamental type number to create new fundamental
type id with G_TYPE_MAKE_FUNDAMENTAL().