Closures

Closures — Functions as first-class objects

Functions

#define G_CLOSURE_NEEDS_MARSHAL()
#define G_CLOSURE_N_NOTIFIERS()
#define G_CCLOSURE_SWAP_DATA()
#define G_CALLBACK()
void (*GCallback) ()
#define G_TYPE_CLOSURE
void (*GClosureMarshal) ()
void (*GVaClosureMarshal) ()
void (*GClosureNotify) ()
GClosure * g_cclosure_new ()
GClosure * g_cclosure_new_swap ()
GClosure * g_cclosure_new_object ()
GClosure * g_cclosure_new_object_swap ()
void g_cclosure_marshal_generic ()
GClosure * g_closure_new_object ()
GClosure * g_closure_ref ()
void g_closure_sink ()
void g_closure_unref ()
void g_closure_invoke ()
void g_closure_invalidate ()
void g_closure_add_finalize_notifier ()
void g_closure_add_invalidate_notifier ()
void g_closure_remove_finalize_notifier ()
void g_closure_remove_invalidate_notifier ()
GClosure * g_closure_new_simple ()
void g_closure_set_marshal ()
void g_closure_add_marshal_guards ()
void g_closure_set_meta_marshal ()
void g_source_set_closure ()
void g_source_set_dummy_callback ()
void g_cclosure_marshal_VOID__VOID ()
void g_cclosure_marshal_VOID__BOOLEAN ()
void g_cclosure_marshal_VOID__CHAR ()
void g_cclosure_marshal_VOID__UCHAR ()
void g_cclosure_marshal_VOID__INT ()
void g_cclosure_marshal_VOID__UINT ()
void g_cclosure_marshal_VOID__LONG ()
void g_cclosure_marshal_VOID__ULONG ()
void g_cclosure_marshal_VOID__ENUM ()
void g_cclosure_marshal_VOID__FLAGS ()
void g_cclosure_marshal_VOID__FLOAT ()
void g_cclosure_marshal_VOID__DOUBLE ()
void g_cclosure_marshal_VOID__STRING ()
void g_cclosure_marshal_VOID__PARAM ()
void g_cclosure_marshal_VOID__BOXED ()
void g_cclosure_marshal_VOID__POINTER ()
void g_cclosure_marshal_VOID__OBJECT ()
void g_cclosure_marshal_VOID__VARIANT ()
void g_cclosure_marshal_STRING__OBJECT_POINTER ()
void g_cclosure_marshal_VOID__UINT_POINTER ()
void g_cclosure_marshal_BOOLEAN__FLAGS ()
void g_cclosure_marshal_BOOLEAN__BOXED_BOXED ()
void g_cclosure_marshal_generic_va ()
void g_cclosure_marshal_VOID__VOIDv ()
void g_cclosure_marshal_VOID__BOOLEANv ()
void g_cclosure_marshal_VOID__CHARv ()
void g_cclosure_marshal_VOID__UCHARv ()
void g_cclosure_marshal_VOID__INTv ()
void g_cclosure_marshal_VOID__UINTv ()
void g_cclosure_marshal_VOID__LONGv ()
void g_cclosure_marshal_VOID__ULONGv ()
void g_cclosure_marshal_VOID__ENUMv ()
void g_cclosure_marshal_VOID__FLAGSv ()
void g_cclosure_marshal_VOID__FLOATv ()
void g_cclosure_marshal_VOID__DOUBLEv ()
void g_cclosure_marshal_VOID__STRINGv ()
void g_cclosure_marshal_VOID__PARAMv ()
void g_cclosure_marshal_VOID__BOXEDv ()
void g_cclosure_marshal_VOID__POINTERv ()
void g_cclosure_marshal_VOID__OBJECTv ()
void g_cclosure_marshal_VOID__VARIANTv ()
void g_cclosure_marshal_STRING__OBJECT_POINTERv ()
void g_cclosure_marshal_VOID__UINT_POINTERv ()
void g_cclosure_marshal_BOOLEAN__FLAGSv ()
void g_cclosure_marshal_BOOLEAN__BOXED_BOXEDv ()

Includes

#include <glib-object.h>

Description

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 responsibility of the marshaller to convert the arguments for the invocation from GValues into a suitable form, perform the callback on the converted arguments, and transform the return value back into a GValue.

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.

Within GObject, closures play an important role in the implementation of signals. When a signal is registered, the c_marshaller argument to g_signal_new() specifies the default C marshaller for any closure which is connected to this signal. GObject provides a number of C marshallers for this purpose, see the g_cclosure_marshal_*() functions. Additional C marshallers can be generated with the glib-genmarshal utility. Closures can be explicitly connected to signals with g_signal_connect_closure(), but it usually more convenient to let GObject create a closure automatically by using one of the g_signal_connect_*() functions which take a callback function/user data pair.

Using closures has a number of important advantages over a simple callback function/data pointer combination:

  • Closures allow the callee to get the types of the callback parameters, which means that language bindings don't have to write individual glue for each callback type.

  • The reference counting of GClosure makes it easy to handle reentrancy right; if a callback is removed while it is being invoked, the closure and its parameters won't be freed until the invocation finishes.

  • g_closure_invalidate() and invalidation notifiers allow callbacks to be automatically removed when the objects they point to go away.

Functions

G_CLOSURE_NEEDS_MARSHAL()

#define G_CLOSURE_NEEDS_MARSHAL(closure) (((GClosure*) (closure))->marshal == NULL)

Check if the closure still needs a marshaller. See g_closure_set_marshal().

Parameters

closure

a GClosure

 

Returns

TRUE if a GClosureMarshal marshaller has not yet been set on closure .


G_CLOSURE_N_NOTIFIERS()

#define             G_CLOSURE_N_NOTIFIERS(cl)

Get 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().

Parameters

cl

a GClosure

 

Returns

number of notifiers


G_CCLOSURE_SWAP_DATA()

#define G_CCLOSURE_SWAP_DATA(cclosure)	 (((GClosure*) (cclosure))->derivative_flag)

Checks whether the user data of the GCClosure should be passed as the first parameter to the callback. See g_cclosure_new_swap().

Parameters

cclosure

a GCClosure

 

Returns

TRUE if data has to be swapped.


G_CALLBACK()

#define G_CALLBACK(f)			 ((GCallback) (f))

Cast a function pointer to a GCallback.

Parameters

f

a function pointer.

 

GCallback ()

void
(*GCallback) (void);

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.


G_TYPE_CLOSURE

#define G_TYPE_CLOSURE (g_closure_get_type ())

The GType for GClosure.


GClosureMarshal ()

void
(*GClosureMarshal) (GClosure *closure,
                    GValue *return_value,
                    guint n_param_values,
                    const GValue *param_values,
                    gpointer invocation_hint,
                    gpointer marshal_data);

The type used for marshaller functions.

Parameters

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.

[allow-none]

n_param_values

the length of the param_values array

 

param_values

an array of GValues holding the arguments on which to invoke the callback of closure .

[array length=n_param_values]

invocation_hint

the invocation hint given as the last argument to g_closure_invoke().

[allow-none]

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

GVaClosureMarshal ()

void
(*GVaClosureMarshal) (GClosure *closure,
                      GValue *return_value,
                      gpointer instance,
                      va_list args,
                      gpointer marshal_data,
                      int n_params,
                      GType *param_types);

This is the signature of va_list marshaller functions, an optional marshaller that can be used in some situations to avoid marshalling the signal argument into GValues.

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

GClosureNotify ()

void
(*GClosureNotify) (gpointer data,
                   GClosure *closure);

The type used for the various notification callbacks which can be registered on closures.

Parameters

data

data specified when registering the notification callback

 

closure

the GClosure on which the notification is emitted

 

g_cclosure_new ()

GClosure *
g_cclosure_new (GCallback callback_func,
                gpointer user_data,
                GClosureNotify destroy_data);

Creates a new closure which invokes callback_func with user_data as the last parameter.

[skip]

Parameters

callback_func

the function to invoke

 

user_data

user data to pass to callback_func .

[closure callback_func]

destroy_data

destroy notify to be called when user_data is no longer used

 

Returns

a new GCClosure


g_cclosure_new_swap ()

GClosure *
g_cclosure_new_swap (GCallback callback_func,
                     gpointer user_data,
                     GClosureNotify destroy_data);

Creates a new closure which invokes callback_func with user_data as the first parameter.

[skip]

Parameters

callback_func

the function to invoke

 

user_data

user data to pass to callback_func .

[closure callback_func]

destroy_data

destroy notify to be called when user_data is no longer used

 

Returns

a new GCClosure.

[transfer full]


g_cclosure_new_object ()

GClosure *
g_cclosure_new_object (GCallback callback_func,
                       GObject *object);

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 useful when you have a callback closely associated with a GObject, and want the callback to no longer run after the object is is freed.

[skip]

Parameters

callback_func

the function to invoke

 

object

a GObject pointer to pass to callback_func

 

Returns

a new GCClosure


g_cclosure_new_object_swap ()

GClosure *
g_cclosure_new_object_swap (GCallback callback_func,
                            GObject *object);

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 useful when you have a callback closely associated with a GObject, and want the callback to no longer run after the object is is freed.

[skip]

Parameters

callback_func

the function to invoke

 

object

a GObject pointer to pass to callback_func

 

Returns

a new GCClosure


g_cclosure_marshal_generic ()

void
g_cclosure_marshal_generic (GClosure *closure,
                            GValue *return_gvalue,
                            guint n_param_values,
                            const GValue *param_values,
                            gpointer invocation_hint,
                            gpointer marshal_data);

A generic marshaller function implemented via libffi.

Normally this function is not passed explicitly to g_signal_new(), but used automatically by GLib when specifying a NULL marshaller.

Parameters

closure

A GClosure.

 

return_gvalue

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

Since: 2.30


g_closure_new_object ()

GClosure *
g_closure_new_object (guint sizeof_closure,
                      GObject *object);

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.

Parameters

sizeof_closure

the size of the structure to allocate, must be at least sizeof (GClosure)

 

object

a GObject pointer to store in the data field of the newly allocated GClosure

 

Returns

a newly allocated GClosure.

[transfer full]


g_closure_ref ()

GClosure *
g_closure_ref (GClosure *closure);

Increments the reference count on a closure to force it staying alive while the caller holds a pointer to it.

Parameters

closure

GClosure to increment the reference count on

 

Returns

The closure passed in, for convenience.

[transfer none]


g_closure_sink ()

void
g_closure_sink (GClosure *closure);

Takes over the initial ownership of a closure. Each closure is initially created in a "floating" state, which means that the initial reference count is not owned by any caller. g_closure_sink() checks to see if the object is still floating, and if so, unsets the floating state and decreases the reference count. If the closure is not floating, g_closure_sink() does nothing. The reason for the existence of the floating state is to prevent cumbersome code sequences like:

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closure = g_cclosure_new (cb_func, cb_data);
g_source_set_closure (source, closure);
g_closure_unref (closure); // GObject doesn't really need this

Because g_source_set_closure() (and similar functions) take ownership of the initial reference count, if it is unowned, we instead can write:

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g_source_set_closure (source, g_cclosure_new (cb_func, cb_data));

Generally, this function is used together with g_closure_ref(). Ane example of storing a closure for later notification looks like:

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static GClosure *notify_closure = NULL;
void
foo_notify_set_closure (GClosure *closure)
{
  if (notify_closure)
    g_closure_unref (notify_closure);
  notify_closure = closure;
  if (notify_closure)
    {
      g_closure_ref (notify_closure);
      g_closure_sink (notify_closure);
    }
}

Because g_closure_sink() may decrement the reference count of a closure (if it hasn't been called on closure yet) just like g_closure_unref(), g_closure_ref() should be called prior to this function.

Parameters

closure

GClosure to decrement the initial reference count on, if it's still being held

 

g_closure_unref ()

void
g_closure_unref (GClosure *closure);

Decrements the reference count of a closure after it was previously incremented by the same caller. If no other callers are using the closure, then the closure will be destroyed and freed.

Parameters

closure

GClosure to decrement the reference count on

 

g_closure_invoke ()

void
g_closure_invoke (GClosure *closure,
                  GValue *return_value,
                  guint n_param_values,
                  const GValue *param_values,
                  gpointer invocation_hint);

Invokes the closure, i.e. executes the callback represented by the closure .

Parameters

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.

[optional][out]

n_param_values

the length of the param_values array

 

param_values

an array of GValues holding the arguments on which to invoke the callback of closure .

[array length=n_param_values]

invocation_hint

a context-dependent invocation hint.

[allow-none]

g_closure_invalidate ()

void
g_closure_invalidate (GClosure *closure);

Sets a flag on the closure to indicate that its 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. Note that unless you are holding a reference to the closure yourself, the invalidation notifiers may unref the closure and cause it to be destroyed, so if you need to access the closure after calling g_closure_invalidate(), make sure that you've previously called g_closure_ref().

Note that g_closure_invalidate() will also be called when the reference count of a closure drops to zero (unless it has already been invalidated before).

Parameters

closure

GClosure to invalidate

 

g_closure_add_finalize_notifier ()

void
g_closure_add_finalize_notifier (GClosure *closure,
                                 gpointer notify_data,
                                 GClosureNotify notify_func);

Registers a finalization notifier which will be called when the reference count of closure goes down to 0. Multiple finalization notifiers on a single closure are invoked in unspecified order. If a single call to g_closure_unref() results in the closure being both invalidated and finalized, then the invalidate notifiers will be run before the finalize notifiers.

[skip]

Parameters

closure

a GClosure

 

notify_data

data to pass to notify_func .

[closure notify_func]

notify_func

the callback function to register

 

g_closure_add_invalidate_notifier ()

void
g_closure_add_invalidate_notifier (GClosure *closure,
                                   gpointer notify_data,
                                   GClosureNotify notify_func);

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.

[skip]

Parameters

closure

a GClosure

 

notify_data

data to pass to notify_func .

[closure notify_func]

notify_func

the callback function to register

 

g_closure_remove_finalize_notifier ()

void
g_closure_remove_finalize_notifier (GClosure *closure,
                                    gpointer notify_data,
                                    GClosureNotify notify_func);

Removes a finalization notifier.

Notice that notifiers are automatically removed after they are run.

[skip]

Parameters

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

 

g_closure_remove_invalidate_notifier ()

void
g_closure_remove_invalidate_notifier (GClosure *closure,
                                      gpointer notify_data,
                                      GClosureNotify notify_func);

Removes an invalidation notifier.

Notice that notifiers are automatically removed after they are run.

[skip]

Parameters

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

 

g_closure_new_simple ()

GClosure *
g_closure_new_simple (guint sizeof_closure,
                      gpointer data);

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.

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typedef struct _MyClosure MyClosure;
struct _MyClosure
{
  GClosure closure;
  // extra data goes here
};

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;
}

Parameters

sizeof_closure

the size of the structure to allocate, must be at least sizeof (GClosure)

 

data

data to store in the data field of the newly allocated GClosure

 

Returns

a newly allocated GClosure.

[transfer full]


g_closure_set_marshal ()

void
g_closure_set_marshal (GClosure *closure,
                       GClosureMarshal marshal);

Sets the marshaller of closure . The marshal_data of marshal provides a way for a meta marshaller to provide additional information to the marshaller. (See g_closure_set_meta_marshal().) For GObject's C predefined marshallers (the g_cclosure_marshal_*() functions), what it provides is a callback function to use instead of closure->callback .

[skip]

Parameters

closure

a GClosure

 

marshal

a GClosureMarshal function

 

g_closure_add_marshal_guards ()

void
g_closure_add_marshal_guards (GClosure *closure,
                              gpointer pre_marshal_data,
                              GClosureNotify pre_marshal_notify,
                              gpointer post_marshal_data,
                              GClosureNotify post_marshal_notify);

Adds a pair of notifiers which get invoked before and after the closure callback, respectively. This is typically used to protect the extra arguments for the duration of the callback. See g_object_watch_closure() for an example of marshal guards.

[skip]

Parameters

closure

a GClosure

 

pre_marshal_data

data to pass to pre_marshal_notify .

[closure pre_marshal_notify]

pre_marshal_notify

a function to call before the closure callback

 

post_marshal_data

data to pass to post_marshal_notify .

[closure post_marshal_notify]

post_marshal_notify

a function to call after the closure callback

 

g_closure_set_meta_marshal ()

void
g_closure_set_meta_marshal (GClosure *closure,
                            gpointer marshal_data,
                            GClosureMarshal meta_marshal);

Sets the meta marshaller of closure . A meta marshaller wraps closure->marshal and modifies the way it is called in some fashion. The most common use of this facility is for C callbacks. The same marshallers (generated by glib-genmarshal), are used everywhere, but the way that we get the callback function differs. In most cases we want to use closure->callback , but in other cases we want to use some different technique to retrieve the callback function.

For example, class closures for signals (see g_signal_type_cclosure_new()) retrieve the callback function from a fixed offset in the class structure. The meta marshaller retrieves the right callback and passes it to the marshaller as the marshal_data argument.

[skip]

Parameters

closure

a GClosure

 

marshal_data

context-dependent data to pass to meta_marshal .

[closure meta_marshal]

meta_marshal

a GClosureMarshal function

 

g_source_set_closure ()

void
g_source_set_closure (GSource *source,
                      GClosure *closure);

Set the callback for a source as a GClosure.

If the source is not one of the standard GLib types, the closure_callback and closure_marshal fields of the GSourceFuncs structure must have been filled in with pointers to appropriate functions.

Parameters

source

the source

 

closure

a GClosure

 

g_source_set_dummy_callback ()

void
g_source_set_dummy_callback (GSource *source);

Sets a dummy callback for source . The callback will do nothing, and if the source expects a gboolean return value, it will return TRUE. (If the source expects any other type of return value, it will return a 0/NULL value; whatever g_value_init() initializes a GValue to for that type.)

If the source is not one of the standard GLib types, the closure_callback and closure_marshal fields of the GSourceFuncs structure must have been filled in with pointers to appropriate functions.

Parameters

source

the source

 

g_cclosure_marshal_VOID__VOID ()

void
g_cclosure_marshal_VOID__VOID (GClosure *closure,
                               GValue *return_value,
                               guint n_param_values,
                               const GValue *param_values,
                               gpointer invocation_hint,
                               gpointer marshal_data);

A GClosureMarshal function for use with signals with no arguments.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__BOOLEAN ()

void
g_cclosure_marshal_VOID__BOOLEAN (GClosure *closure,
                                  GValue *return_value,
                                  guint n_param_values,
                                  const GValue *param_values,
                                  gpointer invocation_hint,
                                  gpointer marshal_data);

A GClosureMarshal function for use with signals with a single boolean argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__CHAR ()

void
g_cclosure_marshal_VOID__CHAR (GClosure *closure,
                               GValue *return_value,
                               guint n_param_values,
                               const GValue *param_values,
                               gpointer invocation_hint,
                               gpointer marshal_data);

A GClosureMarshal function for use with signals with a single character argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__UCHAR ()

void
g_cclosure_marshal_VOID__UCHAR (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with a single unsigned character argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__INT ()

void
g_cclosure_marshal_VOID__INT (GClosure *closure,
                              GValue *return_value,
                              guint n_param_values,
                              const GValue *param_values,
                              gpointer invocation_hint,
                              gpointer marshal_data);

A GClosureMarshal function for use with signals with a single integer argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__UINT ()

void
g_cclosure_marshal_VOID__UINT (GClosure *closure,
                               GValue *return_value,
                               guint n_param_values,
                               const GValue *param_values,
                               gpointer invocation_hint,
                               gpointer marshal_data);

A GClosureMarshal function for use with signals with with a single unsigned integer argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__LONG ()

void
g_cclosure_marshal_VOID__LONG (GClosure *closure,
                               GValue *return_value,
                               guint n_param_values,
                               const GValue *param_values,
                               gpointer invocation_hint,
                               gpointer marshal_data);

A GClosureMarshal function for use with signals with with a single long integer argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__ULONG ()

void
g_cclosure_marshal_VOID__ULONG (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with a single unsigned long integer argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__ENUM ()

void
g_cclosure_marshal_VOID__ENUM (GClosure *closure,
                               GValue *return_value,
                               guint n_param_values,
                               const GValue *param_values,
                               gpointer invocation_hint,
                               gpointer marshal_data);

A GClosureMarshal function for use with signals with a single argument with an enumerated type.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__FLAGS ()

void
g_cclosure_marshal_VOID__FLAGS (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with a single argument with a flags types.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__FLOAT ()

void
g_cclosure_marshal_VOID__FLOAT (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with one single-precision floating point argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__DOUBLE ()

void
g_cclosure_marshal_VOID__DOUBLE (GClosure *closure,
                                 GValue *return_value,
                                 guint n_param_values,
                                 const GValue *param_values,
                                 gpointer invocation_hint,
                                 gpointer marshal_data);

A GClosureMarshal function for use with signals with one double-precision floating point argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__STRING ()

void
g_cclosure_marshal_VOID__STRING (GClosure *closure,
                                 GValue *return_value,
                                 guint n_param_values,
                                 const GValue *param_values,
                                 gpointer invocation_hint,
                                 gpointer marshal_data);

A GClosureMarshal function for use with signals with a single string argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__PARAM ()

void
g_cclosure_marshal_VOID__PARAM (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with a single argument of type GParamSpec.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__BOXED ()

void
g_cclosure_marshal_VOID__BOXED (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with a single argument which is any boxed pointer type.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__POINTER ()

void
g_cclosure_marshal_VOID__POINTER (GClosure *closure,
                                  GValue *return_value,
                                  guint n_param_values,
                                  const GValue *param_values,
                                  gpointer invocation_hint,
                                  gpointer marshal_data);

A GClosureMarshal function for use with signals with a single raw pointer argument type.

If it is possible, it is better to use one of the more specific functions such as g_cclosure_marshal_VOID__OBJECT() or g_cclosure_marshal_VOID__OBJECT().

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__OBJECT ()

void
g_cclosure_marshal_VOID__OBJECT (GClosure *closure,
                                 GValue *return_value,
                                 guint n_param_values,
                                 const GValue *param_values,
                                 gpointer invocation_hint,
                                 gpointer marshal_data);

A GClosureMarshal function for use with signals with a single GObject argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__VARIANT ()

void
g_cclosure_marshal_VOID__VARIANT (GClosure *closure,
                                  GValue *return_value,
                                  guint n_param_values,
                                  const GValue *param_values,
                                  gpointer invocation_hint,
                                  gpointer marshal_data);

A GClosureMarshal function for use with signals with a single GVariant argument.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

Since: 2.26


g_cclosure_marshal_STRING__OBJECT_POINTER ()

void
g_cclosure_marshal_STRING__OBJECT_POINTER
                               (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with handlers that take a GObject and a pointer and produce a string. It is highly unlikely that your signal handler fits this description.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_VOID__UINT_POINTER ()

void
g_cclosure_marshal_VOID__UINT_POINTER (GClosure *closure,
                                       GValue *return_value,
                                       guint n_param_values,
                                       const GValue *param_values,
                                       gpointer invocation_hint,
                                       gpointer marshal_data);

A GClosureMarshal function for use with signals with a unsigned int and a pointer as arguments.

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_BOOLEAN__FLAGS ()

void
g_cclosure_marshal_BOOLEAN__FLAGS (GClosure *closure,
                                   GValue *return_value,
                                   guint n_param_values,
                                   const GValue *param_values,
                                   gpointer invocation_hint,
                                   gpointer marshal_data);

A GClosureMarshal function for use with signals with handlers that take a flags type as an argument and return a boolean. If you have such a signal, you will probably also need to use an accumulator, such as g_signal_accumulator_true_handled().

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_BOOLEAN__BOXED_BOXED ()

void
g_cclosure_marshal_BOOLEAN__BOXED_BOXED
                               (GClosure *closure,
                                GValue *return_value,
                                guint n_param_values,
                                const GValue *param_values,
                                gpointer invocation_hint,
                                gpointer marshal_data);

A GClosureMarshal function for use with signals with handlers that take two boxed pointers as arguments and return a boolean. If you have such a signal, you will probably also need to use an accumulator, such as g_signal_accumulator_true_handled().

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_generic_va ()

void
g_cclosure_marshal_generic_va (GClosure *closure,
                               GValue *return_value,
                               gpointer instance,
                               va_list args_list,
                               gpointer marshal_data,
                               int n_params,
                               GType *param_types);

A generic GVaClosureMarshal function implemented via libffi.

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args_list

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args_list .

[array length=n_params]

Since: 2.30


g_cclosure_marshal_VOID__VOIDv ()

void
g_cclosure_marshal_VOID__VOIDv (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__VOID().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__BOOLEANv ()

void
g_cclosure_marshal_VOID__BOOLEANv (GClosure *closure,
                                   GValue *return_value,
                                   gpointer instance,
                                   va_list args,
                                   gpointer marshal_data,
                                   int n_params,
                                   GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__BOOLEAN().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__CHARv ()

void
g_cclosure_marshal_VOID__CHARv (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__CHAR().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__UCHARv ()

void
g_cclosure_marshal_VOID__UCHARv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__UCHAR().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__INTv ()

void
g_cclosure_marshal_VOID__INTv (GClosure *closure,
                               GValue *return_value,
                               gpointer instance,
                               va_list args,
                               gpointer marshal_data,
                               int n_params,
                               GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__INT().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__UINTv ()

void
g_cclosure_marshal_VOID__UINTv (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__UINT().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__LONGv ()

void
g_cclosure_marshal_VOID__LONGv (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__LONG().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__ULONGv ()

void
g_cclosure_marshal_VOID__ULONGv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__ULONG().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__ENUMv ()

void
g_cclosure_marshal_VOID__ENUMv (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__ENUM().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__FLAGSv ()

void
g_cclosure_marshal_VOID__FLAGSv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__FLAGS().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__FLOATv ()

void
g_cclosure_marshal_VOID__FLOATv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__FLOAT().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__DOUBLEv ()

void
g_cclosure_marshal_VOID__DOUBLEv (GClosure *closure,
                                  GValue *return_value,
                                  gpointer instance,
                                  va_list args,
                                  gpointer marshal_data,
                                  int n_params,
                                  GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__DOUBLE().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__STRINGv ()

void
g_cclosure_marshal_VOID__STRINGv (GClosure *closure,
                                  GValue *return_value,
                                  gpointer instance,
                                  va_list args,
                                  gpointer marshal_data,
                                  int n_params,
                                  GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__STRING().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__PARAMv ()

void
g_cclosure_marshal_VOID__PARAMv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__PARAM().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__BOXEDv ()

void
g_cclosure_marshal_VOID__BOXEDv (GClosure *closure,
                                 GValue *return_value,
                                 gpointer instance,
                                 va_list args,
                                 gpointer marshal_data,
                                 int n_params,
                                 GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__BOXED().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__POINTERv ()

void
g_cclosure_marshal_VOID__POINTERv (GClosure *closure,
                                   GValue *return_value,
                                   gpointer instance,
                                   va_list args,
                                   gpointer marshal_data,
                                   int n_params,
                                   GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__POINTER().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__OBJECTv ()

void
g_cclosure_marshal_VOID__OBJECTv (GClosure *closure,
                                  GValue *return_value,
                                  gpointer instance,
                                  va_list args,
                                  gpointer marshal_data,
                                  int n_params,
                                  GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__OBJECT().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__VARIANTv ()

void
g_cclosure_marshal_VOID__VARIANTv (GClosure *closure,
                                   GValue *return_value,
                                   gpointer instance,
                                   va_list args,
                                   gpointer marshal_data,
                                   int n_params,
                                   GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__VARIANT().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_STRING__OBJECT_POINTERv ()

void
g_cclosure_marshal_STRING__OBJECT_POINTERv
                               (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_STRING__OBJECT_POINTER().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_VOID__UINT_POINTERv ()

void
g_cclosure_marshal_VOID__UINT_POINTERv
                               (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_VOID__UINT_POINTER().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_BOOLEAN__FLAGSv ()

void
g_cclosure_marshal_BOOLEAN__FLAGSv (GClosure *closure,
                                    GValue *return_value,
                                    gpointer instance,
                                    va_list args,
                                    gpointer marshal_data,
                                    int n_params,
                                    GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_BOOLEAN__FLAGS().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

g_cclosure_marshal_BOOLEAN__BOXED_BOXEDv ()

void
g_cclosure_marshal_BOOLEAN__BOXED_BOXEDv
                               (GClosure *closure,
                                GValue *return_value,
                                gpointer instance,
                                va_list args,
                                gpointer marshal_data,
                                int n_params,
                                GType *param_types);

The GVaClosureMarshal equivalent to g_cclosure_marshal_BOOLEAN__BOXED_BOXED().

Parameters

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.

[allow-none]

instance

the instance on which the closure is invoked.

[type GObject.TypeInstance]

args

va_list of arguments to be passed to the closure.

 

marshal_data

additional data specified when registering the marshaller, see g_closure_set_marshal() and g_closure_set_meta_marshal().

[allow-none]

n_params

the length of the param_types array

 

param_types

the GType of each argument from args .

[array length=n_params]

Types and Values

struct GClosure

struct GClosure {
  volatile       	guint	 in_marshal : 1;
  volatile       	guint	 is_invalid : 1;
};

A GClosure represents a callback supplied by the programmer.

Members

volatile        guint in_marshal : 1;

Indicates whether the closure is currently being invoked with g_closure_invoke()

 

volatile        guint is_invalid : 1;

Indicates whether the closure has been invalidated by g_closure_invalidate()

 

struct GCClosure

struct GCClosure {
  GClosure closure;
  gpointer callback;
};

A GCClosure is a specialization of GClosure for C function callbacks.

Members

GClosure closure;

the GClosure

 

gpointer callback;

the callback function

 

g_cclosure_marshal_BOOL__FLAGS

#define             g_cclosure_marshal_BOOL__FLAGS

An old alias for g_cclosure_marshal_BOOLEAN__FLAGS().

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()

 

g_cclosure_marshal_BOOL__BOXED_BOXED

#define             g_cclosure_marshal_BOOL__BOXED_BOXED

An old alias for g_cclosure_marshal_BOOLEAN__BOXED_BOXED().

Parameters

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 GValues holding the arguments on which to invoke the callback of closure.

 

invocation_hint

The invocation hint given as 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()