Document closures.

This commit is contained in:
Matthias Clasen 2003-10-14 00:37:18 +00:00
parent fce9dce6b3
commit 9d641fd17a
3 changed files with 543 additions and 103 deletions

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@ -1,3 +1,13 @@
Tue Oct 14 02:35:45 2003 Matthias Clasen <maclas@gmx.de>
* gobject/gobject-sections.txt: Move the g_cclosure_marshal_*
functions to a non-private subsection, since these functions
are not private.
Tue Oct 14 02:35:16 2003 Matthias Clasen <maclas@gmx.de>
* gobject/tmpl/gclosure.sgml: Fill in.
Sun Oct 5 23:23:53 2003 Matthias Clasen <maclas@gmx.de>
* gobject/glib-sections.txt:

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@ -688,7 +688,6 @@ G_TYPE_CLOSURE
GCClosure
GClosureMarshal
GClosureNotify
GClosureNotifyData
g_cclosure_new
g_cclosure_new_swap
g_cclosure_new_object
@ -711,7 +710,31 @@ g_source_set_closure
G_TYPE_IO_CHANNEL
G_TYPE_IO_CONDITION
<SUBSECTION>
g_cclosure_marshal_VOID__VOID
g_cclosure_marshal_VOID__BOOLEAN
g_cclosure_marshal_VOID__CHAR
g_cclosure_marshal_VOID__UCHAR
g_cclosure_marshal_VOID__INT
g_cclosure_marshal_VOID__UINT
g_cclosure_marshal_VOID__LONG
g_cclosure_marshal_VOID__ULONG
g_cclosure_marshal_VOID__ENUM
g_cclosure_marshal_VOID__FLAGS
g_cclosure_marshal_VOID__FLOAT
g_cclosure_marshal_VOID__DOUBLE
g_cclosure_marshal_VOID__STRING
g_cclosure_marshal_VOID__PARAM
g_cclosure_marshal_VOID__BOXED
g_cclosure_marshal_VOID__POINTER
g_cclosure_marshal_VOID__OBJECT
g_cclosure_marshal_STRING__OBJECT_POINTER
g_cclosure_marshal_VOID__UINT_POINTER
g_cclosure_marshal_BOOLEAN__FLAGS
g_cclosure_marshal_BOOL__FLAGS
<SUBSECTION Private>
GClosureNotifyData
g_closure_get_type
g_cclosure_marshal_VOID__VOID
g_cclosure_marshal_VOID__BOOLEAN

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@ -6,7 +6,20 @@ Functions as first-class objects
<!-- ##### SECTION Long_Description ##### -->
<para>
A #GClosure represents a callback supplied by the programmer. It will generally
comprise a function of some kind and a marshaller used to call it. It is the
reponsibility of the marshaller to convert the arguments for the invocation
from #GValue<!-- -->s into a suitable form, perform the callback on the
converted arguments, and transform the return value back into a #GValue.
</para>
<para>
In the case of C programs, a closure usually just holds a pointer to a function
and maybe a data argument, and the marshaller converts between #GValue<!-- -->
and native C types. The GObject library provides the #GCClosure type for this
purpose. Bindings for other languages need marshallers which
convert between #GValue<!-- -->s and suitable representations in the runtime
of the language in order to use functions written in that languages as
callbacks.
</para>
<!-- ##### SECTION See_Also ##### -->
@ -16,50 +29,62 @@ Functions as first-class objects
<!-- ##### MACRO G_CLOSURE_NEEDS_MARSHAL ##### -->
<para>
Returns %TRUE if a #GClosureMarshal marshaller has not yet been set on
@closure. See g_closure_set_marshal().
</para>
@closure:
@closure: a #GClosure
<!-- ##### MACRO G_CLOSURE_N_NOTIFIERS ##### -->
<para>
Returns the total number of notifiers connected with the closure @cl.
The count includes the meta marshaller, the finalize and invalidate notifiers
and the marshal guards. Note that each guard counts as two notifiers.
See g_closure_set_meta_marshal(), g_closure_add_finalize_notifier(),
g_closure_add_invalidate_notifier() and g_closure_add_marshal_guards().
</para>
@cl:
@cl: a #GClosure
<!-- ##### MACRO G_CCLOSURE_SWAP_DATA ##### -->
<para>
Returns whether the user data of the #GCClosure should be passed as the
first parameter to the callback. See g_cclosure_new_swap().
</para>
@cclosure:
@cclosure: a #GCClosure
<!-- ##### MACRO G_CALLBACK ##### -->
<para>
Cast a function pointer to a #GCallback.
</para>
@f:
@f: a function pointer.
<!-- ##### USER_FUNCTION GCallback ##### -->
<para>
The type used for callback functions in structure definitions and function
signatures. This doesn't mean that all callback functions must take no
parameters and return void. The required signature of a callback function
is determined by the context in which is used (e.g. the signal to which it
is connected). Use G_CALLBACK() to cast the callback function to a #GCallback.
</para>
<!-- ##### STRUCT GClosure ##### -->
<para>
A #GClosure represents a callback supplied by the programmer.
</para>
@in_marshal:
@is_invalid: Indicates whether the closure has been invalidated by g_closure_invalidate()
@in_marshal: Indicates whether the closure is currently being invoked with
g_closure_invoke()
@is_invalid: Indicates whether the closure has been invalidated by
g_closure_invalidate()
<!-- ##### MACRO G_TYPE_CLOSURE ##### -->
<para>
@ -70,97 +95,107 @@ The #GType for #GClosure.
<!-- ##### STRUCT GCClosure ##### -->
<para>
A #GCClosure is a specialization of #GClosure for C function callbacks.
</para>
@closure:
@callback:
@closure: the #GClosure
@callback: the callback function
<!-- ##### USER_FUNCTION GClosureMarshal ##### -->
<para>
The type used for marshaller functions.
</para>
@closure:
@return_value:
@n_param_values:
@param_values:
@invocation_hint:
@marshal_data:
@closure: the #GClosure to which the marshaller belongs
@return_value: a #GValue to store the return value. May be %NULL if the
callback of @closure doesn't return a value.
@n_param_values: the length of the @param_values array
@param_values: an array of #GValue<!-- -->s holding the arguments on
which to invoke the callback of @closure
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller,
see g_closure_set_marshal() and g_closure_set_meta_marshal()
<!-- ##### USER_FUNCTION GClosureNotify ##### -->
<para>
The type used for the various notification callbacks which can be registered
on closures.
</para>
@data:
@closure:
@data: data specified when registering the notification callback
@closure: the #GClosure on which the notification is emitted
<!-- ##### STRUCT GClosureNotifyData ##### -->
<para>
</para>
@data:
@notify:
<!-- ##### FUNCTION g_cclosure_new ##### -->
<para>
Creates a new closure which invokes @callback_func with @user_data as last
parameter.
</para>
@callback_func:
@user_data:
@destroy_data:
@Returns:
@callback_func: the function to invoke
@user_data: user data to pass to @callback_func
@destroy_data: destroy notify to be called when @user_data is destroyed
@Returns: a new #GCClosure
<!-- ##### FUNCTION g_cclosure_new_swap ##### -->
<para>
Creates a new closure which invokes @callback_func with @user_data as first
parameter.
</para>
@callback_func:
@user_data:
@destroy_data:
@Returns:
@callback_func: the function to invoke
@user_data: user data to pass to @callback_func
@destroy_data: destroy notify to be called when @user_data is destroyed
@Returns: a new #GCClosure
<!-- ##### FUNCTION g_cclosure_new_object ##### -->
<para>
A variant of g_cclosure_new() which uses @object as @user_data
and calls g_object_watch_closure() on @object and the
created closure. This function is mainly useful when implementing new types
of closures.
</para>
@callback_func:
@object:
@Returns:
@callback_func: the function to invoke
@object: a #GObject pointer to pass to @callback_func
@Returns: a new #GCClosure
<!-- ##### FUNCTION g_cclosure_new_object_swap ##### -->
<para>
A variant of g_cclosure_new_swap() which uses @object as @user_data
and calls g_object_watch_closure() on @object and the
created closure. This function is mainly useful when implementing new types
of closures.
</para>
@callback_func:
@object:
@Returns:
@callback_func: the function to invoke
@object: a #GObject pointer to pass to @callback_func
@Returns: a new #GCClosure
<!-- ##### FUNCTION g_closure_new_object ##### -->
<para>
A variant of g_closure_new_simple() which stores @object in the @data
field of the closure and calls g_object_watch_closure() on @object and the
created closure. This function is mainly useful when implementing new types
of closures.
</para>
@sizeof_closure:
@object:
@Returns:
@sizeof_closure: the size of the structure to allocate, must be at least
<literal>sizeof (GClosure)</literal>
@object: a #GObject pointer to store in the @data field of the newly
allocated #GClosure
@Returns: a newly allocated #GClosure
<!-- ##### FUNCTION g_closure_ref ##### -->
<para>
Increment the reference count on a closure to force it staying
Increments the reference count on a closure to force it staying
alive while the caller holds a pointer to it.
</para>
@ -170,7 +205,7 @@ alive while the caller holds a pointer to it.
<!-- ##### FUNCTION g_closure_sink ##### -->
<para>
Take over the initial ownership of a closure.
Takes over the initial ownership of a closure.
When closures are newly created, they get an initial reference count
of 1, eventhough no caller has yet invoked g_closure_ref() on the @closure.
Code entities that store closures for notification purposes are supposed
@ -201,7 +236,7 @@ g_closure_ref() should be called prior to this function.
<!-- ##### FUNCTION g_closure_unref ##### -->
<para>
Decrement the reference count of a closure after it was
Decrements the reference count of a closure after it was
previously incremented by the same caller. The closure
will most likely be destroyed and freed after this function
returns.
@ -212,25 +247,27 @@ returns.
<!-- ##### FUNCTION g_closure_invoke ##### -->
<para>
Invokes the closure.
</para>
@closure:
@return_value:
@n_param_values:
@param_values:
@invocation_hint:
@closure: a #GClosure
@return_value: a #GValue to store the return value. May be %NULL if the
callback of @closure doesn't return a value.
@n_param_values: the length of the @param_values array
@param_values: an array of #GValue<!-- -->s holding the arguments on
which to invoke the callback of @closure
@invocation_hint: a context-dependent invocation hint
<!-- ##### FUNCTION g_closure_invalidate ##### -->
<para>
This function sets a flag on the closure to indicate that it's
calling environment has become invalid, and thus causes any future
invocations of g_closure_invoke() on this @closure to be ignored.
Sets a flag on the closure to indicate that it's calling environment has
become invalid, and thus causes any future invocations of g_closure_invoke()
on this @closure to be ignored.
Also, invalidation notifiers installed on the closure will be called
at this point, and since invalidation notifiers may unreference
the closure, @closure should be considered an invalidated pointer
atfer this function, unles g_closure_ref() was called beforehand.
after this function, unless g_closure_ref() was called beforehand.
</para>
@closure: GClosure to invalidate
@ -238,83 +275,144 @@ atfer this function, unles g_closure_ref() was called beforehand.
<!-- ##### FUNCTION g_closure_add_finalize_notifier ##### -->
<para>
Registers a finalization notifier which will be called when the reference
count of @closure goes down to 0. Finalization notifiers are invoked after
invalidation notifiers, in an unspecified order.
</para>
@closure:
@notify_data:
@notify_func:
@closure: a #GClosure
@notify_data: data to pass to @notify_func
@notify_func: the callback function to register
<!-- ##### FUNCTION g_closure_add_invalidate_notifier ##### -->
<para>
Registers an invalidation notifier which will be called when the @closure
is invalidated with g_closure_invalidate(). Invalidation notifiers are
invoked before finalization notifiers, in an unspecified order.
</para>
@closure:
@notify_data:
@notify_func:
@closure: a #GClosure
@notify_data: data to pass to @notify_func
@notify_func: the callback function to register
<!-- ##### FUNCTION g_closure_remove_finalize_notifier ##### -->
<para>
Removes a finalization notifier. Notifiers may only be removed before or
during their invocation.
</para>
@closure:
@notify_data:
@notify_func:
@closure: a #GClosure
@notify_data: data which was passed to g_closure_add_finalize_notifier()
when registering @notify_func
@notify_func: the callback function to remove
<!-- ##### FUNCTION g_closure_remove_invalidate_notifier ##### -->
<para>
Removes a invalidation notifier. Notifiers may only be removed before or
during their invocation.
</para>
@closure:
@notify_data:
@notify_func:
@closure: a #GClosure
@notify_data: data which was passed to g_closure_add_invalidate_notifier()
when registering @notify_func
@notify_func: the callback function to remove
<!-- ##### FUNCTION g_closure_new_simple ##### -->
<para>
Allocates a struct of the given size and initializes the initial part
as a #GClosure. This function is mainly useful when implementing new types
of closures.
</para>
<informalexample>
<programlisting>
typedef struct _MyClosure MyClosure;
struct _MyClosure
{
GClosure closure;
/* extra data goes here */
};
@sizeof_closure:
@data:
@Returns:
static void
my_closure_finalize (gpointer notify_data,
GClosure *closure)
{
MyClosure *my_closure = (MyClosure *)closure;
/* free extra data here */
}
MyClosure *my_closure_new (gpointer data)
{
GClosure *closure;
MyClosure *my_closure;
closure = g_closure_new_simple (sizeof (MyClosure), data);
my_closure = (MyClosure *) closure;
/ initialize extra data here */
g_closure_add_finalize_notifier (closure, notify_data,
my_closure_finalize);
return my_closure;
}
</programlisting>
</informalexample>
@sizeof_closure: the size of the structure to allocate, must be at least
<literal>sizeof (GClosure)</literal>
@data: data to store in the @data field of the newly allocated #GClosure
@Returns: a newly allocated #GClosure
<!-- ##### FUNCTION g_closure_set_marshal ##### -->
<para>
Sets the marshaller of @closure. A marshaller set with g_closure_set_marshal()
should interpret its @marshal_data argument as a callback function to be
invoked instead of @closure->callback, provided it is not %NULL. GObject provides a number of predefined marshallers for use with #GCClosure<!-- -->s,
see the g_cclosure_marshal_*() functions.
</para>
@closure:
@marshal:
@closure: a #GClosure
@marshal: a #GClosureMarshal function
<!-- ##### FUNCTION g_closure_add_marshal_guards ##### -->
<para>
Adds a pair of notifiers which get invoked before and after the closure
callback, respectively. See g_object_watch_closure() for a use of marshal
guards.
</para>
@closure:
@pre_marshal_data:
@pre_marshal_notify:
@post_marshal_data:
@post_marshal_notify:
@closure: a #GClosure
@pre_marshal_data: data to pass to @pre_marshal_notify
@pre_marshal_notify: a function to call before the closure callback
@post_marshal_data: data to pass to @post_marshal_notify
@post_marshal_notify: a function to call after the closure callback
<!-- ##### FUNCTION g_closure_set_meta_marshal ##### -->
<para>
Sets the meta marshaller of @closure. A meta marshaller
should use its @marshal_data argument together with @closure->data
to determine the callback function to use, and pass it as @marshal_data
to @closure->marshal.
</para>
<para>
As an example for the use of a meta marshaller, consider a closure whose
@data member contains a pointer to a class structure. The meta marshaller
could then be given an offset into this struct in @marshal_data, and use
it to determine the class member function to use as callback. This is
how class closures for signals are actually implemented in GObject.
</para>
@closure:
@marshal_data:
@meta_marshal:
@closure: a #GClosure
@marshal_data: context-dependent data to pass to @meta_marshal
@meta_marshal: a #GClosureMarshal function
<!-- ##### FUNCTION g_source_set_closure ##### -->
@ -345,3 +443,312 @@ The #GType for #GIOCondition.
<!-- ##### FUNCTION g_cclosure_marshal_VOID__VOID ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 1
@param_values: a #GValue array holding only the instance
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__BOOLEAN ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gboolean arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gboolean parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__CHAR ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gchar arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gchar parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__UCHAR ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, guchar arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #guchar parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__INT ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gint parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__UINT ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, guint arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #guint parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__LONG ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, glong arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #glong parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__ULONG ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gulong arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gulong parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__ENUM ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter denotes an enumeration type..
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the enumeration parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__FLAGS ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter denotes a flags type
denotes a flags type.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the flags parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__FLOAT ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gfloat arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gfloat parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__DOUBLE ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gdouble arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gdouble parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__STRING ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, const gchar *arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gchar* parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__PARAM ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, GParamSpec *arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #GParamSpec* parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__BOXED ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, GBoxed *arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #GBoxed* parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__POINTER ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, gpointer arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #gpointer parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__OBJECT ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, GOBject *arg1, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 2
@param_values: a #GValue array holding the instance and the #GObject* parameter
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_STRING__OBJECT_POINTER ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, GObject *arg1, gpointer arg2, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 3
@param_values: a #GValue array holding instance, arg1 and arg2
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_VOID__UINT_POINTER ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>void (*callback) (gpointer instance, guint arg1, gpointer arg2, gpointer user_data)</literal>.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: ignored
@n_param_values: 3
@param_values: a #GValue array holding instance, arg1 and arg2
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### FUNCTION g_cclosure_marshal_BOOLEAN__FLAGS ##### -->
<para>
A marshaller for a #GCClosure with a callback of type
<literal>gboolean (*callback) (gpointer instance, gint arg1, gpointer user_data)</literal> where the #gint parameter
denotes a flags type.
</para>
@closure: the #GClosure to which the marshaller belongs
@return_value: a #GValue which can store the returned #gboolean
@n_param_values: 2
@param_values: a #GValue array holding instance and arg1
@invocation_hint: the invocation hint given as the the last argument
to g_closure_invoke()
@marshal_data: additional data specified when registering the marshaller
<!-- ##### MACRO g_cclosure_marshal_BOOL__FLAGS ##### -->
<para>
Another name for g_cclosure_marshal_BOOLEAN__FLAGS().
</para>